CA2207678A1 - Angled beam delivery handpiece for laser or other monochromatic light source - Google Patents
Angled beam delivery handpiece for laser or other monochromatic light sourceInfo
- Publication number
- CA2207678A1 CA2207678A1 CA002207678A CA2207678A CA2207678A1 CA 2207678 A1 CA2207678 A1 CA 2207678A1 CA 002207678 A CA002207678 A CA 002207678A CA 2207678 A CA2207678 A CA 2207678A CA 2207678 A1 CA2207678 A1 CA 2207678A1
- Authority
- CA
- Canada
- Prior art keywords
- barrel
- handpiece
- contact surface
- prism
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B18/201—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser with beam delivery through a hollow tube, e.g. forming an articulated arm ; Hand-pieces therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00238—Type of minimally invasive operation
- A61B2017/00243—Type of minimally invasive operation cardiac
- A61B2017/00247—Making holes in the wall of the heart, e.g. laser Myocardial revascularization
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00345—Vascular system
- A61B2018/00351—Heart
- A61B2018/00392—Transmyocardial revascularisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B2018/2015—Miscellaneous features
- A61B2018/2025—Miscellaneous features with a pilot laser
Abstract
An angled beam delivery handpiece (20) includes a barrel (22) for delivering a monochromatic light beam; a contact surface (24) at the distal end of the barrel (22); a window (32) in the side of the barrel (22) proximate the contact surface (24); an aperture (26) in the contact surface (22); and a refractive element in the barrel above the window (32) for diverting the beam carried by the barrel (22) to exit the aperture (26) at an angle to the laser beam in the barrel (22).
Description
W O 97115235 PCTAUS96tI6I35 ANGLED BEAM DELIVERY HANDPIECE FOR LASER OR
OTHER MONOCHROMATIC LIGHI SOURCE
FIELD OF INVENTION
This invention relates to an angled beam delivery handpiece for a laser or othermnnn~h.~oll,alic light source, and more particularly to such a halld~iece for di~.Lillg a laser beam in a surgical laser.
BACKGROUND OF INVENTION
In laser surgery, such as lla~ yocardial revascularization, it is often desirable to have the laser beam exit the handpiece at some angle other than 0~, for example, 15~, 20~, 30~, 45~, 90~. Redirection or diversion of the laser beam at 90~ or thereabouts can be achic~.,d with a mirror but as the ~ ioll angle ~ ni~ s the mirror lc~luired bec~m~s larger and larger to accommo-l~t~ the inri~l~nt area of the beam. This nPcçs~ es a larger and larger mirror or reflector in the len~ Lhwise direction, i.e., along the laser beam direction which results in the mirror coming close or even touching the heart wall or other part of the patient to be serviced. That subjects the mirror to greater potential of c~ n from body fluids and the ablative e~ch~nst from the laser-struck heart tissue or other tissue.
- SUMMAR~ OF INVENTION
It is therefore an object of this invention to provide an improved angled beam delivery handpiece for a laser such as a surgical laser or other m-)no(~l-.o"~ ic light source.
It is a further object of this invention to provide such an hll~roved angled beam delivery handpiece which is co~ a~;l and elimin~tes the need for çlong~tçd reflecting means.
It is a further object of this invention to provide such an improved angled beamdcli~ handpiece which is adjustable over a range of beam delivery angles.
It is a further object of this invention to provide such an hl~loved angled beamdelivery handpiece which can divert both the surgical laser beam and a second beam of dirr~.enl wavele~lll but con~ ,e them on the same target area.
SUBSTITUTE SHEET (RULE 26) WO 97/15235 PCT~US96/16135 It is a fur~er object of this invention to provide such an il~rovt;d angled delivery hau~piece which avoids close proximity of the div~-lhlg optics to the heart or other body parts.
The invention results from the reAli7~tion that a simple, rugged ha~ ;cce for delivery of a diverted laser beam or other monocl)wl-lalic beam can be achieved without enlarged, angled ll~irlul~ by using a n_L dclive elom~nt to divert the beam to the desired angle.
This invention realu.~,s an angled beam-delivery handpiece. There is a barrel for delivering a mon~cl~n"llalic light beam, a contact surface at the distal end of the barrel, a window in the side of the barrel ~lu~ dle the contact surface, an a~c~ , in the contact surface. A refractive çl~m~nt in the barrel above the window diverts the beam carried by the barrel to exit the a~l lLule at an angle to the laser beam in the barrel.
In a pl~f~ ,d embodiment the contact surface may be ~ en~l;r~ r to the diverted beam. The contact surface may be "U" shaped, the a~ lul., may open on one side and the contact surface may be elong~tf~l, being sl~bstAnti~lly the same width as the barrel in the direction across the "U" shape and longer than the barrel width in the transverse direction. The refractive e~em~nt may include an optical prism and the optical prism may include two relatively rotatable section~ for varying the diversion angle of the beam. The optical prism may also include a dichroic prism for diverting the beam and a second beam of dirr~f~ l wavclc~lll to the same target area.
