Wire grid polarizer GS series

UVMIRcircular

Wire grid polarizers for the mid-infrared spectral range. Our polarizers are available in a wide range of sizes and substrates to suit the required performance. We have four main product types: • FTIR accessory polarizers (GS12000-series) - these fit to the aperture ports on certain Specac FTIR accessories. • "Opto-Physics" polarizers (GS57500-series) - to fit standard 25 mm and 50 mm optical mounts. • Standard IR polarizers, custom mounted - can be ordered as unmounted 25 mm optics or in 41, 55, 70, or 90 mm mounts. • High extinction IR polarizers - as above, but with increased grid specification for top performance. • 4000 lines/mm or 250o lines / mm on the substrate • Choice of KRS-5, Ge, BaF2, CaF2 and ZnSe substrates • Choice of O.D. and C.A. sizes • Compatible with Specac FTIR accessories • Fit into Polarizer Rotatable Mounts GS12510 and GS12500 • Offered in three specific classifications – Standard, High Extinction Ratio (HER) and Image Quality (IQ) Infrared polarizers The manufacturing process involves exposing a photo-resist coating on a suitable material substrate to an interferometrically-generated fringe pattern from a monochromatic UV source. The regular sinusoidal profile of the developed photo-resist is subsequently metal-coated at an oblique angle to create an array of fine parallel lines at a set period. This technique lends itself well to the generation of extremely uniform submicron grid wire spacings (an option of 2500 or 4000 lines per mm), which have a significantly reduced level of light scattering in comparison to traditional ruled wire grid polarizers.