US20010015806A1 - Portable scanning spectrophotometer - Google Patents
Portable scanning spectrophotometer Download PDFInfo
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- US20010015806A1 US20010015806A1 US09/845,144 US84514401A US2001015806A1 US 20010015806 A1 US20010015806 A1 US 20010015806A1 US 84514401 A US84514401 A US 84514401A US 2001015806 A1 US2001015806 A1 US 2001015806A1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0272—Handheld
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
- G01N2201/022—Casings
- G01N2201/0221—Portable; cableless; compact; hand-held
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
- The present invention relates to color measurement instruments, and more particularly, to spectrophotometers.
- Color measurement instruments for many and varied applications are well known. These instruments are used, for example, to determine color consistency in printed material, photographic material, textiles, and plastics. The most comprehensive color measurements are obtained by instruments known as spectrophotometers, which measure the spectral distribution of light and give a percentage reflection or transmission at many segments in the visible color spectrum.
- The field of desk top publishing has expanded greatly in recent years, and color output devices such as color printers, plotters, proofers have become widely used. The color output devices are often controlled by computer software, which transmits control signals to the printer defining color to be produced. To assure color quality, it is desirable to be able to calibrate color printers to produce a selected quality of color for printed material produced by a number of different printers. Additionally, data defining a color product may be transmitted to remote locations to be printed by a variety of printers. In order to be able to provide a product of consistent color characteristics, a comparison to a color standard is required. All of these functions require the accurate measurement of many samples of different colors produced on the device. These colors are produced using only a few colorants—usually cyan (C), magenta (M), yellow (Y), and black (K).
- A color measurement instrument, such as a spectrophotometer, includes a color measurement engine having an optical pick-up. Additionally, many instruments include a drive mechanism for moving either the sample or the engine to effect relative movement between the two. The registration of the sample with respect to the engine and the controlled movement of the sample or the engine are critical components in obtaining consistent and accurate measurements. Only small changes in the distance between the sample and the measurement engine can create significant errors and inconsistencies in the color measurement.
- Prior color measurement instruments are illustrated in U.S. Pat. Nos. 5,369,494 issued Nov. 29, 1994 and entitled “Portable Scanning Colorimeter”; 5,118,183 issued Jun. 2, 1992 and entitled “Automated Strip Reader Densitometer”; and 5,062,714 issued Nov. 5, 1991 and entitled “Apparatus and Method for Pattern Recognition.” In these units, the sample drive mechanism is located in the base, while the color measurement engine is located in an assembly above the base. Because these two primary components are located in different housings, there is the possibility that sample registration and movement is not as precisely controlled as required for present day measurement. Accordingly, artisans continue to seek improved structures for maintaining improved consistency and accuracy in sample registration and movement.
- The aforementioned issues are addressed in the present invention providing improved sample registration and movement within a portable spectrophotometer. The instrument contains a mechanical drive system that transports the sample past the measurement engine in a precise fashion.
- First, the spectrophotometer includes a base and an upper assembly supported for floating movement on the base. Both the color measurement engine and the sample drive mechanism are located within the upper assembly. As the sample is drawn between the base and the upper assembly, the upper assembly can float with samples of various and varying thickness. This approach reduces or even eliminates the need for separate tensioning devices within the drive system, such as springs and/or close tolerances.
- Second, the drive mechanism includes a plurality of drive wheels, and the base includes a plurality of independently suspended idler rollers, each of which engages and supports one of the drive wheels. The independently suspended rollers flex to accommodate samples of varying and various thicknesses.
- In a third embodiment of the invention, the drive rollers are located “downstream” (in the direction of sample travel) from the color measurement engine. Tension rollers are provided upstream of the color measurement engine to at least partially resist movement of the sample in response to the drive rollers. The tension created within the sample improves its consistent maintenance in a uniform plane and therefore its consistent registration with the color measurement engine.
- In a fourth embodiment of the invention, a planar, low-friction media guide is located on the underside of the upper assembly to engage the top surface of the sample. The thickness of the media is approximately the same as the distance that the drive wheels extend from the upper assembly, so that the media guide consistently engages the top surface of the sample. Therefore, the media guide improves the registration of the sample with respect to the color measurement engine; and the media guide assists the upper assembly in riding the top surface of the sample.
- In a fifth embodiment, a two-position backer is provided in the base. The backer includes two separate areas with different reflective properties. The backer is readily manually movable so that either of the two areas can be aligned with the optical pickup of the color measurement engine. For example, the two areas may be white light diffusing opal and stable uniform black. In an alternative embodiment, the light diffusing opal may be illuminated for transmissive analysis.
