Method and arrangement for regulating the light power of a scanning beam in an apparatus for reading from or for writing to optical recording media

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	Method and arrangement for regulating the light power of a scanning beam in an apparatus for reading from or for writing to optical recording media
其他题名	Method and arrangement for regulating the light power of a scanning beam in an apparatus for reading from or for writing to optical recording media
	BRAUER, DIETMAR; LEHR, STEFFEN; NEISS, VOLKER
	2002-07-08
专利权人	THOMSON LICENSING S.A.
公开日期	2002-07-08
授权国家	澳大利亚
专利类型	发明申请
摘要	In order to compensate for so-called clipping effects, it is proposed, in an apparatus for reading from and/or writing to an optical recording medium in which the light power of a laser diode (1) is to be set to a plurality of light power levels, to perform a calibration to a specific light power level (LP2) before the actual regulation of the light power. On account of the calibration, the instantaneous gradient of the characteristic curve which describes the dependence of the laser light power on the laser diode current can be inferred in order, on the basis of this information, to take account of a change - caused, for example, by ageing or clipping effects - in the characteristic curve gradient in the course of the subsequent regulation of the light power of the scanning beam generated by the laser diode (1).
其他摘要	为了补偿所谓的削波效应，提出了一种用于读取和/或写入光学记录介质的装置，其中激光二极管（1）的光功率将被设置为多个光功率水平，用于在实际调节光功率之前对特定光功率水平（LP2）执行校准。由于校准，可以基于该信息依次推断描述激光功率对激光二极管电流的依赖性的特性曲线的瞬时梯度，以考虑由此引起的变化。例如，通过老化或削波效应 - 在随后调节由激光二极管（1）产生的扫描光束的光功率的过程中的特征曲线梯度中。
主权项	Method for regulating the light power of a scanning beam in an apparatus for reading from and/or writing to an optical recording medium, a scanning beam directed onto the optical recording medium being generated by a light source (1) for the purpose of reading from and/or writing to an optical recording medium, and the light power of the scanning beam being regulated, characterized in that a calibration to a predetermined light power level (LP2) of the light source (1) is carried out, and predetermined light power levels of the scanning beam are subsequently set in a manner dependent on the result of the calibration.
申请日期	2001-12-10
专利号	AU2002229637A1
专利状态	失效
申请号	AU2002229637
公开（公告）号	AU2002229637A1
IPC 分类号	G11B7/0045 \| G11B7/125 \| G11B7/1263 \| H01S5/062 \| G11B7/005
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/60766
专题	半导体激光器专利数据库
作者单位	THOMSON LICENSING S.A.
推荐引用方式 GB/T 7714	BRAUER, DIETMAR,LEHR, STEFFEN,NEISS, VOLKER. Method and arrangement for regulating the light power of a scanning beam in an apparatus for reading from or for writing to optical recording media. AU2002229637A1[P]. 2002-07-08.