Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1992-06-17
1993-08-03
Davie, James W.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
372 36, G11B 700, H01S 304
Patent
active
052335801
ABSTRACT:
An optical pick-up is arranged to detect information recorded on an optical disk by causing laser light projected onto and reflected from a signal surface of the optical disk disposed within an optical system and the laser light is received by a light receiving element provided in the optical system. The optical pick-up is mounted with a laser diode unit which includes a metallic substrate, a laser diode, a photo-diode, a current feeding lead portion to the laser diode and a current output lead portion which forms the photo-diode, respectively disposed at one side face in the direction of thickness of the metallic substrate for emitting the laser light. The laser diode unit is positioned and fixed at a predetermined position of the optical system through a mounting member. The mounting of the laser diode unit includes setting the other side face in the direction of thickness of the substrate and the mounting member in a desired positional relation for contact with each other as a result, a plurality of contact places therebetween may be simultaneously welded by laser light for combining the laser diode unit and the optical pick-up into one unit.
REFERENCES:
patent: 4210878 (1980-07-01), Yonezu
patent: 4626653 (1986-12-01), Sciaky et al.
patent: 4768070 (1988-08-01), Takizawa et al.
patent: 4792658 (1988-12-01), Longhaus et al.
patent: 4837768 (1989-06-01), Schmid
patent: 4847846 (1989-07-01), Sone et al.
patent: 4893296 (1990-01-01), Matsumoto et al.
patent: 4906065 (1990-03-01), Taumberger
Nakata Naotaro
Tanaka Haruo
Davie James W.
Rohm & Co., Ltd.
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