25.4mm Dia., 4mm Thick, Uncoated, ISP Optics Lithium Fluoride (LiF) Window | LF-W-25-4

Product Details Excellent Vacuum UV (VUV) Transmission High Transmission from 150nm – 6μm Low Index of Refraction ISP Optics Lithium Fluoride (LiF) Windows provide excellent transmission in the vacuum ultraviolet (VUV) wavelength range of 150 – 200nm, as well as at the hydrogen Lyman-alpha line (121nm). In addition to high transmission into the UV, these windows also feature superior transmission in the Visible and Infrared up to 6µm. Lithium fluoride has a low index of refraction, allowing these windows to be used without an anti-reflection (AR) coating. ISP Optics Lithium Fluoride (LiF) Windows are ideal for use as UV transmission windows in spectroscopy applications, as a diffracting element in X-ray spectrometry, or as infrared windows for thermal imaging applications. Note: Lithium fluoride is sensitive to thermal shock and is attacked by atmospheric moisture at temperatures above 400°C. Specifications General Model Number: LF-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 (%): 90 Edges: Fine Ground Poisson's Ratio: 0.33 Young's Modulus (GPa): 64.97 Knoop Hardness (kg/mm 2 ): 102.00 Optical Properties Coating: Uncoated Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Lithium Fluoride (LiF) Index of Refraction (n d ): 1.392 Surface Quality: 60-40 Abbe Number (v d ): 97.29 Axis Orientation: Random Wavelength Range (nm): 150 - 6000 Surface Flatness (P-V): 2λ @ 632.8nm Material Properties Density (g/cm 3 ): 2.64 Coefficient of Thermal Expansion CTE (10 -6 /°C): 37 Regulatory Compliance Certificate of Conformance: View ×