Sapphire Custom-Shaped Windows Optical Glass Multi-Form
Customization Transmittance >85%
The sapphire custom-shaped window is a non-standard optical
component precision-engineered from single-crystal aluminum oxide
(α-Al₂O₃), specifically designed for specialized optical systems.
Unlike conventional circular or square windows, it can be
customized into complex geometries (polygonal, annular, D-shaped,
etc.) while retaining sapphire's intrinsic properties - ultra-high
hardness (Mohs 9) and broad-spectrum transmittance (250-5500nm).
This unique design flexibility makes it an ideal solution for
space-constrained, specialized optical path, or non-standard
interface requirements, extensively applied in high-end laser
systems, military electro-optics, and precision instrumentation.
Key Characteristics
· Complex Geometry Adaptability: Supports CNC-machined irregular contours (hexagonal, trapezoidal,
sector-shaped, etc.) with edge tolerance controlled within ±0.02mm,
ensuring perfect compatibility with non-standard optical chambers
or device interfaces.
· Extreme Environmental Stability: Inherits sapphire's superior properties, withstanding high
temperatures (800°C continuous/1800°C short-term), resisting
acid/alkali corrosion (pH1-13), and maintaining optical stability
under intense impact or particle erosion.
· Exceptional Optical Performance: Achieves >85% transmittance from UV to mid-IR, with optional
anti-reflective coatings (<0.5% reflectivity at specific
wavelengths like 1064nm/10.6μm) to minimize laser system energy
loss.
· Outstanding Mechanical Strength: Flexural strength >600MPa allows processing ultra-thin
structures (down to 0.2mm) without fracture, suitable for
miniaturized optical modules.
Technical Parameters
| Parameter | Specification |
| Material Purity | ≥99.99% α-Al₂O₃ single crystal |
| Density | 3.98 g/cm³ |
| Hardness | Mohs 9 / Knoop 2200 kgf/mm² |
| Wavelength Range | 250-5500 nm |
| Transmittance | >85% (Visible-NIR), >80% (UV-MIR) |
| Temperature Range | Continuous: 800°C, Short-term: 1800°C |
| Available Shapes | Polygonal, Annular, D-shaped, Sector, etc. |
| Thickness Range | 0.2-20 mm (±0.01 mm tolerance) |
| Surface Roughness | Ra ≤5 nm (polished) |
Primary Applications
1. Special Laser Optical Systems: Serves as side-pump windows for
fiber lasers or protective windows for ultrafast laser deflectors,
precisely adapting to complex optical paths.
2. Defense & Aerospace: Used in missile seeker irregular radomes
and asymmetric observation windows for airborne EO pods, balancing
aerodynamic profiles with impact resistance.
3. Semiconductor Equipment: Functions as shaped viewports for
etching machines and thin-film deposition systems, resisting plasma
corrosion while providing distortion-free observation.
4. Medical & Scientific Instruments: Optimizes space utilization
and optical efficiency in endoscopic articulating lenses and
synchrotron radiation beamline deflectors.
