Optics: measuring and testing – By shade or color – With color transmitting filter
Patent
1992-09-28
1994-10-18
McGraw, Vincent P.
Optics: measuring and testing
By shade or color
With color transmitting filter
356419, 356 51, 250351, G01N 2125, G01J 300
Patent
active
053573439
ABSTRACT:
A spectrophotometer is described, comprising a single light source, a single detector, optics for dually and alternatively reading a sample and a reference, and only one moving part. That moving part is a chopper containing multiple pass-through apertures, each filled with a unique bandpass filter to select wavelengths to specifically illuminate the sample or reference. To inform the spectrophotometer whether and when it is reading the sample or the reference, trigger means are provided in at least twice the number of the pass-through apertures.
REFERENCES:
patent: 3780299 (1973-12-01), Bock
patent: 3999062 (1976-12-01), Demsky et al.
patent: 4061428 (1977-12-01), Amano et al.
patent: 4097743 (1978-06-01), Carlson
patent: 4291985 (1981-09-01), Tsujimura
patent: 4305663 (1981-12-01), Perkins et al.
patent: 4477190 (1984-10-01), Listen et al.
patent: 4644485 (1987-02-01), Ferber et al.
patent: 4648714 (1987-03-01), Benner et al.
patent: 4945250 (1990-07-01), Bowen et al.
patent: 4977325 (1990-12-01), Bowen et al.
Konnerth et al., "In-Situ Measurement", IEEE Transactions (Jul. 1975), pp. 452-456.
D. L. Wetzel, "Near-infrared Reflectance Analysis", Anal. Chem., 55(1983)1165A-1166A.
S. C. Stinson, "Advances Made in Applying IR Sensors to Process Control", Chem. and Eng. News, Jan., 1989, pp. 30-31.
P. Dubois, et al., "Determination of Five Components in a Pharmaceutical Formulation Using Near Infrared Relectance Spectrophotometers", Analyst, vol., 112, p. 1675 (1987).
B. R. Buchanan et al., "Detection of Ethanol in wines Using Optical-Fiber Measurements and Near-Infrared Analysis", Appl. Spect., vol., 42, p. 1106, (1988).
Instruction Manual, Microquad 8000, Nov. 25, 1984, pp. 1.1-2.6.
"Iota A New Computer Controlled Thin Film Thickness Measurement Tool", 1972, vol. 15, pp. 371-380, Konnerth et al.
Introduction to Solid-State Television Systems, "Color and Black & white", pp. 128-131 date unknown.
Detection of Signals in Noise, 1971, pp. 239-241.
Optical Coating Laboratory, Inc., Stock Filter Catalog 1990-1991 pp. 4, 28-36.
Liu Hsue-Yang
Lowne Alan J.
Sandifer James R.
Switalski Steven C.
Uerz David S.
Bailey Clyde E.
Eastman Kodak Company
Hantis K. P.
McGraw Vincent P.
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