Self-synchronizing clock source for optical memories

Details Self-synchronizing clock source for optical memories Self-synchronizing clock source for optical memories

1979-05-14

1981-09-15

Hecker, Stuart N.

Static information storage and retrieval

Addressing

Optical

3581286, 360 97, G11C 1304, G11B 714

Patent

active

042901227

ABSTRACT:
Periodic clock pulses are pre-recorded on each servo track of an optical disk to provide a local self-synchronizing source of clock frequency information for read only or direct read after write optical digital disk memories. In keeping with accepted practices, the servo track or tracks additionally function as references for controlling the radial positioning of a read head or a read/write head of such a memory.

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Elektronik, "10.sup.10 bit auf einer Platte optisch gespeichert," vol. 27, No. 15, Dec. 1978, pp. 31-34.
Kenney et al., IEEE Spectrum, "An optical disk replaces 25 mag tapes", Feb. 1979, vol. 16, No. 2, pp. 33-38.
"High Efficiency Multiple Beam Gratings," by Lee, Optical Data Symposium, Society of Photographic Scientists and Engineers, 1/23-26/79, Applied Optics.

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