Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2000-02-04
2004-08-17
Tran, Thang V. (Department: 2653)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S122000, C369S044120
Reexamination Certificate
active
06778486
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a laser module for optical information processing to record or read information recorded onto an optical recording medium such as an optical disk or magneto-optical disk by using a laser beam. More particularly, the invention relates to a laser module for handling several wavelengths from the combination of DVD and CD or the like, and an optical head and optical information recording and reproducing apparatus using it.
SUMMARY OF THE INVENTION
According to the present invention, it is possible to provide a high-precision and low-price laser module holding a plurality of laser chips, which contributes to reductions in size and cost of an optical head device.
REFERENCES:
patent: 4605942 (1986-08-01), Camlibel et al.
patent: 5497366 (1996-03-01), Fujisawa
patent: 5608695 (1997-03-01), Yamazaki
patent: 5793785 (1998-08-01), Nakanishi et al.
patent: 6016301 (2000-01-01), Takasawa et al.
patent: 6134208 (2000-10-01), Taniguchi et al.
Arikawa Kouji
Nakamura Shigeru
Shigematsu Kazuo
Tachibana Susumu
Taguchi Hideo
Hitachi , Ltd.
Le Kimlien T.
Townsend and Townsend / and Crew LLP
Tran Thang V.
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