- In a sixth aspect of the invention, the spectrophotometer is capable of both reflective and transmissive analysis. A first light source is included within the color measurement engine and is activated only when reflective analysis is desired. A second light source is included within the base, is aligned with the color measurement engine, and is activated only when transmissive analysis is desired.
- These and other objects, advantages, and features of the invention will be more readily understood and appreciated by reference to the description and the drawings.
- FIG. 1 is a right front perspective view of the spectrophotometer of the present invention;
- FIG. 2 is a left front perspective view of the spectrophotometer;
- FIG. 3 is a perspective view of the spectrophotometer with the base components exploded;
- FIG. 4 is a perspective view of the base;
- FIG. 5 is a top plan view of the base showing the backer in a first position;
- FIG. 6 is a top plan view of the base showing the backer in its second position;
- FIG. 7 is a bottom plan view of the base showing the backer in the second position;
- FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 5;
- FIG. 9 is a perspective view of the underside of the base with an alternative backer capable of illumination;
- FIG. 10 is a perspective exploded view of the upper assembly;
- FIG. 11 is a front elevation view of the drive shaft and motor;
- FIG. 12 is an enlarged perspective view of the drive shaft bearing;
- FIG. 13 is a fragmentary bottom plan view of the upper assembly showing the media guide; and
- FIG. 14 is a sectional view of the spectrophotometer taken along the line XIV-XIV in FIGS. 1 and 2.
- A spectrophotometer constructed in accordance with a preferred embodiment of the present invention is illustrated in the drawings and generally designated10. As perhaps best illustrated in FIGS. 3 and 10, the spectrophotometer includes a
base 12 and anupper assembly 14 supported on the base. The base includes twosets upper assembly 14 includes aspectral analysis engine 20, adrive assembly 22, andtension rollers 24. Theengine 20 includes an optical pick-up 75. Thedrive rollers 22 of the upper assembly engage theidler rollers 16 of the base, and thetension rollers 24 of the upper assembly engage theidler rollers 18 of the base all to partially support theupper assembly 14 on thebase 12. Thedrive rollers 22 pull or draw the sample S (see FIG. 1) through thespectrophotometer 10 and past the optical pick-up 75. Thetension rollers 24 create a tension on the sample S to maintain the sample in a consistent plane. - I. Base
- The base is perhaps best illustrated in FIGS.3-8. Generally, the
base 12 includes abody 26,idler rollers backer 30. - The
body 26 is plastic and includes aconnector portion 32 and asample portion 34. Theconnector portion 32 includes aplatform 36, a pair of alignment pins 35 a and 35 b, and a pair of integrally molded spring clips 38. Theplatform 36 provides an engagement surface for theupper assembly 14. Thepins apertures upper assembly 14 on the base 12 in a horizontal plane. The spring clips 38 include catches 39 (see FIG. 4) above theplatform 36 and actuating portions 40 (see FIGS. 7 and 9) that extend through and below the platform. The actuating portions may be manually actuated from the underside of the base 12 to release theupper assembly 14 from thebase 12. - The
sample portion 34 of thebase 12 is generally planar and supports theidler rollers backer assembly 30. Theforward edge 41 of the platform is rounded to facilitate insertion of the sample S between the base 12 and theupper assembly 14. A 35 mm groove or guide 43 in theforward edge 41 facilitates insertion and alignment of a strip of 35 mm film (not shown). A race-track shapedwindow 39 is defined in a central portion of thesample portion 34. - The body base includes
integral fingers finger 47 a is opposed to thefingers 47 b and 47 c, and the fingers slidingly receive thebacker assembly 30 as will be described. Afoot 45 is mounted at each of the four corners of the base body. Preferably, the feet are fabricated of a relatively high-friction material to assist in securely support theunit 10 on a smooth surface. - All of the
idler rollers roller body stub shafts 16 b or 18 b extending therefrom. - Each of the
rollers 16 is supported by asuspension arm 40. Each of thesuspension arms 40 terminates in a bearingportion 42 which receives thestub shafts 16 b and rotatably supports the associatedroller 16. Each of thesuspension arms 40 is integral with the remainder of thebase body 26. Thebase 26 is fabricated of a resiliently flexible plastic, and therefore each of thearms 40 is resiliently deflectable downwardly under the weight of theupper assembly 14. - Similarly, each of the
