Optical disk apparatus and tilt detection method

Details Optical disk apparatus and tilt detection method Optical disk apparatus and tilt detection method

2006-08-08

2006-08-08

Miller, Brian E. (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S118000, C369S044320, C369S044240, C369S112280

Reexamination Certificate

active

07088659

ABSTRACT:
An optical disk apparatus includes a laser diode, and a light from the laser diode becomes a parallel light by a collimator lens, which is reflected toward an object lens by a reflection mirror. The parallel light transmitted through a through-hole provided on an object lens holder is reflected by a disk, and a reflected light is incident upon a light-receiving sensor via the collimator lens, a polarizing beam splitter and a prism. The parallel light reflected by the reflection mirror is reflected by a mirror integrated with the object lens holder, and incident upon the light-receiving sensor via the collimator lens, the polarizing beam splitter and the prism. A disk tilt and/or an object lens tilt are/is detected from output signals of divided light-receiving sensors of the light-receiving sensor.

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