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Dielectric Mirrors

High-reflection front surface mirror optics
SHR Series

Special Properties

  • High broadband optical reflectivity
  • Designed for 45° incidence
  • Excellent 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 combining optics for lasers
    with different wavelengths
  • Laser beam injector mirrors
  • Infrared filters with excellent reflectivity in the visible
  • Broadband laser optics
  • High reflection mirror with IR- and NIR-filter function
  • Mirrors for the use in strong magnetic fields
  • Heat/light separating systems

 

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Dielectric mirrors offer maximum reflection

Dielectric mirrors are known for their exceptionally high reflectivity. We optimized our SHR mirrors for the visible spectrum. The optical mirrors have an all-dielectric multilayer thin film coating which we designed for the most common angle of incidence of 45°. They can be used to reflect images, light sources, and also laser beams very efficiently. 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 ultra-high mirror efficiency for a single wavelength or for a specific but limited wavelength area. At the same time, dielectric mirrors are usually either optimized for only one or a small range of incidence angles. Such mirror optics therefore mostly do not provide such an extremely broadband reflectivity as most metal-coated mirrors offer. Instead, they feature a much higher reflection for their optimized wavelength range. Our SHR mirrors are conceptualized in such a way to offer this very high reflection characteristic typical for dielectric mirrors for the whole visible spectrum. This broadband mirror design is of significant advantage for the majority of optical applications. Because dielectric coatings nearly show no optical absorption, almost all incident light can be reflected and used.

We took care that the layers of our dielectric SHR mirrors also allow transmission of infrared wavelengths up to 2,5 µm. Hence, the SHR mirrors can also be used as effective IR-filters or as dichroic beam splitters as they can separate the visible from infrared wavelengths very efficiently. This additional function in combination with the low absorption of the dielectric thin-film coating system enables our mirrors even to be used with laser systems and as light source combiner mirrors for light and lasers of VIS and IR-wavelengths. That is possible even at increased laser beam power 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 wavelength, laser beam diameter, laser power, and similar specifications. 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 of our SHR mirrors is the excellent thermal strength of the thin-film-coatings of our SHR mirrors. In combination with the thermally resistant high-quality borosilicate glass on which the SHR layers are coated on, an operating temperature of up to approximately 360 °C is feasible with our dielectric mirror. The heating up process must be uniform though, and possible temperature gradients over the mirror surfaces must not exceed allowed physical limits.

 

Customized dielectric mirrors

At larger quantities, a customized design also for our SHR-mirror coatings is possible. If you need laser optimized dielectric mirrors, a model that filters out infrared light even more efficiently, you need an increased optical flatness or surface quality, or an ultra high reflection for a particular laser wavelength, all these options are generally possible. Manufacturing with a focus on polarization optimization or the damage threshold of the dielectric coatings is feasible 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 custom coating inquiry if any of these options are of interest to you.

 

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 size requirements of the customer, so that it fits perfectly into the respective application. We fabricate optics to size from 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 which makes a shopping cart superfluous. Just click on the above RFQ-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).

 

Specifications

SHR dielectric mirrors, reflection curve

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

 

Naming

  • SHR dielectric, highly reflective broadband mirror

Mirror Coating

  • All-dielectric, metal-free, 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".

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