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Proceedings Paper

Intensity Distribution In Out-Of-Focus Images Of A Rotationally Symmetric Optical System
Author(s): Steve N Wong; Robert E Parks; Lianzhen Shao
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Paper Abstract

A theory describing the intensity distribution in out-of-focus images of a telescope mirror is derived based on geometrical ray optics for a rotationally symmetric optical system. Surfaces at which the intensity distribution diverges are shown to be the same as the classic caustic surfaces. The contrast variations at out-of-focus positions are proportional to the square of the F-number of the system. For a large F-number system such as a telescope, the out-of-focus intensity distributions provide a sensitive method for determining zonal error distributions of the optical system.

Paper Details

Date Published: 23 March 1987
PDF: 9 pages
Proc. SPIE 0680, Surface Characterization and Testing, (23 March 1987); doi: 10.1117/12.939594
Show Author Affiliations
Steve N Wong, Tinsley Laboratories, Inc. (United States)
Robert E Parks, University of Arizona (United States)
Lianzhen Shao, Nanjing Astronomical Instrument Factory (China)

Published in SPIE Proceedings Vol. 0680:
Surface Characterization and Testing
Katherine Creath, Editor(s)

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