Infrared Wire Grid Polarizers

Wire grid polarizers are used for splitting and filtering infrared light into parallel and perpendicularly polarized beams, such as required for many kinds of reflectance FTIR spectroscopy, ellipsometry, and polarimetry measurements. Wire grids are suitable for broadband applications over a wide range of wavelengths. Specac manufacture two types: holographic and free-standing grids. The former are produced on various substrates for the 2 - 35 μm wavelength range; the latter are tightly wound around a supporting frame and are best suited to wavelengths greater than 50 μm.