Method of adjusting optics of optical pickup using error negatin

Details Method of adjusting optics of optical pickup using error negatin Method of adjusting optics of optical pickup using error negatin

1995-06-20

1997-02-25

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4442, G11B 709

Patent

active

056065370

ABSTRACT:
Method of adjusting optics of an optical pickup using a light-emitting-and-receiving device comprising a semiconductor substrate on which a light-emitting portion and a light-receiving portion are integrally formed. The light-receiving portion consists of a first array and a second array of light-emitting elements. These two arrays are in line in the tracking direction of an optical disk. The light-emitting elements of each array are arrayed in the radial direction of the disk. The output signals from the light-emitting elements of these two arrays are summed up to produce a control signal. The position of the light-emitting-and-receiving device is adjusted in response to the control signal.

REFERENCES:
patent: 4823331 (1989-04-01), Yoshitoshi et al.
patent: 5283771 (1994-02-01), Kadwaki et al.
patent: 5406543 (1995-04-01), Kobayashi et al.
patent: 5481386 (1996-01-01), Shimano et al.

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