14 May 2018 Compact LWIR polarimeter for cirrus ice properties
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A miniaturized long-wave InfraRed (LWIR) spectro-polarimeter is being developed as a prototype for the Compact Submm-Wave and LWIR Polarimeters (SWIRP) project. The polarimeter in development is a compact (20x20x40 cm) conical-scan instrument to measure the polarimetric radiation from ice cloud scattering at mm- submm (220 and 680 GHz) and IR (8.6, 11, and 12 m) bands. The LWIR polarimeter will provide a series of polarization measurements across the 8.5 - 12.5 micron band, measuring the full set of linear Stokes parameters (I, Q, U) as a function of wavelength. The spectro-polarimeter uses a combination of birefringent crystals, a Wollaston prism, a diffraction grating, and an uncooled microbolometer array to measure both the degree and angle of linear polarization across the spectral bandwidth by modulating the polarization flux in wavelength with a high order retarder.
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Kira A. Hart, Kira A. Hart, Russell A. Chipman, Russell A. Chipman, Dong L. Wu, Dong L. Wu, } "Compact LWIR polarimeter for cirrus ice properties", Proc. SPIE 10655, Polarization: Measurement, Analysis, and Remote Sensing XIII, 106550V (14 May 2018); doi: 10.1117/12.2305106; https://doi.org/10.1117/12.2305106

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