Optical pickup unit having electro-optical element and...

Details Optical pickup unit having electro-optical element and... Optical pickup unit having electro-optical element and...

2006-02-28

2006-02-28

Patel, Gautam R. (Department: 2655)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S047550

Reexamination Certificate

active

07006411

ABSTRACT:
An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam reflected from the information recording medium, and a light blocking part selectively blocking a part of the light beam with respect to a radial direction. The light blocking part is provided in an optical path of the light beam centered on an optical axis.

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