10-micron heterodyne stellar interferometer

Details 10-micron heterodyne stellar interferometer 10-micron heterodyne stellar interferometer

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974phrvl..33.1617j&link_type=abstract

Physical Review Letters, vol. 33, Dec. 30, 1974, p. 1617-1620.

Astronomy and Astrophysics

Astronomy

22

Infrared Astronomy, Infrared Interferometers, Mercury (Planet), Optical Heterodyning, Planetary Radiation, Diffraction Patterns, Optical Paths, Planetary Atmospheres, Stellar Spectra, Telescopes

Scientific paper

A spatial interferometer for 10-micron wavelength which uses two independent telescopes separated by 5.5 m, heterodyne detection of the infrared radiation, and path equalization by a variable-length RF cable, has given interference fringes from radiation of the planet Mercury. Continuous fringe observations during 4000 sec indicate remarkable stability in the optical-path difference through the atmosphere and the two telescopes, fluctuations between 20-sec averages being about 1/6 of the 10-micron wavelength.

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