Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2011-08-09
2011-08-09
Hindi, Nabil Z (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
07995445
ABSTRACT:
An optical pickup apparatus includes: a light source to irradiate light onto a hologram recording medium onto which information is recorded by interference fringes of signal light and reference light; a spatial light modulation portion to generate the reference light by performing a spatial light modulation on the light from the light source; and an optical system to irradiate the reference light onto the hologram recording medium via a relay lens system and an objective lens and guide reproduction light obtained from the hologram recording medium in accordance with the irradiation of the reference light to an image pickup device via the objective lens and the relay lens system, the optical system being provided with, in an optical path between the relay lens system and the image pickup device, an angle permselective device that selectively transmits light with an incidence angle of a predetermined angle or less.
REFERENCES:
patent: 7782732 (2010-08-01), Minabe et al.
patent: 2007-079438 (2007-03-01), None
patent: 4289921 (2009-04-01), None
Tanaka Kenji
Yamakawa Akio
Hindi Nabil Z
Sony Corporation
Wolf Greenfield & Sacks P.C.
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