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Cold Mirrors

Dielectric heat-transmitting mirror coatings
SHD Series

Special Properties

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

Typical Applications

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

Similar mirror types

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48h-Express Optics Manufacturing 48 h Express-Service available

We designed the dichroic SHD cold mirrors to reflect at an angle of 45° and transmit infrared radiation at 0° relative to the incident light beam. They provide excellent optical reflection for visible wavelengths while transmitting more than 90 % of infrared light up to 2500 nm on average. They are ideal for extracting the cold visible light from the beam path while removing most of the thermal energy.

SHD cold mirrors feature high imaging quality. Hence, besides its primary use as a cold mirror, the SHD can merge visible with infrared light or laser beams. Also, they can work as 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. We 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 support with your customized cold mirror design, please consider using our inquiry form or email your detailed requirements.

Please click on 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 h Express-Service available

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 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 on request.
The thicknesses marked with "" are also available within 48–h 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 search 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".

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Last update 31.05.2023