Optical pickup apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Mar 8, 2007
app pub date -
Sep 1, 2006
filing date -
Sep 5, 2005
priority date (Note) -
Published
status (Latency Note)
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Abstract
An optical pickup apparatus having first and second light sources emitting first and second light fluxes having wavelength of .lamda.1 and .lamda.2, respectively, an light-converging optical system including first and second objective optical elements, and a lens holder to hold the first and second objective optical elements. When the optical pickup apparatus converges the first or the second light flux onto first or second information recording surface of first or second information recording medium through one protective substrate, which has a thickness of t1 or t2 and is provided on the first or second information recording surface, with utilizing the first or second objective optical element for conducting information recording and/or information reproducing of the first or second information recording medium, a variation of each of a coma aberration and an astigmatism is not more than 0.02 .lamda.1 rms or 0.02 .lamda.2 rms, respectively.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | A | JP2007073094 | Sep 05, 2005 |
International Classification(s)
- 2006 Application Filing Year
- G11B Class
- 3214 Applications Filed
- 1613 Patents Issued To-Date
- 50.19 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- G11B Class
- 4.39 % this patent is cited more than
- 18 Age