A cold mirror works the opposite way dichroic hot mirror filters works. Hot mirrors are designed for maximum transmission in the visible and maximum reflectivity in the near infrared, whereas cold mirrors are optimized for maximum reflectivity of the visible wavelengths and best possible transmittance in the infrared range (heat). They work as heat filters and at the same time they reflect visible light very efficiently.
Our SHD series are flat, dielectric front surface coated optics, used in applications that require a very strong reflectivity in the visible wavelength range and an excellent quality reflecting optic for an incidence angle of 45°. At the same time, the dichroic coating system like the one of our SHD very effectively filters out most of the infrared energy from a illumination source up to approximately 2500nm, resulting in a cool reflected light beam. This very broadband transmissivity in the infrared wavelength range is a great advantage over a hot mirror in regards to efficiency, when it is critical to remove or filter out the heat energy from a system, because the reflectivity wavelength range of hot mirrors for physical reasons is limited to a more narrow band in the infrared.
The SHD is coated on temperature resistant glass substrates. Hence it is a good choice for very efficient heat-light separation systems, because most of the IR-energy is removed by IR-transmissivity. The 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 mirror can be modified for different transmission-, reflectivity- and filter ranges, as well as in regards to the cut-on and cut-off points. Other glass substrates are optionally available. Please use our customized optics inquiry sheet, to conveniently inquire for your individually made cold mirror design. For further information, please use our information questionnaire.
We are not limited to a small standard delivery program with pre-defined dimensions. Our strength is to be just as quick or even quicker with individually sized optics as you might be used to, when you buy stock items. In other words, you can order the cold mirrors at exactly the size you need them, without the disadvantage of a long lead time.
To ask for a quotation for cold mirrors of the SHD series with individual dimensions, please click the button below:
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