| 摘要 |
<p>When writing a record carrier of an optically readable type, such as the rewritable CD-RW, the quality of the written information patterns is affected by contaminations of the surface due to dust and fingerprints. The inventors have found that the control of th writing power P should be inversely proportional to the measured reflection R, but less than an amount proportional thereto. A good control is achieved when P *∑R is maintained constant, and a control which is suitable for dealing with different contaminations can be achieved by maintaining P *Rx constant, in which x has a value of between 0.5 and 0.8. The way in which the reflection R can be measured from the signal coming from side spots formed next to the track to be scanned is also described.</p> |
