Some filter techniques in the far infrared

Details Some filter techniques in the far infrared Some filter techniques in the far infrared

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ssrv...17..657w&link_type=abstract

(Workshop on Coherent Detection in Astronomy, Rhenen, Netherlands, Apr. 25, 26, 1974.) Space Science Reviews, vol. 17, July 1975

Astronomy and Astrophysics

Astronomy

1

Fabry-Perot Spectrometers, Far Infrared Radiation, Infrared Astronomy, Infrared Filters, Astronomical Photometry, Balloon-Borne Instruments, Bandpass Filters, Hcn Lasers

Scientific paper

In infrared astronomical investigations conducted with the aid of balloons outside the atmosphere, the radiation is detected with helium cooled bolometers and the spectral band is selected by making use of the reststrahlen reflection of halogenide crystals in the same cryostat. The high reflectivity in the reststrahlen band makes it possible to employ multiple reflection filters. Techniques for narrow band filtering are discussed, giving attention to the preparation of Fabry-Perot type filters of metallic mesh.

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