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Laser mirrors are high-reflectivity optical coatings specifically designed for laser systems. They are used to effectively guide and control laser beams, ensuring beam path stability and energy efficiency.
Based on their function, they can be categorized into high-reflectivity (HR) mirrors and partial-reflectivity (PR) mirrors, which are commonly used for beam reflection and power splitting applications, respectively.
These mirrors are typically composed of multilayer interference structures, created by stacking materials with alternating high and low refractive indices—such as HfO₂ and SiO₂—using evaporation or sputtering processes. By optimizing the coating design and deposition quality, they achieve high-performance specifications, including reflectivity levels ranging from 99.8% to 99.999%, along with low absorption and minimal scattering.
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