The detour phase method for the design of computer-generated
holograms can be modified to achieve multichannel reconstruction along
various diffraction orders. It is shown how a single hologram can
be used to display two patterns of different intensities along two
diffraction orders. This is achieved by the release of any requirement
on the phase distributions of these patterns, thus leaving them as free
parameters. Various algorithms are suggested to make possible
nonidentical reconstructions along two different off-axis diffraction
orders. The two reconstruction orders can be chosen
arbitrarily. The case of four-channel reconstructions for
generating four different images is discussed as well. Computer
simulations and optical experiments were carried out to demonstrate the
capabilities of the proposed approaches.
© 1998 Optical Society of America
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