Holographic information recording apparatus
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United States of America Patent
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Sep 23, 2008
Grant Date -
Jan 13, 2005
app pub date -
Jul 7, 2004
filing date -
Jul 8, 2003
priority date (Note) -
Expired
status (Latency Note)
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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.
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