Optical informational recording/reproduction device and method
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United States of America Patent
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Mar 8, 2011
Grant Date -
Aug 14, 2008
app pub date -
May 13, 2004
filing date -
May 13, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
An optical information recording device, a reproduction device, and a method enabling include a first spatial light modulator I for generating information light by spatially modulating light from a light source 143 by a plurality of pixels and a second spatial light modulator R for generating reference light by spatially modulating light from a light source by a plurality of pixels. The area I of the information light and the area R of the reference light on the entrance pupil surface of an objective lens 111 are formed such that one area surrounds the other area. The reference light is spatially modulated by the second spatial light modulator R such that interference is not easily generated between the reference lights in the information recording layer 3.
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