Abstract

Fresnel zone plates are used as pupil apertures to extend the depth of field of an incoherent imaging system. The defocused optical transfer function is evaluated approximately, and the results are confirmed by experiments and by subjective evaluations of the images of a test chart. With a pupil having four zones, for example, the resolution limit at four depths of field out of focus is improved by a factor of 10.

© 1984 Optical Society of America

Pupil coding masks for imaging polychromatic scenes with high resolution and extended depth of field

Benjamin Milgrom, Naim Konforti, Michael A. Golub, and Emanuel Marom
Opt. Express 18(15) 15569-15584 (2010)

Imaging properties of defocused partitioned pupils

Chanin Varamit and Guy Indebetouw
J. Opt. Soc. Am. A 2(6) 799-802 (1985)

Optical/digital incoherent image processing for extended depth of field

Ting-Chung Poon and Masoud Motamedi
Appl. Opt. 26(21) 4612-4615 (1987)

Radial mask for imaging systems that exhibit high resolution and extended depths of field

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Phase plate to extend the depth of field of incoherent hybrid imaging systems

Sherif S. Sherif, W. Thomas Cathey, and Ed R. Dowski
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