Optical module and optical pickup including the same

Details Optical module and optical pickup including the same Optical module and optical pickup including the same

2004-04-30

2008-09-16

Feild, Joseph (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044410

Reexamination Certificate

active

07426172

ABSTRACT:
An optical pickup includes an optical module that detects an information signal and/or an error signal by radiating light to a recording medium and receives light reflected by the recording medium. The optical module includes a light source; an optical path changer that changes a path of light emitted from the light source; a main photodetector that receives light that is reflected off a recording medium back to the optical module to detect an information signal and/or an error signal; and a hologram element that generates an astigmatism of the light incident onto the optical module. Since most optical elements of the optical pickup except an objective lens are packaged in the optical module, the entire structure of the optical pickup can be simplified and the number of bonding points for fixing the optical elements of the optical pickup on a base can be reduced.

REFERENCES:
patent: 4750162 (1988-06-01), Tajima
patent: 5673241 (1997-09-01), Koyama et al.
patent: 5856961 (1999-01-01), Brazas et al.
patent: 6195315 (2001-02-01), Takahashi et al.
patent: 6266314 (2001-07-01), Fukakusa et al.
patent: 6507544 (2003-01-01), Ma et al.
patent: 2002/0024916 (2002-02-01), Ueyama et al.
patent: 2005/0030878 (2005-02-01), Park et al.
patent: 2005/0063263 (2005-03-01), Park et al.
patent: 2005/0094541 (2005-05-01), Kim et al.
patent: 2005/0117500 (2005-06-01), Kim et al.
patent: 1184309 (1998-06-01), None
patent: 1277711 (2000-12-01), None
patent: 11213424 (1999-08-01), None
patent: 2000-11443 (2000-01-01), None
patent: 2000228022 (2000-08-01), None
patent: 2000-353332 (2000-12-01), None
patent: 200292933 (2002-01-01), None
patent: 2002237080 (2002-08-01), None
patent: 2002-45364 (2002-06-01), None

Affiliated with

Also associated with

Rating

Optical module and optical pickup including the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical module and optical pickup including the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical module and optical pickup including the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3982524