Laboratory Grade Sapphire Glass for Scientific Instruments and Precision Optics
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| Customization: | Available |
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| After-sales Service: | Yes |
| Warranty: | Yes |
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Basic Info.
- Model NO.
- 1-1000mm
- Material
- Glass
- Shape
- Ball
- Application
- Medical, Civil, Labs
- Usage
- Medical, Optical
- Type
- Flat Lens
- Transmittance
- >95%
- Lenses Color
- Clear
- Certification
- RoHS, ISO9001
- Customized
- Customized
- Coating
- UV
- Hardness
- Mohs Hardness of 9
- Material Type
- Synthetic Sapphire Glass
- Density
- 3.98 G/Cm³
- Refractive Index
- 1.761.77 (@589nm)
- Polishing Grade
- Optical (Ra<5nm)/Commercial (Ra<20nm)
- Transport Package
- Factory-Sealed
- Specification
- 1-1000mm
- Trademark
- Yuanshi Technology Co., Ltd., Heyuan
- Origin
- Heyuan
- Production Capacity
- 1000000/Year
Packaging & Delivery
- Package Size
- 20.00cm * 20.00cm * 20.00cm
- Package Gross Weight
- 1.000kg
Product Description
Parameter Category | Parameter Name | Value / Description / Typical Value | Test Conditions / Notes |
Basic Information | Product Name | Sapphire Glass Optical Window | |
Material Composition | Single Crystal α-Aluminium Oxide ( | ||
Crystal Structure | Hexagonal Crystal System | Anisotropic Crystal | |
Growth Method | Kyropoulos Method, Heat Exchanger Method (HEM), Edge-defined Film-fed Growth (EFG) | ||
Product Form | Flat, Spherical, Aspheric (Customizable) | Can be customized to requirements | |
Physical Properties | Density | 3.97 - 3.99 g/cm³ | |
Mohs Hardness | 9 | Second only to diamond (10) | |
Knoop Hardness | ~2000 kg/mm² | Load 100g | |
Young's Modulus | 345 GPa | ||
Shear Modulus | 145 GPa | ||
Poisson's Ratio | 0.25 - 0.27 | ||
Compressive Strength | >2.0 GPa | ||
Flexural Strength | > 690 MPa | Highly dependent on surface finish quality | |
Thermal Properties | Melting Point | 2040 °C | |
Maximum Operating Temperature | 1900 °C (Vacuum/Inert Gas) / ~1000°C (Air) | High temps in air may cause surface devitrification | |
Coefficient of Thermal Expansion (CTE) | @ 25°C | ||
Thermal Conductivity | 25 - 35 W/(m·K) | @ 20°C, ~30x higher than ordinary glass | |
Specific Heat Capacity | 750 J/(kg·K) | @ 25°C | |
Optical Properties | Crystal Type | Uniaxial Negative Crystal | |
Refractive Index (@587.6 nm) | no = 1.768 / ne = 1.760 | ||
Abbe Number | 72.2 (based on no) | Low dispersion | |
Transmission Range | 0.15 μm - 5.5 μm | Deep UV to Mid-IR | |
Internal Transmittance | >85% @ 0.3μm (1mm thick) / >80% @ 4μm (1mm thick) | Depends on thickness and coating | |
Refractive Index Homogeneity | |||
Birefringence | 0.008 | Crystal orientation must be considered | |
Surface Specifications | Diameter/Size Tolerance | ±0.02 mm or customized | |
Thickness Tolerance | ±0.01 mm or customized | ||
Parallelism | < 3 arcsec (High Precision) / < 1 arcmin (Standard) | ||
Flatness | λ/10 @ 632.8nm / λ/4 (Standard) | MIL-O-13830 | |
Surface Finish (Quality) | 10-5 Scratch-Dig (Standard) / Up to 20-10 (High Grade) | MIL-PRF-13830B | |
Clear Aperture | > 90% | ||
Bevel | < 0.1mm x 45° (Protective bevel) | ||
Chemical & Electrical Properties | Chemical Stability | Excellent. Insoluble in water, resistant to strong acids (e.g., HCl, HNO) and strong bases (slight corrosion at high temps). Not resistant to (HF) and hot Phosphoric Acid. | |
Water Resistance | Class 1 | ISO 719 | |
Dielectric Constant (@1 MHz) | |||
Volume Resistivity | @ 25°C | ||
Dielectric Strength | 480 kV/cm | ||
Coating Options | Anti-Reflection (AR) Coating | Reduces reflection losses, increases transmission in specific bands (e.g., NIR, VIS, specific laser wavelength) | Single side R<0.25% @ specified wavelength |
High Reflection (HR) Coating | Achieves high reflectivity at specific wavelengths (e.g., for laser cavities) | R>99.5% @ specified wavelength | |
Oleophobic/ Hydrophobic Coating | Anti-fingerprint, easy to clean, surface protection | Water Contact Angle > 110° | |
Conductive Coating (e.g., ITO) | Provides transparent conductivity or electromagnetic shielding | Sheet resistance customizable | |
Protective Coating | Provides extra protection against specific chemical environments | ||
Application Fields | High-End Consumer Electronics: Smartphone camera covers, smartwatch crystals, fingerprint sensor covers. Industrial & Research: High-power laser windows, vacuum viewports, high-pressure/high-temperature viewports, spectrometer components. Aerospace & Defense: Missile domes, EO/IR pod windows, periscopes, armored vehicle viewports. Medical Devices: Endoscope protection lenses, surgical device windows, biosensors. Semiconductor Industry: Viewports for wafer processing equipment. |
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