Exploiting spatio‐spectral aberrations for rapid synchrotron infrared imaging. (10th August 2021)

• Record Type: Journal Article
• Authors: Anand, Vijayakumar; Ng, Soon Hock; Katkus, Tomas; Maksimovic, Jovan; Klein, Annaleise R; Vongsvivut, Jitraporn; Bambery, Keith R; Tobin, Mark J; Juodkazis, Saulius
• Is Part Of: Journal of synchrotron radiation. Volume 28:Part 5(2021)
• Page Start: 1616
• Page End: 1619
• Publication Date: 2021-08-10
• Subjects: Infrared Microspectroscopy Beamline -- synchrotron -- hyperspectral imaging -- chromatic aberrations -- correlation optics; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577521007104
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : A correlation‐based semi‐synthetic computational optical approach has been applied to assess the possibilities of exploiting the spatio‐spectral aberrations of the Infrared Microspectroscopy Beamline to perform rapid imaging. Abstract : 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.