Asymptotic approximation to the encircled energy function for arbitrary aperture shapes
Applied Optics, Vol. 23, Issue 2, pp. 353-357 (1984)
http://dx.doi.org/10.1364/AO.23.000353
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Abstract
Encircled energy can be easily estimated for imaging systems with oddly shaped apertures using a simple asymptotic approximation formula. A useful tool for the optical system designer, it linearly relates the encircled energy to the perimeter-to-area ratio of the aperture. Comparisons made with numerical calculations show that it is usefully accurate for circles in the focal plane as small in radius as λƒ#.
© 1984 Optical Society of America
Citation
Peter P. Clark, James W. Howard, and Edward R. Freniere, "Asymptotic approximation to the encircled energy function for arbitrary aperture shapes," Appl. Opt. 23, 353-357 (1984)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-23-2-353
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