Method and apparatus for recording/reproducing data on/from...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

Reexamination Certificate

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C369S120000, C369S044410

Reexamination Certificate

active

07983134

ABSTRACT:
A method and apparatus for recording/reproducing data is disclosed. The apparatus for recording/reproducing data comprises a diffraction element splitting light diffracted or reflected from a recording medium into a main beam and first and second sub beams, the main beam and the first and second sub beams having no interference from one another; a light-receiving part detecting the main beam and the first and second sub beams; and a controller controlling a position of the diffraction element based on at least one light capacity of the detected beams or the detected position.

REFERENCES:
patent: 2007/0189130 (2007-08-01), Anzai et al.
patent: 2009/0028035 (2009-01-01), Sano et al.
patent: WO 2006118082 (2006-11-01), None

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