I)ISCLQSURE OF PREFERRED EMBODIMENT
Other objects, ÇedlLu~s and advantages will occur to those skilled in the art from the following d~ ion of a ~lerel~,d emborlim~ont and the Arcfi...l~A~.ying drawings, in which:
Fig. I is a three~ xil n~1 view of a laser system which utilizes the handpiece of this invention;
Fig. 2 is an enlarged, more det~ d, exploded three--limPn~ional view of a portion of the arti~ tf~l arm in Fig. 1 and a conventionAl hall~iecc;
Fig. 3 is a three-f~ ionAl partially secti~)nAl diaglA.-..-.AIi~ view of a hal~slL~iece accolding to this invention;
CA 02207678 l997-06-l3 W O 97/1~235 PCT~US96/16135 Fig. 4 is a sch ~ c ray di~r~m showing the ~ ,t~ co~ Qred in the rer,dcLi-~e rlemrnt used to divert the beam in the handpiece of Fig. 3;
Fig. 5 is a sçh~ c diagram of a prism similar to that shown in Figs. 3 and 4 having two mntu~11y rotatable se~ ..c for varying the diversion angle of the beam;
Fig. 6 is a srhPm~tir diagram of the two prisms shown fully rotated 180~ out of phase where the beam ~ ioll is zero; and Fig. 7 is a cross-sectional s~ ;r diagram of a portion of a ha~ icce showing the ~,~fcl~A~ for rotating the two prism sections relative to one another;
Fig. 7A is an enlarged more ~l~t~il~l view of the gripping ring and ~csoci~te~
assembly of Fig. 7;
Fig. 8 is a srl.f-~ ;r, ray ~ gr~m of a dichroic prism which diverts two beams of two dirr~,re.,l wavel~n~h~ but coll~,e~s them on the same target;
Fig. 9 is a srh~m~tir, side elevational view of a portion of the handpiece showing an ~ 1;v~ embo~lim~nt of the invention using a grating on the prism surface for div~ g the HeNe and CO2 beams and con~ ;ing them on the same target; and Fig. 10 is an .-~r~n~ view of the grating of Fig. 9.
There is shown in Fig. 1 a surgical laser system 10 which in~ des a power supplyand control 12 ~.;,~.led through control and monitor screen 14 to operate laser 16. The output from laser 16 is directed through ar~irul~trcl arm 18 to handpiece 20 typically held by the ~ or sulgeon to direct the beam at the desired target. ~n-lpjçce 20 inrllll(les an enlarged threaded portion 23 for con~ n to articul~trd arm 18 and a barrel 22 at the end of which is contact surface 24 which for example c~ the heart of the patient on which l~ yocardial rev~c~ ri7~ti- n is being ~.,.r lllled. There is an apc.lule 26 in contact surface 24 through which beam 28 exits to strike the heart. A lens 30, shown in ph~nt--m, in barrel 22 focuses laser beam 28 at a pre~lcle- ..-i.~ (li~t~nce typically at the contact surface 22. Barrel 22 also inrlu~ s a side window 32 through which the user can view the beam as it enters a~c.lur~, 26. Window 32 also acts as a venting hole for the ablali~e plume which rises from the heart or other tissue struck by the laser beam 28.
In accol~ce with this in~e llion han~iece 20a, Fig. 3, inrhl~1es barrel 22a which in-~ln~es a similar connection portion 23a and lens 30a. lEIowever, in the lower portion of W O 97/15235 ' PCT~US96/16135 the barrel just above window 32a is prism 40 which diverts laser beam 28a res~1tin~ in the diverted beam 28aa which exits through aycl~ul~ 26a in contact surface 24a. In this particular embo~1im~nt a~c~Lul~, 26a is open at one end 42 and contact surface 24a is formed in the shape of a "U". Specifically, contact surface 24a is ~lo~ ly the same width as the barrel in the direction across the legs of the "U" and is ek ng~te~l in the orthogonal direction in order to f~rilit5~t~ its insertion titl~ ,en human ribs without undue spreading of the ribs. The particular angle of diversion d is ~lcl~ - ".i~rrl, among other things, by the angle of the prism, B, and the index of refraction of the m~trri~l from which the prism is made. For example, for a diversion angle d of 30~ in Fig. 3, the B
angle of prism 40 would be 18~ if the material were zinc se~ ni~le having a lcrlacli~e index of 2.403 and the laser beam were a CO2 laser beam having a wavclc~lh 10.6,u.
