Process and apparatus for measuring small quantities of light

Details Process and apparatus for measuring small quantities of light Process and apparatus for measuring small quantities of light

1992-08-13

1994-04-26

Rosenberger, Richard A.

Optics: measuring and testing

Photometers

Integrating

307311, 250214A, 356218, G01J 144

Patent

active

053071450

ABSTRACT:
A light receiver converts light to be measured into an electrical signal, which during a measuring interval is integrated into a measuring signal. In a first time segment a first mean value signal is formed, corresponding to the mean value of the measuring signal over the first time segment. In a second time segment of equal duration, a second mean value signal is formed within the same measuring interval, corresponding to the mean value of the measuring signal over the second time segment. Finally a difference signal is formed corresponding to the difference of the two mean value signals and constituting a measure of the light received. The difference signal is passed on for further signal processing.

REFERENCES:
patent: 4666301 (1987-05-01), Gruenke

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