Spectroscopic apparatus with balanced dual detectors

Details Spectroscopic apparatus with balanced dual detectors Spectroscopic apparatus with balanced dual detectors

1975-08-28

1977-11-08

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250345, G01N 2126

Patent

active

040577341

ABSTRACT:
A spectrometer having two photoelectric channels the outputs of which are compared in order to measure gas or liquid concentrations, and means for automatically balancing the photoelectric channels immediately prior to each successive measurement, said means including a reference source of radiation which is utilized for balancing both photoelectric channels, so that when a measurement of the gas or liquid is being made, both photoelectric channels as nearly as possible are effectively balanced.

REFERENCES:
patent: 3504978 (1970-04-01), Shibata et al.
patent: 3680957 (1972-08-01), Fukuda
patent: 3895233 (1975-07-01), Boll et al.
patent: 3973849 (1976-08-01), Jackson

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