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An Auto-Focusing Method in Microscopic Testbed for Optical Discs

Published

Author(s)

Xiao Tang, P L'Hostis, Y Xiao

Abstract

An auto-focusing method is described and practically applied to an optical disc test-bed. In this application, an optical microscope was used to create clear pit images of optical discs. A CCD camera generated the graphic signals for the images. A standard deviation value of the gray levels for all pixels in the image is used as a feedback for auto-focusing control. The performance and possible applications of this method are discussed and test results for optical discs are given in this paper.
Citation
Journal of Research (NIST JRES) -
Volume
105 No. 4

Keywords

auto-focus, disc testbed, optical discs, standard deviation

Citation

Tang, X. , L'Hostis, P. and Xiao, Y. (2000), An Auto-Focusing Method in Microscopic Testbed for Optical Discs, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD (Accessed November 4, 2024)

Issues

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Created July 1, 2000, Updated February 17, 2017