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Dielectric Mirrors

High-reflection front surface mirrors
SHR Series

Special Properties

  • Very high broadband visible reflection
  • Designed for an incidence angle of 45°
  • Low absorption
  • Metal-free dielectric coating
  • High-temperature resistant
  • Minimal losses
  • Excellent infrared transmission

Typical Applications

  • Mirrors in optical systems
  • Redirection mirrors
  • Beam-separating and combining optics for lighting systems and laser applications
  • Injector mirrors
  • IR filters for lighting systems
  • Broadband mirrors
  • Mirrors for use in strong magnetic fields
  • Dichroic mirrors (VIS/NIR+IR beam splitters)

Related Products

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Dielectric mirrors offer maximum reflectivity

Dielectric mirrors are based on highly efficient interference-optical thin film coatings. They are vital components for a wide range of optical systems. Such mirrors are designed to reflect specific wavelengths of light or lasers and are essential for applications where metallic coatings do not provide enough reflectivity. Unlike conventional front surface mirrors that use metal coatings, dielectric mirrors consist of multiple layers of dielectric materials. The material of each dielectric coating layer is chosen based on its refractive index to create a layer system that is selectively reflective at specific wavelengths with the highest efficiency. We make these mirrors using a special vapor deposition process. Since all-dielectric mirrors show angle-dependent reflectivity and limited optical bandwidth, such coatings are usually optimized for single spectral lines or a narrowband wavelength region. Moreover, dielectric mirror optics are often designed for only one or a small range of incident angles. Although they offer far higher efficiency in their optimized wavelength ranges than standard metal mirror coatings, they typically have a much smaller reflection bandwidth. To combine the advantages of high efficiency and broadband reflectivity in one mirror, we developed our SHR-mirror design, which features a bandwidth wide enough to reflect the entire visible spectrum at an incidence angle of 45° with very high reflection. Another interesting feature of our SHR mirrors is that they can separate the visible light from the infrared radiation of a light beam. They offer high optical transmissivity for wavelengths above the visible up to 2500 nm, allowing the SHR to also operate as an IR filter or dichroic beamsplitter. Furthermore, some customers use the SHR mirror as a beam-combining optic for multiple lasers with different VIS and IR wavelengths. Moreover, the reflection of laser beams with increased power levels is possible since the dielectric layers' absorption is negligible in the nominal operating wavelength spectrum. Contact our engineers for information about which lasers, laser beam power, and laser lines you can reflect with our dielectric SHR mirrors. Please provide the application's details, like wavelength, laser beam diameter, required damage threshold, continous laser power, and other relevant information. An additional highlight of our SHR mirror is its excellent thermal stability. The mirror can operate up to 350 °C thanks to its temperature-resistant, high-quality borosilicate substrate, provided the heating process is uniform and potential temperature gradients across the mirror surfaces do not exceed the permissible physical limits.

 

Customized dielectric mirrors

We also provide custom dielectric mirror designs in serial production quantities according to your detailed requirements. A customized coating for polarized light, for which our dielectric SHR-mirror is unspecified, is also possible with sufficient production quantities. Dielectric laser mirrors with increased optical flatness or ultra-high efficiency for a particular laser wavelength are also possible. Moreover, polarization-optimized coatings are feasible in higher quantities, too. These properties are often critical for laser optics but are undefined for the standard dielectric SHR mirrors. Please send us your detailed coating inquiry if you need any of these options for your application.


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

 

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Specifications


Reflection spectrum of our dielectric
SHR mirrors

SHR dielectric mirrors, reflection curve
Enlarge the curve to view details


Standard Thicknesses

Please click on a thickness to open an inquiry:

Thickness (mm)

Tolerance

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1,10 ±0,10
1,75 ±0,20
3,30 ±0,20
Other thicknesses are possible on demand.
The thicknesses marked with "" are also available within 48–hour express service.

Reflectance for unpolarized light at 45°

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

Substrates

Flatness

Surface Quality

  • typically better than 80-50 scratch & dig
    (MIL-0-13830A)
  • Higher SQ-specification is possible if required.

Mirror Coating

  • Only dielectric layers
  • 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 unspecified for the SHR series. More details are available on demand.

Naming

  • SHR dielectric, highly reflective broadband mirror


Why don't we need a shopping cart?

All dielectric mirrors we manufacture are fabricated to individual dimensions to fit the customer's application perfectly. We are often faster with custom sizes than re-sellers can ship their catalog mirrors with fixed dimensions, making a shopping cart superfluous. Click an RFQ button or on a mirror thickness from the table to enter the desired dimensions. If you are in the same time zone, you will receive the quote for your mirrors, usually within 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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Last update: 16.02.2024