Title:
プラスチックレンズ
Document Type and Number:
Japanese Patent JP4025387
Kind Code:
B2
Abstract:
A plastic lens includes an optically functioning section, a flange section disposed at an outer periphery thereof, a reference surface formed at an outer peripheral portion of the flange section and adapted to become a reference for attachment, and a tapered surface formed on at least a part of the outer peripheral portion of the flange section which is located closer to the optically functioning section side than is the reference surface so as to taper down its diameter along the optical axis of the optically functioning section. The tapered surface forms a surface at which a gate for resin injection is located upon manufacture.
Inventors:
Nomura Nomitsu
Masaaki Fukuda
Takashi Ito
Yagi
Masaaki Fukuda
Takashi Ito
Yagi
Application Number:
JP8153397A
Publication Date:
December 19, 2007
Filing Date:
March 31, 1997
Export Citation:
Assignee:
Fujinon Co., Ltd.
International Classes:
G02B1/04; G02B3/00; B29C45/00; B29D11/00; G02B7/02; G11B7/1372; G11B7/135
Domestic Patent References:
| JP8160201A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Tatsuya Shioda
Shiro Terasaki
Yuichi Yamada
Tatsuya Shioda
Shiro Terasaki
Yuichi Yamada