Optical information recording apparatus and optical information reproducing apparatus using holography
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United States of America Patent
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Aug 5, 2008
Grant Date -
Feb 10, 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 record and reproduce information successfully even when light having small energy is used for hologram. A drive means to move a collimator lens according to movement of a recording medium is provided, and an angle of light for recording which enters from the collimator lens to a polarizing beam splitter is changed. In result, a position of light which enters the recording medium is shifted, and therefore, information can be recorded in a normal position of the recording medium, and information can be reproduced from the normal position on the recording medium according to movement of the recording medium.
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