A compact LWIR imaging spectrometer with a variable gap Fabry-Perot interferometer

Fang Zhang; Jiaobo Gao; Nan Wang; Yujie Zhao; Lei Zhang; Shan Gao

doi:10.1117/12.2257646

28 February 2017 A compact LWIR imaging spectrometer with a variable gap Fabry-Perot interferometer

Fang Zhang, Jiaobo Gao, Nan Wang, Yujie Zhao, Lei Zhang, Shan Gao

Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102562W (2017) https://doi.org/10.1117/12.2257646
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China

Abstract

Fourier transform spectroscopy is a widely employed method for obtaining spectra, with applications ranging from the desktop to remote sensing. The long wave infrared (LWIR) interferometric spectral imaging system is always with huge volume and large weight. In order to miniaturize and light the instrument, a new method of LWIR spectral imaging system based on a variable gap Fabry-Perot (FP) interferometer is researched. With the system working principle analyzed, theoretically, it is researched that how to make certain the primary parameter, such as, the reflectivity of the two interferometric cavity surfaces, field of view (FOV) and f-number of the imaging lens. A prototype is developed and a good experimental result of CO2 laser is obtained. The research shows that besides high throughput and high spectral resolution, the advantage of miniaturization is also simultaneously achieved in this method.

Citation Download Citation

Fang Zhang, Jiaobo Gao, Nan Wang, Yujie Zhao, Lei Zhang, and Shan Gao "A compact LWIR imaging spectrometer with a variable gap Fabry-Perot interferometer", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102562W (28 February 2017); https://doi.org/10.1117/12.2257646

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