CN102578994A - Endoscope system - Google Patents
Endoscope system Download PDFInfo
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- CN102578994A CN102578994A CN2011104449035A CN201110444903A CN102578994A CN 102578994 A CN102578994 A CN 102578994A CN 2011104449035 A CN2011104449035 A CN 2011104449035A CN 201110444903 A CN201110444903 A CN 201110444903A CN 102578994 A CN102578994 A CN 102578994A
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Abstract
The invention discloses an endoscope system, wherein an LPF turntable and an SPF turntable are arranged in a wide-band light path (BB). The LPF turntable is provided with a first LPF and a second LPF, wherein the lower limits of the wavelengths of the first and second LPFs are different from each other. The SPF turntable is provided with a first SPF and a second SPF, wherein the upper limits of the wavelengths of the first and second LPFs are different from each other. The wide-band light (BB) can pass through the LPFs and the SPFs, so that a blue arrow-band light with a predetermined half-value width is generated.
Description
Technical field
The endoscopic system that the present invention relates to utilize the special light of the light of specific wavelength to observe.
Background technology
In recent years; Detect the common observation of intravital observation except utilizing the wide band of light of white light; It is also known for the endoscopic system (for example, with reference to TOHKEMY 2001-170009 communique) that the light (narrow band of light) that utilizes specific narrow wavelength range detects the special light observation of intravital observation.Observe as special light, when carrying out blood vessel emphasical, for example use the blue narrow band of light of light absorption peak value that near 415nm wave band has blood vessel as illumination light.
Through using so blue narrow band of light, can from illumination light, remove the wavelength components of leaving the high wave band of absorptivity.In observing picture, so vasculature part is darker because of light is absorbed, in addition, in the perienchyma of blood vessel, so do not carry out scattering owing to light is absorbed, reflection brightens.Thus, can access the observation picture of the contrast of having stressed blood vessel and its perienchyma.
The image of endoscope is based on from the signal of the imageing sensor of the leading section that is arranged at endoscope insertion part and generate.Thus, move etc., thereby when variation had taken place the distance of endoscope distal end portion and bio-tissue, the lightness of observing picture changed through forward end section of endoscope.For example, compare with observing at the close shot that endoscope distal end portion is observed near the position of bio-tissue, under the situation that the distant view of observing in the position that makes endoscope distal end portion leave bio-tissue is observed, deficiency in light quantity and cause the whole deepening of picture.Therefore,, distant view must increase the light quantity of blue narrow band of light when observing.On the other hand, owing to when close shot is observed in order stress to show that clearly top layer blood vessel etc. adopts enough lightnesses, possibly become and be difficult to observe so when increasing light quantity, observe picture.
For such problem, considered to change the half value fabric width or the wavelength range of blue narrow band of light, thereby made the method for the light quantity variation of the narrow band of light of this blueness through distance according to endoscope distal end portion and bio-tissue.Though the light that LED that uses as the light source of the narrow band of light of this blueness or LD can penetrate specific wavelength can't change the half value fabric width and the wavelength range of the light of ejaculation.
Summary of the invention
The object of the present invention is to provide a kind of endoscopic system that in close shot observation and distant view observation, all can access good observation picture.
To achieve these goals, endoscopic system of the present invention possesses broadband radiant, short-pass wave filter (シ ョ one ト パ ス Off イ Le タ) unit, long-pass wave filter (ロ Application グ パ ス Off イ Le タ) unit and narrow band of light ejecting mechanism.The broadband radiant penetrates the broadband light of white.Short-pass wave filter unit has one or more short-pass wave filters that the light with the wavelength below the set upper limit wavelength in the said broadband light is passed through, and the upper limit wavelength of each short-pass wave filter has nothing in common with each other.Long-pass wave filter unit has one or more long-pass wave filters that the light of the above wavelength of the lower limit wavelength with regulation that makes in the said broadband light passes through, and the lower limit wavelength of each long-pass wave filter has nothing in common with each other.Narrow band of light ejecting mechanism according to the illumination light quantity make in said one or more short-pass wave filter at least one of them with said one or more long-pass wave filters in one of them inserts in the light path of said broadband light at least, short-pass wave filter from insert said light path and long-pass wave filter penetrate the narrow band of light of provision wavelengths thus.
Be preferably; Said short-pass wave filter unit has the mutually different a plurality of blue short-pass wave filters of upper limit wavelength; Said long-pass wave filter unit has the mutually different a plurality of blue long-pass wave filters of lower limit wavelength; Said narrow band of light ejecting mechanism according to the illumination light quantity make in said a plurality of blue short-pass wave filter at least one of them with said a plurality of blue long-pass wave filters in one of them inserts in the light path of said broadband light at least, blue short-pass wave filter from insert said light path and blue long-pass wave filter penetrate blue narrow band of light thus.Be preferably, said illumination light quantity is corresponding with the half value fabric width of the narrow band of light of said blueness, and is far away more with the distance of look-out station, and the half value fabric width of the narrow band of light of then said blueness is big more.
Be preferably; Said short-pass wave filter unit has a blue short-pass wave filter; Said long-pass wave filter unit has the mutually different a plurality of blue long-pass wave filters of lower limit wavelength; Said narrow band of light ejecting mechanism according to the illumination light quantity make in a said blue short-pass wave filter and the said a plurality of blue long-pass wave filter one of them inserts in the light path of said broadband light at least, blue short-pass wave filter from insert said light path and blue long-pass wave filter penetrate blue narrow band of light thus.Preferably, said illumination light quantity is corresponding with the half value fabric width of the narrow band of light of said blueness, and is far away more with the distance of look-out station, and the half value fabric width of the narrow band of light of then said blueness is in that only short wavelength side is big more.
Be preferably; Said short-pass wave filter unit has mutually different a plurality of blue short-pass wave filters of upper limit wavelength and the mutually different a plurality of green short-pass wave filters of upper limit wavelength; Said long-pass wave filter unit has mutually different a plurality of blue long-pass wave filters of lower limit wavelength and the mutually different a plurality of green long-pass wave filters of lower limit wavelength; Said narrow band of light ejecting mechanism first insert make according to the illumination light quantity constantly in said a plurality of blue short-pass wave filter at least one of them with said a plurality of blue long-pass wave filters in one of them inserts in the light path of said broadband light at least; Blue short-pass wave filter from insert said light path and blue long-pass wave filter penetrate blue narrow band of light thus; Inserting the second constantly different insertions constantly with said first; Said narrow band of light ejecting mechanism through make in said a plurality of green short-pass wave filter at least one of them with said a plurality of green long-pass wave filters in one of them inserts in the light path of said broadband light at least, green short-pass wave filter from insert said light path and green long-pass wave filter penetrate green narrow band of light thus.Be preferably, said illumination light quantity is corresponding with the half value fabric width of narrow band of light of said blueness and the narrow band of light of said green, and is far away more with the distance of look-out station, and the half value fabric width of narrow band of light of then said blueness and the narrow band of light of said green is big more.
Be preferably the high wavelength range of the absorption coefficient of light that narrow band of light of said blueness and green narrow band of light have blood hemoglobin respectively.Be preferably, said narrow band of light ejecting mechanism is through change inserting short-pass wave filter and the combination of long-pass wave filter in the said light path, thereby changes the centre wavelength of said narrow band of light.
