Title:
OPTICAL ELEMENT MADE OF PLASTIC AND OPTICAL PICKUP DEVICE
Document Type and Number:
Japanese Patent JP2004144953
Kind Code:
A
Abstract:
To provide a plastic-made optical element capable of easily maintaining excellent pickup characteristics by manufacturing a lens capable of maintaining highly accurate optical characteristics for a long time, and an optical pickup apparatus.
This plastic-made optical element is molded by adding an additive for reducing a refractive index by decomposing corresponding to irradiation of light to a resin composition with the refractive index increased with time corresponding to irradiation of light. The optical pickup apparatus using the plastic-made optical element is manufactured.
Inventors:
EGURO YAYOI
HATTORI HIROYUKI
SHIN YUICHI
YAMASHITA KIYOSHI
HATTORI HIROYUKI
SHIN YUICHI
YAMASHITA KIYOSHI
Application Number:
JP2002308964A
Publication Date:
May 20, 2004
Filing Date:
October 23, 2002
Export Citation:
Assignee:
KONICA MINOLTA HOLDINGS INC
International Classes:
G02B5/18; C08F8/04; C08F210/00; C08F232/00; C08F291/00; C08G61/08; C08L23/02; C08L51/00; C08L65/00; G02B1/04; G02B5/32; G11B7/004; G11B7/135; (IPC1-7): G02B1/04; C08F8/04; C08F210/00; C08F232/00; C08F291/00; C08G61/08; C08L23/02; C08L51/00; C08L65/00; G02B5/18; G02B5/32; G11B7/004; G11B7/135
Attorney, Agent or Firm:
Hiroshi Arafune
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