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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.
Advantages of highly reflective mirrors
- Very high reflection (up to almost 100%)
- Robust against external influences
- Spectral range: UV to IR
- Adjustable angle of incidence
- Efficient deflection of polarized light
- Substrates: glass, ceramics, plastics, metals
Typical applications for HR mirrors
- Sensor technology
- Measuring technology, optical measuring devices
- Laser mirrors, laser scanner mirrors
- Scanning mirrors
- Camera technology
FAQ – The five most frequently asked questions about highly reflective mirrors
Highly reflective mirrors (HR mirrors) are optical components that enable almost complete reflection of light in a defined wavelength range. They are used to minimize losses due to transmission and absorption and are used in areas such as dentistry, laser technology, measurement technology, and camera technology.
High reflectivity is achieved through dielectric interference coating systems. These consist of materials with high and low refractive indices that are arranged in such a way that interference effects maximize reflection and minimize transmission.
The advantages include:
- Very high reflectivity (up to almost 100%)
- Color-neutral reproduction even at high angles of incidence
- High hardness and chemical resistance
- Adaptation to different spectral ranges (UV to IR)
- Robustness against external influences
The substrates for HR mirrors can be made of glass, ceramics, plastics, or metals. The coatings are dielectric and ensure the desired optical performance.
Highly reflective mirrors are used in many areas, including:
- Dentistry (e.g., dental mirrors)
- Laser technology (laser mirrors, scanner mirrors)
- Measurement technology and optical measuring devices
- Camera technology
- Sensor technology
More options for mirror coatings
Other mirror coatings that may be relevant for your type of application:
