The moiré effect was considered at a finite distance. Formulas for the wavenumber and phase of the visible moiré patterns were found with displacements of the observer and of gratings taken into account. The computer simulation and physical experiment confirm the theory. The method of measurement of the wavevectors of plane waves was proposed basing on the Radon and Fourier transformations.
The viewing zone of autostereoscopic imaging systems that use lenticular, parallax-barrier, and microlens-array plates as the viewing-zone-forming optics is analyzed in order to verify the image-quality differences between different locations of the zone. The viewing zone consists of many subzones. The images seen at most of these subzones are composed of at least one image strip selected from the total number of different view images displayed. These different view images are not mixed but patched to form a complete image. This image patching deteriorates the quality of the image seen at different subzones. We attempt to quantify the quality of the image seen at these viewing subzones by taking the inverse of the number of different view images patched together at different subzones. Although the combined viewing zone can be extended to almost all of the front space of the imaging system, in reality it is limited mainly by the image quality.
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