Title:
WAVE LENGTH PLATE
Document Type and Number:
Japanese Patent JP2005164834
Kind Code:
A
Abstract:
To provide a wave length plate for optical information recording/reproducing apparatus, the plate having excellent initial characteristics and long-term reliability hardly influenced by the use environment or the manufacturing environment.
The wave plate comprises two or more retardation films, in which retardation films are not adhered to each other in a part where laser light transmits.
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Inventors:
SEKIGUCHI MASAYUKI
USHINO TAKUHIRO
HIRONO TATSUYA
USHINO TAKUHIRO
HIRONO TATSUYA
Application Number:
JP2003401690A
Publication Date:
June 23, 2005
Filing Date:
December 01, 2003
Export Citation:
Assignee:
JSR CORP
International Classes:
G02B5/30; (IPC1-7): G02B5/30
Attorney, Agent or Firm:
Shigetaka Shirai