Photometer circuitry for the digital indication of the light abs

Details Photometer circuitry for the digital indication of the light abs Photometer circuitry for the digital indication of the light abs

1975-04-21

1976-11-16

Corbin, John A.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

356223, G01N 2122

Patent

active

039921131

ABSTRACT:
Photometer circuitry includes a capacitor discharge means for establishing a time period related to the light absorption properties of a test sample. The time period is used, in conjunction with a frequency generator to drive a digital counter to provide a digital indication of light absorption.

REFERENCES:
patent: 3528749 (1970-09-01), Bowker
patent: 3664744 (1972-05-01), Liston
patent: 3843265 (1974-10-01), Egli

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