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Low Loss HR Mirrors

Typical wavelength range

250 – 3000 nm

Available dimension range

5 – 200 mm


Round, rectangular, elliptical

Clear aperture


Surface quality, S-D


Surface flatness, P-V

<λ/8 @ 632.8 nm**


>99.98%, >99.95%


>17 J/cm² @ 1064 nm, 10 ns, 10 Hz

*100% CA available on request

**depending on the size of the element

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Low Loss HR mirrors are essential in laser systems where the lowest possible losses are required.

Mirrors are manufactured using advanced sputtering technologies. Low Loss HR mirrors provide maximum reflection in a certain wavelength range and angle of incidence (AOI). Wide-angle (AOI 0-50°) mirrors are also available.

Ion beam sputtering (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 compared to evaporated ones, making them resistant to environmental conditions such as heat, humidity and pressure. They also allow scattering to be minimized in dielectric layers which is usually a limiting factor for achieving high reflectivity.

Typical Items for Low Loss HR Mirrors
Substrate material Dimensions, mm Reflectance, % Wavelength, nm Product ID for AOI=0°
UVFS Ø25.4x5 >99.9 343-355 1-OS-2-0254-5-[1B00-IBS]
UVFS Ø25.4x5 >99.9 515-532 1-OS-2-0254-5-[1F00-IBS]
UVFS Ø25.4x5 >99.95 1030-1064 1-OS-2-0254-5-[1PR00-IBS]
Reflectance s/p, % Product ID for AOI=45°
UVFS Ø25.4x5 >99.9/>99.7 343-355 1-OS-2-0254-5-[1B45-IBS]
UVFS Ø25.4x5 >99.97/>99.93 515-532 1-OS-2-0254-5-[1F45-IBS]
UVFS Ø25.4x5 >99.97/>99.93 800 1-OS-2-0254-5-[1K45-IBS]
UVFS Ø25.4x5 >99.98/>99.93 1030-1064 1-OS-2-0254-5-[1PR45-IBS]
UVFS Ø30x5 >99.98/>99.93 1030-1064 1-OS-2-0300-5-[1PR45-IBS]
BK7 Ø25.4x6 >99.98/>99.93 1550 1-OS-1-0254-6-[1V45-IBS]

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