Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1975-10-01
1976-12-21
Smith, Alfred E.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250233, G02B 514, H01J 516, H01J 3912
Patent
active
039990621
ABSTRACT:
A spectrophotometer includes a wide band radiant energy source and a detector for providing an output signal proportional to the intensity of the radiant energy received thereby. A light pipe system is divided into a reference path and a sample path. Such system coacts with a rotary assembly having a variable monochromatic filter located diametrically opposite to an opening through which radiant energy can freely pass. The remaining portions of the rotary assembly are opaque so that as the assembly turns, the sample and reference paths are serially energized by monochromatic energy and then by polychromatic energy. The sample path includes a sample illumination and collection system for illuminating a test sample and collecting the light reflected therefrom. The resultant output of the detector can be analyzed to determine the amount of fluorescence.
REFERENCES:
patent: 3292484 (1966-12-01), Clay
patent: 3354319 (1967-11-01), Loewen et al.
Demsky Herbert M.
Mathisen Einar S.
Owen Theodore R.
Tong Alvin H.
International Business Machines - Corporation
McKechnie Douglas R.
Moore David K.
Smith Alfred E.
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