Endoscopic system of the present invention according to the illumination light quantity make in one or more short-pass wave filters at least one of them with one or more long-pass wave filters in one of them inserts in the light path of broadband light at least; Short-pass wave filter from insert said light path and long-pass wave filter penetrate the narrow band of light of provision wavelengths thus; Therefore; Through changing the combination of short-pass wave filter and long-pass wave filter, thereby can adjust the light quantity of narrow band of light.Thus, even observe or the distance to look-out station of distant view observation etc. changes light exposure is changed, also can change the light quantity of narrow band of light accordingly with the variation of its distance because of close shot.Consequently, can both obtain good observation picture under any situation in close shot observation and distant view observation.
Description of drawings
Fig. 1 is the skeleton diagram of endoscopic system.
Fig. 2 is the block diagram of the electric structure of expression endoscopic system.
Fig. 3 is that the front view with wave filter (UOF) turntable (タ one レ Star ト) is observed in expression usually.
Fig. 4 is the front view of long-pass wave filter (LPF) turntable.
Fig. 5 is the curve chart of the light transmission characteristic of expression the one LPF and the 2nd LPF.
Fig. 6 is the front view of short-pass wave filter (SPF) turntable.
Fig. 7 is the curve chart of the light transmission characteristic of expression the one SPF and the 2nd SPF.
Fig. 8 is the key diagram that is used to explain that the spectrophotometric intensity in the first narrow band of light used during apart from observing pattern distributes.
Fig. 9 is the key diagram that is used to explain that the spectrophotometric intensity of the narrow band of light of when the second distance observing pattern, using distributes.
Figure 10 is used to explain the key diagram that distributes at the spectrophotometric intensity that is the 3rd narrow band of light used during apart from observing pattern.
Figure 11 is the key diagram that is used to explain that the spectrophotometric intensity in the 4th narrow band of light used during apart from observing pattern distributes.
Figure 12 is the key diagram of tables of data.
Figure 13 is the flow chart of the flow process of the processing observed of the special light of expression in the endoscopic system.
Figure 14 is the front view of the LPF turntable of second embodiment.
Figure 15 is the curve chart of light transmission characteristic of first～the 2nd LPF of expression second embodiment.
Figure 16 is the front view of the SPF of second embodiment.
Figure 17 is the curve chart of light transmission characteristic of the SPF of expression second embodiment.
Figure 18 is the key diagram that is used to explain that the spectrophotometric intensity of the narrow band of light of when the close shot observing pattern of second embodiment, using distributes.
Figure 19 is the key diagram that is used to explain that the spectrophotometric intensity of the narrow band of light of when the distant view observing pattern of second embodiment, using distributes.
Figure 20 is the key diagram of the tables of data of second embodiment.
Figure 21 is the block diagram of electric structure of the endoscopic system of expression the 3rd embodiment.
Figure 22 A is the front view of the LPF turntable of the 3rd embodiment.
Figure 22 B is the curve chart of light transmission characteristic of first and second GLPF of expression the 3rd embodiment.
Figure 23 A is the front view of the SPF turntable of the 3rd embodiment.
Figure 23 B is the curve chart of light transmission characteristic of first and second GSPF of expression the 3rd embodiment.
Figure 24 is the flow chart of the flow process of the processing observed of the special light of expression in the 3rd embodiment.
Figure 25 is the key diagram that is used to explain that the spectrophotometric intensity in the first narrow band of light used during apart from observing pattern distributes.
Figure 26 is the key diagram that is used to explain that the spectrophotometric intensity in the 4th narrow band of light used during apart from observing pattern distributes.
The specific embodiment
[first embodiment]
As shown in Figure 1, endoscopic system 10 possesses: the fujinon electronic video endoscope 11 that (look-out station) in the pipe such as in patient's the digestive tube or in the trachea made a video recording, generate observation treatment of picture apparatus 12 in the pipe, fujinon electronic video endoscope 11 is supplied with light supply apparatus 13 to the illumination light of throwing light in managing, shown the monitor 14 of observing picture according to the image pickup signal that is obtained by fujinon electronic video endoscope 11.
Fujinon electronic video endoscope 11 possesses: the flexible insertion section 16 in the insertion tube, be connected with the base end part of insertion section 16 and be used for controlling and the operating portion 17 of the operation of insertion section 16, general line 18 that operating portion 17 and processor device 12 and light supply apparatus 13 are connected respectively of fujinon electronic video endoscope 11.
The front of insertion section 16 is leading section 16a, wherein is built-in with the optical system, CCD44 (with reference to Fig. 2) of illumination or photography in being used to manage etc.In addition, on the front end face of leading section 16a, also be provided with and omitted the illustrated delivery nozzle of supplying gas, pass the pliers outlet of the outlet that becomes the pliers passage in the insertion section 16 etc. except observation window 19 (with reference to Fig. 2), the illuminating window 20 (with reference to Fig. 2).Be provided with crooked bending section 16b freely in the rear end of leading section 16a.
On general line 18, be incorporated with the aquaporin of supplying gas/send, signal cable and light guiding piece etc.Leading section in this general line 18 is provided with connector portion 25a.This connector portion 25a is connected with light supply apparatus 13.In addition, from the connector portion 25a bifurcation connector 25b of portion.This connector portion 25b is connected with processor device 12.
As shown in Figure 2, light supply apparatus 13 possesses: broadband light source 30, the common observation under common observing pattern, used are with wave filter (UOF:Usually Observed Filter) turntable 31, at long-pass wave filter (LPF:Long Pass Filter) turntable 32 and short-pass wave filter (SPF:Short Pass Filter) turntable 33, turntable shifter 34, turntable rotating mechanism 35 and the collecting lens 36 of special light observing pattern to use.
When common observing pattern, the part of UOF turntable 31 is inserted in the light path of the broadband light BB that penetrates from broadband light source 30.In addition, when the special light observing pattern, the part of LPF turntable 32 and SPF turntable 33 is inserted in the light path of broadband light BB simultaneously.
As shown in Figure 3, UOF turntable 31 possesses along the blue filter 37B of the circumferential setting of its rotating shaft 31a, green filter 37G and red filter 37R.Blue filter 37B makes light (B light) transmission of the blue wave band among the broadband light BB.Green filter 37G makes light (G light) transmission of the green wave band among the broadband light BB.Red filter 37R makes light (R light) transmission of the red wave band among the broadband light BB.
As shown in Figure 4, LPF turntable 32 possesses along a LPF38a of the semi-circular shape of the circumferential setting of its rotating shaft 32a and the 2nd LPF38b.First～the 2nd LPF38a, 38b pass through the light of the above wavelength of the lower limit wavelength with regulation among the incident broadband light BB.
As shown in Figure 5, the lower limit wavelength X m1 of a LPF38a sets the low value of lower limit wavelength X m2 than the 2nd LPF38b for.First～the 2nd LPF38a, 38b optionally insert in the light path of broadband light BB when the special light observing pattern through the rotation of LPF turntable 32.
As shown in Figure 6, SPF turntable 33 possesses along a SPF39a of the semi-circular shape of the circumferential setting of its rotating shaft 33a and the 2nd SPF39b.First～the 2nd SPF39a, 39b pass through the light with the wavelength below the set upper limit wavelength among the incident broadband light BB.
