Sapphire Spherical Dome

A spherical dome is a spherical shell or enclosure designed to protect or cover an object. It is typically fabricated from transparent or semi-transparent materials such as glass, plastic, or other optically clear substances.

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As an optical component with distinctive properties, the sapphire spherical dome excels in optical performance. It offers exceptional optical transmittance across a broad spectral range—particularly in the visible and infrared bands—and maintains high uniformity across its entire spherical surface. This uniformity ensures consistent optical behavior at all points, effectively minimizing image distortion and other aberrations caused by localized variations in optical properties.

Mechanically, the sapphire dome exhibits extraordinary hardness—second only to diamond—conferring outstanding resistance to wear and scratching. Chemically, it demonstrates excellent stability and corrosion resistance, withstanding aggressive exposure to a wide variety of chemical agents. Thermally, it possesses superior thermal stability, remaining intact and dimensionally stable under significant temperature fluctuations without cracking or warping.

Moreover, sapphire lends itself well to precision fabrication. Advanced manufacturing techniques enable the production of highly accurate spherical geometries tailored to diverse optical system requirements. Its surface can also undergo fine polishing to further enhance both optical performance and surface quality.

 

Coating Anti-Reflection (AR) Coating
Diameter 6-120mm
Diameter Tolerance +/-0.1mm
Thickness Tolerance +/-0.1mm
Radius of Curvature Error ΔR/R ≈ ±0.39%
Surface Quality 40/20
Surface Figure λ/4 PV @ 633 nm
Edge Chamfer 0.2-0.3mm × 45°
Material Single-Crystal Sapphire

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