Open AccessQuasi-collinear IR AOTF based on mercurous halide single crystals for spatio-spectral hyperspectral imaging
Author(s) -
Lukáš Krauz,
Petr Páta,
Jan Bednář,
Miloš Klíma
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.420571
Subject(s) - hyperspectral imaging , optics , spectral resolution , materials science , infrared , resolution (logic) , spectral imaging , spectral line , remote sensing , physics , computer science , astronomy , artificial intelligence , geology
The paper aims to show the advantages of the infrared-optimised quasi-collinear AOTF (acousto-optic tunable filter) for the spatio-spectral hyperspectral imaging system. The optimisation process is presented based on the selected tetragonal anisotropic materials with exceptional optical and acousto-optical properties in IR (infrared) spectral region. These materials are further compared in terms of their features and suitability for AOTF design. The spectral resolution is considered as the main optimising parameter. Resulting from the analysis, the mercurous chloride (Hg 2 Cl 2 ) single crystal is selected as a representative of the mercurous halide family for the presentation of the quasi-collinear AOTF model operating in LWIR (long-wave infrared) spectral band. The overall parameters of the AOTF model such as spectral resolution, chromatic field of view, acoustic frequency, and operational power requirements are estimated and discussed in results.