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Bifocal-polarization holographic lens

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Abstract

We present a holographic lens with novel features recorded in an azopolymer film. Two holographic modulations, bulk birefringence and surface relief, are induced in the medium at the same time. The resultant holographic element has two focal planes, and the polarization of light in the focal points depends on the polarization of the incident light. Applications of this device for writing–reading information in two planes simultaneously or separately are described.

© 2004 Optical Society of America

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