The prism can be ~lr~ignrd begi~ with the e~ ssion d = ~1+~2~
where d is the diversion angle, ~l is the angle that the incollli,lg laser bea~ l, Fig. 4, makes with the normal to the surface of the prism, and ~2iS the angle that the di~ lg laser beam makes with the normal to the exiting surface. ~', is the diversion angle of the laser beam leaving the first face intrrn~l to the prism and normal to the entrance surface.
t12 iS then c~lr,~ ted according to the S;~rc~;,ion ~2 = sin~l [nsin ( ~) -~1/] (2 ) ~'~ is c~lrlll~te.~l accu~ ,g to the e~ i,sion a' = sin~1( 1sinO1) (3) and the index of refraction in this case is 2.403 for zinc se~eni~
If it is desired to be able to vary the range of the diversion angle so that theop~ lor for exarnple can divert the laser bearn from zero to 30~ at his elPction~ the prism can be divided into two sectirn~. For example, prism 40a, Fig. 5, could be divided into two sections 42 and 44 each having a B of 9~. Then when the two se~;l;ot~ 42 and 44 are -- WO 97115235 PC'r/US96fl613 rotated ~ lali~e to one another the diversion angle d will vary b~t~ n zero and 30~.
When the two prisms are aligned as shown in Fig. S, the diversion angle d is 30~. When they are totally out of phase with one another, as shown in Fig. 6, then the diversion angle will be zero.
The relative rotation between prism section.C 42 and 44 can be accomplished withthe mPcl~ -- shown in Fig. 7, where it is shown t_at barrel 22b of ~iece 20b inrlllde,q int~rn~l bore 50 that rec~ s a rotatable inner tube 52. Prism section 44 is ~tt~rhP~1 by adhesive 54 to barrel 22b; prism section 42 is ~tt~rh~l by adhesive 56 to the inner tube 52 that is rotatable with respect to barrel 22b. The position of the undiverted beam 28aa at 0~ is shown in ~h~ ... Iine while the beam diverted to the full 30~ is shown at 28'aa. Also shown in Fig. 7 is the contact surface 26a disposed at an angle to the original laser beam 28a and generally normal to the m~xim~lly diverted exiting beam at 30~. Although prism 40 is shown divided into two equal portions 42 and 44, this is not a n-oceS~ry limit~tif)n of the invention. The sections may be nn~q11~1 so that instead of 50% each tbey are divided 60%-40%, 70%-30%, or any other ratio. However, whenthe sections are not equally divided the full range of 0-30~ will not be obtained; the range will be ~1;,"i~ d in accold~ce with the ratio. Although the example in this embodiment is of a 30~ m; xi-------- diversion of the beam this is not a ~-~cçs~-y 1i-~ ion of the invention as the prism can be c~lY11~te~1 for any desired angle of diversion, taking into account the wavelength and index of refraction re4uh~ L. A gripping ring 60 on the outside of barrel 22b can be gripped by the user to rotate barrel 22b relative to inner tube 52 which is fixedly ~tt~rll'od to the threaded conn~octil~n portion 23a of handpiece 20b.
The counter-rotation of the two prisms will divert the optical path of the L~ ed beam in an arc, so that the focal point will travel in a radius "R", Fig. 7, from appro~ ly the center of the two prisms. The contact surface then must also be curved about this radius to provide a surface that will be normal to the target tissue.
The contact surface will have to remain fixed, relative to the counter-lvlalh~g f prisms, so that each degree of rotation of one prism in ~lalion to the contact surface is m~tl~hed by the opposing prism rotation in the o~osil~ direction. This can be ~-co...p1i~hed in Fig. 7 by conntocting the contact surface 24aa to an outer tube 80 which W O 97/15235 PCT~US96/16135 can rotate about the middle tube 22b, and ~ s in another gli~illg ring 70.
The ~lignm~nt of the three components (two prisms and contact surface) can then be ~ccomrlished by ali~ing degree inrlir~ti-)n~ 72 and 76 on the outside surface of the respective gripping rings 23a and 70, Fig. 7A, with ~li~m~ont rnark 74 on gripping ring 60. Quarter turns of ring 23a would then C13111~al~, with 1/8 turns of ring 70 in the same direction, relative to 60.
