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20 February 2017 Miniature Raman spectroscopy utilizing stabilized diode lasers and 2D CMOS detector arrays
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Proceedings Volume 10110, Photonic Instrumentation Engineering IV; 1011019 (2017)
Event: SPIE OPTO, 2017, San Francisco, California, United States
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.
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© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bryan Auz, Joseph Bonvallet, John Rodriguez, and Ty Olmstead "Miniature Raman spectroscopy utilizing stabilized diode lasers and 2D CMOS detector arrays", Proc. SPIE 10110, Photonic Instrumentation Engineering IV, 1011019 (20 February 2017);

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