Metal Mirrors » Protected Aluminum

Protected Aluminum is the most commonly used metal coating for less demanding, general purpose applications.

As a front surface reflector, aluminum is overcoated with one of several transmissive materials, depending on the wavelength region of interest. As a back surface reflector, aluminum is overcoated with a black epoxy paint.

Protected aluminum is not sensitive to wavelength, angle of incidence and polarization, so it useful for a wide range of low power monochromatic and polychromatic applications. Durability meets MIL SPEC requirements.

RMI Standard Specifications
λ (μm):	% R, PAL:
0.22	90.5
0.26	91.2
0.30	91.3
0.34	91.5
0.38	91.5
0.40	91.4
0.45	91.2
0.50	90.8
0.55	90.5
0.60	90.1
0.65	89.5
0.70	88.7
0.75	87.6
0.80	85.7
0.85	85.7
0.90	88.1
0.95	91.4
1.00	93.0
1.50	96.4
2.00	96.8
3.00	97.0
4.00	97.2
5.00	97.4
6.00	97.5
7.00	97.6
8.00	97.7
9.00	97.7
10.0	97.7
15.0	97.7
20.0	97.7

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Metal Mirrors » Protected Aluminum