Objective lens, optical pickup apparatus and optical disc...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07623434

ABSTRACT:
An objective optical lens for use in an optical pickup apparatus, includes: an optical surface divided into at least two areas including: a central area including a first diffractive structure; and a peripheral area including a second diffractive structure, the objective lens is a single lens and is commonly used for the first to third optical information recording media, the objective lens converges diffracted light fluxes with same diffraction order generated in the first diffractive structure onto information recording surfaces of the first to third optical information recording media, respectively, the objective lens converges diffracted light fluxes with different diffraction order generated in the second diffractive structure onto information recording surfaces of the first and second optical information recording media, respectively.

REFERENCES:
patent: 6791932 (2004-09-01), Maruyama
patent: 7038862 (2006-05-01), Maruyama et al.
patent: 7102980 (2006-09-01), Saito et al.
patent: 7200079 (2007-04-01), Ikenaka et al.
patent: 7239598 (2007-07-01), Maruyama et al.
patent: 2004/0047269 (2004-03-01), Ikenaka et al.
patent: 2004/0100703 (2004-05-01), Kimura et al.
patent: 2004/0246873 (2004-12-01), Maruyama et al.
patent: 2005/0036430 (2005-02-01), Ikenaka
patent: 1 445 768 (2004-08-01), None
European Search Report dated Nov. 6, 2008.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Objective lens, optical pickup apparatus and 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 Objective lens, optical pickup apparatus and optical disc..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Objective lens, optical pickup apparatus and optical disc... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4123932

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.