idler rollers 18 is supported for independent suspension on asuspension arm 44. Each of the suspension arms terminates in a bearingportion 46 for which receives the stub shafts 18 b and rotatably supports the associatedroller 18. As witharms 40,suspension arms 44 are resiliently deflectable in the downward direction under the weight of theupper assembly 14. When not deflected, therollers rollers 16 and 17 are retained in the bearingportions stub shafts 16 b and 18 b extend under thesample portion 34. Any of therollers 16 and 17 can be removed by pressing the supporting arm downwardly and lifting the roller from the bearing portion. - The
backer assembly 30 is illustrated in FIGS. 3 and 7-8 and includes abody 49, a spring plunger 50, and anopal glass 51. Thebody 49 is held betweenfingers 47 a on one side and 47 b and 47 c on the other side for sliding movement. The spring plunger 50 cooperates with detents (not visible) in the underside of thebase body 26 to releasably catch the assembly in either of two opposite positions. Thebacker body 49 includes a recessedarea 54 that facilitates removal of thebacker assembly 30 from thebase body 26 when the recessedarea 54 is aligned with thefinger 47 a. - The
body 49 includes aplatform portion 52 extending upwardly from the remainder of thebody 49 and into thewindow 39 of thebase body 26. The platform provides two separate areas with different reflective properties. The first area 52 a is stable uniform black. Thesecond area 52 b supports the white light diffusingopal glass 51. Thewhite opal glass 51 is secured in position on theplatform 52 using a solvent adhesive or other suitable interconnection means. - An
alternative backer assembly 30′ is illustrated in FIG. 9. Thealternative backer assembly 30′ is capable of providing illumination for operation of thespectrophotometer 10 in a transmissive mode of analysis. In thealternative backer 30′, anillumination source 60 is positioned within the cavity 37 directly below the opal glass 51 (see FIG. 8). A power cord 62 extends from thebacker assembly 30′ and terminates in aplug 64 mounted within thebacker base 26. The cord 62 is secured underwire management fingers 66, which are integral with thebase body 26. The plug orconnector 64 is held in position by thebase body 26 for automatic connection with theupper assembly 14 when theupper assembly 14 is installed on thebase 12. - II. Upper Assembly
- The
upper assembly 14 is illustrated in FIGS. 10-14. Theupper assembly 10 includes ahousing 70, aspectral measurement engine 20, adrive assembly 22, and alower plate 72. - The
housing 70 is injection molded of plastic to house the remaining upper assembly components. The housing includes anintegral alignment mark 71 centered above thefilm strip guide 43 and linearly aligned with thespectral engine 20 to assist a user with properly aligning the sample S for scanning by the engine. - The
spectral measurement engine 20 of the preferred embodiment is generally well known to those skilled in the art. For example, one suitable spectral engine is illustrated co-pending application Ser. No. 08/714,969 filed Sep. 17, 1996 by Berg et al and entitled “Compact Spectrophotometer,” the disclosure of which is incorporated by reference. Other measurement engines, such as those for calorimeters and densitometers, can be used depending on the application. Generally speaking, theengine 20 includes anoptics assembly 74, a printed circuit board (PCB)assembly 76, and acontrol board shield 78. Theoptics assembly 74 includes an optical pick-up 75 (see FIG. 14). ThePCB assembly 76 and theshield 78 are secured to theoptics assembly 74 usingscrews 80 andstar lock washers 82. Theoptics assembly 74 is secured to the aluminum stand-offs on thebottom plate 72 usingscrews 81 andstar lock washers 83. Additionally, thebottom plate 72 is secured to theoptics assembly 74 usingscrews 85. Thealuminum bottom plate 72 and the aluminum stand-offs 98 dissipate heat generated by the optics assembly and most notably by theilluminators 77. Awire tie 87 is included for wire management. - A plurality of illuminators77 (see FIG. 14) are included within the
spectral engine 20 to illuminate the sample S when theunit 10 is operated in the reflective analysis mode. Theilluminators 77 are actuated only in the reflective mode (i.e. not in the transmissive mode). - The
bottom plate 72 is generally planar, is fabricated of aluminum and provides an underside to theupper assembly 14. The perimeter of thebottom plate 72 is dimensioned to closely fit within the bottom of thehousing 70. Theplate 72 is secured to thehousing 70 usingscrews 73. - The plate define two
rectangular apertures 96 that receive the lockingarms 38 of thebase 12. When theupper assembly 14 is attached to thebase 12, thecatches 39 of the lockingarms 38 engage the upper surface of the bottom plate to lock the upper assembly on the base; and thebottom plate 72 rests upon theplatform 36 of the base 12 to at least partially support the weight of the upper assembly. The plate further defines twoalignment apertures base 12. The interfit of the lockingarms 38 within theapertures 96 and the interfit of the alignment pins 35 within the apertures 97 prevents the upper assembly from rotating in a generally horizontal plane, but permits the upper assembly to float or pivot in a generally vertical plane. - The
