Optical information recording and reproducing apparatus with swi

Details Optical information recording and reproducing apparatus with swi Optical information recording and reproducing apparatus with swi

Filed on

1993-01-14

Date issued

1993-11-30

Examiner

Weinhardt, Robert A.

Patent Class

Dynamic information storage or retrieval

SubClass

With servo positioning of transducer assembly over track...

SubSubClass

Optical servo system

Other Related Categories

235454, 369 4429, 369 4427, 369 4437, G11B 708

Type

Patent

Status

active

Patent number

052672263

Description

ABSTRACT:
According to the optical information recording and reproducing apparatus of the present invention, in an optical information recording and reproducing apparatus for recording and/or reproducing information while performing a relative reciprocating movement between a recording and/or reproducing head and an optical information recording medium having information tracks, plural spots including a spot having the function of recording and/or reproducing information formed on said recording medium by said head are arranged so as to be located on the same information track in said recording medium. Further, by switching the functions which at least two spots have during forward movement and during backward movement of said relative movement, it is possible to arrange the spots having roles in accordance with the recording and reproducing apparatus and have them function in a predetermined order. Thus, the present invention has an effect that a stable and correct recording and/or reproduction of information with high speed becomes possible.

REFERENCES:
patent: 4494226 (1985-01-01), Hazel et al.
patent: 4571716 (1986-02-01), Szerlip
patent: 4598393 (1986-07-01), Pierce et al.
patent: 4730293 (1988-03-01), Pierce et al.
patent: 4787075 (1988-11-01), Matsuoka et al.
patent: 4825059 (1989-04-01), Kurihara et al.
patent: 4881214 (1989-11-01), Izawa et al.
patent: 5027337 (1991-06-01), Takahashi et al.

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