| 摘要 |
A device for recording information on a record carrier (11) has a radiation source and a sensor (33) for generating a sense signal (32), a power control unit (29) for setting the radiation power based on a sampled sense signal, and a sense unit (31) for generating the sampled sense signal. The sense signal is sampled at Ts in periods that are selected on having at least a selected minimum length Lsel in a end part of the selected periods. The sense signal is sampled in the selected control periods for determining a second sample value on a detection time Tdet different from Ts. A difference is determined between the first and the second sample value, and, in dependence on the difference, generating the sampled sense signal is adapted. In particular Lsel may be adapted in dependence on the difference for eliminating remaining effects of a preceding period at a higher power.
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