Metallic Coated Mirrors
Wide spectral range
Not sensitive to the incidence angle and polarization state
Low cost
Relatively low reflectance
Low laser damage threshold
Substrate Materials: N-BK7, Fused silica, Pyrex;Float glass
Dimensional tolerance: +/-0.1mm
Surface quality:  60-40
Parallelism:  3’
Flatness: λ/4 per 25mm@633nm
Bevel: Protective
One surface: Polished and Metallic coating
The other surface:  Fine ground
Coating type:
UV Enhanced Aluminum  Ravg > 85% from 250nm to 400nm
Protected Aluminum        Ravg > 87% from 400nm to 800nm
Protected Silver              Ravg > 95% from 400nm to 20um
Protected Gold               Ravg > 98% from 650nm to 16um
Note: Aluminum is the most widely used metal reflection film, from near UV to near IR, have high reflectivity, and with low
cost. Silver has higher reflectivity in the visible and near infrared wavelength than the aluminum film, but the silver in the
air will be rapid oxidation, color darkening, makes the film performance and firmness declined rapidly. Gold film has a
good consistency with high reflectivity in the near, middle and far infrared range, can control the thermal radiation
effectively, but it is relatively soft, easy bruising, and should be pay very attention to clean, and the cost is very high.

Ms. Lin

Mr. Wen