Custom High Purity Fused Silica Quartz Glass Optical Windows for Electronic Instruments
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| Customization: | Available |
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| After-sales Service: | Yes |
| Warranty: | Yes |
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Basic Info.
- Model NO.
- custom
- Type
- Rectangular Prism
- Usage
- Beam Dispersion, Beam Split
- Shape
- Cube Corner Prism
- Material
- Glass
- Application
- Medical Instrument
- Customized
- Customized
- Transmittance
- >95%
- Lenses Color
- Clear
- Certification
- RoHS, ISO9001
- 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
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. |
Certifications
FAQ
1. Q: "Sapphire glass? Is it made from real sapphire? Does that make it very expensive?"
A: "That's an excellent question. Sapphire glass is not made from natural gemstone sapphires. It is a synthetic sapphire crystal. It's created by crystallizing aluminum oxide at high temperatures, resulting in a manmade material with identical physical properties to natural sapphire. It's called 'sapphire glass' due to its exceptional hardness and clarity. Regarding cost, the complex manufacturing process does make it more expensive than standard or mineral glass. However, it represents a valuable investment due to its unparalleled scratch resistance and durability, ultimately saving cost and hassle from frequent replacements in the long run."
A: "That's an excellent question. Sapphire glass is not made from natural gemstone sapphires. It is a synthetic sapphire crystal. It's created by crystallizing aluminum oxide at high temperatures, resulting in a manmade material with identical physical properties to natural sapphire. It's called 'sapphire glass' due to its exceptional hardness and clarity. Regarding cost, the complex manufacturing process does make it more expensive than standard or mineral glass. However, it represents a valuable investment due to its unparalleled scratch resistance and durability, ultimately saving cost and hassle from frequent replacements in the long run."
2. Q: "What is the primary advantage of sapphire glass?"
A: "Its core advantage is an exceptional Mohs hardness rating of 9, second only to diamond (10). This means it's highly resistant to scratches from everyday materials like keys, knives, or sand. Your watch crystal or lens cover will maintain a pristine, likenew clarity. Additionally, it offers excellent optical transmittance and strong antireflective properties (especially with coating), ensuring perfect readability or visibility in any lighting condition."
3. Q: "If it's so hard, does that mean it's shatterproof and impactresistant?"
A: "You've touched on a crucial distinction. It's important to clarify: High Hardness ≠ High Impact Resistance. Due to its extreme hardness, sapphire glass can be more brittle. When subjected to sharp, concentrated point impacts, it may be more susceptible to cracking, shattering, or chipping compared to more ductile materials like mineral glass or plastic. Its specialty is scratch prevention, not drop protection. Many highend manufacturers improve impact resistance through structural design (like domed shapes) and increased thickness, but avoiding severe impacts is still recommended."
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