Title:
光ピックアップ装置およびその受光方法
Document Type and Number:
Japanese Patent JP3603002
Kind Code:
B2
Abstract:
In an optical pickup device, a first light source and a second light source, light emission points of which are not on an identical optical axis, are provided. A first laser light beam and a second laser light beam, wavelengths of which are different from each other, are respectively emitted from the first and second light sources. The first and second laser light-beams reflected from an optical recording medium are diffracted based on different diffraction order, such that the diffracted first and second laser light beams are received by a common light receiving element.
Inventors:
Tadashi Takeda
Application Number:
JP2000065832A
Publication Date:
December 15, 2004
Filing Date:
March 10, 2000
Export Citation:
Assignee:
Sankyo Seiki Co., Ltd.
International Classes:
G11B7/09; G11B7/12; G11B7/125; G02B5/18; G11B7/127; G11B7/13; G11B7/1353; G11B7/1381; G11B7/00; (IPC1-7): G11B7/135; G02B5/18; G11B7/09; G11B7/12
Domestic Patent References:
| JP10320814A | ||||
| JP10289468A | ||||
| JP9128794A |
Attorney, Agent or Firm:
Shiro Yokozawa