In some applirn~;o..~ it is ~rc~ y to ~cco~ tç two laser beams or monocl~olllalic beams of dir~e.ll wavelength~, divert both of them by the same amount and have them strike the same target area. For example, in one CO2 surgical laser there is a~o~ ying it a helium neon laser (HeNe) which provides a red light that can be easily seen to aim the device before the CO2 beam is ene.gi;Ged. To accolllplish this double diversion a dichroic prism 70, Fig. 8, may be used. Prism 70 would thus have two sections, 72 and 74 which are fixed with respect to one another but have diLrcr~l indexes of l~ rla;lion for the CO2 and HeNe laser beam wavelen~h~. For example, prism section 72 would have a first index of refraction Nc for the CO2 wavcle~lll and a dirr~lc.ll index of refraction NH for the HeNe wavelen~th, while the second prism section 74 would have an index of rerla~;lioll N'C for the CO2 wavelength which would differ from the index of refra~ tion of that w~v.,lcngth Nc in prism 72. Likewise index of refraction NIH of prism 74 would differ from the index of rerla.ilion NH for the HeNe laser wavelength in prism 72. In this way each beam is diverted dif~lc.l~ly by the desired amount, through each se~dlale cl~ ~"~ 7 72 and 74, and yet they recombine as shown at 76 to strike the same target area 78. This con~ r~ti~m could be accomplished with more than just two rl~
In another configuration, the HeNe beam 78 and CO2 beam 28 can be diverted but made to converge on the same target by illcol~uld~ g an optical grating 100, Fig. 9, on surface 102 of prism 40b so that the grating is ll~ ul to the wavelellglh of the CO2 laser beam 28 but refracts the wavelength of the HeNe laser beam 78. This results in a m~t h~ output l~L.aclive angle for both wav~le--g~ and coll~c.ges them on the same target. Such a grating would be etched or scribed into the surface of the prism, as shown in Figs. 9 and 10.
Although specific r~Lules of this invention are shown in some drawings and not W O 97115235 PCTAUS96~6135 others, this is for col~vel~ie~cc only as each feature may be co...h;..~l with any or all of the other f~dLule~ in accold~ce with the invention.
Other embo~ will occur to those skilled in the art and are within the following claims:
OTHER MONOCHROMATIC LIGHI SOURCE
FIELD OF INVENTION
This invention relates to an angled beam delivery handpiece for a laser or othermnnn~h.~oll,alic light source, and more particularly to such a halld~iece for di~.Lillg a laser beam in a surgical laser.
BACKGROUND OF INVENTION
In laser surgery, such as lla~ yocardial revascularization, it is often desirable to have the laser beam exit the handpiece at some angle other than 0~, for example, 15~, 20~, 30~, 45~, 90~. Redirection or diversion of the laser beam at 90~ or thereabouts can be achic~.,d with a mirror but as the ~ ioll angle ~ ni~ s the mirror lc~luired bec~m~s larger and larger to accommo-l~t~ the inri~l~nt area of the beam. This nPcçs~ es a larger and larger mirror or reflector in the len~ Lhwise direction, i.e., along the laser beam direction which results in the mirror coming close or even touching the heart wall or other part of the patient to be serviced. That subjects the mirror to greater potential of c~ n from body fluids and the ablative e~ch~nst from the laser-struck heart tissue or other tissue.
- SUMMAR~ OF INVENTION
It is therefore an object of this invention to provide an improved angled beam delivery handpiece for a laser such as a surgical laser or other m-)no(~l-.o"~ ic light source.
It is a further object of this invention to provide such an hll~roved angled beam delivery handpiece which is co~ a~;l and elimin~tes the need for çlong~tçd reflecting means.
It is a further object of this invention to provide such an improved angled beamdcli~ handpiece which is adjustable over a range of beam delivery angles.
It is a further object of this invention to provide such an hl~loved angled beamdelivery handpiece which can divert both the surgical laser beam and a second beam of dirr~.enl wavele~lll but con~ ,e them on the same target area.
SUBSTITUTE SHEET (RULE 26) WO 97/15235 PCT~US96/16135 It is a fur~er object of this invention to provide such an il~rovt;d angled delivery hau~piece which avoids close proximity of the div~-lhlg optics to the heart or other body parts.
The invention results from the reAli7~tion that a simple, rugged ha~ ;cce for delivery of a diverted laser beam or other monocl)wl-lalic beam can be achieved without enlarged, angled ll~irlul~ by using a n_L dclive elom~nt to divert the beam to the desired angle.
This invention realu.~,s an angled beam-delivery handpiece. There is a barrel for delivering a mon~cl~n"llalic light beam, a contact surface at the distal end of the barrel, a window in the side of the barrel ~lu~ dle the contact surface, an a~c~ , in the contact surface. A refractive çl~m~nt in the barrel above the window diverts the beam carried by the barrel to exit the a~l lLule at an angle to the laser beam in the barrel.
In a pl~f~ ,d embodiment the contact surface may be ~ en~l;r~ r to the diverted beam. The contact surface may be "U" shaped, the a~ lul., may open on one side and the contact surface may be elong~tf~l, being sl~bstAnti~lly the same width as the barrel in the direction across the "U" shape and longer than the barrel width in the transverse direction. The refractive e~em~nt may include an optical prism and the optical prism may include two relatively rotatable section~ for varying the diversion angle of the beam. The optical prism may also include a dichroic prism for diverting the beam and a second beam of dirr~f~ l wavclc~lll to the same target area.
