Optical recording system with optimal recording laser beam power control, and method and device for generating a mark formation effectiveness signal in an optical recording system
US7242652B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 31, 2002 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Apr 10, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/00458
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording system includes a laser light source that provides an incident recording light signal for recording information on an optical recording medium, an optical detector for detecting a reflected write pulse from the optical recording medium, and a light source controller for controlling recording laser beam power of the laser light source according to a mark formation effectiveness signal generated by a signal generating device. The signal generating device includes an analog peak value detector for detecting a peak value of the reflected write pulse from the optical detector, at least one sample-hold circuit for sampling the reflected write pulse to obtain at least one amplitude value, and a processor for generating the mark formation effectiveness signal according to the peak value and the amplitude value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.