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Infrared-crystalline-spatial-light-modulator

Color display device having liquid crystal cell and fluorescent display with two different luminous sections

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Infrared crystalline spatial light modulator

Details

Inventors: Goldstein, Dennis H.; Wehling, Martin F.;
Assignee:
Primary Examiner: Arnold; Bruce Y.
Assistant Examiner:
Attorney, Agent or Firm: Donahue; Richard J., Singer; Donald J.

A spatial light modulator system having an electro-optic crystal responsive to infrared radiation. An electric field is established across opposed faces of the crystal, and the field is modulated on a point by point basis over one crystal face using a suitable charge distribution write source. Infrared radiation traversing the crystal is modified in polarization in accordance with the pattern imposed on the crystal to simulate an infrared target for testing infrared seekers.

DETAILED DESCRIPTION It is therefore the primary object of the present invention to provide electro-optic apparatus for modulating infrared radiation.
It is a more specific object of the present invention to provide a spatial light modulator for projecting infrared scenes.
In accordance with the present invention a crystal which exhibits the Pockels (birefringence) effect and is transparent to infrared radiation has an electric field established thereacross.
The field is modulate d On a point by point basis over one crystal face using a suitable charge producing source, such as an electron beam gun, or by the action of a laser beam on a photoconductive layer on the crystal.
Polarized infrared radiation traversing the crystal is modified in polarization in accordance with the charge pattern imposed on the face of the crystal.

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