Union Optic-optical material
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Optical Element—Material Overview^ Optical Material Material Overview Union Optic can supply many optical materials, like colorless optical glasses, color glasses, infrared materials, UV materials and also optical crystals. Usually, the material we used is Chinese material unless specified. If you can not confirm which material is the right one, please contact us. All the material we provided are RoHS Compliant! Refractive Index Transmission Thermal Expansion 3 Range(um) Coefficient (10*/K) Density(g/cm ) Fused Silica Crystal Quartz

JGS3 is transparent in the ultraviolet, visible and infrared spectral regions, but it has many bubbles inside. It is equivalent to Suprasil 300. Full Spectrum Fused Silica (JGS3) • Thermal Expansion Coefficient: 18.85x10 7K (20°C to 60°C)

Optical Element—MgF^AIA/Si MgF2is a tetragonal positive birefringent crystal. MgF2 has good chemical, mechanical and thermal characteristics compared with CaF2. Due to its high vacuum UV transmission and high damage threshold, MgF2 is usually used in VUV and excimer laser windows, polarizers, lenses and etc. Sapphire is a single crystal aluminum oxide (Al203). Its Mohs hardness is 9, it is one of the hardest materials. Sapphire has good mechanical strength, and it is also transparent from visible to IR spectrum. So, it is always used as window material where scratch resistance is required....

Optical Element—Germanium/ZnSe Germanium is widely used in far infrared wavelength, it is transparent from 2 micron to 17 micron. Germanium also has higher refractive index about 4 at 10.6 micron. Germanium is very popular in FLIR • Thermal Expansion Coefficient: 5.5x10"6/K