Design of high performance FLIR for multiple applications

Ram N. Singh

doi:10.1117/12.256092

4 November 1996 Design of high-performance FLIR for multiple applications

Ram N. Singh

Proceedings Volume 2818, Multispectral Imaging for Terrestrial Applications; (1996) https://doi.org/10.1117/12.256092
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

With the advent of one or two dimensional focal plane arrays operating in 8 - 12 micrometer band, advanced second generation IR imaging systems are becoming possible. These systems can generally provide higher spatial resolutions and higher temperature sensitivity and are likely to be quite compact and light weight. A high performance thermal imager has been designed as a part of dual use night vision technology keeping in view medical and other applications. The present paper describes the trends and advances in imaging systems using second generation focal plane arrays (FPAs) operating in longwave infrared region. The high performance thermal imager has been designed at our laboratory using 288 multiplied by 4 linear MCT focal plane array received from SOFRADIR, France. The system has a twin magnification giving FOV of 8 degrees multiplied by 4.2 degrees and 2.7 degrees multiplied by 1.4 degrees using diffraction limited f/2 system having maximum optics aperture of 165 mm, yielding a systems NETD of better than 0.1 degree Celsius. The paper focuses attention on the optimization of variable afocal telescopes, optics aperture, FOVs and the MRTD. An experimental scheme of fixed pattern noise compensation in real time using two servo controlled standard reference sources, has been worked out. The system has been designed on modular approach so that, just by changing the front afocal telescope, system could be used for both civilian as well as military applications.

Citation Download Citation

Ram N. Singh "Design of high-performance FLIR for multiple applications", Proc. SPIE 2818, Multispectral Imaging for Terrestrial Applications, (4 November 1996); https://doi.org/10.1117/12.256092

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