Variably transmissive filter

Details Variably transmissive filter Variably transmissive filter

1985-11-15

1988-02-09

LaRoche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250205, 350339F, G01J 124, G02F 113

Patent

active

047243112

ABSTRACT:
A variably transmissive filter is comprised of a plurality of adjustable transmissive elements for receiving incident radiation. A circuit is responsive to the incident radiation for providing an indication of the intensity thereof. Another circuit adjusts the degree of transmission of the elements in response to the intensity of the incident radiation such that the amount of incident radiation transmitted through the elements is controlled.

REFERENCES:
patent: 3655269 (1972-04-01), Heilmeier
patent: 3944817 (1976-03-01), Hilsum et al.
patent: 3986022 (1976-10-01), Hyatt
patent: 4155122 (1979-05-01), Budmiger
patent: 4601537 (1986-07-01), Saccocio

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