I)ISCLQSURE OF PREFERRED EMBODIMENT
Other objects, ÇedlLu~s and advantages will occur to those skilled in the art from the following d~ ion of a ~lerel~,d emborlim~ont and the Arcfi...l~A~.ying drawings, in which:
Fig. I is a three~ xil n~1 view of a laser system which utilizes the handpiece of this invention;
Fig. 2 is an enlarged, more det~ d, exploded three--limPn~ional view of a portion of the arti~ tf~l arm in Fig. 1 and a conventionAl hall~iecc;
Fig. 3 is a three-f~ ionAl partially secti~)nAl diaglA.-..-.AIi~ view of a hal~slL~iece accolding to this invention;
CA 02207678 l997-06-l3 W O 97/1~235 PCT~US96/16135 Fig. 4 is a sch ~ c ray di~r~m showing the ~ ,t~ co~ Qred in the rer,dcLi-~e rlemrnt used to divert the beam in the handpiece of Fig. 3;
Fig. 5 is a sçh~ c diagram of a prism similar to that shown in Figs. 3 and 4 having two mntu~11y rotatable se~ ..c for varying the diversion angle of the beam;
Fig. 6 is a srhPm~tir diagram of the two prisms shown fully rotated 180~ out of phase where the beam ~ ioll is zero; and Fig. 7 is a cross-sectional s~ ;r diagram of a portion of a ha~ icce showing the ~,~fcl~A~ for rotating the two prism sections relative to one another;
Fig. 7A is an enlarged more ~l~t~il~l view of the gripping ring and ~csoci~te~
assembly of Fig. 7;
Fig. 8 is a srl.f-~ ;r, ray ~ gr~m of a dichroic prism which diverts two beams of two dirr~,re.,l wavel~n~h~ but coll~,e~s them on the same target;
Fig. 9 is a srh~m~tir, side elevational view of a portion of the handpiece showing an ~ 1;v~ embo~lim~nt of the invention using a grating on the prism surface for div~ g the HeNe and CO2 beams and con~ ;ing them on the same target; and Fig. 10 is an .-~r~n~ view of the grating of Fig. 9.
There is shown in Fig. 1 a surgical laser system 10 which in~ des a power supplyand control 12 ~.;,~.led through control and monitor screen 14 to operate laser 16. The output from laser 16 is directed through ar~irul~trcl arm 18 to handpiece 20 typically held by the ~ or sulgeon to direct the beam at the desired target. ~n-lpjçce 20 inrllll(les an enlarged threaded portion 23 for con~ n to articul~trd arm 18 and a barrel 22 at the end of which is contact surface 24 which for example c~ the heart of the patient on which l~ yocardial rev~c~ ri7~ti- n is being ~.,.r lllled. There is an apc.lule 26 in contact surface 24 through which beam 28 exits to strike the heart. A lens 30, shown in ph~nt--m, in barrel 22 focuses laser beam 28 at a pre~lcle- ..-i.~ (li~t~nce typically at the contact surface 22. Barrel 22 also inrlu~ s a side window 32 through which the user can view the beam as it enters a~c.lur~, 26. Window 32 also acts as a venting hole for the ablali~e plume which rises from the heart or other tissue struck by the laser beam 28.
In accol~ce with this in~e llion han~iece 20a, Fig. 3, inrhl~1es barrel 22a which in-~ln~es a similar connection portion 23a and lens 30a. lEIowever, in the lower portion of W O 97/15235 ' PCT~US96/16135 the barrel just above window 32a is prism 40 which diverts laser beam 28a res~1tin~ in the diverted beam 28aa which exits through aycl~ul~ 26a in contact surface 24a. In this particular embo~1im~nt a~c~Lul~, 26a is open at one end 42 and contact surface 24a is formed in the shape of a "U". Specifically, contact surface 24a is ~lo~ ly the same width as the barrel in the direction across the legs of the "U" and is ek ng~te~l in the orthogonal direction in order to f~rilit5~t~ its insertion titl~ ,en human ribs without undue spreading of the ribs. The particular angle of diversion d is ~lcl~ - ".i~rrl, among other things, by the angle of the prism, B, and the index of refraction of the m~trri~l from which the prism is made. For example, for a diversion angle d of 30~ in Fig. 3, the B
angle of prism 40 would be 18~ if the material were zinc se~ ni~le having a lcrlacli~e index of 2.403 and the laser beam were a CO2 laser beam having a wavclc~lh 10.6,u.
