AOTF-Based Spectral Imaging for Balloon-Borne Platforms

Chanover, N. J.; Voelz, David G.; Glenar, D. A.; Young, E. F.

doi:10.1142/s2251171714400054

Cited by 9 publications

(7 citation statements)

References 37 publications

(27 reference statements)

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“…The testing machine provides the controlled uniaxial compression of a crystalline specimen installed between press plates with a specialized floating hinge. To demonstrate feasibility of the proposed technique we chose an anisotropic material widely utilized in spectral imaging devices and laser instrumentation [8][9][10][11][12], tetragonal form of tellurium dioxide α-TeO2. Layout of the experimental setup is shown in figure 1.…”

Section: Methodsmentioning

confidence: 99%

Mueller-Matrix Stress Mapping in TeO2 Crystals Under Dynamic Loading

Khokhlov,

Bykov,

Marchenkov

et al. 2023

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Components of optoelectronic devices installed in aircrafts and space vehicles experience significant mechanical loads during their operation. Excessive and cyclic loads may lead to the defect growth or the fatigue failure. In this paper, we describe a non-destructive imaging technique for stress mapping in anisotropic crystalline materials during bench test. The technique is based on Mueller-matrix imaging and the material photoelasticity. The results of experimental studies for two observation directions coinciding with different crystallographic axes of TeO2 are presented. Main limitations and further potential development of the technique are discussed.

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Section: Methodsmentioning

confidence: 99%

Mueller-Matrix Stress Mapping in TeO2 Crystals Under Dynamic Loading

Khokhlov,

Bykov,

Marchenkov

et al. 2023

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“…A detailed description of the operating principles of AOTFs is beyond the scope of this paper, but extensive discussions of their operational capabilities are provided in N. J. Chanover et al. ( 2014 ), O. I. Korablev et al. ( 2018 ) and the references therein.…”

Section: Instrument Descriptionsmentioning

confidence: 99%

The Development and Demonstration of the Portable Acousto‐Optic Spectrometer for Astrobiology in Cave Environments

Chanover

Uckert

Voelz

et al. 2023

Earth and Space Science

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The development of in situ instrumentation for the detection of biomarkers in planetary cave environments is critical for the search for evidence of present or past life in our solar system. As refugia from the harsh ionizing radiation environments on the surfaces of airless solar system bodies or those with thin atmospheres, planetary caves represent a tantalizing location in which to conduct searches for extraterrestrial life (Viúdez-Moreiras, 2021). There are myriad challenges associated with investigations of planetary subsurface environments. However, once subsurface access is achieved, the exploration of planetary caves will require robust technologies with low size, weight and power (SWaP) in order to overcome the operational limitations of a small platform.The detection of extant or extinct life in planetary subsurfaces requires the identification of potential biomarkers, or signatures of physical structure, chemical composition, or metabolic processes associated with living organisms (Uckert et al., 2017). Broadly speaking, a wide range of both passive and active in situ techniques have been developed for and employed in the characterization of planetary surface environments in an effort to identify potential biomarkers. These techniques include (but are not limited to) mass spectrometry (

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“…AOTFs have become a popular tool for various hyperspectral imaging applications in biomedicine [ 1 , 2 ], agriculture [ 3 , 4 ], aerospace [ 5 , 6 ] and other fields. Based on anisotropic Bragg diffraction of wide-band light by ultrasound in crystalline media, these spectral elements provide a good combination of optical (high spectral and spatial resolution, wide tuning range, etc.)…”

Section: Introductionmentioning

confidence: 99%

Spectral Imaging Experiments with Various Optical Schemes Based on the Same AOTF

et al. 2021

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Spectral image filtration by means of acousto-optical tunable filters (AOTFs) has multiple applications. For its implementation, a few different optical schemes are in use. They differ in image quality, number of coupling components, dimensions and alignment complexity. To choose the optical system of AOTF-based spectral imager properly, many factors have to be considered. Though various schemes of acousto-optic (AO) filtration have been tested and discussed, their comparative analysis has not been reported up to now. In this study, we assembled the four most popular schemes (confocal, collimating, tandem and double-path) using the same AO cells and experimentally compared their main features. Depending on the application, each scheme may be the basis of compact cost-effective spectral imaging devices.

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AOTF-Based Spectral Imaging for Balloon-Borne Platforms

Cited by 9 publications

References 37 publications

Mueller-Matrix Stress Mapping in TeO2 Crystals Under Dynamic Loading

Mueller-Matrix Stress Mapping in TeO2 Crystals Under Dynamic Loading

The Development and Demonstration of the Portable Acousto‐Optic Spectrometer for Astrobiology in Cave Environments

Spectral Imaging Experiments with Various Optical Schemes Based on the Same AOTF

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