Light measuring system

Details Light measuring system Light measuring system

1979-06-04

1981-12-22

Corbin, John K.

Optics: measuring and testing

Photometers

Photoelectric

356213, 356218, 354 60R, 354 60A, G01J 100, G01J 132, G01J 142, G03B 700

Patent

active

043068073

ABSTRACT:
In the disclosed system, a light measuring circuit having a logarithmical amplifier, is constructed to produce pulses at a frequency corresponding to the output of the light measuring circuit. Pulses are counted during a time interval corresponding to the temperature characteristic of the light measuring circuit so as to obtain a count value corresponding to the light input free of the influence of temperature.

REFERENCES:
patent: 3820126 (1974-06-01), Haratake
patent: 3863263 (1975-01-01), Itagaki

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