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Noise reduction and amplified reconstruction of a low-intensity static optical field by holography

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Abstract

A method for amplified reconstruction and noise reduction of a static low-intensity optical field by holography is suggested. The technique consists of a reduction of the reference beam intensity to that of the object field during the holographic exposure. The noise-reduced hologram obtained can then produce the amplified image with an increased reference beam. The technique is demonstrated by the detection of surface scratches on glass.

© 1991 Optical Society of America

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