Light intensity detection and measurement circuit for measuring

Details Light intensity detection and measurement circuit for measuring Light intensity detection and measurement circuit for measuring

1993-09-27

1995-02-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

327514, H01J 4014

Patent

active

053877900

ABSTRACT:
A circuit measures the intensity of a monitored light beam by generating a signal which is of a specific time duration corresponding to light intensity. The circuit utilizes a photosensitive element for receiving the light and producing a variable control signal in direct correspondence to the light intensity. A capacitor network is placed in series with the photosensitive element, wherein the time duration for discharging the capacitor network is directly correlated to the intensity of the collected light.

REFERENCES:
patent: 3748044 (1973-07-01), Liston
patent: 4614866 (1986-09-01), Liss et al.
patent: 4786797 (1988-11-01), Ely

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