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Optical Engineering • Open Access

Infrared acousto-optic tunable filter point spectrometer for detection of organics on mineral surfaces
Author(s): Rula Tawalbeh; David G. Voelz; David A. Glenar; Xifeng Xiao; Nancy J. Chanover; Robert Hull; David Kuehn

Paper Abstract

A prototype infrared (IR) acousto-optic tunable filter (AOTF)-based point spectrometer has been designed for examining and analyzing potential biological samples collected in situ from the planets or other solar system objects. The reflectance spectrometer operates at a wavelength range of 1.6 to 3.6 μm, which is diagnostic of minerals and organics, and inspects a 1-mm sized spot on the sample. The tuning component is the AOTF that has been utilized in a variety of spectral detection applications. The instrument’s specification and design approach including the selected components is described. The data acquisition system, the electronic components, and their interconnections are presented. The instrument’s radiometric performance is examined and described by a noise equivalent reflectance value of 0.13% that is obtained from the laboratory measurements. The device has been demonstrated by measuring the reflectance spectra for a variety of geological samples and comparing the results with the United States Geological Survey data.

Paper Details

Date Published: 21 June 2013
PDF: 11 pages
Opt. Eng. 52(6) 063604 doi: 10.1117/1.OE.52.6.063604
Published in: Optical Engineering Volume 52, Issue 6
Show Author Affiliations
Rula Tawalbeh, New Mexico State Univ. (United States)
David G. Voelz, New Mexico State Univ. (United States)
David A. Glenar, Univ. of Maryland, Baltimore County (United States)
Xifeng Xiao, New Mexico State Univ. (United States)
Nancy J. Chanover, New Mexico State Univ. (United States)
Robert Hull, New Mexico State Univ. (United States)
David Kuehn, Pittsburg State Univ. (United States)

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