Liquid Crystal Tunable Filter

The liquid crystal tunable filter controls liquid crystal elements through an electronic unit to transmit light of a specific wavelength while blocking other light. It is an optical filter designed based on the birefringence effect of liquid crystal molecules and the principle of polarized light interference.

The tunable filter adopts high-precision liquid crystal phase retarders and a cascaded structure. It uses an automatic calibration and correction system for high-precision calibration, and connects to a computer via a USB interface. By inputting the required wavelength and other parameters on the supporting software operation interface, it achieves flexible narrow-band filtering of incident light. The product has adaptive temperature compensation capability and can correct spectral drift caused by changes in the field of view angle using a calibration database, meeting the needs of large-field-of-view imaging. It can be combined with imaging lenses and image sensors (such as CMOS/InGaAs) to form a compact hyperspectral imaging system.