Home / Product overview / Front Surface Mirrors / Cold Mirrors, SHD Series

Cold Mirrors

Dielectric heat-transmitting front surface mirrors
SHD Series

Special Properties

  • Very high visible reflection
  • Excellent infrared transmission up to 2500 nm
  • Efficient separation of heat from light
  • Temperature-resistant borosilicate glass substrate
  • Designed for an angle of incidence of 45°
  • Excellent optical characteristics
  • Multi-layer coating

Typical Applications

  • Heat and light separation in lighting systems
  • Sensor technology
  • Dichroic beamsplitter applications
  • High reflection mirrors
  • Medical lighting devices
  • Heat dissipation filters in optical systems
  • Cold light sources
  • Laser mirrors
  • Filters for fiber-optic systems
  • Cost-effective 45° laser mirrors
  • Diode laser applications
  • Laser beam combiners
  • Infrared filter (NIR-IR)
  • VIS-blocking optics

Similar mirror types

Get a Quotation

48h-Express Optics Manufacturing 48-hour express service

Cold mirrors play a crucial role in a wide range of applications requiring precise heat and light control. In the lighting technology field, cold mirrors enhance the desired light output. Cold mirrors protect sensitive objects from potential heat damage by effectively letting infrared radiation escape from the target area. We designed our dichroic SHD cold mirrors to reflect at an angle of 45° and transmit infrared radiation at 0° relative to the incident light beam. The front surface mirrors provide excellent optical reflection for visible wavelengths while transmitting more than 90 % (average) of the infrared light up to 2500 nm. They are ideal for extracting cold visible light from a beam path while removing most thermal energy.

SHD cold mirrors feature high imaging quality. Hence, besides its primary use as a cold mirror, the SHD can merge visible light with infrared light or laser beams. Furthermore, they work as very efficient and cost-effective laser mirrors for visible light. The dielectric construction ensures permanent resistance to thermal load and moisture. Premium-grade borosilicate glass substrates enable the SHD cold mirrors to work at increased operating temperatures.

We also produce customized cold mirror optics and can modify the layer system concerning reflection wavelength, angle of incidence, cut-on, cut-off wavelengths, damage threshold, and spectral operating range of the reflective coatings on a batch basis. If you need custom cold mirror design support, please consider using our inquiry form or email your detailed requirements.

Please click the following button or select a thickness from the table to receive a quotation for our standard SHD cold mirrors with individual dimensions.

Get a Quotation

48h-Express Optics Manufacturing 48-hour express service

If you are interested in other mirror coatings or filters that block or transmit thermal energy or infrared light, please visit the websites of our SIR heat-reflecting hot mirrors and our KG-heat absorbing filters.



Reflectivity of the SHD cold mirrors

SHD reflectivity curve
Enlarge the curve to show details

Stock Thicknesses

Please click on a thickness below to request a quote.

Thickness (mm)


48h-Express Service
1,10 ±0,10
1,75 ±0,20
3,30 ±0,20
Custom thicknesses are available on request.
The thicknesses marked with "" are also available within 48-hour express service.

Optical Reflectivity

  • R > 99 % for single wavelengths
  • Ravg > 97 % at 400 – 690 nm at 45° incidence
  • Tavg > 90 % at 800 – 2500 nm
  • Other wavelength ranges and different angles per inquiry

Coating Construction



  • Depending on the substrate material and thickness

Surface Quality

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

Standard Thicknesses

Adherence and Abrasion Resistance

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

Note: If you are searching for optics with the inverse function principle of the SHD cold mirrors, please visit the datasheet of our SIR-heat reflecting filters (hot mirror optics) for detailed information.

All given details and specifications are mean reference values and are not guaranteed. Also, please consider the "Notes on specifications".

© 1994 – 2023 Präzisions Glas & Optik GmbH

Last update 15.09.2023