Open AccessExploiting spatio‐spectral aberrations for rapid synchrotron infrared imaging
Author(s) -
Anand Vijayakumar,
Ng Soon Hock,
Katkus Tomas,
Maksimovic Jovan,
Klein Annaleise R,
Vongsvivut Jitraporn,
Bambery Keith R,
Tobin Mark J,
Juodkazis Saulius
Publication year - 2021
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577521007104
Subject(s) - optics , synchrotron , detector , infrared , beamline , cardinal point , mercury cadmium telluride , condenser (optics) , spectrometer , infrared microscopy , materials science , fourier transform infrared spectroscopy , chemical imaging , physics , beam (structure) , computer science , hyperspectral imaging , light source , artificial intelligence
The Infrared Microspectroscopy Beamline at the Australian Synchrotron is equipped with a Fourier transform infrared (FTIR) spectrometer, which is coupled with an infrared (IR) microscope and a choice of two detectors: a single‐point narrow‐band mercury cadmium telluride (MCT) detector and a 64 × 64 multi‐pixel focal plane array (FPA) imaging detector. A scanning‐based point‐by‐point mapping method is commonly used with a tightly focused synchrotron IR beam at the sample plane, using an MCT detector and a matching 36× IR reflecting objective and condenser (NA = 0.5), which is time consuming. In this study, the beam size at the sample plane was increased using a 15× objective and the spatio‐spectral aberrations were investigated. A correlation‐based semi‐synthetic computational optical approach was applied to assess the possibilities of exploiting the aberrations to perform rapid imaging rather than a mapping approach.