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Dielectric Mirrors

High-reflection front surface mirror optics
SHR Series

Special Properties

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

Typical Applications

  • High reflection mirrors in optical applications
  • Nearly loss-free redirection of light and laser beams
  • Beam separation and combining optics for laser
    and lighting systems
  • Laser beam injector mirrors
  • Infrared filters
  • Broadband laser optics
  • Mirror optics with IR- and NIR-filter function
  • Mirrors for the use in strong magnetic fields
  • Dichroic divider mirrors (VIS/NIR+IR beam splitters)

Related mirror types

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Dielectric mirrors for maximum reflection

Dielectric mirrors are known for their very high 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, coated on top of each other. These thin-film layers create a coating system capable of almost loss-free reflection.

Since dielectric mirrors are 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. Likewise, dielectric mirrors are often designed either for only one or a small range of incidence angles. Within the optimized wavelength range, they generally have a much higher optical efficiency than metallic mirrors, which, on the other hand, can often offer a wider reflection bandwidth than dielectric mirrors. To combine the advantage of high efficiency and broadband reflectivity, we have developed our SHR mirrors. They provide enough bandwidth to reflect the entire visible light spectrum at the most common angle of incidence of 45°. The SHR mirror coatings can reflect images, light sources, and laser beams. They almost show no absorption and nearly completely reflect all incident light.

We have also ensured that the SHR mirrors allow high transmission for infrared wavelengths above the visible spectrum up to 2,5 µm. Therefore, the mirror optics can also work as IR filters or as dichroic beam splitters, since they can separate visible from infrared light. Furthermore, the dielectric layer construction enables our SHR mirrors to work as dichroic beam combination optics for light or laser systems with different wavelengths in the VIS and IR wavelength range. The reflection of higher laser powers is also possible since the dielectric layers' optical absorption is negligible in the operating wavelength spectrum. Please contact our engineers to aks for information about what lasers, laser beam power, or laser lines you can reflect with our dielectric mirrors. Let them know your application details like wavelength, laser beam diameter, laser energy, damage threshold, and other relevant information. Moreover, a customized mirror design for polarized light, for which our dielectric SHR-mirrors are unspecified, is possible upon sufficient production quantities.

Another highlight of our dielectric SHR mirrors is excellent thermal stability. Thanks to temperature-resistant high-quality borosilicate glass substrates, the mirrors 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 larger purchase quantities, a customized dielectric mirror design of our SHR-mirrors is possible. No matter whether you need laser-optimized dielectric 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 generally possible. A polarization optimization and definition of the dielectric layers' damage threshold are also feasible at batch quantities. These properties are often critical for laser redirecting mirrors and are not specified for the standard dielectric SHR mirror series. Please ask our engineers for support or additional 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

  • typ. better than 80-50 scratch & dig (MIL-0-13830A)
  • Better 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 standard design. More details available on demand.

Naming

  • SHR dielectric highly reflective broadband mirror


Why don't we have a shopping cart?

All the dielectric mirrors we manufacture are made according to individual dimension requirements fit into the customer's application perfectly. 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 and 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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