Abstract
Single-shot multiwavelength digital holography using angular
multiplexing and spatial bandwidth enhancement is proposed to extend
the field of view without the superimposition of undesired images.
Angular multiplexing is used to record multiple wavelength information
with a single-shot exposure of a monochromatic image sensor. Enlargement
of the field of view without the superimposition of undesired images
is achieved by designing both the object-wave spectra and angle conditions
to obtain wide spatial bandwidths in the respective wavelengths with
a high signal-to-noise ratio. Theoretical analyses clarified that
the field of view is 1.33 times extended in square by the proposed
technique in the case of dual wavelengths. Single-shot, multiple wavelengths,
and 3D image recording with both the extended field of view and no
superimposition of the zeroth-order diffraction wave is experimentally
demonstrated while the zeroth-order wave remains, and the color-synthesized
image is degraded in the conventional technique. Experimental results
agree well to the theoretical analysis.
© 2015 IEEE
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