Information recording/reproducing apparatus with disk having sec

Details Information recording/reproducing apparatus with disk having sec Information recording/reproducing apparatus with disk having sec

1982-09-23

1985-07-16

Cardillo, Jr., Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 721, 360 722, G11B 1924, G11B 2108, G11B 1926

Patent

active

045300186

ABSTRACT:
In a data recording/reproducing apparatus, a DC motor is provided for rotating an optical disk. A recording/reproducing head is driven to move over the disk linearly in the radial direction of the disk, thereby defining a plurality of data-storing tracks on the disk. A motor control section is provided for controlling the rotation of the disk so as to change the angular velocity of the disk when the head tracing is changed among the track groups. While the head is tracing the tracks included in the same track group, the rotation of the disk is made constant so that the disk rotates at a constant angular speed.

REFERENCES:
patent: 4390912 (1983-06-01), Hertrich et al.
"RCA Develops Laser-Storage Method That Could Reach 10.sup.11 Bits per Disk": Laser Focus, Mar. '79, pp. 28-30.
IBM Technical Disclosure Bulletin, vol. 23, No. 11, Apr. 1981, pp. 5068-5069, N.Y., R. F. Herald et al., "Zone Recording Flexible Diskette Drive Via Microprocessor Control".
Patent Abstracts of Japan, vol. 2, No. 104, Aug. 26, 1978, p. 5392 E 78.
Patent Abstracts of Japan, vol. 5, No. 73 (P-61)[745], May 15, 1981.

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