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Proceedings Paper

Developed player for multilayer disk
Author(s): Guoliang Huang; Duanyi Xu; Longfa Pan; Dajin Lu; Guosheng Qi
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Paper Abstract

Based on nm fabrication technology, a developed player for dual and multilayer disk is proposed in this paper. A multifocus device with focus 8.5 mm is used. The distance between two neighbor focal plane is 0.45 mm. The numeral aperture of the developed player is 0.59, the focusing spot is 0.93 um. The developed player with the multifocus device is not only simple in structure, light in weight, but also can focus automatically at any layer of multilayer disk eve, no mechanical movement. Compared to the common CD player, the developed player is characteristic of only one multifocus device to focus and split beam, where the prism and the grating in common CD player are displaced, but the focusing and the tracing error signals can be obtained conveniently for servo detection.

Paper Details

Date Published: 20 September 1996
PDF: 7 pages
Proc. SPIE 2890, Optical Recording, Storage, and Retrieval Systems, (20 September 1996); doi: 10.1117/12.251983
Show Author Affiliations
Guoliang Huang, Tsinghua Univ. (China)
Duanyi Xu, Tsinghua Univ. (China)
Longfa Pan, Tsinghua Univ. (China)
Dajin Lu, Tsinghua Univ. (China)
Guosheng Qi, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 2890:
Optical Recording, Storage, and Retrieval Systems
Baogen Feng; Yoshito Tsunoda, Editor(s)

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