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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 19 — Jul. 1, 1998
  • pp: 4284–4293

Very-wide-angle optical systems suitable for spaceborne photometric measurements

Andrew Buffington  »View Author Affiliations


Applied Optics, Vol. 37, Issue 19, pp. 4284-4293 (1998)
http://dx.doi.org/10.1364/AO.37.004284


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Abstract

Spaceborne visible-light images for observing the large angular extent of the solar corona require 0.1% differential broadband photometry over ∼1° sky bins. When we are using a CCD camera, this specification requires spreading unresolved images over many pixels. Large images ease correction for aberration or field curvature. Permitting large images allows simple and lightweight very-wide-angle designs employing spherical and toroidal mirrors and thick lenses that can view almost the entire sky. We present formulas and graphic results relating sky angle to focal-plane position and determining the tangential and sagittal focal surfaces governing image size at the CCD. Laboratory measurements with two prototype configurations confirm the calculations.

© 1998 Optical Society of America

OCIS Codes
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(350.1260) Other areas of optics : Astronomical optics
(350.1270) Other areas of optics : Astronomy and astrophysics
(350.6090) Other areas of optics : Space optics

History
Original Manuscript: December 1, 1997
Revised Manuscript: March 17, 1998
Published: July 1, 1998

Citation
Andrew Buffington, "Very-wide-angle optical systems suitable for spaceborne photometric measurements," Appl. Opt. 37, 4284-4293 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-19-4284


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References

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  27. See, for example, Ref. 24, Chap. 10.
  28. Spectra-Tech Inc., 2 Research Drive, P.O. Box 869, Shelton, Conn., made the toroidal mirrors.

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