Large Size Sapphire Optical Windows for Extreme Environment Applications
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Large Size Sapphire Optical Windows for Extreme Environment Applications
Large Size Sapphire Optical Windows for Extreme Environment ApplicationsOur large-size sapphire optical windows are manufactured from high-purity single-crystal aluminum oxide (Al₂O₃) using advanced crystal growth technology. With boule weights reaching up to 1000 kg and finished optical windows available in diameters up to 680 mm, these sapphire components provide exceptional optical performance and mechanical reliability for demanding environments.
Combining outstanding optical transmission, extreme hardness, high-temperature resistance, and excellent chemical stability, sapphire windows are widely used in underwater observation systems, aerospace equipment, laser systems, semiconductor equipment, and high-pressure industrial inspection applications.
Key Features
- High optical transmission from 400 nm to 4000 nm
- Mohs hardness of 9, second only to diamond
- Excellent scratch and abrasion resistance
- High mechanical strength and impact resistance
- Operating temperatures up to 2000°C
- Outstanding resistance to acids, alkalis, and corrosive chemicals
- Excellent thermal stability and thermal shock resistance
- Available in custom circular, rectangular, and special-shaped designs
- Ultra-large dimensions available for demanding optical systems
Material Properties
| Property | Value |
|---|---|
| Material | Single Crystal Al₂O₃ |
| Purity | >99.996% |
| Density | 3.98 g/cm³ |
| Mohs Hardness | 9 |
| Vickers Hardness | 16–20 GPa |
| Young's Modulus | >420 GPa |
| Bending Strength | >350 MPa |
| Melting Point | 2050°C |
| Refractive Index | 1.762–1.770 |
| Thermal Conductivity | 46.06 W/(m·K) @ 0°C |
| Optical Transmission | ≥85% (400–4000 nm) |
| Optical Uniformity | Δn ≤ 4×10⁻⁵ |
Available Size Capability
| Sapphire Boule Weight | Max Boule Diameter | Max Boule Height | Max Circular Window | Max Rectangular Window |
|---|---|---|---|---|
| 160 kg | 420 mm | 360 mm | Ø360 mm | 340 × 280 mm |
| 400 kg | 560 mm | 530 mm | Ø505 mm | 500 × 360 mm |
| 800 kg | 690 mm | 750 mm | Ø650 mm | 700 × 450 mm |
| 1000 kg | 740 mm | 810 mm | Ø680 mm | 750 × 500 mm |
Typical Applications
Deep-Sea Observation Systems
Large sapphire windows provide excellent transparency and pressure resistance for underwater cameras, submarines, and oceanographic research equipment.
Aerospace and Defense
Used in aircraft sensors, missile guidance systems, infrared imaging devices, and protective optical domes.
High-Power Laser Systems
Ideal for laser protection windows and optical transmission components due to their high damage threshold and thermal stability.
Industrial Inspection Equipment
Applied in harsh industrial environments where optical clarity, wear resistance, and chemical durability are essential.
Scientific Research Instruments
Suitable for spectroscopy, vacuum chambers, plasma diagnostics, and high-temperature observation ports.
Custom Manufacturing Services
We provide customized sapphire windows according to customer requirements:
- Diameter up to Ø680 mm
- Rectangular size up to 750 × 500 mm
- Custom thicknesses
- Optical polishing on one or both sides
- AR, IR, UV, and dielectric coatings
- Precision edge finishing and mounting features
- Prototype and volume production available
FAQ
1. What is the maximum size of sapphire window you can manufacture?
We can produce circular sapphire windows up to 680 mm in diameter and rectangular windows up to 750 × 500 mm based on our 1000 kg sapphire boule growth capability.
2. Can sapphire windows withstand extreme temperatures?
Yes. Sapphire has a melting point of approximately 2050°C and maintains excellent mechanical and optical performance under high-temperature conditions.
3. Are custom dimensions and coatings available?
Yes. We offer custom sizes, thicknesses, surface finishes, edge profiles, and optical coatings to meet specific application requirements.
Related Product
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.