Transparent selective illumination means suitable for use in opt

Details Transparent selective illumination means suitable for use in opt Transparent selective illumination means suitable for use in opt

1990-02-02

1991-09-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250 211J, 25022732, 250551, 357 30, H01J 4014

Patent

active

050476238

ABSTRACT:
A planar transparent light conducting means and an improved optically activated electrical switch made using the novel light conducting means are disclosed. The light conducting means further comprise light scattering means on one or more opposite planar surfaces thereof to transmit light from the light conducting means into adjacent media and reflective means on other surfaces of the light conducting means not containing the light scattering means. The optically activated electrical switch comprises at least two stacked photoconductive wafers, each having electrodes formed on both surfaces thereof, and separated by the planar transparent light conducting means. The light scattering means on the light conducting means face surfaces of the wafers not covered by the electrodes to transmit light from the light conducting means into the photoconductive wafers to uniformly illuminate and activate the switch.

REFERENCES:
patent: 3952265 (1976-04-01), Hunsperger
patent: 4240088 (1980-12-01), Myers
patent: 4358676 (1982-11-01), Childs et al.
patent: 4533833 (1985-08-01), Copeland et al.
patent: 4691111 (1987-09-01), Bovino
patent: 4695120 (1987-09-01), Holder
patent: 4695733 (1987-09-01), Pseavento
patent: 4711997 (1987-12-01), Miller

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