The prism can be ~lr~ignrd begi~ with the e~ ssion d = ~1+~2~
where d is the diversion angle, ~l is the angle that the incollli,lg laser bea~ l, Fig. 4, makes with the normal to the surface of the prism, and ~2iS the angle that the di~ lg laser beam makes with the normal to the exiting surface. ~', is the diversion angle of the laser beam leaving the first face intrrn~l to the prism and normal to the entrance surface.
t12 iS then c~lr,~ ted according to the S;~rc~;,ion ~2 = sin~l [nsin ( ~) -~1/] (2 ) ~'~ is c~lrlll~te.~l accu~ ,g to the e~ i,sion a' = sin~1( 1sinO1) (3) and the index of refraction in this case is 2.403 for zinc se~eni~
If it is desired to be able to vary the range of the diversion angle so that theop~ lor for exarnple can divert the laser bearn from zero to 30~ at his elPction~ the prism can be divided into two sectirn~. For example, prism 40a, Fig. 5, could be divided into two sections 42 and 44 each having a B of 9~. Then when the two se~;l;ot~ 42 and 44 are -- WO 97115235 PC'r/US96fl613 rotated ~ lali~e to one another the diversion angle d will vary b~t~ n zero and 30~.
When the two prisms are aligned as shown in Fig. S, the diversion angle d is 30~. When they are totally out of phase with one another, as shown in Fig. 6, then the diversion angle will be zero.
The relative rotation between prism section.C 42 and 44 can be accomplished withthe mPcl~ -- shown in Fig. 7, where it is shown t_at barrel 22b of ~iece 20b inrlllde,q int~rn~l bore 50 that rec~ s a rotatable inner tube 52. Prism section 44 is ~tt~rhP~1 by adhesive 54 to barrel 22b; prism section 42 is ~tt~rh~l by adhesive 56 to the inner tube 52 that is rotatable with respect to barrel 22b. The position of the undiverted beam 28aa at 0~ is shown in ~h~ ... Iine while the beam diverted to the full 30~ is shown at 28'aa. Also shown in Fig. 7 is the contact surface 26a disposed at an angle to the original laser beam 28a and generally normal to the m~xim~lly diverted exiting beam at 30~. Although prism 40 is shown divided into two equal portions 42 and 44, this is not a n-oceS~ry limit~tif)n of the invention. The sections may be nn~q11~1 so that instead of 50% each tbey are divided 60%-40%, 70%-30%, or any other ratio. However, whenthe sections are not equally divided the full range of 0-30~ will not be obtained; the range will be ~1;,"i~ d in accold~ce with the ratio. Although the example in this embodiment is of a 30~ m; xi-------- diversion of the beam this is not a ~-~cçs~-y 1i-~ ion of the invention as the prism can be c~lY11~te~1 for any desired angle of diversion, taking into account the wavelength and index of refraction re4uh~ L. A gripping ring 60 on the outside of barrel 22b can be gripped by the user to rotate barrel 22b relative to inner tube 52 which is fixedly ~tt~rll'od to the threaded conn~octil~n portion 23a of handpiece 20b.
The counter-rotation of the two prisms will divert the optical path of the L~ ed beam in an arc, so that the focal point will travel in a radius "R", Fig. 7, from appro~ ly the center of the two prisms. The contact surface then must also be curved about this radius to provide a surface that will be normal to the target tissue.
The contact surface will have to remain fixed, relative to the counter-lvlalh~g f prisms, so that each degree of rotation of one prism in ~lalion to the contact surface is m~tl~hed by the opposing prism rotation in the o~osil~ direction. This can be ~-co...p1i~hed in Fig. 7 by conntocting the contact surface 24aa to an outer tube 80 which W O 97/15235 PCT~US96/16135 can rotate about the middle tube 22b, and ~ s in another gli~illg ring 70.
The ~lignm~nt of the three components (two prisms and contact surface) can then be ~ccomrlished by ali~ing degree inrlir~ti-)n~ 72 and 76 on the outside surface of the respective gripping rings 23a and 70, Fig. 7A, with ~li~m~ont rnark 74 on gripping ring 60. Quarter turns of ring 23a would then C13111~al~, with 1/8 turns of ring 70 in the same direction, relative to 60.
