Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-10-16
2007-10-16
Hindi, Nabil (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
Reexamination Certificate
active
10926651
ABSTRACT:
A manufacturing method for an optical head device includes integrating at least a plurality of light sources and a plurality of diffraction elements with each other as an optical module, adjusting a relative positional relationship of the plurality of diffraction elements each other on the optical module, and then adjusting spot positions of the sub-beams on the optical recording medium by adjusting the entire optical module on the device frame. After that, the optical module is fixed on the device frame.
REFERENCES:
patent: 6633530 (2003-10-01), Takeda
Patent Abstracts of Japan, Publication No. 2000-251268, Publication Date Sep. 14, 2004 (Sharp Corp.) “Grating Adjustment Mechanism of Optical Pickup Apparatus”.
Patent Abstracts of Japan, Publication No. 2000-285494, Publication Date Oct. 13, 2000 (Sankyo Seiki Mfg. Co., Ltd.) “Optical Pickup Device”.
Patent Abstracts of Japan, Publication No. 2001-052355, Publication Date Feb. 23, 2001 (Victor Co. of Japan Ltd.) “Mthod for adjusting Grating of Optical Pickup”.
Patent Abstracts of Japan, Publication No. 2001-056955, Publication Date Feb. 27, 2001 (Sankyo Seiki Mfg. Co., Ltd.) “Optical Pickup Device”.
Fujimori Yasuo
Ishihara Hisahiro
Moriyama Katsuya
Hindi Nabil
NIDEC Sankyo Corporation
Reed Smith LLP
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