Title:
OPTICAL MOLDING MATERIAL AND OPTICAL DISK
Document Type and Number:
Japanese Patent JP2001126311
Kind Code:
A
Abstract:
To obtain a stable molding material having a low rate of change of an optical characteristic (retardation) in a wide wavelength range and suitable for optical use and to obtain an optical disk capable of reading and writing with plural lasers because of good optical characteristics in a wide wavelength range.
The optical molding material is a cyclic polyolefin resin and the width of change of the retardation of the resin when the wavelength of light is varied from 400 nm to 830 nm is <±10% of the retardation at 590 nm wavelength. The optical disk is obtained by molding the resin.
Inventors:
SEKIGUCHI MASAYUKI
OTSUKI TOSHITAKA
ISHIGAKI TAKATOSHI
HIRONO TATSUYA
OTSUKI TOSHITAKA
ISHIGAKI TAKATOSHI
HIRONO TATSUYA
Application Number:
JP30473799A
Publication Date:
May 11, 2001
Filing Date:
October 26, 1999
Export Citation:
Assignee:
JSR CORP
International Classes:
C08F32/00; G02B1/04; G11B7/24047; G11B7/2533; G11B7/2538; (IPC1-7): G11B7/24; C08F32/00; G02B1/04
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