Title:
OPTICAL PICK-UP DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/002196
Kind Code:
A1
Abstract:
Provided is an optical pick-up device which makes it possible to reduce the number of parts and operation steps for attaching a diffraction grating to a housing. An optical pick-up device (1) is provided with a diffraction grating (8) and a housing (2) on an optical axis between a laser light source (6) and an object lens (5). The diffraction grating (8) diffracts laser light emitted from the laser light source (6) and is housed in a housing chamber (20) in the housing (2). The housing chamber (20) has a shape which prevents the diffraction grating (8) from moving in a second direction perpendicular to a first direction in which a periodic structure repeats in the grating surface of the diffraction grating (8).
Inventors:
AKUTSU Takashi (5-5, Keihan-Hondori 2-chome, Moriguchi-sh, Osaka 77, 〒5708677, JP)
Application Number:
JP2011/064185
Publication Date:
January 05, 2012
Filing Date:
June 22, 2011
Export Citation:
Assignee:
SANYO Electric Co., Ltd. (5-5 Keihan-Hondori 2-chome, Moriguchi-shi Osaka, 77, 〒5708677, JP)
三洋電機株式会社 (〒77 大阪府守口市京阪本通２丁目５番５号 Osaka, 〒5708677, JP)
三洋電機株式会社 (〒77 大阪府守口市京阪本通２丁目５番５号 Osaka, 〒5708677, JP)
International Classes:
G11B7/12; G11B7/08
Attorney, Agent or Firm:
KADOYA Hiroshi (5-5, Keihan-Hondori 2-chome, Moriguchi-sh, Osaka 77, 〒5708677, JP)
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Claims: