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Dielectric Mirrors

High-reflection front surface mirror optics
SHR Series

Special Properties

  • High broadband reflectivity
  • Designed for 45° angle of incidence
  • Excellent infrared transmittance
  • Large operating temperature range
  • Low absorption
  • Temperature-resistant glass substrates
  • 100% metal-free dielectric coating
  • Low loss design

Typical Applications

  • Highly efficient mirrors in optical systems
  • Nearly loss-free redirection of light & laser beams
  • Dichroic divider mirrors (VIS/NIR+IR beam splitters)
  • Beam separation and combining optics for lasers
    with different wavelengths
  • 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
  • High-performance heat/light separating applications

Related mirror types

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Dielectric mirrors for maximum reflection

Dielectric mirror coatings are known for high optical reflectivity, on a level far above that metal coatings can provide. This high reflection is achieved by the deposition of thin layers of non-metallic materials with different refractive indices deposited on top of each other, creating a coating system capable of almost loss-free reflection.

Since the reflection of dielectric mirrors is angle-dependent, and they have a physically limited optical bandwidth, their coatings are usually optimized for high efficiency for a single wavelength, or a specific but limited wavelength range. Likewise, dielectric mirrors are often designed either for only one angle of incidence or a small variety of incidence angles. For this reason, dielectric mirrors generally have a much higher efficiency within the optimized wavelength range than metal-coated mirrors, which, on the other hand, can offer a broader bandwidth. To combine the advantage of high efficiency and broadband reflectivity in one mirror, we have developed the 100% dielectric optical coating of our SHR mirrors. It offers enough bandwidth to reflect the entire visible light spectrum at the most common angle of incidence of 45° with exceptional efficiency. This broadband dielectric mirror design is advantageous for most optical applications in the visible wavelength range. Our dielectric SHR mirror coatings can reflect images, light sources, and laser beams. They almost show no absorption and reflect nearly all incident light.

Also, we have made sure that the mirror coating and the substrate of our SHR mirrors allow high transmission for infrared wavelengths up to 2,5 µm. The mirror optics can, therefore, also be used as IR filters or as dichroic beam splitters, because they can very effectively separate the visible from infrared light. Furthermore, the dichroic dielectric coating construction allows the use of our SHR mirrors as a beam combination optics for light or laser systems with different wavelengths in the VIS and IR spectrum. The reflection of higher laser power is also possible since the very low optical absorption of the dielectric mirrors is negligible for the designed operating wavelength. For information about what lasers, laser beam power, or laser lines you can reflect with our dielectric mirrors, please contact our engineers. Please let us know the details of your application like wavelength, laser beam diameter, laser energy, damage threshold, and other relevant technical information. Moreover, also an optimized mirror design for polarized light, for which our dielectric SHR-mirrors are unspecified, is possible upon sufficient production quantities.

Another highlight of our SHR mirrors is the excellent thermal stability of their dielectric coating. By using temperature-resistant high-quality borosilicate glass, the mirrors can be used at a temperature of up to about 360 °C. The heating process must be uniform, and potential temperature gradients across the mirror surfaces must not exceed the permissible physical limits, though.

 

Customized dielectric mirrors

At larger 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 out the infrared even more efficiently, an increased optical flatness, or an ultra-high efficiency for a particular laser wavelength, all these mirror coatings are generally possible. Also, a polarization optimization and definition of the damage threshold of the dielectric layers are 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
  • Damage threshold 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 in our website very quickly. Often we are even faster than re-sellers can ship their catalog mirrors with fixed dimensions, which makes 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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