Holographic information recording apparatus

Details Holographic information recording apparatus Holographic information recording apparatus

2004-07-07

2008-09-23

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

07428206

ABSTRACT:
It is an object of the invention to improve a recording capacity density by removing part of diffracted light and by making a recording region in relation to a recording medium in the efficient shape. An optical information recording apparatus in which holography is formed in an optical information recording medium by making information light reflected by a spatial modulator interfere with reference light, is provided with a diffracted light removal means which removes part of diffracted light of the reflected light, and whose aperture is in the shape of a square.

REFERENCES:
patent: 3716286 (1973-02-01), St. John et al.
patent: 4104489 (1978-08-01), Satoh et al.
patent: 5319629 (1994-06-01), Henshaw et al.
patent: 5426521 (1995-06-01), Chen et al.
patent: 7236442 (2007-06-01), Sugiki et al.
patent: 2005/0083799 (2005-04-01), Horimai
patent: 2006/0050544 (2006-03-01), Horimai

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