Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Teruhiko Itoh0
Akira Sawagami0
Date of Patent
February 2, 2010
0Patent Application Number
113539990
Date Filed
February 15, 2006
0Patent Primary Examiner
Patent abstract
An objective lens unit for an optical pickup device which is composed of a first optical element including a first element body positioned on an optical information recording medium side and a first annular portion formed on the outer periphery of the first element body, and further composed of a second optical element including a second element body and a second annular light source side of the first element body and a second annular portion formed on the outer periphery of the second element body and coupled to the first annular portion, and at least one of the first and second annular portion has a portion in which the size of outer shape is smaller than the vicinity on at least a part of the light source side.
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