Optical element having a low surface roughness, an optical...

Details Optical element having a low surface roughness, an optical... Optical element having a low surface roughness, an optical...

2007-02-20

2007-02-20

Psitos, A M (Department: 2627)

Stock material or miscellaneous articles

Composite

Of silicon containing

Reexamination Certificate

active

09670839

ABSTRACT:
An optical pickup device for recording and/or reproducing information in an optical information recording medium, comprises a light source to emit light flux having a central wavelength not longer than 500 nm; a converging optical system to converge the light flux emitted from the light source onto an information recording surface of the optical information recording medium; and an optical detector to detect light flux reflected from the information recording surface of the optical information recording medium or the light flux passing through the information recording surface of the optical information recording medium; wherein the converging optical system or the optical detector comprises at least one optical element and the optical element comprises at least one optical surface having a center-line mean roughness Ra of 5 nm or less.

REFERENCES:
patent: 5168404 (1992-12-01), Miyazaki et al.
patent: 5181141 (1993-01-01), Sato et al.
patent: 5436764 (1995-07-01), Umetani et al.
patent: 5481530 (1996-01-01), Ueda et al.
patent: 5700307 (1997-12-01), Kashiwagi et al.
patent: 5748482 (1998-05-01), Nishimura
patent: 5759221 (1998-06-01), Kashiwagi et al.
patent: 5759457 (1998-06-01), Inoue et al.
patent: 5995304 (1999-11-01), Nomura et al.
patent: 6003336 (1999-12-01), Kashiwagi et al.
patent: 6009728 (2000-01-01), Kashiwagi et al.
patent: 6119485 (2000-09-01), Hibino et al.
patent: 6314064 (2001-11-01), Ueda et al.
patent: 6504975 (2003-01-01), Yamagata et al.
patent: 6552990 (2003-04-01), Kajiyama et al.
patent: 11-268920 (1999-05-01), None
MAT (machine assisted translation of) JP 11-268920.
MAT (Machine assisted translation of) JP 11-207751, pub. date of Mar. 1999.

Affiliated with

Also associated with

Rating

Optical element having a low surface roughness, an optical... 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 element having a low surface roughness, an optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical element having a low surface roughness, an optical... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3831433