Optical filters picture, Cold mirror
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Cold Mirrors

Heat transparent high reflection mirrors, SHD-Series

Special Properties

  • Very high visible reflectivity
  • Excellent optical characteristics
  • Broadband infrared transmission (up to 2.500nm)
  • High operating temperature
  • Very effective separation of infrared energy
  • Good mechanical stability

Typical Applications

  • Cold Mirror filters in lighting systems
  • Highly reflecting mirror for visible wavelengths
  • Heat filter applications
  • Filters for cold light sources
  • Dielectric mirror in sensor technology
  • Dichroic lighting filter
  • Scanner and bar code readers
  • Lighting Mirror

Cold mirrors work the opposite way a dichroic hot mirror filter works. A hot mirror is designed for maximum transmission in the visible and maximum reflectivity in the infrared, whereas cold mirrors are optimized for maximum reflectivity of the visible wavelengths and best possible transmittance in the infrared light range (heat). Our SHD mirror series are flat, dielectric front surface mirrors, used in applications that require a very strong reflectivity in the visible range and an excellent optical quality.At the same time, a dichroic mirror system very effectively filters most of the infrared energy from a light source up to approximately 2500nm, resulting in a cool reflected light beam. This very broadband transmissivity for infrared light is an advantage over hot mirrors in regards to efficiency when it is critical to remove the hot light from a system, because the IR-reflectivity wavelength range of hot mirrors for physical reasons is more narrow band. Our SHD cold mirrors are coated on temperature resistant glass substrates. Therefore our cold mirrors are an excellent choice for very efficient heat-light separation systems, because most of the IR-energy is removed by IR-transmissivity. The multilayer coating design features an outstanding temperature resistance, and shows a distinguished resistance against moisture and abrasion. If required, our SHD mirrors can be modified for different transmission- and reflectivity ranges, as well as in regards to the cut-on and cut-off wavelengths. Please use our customized coating inquiry sheet, to conveniently inquire your custom made cold mirror. For further information, please use our information inquiry questionnaire.


To ask for a quotation for a cold mirror of the SHD series with individual dimensions, please click the button below:

RFQ cold mirror quotation


SHD Cold Mirror reflectivity curve

Reflectivity of SHD cold mirrors




  • R > 99% for single wavelengths
  • Ravg > 97% at 400-690nm at angle of incidence 45°
  • Other wavelength ranges or custom specific
    cut-off and cut-on points or angle on request


  • Depending on substrate material and thickness
  • Other on request

Surface Quality

  • typ. 80-50 scratch & dig (MIL-0-13830A)
  • Other on request

Standard thicknesses

  • 1,1mm, 1,75mm, 3,3mm

Other Specifications

  • Adherence according to MIL-C-675 C (tape test)
  • Abrasion resistant according to MIL-M-13508 C

All given details and specifications are mean reference values and are not guaranteed. In addition, please consider our "Notes on specifications"