You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
1 January 1987AVIRIS Foreoptics, Fiber Optics And On-Board Calibrator
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.
The alert did not successfully save. Please try again later.
M. P. Chrisp, T. Chrien, 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