Dielectric Mirrors
High-reflection mirror coatings
SHR Series
Special Properties
- Very high broadband reflection in the visible range
- Designed for an angle of incidence of 45°
- Low absorption
- Metal-free all dielectric coating
- High thermal resistance
- Minimal losses
- Excellent infrared transmission
Typical Applications
- Broadband front surface mirror in optical systems
- Redirection mirror
- Beam-separating and combining optics for lighting systems and laser applications
- Injector mirror
- IR filter
- Metal-free mirror for use in strong magnetic fields
- Dichroic mirror (VIS/NIR+IR beam splitter)
Related Products
- SHD-Series
(dielectric cold mirror) - SHP-D Series
(dielectric mirror for polarized and unpolarized light) - SHP-Series
(silver-coated mirror)
RFQ
48-hour Express Manufacturing
Dielectric mirrors offer maximum reflectivity
Dielectric mirrors are based on highly efficient interference-optical thin films. Such front surface mirrors are vital components for a wide range of optical systems and are designed to reflect specific wavelengths of light or lasers with the highest efficiency. They are essential for applications where metallic coatings do not provide enough reflectivity. Unlike conventional metal-coated mirrors, dielectric mirrors consist of several layers of non-metallic materials. Each dielectric coating layer is chosen based on its refractive index to create a layer system that is selectively reflective at specific wavelengths to allow maximum performance. We make these mirrors using a special vapor-deposition process.
High reflectivity across the entire VIS spectrum
Since an all-dielectric mirror has an angle-dependent reflectance and limited optical bandwidth, it is 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 reflection than metal mirror coatings, they typically have a much smaller reflection bandwidth. To combine the advantages of high and broadband reflectivity in one optic, we developed our SHR-mirror. The SHR coating features a reflection bandwidth wide enough for the entire visible spectrum, with very high reflection at an incidence angle of 45°.
Dichroic characteristics
Another feature of our SHR mirror design is that it can separate the visible light from the infrared radiation of a light beam. It offers high optical transmissivity for wavelengths above the visible spectrum up to 2500 nm, allowing the SHR to also operate as an IR filter or dichroic beamsplitter. Some customers use the SHR mirror as a beam-combining optic for lasers with different VIS and IR wavelengths.
High efficiency as a laser mirror
The reflection of laser beams with increased power levels is possible since the SHR's absorption is negligible in its nominal operating wavelength spectrum. Please contact our engineers for information about which lasers, laser beam power, and laser lines you can use our dielectric SHR mirrors for. Please provide your application's details, like wavelength, laser beam diameter, required damage threshold, continuous laser power, and other relevant information.
Thermal stability
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. The prerequisite for this is that the heating process is uniform and the possible temperature gradients across the mirror do not exceed the permissible physical limits.
Customized dielectric mirrors
We also offer custom dielectric mirror designs in serial production quantities according to your detailed requirements. A customized coating design for polarized light, for which our dielectric SHR mirror is unspecified, is also possible with sufficient production quantities. Custom dielectric laser mirrors with increased optical flatness or ultra-high efficiency for a particular laser wavelength are also available on a per-coating-run basis. Moreover, polarization-optimized coatings are feasible in higher quantities, too. The polarization properties are often critical for laser optics, but are undefined for our standard dielectric SHR mirrors. Please send us your detailed coating inquiry if any of these details are critical for your application.
Get a quotation for individually sized dielectric SHR mirrors by clicking the button below or choosing a product from the table.
Specifications
SHR reflection at 45° angle of incidence
Enlarge the curve to view details
Thicknesses
Please click on a listed mirror thickness to start an inquiry:| Thickness (mm) | Tolerance | |
|---|---|---|
| 1.10 | ±0.10 | ✔ |
| 1.75 | ±0.20 | ✔ |
| 3.30 | ±0.20 | ✔ |
| Other thicknesses are possible on demand. | ||
| ✔ = available as part of our 48-hour express production | ||
Reflectance for unpolarized light at 45°
- Ravg > 99% at a wavelength of 425–680 nm at 45°
- Ravg > 97% at a wavelength of 400–690 nm at 45°
- Other wavelength ranges and incident angles per inquiry
- Customized mirror designs for polarized laser redirection applications are feasible on demand.
Substrates
- High-quality selected BOROFLOAT® 33
- Other materials are available on demand
Flatness
Surface quality
- typically better than 80–50 scratch & dig
(MIL-0-13830A) - Higher SQ specification is possible on demand.
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 highly reflective dielectric broadband mirror
Why don't we don't have a shopping cart?
All 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 ship their catalog mirrors with fixed dimensions, making a shopping cart superfluous. If you are in the same time zone, you will receive a quote for your dielectric mirrors with individual dimensions, usually within a few minutes. To get further information about what is possible, please use our information request form.
All data and specifications given are average guide values and are not guaranteed. Moreover, please consider the “Notes on Specifications”.
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Last update: March 05, 2025