15 February 2017 Application of LC and LCoS in Multispectral Polarized Scene Projector (MPSP)
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A Multispectral Polarized Scene Projector (MPSP) had been developed in the short-wave infrared (SWIR) regime for the test & evaluation (T&E) of spectro-polarimetric imaging sensors. This MPSP generates multispectral and hyperspectral video images (up to 200 Hz) with 512×512 spatial resolution with active spatial, spectral, and polarization modulation with controlled bandwidth. It projects input SWIR radiant intensity scenes from stored memory with user selectable wavelength and bandwidth, as well as polarization states (six different states) controllable on a pixel level. The spectral contents are implemented by a tunable filter with variable bandpass built based on liquid crystal (LC) material, together with one passive visible and one passive SWIR cholesteric liquid crystal (CLC) notch filters, and one switchable CLC notch filter. The core of the MPSP hardware is the liquid-crystal-on-silicon (LCoS) spatial light modulators (SLMs) for intensity control and polarization modulation.
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Haiping Yu, Haiping Yu, Lei Guo, Lei Guo, Shenggang Wang, Shenggang Wang, Jack Lippert, Jack Lippert, Le Li, Le Li, } "Application of LC and LCoS in Multispectral Polarized Scene Projector (MPSP)", Proc. SPIE 10125, Emerging Liquid Crystal Technologies XII, 1012519 (15 February 2017); doi: 10.1117/12.2265910; https://doi.org/10.1117/12.2265910


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