In some applirn~;o..~ it is ~rc~ y to ~cco~ tç two laser beams or monocl~olllalic beams of dir~e.ll wavelength~, divert both of them by the same amount and have them strike the same target area. For example, in one CO2 surgical laser there is a~o~ ying it a helium neon laser (HeNe) which provides a red light that can be easily seen to aim the device before the CO2 beam is ene.gi;Ged. To accolllplish this double diversion a dichroic prism 70, Fig. 8, may be used. Prism 70 would thus have two sections, 72 and 74 which are fixed with respect to one another but have diLrcr~l indexes of l~ rla;lion for the CO2 and HeNe laser beam wavelen~h~. For example, prism section 72 would have a first index of refraction Nc for the CO2 wavcle~lll and a dirr~lc.ll index of refraction NH for the HeNe wavelen~th, while the second prism section 74 would have an index of rerla~;lioll N'C for the CO2 wavelength which would differ from the index of refra~ tion of that w~v.,lcngth Nc in prism 72. Likewise index of refraction NIH of prism 74 would differ from the index of rerla.ilion NH for the HeNe laser wavelength in prism 72. In this way each beam is diverted dif~lc.l~ly by the desired amount, through each se~dlale cl~ ~"~ 7 72 and 74, and yet they recombine as shown at 76 to strike the same target area 78. This con~ r~ti~m could be accomplished with more than just two rl~
In another configuration, the HeNe beam 78 and CO2 beam 28 can be diverted but made to converge on the same target by illcol~uld~ g an optical grating 100, Fig. 9, on surface 102 of prism 40b so that the grating is ll~ ul to the wavelellglh of the CO2 laser beam 28 but refracts the wavelength of the HeNe laser beam 78. This results in a m~t h~ output l~L.aclive angle for both wav~le--g~ and coll~c.ges them on the same target. Such a grating would be etched or scribed into the surface of the prism, as shown in Figs. 9 and 10.
Although specific r~Lules of this invention are shown in some drawings and not W O 97115235 PCTAUS96~6135 others, this is for col~vel~ie~cc only as each feature may be co...h;..~l with any or all of the other f~dLule~ in accold~ce with the invention.
Other embo~ will occur to those skilled in the art and are within the following claims:
Claims (8)
1. An angled beam-delivery handpiece comprising:
a barrel for delivering a monochromatic light beam;
a contact surface at the distal end of said barrel;
a window in the side of said barrel proximate said contact surface;
an aperture in said contact surface; and a refractive element in said barrel above said window for diverting the beam carried by said barrel to exit said aperture at an angle to the laser beam in said barrel.
a barrel for delivering a monochromatic light beam;
a contact surface at the distal end of said barrel;
a window in the side of said barrel proximate said contact surface;
an aperture in said contact surface; and a refractive element in said barrel above said window for diverting the beam carried by said barrel to exit said aperture at an angle to the laser beam in said barrel.
2. The handpiece of claim 1 in which said contact surface is perpendicular to the diverted beam.
3. The handpiece of claim 1 in which said contact surface is "U"
shaped.
shaped.
4. The handpiece of claim 3 in which said aperture is open on one side.
5. The handpiece of claim 1 in which said contact surface is elongated, being substantially the same width as the barrel in the direction across the "U" shape and longer than said barrel width in the transverse direction.
6. The handpiece of claim 1 in which said refractive element includes an optical prism.
7. The handpiece of claim 6 in which said optical prism includes two relatively rotatable sections for varying the diversion angle of the beam.
8. The handpiece of claim 1 in which said optical prisms includes a dichroic prism for diverting the beam and a second beam of different wavelength to the same target area.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/548,269 US5591161A (en) | 1995-10-25 | 1995-10-25 | Angled beam delivery handpiece for laser or other monochromatic light source |
| US548,269 | 1995-10-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2207678A1 true CA2207678A1 (en) | 1997-05-01 |
Family
ID=24188099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002207678A Abandoned CA2207678A1 (en) | 1995-10-25 | 1996-10-09 | Angled beam delivery handpiece for laser or other monochromatic light source |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5591161A (en) |
| EP (1) | EP0798989A1 (en) |
| JP (1) | JPH10500608A (en) |
| AU (1) | AU7261996A (en) |
| CA (1) | CA2207678A1 (en) |
| WO (1) | WO1997015235A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6690963B2 (en) | 1995-01-24 | 2004-02-10 | Biosense, Inc. | System for determining the location and orientation of an invasive medical instrument |
