Sapphire is a single crystal of alumina, also known as corundum. As an important technical crystal, sapphire has been widely used in many fields of science and technology, national defense and civil industry. Sapphire glass has very good thermal characteristics, excellent electrical and dielectric properties, and chemical corrosion resistance, it is high temperature resistance, good thermal conductivity, high hardness, infrared penetration, good chemical stability. Therefore, it is commonly used to replace other optical materials to make infrared optical Windows, and is widely used in infrared and far-infrared military equipment, such as: It is used in night vision infrared and far infrared scopes, night vision cameras and other instruments and satellites, space technology instruments and instruments, as well as the window of high power laser, optical window, UV and IR window and observation port of low temperature experiment, and has been fully applied in high precision instruments and meters for navigation, aerospace and aviation.- Sapphire wafer is widely used in optical equipment, electronic manufacturing, medical equipment, communication equipment and other industries. - Can be used in demanding applications such as optical Windows, laser systems, high-precision sensors, touch panels, etc.- High-quality materials: The use of high-quality sapphire raw materials to ensure the stability and durability of the product. - Precision manufacturing: After precision machining and grinding, to ensure the precision and finish of the disc. - Excellent performance: Excellent optical transmittance, high temperature resistance, chemical inertness and other characteristics.

Material	Sapphire single crystal lens
Contour tolerance	+/-0.03mm
Thickness Tolerance	±0.005mm
Transmitted wavefront distortion	≤1/8λ，@632.8 nm
TTV	≤1'
S/D	5/10；20/10；40/20，60/40
Effective aperture	>90%
Coating	AR/AF/IR