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Proceedings Paper

Rocket-Borne Cryogenically Cooled Field-Widened Interferometer For The 2 To 8µm Spectral Region
Author(s): Ralph H. Haycock
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Paper Abstract

A liquid nitrogen cooled rocketborne near infrared interferometer spectrometer has been developed using compensating wedge prisms to achieve a wide field-of-view and using a gas-lubricated bearing slide for the movable mirror carriage to maintain stable precision align-ment and scanning speeds of 1 second/scan. A nickel manganese iron alloy has been developed which has very nearly the same thermal physical properties of calcium flouride, thus rigid mounting of the calcium flouride is possible which reduces the possibility of fracture on cool down and assures optical alignment after the instrument is subjected to the severe vibration of the rocket flight. An entendue of 0.67 cm2 sr has been achieved and the bearing smoothness stiffness and control are sufficient to yield a resolution of at least 2 cm-1. A liquid helium cooled bismuth doped silicon detector is used providing a NESR of 1.5 x 10-12 watt cm-2 sr-1 at 5 µm when operating at a scan time of 1.3 seconds.

Paper Details

Date Published: 29 October 1979
PDF: 10 pages
Proc. SPIE 0191, Multiplex and/or High Throughput Spectroscopy, (29 October 1979); doi: 10.1117/12.957823
Show Author Affiliations
Ralph H. Haycock, Utah State University (United States)

Published in SPIE Proceedings Vol. 0191:
Multiplex and/or High Throughput Spectroscopy
George A. Vanasse, Editor(s)

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