Sky input horn for a far-infrared interferometer

Details Sky input horn for a far-infrared interferometer Sky input horn for a far-infrared interferometer

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982optl....7..210m&link_type=abstract

Optics Letters, vol. 7, May 1982, p. 210, 211.

Astronomy and Astrophysics

Astronomy

2

Concentrators, Conical Bodies, Cosmic Background Explorer Satellite, Horns, Infrared Interferometers, Far Infrared Radiation, Infrared Astronomy, Parabolic Bodies, Ray Tracing, Spaceborne Telescopes

Scientific paper

A unique design has been developed whereby a compound parabolic concentrator (CPC) and a compound elliptical concentrator (CEC) are joined at their throats. The CPC serves as the field-defining optics, in that it accepts up to a certain maximum acceptance angle and then concentrates this accepted energy at its throat. Energy incident from angles greater than the acceptance angle is rejected. The CEC takes the energy concentrated at the CPC throat and then redirects this energy into a finite-sized pupil a given distance away. The considered design will be used as the sky input horn for a cryogenic far-infrared polarizing interferometer to be flown on NASA's Cosmic Background Explorer satellite. The interferometer will operate at 2 K and measure the 3-K cosmic background radiation of the universe in the 100-micrometer-1-cm spectral range.

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