Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1997-01-03
2000-03-21
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349116, 349172, 283 73, 283 74, 283 75, 283 86, 380 54, 359 11, 350 366, 350342, G02F 1133, G02F 113
Patent
active
060408839
ABSTRACT:
A programmable hologram generator comprises a layered structure of a pixelated VLSI chip, a reflective ferroelectric liquid crystal that is physically disposed on the VLSI chip, and a photorefractive crystal that is physically disposed on the liquid crystal. The VLSI chip is controlled by a computer wherein holograms are digitally stored. The reflective state of the individual pixel areas of the liquid crystal are controlled or selected by this computer control of the VLSI chip. A desired hologram is written into the photorefractive crystal by a reference beam that illuminates the photorefractive crystal, and by an illumination beam that is reflected from the selected pixels of the liquid crystal and thereafter interferes with the reference beam. The hologram that is written into the photorefractive crystal is a function of the control of the reflective state of the pixels of the liquid crystal, as this reflective state is in turn controlled by the pixels of the VLSI chip.
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Johnson Kristina M.
Mao Chong Chang
Ngo Julie
Sikes William L.
University Technology Corporation
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