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Evaluation of the focal distance of a lens by Talbot interferometry

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Abstract

A simple and precise technique, based on Talbot interferometry, of measuring the focal distance of a simple lens or a compound lens system is described. To establish the foundations of the technique, properties of self-images in free space and of their images, when formed by a lens, are first examined and experimentally demonstrated.

© 1988 Optical Society of America

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