Optical head apparatus applicable to optical disc apparatus

Details Optical head apparatus applicable to optical disc apparatus Optical head apparatus applicable to optical disc apparatus

1992-02-25

1993-03-30

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4423, G11B 712

Patent

active

051990130

ABSTRACT:
An optical head apparatus applicable to an optical disc apparatus having an optical disc comprises a light source emitting a light beam, and an optical system transmitting the light beam emitted from the light source onto a surface of the optical disc and transmitting a light beam reflected on the surface of the optical disc to a first optical detector and to a second optical detector. The optical system includes a beam splitter splitting the light beam reflected by the surface of the optical disc into a first light beam traveling toward the first optical detector and a second light beam traveling toward the second optical detector, and a transparent member fixed to the beam splitter, through which the second light beam passes and causing astigmatic difference in the second light beam.

REFERENCES:
patent: 4561032 (1985-12-01), Matsumoto et al.
patent: 4689780 (1987-08-01), Ohara et al.
patent: 4721368 (1988-01-01), Deguchi et al.
patent: 4764912 (1988-08-01), Ando et al.
patent: 4797868 (1989-01-01), Ando
patent: 4804835 (1989-02-01), Ando
patent: 4817072 (1989-03-01), Toide et al.
patent: 4951274 (1990-08-01), Iwanaga et al.
patent: 4973832 (1990-11-01), Marchant et al.
patent: 5015835 (1991-05-01), Ohuchida et al.
patent: 5060212 (1991-10-01), Fujita et al.

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