Leading Manufacturer for Precision Glass Machining - Sapphire Optical Windows – LZY
Leading Manufacturer for Precision Glass Machining - Sapphire Optical Windows – LZY Detail:
Uncoated sapphire has excellent surface hardness, and the range of transmittance extends from ultraviolet to mid-infrared wavelength region. Sapphire can only be scratched by a few substances other than it. The uncoated substrate is chemically inert and insoluble in water, common acids or alkalis at temperatures up to about 1000°C. Our sapphire window is a z-axis section, so the c-axis of the crystal is parallel to the optical axis, eliminating the birefringence effect of transmitted light.
Specification
Dimension Tolerance: 0.0/-0.1mm
Thickness Tolerance: ±0.1mm
Clear Aperture: ≥90%
Surface Quality: 40/20(Dimension≤50.8mm) 60/40(Dimension＞50.8mm)
Flatness: λ/4@633nm
Parallelism: ≤1′
Chamfer: 0.2×45°
Sapphire Protective Windows
Shape Forming Method
CNC or laser
Product Characteristics
Material Properties
Sapphire is a single crystal aluminum oxide (Al2O3). It is one of the hardest materials. Sapphire has good transmission characteristics over the visible, and near IR spectrum. It exhibits high mechanical strength, chemical resistance, thermal conductivity and thermal stability. It is often used as window materials in specific field such as space technology where scratch or high temperature resistance is required.
| Molecular Formula | Al2O3 |
| Density | 3.95-4.1 g/cm3 |
| Crystal Structure | Hexagonal Lattice |
| Crystal Structure | a =4.758Å , c =12.991Å |
| Number of molecules in unit cell | 2 |
| Mohs Hardness | 9 |
| Melting point | 2050 ℃ |
| Boiling Point | 3500 ℃ |
| Thermal Expansion | 5.8×10-6 /K |
| Specific Heat | 0.418 W.s/g/k |
| Thermal Conductivity | 25.12 W/m/k (@ 100℃) |
| Refractive Index | no =1.768 ne =1.760 |
| dn/dt | 13×10 -6 /K(@633nm) |
| Transmittance | T≈80% (0.3～5μm) |
| Dielectric Constant | 11.5(∥c), 9.3(⊥c) |
Transmission Curve of Sapphire Optical Window
Product detail pictures:
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Our progress depends about the advanced products ,fantastic talents and continuously strengthened technology forces for Leading Manufacturer for Precision Glass Machining - Sapphire Optical Windows – LZY , The product will supply to all over the world, such as: Rome, Poland, Belgium, The company has perfect management system and after-sales service system. We devote ourselves to building a pioneer in the filter industry. Our factory is willing to cooperate with different customers domestic and overseas to gain better and better future.
By Diana from Birmingham - 2017.10.25 15:53
The customer service staff is very patient and has a positive and progressive attitude to our interest, so that we can have a comprehensive understanding of the product and finally we reached an agreement, thanks!
By Fiona from Finland - 2018.12.25 12:43
