Optical informational recording/reproduction device and method

Details Optical informational recording/reproduction device and method Optical informational recording/reproduction device and method

2011-03-08

2011-03-08

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Holographic system or element

Using modulated or plural reference beams

C359S011000, C359S022000, C359S035000

Reexamination Certificate

active

07903309

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 source143by 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 lens111are 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 layer3.

REFERENCES:
patent: 5940514 (1999-08-01), Heanue et al.
patent: 6108110 (2000-08-01), Orlov et al.
patent: 2003/0063342 (2003-04-01), Horimai

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