Metallic Mirrors

Specifications General Precision High Precision
Material BK7, Fused Silica or others

Dimension Tolerance +0.0, -0.2mm +0.0, -0.05mm
Clear Aperture >85% >90%
Flatness λ/4@632.8nm   λ/8@632.8nm 
Surface Quality 60-40 20-10
Parallelism 3 arc min 3 arc sec
Bevel 0.25mm x 45°
Coating Polished and Metallic coating just on one surface, fine ground on the other surface

Coating Types Reflectivity
UV Enhanced Aluminum Ravg > 86% from 250nm to 400nm
Protected Aluminum Ravg > 87% from 400nm to 800nm
VIS Enhanced Aluminum Ravg > 93% from 450nm to 750nm
Protected Silver Ravg > 95% from 400nm to 20um
Protected Gold Ravg > 98% from 650nm to 16um