Physics – Optics
Scientific paper
Jan 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apopt..47..103t&link_type=abstract
Applied Optics IP, vol. 47, Issue 2, pp.103-109
Physics
Optics
2
Image Quality Assessment, Telescopes, Aberration Compensation, Aspherics, Systems Design, Polarization
Scientific paper
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.
Hanany Shaul
Lee Adrian
Milligan Michael
Renbarger Tom
Tran Huan
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