Optical recording method, optical recording apparatus,...

Details Optical recording method, optical recording apparatus,... Optical recording method, optical recording apparatus,...

2007-07-18

2010-11-16

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112170, C369S112020

Reexamination Certificate

active

07835249

ABSTRACT:
The present invention provides an optical recording method and an optical recording apparatus for holographically recording information allowing for reductions in uneven consumption of the material through the thickness of a recording layer during recording to achieve high density recording and an increased recording capacity, an optical recording medium, and an optical reproducing method and an optical reproducing apparatus using the optical recording method. The optical recording method includes irradiating the optical recording medium with an information beam and a reference beam, dividing at least one of the information beam and the reference beam into two or more between a light source thereof and an optical recording medium, and adjusting the optical path lengths of the divided information beams and reference beams so that they focus on points different from each other through the thickness of the recording layer.

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patent: 2007/0146838 (2007-06-01), Toishi
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“Nikkey Electronics”, Jan. 17, 2005, pp. 105-114.
Office Action dated Sep. 14, 2010 on corresponding Japanese Application No. 2006-199305.

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