Cold light filters picture, Cold mirror
 
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Cold Mirrors

Heat transparent high reflection mirrors, SHD-Series

Special Properties

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

Typical Applications

  • Highly reflecting mirror for the visible spectrum
  • Filter in lighting systems
  • Heat filter applications
  • Mirror for cold light sources
  • Dielectric mirror in sensor technology
  • Dichroic lighting mirror
  • Scanner and bar code reader
  • Lighting Mirror

Cold mirrors, what they are and what they are used for

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 quality optic for an incidence angle of 45°. 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 cold 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.

 

The features of our cold mirrors

Our SHD cold mirrors are coated on temperature resistant glass substrates. Therefore the 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 mirror coating design features an outstanding temperature resistance, and shows a distinguished resistance against moisture and abrasion. If required, our SHD cold mirror can be modified for different transmission- and reflectivity ranges, as well as in regards to the cut-on and cut-off points. Please use our customized coating inquiry sheet, to conveniently inquire your individually made cold mirror. For further information, please use our information questionnaire.

 

How to get them

We are not limited to a small standard delivery program with pre-defined sizes. Our strength is to be just as quick or even quicker with individual dimensions as you might be used to, when you buy stock items. In other words, you can order exactly the cold mirror at the size you need, without the disadvantage of a long lead time.

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


Request for Quotation

Specifications


SHD Cold Mirror reflectivity curve

Reflectivity of SHD cold mirrors

Construction

Substrate

Reflectivity

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

Flatness

  • Depending on mirror substrate material and thickness
  • Other on request

Surface Quality

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

Standard thicknesses

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"