Holographic data storage with PDLC spatial light modulator...

Details Holographic data storage with PDLC spatial light modulator... Holographic data storage with PDLC spatial light modulator...

2007-04-10

2007-04-10

Schechter, Andrew (Department: 2871)

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Optical excitation

C359S011000, C369S103000, C369S112020

Reexamination Certificate

active

10889728

ABSTRACT:
The invention is directed to a holographic data storage system including a spatial light modulator device (SLM) that comprises optical elements in the form of polymer dispersed liquid crystal (PDLC) elements. The PDLC elements are individually controllable, and can be made substantially transparent or substantially diffusive. The “on” or “off” state of each PDLC element is defined by whether the given PDLC element is transparent or diffusive. Additional states may also be defined for the PDLC elements, e.g., based on a level of diffusiveness of the PDLC elements. Also, a mirror layer may be added adjacent the PDLC elements to define a reflective-mode SLM. In any case, the SLM is used to encode bit maps into a holographic object beam.

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Chapter 6: Technical Evaluation of Work, http://www.wtec.org/loyola/dsply—jp/c6—s3.htm.
“Spatial Light Modulator Device With Diffusive Element,” U.S. Appl. No. 10/889,727, filed Jul. 13, 2004.

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