Apparatus for aligning optical axis of optical pick-up

Details Apparatus for aligning optical axis of optical pick-up Apparatus for aligning optical axis of optical pick-up

1996-04-08

1998-02-10

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4414, 369 4422, 369 4432, G11B 7095

Patent

active

057176663

ABSTRACT:
An optical axis alignment apparatus of an optical pick-up device for measuring and adjusting a shift amount between a central axis of an objective lens and an optical axis of a laser beam emitted from a light source includes a first photodetector positioned to reciprocate along a central axis of the objective lens, for detecting a shift amount of an optical axis of the laser beam with respect to the central axis of the objective lens and for generating a first detection signal; a second photodetector for detecting a distribution of the laser beam emitted from the laser source and for generating a second detection signal; a beam splitter for splitting the laser beam at a predetermined angle to direct the laser beam to said first and said second photodetectors, respectively; a driving mechanism for reciprocating the first photodetector along the central axis of the objective lens; and mechanism for adjusting the position and the angle of the laser source in dependence upon reception of the first and second detection signals.

REFERENCES:
patent: 4837757 (1989-06-01), Okada et al.
patent: 4959824 (1990-09-01), Ueda et al.
patent: 4977552 (1990-12-01), Gotoh
patent: 5060213 (1991-10-01), Kamisada
patent: 5072436 (1991-12-01), Honda
patent: 5073884 (1991-12-01), Kobayashi
patent: 5095473 (1992-03-01), Gotoh
patent: 5140572 (1992-08-01), Kibune et al.
patent: 5161040 (1992-11-01), Yokoyama et al.
patent: 5175718 (1992-12-01), Honda
patent: 5218586 (1993-06-01), Tadokoro

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