Sapphire Optical Lens – High Hardness, Multi-Size Customization
Sapphire optical lenses represent the gold standard in high-performance optics, combining unmatched durability with exceptional optical clarity. Engineered from 99.999% pure single-crystal aluminum oxide (Al₂O₃), these lenses offer Mohs 9 hardness (second only to diamond) while maintaining >85% light transmission from UV to mid-IR wavelengths (250-5000nm). Unlike conventional glass or fused silica optics, sapphire lenses are virtually scratch-proof, chemically inert, and capable of withstanding extreme temperatures (-200°C to +1900°C) – making them indispensable for aerospace, defense, industrial laser, and scientific instrumentation applications.
Our precision manufacturing process combines diamond-tool CNC machining with sub-nanometer polishing to produce lenses with:
- Surface roughness <5Å RMS (near-atomic smoothness)
- Wavefront distortion <λ/10 @ 632.8nm
- Centration accuracy <1 arc minute
Available in diameters from 1mm to 300mm with customizable curvatures (plano, spherical, aspheric), these lenses push the boundaries of what's possible in harsh-environment optical systems.
Key Features of Sapphire Lens
1. Sapphire Lens provide Extreme Environmental Resistance
- Thermal shock stability (ΔT >1000°C)
- Radiation hard (withstands >10⁶ Gy gamma)
- Impervious to acids/alkalis (except HF)
2. Sapphire Lens provide Optical Performance
- Broadband AR coating options (Ravg <0.2% per surface)
- Low birefringence (<5 nm/cm)
- Homogeneity Δn <5×10⁻⁶
3. Sapphire Lens provide Mechanical Superiority
- Knoop hardness 2000 kg/mm²
- Compressive strength 2.1 GPa
- Density 3.98 g/cm³
4. Sapphire Lens provide Precision Manufacturing
- Diameter tolerance ±0.005mm
- Center thickness ±0.01mm
- Surface irregularity <0.1μm
Applications of Sapphire Lens
1. Sapphire Lens in Defense & Aerospace
- Laser weapon system optics
- Missile seeker domes
- Spacecraft star trackers
2. Sapphire Lens in Industrial Lasers
- High-power CO₂ laser focusing lenses
- Fiber laser collimators
- Laser cutting beam delivery
3. Sapphire Lens in Scientific Instruments
- Raman spectroscopy objectives
- Synchrotron beamline optics
- Cryogenic microscope lenses
4. Sapphire Lens in Medical Technology
- Laser surgery handpieces
- Endoscope imaging optics
- Ophthalmic diagnostic devices
Specifications
| Parameter | Specification |
| Material | Single-crystal sapphire (C-axis) |
| Purity | 99.999% (5N) Al₂O₃ |
| Transmission Range | 250nm - 5000nm |
| Refractive Index | 1.76 @ 587.6nm |
| Surface Accuracy | λ/10 @ 632.8nm |
| Scratch-Dig | 10-5 per MIL-PRF-13830B |
| CTE | 5.3×10⁻⁶/K (∥ to C-axis) |
| Thermal Conductivity | 35 W/(m·K) @ 25°C |
| Young's Modulus | 345 GPa |
Standard Sizes:
- Diameter: 3mm, 5mm, 10mm, 25mm, 50mm, 100mm
- Radius Options: Plano, R5mm to R5000mm
- Thickness: 0.5mm to 50mm
Coating Options:
- UV-AR: 250-400nm (R<0.5%)
- VIS-AR: 400-700nm (R<0.2%)
- NIR-AR: 700-1100nm (R<0.3%)
- MWIR-AR: 3-5μm (R<1.0%)
Factory Equipments
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Sapphire Optical Lens High Resolution Hardness Multi-Size Customization Images
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