Corning® Calcium Fluoride (CaF2) - Code 9575 Fluoride Crystal Materials Physical and Chemical Properties Corning Specialty Materials is a premier supplier of fluoride crystal materials. With exceptional purity and quality, our crystal materials transmit at multiple wavelengths and can be used in a variety of applications. Corning also offers design engineering, fabricating, polishing and coating capabilities. With our capabilities to produce end-to-end optical solutions, let Corning be the supplier of choice for your most complex optical requirements. General Properties Corning / Specialty Materials /CTOL / CCaF2-9575 PM PI Sheet-CTOL001_A / Jul 2014 Molecular Weight Cubic, fluorite type, space group Fm3m, a0= 5.462 Angstroms, z = 4 Melting Point Boiling Point Calcium Fluoride is uniquely suited for demanding optical applications from deep ultraviolet through the infrared. Being physically stable and chemically inert with superior hardness, Calcium Fluoride is the material of choice for microlithography and laser optics applications. Single crystal ingots are grown using Corning’s proprietary highly purified material process, ensuring a consistent supply of high quality crystalline grades. A full range of geometries, from ingots to blanks, and finishes, including complex multi-faceted and highly polished parts, are available. Standard (111) orientation, as well as specifically oriented parts, are offered. Multiple material grades are available to match customer needs; Visible-Infrared, Ultraviolet, Excimer, Super Excimer, and Laser Durability. Low absorption coatings are customized to meet customer specifications, including coatings designed for enhanced laser durability in reflective, anti-reflective, and partially reflective applications. Mechanical and Elastic Properties Young’s Modulus (E) Elastic Compliance Elastic Stiffness Dielectric Constant Poisson Ratio 158.3 Knoop for both [100] and [110] directions

Thermal Properties Non-linear (2-photon) absorption coefficient: Debye Temperature Thermal Conductivity Refractive Index of CaF2 in Nitrogen Gas (1013.25 hPa) Symbol of Spectral line Refractive Index Refractive Index Refractive Index Refractive Index Linear Thermal Expansion Coefficient T [°C] Refractive index Optical Properties Transmission Range 0.12 μm to beyond 7.5 μm, depending on thickness Restrahl Frequency Reciprocal Dispersive Power In the visible region the piezo coefficients are: 10-12 Pa q11 = -0.038 q12 = 1.08 (q11-q12) = -1.46 q44 = 0.71 At 10.6 μm (q11-q12) = -0.513 Optic Modes...

Available Grades and Additional Information Sellmeier Dispersion Coefficients (25 °C) A1 Temperature Coefficients of Refractive Index of CaF2 Corning® Calcium Fluoride Material is Classified in the Following General Grades: • • • • • Laser Durability Super-Excimer Excimer Ultraviolet Visible-Infrared 193 nm recommended for ArF 193 nm recommended for ArF 193 nm recommended for KrF and ArF 200 nm – 400 nm 400 nm – 10.6 μm Corning’s crystal experts work actively with prospective customers to determine the most appropriate and cost effective solution for each application. Depending on the application...