Optical head, optical disc device, computer, optical disc...

Details Optical head, optical disc device, computer, optical disc... Optical head, optical disc device, computer, optical disc...

2008-04-28

2011-11-29

Simpson, Lixi C (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112010

Reexamination Certificate

active

08068402

ABSTRACT:
An optical head is provided with a light source for outputting laser light having a wavelength of 430 nm or less; an objective lens for collecting the laser light outputted from the light source to an optical disc having a plurality of information recording surfaces; a light receiving element for receiving laser light reflected on the optical disc; and a detecting lens for guiding the laser light reflected on the optical disc to the light receiving element. The detecting lens is formed of a resin material. The detecting lens is arranged so that a light collecting position of the laser light reflected on an information recording surface different from an information recording surface having a thinnest protection substrate, among the information recording surfaces, is outside the detecting lens, at the time of recording or reproducing information on or from the information recording surface having the thinnest protection substrate.

REFERENCES:
patent: 4968874 (1990-11-01), Kasuga
patent: 5602383 (1997-02-01), Takekoshi et al.
patent: 5862118 (1999-01-01), Takahashi
patent: 6730896 (2004-05-01), Yamada
patent: 7142489 (2006-11-01), Nishiwaki et al.
patent: 7280453 (2007-10-01), Arai
patent: 7518976 (2009-04-01), Sano et al.
patent: 2002/0110053 (2002-08-01), Araki et al.
patent: 2004/0057369 (2004-03-01), Ikegame
patent: 2004/0213116 (2004-10-01), Arai
patent: 2004/0252612 (2004-12-01), Yamasaki et al.
patent: 2005/0036432 (2005-02-01), Kim et al.
patent: 2006/0013107 (2006-01-01), Nishiwaki et al.
patent: 2006/0077550 (2006-04-01), Sano et al.
patent: 2007/0223349 (2007-09-01), Shimada et al.
patent: 2008/0019254 (2008-01-01), Mori et al.
patent: 2008/0137513 (2008-06-01), Mori et al.
patent: 2008/0267019 (2008-10-01), Kimura et al.
patent: 2009/0219795 (2009-09-01), Yamanaka
patent: 1-302548 (1989-12-01), None
patent: 9-180244 (1997-07-01), None
patent: 2003-77163 (2003-03-01), None
patent: 2004-348941 (2004-12-01), None
patent: 2005-25923 (2005-01-01), None
patent: 2005-32423 (2005-02-01), None
patent: 2008-27507 (2008-02-01), None
patent: 2008-130167 (2008-06-01), None
patent: 2004/040562 (2004-05-01), None
patent: 2004/068480 (2004-08-01), None
patent: 2007/046284 (2007-04-01), None

Affiliated with

Also associated with

Rating

Optical head, optical disc device, computer, optical disc... 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 head, optical disc device, computer, optical disc..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical head, optical disc device, computer, optical disc... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4280069