25.4mm Dia., 4mm Thick, Uncoated, ISP Optics Thallium Bromoiodide (KRS-5) Window | K5-W-25-4

Product Details Broad Transmission from 700nm – 40μm Non-Hydroscopic Ideal for FTIR Spectroscopy with Aqueous Samples ISP Optics Thallium Bromoiodide (KRS-5) Windows provide flat transmission across the broad wavelength range of 700nm – 40μm. KRS-5 is non-hygroscopic and relatively insoluble in water, allowing for its use in FTIR spectroscopy as liquid cell windows for the analysis of aqueous samples. These windows also have good chemical resistance except against strong acids. ISP Optics Thallium Bromoiododide (KRS-5) Windows are ideal for use in FTIR spectroscopy, as protective windows for acid-sensitive or hygroscopic optics, or as substrates for infrared holographic polarizers. Note: Thallium bromoiodide (KRS-5) is a toxic material that can be absorbed through the skin. Gloves must be worn while handling this material. KRS-5 has a tendency to cold flow and the shape of these optics may change over time. Specifications General Model Number: K5-W-25-4 Type: Protective Window Type of Window: Crystal Physical & Mechanical Properties Clear Aperture CA (mm): 21.59 Diameter (mm): 25.40 +0.00/-0.13 Thickness (mm): 4.00 ±0.13 Parallelism (arcmin): <3 Bevel: Protective as needed Clear Aperture (%): 85 Edges: Fine Ground Poisson's Ratio: 0.37 Young's Modulus (GPa): 31 Knoop Hardness (kg/mm 2 ): 40.20 Optical Properties Coating: Uncoated Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Thallium Bromoiodide (KRS-5) Index of Refraction (n d ): 2.45 @ 1μm 2.38 @ 4μm 2.37 @ 10μm 2.21 @ 40μm Surface Quality: 60-40 Wavelength Range (nm): 700 - 40000 Surface Flatness (P-V): λ/10 @ 10.6μm Material Properties Density (g/cm 3 ): 7.37 Coefficient of Thermal Expansion CTE (10 -6 /°C): 6.0 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 240: Compliant ×