Metallic Coatings are very broadband and relatively insensitive to incidence angle. They offer good performance at a low price. Although they are most commonly used, metallic reflective coatings are delicate and require crae during cleaning. They are only recommended for low power applications.

The three commonly used Metallic coatings are: Aluminum, Silver, and Gold.

Dichroic Mirrors are designed to reflect one wavelength and transmit the other wavelength. The angle of incidence is usually at 0 deg or 45 deg.

High Energy Reflective Dielectric Coated Mirrors provide excellent performance over a specific wavelength range. The maximum reflectivity can be up to 99.9% at a specific wavelength and angle of incidence.

Dielectric coatings exhibit superior durability and damage resistance.