Infrared analyzer of constant radiant energy

Details Infrared analyzer of constant radiant energy Infrared analyzer of constant radiant energy

1976-01-20

1977-04-05

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250205, 250210, 250349, G01J 100, G01J 132, G01N 2124, G01N 2126

Patent

active

040164233

ABSTRACT:
This invention relates to an improved infrared analyzer, wherein the total radiant energy reaching the detector is maintained at a constant value independently from the aging of the source of radiant energy or the soiling of the sample cell. According to the invention, the improved infrared analyzer comprises a comparator, whose outlet feeds the radiant energy source and whose inlets receive a reference signal of constant value and, respectively, a signal which varies as a function of the total radiant energy received and measured by the detector.

REFERENCES:
patent: 2775160 (1956-12-01), Foskett et al.
patent: 3601613 (1971-08-01), Hock
patent: 3911277 (1975-10-01), Cederstrand et al.

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