Title:
光学素子及び該光学素子を備えた光ピックアップ装置
Document Type and Number:
Japanese Patent JP4349179
Kind Code:
B2
Abstract:
An optical element of this invention includes a lens portion serving as an optical function surface and a flange portion whose outer periphery is formed rectangularly at the periphery of the lens portion. The optical element is molded by injecting a resin from a resin injection port located at a position corresponding to a corner of the flange portion in a mold. There is also provided an optical element wherein a cutting portion of a resin injected from a resin injection port of a mold which molds the optical element is formed at one corner of the flange portion. There is further provided an optical pickup device using the optical axis as a collimator lens.
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Inventors:
Teruhiko Ito
Toshiyuki Kojima
Toshiyuki Kojima
Application Number:
JP2004094548A
Publication Date:
October 21, 2009
Filing Date:
March 29, 2004
Export Citation:
Assignee:
Konica Minolta Opto Co., Ltd.
International Classes:
G02B3/00; G11B7/135; B29C45/27; B29C45/34; G02B7/02; G11B7/1376; G11B7/22; B29L11/00
Domestic Patent References:
| JP3033801A | ||||
| JP4341808A | ||||
| JP2001021783A | ||||
| JP2001331967A | ||||
| JP9115170A | ||||
| JP2004354473A |