Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-09-08
1995-03-28
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250226, H01J 516
Patent
active
054019583
ABSTRACT:
An optical temperature compensation system for spectral modulation sensors includes a light director for receiving excitation light, a spectral modulation sensor for receiving and modulating a first portion of the excitation light from the light director, and an optical processing component for receiving and determining properties of a second portion of the excitation light from the light director and the modulated first portion of the excitation light. The optical processing component comprises a dispersive element for dispersing the second portion of the excitation light and the modulated first portion of the excitation light and a charge transfer device for converting the dispersed portions of light into electrical signals. A digital signal processor calculates a detected ratio of the electrical signals which compensates for inaccuracies in measurement due to source temperature variations.
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General Electric Company
Kratz Ann M.
Nelms David C.
Snyder Marvin
Te Que T.
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