1 July 2001 Autofocusing control for a DIVX burst-cutting-area recording system
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Optical Engineering, 40(7), (2001). doi:10.1117/1.1383993
Abstract
An autofocusing system used for a laser burst-cutting-area (BCA) marking system for a DlVX production line has been developed. The principle of focus error detection is based on a method that takes advantage of the focusing properties of simple optical elements. A differential detection method is used to achieve high resolution, and a position servo is designed to accomplish the autofocusing. Some design considerations, system modeling, simulation, and experiments are described. Experimental results are presented to show the feasibility of this system.
Chengping Zhang, Peisen S. Huang, Dmitry Donskoy, Yusong Yin, "Autofocusing control for a DIVX burst-cutting-area recording system," Optical Engineering 40(7), (1 July 2001). http://dx.doi.org/10.1117/1.1383993
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KEYWORDS
Control systems

Objectives

Digital video discs

Laser marking

Photodiodes

Reflection

Beam splitters

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