Apparatus for background absorption compensation in spectrophoto

Details Apparatus for background absorption compensation in spectrophoto Apparatus for background absorption compensation in spectrophoto

1975-11-24

1977-06-28

McGraw, Vincent P.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 93, 356 95, 356 97, G01J 336, G01J 342

Patent

active

040322351

ABSTRACT:
The photoelectric detector output in the spectrophotometer is amplified with separate stages of fixed and variable gain to derive background absorption compensation when the intensity of the continuous spectrum emitting radiation source therein varies from optimum levels. Where a reference output of the photoelectric detector is desirable for the background absorption compensation, a dark interval of the photoelectric detector and an output channel are provided for each gain stage.

REFERENCES:
patent: 3901601 (1975-08-01), Lahmann

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