Optical pickup lens capable of detecting the tilt state

Details Optical pickup lens capable of detecting the tilt state Optical pickup lens capable of detecting the tilt state

2008-09-30

2011-12-27

Huber, Paul (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S121000

Reexamination Certificate

active

08085646

ABSTRACT:
An optical pickup lens includes a first surface to focus laser light for recording/playback on an optical disc, a second surface formed outside the first surface and radiated with laser light for lens tilt detection, and an antireflection coating to transmit the laser light for recording/playback, the antireflection coating being continuously formed on the first surface and a second surface.

REFERENCES:
patent: 4532522 (1985-07-01), Tsunoda et al.
patent: 5883709 (1999-03-01), Okuda et al.
patent: 5995304 (1999-11-01), Nomura et al.
patent: 2007/0201327 (2007-08-01), Kabasawa
patent: 06-267103 (1994-09-01), None
patent: A-2003-222707 (2003-08-01), None
Aug. 16, 2011 Japanese Office Action in Application No. 2007-277105 (with translation).

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