Sapphire Optical Window
High-purity sapphire single crystal offers high transmittance across a broad spectral range from ultraviolet to mid-infrared, along with good mechanical strength and chemical stability. It maintains stable optical performance under high pressure, high temperature, and corrosive environments, making it widely used in laser systems, infrared detection, industrial sensors, and high-temperature viewing windows.
Technical data
| Outside diameter: | 0.40–300 mm | Height: | 0.05–200 mm |
| Surfaceness: | S/D: 10/5 20/10 40/20 60/40 | Flatness: | λ/4 |
Features & Benefits
High Hardness
Mohs 9 resists scratching from sand, dust, and metal debris, maintaining surface finish and transmittance even after long-term exposure.
Broad-Band Transmission
Uncoated transmission from 200 to 5500 nm (UV–Vis–MIR), suitable for multi-spectral systems and IR detection.
Good Chemical Resistance
Inert to most acids, alkalis, and organic solvents (except HF), remaining stable in corrosive atmospheres and cleaning processes.
Thermal and Dimensional Stability
Melting point of approximately 2,040℃ with a low coefficient of thermal expansion, showing minimal change in flatness and parallelism under thermal cycling or vacuum conditions.
Flexible Geometry and Coating Options
Round, square, custom-shaped, stepped, and metallized versions are available, with optional AR and beam-splitting coatings to match optical design requirements.