Theoretical And Practical Aspects Of Cryogenic-Multiplex Spectroscopy

Geert Wijntjes

doi:10.1117/12.959344

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3 November 1980 Theoretical And Practical Aspects Of Cryogenic-Multiplex Spectroscopy

Geert Wijntjes

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Proceedings Volume 0245, Cryogenically Cooled Sensor Technology; (1980) https://doi.org/10.1117/12.959344
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

Abstract

Refrigeration of the optics of a spectroradiometer equipped with a low background detector can greatly improve the radiometric sensitivity of the radiometer when observing optically thin or other weak sources. The well known advantages of multiplex spectroscopy, for example by use of a Fourier Transform Spectrometer (FTS) of the Michelson type, in general still apply. Because of the nature of the sianals from the FTS, the existing data base for low background detectors has however only limited applicability in predicting the performance in an FTS for low background conditions. A discussion of the various noise and error sources that affect performance and some practical solutions minimizing their effect (applicable to a Michelson Interferometer operating at a useful resolution and scan rates) will be presented. Results obtained with a number of cryogenic Michelson interferometers in a variety of applications will also be presented.

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Geert Wijntjes "Theoretical And Practical Aspects Of Cryogenic-Multiplex Spectroscopy", Proc. SPIE 0245, Cryogenically Cooled Sensor Technology, (3 November 1980); https://doi.org/10.1117/12.959344

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