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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 2 — Jan. 10, 2008
  • pp: 103–109

Comparison of the crossed and the Gregorian Mizuguchi–Dragone for wide-field millimeter-wave astronomy

Huan Tran, Adrian Lee, Shaul Hanany, Michael Milligan, and Tom Renbarger  »View Author Affiliations


Applied Optics, Vol. 47, Issue 2, pp. 103-109 (2008)
http://dx.doi.org/10.1364/AO.47.000103


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Abstract

We compare the geometric and physical-optics performance of two configurations of offset dual-reflector antennas that obey the Mizuguchi–Dragone condition. The traditional Gregorian configuration is compared with the larger crossed configuration. These configurations are candidates for experiments that measure the polarization of the cosmic microwave background. Particular attention is given to wide-field performance and polarization fidelity. Both a ray tracer and a physical optics simulation package are used to conclude that the crossed configuration has a larger diffraction-limited field of view, but within this limit both configurations have roughly the same instrumental polarization and both show excellent cross-polarization levels, with the crossed configuration showing 10   dB better performance.

© 2008 Optical Society of America

OCIS Codes
(110.3000) Imaging systems : Image quality assessment
(110.6770) Imaging systems : Telescopes
(220.1000) Optical design and fabrication : Aberration compensation
(220.1250) Optical design and fabrication : Aspherics
(220.4830) Optical design and fabrication : Systems design
(260.5430) Physical optics : Polarization

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: August 13, 2007
Manuscript Accepted: September 8, 2007
Published: January 4, 2008

Citation
Huan Tran, Adrian Lee, Shaul Hanany, Michael Milligan, and Tom Renbarger, "Comparison of the crossed and the Gregorian Mizuguchi-Dragone for wide-field millimeter-wave astronomy," Appl. Opt. 47, 103-109 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-2-103


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