Abstract

Transmission functions are derived that are valid in the nonparaxial case for a class of lenses that will image a continuum of points along an optical axis to a single image point. This lens, which we call a logarithmic asphere, is then used in a digital camera. The resolution of the camera is limited by the pixel size of the CCD; i.e., it is not diffraction limited. Digital processing is used to recover the image, and image-plane processing is used for speed. We find a tenfold increase in the depth of field over that for the diffraction-limited case.

© 2001 Optical Society of America

Computational imaging with the logarithmic asphere: theory

Wanli Chi and Nicholas George
J. Opt. Soc. Am. A 20(12) 2260-2273 (2003)

Incoherently combining logarithmic aspheric lenses for extended depth of field

Kaiqin Chu, Nicholas George, and Wanli Chi
Appl. Opt. 48(28) 5371-5379 (2009)

Nondestructive spatial heterodyne imaging of cold atoms

S. Kadlecek, J. Sebby, R. Newell, and T. G. Walker
Opt. Lett. 26(3) 137-139 (2001)

Validity of the paraxial approximation in the focal region of a small-f-number lens

Shekhar Guha
Opt. Lett. 26(20) 1598-1600 (2001)

Generation of achromatic and propagation-invariant spot arrays by use of continuously self-imaging gratings

N. Guérineau, B. Harchaoui, J. Primot, and K. Heggarty
Opt. Lett. 26(7) 411-413 (2001)