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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 30 — Oct. 20, 2007
  • pp: 7485–7493

Requirements on optical density and phase dispersion of imperfect band-limited occulting masks in a broadband coronagraph

Erkin Sidick  »View Author Affiliations


Applied Optics, Vol. 46, Issue 30, pp. 7485-7493 (2007)
http://dx.doi.org/10.1364/AO.46.007485


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Abstract

We investigate the effects of the parasitic phase of imperfect band-limited occulting masks on the broadband contrast performance of a high-contrast imaging system through modeling and simulations. We also examine the effects of the phase and the optical-density dispersions of occulting masks whose parasitic phase has been compensated at the center wavelength but is nonzero at other wavelengths. Two types of occulting masks are considered: gray-scale masks such as those made on a high-energy beam-sensitive glass, and recently proposed spatially profiled metal masks, both having 1D Sinc 2 ( linear - Sinc 2 ) amplitude transmission coefficient ( Sinc 4 intensity transmittance) profiles. We determine the conditions for obtaining 1 × 10 9 and 1 × 10 10 contrast values with a light centered at a 785   nm wavelength and having a 10% bandwidth in a coronagraphic telescope having ideal optical surfaces but imperfect band-limited image-plane occulting masks.

© 2007 Optical Society of America

OCIS Codes
(110.6770) Imaging systems : Telescopes
(220.4830) Optical design and fabrication : Systems design

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: May 22, 2007
Revised Manuscript: August 22, 2007
Manuscript Accepted: August 24, 2007
Published: October 12, 2007

Citation
Erkin Sidick, "Requirements on optical density and phase dispersion of imperfect band-limited occulting masks in a broadband coronagraph," Appl. Opt. 46, 7485-7493 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-30-7485

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