Abstract
We present theoretical analyses and computer simulations for incoherent imaging through a thin slab waveguide of length l and slit opening 2a. Such an optical channel has a spatially varying point spread function, which introduces severe distortion. We show that phase diver- sity imaging, where the diversity is introduced by a simple spatial shift of the object, can significantly reduce the distortion. The spatial shift diver- sity is new to the literature. The results are shown with and without noise at 8-bit pixel quantization and are compared with the diffraction-limited image caused by imaging through the slit aperture alone. © 2000 Society of Photo-Optical Instrumentation Engineers. (S0091-3286(00)01209-5)
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