15 November 1993 Liquid crystal tunable light filters for surveillance and remote sensing applications
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In this paper we put forward some conceptual designs for liquid crystal tunable filters (LCTF's) that offer improved wavelength flexibility, tuning speed, power consumption and reliability, over the mechanical filter wheels presently baselined for the High Resolution Earth Processing Imager (HEPI) and Advanced Lightning Mapper (ALM) geosynchronous remote sensing experiments. We also point out advantages that accrue from the extremely wide acceptance angle (F 1) achievable with birefringent filters. Thermal vacuum testing and radiation damage analysis will be required to investigate the space hardening of these new filters.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter V. Foukal, Peter J. Miller, Clifford C. Hoyt, "Liquid crystal tunable light filters for surveillance and remote sensing applications", Proc. SPIE 1952, Surveillance Technologies and Imaging Components, (15 November 1993); doi: 10.1117/12.161394; https://doi.org/10.1117/12.161394

Optical filters

Tunable filters

Liquid crystals

Remote sensing

Fabry–Perot interferometers

Image filtering


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