Optical medium recording method and apparatus employing pulse wi

Details Optical medium recording method and apparatus employing pulse wi Optical medium recording method and apparatus employing pulse wi

1993-01-19

1994-09-13

Hajec, Donald

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 60, H04N 576

Patent

active

053475054

ABSTRACT:
A method and apparatus for optical recording addresses a problem of edge shift which occurs during the recording. The apparatus includes a rotating mechanism for rotating an optical medium, and an optical head having a light source for recording information on the optical medium. A moving mechanism moves the optical head to a predetermined position on the optical medium, and a recording controlling device controls light source of the optical head in accordance with a recording pulse. The recording controlling device includes a pulse width measuring device for measuring the pulse width of a recording pulse, and fall controlling device effects a recording compensation by advancing a fall of the recording pulse with a lead, such that the lead increases with the measured pulse width. A pulse interval measuring device is provided for measuring a pulse interval preceding the recording pulse, and a rise controlling device effects a recording compensation by delaying a rise of the recording pulse with a delay, such that the delay decreases with the measured pulse interval.

REFERENCES:
patent: 5043971 (1991-08-01), Van et al.
patent: 5128921 (1992-07-01), Van et al.
Patent Abstracts of Japan, unexamined application, P field, vol. 12, No. 271, Jul. 28, 1988.
Patent Abstracts of Japan, unexamined application, P field, vol. 13, No. 102, Mar. 10, 1989.

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