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Development of a Liquid Nitrogen Cooled Field Widened Interferometer.
Final rept. 1 Feb 72-30 Nov 73,
UTAH STATE UNIV LOGAN ELECTRO-DYNAMICS LAB
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Under contract with Air Force Cambridge Research Laboratories, personnel from Electro-Dynamics Laboratories at Utah State University have developed an infrared measurement system for installation in a KC 135 aircraft. The system consists of a liquid nitrogen cooled, field widened interferometer spectrometer incorporated in a cryogenic housing and the attendant control console. The interfereometer is cooled to liquid nitrogen temperature and the detector is further cooled to liquid helium temperature. A special top plate for the interferometer housing was designed and built which allows the instrument to be used on the ground. Frosting is prevented on the optical port by using cold dry nitrogen gas as a thermal barrier between the window and the atmosphere. Using the ground based system the emission spectra of the night sky from 1 - 2.7 micrometer has been resolved in less than 10 seconds. A measurement made at White sands, New Mexico is included as part of this report. Modified author abstract
APPROVED FOR PUBLIC RELEASE