Summary: H ___
Recent progress on multi-domain optimization for ultra-thin cameras
and Mark A. Neifelda,b
Dept. of Electrical and Computer Engineering, University of Arizona, Tucson, AZ USA 85721
College of Optical Sciences, University of Arizona, Tucson, AZ USA 85721
Conventional imaging systems can suffer from significant aliasing and/or blur distortions when the detector array in the
focal plane under-samples the image. We propose to address this problem by engineering the optical PSF of the imaging
system followed by electronic post-processing to minimize the overall distortions. The optical PSF of the candidate
imaging system is modified by placing a phase-mask in its aperture-stop. We consider a particular parameterization of
the phase-mask and optimize its parameters to minimize the distortions. We obtain as much as 30% improvement in the
final imaging quality with the optimized optical PSF imager (SPEL) relative to the conventional imager.
Keywords: PSF engineering, aliasing, under-sampling, multiple images, imaging system, sub-pixel, phase-mask.
Designing a high-resolution optical imaging system usually leads to an impulse-like optical point spread function (PSF).
This is justified as the resolution of a conventional optical imager is seen to be limited by its optical PSF . However,
when such an optical system is followed by a semiconductor detector array, the resulting detector blur and/or aliasing