Coating-induced wavefront aberrations

Details Coating-induced wavefront aberrations Coating-induced wavefront aberrations

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1746..139r&link_type=abstract

In: Polarization analysis and measurement; Proceedings of the Meeting, San Diego, CA, July 19-21, 1992 (A93-33401 12-35), p. 139

Physics

Optics

Aberration, Coatings, Mirrors, Reflecting Telescopes, Wave Front Deformation, Astigmatism, Cassegrain Optics, Defocusing, Polarized Light, Ray Tracing

Scientific paper

The coatings which are used on telescope mirrors and other optical interfaces can have a profound effect on the image quality formed by an optical system. This paper evaluates the defocus and astigmatism which are caused by the s- and p-phase shifts of coatings. These coating-induced wavefront aberrations are usually insignificant, but can, under certain circumstances, overshadow the geometric wavefront aberrations of the system. The wavefront aberrations induced by reflection-enhanced coatings on an f/1.5 Cassegrain telescope are numerically evaluated as an example.

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