Method and device for recording optical data

Details Method and device for recording optical data Method and device for recording optical data

2006-07-11

2006-07-11

Hindi, Nabil (Department: 2656)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S059110

Reexamination Certificate

active

07075871

ABSTRACT:
There is provided a method and a device for recording optical data able to improve recording power setting during recording by means of PWM with a small number of pulses. During the test recording, using a period of a recording channel clock Tw as the minimum unit, marks having different mark lengths of n1·Tw and n2·Tw (n1<n2) are recorded with the same number of m (m<n) light emitting pulses, while successively changing the maximum power Pw of the recording signals. The recorded marks are reproduced and the mark lengths T1and T2are measured from the reproduced signals. The recording power can be set by evaluating the deviations D1=T1−n1·Tw and D2=T2−n2·Tw.

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