US Patent 7977440 Optical element and optical pickup apparatus
Patent 7977440 was granted and assigned to Konica Minolta on July, 2011 by the United States Patent and Trademark Office.
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Patent abstract
A production method of an objective lens for optical pickup apparatus having a numerical aperture NA of image side of 0.80 to 0.90 is disclosed. The method includes steps of molding resin composition containing copolymer of α-olefin and a cyclic olefin represented by Formula (I) or (II) to form lens shape, and thermally processing the molded product under a condition at a temperature between Tg −45° C. and Tg −15° C. for 12 to 168 hours, wherein the Formula (I) and (II) is detailed in the specification.
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Patent Inventor Names
Yayoi Eguro0
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US Patent 07977440 Optical element and optical pickup apparatus US Patent 7977440 Optical element and optical pickup apparatus
Infobox
Patent Number
079774400
Patent Number
79774400
Edits on 21 Mar, 2023
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
079774400
Date of Patent
July 12, 2011
0Patent Application Number
124820370
Date Filed
June 10, 2009
0Patent Primary Examiner
Edits on 8 Dec, 2021
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US Patent 07977440 Optical element and optical pickup apparatus
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07977440
Date of patent
July 12, 2011
Patent application number
12482037
Date Filed
June 10, 2009
Patent primary examiner
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