The dark-line defect problem in the conventional polygon computer-generated hologram (CGH) is addressed. To resolve this problem, we clarify the physical origin of the defect and address the concept of phase-regularization. A novel synthesis algorithm for a phase-regularized polygon CGH for generating photorealistic defect-free holographic images is proposed. The optical reconstruction results of the phase-regularized polygon CGHs without the dark-line defects are presented.

We propose a full-color complex holographic display system design comprised of three R/G/B amplitude-only spatial light modulators and an achromatic Fourier filter. A key feature of the design is a single achromatic Fourier bandpass filter for robust axial R/G/B color matching, whereby the R/G/B holographic image light fields can be three-dimensionally aligned. The synthesis algorithm producing the full-color computer-generated holograms for this system is described and a full-color optical reconstruction of the designed holographic three-dimensional images is experimentally demonstrated.

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Nuclear magnetic resonance spectra of 51V (I=7/2) in ferroelastic BiVO4 single crystals grown by the Czochralski method have been investigated by employing a wide-line Varian spectrometer. The seven line structure due to the quadrupole interaction was measured at a fixed frequency of 15 MHz in three mutually perpendicular crystal planes at room temperature and 77 K, well below its ferroelastic Curie temperature of 523 K. From the experimental data the quadrupole coupling constant, e 2 q Q/h, and asymmetry parameter, η, are determined: e 2 q Q/h=4.856 MHz and η=0.380 at room temperature, and 5.062 MHz and 0.459, respectively, at 77 K. The principal axes of the electric field gradient tensor are X=c, Y=a, and Z=b, where a,b, and c are crystal axes with β=90.38°. The twin structure of some of the crystals is also observed.