Sapphire windows stand out as high-end options in optical windows, thanks to their exceptional comprehensive performance: they boast broad spectral transmittance (covering visible to near-infrared bands), excellent mechanical strength and ultra-high surface hardness (second only to diamond), and superior high-temperature tolerance that enables stable operation even in extreme high-temperature environments.

Material | Sapphire |
Dimensional tolerances | +/-0.05, +/-0.1mm |
Surface Flatness | λ/10~1λ |
Parallelism | < 30 arc seconds |
Surface Quality | 10/5,20/10,40/20 |
Edge Chip | <0.1mm |
Bevel | Protective bevel, or based on clients’ requests |
Clear Aperture | >90% |
Coating | According to customer's request |
As a high-end product in the optical window category, sapphire windows are highly recognized in the global market for their exceptional comprehensive performance. They feature broad spectral transmittance, covering the visible to near-infrared bands, which ensures clear and stable light transmission for various optical systems. With ultra-high surface hardness (second only to diamond) and excellent mechanical strength, they offer superior wear resistance and impact resistance. Additionally, sapphire windows boast outstanding high-temperature tolerance, maintaining stable performance even in extreme high-temperature working environments. Their strong chemical inertness enables excellent resistance to most acids, alkalis, and harsh industrial chemicals, while high thermal conductivity, high dielectric constant, and superior structural stability minimize deformation and extend service life—effectively reducing your maintenance costs and enhancing product reliability. These core advantages make them the preferred choice for high-precision applications such as medical endoscopes, industrial lasers, aerospace optical systems, and harsh-environment detection equipment, outperforming ordinary optical windows in both performance and durability.
Sapphire is inherently endowed with four key advantages: high surface hardness, high thermal conductivity, high dielectric constant, and excellent resistance to chemical acids and alkalis. Leveraging its hardness (second only to diamond) and exceptional structural strength, our sapphire windows—manufactured with advanced light transmittance enhancement technology—are thinner than conventional high-dielectric windows. This slim design not only simplifies integration into your optical systems but also reduces the overall weight and volume of your end products, while guaranteeing consistent and reliable optical performance.
Moreover, sapphire material is the ideal solution for applications in harsh environments, including high pressure, vacuum, and corrosive conditions. It resists strong acid corrosion, features high compressive strength and a high melting point, and effectively prevents darkening caused by ultraviolet (UV) radiation—ensuring long-term stability in various harsh working scenarios. Beyond industrial and aerospace fields, sapphire windows are also widely applied in watch covers and beauty equipment, perfectly meeting the high-performance requirements of diverse application scenarios and bringing added value to your products.


Phone: +86 189 4674 7897
E-mail: info@aosoptics.com
Whatsapp:8618946747897
Add: Yiju Road High-Tech Zone, Changchun City, Jilin Province, China