1 July 1990 Two beam optical head for erasable phase change media
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Proceedings Volume 1230, International Conference on Optoelectronic Science and Engineering '90; 12306N (1990) https://doi.org/10.1117/12.2294876
Event: The Marketplace for Industrial Lasers 1990, 1990, Chicago, IL, United States
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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ma-li Gong, "Two beam optical head for erasable phase change media", Proc. SPIE 1230, International Conference on Optoelectronic Science and Engineering '90, 12306N (1 July 1990); doi: 10.1117/12.2294876; https://doi.org/10.1117/12.2294876
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