Abstract
We present the optical design, laboratory calibration and first field measurements of a dynamic target monitoring spectrometer (DTS) for detection of potassium emission lines at 766.491 and 769.897 nm in a flame under the two-dimensional orthogonal observation mode. DTS can provide high-spectral- resolution, high-spatial-resolution and high-throughput measurements by using imaging spatial heterodyne spectroscopy. Combined with a 0.035 nm spectral resolution and a 1.2 mrad spatial resolution in one dimension for each channel, 7.2° × 7°(vertical × horizontal) field of view is achieved in DTS. The high spectral resolution is important for identifying a very dim signal by a few spectra lines, and the high spatial resolution is a significant parameter for inferring accurate location of a flame per exposure and monitoring the trace of a dynamic flame varying from exposure to exposure. Finally, we demonstrate the ability to measure potassium spectra in a rapidly changing flame by DTS through a series of laboratory calibrations and field measurements.
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Luo, H., Xiong, W., Li, S., Li, Z., Hong, J. (2017). Optical Design and Measurements of a Dynamic Target Monitoring Spectrometer for Potassium Spectra Detection in a Flame. In: Urbach, H., Zhang, G. (eds) 3rd International Symposium of Space Optical Instruments and Applications. Springer Proceedings in Physics, vol 192. Springer, Cham. https://doi.org/10.1007/978-3-319-49184-4_6
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DOI: https://doi.org/10.1007/978-3-319-49184-4_6
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