AVIRIS Foreoptics, Fiber Optics And On-Board Calibrator

M. P. Chrisp; T. Chrien; L. Steimle

doi:10.1117/12.942282

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1 January 1987 AVIRIS Foreoptics, Fiber Optics And On-Board Calibrator

M. P. Chrisp, T. Chrien, L. Steimle

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Proceedings Volume 0834, Imaging Spectroscopy II; (1987) https://doi.org/10.1117/12.942282
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

The foreoptics, fiber optic system and calibration source of the Airborne Visible/ Infrared Imaging Spectrometer (AVIRIS) are described. The foreoptics, based on a modified Kennedy scanner, is coupled by optical fibers to the four spectrometers. The optical fibers allowed convenient positioning of the spectrometers in the limited space and enabled simple compensation of the scanners thermal defocus (at the -23°C operating temperature) by active control of the fiber focal plane position. A challenging requirement for the fiber optic system was the transmission of the spectral range 1.85 to 2.45 microns at .45 numerical aperture. This was solved with custom fluoride glass fibers from Verre Fluore. The on-board calibration source is also coupled to the spectrometers by the fibers and provides two radiometric levels and a reference spectrum to check the spectrometers alignment. Results on performance of the assembled subsystems are presented.

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M. P. Chrisp, T. Chrien, and L. Steimle "AVIRIS Foreoptics, Fiber Optics And On-Board Calibrator", Proc. SPIE 0834, Imaging Spectroscopy II, (1 January 1987); https://doi.org/10.1117/12.942282

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