US Patent 7876648 Optical pick-up capable of eliminating stray beams
Patent 7876648 was granted and assigned to Sanyo on January, 2011 by the United States Patent and Trademark Office.
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Patent abstract
An optical element is disposed on an optical path between a beam branching element and a photodetector. The optical element is disposed at a focal position of a stray light beam reflected by a recording layer except a target recording layer, and shields or attenuates the light beam in a region where the stray light beam converges.
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Patent Inventor Names
Katsutoshi Hibino0
Kazushi Mori0
Naoyuki Takagi0
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Official Website
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US Patent 07876648 Optical pick-up capable of eliminating stray beams US Patent 7876648 Optical pick-up capable of eliminating stray beams
Infobox
Patent Number
078766480
Patent Number
78766480
Edits on 27 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
078766480
Date of Patent
January 25, 2011
0Patent Application Number
119456730
Date Filed
November 27, 2007
0Official Website
Patent Primary Examiner
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US Patent 07876648 Optical pick-up capable of eliminating stray beams
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07876648
Date of patent
January 25, 2011
Patent application number
11945673
Date Filed
November 27, 2007
Patent primary examiner
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