Modelling the characteristics of a photodetector in a DVD player
Modelling the characteristics of a photodetector in a DVD player
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DOI：
10.1016/j.sna.2005.02.008
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发表时间：
2005-05-17
影响因子：
4.6
通讯作者：
Schröder, HJ
中科院分区：
文献类型：
--
作者：
Hnilicka, B;Voda, A;Schröder, HJ
本文提出了一种新的方法来模拟DVD播放机中光电探测器的非线性特性（所谓的s曲线）。光电探测器在DVD播放机中用于产生对焦和跟踪误差信号，这反过来又必须控制在最低水平。针对聚焦误差信号的产生，本文建立了基于像散法和光学几何分析的解析型和数值型光电探测器模型。讨论了模型参数对聚焦误差信号的影响。为了估计未知的模型参数，采用曲线拟合方法，使用意法半导体实验室开发的工业dvd视频播放器的测量数据。通过与实际聚焦误差信号的比较，说明了模型的质量。(c) 2005 Elsevier B.V.版权所有
This paper presents a new method for modelling the non-linear characteristics of a photodetector (so-called the S-curve) in a DVD player. The photodetector is used in the DVD player to generate the focus and tracking error signals, which in turn have to be controlled at the minimum levels. For focus error signal generation, an analytical and a numerical photodetector model are developed here, based on the astigmatic method and on opto-geometrical analysis. The influence of model parameters on the focus error signal is discussed. To estimate the unknown model parameters, a curve fitting method is applied, using measured data from an industrial DVD-video player developed in STMicroelectronics laboratories. Model quality is illustrated by a comparison with the real focus error signal. (c) 2005 Elsevier B.V. All rights reserved.