As shown in Figure 7, the upper limit wavelength X u1 of a SPF39a sets the low value of lower limit wavelength X u2 than the 2nd SPF39b for.In addition, upper limit wavelength X u1 sets the high value of lower limit wavelength X m2 than the 2nd LPF38b for.First～the 2nd SPF39a, 39b optionally insert in the light path of broadband light BB when the special light observing pattern through the rotation of SPF turntable 33.
As shown in Figure 2, turntable shifter 34 moves UOF turntable 31, LPF turntable 32 and SPF turntable 33 respectively along the direction with respect to the light path approximate vertical of broadband light BB.Turntable shifter 34 inserts between the retreating position that on position and panchromatic light filter 37B in the light path of broadband light BB, 37G, 37R keep out of the way in the light path UOF turntable 31 one of them in its light filter 37B of all kinds, 37G, 37R and moves.And turntable shifter 34 makes UOF turntable 31 move on position when common observing pattern, when the special light observing pattern, makes UOF turntable 31 move to retreating position.
In addition, turntable shifter 34 makes between LPF turntable 32 and SPF turntable 33 (below, be called for short LPF/SPF turntable 32, the 33) retreating position that the on position in the light path of inserting broadband light BB and full light filter are kept out of the way in the light path respectively mobile.And turntable shifter 34 makes LPF/ SPF turntable 32,33 move to retreating position when common observing pattern, when the special light observing pattern, makes LPF/ SPF turntable 32,33 move on position.
When making one of them and first～the 2nd SPF39a among first～the 2nd LPF38a, the 38b, among the 39b one of them insert in the light path of broadband light BB respectively through turntable shifter 34, generate the blue narrow band of light that is limited in blue particular wavelength band.Insert first～the 4th following insertion form (パ タ one Application) of being combined into of the interior LPF/SPF of this light path, insert form according to each and generate half value fabric width or the four kinds of different narrow band of light Bn1 of blueness～Bn4 of centre wavelength.First～the 4th inserts form is selected during apart from observing pattern first～the 4th respectively.
(1) first inserts form: the 2nd LPF38b, a SPF39a
(2) second insert form: the 2nd LPF38b, the 2nd SPF39b
(3) the 3rd insert form: a LPF38a, a SPF39a
(4) the 4th insert form: a LPF38a, the 2nd SPF39b
Insert under the form first, at first, shown in Fig. 8 (A), light transmission the 2nd LPF38b of the wavelength range that the lower limit wavelength X m2 among the broadband light BB is above.Then, shown in Fig. 8 (B), seen through light transmission the one SPF39a of the wavelength range below the upper limit wavelength X u1 in the light of the 2nd LPF38b.Thus, shown in Fig. 8 (C), generating wavelength range is that λ m2～λ u1, centre wavelength are the blue narrow band of light Bn1 of λ c1.In addition, in this embodiment, in order to prevent the complicated of drawing, it is rectangular-shaped making the waveform of blue narrow band of light Bn1 (Bn2～Bn4 too), so its half value fabric width h1 is " λ u1-λ m2 ".Said half value fabric width is meant that the peak value of light quantity becomes the wavelength range of half the part.
Insert under the form second, shown in Fig. 9 (A), (B), broadband light BB is successively through the 2nd LPF38b, the 2nd SPF39b, and generating wavelength range such shown in Fig. 9 (C) thus is the blue narrow band of light Bn2 of λ m2～λ u2.The half value fabric width h2 of the narrow band of light Bn2 of this blueness is " λ u2-λ m2 ", and centre wavelength is λ c2.
Insert under the form the 3rd, shown in Figure 10 (A), (B), broadband light BB is successively through a LPF38a, a SPF39a, and generating wavelength range such shown in Figure 10 (C) thus is the blue narrow band of light Bn3 of λ m1～λ u1.The half value fabric width h2 of the narrow band of light Bn3 of this blueness is " λ u1-λ m1 ", and centre wavelength is λ c3.
Insert under the form the 4th, shown in Figure 11 (A), (B), broadband light BB is successively through a LPF38a, the 2nd SPF39b, and generating wavelength range such shown in Figure 11 (C) thus is the blue narrow band of light Bn4 of λ m1～λ u2.The half value fabric width h4 of the narrow band of light Bn3 of this blueness is " λ u2-λ m1 ", and centre wavelength is λ c4.
It is corresponding that the wavelength range of each blue narrow band of light Bn1～Bn4 is adjusted near the peak value (for example the 415nm) of the short wavelength side in two absorption peaks with the absorption spectrum of the light of hemoglobin.In addition, each blue narrow band of light Bn1～Bn4 half value fabric width separately satisfies h1＜h2＜h3＜h4, therefore if light quantity more separately then satisfies Bn1＜Bn2＜Bn3＜Bn4.And then the central wavelength lambda c1 of each blue narrow band of light Bn1～Bn4～λ c4 also becomes mutually different value.
Shine blue narrow band of light Bn1～Bn4 on the bio-tissue and receive the extremely strong absorption of the endovascular blood in top layer (hemoglobin) in the bio-tissue.In addition, on the contrary, on the bio-tissue of the periphery of top layer blood vessel, the major part reflection of the light that will shine through stronger scattering properties makes it be back to leading section 16a.Thus, the contrast of the bio-tissue that the top layer blood vessel is peripheral with it becomes high, therefore can fully stress to show top layer blood vessel etc.In addition, wavelength range (half value fabric width) is big more, and it is high more then to shine the probability that the blue narrow band of light on the blood vessel of top layer returns leading section 16a because of reflection or scattering.In this case, though contrast reduces, light quantity increases.
On the other hand, the turntable rotating mechanism 35 during the special light observing pattern inserts form first apart from LPF/SPF is rotated to become first, under the second distance observing pattern, makes the LPF/SPF rotation insert form to become second.Insert form the 3rd apart from LPF/SPF is rotated to become the 3rd, insert form apart from LPF/SPF is rotated to become the 4th the 4th.
Collecting lens 36 is configured in when common observing pattern on the light path of the B light that penetrates from UOF turntable 31, G light, R light, when the special light observing pattern, is configured on the light path of the blue narrow band of light Bn1～Bn4 that penetrates from LPF/SPF turntable 32,33.Collecting lens 36 makes incident each illumination light to 41 incidents of light guiding piece.
Through above-mentioned each structure, light supply apparatus 13 penetrates B light, G light, R light to light guiding piece 41 repeatedly when common observing pattern.In addition, light supply apparatus 13 penetrates blue narrow band of light Bn1～Bn4 to light guiding piece 41 respectively according to each sub-observing pattern under the special light observing pattern.
Fujinon electronic video endoscope 11 possesses light guiding piece 41, CCD type imageing sensor (below, be called CCD) 44, analog processing circuit (AFE:Analog Front End) 45, imaging control part 46.Light guiding piece 41 is heavy caliber optical fiber, fibre bundle etc.The incident end of this light guiding piece 41 inserts light supply apparatus 13, and exit end is faced with the irradiation lens 48 in being arranged on leading section 16a mutually.Pass through illuminating window 20 to the pipe internal radiation from light guiding piece 41 to irradiation lens 48 incident illumination light.And, pass through observation window 19 to collecting lens 51 incidents by the light of pipe internal reflection.
