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Appl Opt. 1993 Jul 10;32(20):3715-8. doi: 10.1364/AO.32.003715.

Diffractive optical implementation of rotation transform performed by using phase singularities.

Abstract

Some geometrical transforms cannot be implemented as computer-generated holograms (CGH's) with Bryngdahl's technique. The phase functions of these geometrical transforms have phase singularities that cause branch points in the transmission functions of CGH's. An example of such a geometrical transform is the rotation transform. This transform is implemented by including a superposition of phase singularities in the phase function of the CGH. I present results of this implementation.

PMID:
20830000
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