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Proceedings Paper

3D profiles of scratches on optical disks and their effect on a bit engine
Author(s): Jianyi Zhong; J. M. den Hollander; Henk Goossens; Zhongjin Guo; Jiagang Zhang
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Paper Abstract

Scratches are common defects on the surface of optical disks and affect the status of the servo system and the readout of data, sometimes they even cause the breakdown of the system. To understand the mechanism, it is necessary to investigate profiles of scratches and their influence on the servo system and the HF signal. In this paper, the 3D profiles of more than 15 scratches have been measured, and the scratches are defined as U-type, W-type and M-type respectively. The experiments show that the rough surfaces of scratches scatter away the incident light heavily, and finally reduce the light intensity and change the intensity distribution on the exit pupil plane. The influences of the U-type scratch, W-type scratch and the M-type scratch on a servo system and HF signal are discussed.

Paper Details

Date Published: 17 September 2002
PDF: 6 pages
Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002); doi: 10.1117/12.483313
Show Author Affiliations
Jianyi Zhong, Philips Research East Asia (China)
J. M. den Hollander, Philips Research Labs. (Netherlands)
Henk Goossens, Philips Research Labs. (Netherlands)
Zhongjin Guo, Philips Research East Asia (China)
Jiagang Zhang, Philips Research East Asia (China)


Published in SPIE Proceedings Vol. 4930:
Advanced Optical Storage Technology
Duanyi Xu; Seiya Ogawa, Editor(s)

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