Sapphire is slightly birefringent. The high-hardness Sapphire Crystal has a refractive index of 1.75 and grows to a random orientation, so the universal infrared window is usually cut in a random manner. For specific applications with birefringence problems, the selection directions are: C-plane, A-plane and R-plane.
Zoolied Inc. offers in a variety of Sapphire Optics , such as Optical Sapphire rings, Step Glass, Sapphire Rod Lens and sapphire tubes. Multiple anti-reflection coating options are available for the Ultraviolet (UV), visible, or Infrared (IR).
Looking for ideal optical sapphire Manufacturer & supplier? We have a wide selection at great prices to help you get creative. All the Sapphire Glass are quality guaranteed. Zoolied China Origin Factory of Sapphire Optics. If you have any question, please feel free to contact us.
Note: Please pay attention to your email at any time after inquiring, we will send you the quotation by email.
Do you want to know more about Sapphire? What is Sapphire material? Now, please check the following information:
| Sapphire (Al2O3) | |
| Abbe Number (vd): | 72.24 |
| Axis Orientation: | Random |
| Birefringence (no-ne): |
0.008 for Visible Light Orthogonal to Optical Axis |
| Clear Aperture : | ≥90% |
| Coating: | Uncoated or spesified by customers |
| Coefficient of Thermal Expansion CTE : | 8.8(10-6/°C) |
| Density : | 3.97g/cm3 |
| Index of Refraction nd: | 1.77 |
| Parallelism : | ≤5min |
| Poisson's Ratio: | 0.271 |
| Surface Flatness: | 2λ (typical) |
| Surface Quality: | 80-50 |
| Wavelength Range : | 0.2 - 5.5μm |
| Wavelength Range: | 330 - 5500nm |
| Young's Modulus : | 435GPa |
| Knoop Hardness : | 1900GPa |
Sapphire is a single crystal form of Al2O3, with a favorable combination of chemical, mechanical and optical properties. Sapphire is resistant to attack by strong acids, enabling use in a corrosive atmosphere. It is resistant to scratch and abrasion with very high Knoop hardness of 1800 parallel to the optic axis (C-axis), 2200 perpendicular to the optic axis.
Sapphire's hardness allows it to be made into much thinner optics than other substrates. Sapphire is chemically inert and insoluble to water, common acids, and alkalis for temperatures up to 1,000 °C. Sapphire is transparent in the UV to the IR (150?nm - 4.5μm). It is commonly used in IR laser systems and has an ordinary refractive index of 1.754 and an extraordinary refractive index of 1.747 at 1.064 μm.
Features Extreme Surface Hardness Chemical Resistance
Transmits Wavelengths Ranging From UV to Mid-Infrared
Thinner and Stronger than Standard Glass Windows
Improved Transmission Values in the Visible and Near Infrared Spectra
Besides uncoated Sapphire Windows. Zoolied offers coating options for 400 - 5000nm according different applications:
| Zoolied Standard Optical Uncoated and Coated Sapphire Windows And Wafers | |
| D2.5*0.5 Uncoated Sapphire Wafers | D35*1mm Uncoated Sapphire Windows |
| D5*1mm Uncoated Sapphire Windows | D38.1*1mm Uncoated Sapphire Windows |
| D6.35*0.5mm Uncoated Sapphire Windows | D40*2mm Uncoated Sapphire Windows |
| D7.5*0.4mm Uncoated Sapphire Wafers | D63.5*2mm Uncoated Sapphire Windows |
| D9.5*0.5mm Uncoated Sapphire Wafers | D50.8*3.18mm Uncoated Sapphire Windows |
| D10*1mm Uncoated Sapphire Windows | D75*2mm Uncoated Sapphire Windows |
| D12.5*1mm Uncoated Sapphire Windows | D10*1mm NIR Coating@750-1550nm Sapphire Windows |
| 12.5*12.5*1mm Uncoated Sapphire Windows | D12.5*1mm VIS-NIR Coating@400-1000nm Sapphire Windows |
| D13*0.5mm Uncoated Sapphire Windows | D12.7*1mm BBAR Coating@1650-3000nm Sapphire Windows |
| D15*2mm Uncoated Sapphire Windows | D15*2mm BBAR Coating@2-5μm Sapphire Windows |
| D20*2mm Uncoated Sapphire Windows | D38.1*1mm BBAR Coating@2-5μm Sapphire Windows |
| D22*2mm Uncoated Sapphire Windows | 12.5*12.5*1mm Uncoated Sapphire Windows |
| D23.75*1mm Uncoated Sapphire Windows | D6.35*0.5mm NIR Coating@600-1050nm Sapphire Windows |
| 25.4*25.4*1 Uncoated Sapphire Windows | 25.4*25.4*1mm MgF2 AR Coating@400-700nm Sapphire Windows |
| D25*2.3mm Uncoated Sapphire Windows | D25*2.3mm BBAR Coating@2-5μm Sapphire Windows |
| D30*1mm Uncoated Sapphire Windows | D12.7*1mm BBAR Coating@2-5μm Sapphire Windows |
