Request for Quotation
Also available in 48 h Express-Service
Dielectric mirrors are known for their exceptionally high optical reflectivity, which cannot be achieved at this level with metal-coated mirrors. The optical mirrors have a dielectric multilayer thin film coating, which we have designed for the most common angle of incidence of 45° and which is broadband enough to reflect the entire visible spectrum. 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 such mirror systems 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. Those mirror optics therefore mostly do not provide such an extremely broadband reflectivity as metal-coated mirrors. Instead, they feature a much higher reflection for their optimized wavelength range. Our SHR mirrors are conceptualized for very high reflection for the whole visible wavelength area. This broadband mirror design is of significant advantage for the majority of optical applications and makes the SHR a versatile dielectric mirror. Because the SHR coatings nearly show no optical absorption, almost all incident light can be reflected and used.
We took care that the layers of our 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 because they can separate the VIS from the IR range 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 multiple lasers of VIS and IR-wavelengths. That is possible even at increased laser beam power because the minimal amount of optical absorption of the 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 their thin-film-coatings. In combination with the thermally resistant high-quality borosilicate glass on which the SHR layers are coated, 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 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 detailed coating inquiry if any of these options are of interest to you.
To get a quotation for dielectric SHR mirrors with customized dimensions, please click on the button below:
We manufacture each mirror according to individual size requirements to perfectly fit into the customer's application. We can 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 quote within just a few minutes (provided we are in the same time-zone).
View reflection graph of the dielectric SHR mirrors
(click to enlarge)
© 1994-2019 Präzisions Glas & Optik GmbH