CCD44 has a plurality of photodiodes (not shown) two-dimensional arrangements and the shooting face 44a that forms, will convert electric image pickup signal to and exports to AFE45 from the collecting lens 51 incident body light that are taken.This CCD44 is the monochromatic CCD with spectral sensitivity of regulation.In addition, also can replace CCD and use the imageing sensor of MOS type to come look-out station is made a video recording.On CCD44, be connected with imaging control part 46 by processor device 12 controls.
Imaging control part 46 is connected with processor device 12 interior CPU, CCD44 is sent according to instruction from this CPU and drives signal.CCD44 exports image pickup signal with the frame frequency (Off レ one system レ one ト) of regulation to AFE45 according to the driving signal from imaging control part 46.When common observing pattern; According to the rotation of UOF turntable 31, thereby thereby thereby carry out step through the accumulating/read of the signal charge that carries out based on the opto-electronic conversion of B light/transmit output blue picture signal, the step through the accumulating/read of the signal charge that carries out based on the opto-electronic conversion of G light/transmit output green video signal repeatedly, through the accumulating/read of the signal charge that carries out based on the opto-electronic conversion of R light/the transmit step of output red picture signal.
In addition, when the special light observing pattern, through based on one of them the accumulating/read of signal charge/transmit of opto-electronic conversion among the narrow band of light Bn1 of blueness～Bn4, thereby to AFE45 output first～the 4th blue narrow wave band image pickup signal.
Though omitted diagram, AFE45 is made up of correlated double sampling circuit (CDS), automatic gain control circuit (AGC) and analog/digital converter (A/D).Thereby CDS removes interference to implementing the correlated double sampling processing from the image pickup signal of CCD44.AGC makes through CDS and has removed interferential image pickup signal amplification.A/D will convert to by the image pickup signal after the AGC amplification regulation bit number numeral image pickup signal and send to processor device 12.
CPU54 is connected with the each several part of processor device 12, the imaging control part 46 of fujinon electronic video endoscope 11 and turntable shifter 34, the turntable rotating mechanism 35 of light supply apparatus 13 through holding wire, according to the program of reading or data from memorizer 53 with they overall control.
DSP55 carries out signal processing such as white balance (ホ ワ イ ト バ ラ Application ス) adjustment, tone processing, gray scale (シ ヤ one プ ネ ス) processing, sharpening processing to the image pickup signal from the AFE45 input.DSP55 when common observing pattern through the blue image pickup signal of importing successively from AFE45, green image pickup signal, red image pickup signal are implemented above-mentioned signal processing, thereby generate the trichromatic common view data of B, G, R successively.Said common view data stores in the frame memory 56 successively.
On the other hand, DSP55 handles through according to each sub-observing pattern first～the 4th blue narrow wave band image pickup signal of importing respectively from AFE45 being implemented appropriate signals when the special light observing pattern, thereby generates the special light view data.This special light view data also is stored in the frame memory 56.
Move when the special light observing pattern apart from judging part 57.Detect light exposure apart from judging part 57 according to the luminance signal that newly stores the special light view data in the frame memory 56 into, according to this light exposure testing result judge between leading section 16a and the look-out station apart from d.Except taking place under the special situation such as pathological changes, digestive tube and the endotracheal color that becomes the mucosa top layer of look-out station do not have big difference.Therefore, as long as the light quantity of each illumination light that penetrates from light supply apparatus 13 is fixed, then along with apart from the increase of d and light exposure reduces, on the contrary along with apart from reducing of d and light exposure increases.Therefore, through making expression respectively apart from tables of data of the relation of d and light exposure etc. according to the kind of illumination light in advance, thereby can obtain apart from d by light exposure.
Observing pattern change-over switch 59 is being operated the observing pattern of endoscopic system 10 when common observing pattern or special light observing pattern are switched.
Shown in figure 12, in tables of data 61, will and respectively insert form and store accordingly apart from the scope of d and each the sub-observing pattern under the special observing pattern.In this embodiment, be divided into d＜L1, L1≤d＜L2, L2≤d＜L3, these four scopes of d>=L3 apart from the scope of d, from apart from the little scope of d successively with each sub-observing pattern and respectively insert the form correspondence.Thus, CPU54 can be according to the kind of the kind of confirming sub-observing pattern apart from d and insertion form through comparable data table 61.
CPU54 sets observing pattern for the special light observing pattern utilizing observing pattern change-over switch 59 to select to set observing pattern for common observing pattern under the situation of common observing pattern under the situation of having selected the special light observing pattern.In addition, CPU54 under the situation of setting the special light observing pattern for according to confirming sub-observing pattern apart from the judged result of judging part 57.And, the insertion morphology Control turntable rotating mechanism 35 that the CPU54 basis is corresponding with sub-observing pattern, thus switch from the kind of the blue narrow band of light of light supply apparatus 13 ejaculations.
Next, utilize flow chart shown in Figure 13 that the effect of the endoscopic system 10 of said structure is described.When the power supply of processor device 12 and light supply apparatus 13 grades is switched on and when carrying out endoscopic preparation and handling (below, be called inspection and prepare to handle), the driving of CCD44 begins, and begin from the ejaculation of the broadband light BB of broadband light source 30.In addition, set common observing pattern under the original state of endoscopic system 10 when power connection.
CPU54 is control turntable shifter 34 in inspection prepares to handle, and makes UOF turntable 31 move on position, and makes LPF/ SPF turntable 32,33 move to retreating position.Next, CPU54 control turntable rotating mechanism 35 makes UOF turntable 31 rotate with fixed speed.Thus, penetrate B light, G light, R light to collecting lens 36 repeatedly from UOF turntable 31.
When the processing end is prepared in inspection, in the pipes such as the insertion section 16 insertion patients' of fujinon electronic video endoscope 11 digestive tube or trachea.The B light, G light, R light of injecting collecting lens 36 one by one is respectively through light guiding piece 41, irradiation lens 48 and illuminating window 20 and one by one to patient's pipe internal radiation.Thus, by the B light, G light, R light of this pipe internal reflection/scattering one by one to observation window 19 incidents, and then through collecting lens 51 one by one to CCD44 incident.CCD44 carries out opto-electronic conversion one by one with B light, G light, R light, thereby blue image signal, green video signal, red image signal are exported to AFE45 one by one.
AFE45 is to implementing various signal processing from the image pickup signal of CCD44, thus successively with the blue image pickup signal of numeral, green image pickup signal, red image pickup signal to the DSP55 of processor device 12 output.Image pickup signal of all kinds stores in the frame memory 56 as trichromatic common view data after having implemented various signal processing through DSP55 successively.Display control circuit 58 is read each the common view data that newly stores in the frame memory 56, each common view data based on these and on monitor 14, show to observe picture.
Below, before observing pattern switches to special light observing pattern or splanchnoscopy end, carry out obtaining and the monitor demonstration of image usually of common view data repeatedly.
