15 October 2012 Optical design and performance testing of an athermal SWIR gas correlation imager
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Gas correlation imagers are important instruments for remotely detecting effluent emissions. However, making a functional design for field testing is non-trivial given the range of environmental conditions the system may be operated under and the required matched imaging performance for both channels. We present a dual channel 7 degree full field of view f/2.5 athermal optical design athermalized from 0 to 50 degrees C that operates in the wavelength range of 2.0 to 2.5 microns suitable for methane imaging. We present the optical design, tolerance budget, and alignment plan used for the system. Predicted and as-built performance data including interferometric and ensquared energy measurements for both imaging channels are also shown.
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A. Tanbakuchi, A. Tanbakuchi, M. Smith, M. Smith, J. Mercier, J. Mercier, S. Vigil, S. Vigil, T. Embree, T. Embree, A. Ison, A. Ison, } "Optical design and performance testing of an athermal SWIR gas correlation imager", Proc. SPIE 8491, Optical System Alignment, Tolerancing, and Verification VI, 84910B (15 October 2012); doi: 10.1117/12.928001; https://doi.org/10.1117/12.928001

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