First Surface Mirrors with Size (mm) 50.8 x 50.8 and Typical Energy Density Limit 0.2 J/cm2 @ 532nm, 10ns and Thickness 6.0

Protected and enhanced aluminum curve
Protected and Enhanced Aluminum Reflectance Curve 250 – 10,000nm

Front Surface Mirror

A front or first surface mirror provides superior optical quality for engineering and scientific applications. Unlike a standard household mirror, which is coated on the second surface of the glass, a first surface mirror provide an accurate reflection without ghost images. Optical experts recommend first surface mirrors for use in precision optics applications.

Metal coatings are typically very fragile without a protective overcoat. A dielectric coating on a metallic mirror increases the durability of the metal coating as well as provides a barrier to help prevent oxidation.  The overcoat has little impact on the performance of the metal coating.

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Protected Aluminum Mirror

Standard Protected Aluminum is our most popular mirror coating for applications in the visible and near-infrared. A layer of Silicon Dioxide (SiO2) is typically used as an overcoat to protect the aluminum layer. This addition to the coating provides an abrasion-resistant surface while maintaining the performance of aluminum mirror. Another option for the overcoat is Magnesium Fluoride (MgF2).

Enhanced Aluminum Mirror

In our Enhanced Aluminum coating, a multi-layer film of dielectrics on top of aluminum is used to increase the reflectance in the visible regions. This coating is ideal for applications requiring increased reflectance from 400 – 650nm. The multi-layer film also provides the same durability characteristics as the protected aluminum coating.

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