Optical pickup apparatus for reading and recording...

Details Optical pickup apparatus for reading and recording... Optical pickup apparatus for reading and recording...

2006-04-25

2006-04-25

Nguyen, Hoa T. (Department: 2656)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112190, C369S118000

Reexamination Certificate

active

07035194

ABSTRACT:
An optical pickup apparatus for reading and recording information on recording media includes a semiconductor laser, a collimating lens, a half mirror, a reflecting mirror, and an objective lens. Further included therein are a super-resolution cutoff filter and an aperture control filter, one of which is appropriately selected and set right before the objective lens by a filter switching-over device. When reading the DVD, the super-resolution cutoff filter is set at the optical path, whereas when reading the CD, the aperture control filter is set thereat. The filter switching device is arranged separately from an actuator driving system having the objective lens integrally structured therewith.

REFERENCES:
patent: 5802036 (1998-09-01), Ohba et al.
patent: 6026072 (2000-02-01), Taira et al.
patent: 6321028 (2001-11-01), Kajiyama et al.
patent: 6660986 (2003-12-01), Matsumoto et al.
patent: A 2002-203334 (2002-07-01), None
Suhara, Optical and Electro-Optical Engineering Contact, vol. 33, No. 11, 1995.

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