Металлические покрытия (Зеркальные, светоделительные)

Metallic mirror coatings are designed for different regions of the spectrum. Optics-M offers a series of protected metallic coatings capable of providing high reflectance values for applications using wavelengths ranging from 250nm to beyond 10μm. Our standard metallic mirror coatings include Protected Aluminum, Enhanced Aluminum, UV Enhanced Aluminum, Protected Gold and Protected Silver. Protected Aluminum and Enhanced Aluminum are typically used for visible applications. UV Enhanced Aluminum can be used for UV and visible applications. Protected Gold offers high reflectance for Infrared or near-Infrared wavelengths. Protected Silver provides the highest reflectance between 500-800nm but is best suited as a rear surface reflector due to its sensitivity to tarnishing.

Optics-M offers a variety of mirror substrates and geometries coated with our standard metallic mirror coatings, laser-line coatings, as well as, custom broadband, narrowband, single laser line, dual laser line and laser-line beamsplitter coatings.

STANDARD METALLIC MIRROR COATING SPECIFICATIONS

Protected Aluminum

Protected Aluminum is our most popular mirror coating for applications in the visible and near-Infrared. A half wavelength of Silicon Monoxide (SiO) is used as an overcoat to protect the delicate aluminum. This treatment provides an abrasion-resistant surface while maintaining the performance of aluminum.

Enhanced Aluminum and UV Enhanced Aluminum

A multi-layer film of dielectrics on top of aluminum is used to enhance the reflectance in the visible or ultraviolet regions. Enhanced Aluminum is ideal for applications requiring increased reflectance from 400nm-650nm while UV Enhanced Aluminum yields increased reflectance from 250nm-400nm. The multi-layer film also provides the handling characteristics of the protected aluminum coating.

Protected Gold

Protected Gold is effective for applications requiring high reflectance in the near-Infrared and Infrared regions. Since a durable coating is necessary for handling purposes, we offer gold with a Silicon Monoxide overcoat. The performance of gold (96% reflectivity from 750nm-1500nm) is maintained, while providing a more durable finish. 

Protected Silver

Protected Silver offers excellent reflectivity in the visible and infrared regions, making it an excellent choice for broadband applications that span multiple spectra. Silver offers a reflectivity >98% from 500-800nm. A protective coating reduces silver's tendency to tarnish but the coating is ideally suited to low humidity environments.