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Protected Aluminum Mirror, 25.4mm Diameter, 4-6λ
Substrate
Soda Lime Float Glass
Size (mm)
25.4 Diameter
Size Tolerance
±0.76
Thickness
3.0
Coating
Protected Aluminum
Angle of Incidence
45°
Clear Aperture
90%
Surface Flatness
4 – 6λ
Coating Specification
Ravg >85% @ 400 – 700nm
Wavelength Range
400-700nm
Edges
Cut
Surface Quality
80-50
Typical Energy Density Limit
Protective as needed
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Protected Aluminum Mirror, 38.1mm Diameter, 4-6λ
Substrate
Soda Lime Float Glass
Size (mm)
38.1 Diameter
Size Tolerance
±0.76
Thickness
3.0
Coating
Protected Aluminum
Angle of Incidence
45°
Clear Aperture
90%
Surface Flatness
4 – 6λ
Coating Specification
Ravg >85% @ 400 – 700nm
Wavelength Range
400-700nm
Edges
Cut
Surface Quality
80-50
Typical Energy Density Limit
Protective as needed
Evaporated Metal Films (EMF)
First Surface Mirrors with Substrate Soda Lime Float Glass and Typical Energy Density Limit Protective as needed
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.