An interferometer based on the Talbot effect |
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Authors: | A.W. LohmannD.E. Silva |
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Affiliation: | Department of Applied Physics and Information Science, University of California, San Diego, La Jolla, California 92037, USA |
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Abstract: | The moiré effect is very sensitive in detecting small differences between two similar gratings. These differences might be caused by an object with phase gradient placed between the two gratings. The performance of such an instrument can be understood in terms of the “Talbot effect” (also called “Fourier imaging” or “self-imaging”). Slight modifications provide shearing interferences and the second derivative of the object. |
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