Dielectric Front Surface Mirrors
High-reflection coatings
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
- Front surface mirror in optical systems
- Redirection mirror
- Beam-separating and combining optics for lighting systems and laser applications
- Injector mirror
- IR filters for lighting systems
- Broadband mirror
- Mirror for use in strong magnetic fields
- Dichroic mirror (VIS/NIR+IR beam splitters)
Related Products
- SHD-Series
(dichroic cold mirror) - SHP-D Series
(dielectric mirrors for polarized and unpolarized light) - SHP-Series
(silver-coated mirror)
RFQ
48-hour Express Manufacturing
Dielectric Mirrors offer Maximum Reflectivity
Dielectric front surface mirrors are based on highly efficient interference-optical thin films. 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 metal-coated mirrors, dielectric mirrors consist of several 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.
High Reflectivity Across the Entire Visible Spectrum
Since all-dielectric mirrors show angle-dependent reflection 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 reflection in their optimized wavelength ranges than standard metal mirror coatings, they typically have a much smaller reflection bandwidth. To combine the advantages of high and broadband reflectivity in one mirror, we developed our SHR-mirror, which features a bandwidth wide enough to reflect the entire visible spectrum with very high reflection at an incidence angle of 45°.
Dichroic Properties
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 range of 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 for Lasers
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 reflect with our dielectric SHR mirrors. 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, 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 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 demand. Moreover, polarization-optimized coatings are feasible in higher quantities, too. The polarization properties are often critical for laser optics, but are undefined for the 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
Reflection spectrum of our dielectric
SHR mirrors
Enlarge the curve to view details
Standard Thicknesses
Please click on a listed 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. | ||
| The thicknesses labelled with "✔" are also 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 also feasible on demand.
Substrates
- 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 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. If you are in the same time zone, you will receive a quote for your dielectric 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: Sep. 06, 2024