Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent
1974-10-18
1976-03-02
McGraw, Vincent P.
Optics: measuring and testing
Refraction testing
Prism engaging specimen
73 231, 73 611C, 356184, 356206, 356244, 356246, G01J 346, G01N 2128, G01N 110
Patent
active
039414876
ABSTRACT:
A light beam is passed through a cuvette, through which flows liquid to be analyzed optically for concentration of color reacted amino acids. The emergent beam is directed through a series of dichroic beam separators and pass band filters to produce three beams of substantially three different wavelengths. Photoelectric detectors produce electrical signals corresponding to each of the three wavelengths. Two of the signals are characteristic of the substance to be detected. The third is subtracted from the other two wavelength signals to produce a pair of output signals from which base line noise has been substantially eliminated.
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Jenkins & White; Fundamentals of Optics; McGraw Hill; 3rd ed., 1957, (New York); p. 432.
Durland Douglas H.
Ehret Robert J.
Sharples Thomas D.
Stephens Donald E.
Beckman Instruments Inc.
McGraw Vincent P.
Mehlhoff F. L.
Steinmeyer R. J.
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