Abstract
In optical reconstruction of time-multiplexed
color holography, three types of chromatic aberrations exist: magnification
chromatic aberration (MCA), lateral chromatic aberration (LCA), and
axial chromatic aberration (ACA). MCA is due to wavelength change
of light source for reconstruction of different color components. In order to compensate for MCA,
a different number of pixels for each color component is suggested
and demonstrated. LCA causes mismatch of image centers for the three-color
components. The use of digital blazed gratings superposed on the computer-generated
hologram (CGH) is demonstrated as an effective way to correct for
LCA. The error due to non-integer period is analyzed, and the maximum
red wavelength is deduced in use based on the critical value of resolving
power of human eyes. For ACA, where the images of the three reconstructing
wavelengths focus at different planes, adding specific phase values
for digital achromatization is proposed. The image quality is numerically
evaluated by the mean square error. The techniques summarized in this
paper are used during generation of the CGH and thus avoids mechanical
complexity.
© 2015 IEEE
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