plate 72 defines a series ofelongated apertures 90 through which drive rollers extend, a pair ofelongated apertures 92 through which idler rollers extend, and anoptics aperture 94 aligned with the optical pick-up 75 (see FIG. 14). - The drive assembly22 (see FIGS. 10-11) includes a
drive shaft assembly 100 and amotor assembly 102. The drive shaft is secured to the motor assembly using setscrews 103. Thedrive shaft assembly 100 includes fivedrive wheels 104 of uniform diameter with the wheels being evenly spaced from one another. Because the upper assembly is free to float in a vertical plane, the drive shaft assembly is also free to float in a vertical plane. The individual suspension of theidler rollers 16 under thedrive rollers 104 accommodates such angular floatation. - Each of the
wheels 104 defines a circumferential groove 106 (see FIG. 11). An O-ring 108, which acts as a tire, is fitted within each of the grooves 106. Each of the O-rings is fabricated of a relatively high-friction material for gripping the sample to be analyzed. The material of the preferred embodiment is precision silicone. Themotor assembly 102 is generally well known in the art. The motor of the preferred embodiment is a high-torque gear motor or a stepper motor. Thedrive rollers 104 extend throughapertures 90 to extend approximately 0.3 millimeter (mm) from the lower surface of the bottom plate 72 (see FIG. 14). As currently implemented, the drive assembly moves or pulls the sample S at a speed of approximately 3 centimeters (cm) per second. - The
drive assembly 22 is secured to thebottom plate 72 by thedrive bearings 110 illustrated in greatest detail in FIG. 12. Each of thedrive bearings 110 is generally U-shaped, defining an interior having acircular portion 112 and a pair of opposedflat portions 114. The distance between theflat portions 114 is less than the diameter of thecircular portion 112. Thedrive bearings 110 are fabricated of bearing-quality plastic or other resiliently deformable material. Accordingly, the legs can be spread slightly to fit the bearing over thedrive shaft 100. The drive shaft then clicks into thecircular portion 112. Screws 116 (FIG. 10) are inserted throughholes 118 in thebearing 110 to lock the drive shaft within thecircular portion 112 and to secure the bearing to thebottom plate 72. Lubricant preferably is included within the bearing 110 to facilitate rotation of thedrive shaft 100. - Idler rollers24 (see FIG. 10) are rotatably supported on the
bottom plate 72 by way ofbearings 120 and screws 122. Theidler rollers 24 extend throughapertures 92 to extend approximately 0.3 millimeter (mm) from the lower surface of the bottom plate 72 (see FIG. 14). - The media guide130 is illustrated in FIGS. 3 and 13-14 and is a generally planar piece of relatively low-friction material. The preferred material of the present embodiment is a bearing-quality material that is soft enough to avoid damage of the sample S. As currently implemented, the material is a high-density polypropylene. As viewed in FIG. 3, the media guide is milk-can shaped having a relatively narrow
forward portion 132 to fit between theidler rollers 24. Therearward portion 134 defines acentral aperture 136 aligned with theoptics aperture 94 in thebase plate 72 and with the optical pick-up 75 of thecolor measurement engine 20. The media guide 130 is adhered to thebottom plate 72 using a pressure-sensitive adhesive or other suitable attachment means. The thickness of the media guide is approximately 0.3 mm so that it projects from thelower plate 72 approximately the same distance that theidler rollers 24 and thedrive rollers 104 project from thelower plate 72. Consequently, therollers - As seen in FIG. 1, the upper assembly further includes a 12-
volt power connection 132 for powering theunit 10, an RS-232port 134 for serial communication with a personal computer (PC) or other digital device, and a push-button 136 for actuating and operating the unit. - III. Operation
- The operation of the
spectrophotometer 10 is perhaps best illustrated in FIGS. 1 and 14. For purposes of reference, the area above thebacker assembly 30 and below the optical pick-up 75 is referred to as thescanning station 140. Thebacker assembly 30 is aligned with the optical pick-up across the scanning station. - If necessary, the reflectance of the
backer assembly 30 is selected by manually sliding the backer assembly to either of its two selectable positions. In the first position, the stable uniform black portion 52 a of theplatform 52 is presented to thecolor measurement engine 20. In the second position, the white light diffusingopal glass 51 inportion 52 b is presented to theengine 20. - A sample S (FIG. 1), having color patches S′, to be analyzed is aligned with the
