Solid state infrared chopper

Details Solid state infrared chopper Solid state infrared chopper

1997-12-30

1999-10-12

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250351, 359245, G01J 506

Patent

active

059658908

ABSTRACT:
A chopper is provided of solid state construction. Two layers are provided adjacent one another with the area between the layers defining one or more diffusion zones. One or more voltage potentials may be applied across the second layer to correspond to the diffusion zones. At an initial state the voltage potentials are either zero or some predetermined value which causes the index of refraction of the two layers to be substantially the same. At a second state the voltage potential equals some predetermined value to cause the index of refraction of the second layer to be different from that of the first layer. The difference in index of refraction between the layers creates a diffraction grating in the respective diffusion zone to diffuse that portion of an incident signal passing through the diffusion zone.

REFERENCES:
patent: 4115747 (1978-09-01), Sato et al.
patent: 5337183 (1994-08-01), Rosenblatt

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