When switching to the special light observation from common observation, observing pattern change-over switch 59 is switched to the special light observing pattern.In addition, under the special light observing pattern, under original state, for example set first for apart from observing pattern.CPU54 and then sends first to turntable rotating mechanism 35 and inserts form and cut for instruction after turntable shifter 34 being sent turntable and cutting for instruction.
Blue narrow band of light Bn1 is through the pipe internal radiation of light guiding piece 41 grades to the patient.Thus, the blue narrow band of light Bn1 by this pipe internal reflection/scattering passes through observation window 19 grades to CCD44 incident.CCD44 carries out opto-electronic conversion to the narrow band of light Bn1 of blueness and the first blue narrow wave band image pickup signal is exported to AFE45.Thus, send the first blue narrow wave band image pickup signal of numeral to DSP55, generate the special light view data through this DSP55 and store in the frame memory 56 from AFE45.And display control circuit 58 is read the special light view data that newly stores in the frame memory 56, makes according to this special light view data and observes picture demonstration on monitor 14.
In addition; Apart from judging part 57 when having new special light image data storage in frame memory 56; Detect light exposure according to the luminance signal of this special light view data, so according to this light exposure testing result judge between leading section 16a and the look-out station apart from d.Apart from the judged result of judging part 57 to CPU54 transmission range d.
CPU54 receive from apart from judging part 57 apart from judged result, with reference to the tables of data 61 in the memorizer 53.And CPU54 makes first to continue apart from observing pattern when satisfying d＜L1 apart from d.Below, sub-observing pattern change or special light observe finish before, carry out the demonstration that obtains, observes picture of the special light view data under the irradiation of the narrow band of light Bn1 of blueness repeatedly, apart from the judgement of d and the reference of tables of data 61.
On the contrary, CPU54 judge apart from judging part 57 satisfy L1≤d＜L2 or L2≤d＜L3 or d>=L3 apart from d the time, sub-observing pattern is switched to second～the 4th respectively apart from observing pattern.Particularly, CPU54 respectively sends second according to second～the 4th apart from observing pattern to turntable rotating mechanism 35 and inserts form and cut and insert form for instruction～the four and cut for instruction.
When each sub-observing pattern by patient's pipe in respectively the blue narrow band of light Bn2～Bn4 of reflect/scatter to CCD44 incident.Below, with first during apart from observing pattern likewise, carry out successively based on CCD44 opto-electronic conversion, based on signal processing of AFE45 and DSP55 etc., thereby with the special light image data storage in frame memory 56.And, according to this special light view data the observation picture is shown on monitor 14, and the judgement through carrying out apart from d apart from judging part 57.
CPU54 according to based on apart from judging part 57 apart from the judged result of d and comparable data table 61 when continuing current sub-observing pattern, is carried out the demonstration that obtains, observes picture of special light view data, repeatedly apart from the judgement of d, the reference of tables of data 61.On the contrary.When switching to other sub-observing pattern, the switching that CPU54 inserts form through control turntable rotating mechanism 35, thus switch from the kind of the blue narrow band of light Bn1～Bn4 of light supply apparatus 13 ejaculations.
Below, before special light is observed end, switch the blue narrow band of light Bn1～Bn4 that penetrates from light supply apparatus 13 according to the size of judging apart from judging part 57 apart from d.Along with elongated apart from d, the light that penetrates from light supply apparatus 13 switches according to the order of the narrow band of light Bn1 of blueness, blue narrow band of light Bn2, blue narrow band of light Bn3, blue narrow band of light Bn4.On the contrary, along with shortening apart from d, the light that penetrates from light supply apparatus 13 switches according to the order of the narrow band of light Bn4 of blueness, blue narrow band of light Bn3, blue narrow band of light Bn2, blue narrow band of light Bn1.
Owing to as above-mentioned,, therefore shine the light quantity increase of the blue narrow band of light in patient's the pipe along with elongated apart from d and half value fabric width blue narrow band of light that penetrate from light supply apparatus 13 broadens.Consequently, can prevent deficiency in light quantity when distant view is observed and the situation of the whole deepening of picture.In addition, because the half value fabric width of the blue narrow band of light that penetrates from light supply apparatus 13 along with shortening apart from d narrows down, the light quantity that therefore shines the blue narrow band of light in patient's the pipe reduces.Consequently, can prevent when close shot is observed the situation that is difficult to observe as too becoming clear.Thus, the size apart from d regardless of close shot observation and distant view observation etc. can both obtain good observation picture.
In above-mentioned first embodiment, observe the narrow band of light of using as special light and be illustrated as example, but also can penetrate narrow band of light of all kinds such as for example green narrow band of light or red narrow band of light with the narrow band of light of blueness.
[second embodiment]
Next, the endoscopic system to second embodiment of the present invention describes.In the first embodiment, carry out in short wavelength side, these both sides of long wavelength side blue narrow band of light the half value fabric width expansion or dwindle and the expansion of half value fabric width or only dwindle and carry out in second embodiment at short wavelength side.
In addition, the endoscopic system of second embodiment except being provided with the LPF turntable 65 (with reference to Figure 14) and SPF66 (with reference to Figure 16) this point different with the endoscopic system of first embodiment 10, for the essentially identical structure of first embodiment.Thus, for marking prosign and omit its explanation with first embodiment identical part on functional structure.
Shown in figure 14, LPF turntable 65 inserts in the light path of broadband light BB when the special light observing pattern through turntable shifter 34.This LPF turntable 65 possesses along a LPF68a of the semi-circular shape of the circumferential setting of its rotating shaft 65a and the 2nd LPF68b.First～the 2nd LPF68a, 68b make 65 rotations of LPF turntable through turntable rotating mechanism 35 and optionally insert in the light path of broadband light BB.
Shown in figure 15, first～the 2nd LPF68a, 68b pass through the light with the above wavelength of common lower limit wavelength X mx.Lower limit wavelength X mx is near the value the wavelength 400nm for example.The absorbance of the one LPF68a is from rising near the wavelength 400nm gradually, and absorbance sharply rises to maximum in the time of near near wavelength 460nm.On the other hand, the absorbance of the 2nd LPF68b rises to maximum haply near lower limit wavelength X mx.
Shown in figure 16, SPF66 inserts in the light path of broadband light BB when the special light observing pattern through turntable shifter 34.In second embodiment, because the direction of the half value fabric width of the blue narrow band of light of expansion is only for fixing on short wavelength side, so the kind of SPF is a kind of.
Shown in figure 17, SPF66 passes through the light with the wavelength below the upper limit wavelength X my.Upper limit wavelength X my is near the value the wavelength 470nm for example.
When the special light observing pattern, one of them of first～the 2nd LPF68a, 68b optionally inserted in the light path of broadband light BB, and therewith relatively, SPF66 is inserted in the light path all the time.Therefore, insert being combined into of each LPF/SPF in the light path of broadband light BB following the first～the second insert form, insert form according to each and generate the different narrow band of light Bn α of two kinds of bluenesss, the Bn β of half value fabric width.
(1) first inserts form: a LPF68a, SPF66
(2) second insert form: the 2nd LPF68b, SPF66
Shown in Figure 18 (A), (B), insert in the form first, broadband light BB is successively through a LPF68a, SPF66, and generating half value fabric width such shown in Figure 18 (C) thus is the blue narrow band of light Bn α of h α.In addition, in the drawings, the chart spacing of wavelength 460nm～470nm is shown as than reality wide (among Figure 19 (C) too).
