Cold mirrors operate in the opposite manner as heat reflecting filters do. Such hot mirrors are designed for maximum transmittance in the visible spectrum and maximum reflectivity in the near infrared, whereas cold mirrors are optimized for maximum optical reflectivity of VIS-wavelengths and best possible transmittance of the infrared range (thermal energy). So, cold mirrors work as heat transmitting filters and at the same time they offer a very high visible light reflection. Our SHD-mirrors are flat, dielectric, front surface coated optics, that allow an almost loss-free reflection of visible light at an angle of incidence of 45°. They are used for applications, that require a good imaging quality and a very strong reflectivity in the wavelength range of approximately 400-700 nm. The dichroic coating system of our cold mirrors very effectively filters out infrared-energy from a illumination source up to approximately 2500 nm, which results in a cold light beam reflected by 45°. This very broadband transmissivity in the infrared wavelength range is a great advantage over hot-mirrors in terms of efficiency of removing thermal energy from a light beam, because the IR-blocking range of a hot mirror usually is much narrower.
The SHD is coated on temperature resistant glass substrates. Hence, the SHD mirror is a very good choice for very efficient heat- / light separation systems, because most of the IR-energy is removed by IR-transmissivity and therefore cannot warm up the filters as much. The dielectric multilayer thin film coating design features an outstanding temperature resistance, and shows a distinguished resistance against moisture and abrasion. If required, the coating of our SHD cold mirrors can be modified for different transmission-, reflectivity- and filter ranges, as well as in regards to the cut-on and cut-off points and incidence angle. Other glass substrates are optionally possible. Please use our customized optics inquiry sheet, to conveniently inquire for your individually made optical coating design. For further information, please use our information questionnaire.
We are not limited to a small stock delivery program with predefined dimensions. Our strength is to be just as quick or even quicker with individually sized optics products as you might be used to, when you buy catalog items. In other words, you can order the cold mirrors exactly at the size you need them, without the disadvantage of a long lead time.
To request a quotation for cold mirrors of the SHD series with individual dimensions, please click the button below:
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All given details and specifications are mean reference values and are not guaranteed. In addition, please consider the "Notes on specifications"