| US5807383A (en) * | 1996-05-13 | 1998-09-15 | United States Surgical Corporation | Lasing device |
| US6283955B1 (en) | 1996-05-13 | 2001-09-04 | Edwards Lifesciences Corp. | Laser ablation device |
| WO1998018394A1 (en) * | 1996-10-30 | 1998-05-07 | Plc Medical Systems, Inc. | Variable angle surgical laser handpiece |
| US5976124A (en) * | 1998-01-05 | 1999-11-02 | Spectranetics Corporation | Phototherapy device and method |
| US6135996A (en) * | 1998-04-17 | 2000-10-24 | Baxter International, Inc. | Controlled advancement lasing device |
| US6263880B1 (en) | 1998-06-22 | 2001-07-24 | Neovasys, Inc. | Method of enhancing blood flow in tissue |
| US20020107510A1 (en) * | 2001-02-05 | 2002-08-08 | Andrews Robert R. | Laser apparatus useful for myocardial revascularization |
| DE10225347B4 (en) * | 2001-06-14 | 2006-05-24 | Mobillasertec Gmbh | Device for laser processing |
| EP2477569B1 (en) * | 2009-09-14 | 2018-10-24 | Memorial Sloan-Kettering Cancer Center | APPARATUS and SYSTEM FOR PROVIDING LASER STEERING AND FOCUSING FOR INCISION, EXCISION AND ABLATION OF TISSUE IN MINIMALLY-INVASIVE SURGERY |
| US8870858B2 (en) * | 2009-11-18 | 2014-10-28 | Boston Scientific Scimed, Inc. | Methods and apparatus related to a side-fire assembly that has an optical grating |
| US9622819B2 (en) | 2010-04-22 | 2017-04-18 | Precise Light Surgical, Inc. | Flash vaporization surgical systems |
| AU2013231978A1 (en) | 2012-03-14 | 2014-10-02 | Memorial Sloan Kettering Cancer Center | Apparatus, system and method for providing laser steering and focusing for incision, excision and ablation of tissue in minimally-invasive surgery |
| EP3600110A4 (en) | 2017-03-20 | 2020-09-16 | Precise Light Surgical, Inc. | Soft tissue selective ablation surgical systems |
| KR102108530B1 (en) * | 2017-11-23 | 2020-05-13 | 경북대학교 산학협력단 | Implant handpiece |
| WO2023217915A1 (en) * | 2022-05-10 | 2023-11-16 | Solta Medical Ireland Limited | Devices for applying electromagnetic energy with prismatic beam steering |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2826383A1 (en) * | 1978-06-16 | 1979-12-20 | Eichler Juergen | Probe for laser surgery - is tubular and placed against or inserted in tissue, with or without heated end |
| US4849859A (en) * | 1986-04-22 | 1989-07-18 | Kabushiki Kaisha Morita Seisakusho | Laser-type handpiece |
| US4760840A (en) * | 1986-12-16 | 1988-08-02 | The Regents Of The University Of California | Endoscopic laser instrument |
| US5112328A (en) * | 1988-01-25 | 1992-05-12 | Refractive Laser Research & Development Program, Ltd. | Method and apparatus for laser surgery |
| US4955882A (en) * | 1988-03-30 | 1990-09-11 | Hakky Said I | Laser resectoscope with mechanical and laser cutting means |
| US4963142A (en) * | 1988-10-28 | 1990-10-16 | Hanspeter Loertscher | Apparatus for endolaser microsurgery |
| AU6897991A (en) * | 1990-01-08 | 1991-08-05 | Health Research Inc. | A submersible lens fiberoptic assembly |
| US5261904A (en) * | 1990-01-30 | 1993-11-16 | C. R. Bard, Inc. | Laser catheter having diffraction grating for beam shaping |
| IL97130A (en) * | 1990-02-07 | 1995-07-31 | Coherent Inc | Contact laser delivery system |
| US5257989A (en) * | 1990-02-07 | 1993-11-02 | Coherent, Inc. | Contact laser delivery probe |
| AU8907091A (en) * | 1990-10-11 | 1992-05-20 | General Hospital Corporation, The | Coagulating scalpels |
| IL96092A0 (en) * | 1990-10-23 | 1991-07-18 | ||
| US5342352A (en) * | 1991-04-02 | 1994-08-30 | Franken Peter A | Laser debridement of wounds |
| US5312398A (en) * | 1992-04-13 | 1994-05-17 | Coherent, Inc. | Apparatus for delivering a laser beam |
| US5352221A (en) * | 1992-11-04 | 1994-10-04 | Fumich Robert M | Guide tip apparatus for laser surgery |
| US5342358A (en) * | 1993-01-12 | 1994-08-30 | S.L.T. Japan Co., Ltd. | Apparatus for operation by laser energy |
| US5336215A (en) * | 1993-01-22 | 1994-08-09 | Intelligent Surgical Lasers | Eye stabilizing mechanism for use in ophthalmic laser surgery |
| US5496309A (en) * | 1994-05-06 | 1996-03-05 | Trimedyne, Inc. | Catheter device utilizing a laser beam laterally directed by a high index prism in a liquid medium |
-
1995
- 1995-10-25 US US08/548,269 patent/US5591161A/en not_active Expired - Lifetime
-
1996
- 1996-10-09 CA CA002207678A patent/CA2207678A1/en not_active Abandoned
- 1996-10-09 AU AU72619/96A patent/AU7261996A/en not_active Abandoned
- 1996-10-09 WO PCT/US1996/016135 patent/WO1997015235A1/en not_active Application Discontinuation
- 1996-10-09 EP EP96934126A patent/EP0798989A1/en not_active Withdrawn
- 1996-10-09 JP JP9516624A patent/JPH10500608A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US5591161A (en) | 1997-01-07 |
| WO1997015235A1 (en) | 1997-05-01 |
| EP0798989A1 (en) | 1997-10-08 |
| AU7261996A (en) | 1997-05-15 |
| JPH10500608A (en) | 1998-01-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |