Diffractive focusing using multiple selectively light opaque...

Details Diffractive focusing using multiple selectively light opaque... Diffractive focusing using multiple selectively light opaque...

2005-05-03

2005-05-03

Chowdhury, Tarifur R. (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal optical element

Liquid crystal diffraction element

C359S573000

Reexamination Certificate

active

06888613

ABSTRACT:
A diffractive focusing device includes a light transmissive substrate and a plurality of selectively light opaque elements formed in the light transmissive substrate. The selectively light opaque elements are capable of being electronically activated. Particular elements of the plurality of selectively light opaque elements are selectively rendered substantially light opaque or substantially light-transmissive in order to create light transmissive channels in the light transmissive substrate with desired diffractive characteristics.

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