alignment mark 71 on the upper assembly and fed or pushed between the base 12 and theupper assembly 14. The leading edge of the sample S passes between thetension rollers 24 on the upper assembly and theidler rollers 18 on the base. The sample continues through thescanning station 140 until the forward edge of the sample S is gripped by thedrive wheels 104, whereupon the sample is pulled between the drive rollers and the associatedidler rollers 16. Spectral analysis or other color measurement operations are conducted on the sample S as it is drawn past thecolor measurement engine 20 and specifically theoptical pickup 75. - As the sample moves between the
idler rollers suspension arms 44 flex to permit theindividual rollers 18 to move downwardly. Similarly, as the sample is drawn between thedrive rollers 104 and theidler rollers 16, theindividual suspension arms 40 flex to permit therollers 16 to move downwardly. Also, thetension rollers 24 and thedrive rollers 108 engage and ride along the top surface of the sample S to assist in registration of the sample with respect to the optical pick-up 75. The free floating ability of theupper assembly 14 and the individual suspension of theidler rollers 18 facilitate the accurate color measurement of samples of varying thickness. Theupper assembly 14 rides along the top surface of the sample S to maintain a desired physical registration or relationship between the top surface of the sample and theengine 20. - As noted above, the
tension rollers 24, thedrive rollers 104, and the media guide 130 all project a substantially equal distance from thebottom plate 72. Accordingly, the media guide 130 also engages the top surface of the sample S to further assist in registration. The media guide 130 prevents flexing or bowing of the sample within the scanning station as may occur, for example, if the trailing edge of the sample is dropped below or is lifted above the level of thescanning station 140. - The spectrophotometer may be operated in either the reflective or the transmissive mode. When operated in the reflective mode, only the
illuminators 77 are actuated so that the top surface of the sample S is illuminated in accordance with the ANSI standard 45°/0° reflection measurement. When operated in the transmissive mode, only thebase illuminator 60 within thebacker assembly 30 is actuated to illuminate the sample from beneath in accordance with the ANSI standard 180°/0° transmissive measurement. - The above descriptions are those of preferred embodiments of the invention. Various alterations and changes can be made without departing from the spirit and broader aspects of the invention as defined in the appended claims, including the Doctrine of Equivalents.
Claims (40)
Priority Applications (1)
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US09/845,144 US6346984B2 (en) | 1999-07-02 | 2001-04-30 | Portable scanning spectrophotometer |
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US09/341,156 US6198536B1 (en) | 1998-09-01 | 1998-09-01 | Portable scanning spectrophotometer |
US09/704,005 US6285452B1 (en) | 2000-11-01 | 2000-11-01 | Portable scanning spectrophotometer |
US09/845,144 US6346984B2 (en) | 1999-07-02 | 2001-04-30 | Portable scanning spectrophotometer |
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Cited By (9)
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US20050242191A1 (en) * | 2004-04-30 | 2005-11-03 | X-Rite, Incorporated | Color measurement instrument capable of both strip reading and spot reading |
US20070046958A1 (en) * | 2005-08-31 | 2007-03-01 | Microsoft Corporation | Multimedia color management system |
US20070046691A1 (en) * | 2005-09-01 | 2007-03-01 | Microsoft Corporation | Gamuts and gamut mapping |
US20070121133A1 (en) * | 2005-11-30 | 2007-05-31 | Microsoft Corporation | Quantifiable color calibration |
US20070121132A1 (en) * | 2005-11-30 | 2007-05-31 | Microsoft Corporation | Spectral color management |
US7426029B2 (en) | 2005-08-31 | 2008-09-16 | Microsoft Corporation | Color measurement using compact device |
US20140192358A1 (en) * | 2011-08-31 | 2014-07-10 | Markus Barbieri | Color measurement apparatus |
USD732034S1 (en) * | 2014-03-10 | 2015-06-16 | Avision Inc. | Scanner |
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DE10246563A1 (en) * | 2002-10-05 | 2004-04-15 | november Aktiengesellschaft Gesellschaft für Molekulare Medizin | Color determination device for determining the colors on a surface, said colors varying dependent on the angle of observation, e.g. for banknote checking, whereby an arrangement of angled light emitters and detectors is used |
CA2545653C (en) | 2003-11-21 | 2014-07-08 | Anp Technologies, Inc. | Asymmetrically branched polymer conjugates and microarray assays |
WO2006119160A2 (en) | 2005-05-02 | 2006-11-09 | Anp Technologies, Inc. | Polymer conjugate enhanced bioassays |
US7489396B1 (en) | 2005-05-18 | 2009-02-10 | Vie Group, Llc | Spectrophotometric camera |
USD755405S1 (en) * | 2015-02-20 | 2016-05-03 | Siemens Healthcare Diagnostics Inc. | Enclosure cover for a diagnostic analyzer |
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US6346984B2 (en) | 2002-02-12 |
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