Near blue narrow band of light Bn α its light quantity wavelength is 460nm reaches peak value, and the rapid minimizing of its light quantity roughly becomes " 0 " in the time of near surpassing 470nm.On the other hand, though lean near than 460nm the minimizing of short wavelength side light quantity not have sharply to arrive the degree of the light quantity minimizing that kind of long wavelength side, light quantity is becoming " 0 " from reducing near the 400nm near the 460nm less than 400nm vicinity light quantity.
Shown in Figure 19 (A), (B), insert under the form first, broadband light BB is the blue narrow band of light Bn β of h β successively through the 2nd LPF68b, SPF66 thereby generate half value fabric width such shown in Figure 19 (C).Blue narrow band of light Bn β and blue narrow band of light Bn α likewise lean on long wavelength side near arriving the 470nm of peaking than light quantity, its light quantity reduces sharp.On the contrary, lean on short wavelength side near than 460nm, with the narrow band of light Bn α of blueness differently near the 400nm, keeping high light quantity near the 460nm.And near less than 400nm, light quantity begins sharply minimizing and becomes " 0 ".
In addition, the upper limit wavelength of the upper limit wavelength of half value fabric width h β and half value fabric width h α is roughly the same, relative therewith, and the lower limit wavelength of the lower limit wavelength ratio half value fabric width h α of half value fabric width h β is little.Therefore, the blue narrow band of light Bn β light that roughly constant and light quantity short wavelength side has increased with respect to the narrow band of light Bn α of the blueness light quantity that is long wavelength side.
So make the light quantity increase of the short wavelength side of blue narrow band of light Bn β be based on following reason.Absorption characteristic by known hemoglobin can be known; The light less than near the wavelength the 460nm in the light of irradiation receives the endovascular blood in top layer (the extremely strong absorption of hemoglobin (ヘ モ グ ロ ピ Application) in the bio-tissue; With respect to this; On the contrary, surpassing near the 460nm light is absorbed by hemoglobin hardly and directly sees through.In addition; By the opinion relevant (for example with the light scattering characteristic of bio-tissue; With reference to Figure 10 of above-mentioned TOHKEMY 2001-170009 communique) etc. can know; If the light wavelength of irradiation surpasses near the 470nm, then the major part of the irradiated light of blood vessel is absorbed and does not return leading section 16a on the top layer.Therefore, through only expanding the half value fabric width of blue narrow band of light Bn β, thereby the reduction of the contrast of top layer blood vessel and its peripheral bio-tissue be can suppress, the emphasical demonstration and light quantity increase of top layer blood vessel therefore can be realized simultaneously at short wavelength side.
Shown in figure 20, in the endoscopic system of second embodiment, the storage tables of data 70 different in memorizer 53 with first embodiment.In tables of data 70, will store accordingly apart from two seed observing patterns under the scope of d, the special observing pattern (close shot observing pattern, distant view observing pattern) and each insertion form.In this embodiment, when being d＜L2 apart from d, becoming close shot observing pattern and first and insert form, on the contrary, when d >=L2, become distant view observing pattern and second and insert form.
Below, with above-mentioned first embodiment likewise, CPU54 confirms the kind of sub-observing pattern and inserts the kind of form apart from d according to what judged apart from judging part 57 through comparable data table 70.Thus, when close shot is observed, in light path with a LPF68a and SPF66 insertion broadband light BB, thereby from the few blue narrow band of light Bn α of light supply apparatus 13 quantity of light emission.In addition, when distant view is observed, in light path with the 2nd LPF68b and SPF66 insertion broadband light BB, thereby from the many blue narrow band of light Bn β of light supply apparatus 13 quantity of light emission.Consequently, with first embodiment likewise, no matter close shot is observed and how the size apart from d of distant view observation etc. can both obtain good observation picture.
[the 3rd embodiment]
Next, utilize Figure 21 that the endoscopic system 75 of the 3rd embodiment of the present invention is described.In the endoscopic system 10 of above-mentioned first embodiment; Situation to penetrating blue narrow band of light from light supply apparatus 13 when the special light observing pattern is illustrated; But in endoscopic system 75, on the basis of the narrow band of light of blueness, also carry out the ejaculation of green narrow band of light.
Shown in Figure 22 A, LFP turntable 79 is provided with along first green (G) LPF82a and the 2nd GLPF82b (the second long-pass wave filter) of first blueness (B) LPF81a of the quadrant shape of the circumferential setting of its rotating shaft 79a and the 2nd BLPF81b (the first long-pass wave filter (ロ Application グ パ ス Off イ Le タ)), quadrant shape.First～the 2nd BLPF81a, 81b have respectively and first of first embodiment～the 2nd LPF38a, light transmission characteristic that 38b is identical.
Shown in Figure 22 B, first～the 2nd GLPF82a, 82b pass through the light of the above wavelength of the lower limit wavelength with regulation among the incident broadband light BB.The lower limit wavelength X gm1 (with reference to Figure 26) of the one GLPF82a sets the low value of lower limit wavelength X gm2 (with reference to Figure 25) than the 2nd LPF38b for.
Shown in Figure 23 A, SFP turntable 80 is provided with along a GSPF85a and the 2nd GSPF85b (the second short-pass wave filter) of a BSPF84a of the quadrant shape of the circumferential setting of its rotating shaft 80a and the 2nd BSPF84b (the first short-pass wave filter (シ ョ one ト パ ス Off イ Le タ)), quadrant shape.First～the 2nd BSPF84a, 84b have respectively and first of first embodiment～the 2nd SPF39a, light transmission characteristic that 39b is identical.
Shown in Figure 23 B, first～the 2nd GSPF85a, 85b pass through the light with the wavelength below the set upper limit wavelength among the incident broadband light BB.The upper limit wavelength X gu1 (with reference to Figure 25) of the one GSPF85a sets the low value of upper limit wavelength X gu2 (with reference to Figure 26) than the 2nd LPF85b for.In addition, upper limit wavelength X gu1 sets the high value of lower limit wavelength X gm2 than the 2nd GLPF82b for.
Shown in figure 21, first～the 2nd BLPF81a, 81b and first～the 2nd BSPF84a, 84b first of homomorphosis～the 4th B that respectively inserts of basis and first embodiment when the special light observing pattern inserts form and is inserted in the light path of broadband light BB.Said first～the 4th B inserts form and is selected during apart from observing pattern first～the 4th respectively.Thus, insert form according to each B and generate blue narrow band of light Bn1～Bn4 respectively.
In addition; Insert in the light path of broadband light BB through one of them and first～the 2nd GSPF85a among first～the 2nd GLPF82a, the 82b, one of them combination among the 85b, thereby generate the green narrow band of light that is limited in the green certain wavelengths wave band.The combination of each GLPF/GSPF in the light path of insertion broadband light BB is such shown in following (1)～(4) inserts morphosis by the four first～the 4th G.Insert form according to first～the 4th following G and generate half value fabric width or the four kinds of different narrow band of light Gn1 of green～Gn4 of centre wavelength.Said first～the 4th G inserts form and first～the 4th B insertion form likewise, is selected during apart from observing pattern first～the 4th respectively.
