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Enhanced Aluminum Mirror, 50.8 x 50.8mm, 4-6λ
Optical Coating
Enhanced Aluminum
Substrate
Soda Lime Float Glass
Size (mm)
50.8 x 50.8
Size Tolerance
±0.25
Thickness
3.0
Angle of Incidence
45°
Clear Aperture
90%
Surface Flatness
4 – 6λ
Coating Specification
Ravg >95% @ 450 – 650nm
Wavelength Range
450-650nm
Edges
Cut
Surface Quality
80-50
Typical Energy Density Limit
0.2 J/cm2 @ 532nm, 10ns
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Protected Aluminum Mirror, 50.8 x 50.8mm, 4-6λ
Optical Coating
Protected Aluminum
Substrate
Soda Lime Float Glass
Size (mm)
50.8 x 50.8
Size Tolerance
±0.76
Thickness
3.0
Angle of Incidence
45°
Clear Aperture
90%
Surface Flatness
4 – 6λ
Coating Specification
Ravg >85% @ 400 – 700nm
Wavelength Range
400-700nm
Edges
Cut, 0.5mm Maximum Edge Chip
Surface Quality
80-50
Typical Energy Density Limit
0.3 J/cm2 @ 532nm & 1064nm, 10ns
Evaporated Metal Films (EMF)
First Surface Mirrors with Size (mm) 50.8 x 50.8 and Thickness 3.0 or 2.0 and Surface Quality 80-50
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.