Highly reflective mirrors

Highly reflective mirrors increase reflection for defined wavelength ranges

The primary objective of highly reflective coatings, or mirror coatings, is to maximise reflection within a specific wavelength range while minimising transmission. Highly reflective (HR) mirrors are characterised by their ability to reflect radiation to an extent approaching 100%. This exceptional reflectivity is achieved by complex dielectric layer systems, often referred to as interference layer systems. These systems incorporate coating materials with high (H/high) and low (L/low) refractive indices, optimising interference to enhance reflectivity.

Highly reflective coatings effectively diminish radiation losses attributable to transmission and absorption, resulting in mirrors that exhibit neutral colour reproduction even at high angles of incidence (AOI). Furthermore, dielectrically coated mirrors boast increased hardness and exhibit good resistance to chemical influences.

An illustrative example of highly reflective mirrors can be found in dental mirrors, such as mouth mirrors, which are used in dentistry.