Optical information processing apparatus, optical pick-up...

Details Optical information processing apparatus, optical pick-up... Optical information processing apparatus, optical pick-up...

2011-05-24

2011-05-24

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

07948858

ABSTRACT:
An optical pick-up device includes a laser source enabling emission of at least two light beams with different wavelengths, an objective lens which focuses the light beams emitted from the laser source on an optical disc, an optical detector which receives a light reflected from the optical disc, a front monitor which receives a part of the light beams emitted from the laser source, a front monitor light-guiding plate which guides part of the light beams emitted from the laser source to the front monitor. The front monitor light-guiding plate is arranged between the laser source and the objective lens, at least a part of a region of the front monitor light-guiding plate illuminated by the light beams emitted from the laser source has a predetermined shape which causes the light beams to change traveling direction thereof by refraction and then be guided to the front monitor.

REFERENCES:
patent: 4896543 (1990-01-01), Gullman
patent: 5290972 (1994-03-01), Someya
patent: 5475210 (1995-12-01), Taguchi et al.
patent: 6346695 (2002-02-01), Yanagawa
patent: 6510119 (2003-01-01), Takeshita
patent: 7177259 (2007-02-01), Nishi
patent: 7177260 (2007-02-01), Kim et al.
patent: 7298688 (2007-11-01), Kim
patent: 2001/0048063 (2001-12-01), Yanagawa et al.
patent: 285773 (1988-12-01), None
patent: 1503189 (2005-02-01), None
patent: 2301896 (1996-12-01), None
patent: 6-267100 (1994-09-01), None
patent: 8-36797 (1996-02-01), None
patent: 11-273119 (1999-10-01), None
patent: 2000-100069 (2000-07-01), None
patent: 2001-184709 (2001-07-01), None
patent: 2002-358156 (2002-12-01), None
patent: 2003-77170 (2003-03-01), None
patent: 2004-227680 (2004-08-01), None
patent: 2005-18955 (2005-01-01), None

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