Optical information recording apparatus and optical...

Details Optical information recording apparatus and optical... Optical information recording apparatus and optical...

2004-07-07

2008-08-05

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

07408865

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.

REFERENCES:
patent: 4700336 (1987-10-01), Yoshida et al.
patent: 5940514 (1999-08-01), Heanue et al.
patent: 7227827 (2007-06-01), Horimai et al.
patent: 2003/0021493 (2003-01-01), Nakaya et al.
patent: 2003/0031112 (2003-02-01), Horimai
patent: 2003/0090969 (2003-05-01), Matsumoto et al.
patent: 2003/0231573 (2003-12-01), Matsumoto et al.
patent: 61269243 (1986-11-01), None
English translation of the Abstract of JP 61-269243.

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