Infrared (IR) spectroscopic imaging is an emerging modality for biological tissue analysis that has traditionally employed an interferometer for spectral discrimination. Recent technology developments have made discrete frequency sources, both lasers and filters, practical for imaging. The use of quantum cascade lasers in particular, presents new opportunities as well as challenges. Here we describe results from a novel point scanning confocal IR microscope and demonstrate the performance imaging several important spectral bands of lung tissue. Results show the possibility of discrete frequency (DF) absorbance measurements with RMS noise levels down to 0.34 mAU in 0.25 ms.

Original languageEnglish (US)
Title of host publicationBiomedical Vibrational Spectroscopy 2016
Subtitle of host publicationAdvances in Research and Industry
EditorsAnita Mahadevan-Jansen, Wolfgang Petrich
ISBN (Electronic)9781628419382
StatePublished - 2016
EventBiomedical Vibrational Spectroscopy 2016: Advances in Research and Industry - San Francisco, United States
Duration: Feb 13 2016Feb 14 2016

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


OtherBiomedical Vibrational Spectroscopy 2016: Advances in Research and Industry
Country/TerritoryUnited States
CitySan Francisco


  • Mid-infrared spectroscopy
  • Quantum Cascade Laser (QCL)
  • chemical imaging
  • discrete frequency infrared (DF-IR)
  • microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging
  • Biomaterials


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