Optical pickup

Details Optical pickup Optical pickup

2007-02-20

2007-02-20

Tran, Thang V. (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S121000

Reexamination Certificate

active

10519027

ABSTRACT:
An optical pickup having a simple structure and that is capable of recording using a plurality of wavelengths is provided, comprising a primary laser light source for emitting a primary laser light having a first wavelength and that is of sufficient power for recording, an integrated device further comprising a secondary laser light source for emitting a secondary laser light having a second wavelength that is longer than the first wavelength and that is of sufficient power for recording as well as light receiving elements for receiving the light of the primary and secondary laser lights, and a polarized light beam splitter having polarization selectivity in respect of the secondary laser light.

REFERENCES:
patent: 5392274 (1995-02-01), Sofue
patent: 5428596 (1995-06-01), Hineno et al.
patent: 5513164 (1996-04-01), Tanaka et al.
patent: 6980505 (2005-12-01), Katayama et al.
patent: 06-325405 (1994-11-01), None
patent: 10-334500 (1998-12-01), None
patent: 2000-339745 (2000-12-01), None
patent: 2001-076370 (2001-03-01), None
patent: 2002-117572 (2002-04-01), None
patent: 2003-157568 (2003-05-01), None
Translation of JP 2001-076370.

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