Precision dome windows for ROVs, sensors & optical instrumentation

Knight Optical’s dome windows are designed for optical clarity and structural integrity in demanding subaqueous and atmospheric conditions. Their hemispherical shape, formed from dual concentric curved surfaces, ensures uniform wall thickness and natural pressure resistance—making them the ideal viewport solution for submersible ROVs, underwater cameras, and high-pressure enclosures.

Manufactured from BK7, UV-grade fused silica, or sapphire, these domes support wavelengths from deep UV to infrared, tailored for specific optical transmission needs. Standard and custom geometries (5 mm to 300+ mm in diameter) are available, with optional AR coatings and mounting flanges for seamless integration.

Beyond underwater deployments, these domes are widely utilized in meteorology—serving as critical interfaces in pyranometers and pyrgeometers where spectral fidelity and environmental durability are paramount. BK7 delivers excellent visible-to-NIR performance, while UV fused silica excels in UVC sterilization and UV-range measurements, with transmission extending down to 185 nm.

Sapphire options provide superior hardness and resilience for extreme-use scenarios. Every dome is metrology-verified in Knight Optical’s advanced QA facility, ensuring compliance with demanding optical and mechanical specifications.