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Proceedings Paper

Miniature Raman spectroscopy utilizing stabilized diode lasers and 2D CMOS detector arrays
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Paper Abstract

A miniature Raman spectrometer was designed in a rapid development cycle (< 4 months) to investigate the performance capabilities achievable with two dimensional (2D) CMOS detectors found in cell phone camera modules and commercial off the shelf optics (COTS). This paper examines the design considerations and tradeoffs made during the development cycle. The final system developed measures 40 mm in length, 40 mm in width, 15 mm tall and couples directly with the cell phone camera optics. Two variants were made: one with an excitation wavelength of 638 nm and the other with a 785 nm excitation wavelength. Raman spectra of the following samples were gathered at both excitations: Toluene, Cyclohexane, Bis(MSB), Aspirin, Urea, and Ammonium Nitrate. The system obtained a resolution of 40 cm-1. The spectra produced at 785 nm excitation required integration times of up to 10 times longer than the 1.5 seconds at 638 nm, however, contained reduced stray light and less fluorescence which led to an overall cleaner signal.

Paper Details

Date Published: 20 February 2017
PDF: 14 pages
Proc. SPIE 10110, Photonic Instrumentation Engineering IV, 1011019 (20 February 2017); doi: 10.1117/12.2252396
Show Author Affiliations
Bryan Auz, Ocean Optics, Inc. (United States)
Joseph Bonvallet, Ocean Optics, Inc. (United States)
John Rodriguez, Ocean Optics, Inc. (United States)
Ty Olmstead, Ocean Optics, Inc. (United States)

Published in SPIE Proceedings Vol. 10110:
Photonic Instrumentation Engineering IV
Yakov G. Soskind; Craig Olson, Editor(s)

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