(1) the one G inserts form: the 2nd LPF82b, a SPF85a
(2) the 2nd G insert form: the 2nd LPF82b, the 2nd SPF85b
(3) the 3rd G insert form: a LPF82a, a SPF85a
(4) the 4th G insert form: a LPF82a, the 2nd SPF85b
The wavelength range of each green narrow band of light Gn1～Gn4 with two absorption peaks of the absorption spectrum of the light of hemoglobin near the corresponding mode of peak value (for example the 540nm) of long wavelength side adjusted.In addition, for each green narrow band of light Gn1～Gn4, because the half value fabric width is according to the order expansion of Gn1～Gn4, therefore if light quantity more separately then satisfies Gn1＜Gn2＜Gn3＜Gn4.
Opinion by relevant with the light scattering characteristic of bio-tissue can know, between near 500nm～600nm, especially between near 530nm～570nm, light arrives and is positioned at the mid-deep strata blood vessel that more leans on the deep than top layer blood vessel in the light wavelength of irradiation.This light is absorbed at the mid-deep strata blood vessel, and on the other hand by reflection of the bio-tissue of the periphery of mid-deep strata blood vessel and scattering.Therefore, when shining green narrow band of light Gn1～Gn4 to bio-tissue, the mid-deep strata blood vessel and around it contrast of bio-tissue uprise, therefore can stress demonstration mid-deep strata blood vessel etc. fully.In addition, wavelength range (half value fabric width) is big more, and then light quantity increases more, but then the contrast reduction of the middle level blood vessel bio-tissue peripheral with it.
Turntable rotating mechanism 81 carries out the action same with the turntable rotating mechanism of first embodiment 35 when common observing pattern.On the one hand; Turntable rotating mechanism 81 makes LPF/ SPF turntable 79,80 rotation when the special light observing pattern, so that insert one of them the corresponding BLPF/BSPF in the form with first～the 4th B and alternately insert in the light path of broadband light BB with one of them corresponding GLPF/GSPF that first～the 4th G inserts in the form.Thus, when the special light observing pattern, one of them among one of them among blue narrow band of light Bn1～Bn4 and the green narrow band of light Gn1～Gn4 alternately penetrates.In addition, the ejaculation of two narrow band of light is for example distributed the shooting of time quantum of 1 frame respectively during.
The tables of data 61 of the tables of data 87 and first embodiment is basic identical, will and respectively insert form and store accordingly apart from the scope of d, each sub-observing pattern.But, in tables of data 87, insert form with respect to inserting form and first～the 4th G apart from separately corresponding respectively first～the 4th B of the scope of d.
CPU88 carries out same with the CPU54 of first embodiment basically processing beyond the special light observing pattern.But CPU88 according to the kind of confirming sub-observing pattern apart from the judged result of judging part 57, and confirms that each B corresponding with confirming the result inserts form and each four G insertion form when the special light observing pattern.And CPU88 control turntable rotating mechanism 81 is so that insert the corresponding BLPF/BSPF of form with the B that confirms and alternately insert in the light path of broadband light BB with the corresponding GLPF/GSPF of G insertion form that confirms.
In addition, when the special light observing pattern,, therefore generate blue special light view data and green special light view data and store in the frame memory 56 because blue narrow band of light and green narrow band of light alternately penetrate.Display control circuit 58 makes the observation picture show at monitor 14 according to the special light view data of two colors of reading from frame memory 56.Thus, common demonstration top layer blood vessel and the mid-deep strata blood vessel stressed.
Next, utilize flow chart shown in Figure 24 that the effect of the endoscopic system 75 of the 3rd embodiment is described.In addition, the processing before switching to the special light observing pattern is identical with first embodiment shown in Figure 13, therefore omits explanation at this.
After the switching of special light observing pattern, CPU88 with sub-observing pattern be specified to as original state first apart from observing pattern.Next, CPU88 control turntable rotating mechanism 81 makes 79,80 rotations of LPF/SPF turntable so that the 2nd BLPF81b and a BSPF84a insert the interior mode of light path of broadband light BB.Thus, penetrate blue narrow band of light Bn1 from light supply apparatus 76.The ejaculation of the narrow band of light Bn1 of this blueness is carried out in only during the shooting of 1 frame.And, through to making a video recording in the detection bodies by the narrow band of light Bn1 of blueness illumination, thereby generating blue special light view data, the blue special light image of generation is stored in the frame memory 56.
Newly be stored in the blue special light view data judging distance d in the frame memory 56 apart from judging part 57 bases.In addition, at this moment, for example use the light exposure obtained in advance under the blue narrow band of light with apart from the tables of data of the relation of d etc.And CPU88 is for example keeping first apart from observing pattern apart from the judged result of judging part 57 during for " apart from d＜L1 ", and a G is inserted form confirm to insert form as G.
Next; At the ejaculation effluxion of the narrow band of light Bn1 of blueness during the shooting of time quantum of 1 frame of regulation the time; CPU88 control turntable rotating mechanism 81 makes 79,80 rotations of LPF/SPF turntable so that the 2nd GLPF82b and a GSPF85a insert the interior mode of light path of broadband light BB.
Shown in Figure 25 (A), (B); Through making broadband light BB successively through the 2nd GLPF82b, a GSPF85a; Thereby generating half value fabric width such shown in Figure 25 (C) is the green narrow band of light Gn1 of hg1, and the narrow band of light Gn1 of this green penetrates from light supply apparatus 76.Thus, generate green special light view data and store in the frame memory 56.
In addition, apart from judging part 57 according to the judged result of blue special light view data during for for example " apart from d >=L3 ", CPU88 confirms as sub-observing pattern apart from observing pattern the 4th, and the 4th G is inserted form confirm to insert form as G.At this moment, CPU88 control turntable rotating mechanism 81 makes 79,80 rotations of LPF/SPF turntable so that a GLPF82a and the 2nd GSPF85b insert the interior mode of light path of broadband light BB.
Shown in Figure 26 (A), (B); Through making broadband light BB successively through the 2nd GLPF82b, a GSPF85a; Thereby generate half value fabric width as Figure 26 (C) and be hg4 (＞hg1) green narrow band of light Gn4, and should the narrow band of light Gn4 of green from light supply apparatus 76 ejaculations.Thus, generate green special light view data and store in the frame memory 56.
Newly store the green special light view data judging distance d in the frame memory 56 into apart from judging part 57 bases.In addition, at this moment, for example use the light exposure obtained in advance under the green narrow band of light with apart from the tables of data of the relation of d etc.And CPU88 inserts morphology Control turntable rotating mechanism 81 according to this B and makes 79,80 rotations of LPF/SPF turntable according to confirming that apart from the judged result of judging part 57 sub-observing pattern and B insert form.Thus, the blue narrow band of light corresponding that penetrates blue narrow band of light Bn1～Bn4 from light supply apparatus 76 with sub-observing pattern.
