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Low Loss HR Mirrors

Wavelength range

190 – 3000 nm


5 – 200 mm


Round, rectangular

Clear aperture


Surface quality, S-D

10-5, 20-10*

Surface flatness, P-V

<λ/8 @ 632.8 nm*


>99.98%, >99.95%


>1 J/cm² @ 1064 nm, 10 ns, 10 Hz

*depending on size

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Low loss HR mirrors are essential in laser systems in which the lowest possible losses are required.

These mirrors are also referred to as IBS mirrors because of their ion-beam sputtering technology. Low loss HR mirrors provide maximum reflectance in a certain wavelength range and angles of incidence (AOI). Wide-angle (AOI 0-45°) mirrors are also available.

IBS coatings are distinguished from other coating technologies by the possibility of reaching extremely high-quality specifications. IBS thin films feature higher density and durability, making them resistant to environmental conditions such as heat, humidity and pressure. They also allow scatter to be minimized in dielectric layers, something that is usually a limiting factor for high reflectivity. In this way, a reflectivity of higher than 99.9% is achieved.


Contact us so we can help you with your challenge. We have a team of experienced coating engineers and metrology capabilities to prototype and transfer your idea into a well-defined production process.

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