Compact snapshot birefringent imaging Fourier transform spectrometer for remote sensing and endoscopy

Michael W. Kudenov; Bhaskar Banerjee; Victoria C. Chan; Eustace L. Dereniak

doi:10.1117/12.945873

19 November 2012 Compact snapshot birefringent imaging Fourier transform spectrometer for remote sensing and endoscopy

Michael W. Kudenov, Bhaskar Banerjee, Victoria C. Chan, Eustace L. Dereniak

Proceedings Volume 8542, Electro-Optical Remote Sensing, Photonic Technologies, and Applications VI; 854224 (2012) https://doi.org/10.1117/12.945873
Event: SPIE Security + Defence, 2012, Edinburgh, United Kingdom

Abstract

The design and implementation of a compact multiple-image Fourier transform spectrometer (FTS) is presented. Based on the multiple-image FTS originally developed by A. Hirai, the presented device offers significant advantages over his original implementation. Namely, its birefringent nature results in a common-path interferometer which makes the spectrometer insensitive to vibration. Furthermore, it enables the potential of making the instrument ultra-compact, thereby improving the portability of the sensor. The theory of the birefringent FTS is provided, followed by details of its specific embodiment. A laboratory proof of concept of the sensor, designed and developed at the Optical Detection Lab, is also presented. Spectral measurements of laboratory sources are provided, including measurements of light-emitting diodes and gas-discharge lamps. These spectra are verified against a calibrated Ocean Optics USB2000 spectrometer. Other data were collected outdoors and of a rat esophagus, demonstrating the sensor’s ability to resolve spectral signatures in both standard outdoor lighting and environmental conditions, as well as in fluorescence spectroscopy.

Citation Download Citation

Michael W. Kudenov, Bhaskar Banerjee, Victoria C. Chan, and Eustace L. Dereniak "Compact snapshot birefringent imaging Fourier transform spectrometer for remote sensing and endoscopy", Proc. SPIE 8542, Electro-Optical Remote Sensing, Photonic Technologies, and Applications VI, 854224 (19 November 2012); https://doi.org/10.1117/12.945873

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