Below likewise, based on judged result apart from judging part 57, from light supply apparatus 76 alternate repetitions penetrate green narrow band of light Gn1～Gn4 one of them with blue narrow band of light Bn1～Bn4 in one of them.Likewise, because along with the blue narrow band of light that penetrate from light supply apparatus 76 and the half value fabric width of green narrow band of light become big apart from d is elongated, therefore the light quantity to two narrow band of light of patient's pipe internal radiation increases in the 3rd embodiment.In addition, on the contrary, along with shortening apart from d, the blue narrow band of light that penetrates from light supply apparatus 76 and the half value fabric width of green narrow band of light narrow down, and therefore the light quantity to two narrow band of light of patient's pipe internal radiation reduces.Consequently, with first embodiment likewise, observe and the size apart from d of distant view observation etc. regardless of close shot, can both obtain good observation picture.
In above-mentioned the 3rd embodiment; When each blue special light view data and green special light view data store in the frame memory 56 respectively, carry out judgement, but carry out judgement for example also can store in the frame memory 56 a certain side in the two special light view data time apart from d apart from d.
In above-mentioned the 3rd embodiment, along with becoming big apart from d, blue narrow band of light and green this two side's of narrow band of light half value fabric width is expanded, but also can only make the half value fabric width expansion of arbitrary side's narrow band of light.
In above-mentioned the 3rd embodiment; Penetrate these two kinds of narrow band of light of blue narrow band of light and green narrow band of light; But also can increase the light filter number of LPF turntable and SPF turntable, for example penetrate the different trichroism above narrow band of light that comprises red narrow band of light.
In the above-mentioned first and the 3rd embodiment, be provided with the four kind first～the 4th apart from observing pattern as sub-observing pattern according to size apart from d, but also can increase the light filter number of LPF turntable and SPF turntable and be provided with more than four kinds apart from observing pattern.In addition, second embodiment also can likewise be provided with two or more apart from observing pattern.
In above-mentioned first～the 3rd embodiment, control the each several part of light supply apparatus through the CPU of processor device, but the control parts such as CPU of the said each several part of control also can be set on light supply apparatus.
In above-mentioned each embodiment, along with the half value fabric width expansion that makes narrow band of light apart from the increase of d, thereby the light quantity of narrow band of light is increased, but also can for example increase light quantity through the wavelength range expansion that makes narrow band of light.
Above-mentioned each embodiment detect light exposure apart from judging part 57 through luminance signal according to the special light view data, thereby judging distance d but can use the various known technologies beyond it to carry out the judgement apart from d.
In above-mentioned each embodiment; Carrying out the endoscopic system that the special light of top layer blood vessel or mid-deep strata blood vessel observes with the light that utilizes specific wavelength is that example is illustrated, but in the endoscopic system that the present invention also goes in Fluirescence observation (Auto Fluorescence Imaging) that the light that utilizes specific wavelength carries out, diagnosis various observations such as (Photodynamic diagnosis) that infrared light is observed (Infra Red Imaging), optical fiber mechanics, diagnosis, using.
Claims (9)
1. an endoscopic system is characterized in that,
Possess:
The broadband radiant, the broadband light of its outgoing white;
Short-pass wave filter unit, it has one or more short-pass wave filters that the light with the wavelength below the set upper limit wavelength in the said broadband light is passed through, and the upper limit wavelength of each short-pass wave filter has nothing in common with each other;
Long-pass wave filter unit, one or more long-pass wave filters that its light with the wavelength more than the lower limit wavelength with regulation that makes in the said broadband light passes through, and the lower limit wavelength of each long-pass wave filter has nothing in common with each other; And
Narrow band of light ejecting mechanism; Its according to the illumination light quantity make in said one or more short-pass wave filter at least one of them with said one or more long-pass wave filters in one of them inserts the light path of said broadband light at least, short-pass wave filter from insert said light path and long-pass wave filter penetrate the narrow band of light of provision wavelengths thus.
2. endoscopic system according to claim 1 is characterized in that,
Said short-pass wave filter unit has the mutually different a plurality of blue short-pass wave filters of upper limit wavelength,
Said long-pass wave filter unit has the mutually different a plurality of blue long-pass wave filters of lower limit wavelength,
Said narrow band of light ejecting mechanism according to the illumination light quantity make in said a plurality of blue short-pass wave filter at least one of them with said a plurality of blue long-pass wave filters in one of them inserts in the light path of said broadband light at least, blue short-pass wave filter from insert said light path and blue long-pass wave filter penetrate blue narrow band of light thus.
3. endoscopic system according to claim 2 is characterized in that,
Said illumination light quantity is corresponding with the half value fabric width of the narrow band of light of said blueness, and is far away more with the distance of look-out station, and the half value fabric width of the narrow band of light of then said blueness is big more.
4. endoscopic system according to claim 1 is characterized in that,
Said short-pass wave filter unit has a blue short-pass wave filter,
Said long-pass wave filter unit has the mutually different a plurality of blue long-pass wave filters of lower limit wavelength,
Said narrow band of light ejecting mechanism according to the illumination light quantity make in a said blue short-pass wave filter and the said a plurality of blue long-pass wave filter one of them inserts in the light path of said broadband light at least, blue short-pass wave filter from insert said light path and blue long-pass wave filter penetrate blue narrow band of light thus.
5. endoscopic system according to claim 4 is characterized in that,
Said illumination light quantity is corresponding with the half value fabric width of the narrow band of light of said blueness, and is far away more with the distance of look-out station, and the half value fabric width of the narrow band of light of then said blueness is only big more at short wavelength side.
6. endoscopic system according to claim 1 is characterized in that,
Said short-pass wave filter unit has mutually different a plurality of blue short-pass wave filters of upper limit wavelength and the mutually different a plurality of green short-pass wave filters of upper limit wavelength,
Said long-pass wave filter unit has mutually different a plurality of blue long-pass wave filters of lower limit wavelength and the mutually different a plurality of green long-pass wave filters of lower limit wavelength,
Said narrow band of light ejecting mechanism first insert make according to the illumination light quantity constantly in said a plurality of blue short-pass wave filter at least one of them with said a plurality of blue long-pass wave filters in one of them inserts in the light path of said broadband light at least; Blue short-pass wave filter from insert said light path and blue long-pass wave filter penetrate blue narrow band of light thus
Inserting the second constantly different insertions constantly with said first; Said narrow band of light ejecting mechanism through make in said a plurality of green short-pass wave filter at least one of them with said a plurality of green long-pass wave filters in one of them inserts in the light path of said broadband light at least, green short-pass wave filter from insert said light path and green long-pass wave filter penetrate green narrow band of light thus.
7. endoscopic system according to claim 6 is characterized in that,
Said illumination light quantity is corresponding with the half value fabric width of narrow band of light of said blueness and the narrow band of light of said green, and is far away more with the distance of look-out station, and the half value fabric width of narrow band of light of then said blueness and the narrow band of light of said green is big more.
8. endoscopic system according to claim 6 is characterized in that,
The high wavelength range of the absorption coefficient of light that narrow band of light of said blueness and green narrow band of light have blood hemoglobin respectively.
9. endoscopic system according to claim 1 is characterized in that,
In the said narrow band of light ejecting mechanism through change inserting short-pass wave filter and the combination of long-pass wave filter in the said light path, thereby change the centre wavelength of said narrow band of light.
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Also Published As
| Publication number | Publication date |
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| JP5271364B2 (en) | 2013-08-21 |
| JP2012143302A (en) | 2012-08-02 |
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