23 March 1987 Intensity Distribution In Out-Of-Focus Images Of A Rotationally Symmetric Optical System
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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.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Steve N Wong, Steve N Wong, Robert E Parks, Robert E Parks, Lianzhen Shao, Lianzhen Shao, } "Intensity Distribution In Out-Of-Focus Images Of A Rotationally Symmetric Optical System", Proc. SPIE 0680, Surface Characterization and Testing, (23 March 1987); doi: 10.1117/12.939594; https://doi.org/10.1117/12.939594
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