Electromagnetic driving apparatus including objective lens holde

Details Electromagnetic driving apparatus including objective lens holde Electromagnetic driving apparatus including objective lens holde

1993-07-28

1995-10-03

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 369 54, G11B 7095

Patent

active

054558115

ABSTRACT:
An electromagnetic objective lens driving apparatus of an optical disc data recording and reproducing apparatus is provided. The apparatus includes a carriage that is movable in a radial direction of the optical disc, and an objective lens holder that is supported on the carriage to move in focusing and tracking directions of the optical disc. A pair of reflecting surfaces are provided on opposite end surfaces of the objective lens holder in the tracking direction, and are directly formed on the outer surfaces of the objective lens holder by plating. A pair of photo sensors is provided on the carriage to be opposed to the respective surfaces.

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patent: 5241528 (1993-08-01), Mohri et al.
patent: 5321678 (1994-06-01), Takishima et al.

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