25mm Dia. ZnSe, IR Holographic Wire Grid Polarizer

Product Details Special care should be taken when handling Zinc Selenide as it is a toxic material. Always wear rubber or plastic gloves to avoid risk of contamination. Designed for Wavelengths Ranging from 2 – 30μm Various Substrates Available 360° Rotation Using Metric Polarizer Mounts Infrared (IR) Wire Grid Polarizers are used to polarize light from unpolarized infrared laser sources, as well as attenuate light from polarized ones. When two wire grid polarizers are used together, high extinction ratios greater than 40,000:1 can be achieved. The polarization axis of each polarizer is marked by two white lines etched into the surface of its protective ring. Infrared (IR) Wire Grid Polarizers are used in a variety of medical imaging, aerospace, FTIR spectrophotometry, and analytical instrumentation applications. Infrared (IR) Wire Grid Polarizers are manufactured by a special holographic technique that creates sub-micron wire grid spacing. Compared to conventional ruled wire grid methods, the holographic method creates finer groove spacing which optimizes short wavelength performance. We offer holographic wire grid polarizers of Barium Fluoride (BaF2), Zinc Selenide (ZnSe), Thallium Bromoiodide (KRS-5), and Germanium (Ge). Note: Special care should be taken when handling KRS-5 and Zinc Selenide as they are toxic materials. Always wear rubber or plastic gloves to avoid risk of contamination. The active wire-grid surface of the polarizer is extremely delicate and nothing should be allowed to touch it, as this can damage the optic. Only dry air is recommended as a cleaning method. If necessary, this optic should be handled by the edges only and with protected fingers. Specifications General Type: Linear Polarizer Note: Notches on polarizer ring are aligned with wires of wire grid (max. reflection) Physical & Mechanical Properties Clear Aperture CA (mm): 18.0 Diameter (mm): 25.00 Parallelism (arcmin): ≤3 Dimensional Tolerance (mm): ±0.2 Construction: Wire Grid Groove Parallelism to Edge (°): N/A Substrate Thickness (mm): 2.00 Optical Properties Angle of Incidence (°): 0 Extinction Ratio: 150:1 @ 3µm, 300:1 @ 10µm Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Zinc Selenide (ZnSe) Polarization: Notches on polarizer ring are aligned with wires of wire grid Transmission (%): >50 Wavelength Range (nm): 2500 – 19000 Surface Flatness (P-V): λ/20 @ 10.6μm Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 50 W/cm 2 Groove Density (grooves/mm): 2700.00 Threading & Mounting Mount Thickness (mm): 5.0 +0.2/-0.1 Ring Thickness (mm): ±0.1 Mount: Black Anodized Aluminum Environmental & Durability Factors Operating Temperature (°C): -20 to 75 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 247: Compliant ×