Optical pickup for cutting off optical noise and optical...

Details Optical pickup for cutting off optical noise and optical... Optical pickup for cutting off optical noise and optical...

2008-04-08

2008-04-08

Patel, Gautam R. (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S047500

Reexamination Certificate

active

07355953

ABSTRACT:
An optical pickup includes a light source which emits light, a grating which separates a portion of the light emitted from the light source, a reflecting member which reflects another portion of the light emitted from the light source, a monitoring photodetector disposed on a traveling path of the light reflected from the reflecting member and which measures the reflected light, an optical path changer which changes an optical path of the light separated by the grating, an objective lens light which condenses the light the optical path of which is changed onto a disc, and a signal detecting photodetector which receives the light reflected from the disc.

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patent: 10-294886 (2004-04-01), None

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