Optical pickup apparatus which is compatible with multiple...

Details Optical pickup apparatus which is compatible with multiple... Optical pickup apparatus which is compatible with multiple...

2006-01-11

2008-10-14

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C369S112160, C369S112200

Reexamination Certificate

active

07435934

ABSTRACT:
An optical pickup apparatus includes a first objective lens having a low numerical aperture (NA) suitable for a low density recording medium, a second objective lens having a high NA suitable for a high density recording medium, a first light source that emits short wavelength light which is focused onto an optical recording medium by the first and second objective lenses, a first photodetector that receives a returning reflected light from the optical recording medium, and a first optical path converter for selectively guiding part of the light emitted from the first light source towards the first or the second objective lens, and guiding the reflected light towards the first photodetector.

REFERENCES:
patent: 5784354 (1998-07-01), Lee
patent: 2004/0160888 (2004-08-01), Kim
patent: 2004/0190423 (2004-09-01), Yagi et al.
patent: 2005/0094537 (2005-05-01), Ikenaka et al.
patent: 1187002 (1998-07-01), None
patent: 1497553 (2004-05-01), None
patent: 1534641 (2004-10-01), None
patent: 09-212905 (1997-08-01), None
patent: 2001-273669 (2001-10-01), None
patent: 2004-145907 (2004-05-01), None
patent: 2004-319062 (2004-11-01), None
patent: 100245666 (1999-11-01), None
patent: 10-2004-0021324 (2004-03-01), None

Affiliated with

Also associated with

Rating

Optical pickup apparatus which is compatible with multiple... 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 pickup apparatus which is compatible with multiple..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup apparatus which is compatible with multiple... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4014462