sapphire substrates lens

sapphire substrates lensCrystal materials: 99,996% of Al2O3, High Purity, Monocrystalline;Crystal quality: Block marks, twins, Color, micro-bubbles and dispersal centers are non-existent;Diameter: 2inch-6inchSapphire lenses are custom fabricated in sizes ranging from 1/4 in.sq. up to 4 in. dia with ±0.001 in. tolerances in plano-convex, -concave, meniscus, and dome configurations. Suited for use as protective lenses for night vision systems, cameras, telescopes, and sensors, sapphire exhibits Moh 9 hardness which is second only to diamond (Moh 10) and is highly resistant to chemicals, abrasion, and extreme temperatures to 1,000°C. Featuring surface finishes to 40-20 scratch-dig, depending upon size and configuration, lenses can incorporate focal lengths from 3/4 in. to 1000 mm and greater.