Sapphire Custom-Shaped Windows – Optical Glass, High Hardness
In the realm of high-performance optical components, sapphire
custom-shaped windows stand as the pinnacle of material
engineering. Crafted from 99.999% pure single-crystal aluminum
oxide (Al₂O₃), these precision optical elements combine unmatched
hardness (Mohs 9) with exceptional optical clarity to meet the most
demanding industrial, scientific, and defense applications. Unlike
conventional optical glass, sapphire windows offer 3-5x greater
scratch resistance, superior thermal stability (melting point
2,050°C), and outstanding chemical inertness – making them
indispensable where reliability under extreme conditions is
non-negotiable.
Our proprietary diamond-tool CNC machining and atomic-layer
polishing processes enable the production of complex custom
geometries – from ultra-thin disks to intricate polygonal shapes –
with sub-micron tolerances and surface roughness <5Å. Whether
for laser systems operating at megawatt power levels or spacecraft
viewports facing micrometeoroid impacts, these sapphire windows
deliver uncompromising performance across the electromagnetic
spectrum (UV to mid-IR).
Key Features of Sapphire Optical Window
1. Sapphire Window's Extreme Durability
- Mohs 9 hardness – Only diamond can scratch it
- Flexural strength >800 MPa – Withstands high-pressure
differentials
- Fracture toughness 2.5 MPa·m½ – 3x more impact-resistant than fused
silica
2. Sapphire Window's Optical Excellence
- Broadband transmission (85%+ from 250nm to 5,000nm)
- Low autofluorescence – Critical for Raman spectroscopy
- Refractive index homogeneity <5 × 10⁻⁶ across entire surface
3. Sapphire Window's Precision Engineering
- Dimensional tolerances to ±0.001mm
- Surface flatness λ/10 at 632.8nm
- Parallelism <1 arc minute
4. Sapphire Window's Environmental Resistance
- Thermal shock resistant (ΔT >1,000°C)
- Radiation hard (withstands >10⁶ Gy)
- Impervious to all acids except hydrofluoric
5. Sapphire Window's Customization Capabilities
- Complex geometries: Hexagons, D-shapes, trapezoids, free-form
- Edge treatments: Beveled, rounded, or precision-ground
- Coatings: AR coating,High Transmission Coatings,Reflective
Coatings,Hard Coating,Anti-Soiling Coatings,Anti-Glare
Coatings,Filter Coatings
Specifications
| Property | Value |
|---|
| Material | Single-Crystal Sapphire (Al₂O₃) |
| Crystal Orientation | C-plane (0001) standard |
| Purity | ≥ 99.995% |
| Hardness | Mohs 9 (second only to diamond) |
| Density | 3.98 g/cm³ |
| Melting Point | ~2040 °C |
| Young’s Modulus | 400 GPa |
| Thermal Conductivity | 35–46 W/(m·K) |
| Refractive Index (n) | ~1.76 @ 1 µm |
Factory Equipments
