Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tatsuya Hirono0
Masayuki Sekiguchi0
Date of Patent
November 17, 2009
0Patent Application Number
105815240
Date Filed
December 3, 2003
0Patent Primary Examiner
Patent abstract
A wavelength plate, which comprises a cyclic olefin based resin-containing material and is obtained by combining plural sheets of a retardation film that provides a specific retardation. The resulting wavelength plate (retardation plate) has the same polarizing characteristics against monochromic lights having a different wavelength and can be used as a wavelength plate for optical information recording and reproducing devices.
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