Nanjing Crylink Photonics Co.,Ltd
Growing crystal, Lingling Value.
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Sapphire crystals Windows
Sapphire optical crystal is an excellent material used in application which required broad spectral ranges and high durability. Sapphire transmits light over a broad wavelength range spanning from 0.15um to 5um, it also has high-temperature resistance up to 2000 ℃, good thermal conductivity, high hardness (Morse 9th) and good chemical stability. Usually Sapphire crystal used in FTIR spectroscopy, FLIR imaging and crystal substrate. especially for blue, purple, white light-emitting diodes (LED) and blue light laser (LD)
Features
Application
Chemical and Phisical Properties
| Property | Value |
| Chemical formula | Al2O3 |
| Crystal structure | Hexagonal |
| Density | 6.73g/cm3 |
| Melting Point | 2040°C |
| Refractive Index | n=1.84 @550 nm |
| n=1.623 @500 nm | |
| Transmission band (μm) | 0.15-6 |
| Surface flatness | <λ/8@632nm |
| Clear aperture | >90% |
| Orentation tolerance | <0.5° |
| Parallel | 10” |
| Perpendicular | 5’ |
| Surface quality | 10/5 (Scratch/Dig) |
| Chamfer | <0.2×45° |
| Wavefront distorsion | <λ/8@632 nm |