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Autofocusing based on power-spectra analysis

Suganda Jutamulia, Toshimitsu Asakura, R. D. Bahuguna, and Panfilo C. De Guzman

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Abstract

An autofocusing mechanism based on the concept of autocorrelation is described. The method may be performed optically with ring detectors in the Fourier domain or electronically with a special computing chip or software.

© 1994 Optical Society of America

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