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 a pure dielectric multilayer thin film coating which has been designed for the most common angle of incidence of i = 45° and they can be used to reflect images, light sources, and also laser beams.
Dielectric mirror coatings are constructed by 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 efficiency at a single wavelength or for a specific but limited wavelength area. At the same time dielectric coatings are usually either optimized for one single angle or for a range of angles of incidence. Such 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 is conceptualized in such way to offer the very high reflection that is characteristic for dielectric mirrors over the whole VIS-spectrum. This broadband mirror design is of great 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 as 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 enable 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 very small 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 good thermal resistance of the thin-film-coatings of our SHR mirrors. In combination with the temperature resistant borosilicate glass substrate 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 in terms of 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 ultra high reflection for a special laser wavelength. All these options and products are possible. A manufacturing with focus on polarization optimization or on the damage threshold of the dielectric coatings is possible too. This is often a requirement for laser beam redirecting mirrors and it is not a specified parameter for the standard SHR mirror series. Please ask our engineers for support or additional information or send us your enquiry if these options are of interest.
To request a quotation for dielectric SHR mirrors with customized dimensions please click on the button below:
Why we don't have a shopping cart:
That is quite simple! We manufacture each part according to the individual dimensioning requirements of the customer. We fabricate optics to your dimension requirements 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 optics with fixed dimensions. Therefore a shopping cart on our website is not required. Simply click on the above request button and enter the desired dimensions. You will normally receive your individual quotation within just a few minutes (provided we are in the same time-zone). So the mirrors perfectly fit into your applications, not only into the shopping cart.