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Talbot interferometry in noncollimated illumination for curvature and focal length measurements

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Abstract

We describe a simple method for measuring the radius of curvature by using Talbot interferometry in a noncollimated light beam. This scheme can also be used to determine the focal length of the collimating lens employed in the setup. Results of the measurements are presented. A discussion of achievable accuracies and the proper choice of parameters is included.

© 1992 Optical Society of America

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