Optical filters picture, Cold mirror
 
Home / Product Selection / Front Surface Mirrors / SHR Dielectric high-reflection mirrors

Dielectric Mirrors

High-reflection front surface mirror coatings for i=45°

SHR Series

Special Properties

  • Excellent broadband optical reflectivity
  • Made for an angle of incidence of i = 45°
  • Remarkable infrared transmittance
  • Large operating temperature range
  • Very low light absorption
  • Temperature resistant glass substrates
  • 100% dielectric metal free optical layers
  • Ultra-low loss of light energy

Typical Applications

  • Highly reflective mirrors in optical systems
  • Nearly loss free redirection of light & laser beams
  • Dichroic divider mirrors (VIS/NIR+IR beam-splitters)
  • Beam separation or combiner optics for lasers
    with different wavelengths
  • Laser beam injector-mirror optics
  • Infrared filters with excellent reflectivity in the visible
  • Broadband laser mirrors
  • IR- and NIR-filter optics
  • Metal-free mirrors for use in strong magnetic fields

 

Request for Quotation

48h-Express Service Also available in 48 h Express-Service

The dielectric mirrors of our SHR-Series offer an extra high, broadband reflection. They have an exceptional degree of reflectivity for visible wavelengths. The optical mirrors are based on an all-dielectric multilayer thin film coating which has been designed for the most common angle of incidence of i = 45° and can be used to reflect images, light sources, and also laser beams.

Dielectric mirror coatings are constructed by the alternated coating of thin layers of non-metallic materials with a different refractivity one upon the other. Because their reflection is angle-dependent and they have a physically limited optical bandwidth, dielectric mirrors usually are optimized for maximum mirror efficiency at a single wavelength or a specific but limited wavelength area. At the same time, dielectric coatings are usually either optimized for a single angle of incidence or a range of incidence angles. Such mirror optics therefore mostly do not have such an extremely broadband reflectivity as most metal coated mirrors. But instead, they feature a significantly higher reflection for their optimized wavelength range. Our SHR mirrors, however, are conceptualized in such a way to offer the very high reflection that is characteristic for dielectric mirrors over the whole VIS-spectrum. This broadband mirror design is of significant advantage for many optical applications.

In addition to that, we took care that the layers of our dielectric SHR mirrors allow transmission of infrared wavelengths up to 2,5 µm. Hence, they can also be used as effective IR-filters or a dichroic beam splitter optics because they can separate visible from infrared wavelengths very efficiently. This additional function in combination with the low absorption of the dielectric thin-film coating system enables the mirrors even to be used for laser applications and as light source combiner mirrors for light and lasers of VIS and IR-wavelengths. That is possible even at increased laser beam powers because the minimal amount of optical absorption of the dielectric mirror coating within the operating bandwidth is negligible. For information about what lasers, what laser beam power, and what laser lines can be reflected with our dielectric mirrors, please ask our engineers and let them know the details of your application like laser wavelength, laser beam diameter, laser beam power, etc. Of course, also an optimized design for polarized light, for which our standard SHR-mirrors are unspecified, is possible upon sufficient production quantities.

Another worth mentioning feature is the excellent thermal resistance of the thin-film-coatings of our SHR mirrors. In combination with the temperature resistant high-quality borosilicate glass substrate the SHR is coated on, an operating temperature of up to approximately 360 °C is feasible. The heating up process must be uniform though, and possible temperature gradients over the mirror surfaces must not exceed allowed physical limits.

At larger quantities, a customized design regarding most optical requirements is optional for nearly all of our mirror coatings. Whether you need laser optimized dielectric mirrors, if you need a design that filters out infrared light more efficiently, you need an increased optical flatness or surface quality, or ultra high reflection for a particular laser wavelength. All these options and products are possible. Manufacturing with a focus on polarization optimization or the damage threshold of the dielectric coatings is optionally available too. These properties are often critical for laser beam redirecting mirrors and are not a specified parameter for the standard SHR mirror series. Please ask our engineers for support or additional information or send us your inquiry if these options are of interest.

To request a quotation for dielectric SHR mirrors with customized dimensions, please click on the button below:

 

Request for Quotation

48h-Express Service Also available in 48 h Express-Service

 

Why we don't have a shopping cart:

We manufacture each mirror according to the individual dimensioning requirements of the customer. We fabricate optics to size on the basis of our standard optical coatings in a very short time. Often we are even faster than re-sellers can ship their catalog mirror optics with fixed dimensions. Therefore a shopping cart on our website is not required. Just click on the above request button and enter the desired dimensions. You will typically receive your quotation within just a few minutes (provided we are in the same time-zone). So the mirrors perfectly fit into your application, not only into the shopping cart.

Specifications

SHR dielectric mirrors, reflection curve

View reflection graph of the SHR mirrors (click to enlarge)

Naming

  • SHR dielectric, highly reflective broadband
    front surface mirror

Mirror Coating

  • All dielectric, non-metal, low absorption, broadband, thin-film mirror coatings

Substrate Material

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 request
  • Mirror designs for polarized laser redirecting use are feasible on demand

Flatness

Surface Quality

  • typ. better than 80-50 scratch & dig (MIL-0-13830A)
  • Better quality on request if required

Stock Thicknesses

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 information on request.
All given details and specifications are mean reference values and are not guaranteed. Also, please consider our "Notes on specifications".