Disk drive with optical encoder having integral scale member

Details Disk drive with optical encoder having integral scale member Disk drive with optical encoder having integral scale member

1991-07-05

1993-01-12

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 7811, 360106, G11B 5012, G11B 5596, G11B 555

Patent

active

051794829

ABSTRACT:
A disk recording and/or reproducing apparatus performs recording information on and/or reproducing information from a disk-like recording medium within a sealed receptacle by the use of a head. In the apparatus, an optical encoder for detecting positions of the head with respect to the disk-like recording medium has such a scale plate as to be swingable on the arm shaft of a head arm together with the head arm, as to have scale marks engraved in the radius direction of the arm shaft, and as to consist of a single member in whole, so that a trouble such as the head is off the track due to a thermal influence and so forth, never occurs.

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