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| Analysis of Crosstalk Between Radial Tilt Error and Tracking Error in Tracking Servo of Blue-Ray Disc |
| ZHANG Jing-Jing, WANG Yu-Xing, FENG Shi-Meng |
| (Department of Physics, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Based on diffraction theory and parameters for blueray disc, this paper investigated the energy distribution on exit pupil and tracking error signal by differential push pull (DPP) method when focus spot scanning through the bluray disc. The paper also evaluated the influence of disk radial tilt on tracking error signal and the relation between amplification degree and tilt sensitive of tracking error signal. The result shows that the allowable radial tilt angle should be smaller than 0.39° to make sure that the blue disk is read correctly, and the amplification degree in DPP method only affects the amplitude of tracking error signal without influence on its tilt sensitivity.
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Received: 05 November 2010
Published: 31 December 2011
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