Discrete frequency infrared imaging using quantum cascade lasers for biological tissue analysis

Kevin Yeh; Rohit Bhargava

doi:10.1117/12.2230003

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7 March 2016 Discrete frequency infrared imaging using quantum cascade lasers for biological tissue analysis

Kevin Yeh, Rohit Bhargava

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Proceedings Volume 9704, Biomedical Vibrational Spectroscopy 2016: Advances in Research and Industry; 970406 (2016) https://doi.org/10.1117/12.2230003
Event: SPIE BiOS, 2016, San Francisco, California, United States

Abstract

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.

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Kevin Yeh and Rohit Bhargava "Discrete frequency infrared imaging using quantum cascade lasers for biological tissue analysis", Proc. SPIE 9704, Biomedical Vibrational Spectroscopy 2016: Advances in Research and Industry, 970406 (7 March 2016); https://doi.org/10.1117/12.2230003

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