Color measurement instrument

Details Color measurement instrument Color measurement instrument

2006-12-05

2006-12-05

Evans, F. L. (Department: 2877)

Optics: measuring and testing

By shade or color

Reexamination Certificate

active

07145657

ABSTRACT:
An LED-based color measurement instrument including an illumination system and a sensing system. The illumination system includes modulated LEDs and a temperature control system for regulating the temperature of the LEDs, thereby improving the consistency of their performance. The sensing system includes a photodiode, a transimpedance amplifier, and an integrator in the first stage to cancel the effect of ambient light on the output of the first stage. The sensing system also includes a lens system for imaging a target area of the target sample onto the photo sensor in a manner so that the product of the target area times the solid angle captured by the lens system is generally uniform over a selected range of distances, thereby reducing the positional sensitivity of the instrument with respect to the target sample.

REFERENCES:
patent: 3715163 (1973-02-01), Mitchell
patent: 3910701 (1975-10-01), Henderson et al.
patent: 4111556 (1978-09-01), Grisar et al.
patent: 4553033 (1985-11-01), Hubble, III et al.
patent: 4568191 (1986-02-01), Barry
patent: 4687335 (1987-08-01), Zupanick et al.
patent: 4917500 (1990-04-01), Lugos
patent: 4964692 (1990-10-01), Prescott
patent: 4986665 (1991-01-01), Yamanishi et al.
patent: 4989985 (1991-02-01), Hubble, III et al.
patent: 5078497 (1992-01-01), Borton et al.
patent: 5137364 (1992-08-01), McCarthy
patent: 5150174 (1992-09-01), Ryczek et al.
patent: 5210590 (1993-05-01), Landa et al.
patent: 5266792 (1993-11-01), Crowne et al.
patent: 5272518 (1993-12-01), Vincent
patent: 5303037 (1994-04-01), Taranowski
patent: 5377000 (1994-12-01), Berends
patent: 5526190 (1996-06-01), Hubble, III et al.
patent: 5604567 (1997-02-01), Dundas et al.
patent: 5612902 (1997-03-01), Stokes
patent: 5671059 (1997-09-01), Vincent
patent: 5748221 (1998-05-01), Castelli et al.
patent: 5838451 (1998-11-01), McCarthy
patent: 5844680 (1998-12-01), Sperling
patent: 5963244 (1999-10-01), Mestha et al.
patent: 5963333 (1999-10-01), Walowit et al.
patent: 5982957 (1999-11-01), DeCaro et al.
patent: 6020583 (2000-02-01), Walowit et al.
patent: 6147761 (2000-11-01), Walowit et al.
patent: 6157454 (2000-12-01), Wagner et al.
patent: 6157469 (2000-12-01), Mestha
patent: 6178007 (2001-01-01), Harrington
patent: 6351308 (2002-02-01), Mestha
patent: 6373568 (2002-04-01), Miller et al.
patent: 6384918 (2002-05-01), Hubble, III et al.
patent: 6405929 (2002-06-01), Ehrhart et al.
patent: 6419340 (2002-07-01), Wickham et al.
patent: 6538770 (2003-03-01), Mestha
patent: 6556300 (2003-04-01), Tandon et al.
patent: 6567170 (2003-05-01), Tandon et al.
patent: 6574425 (2003-06-01), Weiss et al.
patent: 6603551 (2003-08-01), Mestha et al.
patent: 2002/0191183 (2002-12-01), Tandon et al.
patent: 2002/0191188 (2002-12-01), Hubble, III et al.
patent: 2003/0048449 (2003-03-01), Vander Jagt et al.
patent: 2003/0063275 (2003-04-01), Hubble, III e al.
patent: 2003/0067502 (2003-04-01), Arquilevich et al.
patent: 2003/0086090 (2003-05-01), Tandon et al.
patent: 2003/0122502 (2003-07-01), Clauberg et al.
patent: 2003/0132982 (2003-07-01), Tandon et al.
patent: 2003/0142314 (2003-07-01), Hubble, III et al.
Keyence Corporation, “Color-Differentiating Fiberoptic Sensor” product brochure, Dec. 2002, pp. 1-8.
Delta Computer Systems, “CS64A Color Sensors,” product brochure, 2001, pp. 1-22.
Keyence Corporation, “Highly Advanced RGB Digital Fiberoptic Sensor,” downloaded from http://world.keyence.com
ewprod/cz—k.html, Aug. 15, 2002, pp. 1-8.
Vydas International Marketing, “Programmable Colour Sensor,” downloaded from http://www.ssensorsforindustry.com/prod21.htm, Aug. 12, 2002, pp. 1-4.
Sick Optic Electronics, “CS1 Color Sensor,” product brochure, 612003, pp. 364-369.
Balluff Inc., “Inductive Sensors 2002: The NEW BFS-26K Sees Your True Colors!,” downloaded from http://www.balluff.com/BFS/default.htm, Aug. 12, 2002.
Sensor Instruments GmbH, “SI-COLO Series,” downloaded from http://www.johnkopplin.com/si-colo2-30-e.pdf, Jan. 25, 2002.
Zand, et al, “Transimpedance Amplifier with Differential Photodiode Current Sensing,” Univ. of Toronto Dept. of Electrical and Computer Engineering, vol. 2, 1999, pp. 624-627.
Burr-Brown Corporation, “Monolithic Photodiode and Amplifier,” product brochure, 1994, pp. 1-9.
Linear Technology, “Low Noise, Picoampere Bias Current, JFET input OP AMP,” product brochure, 1999, pp. 1-12.

Affiliated with

Also associated with

Rating

Color measurement instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Color measurement instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color measurement instrument will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3709275