Optical disc recording and/or reproducing apparatus and...

Details Optical disc recording and/or reproducing apparatus and... Optical disc recording and/or reproducing apparatus and...

2007-08-14

2007-08-14

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044230, C369S112020, C369S121000, C369S123000

Reexamination Certificate

active

11159231

ABSTRACT:
The astigmatic aberration in an optical system is to be adjusted. Specifically, in an optical disc device on which can be selectively loaded a first optical disc having a first index of double refraction or a second optical disc having a second index of double refraction larger than said first index of double refraction, and which includes a liquid crystal device31between a light source11and an objective lens15converging a light beam radiated from said light source on the optical disc2loaded on the optical disc device, the voltage applied to the liquid crystal device31is adjusted to correct the coma aberration or the astigmatic aberration for the first disc or the second disc, respectively.

REFERENCES:
patent: 5859818 (1999-01-01), Tateishi et al.
patent: 5859822 (1999-01-01), Inoue et al.
patent: 5910937 (1999-06-01), Akiba et al.
patent: 5936923 (1999-08-01), Ootaki et al.
patent: 6078554 (2000-06-01), Ootaki et al.
patent: 6151154 (2000-11-01), Ogasawara et al.
patent: 6411577 (2002-06-01), Hirose
patent: 6532202 (2003-03-01), Wada et al.
patent: 6940798 (2005-09-01), Noborimoto et al.
patent: 08212583 (1996-08-01), None
patent: 08321065 (1996-12-01), None
Patent Abstracts of Japan, JP 2000-067453, Mar. 3, 2000.

Affiliated with

Also associated with

Rating

Optical disc recording and/or reproducing apparatus and... 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 disc recording and/or reproducing apparatus and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc recording and/or reproducing apparatus and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3894882