These are high-resolution (Doppler) filters and low resolution (imaging) filters. The technology uses nematic liquid crystal as the tuning medium in Fabry-Perot interferometers. Proprietary NUV – LWIR designs.

Please download and read a paper on the properties of SSI Liquid Crystal Tunable Filters.


  • Precise electronic wavelength selection
  • Completely solid-state design
  • Remarkable ease of use
  • Extreme resistance to shock and vibration
  • Rapid tuning on the order of milliseconds
  • Low-voltage analog input (0-10V max)
  • Excellent background rejection
  • Remarkable image quality
  • Diameters from 10 to 152 mm
  • Wavelength regions from 500 nm to 14 µm
  • Spectral resolution from 0.002 to 36 Å (VIS)
  • Absolutely no closed-loop control