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Dielectric Mirrors

High-reflection front surface mirror optics
SHR Series

Special Properties

  • High broadband reflectivity
  • Designed for an angle of incidence of 45°
  • Excellent infrared transmittance
  • Large operating temperature range
  • Low absorption
  • Temperature-resistant glass substrate
  • 100% metal-free dielectric layers
  • Very low absorption losses

Typical Applications

  • High reflection mirror in optical applications
  • Redirection mirrors
  • Beam separation and combining optics for lighting systems and lasers
  • Injector mirrors
  • Infrared filters in optical systems
  • Broadband mirror optics
  • Mirrors used in strong magnetic fields
  • Dichroic divider mirror (VIS/NIR+IR beam splitters)

Related mirror types

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Dielectric mirrors provide maximum reflection

Dielectric mirrors are known for their excellent optical reflectivity, which far exceeds that of metal-coated mirrors. A dielectric mirror coating consists of multiple thin layers of non-metallic materials with different refractive indices. These thin-film layers create a coating system capable of almost loss-free reflection.

Since dielectric mirrors operate angle-dependent and have a limited optical bandwidth by physics, their coatings usually are optimized for high reflection for a single wavelength or a specific but limited wavelength range. Also, a dielectric mirror is often designed for only one or a small range of incidence angles. It provides higher optical efficiency within the optimized wavelength range than metallic mirror coatings, which, on the other hand, usually offer a wider reflection bandwidth than dielectric mirrors. To combine high efficiency and broadband reflectivity in one all-dielectric mirror, we have developed our SHR-Series, which has enough optical bandwidth to reflect the entire visible spectrum at an angle of incidence of 45°. The SHR mirror coatings reflect images, light sources, and laser beams. When operating at their design incidence angle, the mirrors almost show no absorption and nearly reflect all light.

We have also ensured that the SHR mirrors feature high transmission for infrared wavelengths above the visible spectrum up to 2500 nm. Therefore, the SHR mirror also operates as an IR-filter optic or as a dichroic beam splitter to separate the visible wavelength range from infrared light. Furthermore, the mirrors can work as dichroic beam combination optics for laser systems with different wavelengths in the VIS and IR wavelength range. The reflection of laser beams with increased power levels is also possible since the dielectric layers' optical absorption is negligible in the nominal operating wavelength spectrum. Please contact our engineers for information about what lasers, laser beam power, and laser lines you can reflect with our dielectric mirrors. Please provide the application's details like wavelength, laser beam diameter, laser energy, damage threshold, and other relevant information. A customized mirror design for polarized light, for which our dielectric SHR-mirror is unspecified, is possible upon sufficient production quantities.

Another highlight of our dielectric SHR mirrors is their excellent thermal stability. Thanks to temperature-resistant high-quality borosilicate glass substrates, the mirror can operate at a temperature of up to about 360 °C. In such applications, the heating process must be uniform, and potential temperature gradients across the mirror surfaces may not exceed the permissible physical limits.

 

Customized dielectric mirrors

At serial production purchase quantities, a customized dielectric mirror design is possible too. No matter whether you need laser-optimized mirrors, a mirror that filters the infrared even more efficiently, an increased optical flatness, or ultra-high efficiency for a particular laser wavelength, all these designs are possible. A polarization optimization and definition of the dielectric layers' damage threshold are also feasible at batch quantities. Such properties are often critical for laser redirecting mirrors. They are undefined for the standard dielectric SHR mirror series. Please ask our engineers for additional support or specifications, or send us your detailed coating inquiry if any of these options are of interest to you.


Get a quote for individually-sized dielectric SHR mirrors by clicking the button below or by choosing a thickness from the table.

 

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Specifications


Reflection spectrum of our dielectric
SHR mirrors

SHR dielectric mirrors, reflection curve
Enlarge curve to view details


Standard Thicknesses

(Please click on a glass thickness to get a quote)

Thickness (mm)

Tolerance

48h-Express Service
1,10 ±0,10
1,75 ±0,20
3,30 ±0,20
Custom thicknesses on request.
The thicknesses marked with "" are also available within 48–h Express Service.

Optical reflection for unpolarized light at 45°

  • Ravg > 99% at wavelength 425-680 nm at 45°
  • Ravg > 97% at wavelength 400-690 nm at 45°
  • Other wavelength ranges and incident angles per inquiry
  • Custom mirror designs for polarized laser redirecting applications are feasible on demand.

Substrates

Flatness

Surface Quality

  • typically better than 80-50 scratch & dig
    (MIL-0-13830A)
  • Increased quality possible if required.

Mirror Coating

  • All-dielectric
  • Metal-free
  • Low absorption
  • Broadband thin-film layer-system

Other Properties

  • Adherence to MIL-C-675 C (tape test)
  • Abrasion-resistant to MIL-M-13508 C
  • The damage threshold is not specified for the SHD series. More details available on request.

Naming

  • SHR dielectric highly reflective broadband mirror


Why don't we have a shopping cart?

All the dielectric mirrors we manufacture are tailored to individual dimension requirements to perfectly fit the customer's application. We fabricate mirror optics to size based on our standard optical coatings shown on our website very quickly. We are often even faster than re-sellers can ship their catalog mirrors with fixed dimensions, making a shopping cart superfluous. Just click on one of the RFQ-buttons or select a mirror thickness shown in the table and enter the desired dimensions. Provided we are in the same time-zone, you typically receive the quotation for your mirrors within just a few minutes.

 

All given details and specifications are mean reference values and are not guaranteed. Also, please consider our "Notes on specifications".

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