We introduce a new type of diffractive element based on odd-symmetry phase gratings. Spiral arrangements of these gratings over photosensors constitute a new class of unprecedentedly-small computational camera.
© 2013 OSA
P. R. Gill and D. G. Stork, "Lensless Ultra-Miniature Imagers Using Odd-Symmetry Spiral Phase Gratings," in Imaging and Applied Optics, OSA Technical Digest (online) (Optical Society of America, 2013), paper CW4C.3.
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