Features: 
● Virtue: offer high resolution image from as far as 200 meters 
● Material: PC
● UV-resistant,flameresistant 
● Dome shell precision: 0.5-1um 
● Surface roughness: 1-10nm 
● Transmittance: ≥95% 
● Distortion: ≤0.1% 
● Refractive index: 1.491 
● Dispersive coefficient: 57.2 
● Surface rigidity: 3H