Optical pickup apparatus and beam splitter

Details Optical pickup apparatus and beam splitter Optical pickup apparatus and beam splitter

2008-03-13

2010-10-19

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112010, C369S112100

Reexamination Certificate

active

07817509

ABSTRACT:
There is provided an optical pickup apparatus and a beam splitter which are capable of suppressing an adverse effect resulting from light reflected by a non-light-condensed layer that is different from a light-condensed layer. In respective TES light-receiving sections, interposed light-receiving elements are disposed so as to be adjacent to first sub beam-receiving elements. The interposed light-receiving elements are disposed away from both of positions where a main beam reflected by a light-condensing recording layer is condensed and where respective sub beams reflected by the light-condensing recording layer are condensed, and disposed so as to be adjacent to the first sub beam-receiving elements. The interposed light-receiving elements receive the main beam reflected by a non-light-condensing recording layer In a compensating section, results of light received by the first sub beam-receiving elements are compensated based on results of light received by the interposed light-receiving elements.

REFERENCES:
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patent: 2007/0025228 (2007-02-01), Matsubara et al.
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patent: 2007-59031 (2007-03-01), None

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