Spatial light modulator employing voltage gradient pixels,...

Details Spatial light modulator employing voltage gradient pixels,... Spatial light modulator employing voltage gradient pixels,...

2007-09-11

2007-09-11

Lester, Evelyn A. (Department: 2873)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S139000, C349S149000, C349S202000, C359S252000, C359S253000, C359S254000

Reexamination Certificate

active

11237129

ABSTRACT:
A spatial light modulator has a transmissive window with a transparent conductive film forming a ground plane and a direct drive backplane with a plurality of voltage gradient pixels. Each of the voltage gradient pixels has (a) resistive film, (b) resistive metal conductor frame on a boundary of the resistive film, and (c) conductive metal leads between a substrate of the direct drive backplane and the resistive metal frame. Differential voltages applied to the metal frame via the conductive metal leads generate a selective two-dimensional linear voltage gradient across the resistive film. A layer of liquid crystal material is disposed between the transmissive window and the voltage gradient pixels. Liquid crystal material of each voltage gradient pixel is responsive to an electric field generated by the voltage gradient to two-dimensionally alter phase of a wavefront incident thereon.

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