Optical pick-up apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 21, 2008
Grant Date -
Dec 22, 2005
app pub date -
May 2, 2005
filing date -
May 12, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical pickup apparatus for conducting recording and/or reproducing information of an optical information recording medium, comprises a light source; a converging optical system having an objective lens; and a photo-detector. The converging optical system comprises a plastic lens and a spherical aberration deviation correcting element to correct deviation of a spherical aberration of the converging optical system. A numerical aperature of the objective lens at an image-side is 0.65 or more.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully