Rocket-Borne Cryogenically Cooled Field-Widened Interferometer For The 2 To 8µm Spectral Region

Ralph H. Haycock

doi:10.1117/12.957823

29 October 1979 Rocket-Borne Cryogenically Cooled Field-Widened Interferometer For The 2 To 8µm Spectral Region

Ralph H. Haycock

Proceedings Volume 0191, Multiplex and/or High Throughput Spectroscopy; (1979) https://doi.org/10.1117/12.957823
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

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^-12watt cm-2 sr^-1 at 5 µm when operating at a scan time of 1.3 seconds.

Citation Download Citation

Ralph H. Haycock "Rocket-Borne Cryogenically Cooled Field-Widened Interferometer For The 2 To 8µm Spectral Region", Proc. SPIE 0191, Multiplex and/or High Throughput Spectroscopy, (29 October 1979); https://doi.org/10.1117/12.957823

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