Process and a device for measuring transmission factors

Details Process and a device for measuring transmission factors Process and a device for measuring transmission factors

1974-04-09

1976-01-06

Lawrence, James W.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356206, G01H 2126

Patent

active

039315266

ABSTRACT:
A device for measuring transmission factors is comprised of an emitter of light impulses located at a distance from a main photoreceiver. The emitter and the main photoreceiver are optically conjugated by mirrors. An auxiliary photoreceiver located adjacent to the light emitter receives a constant portion of the flux emitted by this emitter and a flux coming from the ambient light. By establishing the ratio between the impulse-type electric signals transmitted by these photoreceivers, a value proportional to the transmission factor measured between the emitter and the main photoreceiver is obtained.

REFERENCES:
patent: 2427013 (1947-09-01), MacAdams
patent: 3091690 (1963-05-01), McHenry
patent: 3233781 (1966-02-01), Grubbs
patent: 3447370 (1969-06-01), Tanzman
patent: 3629589 (1971-12-01), Gleixner
patent: 3698820 (1972-10-01), Hanff et al.
patent: 3720813 (1973-03-01), Badessa
patent: 3745350 (1973-07-01), Hill et al.
patent: 3746452 (1973-07-01), Remy et al.
patent: 3788745 (1974-01-01), Menke

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