An infrared upconverter for astronomical imaging

Details An infrared upconverter for astronomical imaging An infrared upconverter for astronomical imaging

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apphl..31..440b&link_type=abstract

Applied Physics Letters, vol. 31, Oct. 1, 1977, p. 440-442.

Physics

Optics

6

Astronomical Photography, Crystal Optics, Energy Conversion Efficiency, Infrared Imagery, Parametric Frequency Converters, Signal Mixing, Impedance Matching, Phase Shift, Spectral Resolution, Telescopes, Thermal Radiation, Tuning, Wave Diffraction

Scientific paper

An imaging upconverter has been constructed which is suitable for use in the study of the thermal 10-micron radiation from astronomical sources. The infrared radiation is converted to visible radiation by mixing in a 1-cm-long proustite crystal. The phase-matched 2-kayser bandpass is tunable from 9 to 11 microns. The conversion efficiency is 2 by 10 to the -7th power and the field of view of 40 arc seconds on the sky contains several hundred picture elements, approximately diffraction-limited resolution in a large telescope. The instrument has been used in studies of the sun, moon, Mercury, and VY Canis Majoris.

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