Hologram recording device and hologram reproduction device

Details Hologram recording device and hologram reproduction device Hologram recording device and hologram reproduction device

2007-04-17

2007-04-17

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Holographic system or element

Having particular recording medium

C359S035000, C359S024000

Reexamination Certificate

active

10514826

ABSTRACT:
A hologram record apparatus (100) includes a spatial light modulator (15) and a control device (18). The spatial light modulator (15) is arranged on an optical path of signal light (L1) and divided into a plurality of cell blocks (151) arranged in a matrix. Each of the cell blocks (151) is further divided into a plurality of cells (152) arranged in a matrix. The spatial light modulator (15) can perform modulation on the cell basis. The control device (18) controls the spatial light modulator so as to modulate the signal light according to a plurality of record information sets to be recorded on a hologram record medium (200). Pluralities of modulation units (153) existing in the same cell block are not made into identical patterns. Since a plurality of cell blocks having a large pitch as compared to the pixel pitch are simultaneously or successively turned on/off, it is possible to reduce the distance between the zeroth-order light and the higher-order light.

REFERENCES:
patent: 6064586 (2000-05-01), Snyder et al.
patent: 6661725 (2003-12-01), Roh
patent: 6697316 (2004-02-01), Burr
patent: 2004/0145994 (2004-07-01), Tsukagoshi
patent: 9-197947 (1997-07-01), None

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