Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 649, Issue 1, Pages 172-176Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2010.12.095
Keywords
Synchrotron radiation; Infrared imaging; Focal plane array (FPA); Multi-element detector (MED); Fourier transform infrared (FT-IR); Infrared microspectroscopy; High resolution microscopy; Image reconstruction
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Table-top Fourier transform infrared (FT-IR) imaging using focal plane array (FPA) multi-element detectors is an increasingly popular chemical microscopy technique because it can provide microspectroscopic images of large sample areas in short times at moderate spatial resolution. The novel IR beamline IRENI at the Synchrotron Radiation Center (Wisconsin, USA), the first dedicated multi-beam synchrotron-based FT-IR imaging system, offers, within minutes, high quality chemical images at the highest available spatial resolution (diffraction-limited at all mid-IR wavelengths) with a pixel size of 0.54 x 0.54 mu m(2) for transmission measurements. Due to this very high spatial sampling, mathematical image enhancement algorithms such as deconvolution and total variation (TV) reconstruction can be implemented to improve image contrast and thus spatial resolution. This is demonstrated for US Air force (USAF) targets, micron-sized aluminum beads, and a single living algal cell. (C) 2010 Elsevier B.V. All rights reserved.
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