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Proceedings Paper

Two beam optical head for erasable phase change media
Author(s): Ma-li Gong
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Paper Abstract

A new type of the erasable optical head with two beams, that one is circle spot, the other ellipse, have been developed. The boundary combination method( BCM) combines / isolates the beams of two different wavelength. A simple autofocuse method named as offset axis has been described. The focusing error is less than 0. 5/1 m, the tracking error, less than 0. 1p m. The size of the head is 35 x 35 x 40 mm, weight less than 60g.

Paper Details

Date Published: 1 July 1990
PDF: 3 pages
Proc. SPIE 1230, International Conference on Optoelectronic Science and Engineering '90, 12306N (1 July 1990); doi: 10.1117/12.2294876
Show Author Affiliations
Ma-li Gong, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 1230:
International Conference on Optoelectronic Science and Engineering '90
DaHeng Wang, Editor(s)

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