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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 25, Iss. 1 — Jan. 1, 2008
  • pp: 182–189

Analysis of diffraction from the occulter edges of a giant externally occulted solar coronagraph

Enrico Verroi, Fabio Frassetto, and Giampiero Naletto  »View Author Affiliations


JOSA A, Vol. 25, Issue 1, pp. 182-189 (2008)
http://dx.doi.org/10.1364/JOSAA.25.000182


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Abstract

A technique is described for the calculation of the intensity of the light diffracted by the occulter of an externally occulted solar coronagraph. This technique can be applied to an occulter of generic shape, but the attention is here focused on a specific application; that is, the case of a giant space solar coronagraph, in which the occulter is located at 100 m from the telescope aperture. By means of the code developed, it has been possible to simulate the effects of various shapes of the occulter edge with the aim of analyzing in detail the best apodization for the coronagraph. The results obtained show that an occulter with a circular serrated edge allows a remarkable reduction of the amount of diffracted light on the coronagraph’s entrance aperture with respect to a simpler circular disk case.

© 2008 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(050.1960) Diffraction and gratings : Diffraction theory
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(220.1230) Optical design and fabrication : Apodization
(350.6090) Other areas of optics : Space optics

ToC Category:
Diffraction and Gratings

History
Original Manuscript: September 4, 2007
Revised Manuscript: October 15, 2007
Manuscript Accepted: October 23, 2007
Published: December 19, 2007

Citation
Enrico Verroi, Fabio Frassetto, and Giampiero Naletto, "Analysis of diffraction from the occulter edges of a giant externally occulted solar coronagraph," J. Opt. Soc. Am. A 25, 182-189 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-1-182


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