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    Passive LWIR hyperspectral imaging of surfaces contaminated by CWA droplets

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    1736888.pdf (1.526Mb)
    Date
    2019-05-17
    Author
    Landström, L
    Kullander, Fredrik
    Wästerby, Pär
    Røen, Bent Tore
    Metadata
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    Abstract
    A passive LWIR camera based on a focal plane array detector was used to capture hyperspectral images of different scenes where low volatile chemical warfare agent (CWA) and simulant droplets were deposited on a variety of substrates. Four different CWA; mustard gas (HD), cyclosarin (GF), VX, VR, and two simulant liquids; dimethyl methylphosphonate (DMMP) and triethyl phosphate (TEP) were used as surface contaminants and applied to the substrates as 5 μl droplets. The trials were performed outdoors with the scene close to the ground and the camera imaging at an angle of approximately 35° and a stand-off distance of about 2 m, i.e., mainly the reflected radiation from the cold sky in combination with the thermal emission from the scene was observed. Brightness temperature spectra were extracted from the hyperspectral data cubes and compared to results from a thin film model as well as reference LWIR spectra of the liquids.
    URI
    http://hdl.handle.net/20.500.12242/2660
    DOI
    10.1117/12.2520420
    Description
    Landström, L; Kullander, Fredrik; Wästerby, Pär; Røen, Bent Tore. Passive LWIR hyperspectral imaging of surfaces contaminated by CWA droplets. Proceedings of SPIE, the International Society for Optical Engineering 2019 ;Volum 11010.
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