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Cold Mirrors

Dichroic heat transmitting front surface mirrors
SHD Series

Special Properties

  • Very high reflectivity for visible light
  • Broadband infrared transmittance up to 2500 nm
  • Very efficient heat/light separation
  • Temperature resistant borosilicate glass substrate
  • Designed for an angle of incidence of 45°
  • Increased operating temperature range
  • Excellent optical characteristics
  • Based on a dielectric multi-layer coating system

Typical Applications

  • Cold mirrors in lighting systems
  • High reflection front surface mirrors
  • Plane lighting filters with optical function
  • Mirrors for sensor technology
  • Dichroic beamsplitters
  • Medical lighting optics
  • Heat control in optical systems
  • Cold light sources
  • Cost-effective 45° laser mirrors
  • Efficient mirrors for diode laser applications
  • VIS-blocking optics

Related mirror types

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48h-Express Optics Manufacturing Also available as 48 h Express-Optics

Cold mirrors of our SHD series provide an excellent optical reflectivity for visible light sources. Since the mirrors also offer high optical transmission for infrared light up to 2500 nm, they are ideally suited to extract the cold light and to remove thermal energy from a beam path at the same time, while maintaining high optical imaging quality of the reflected image. We designed the dichroic coating of the SHD cold mirrors for maximum efficiency at an angle of 45° and the best possible transmission of infrared radiation at 0° related to the incident light beam.

Our SHD cold mirrors have a high surface quality and are suitable for various optical applications. In addition to the primary application as a cold mirror, the dichroic optics can also be used to merge visible lasers with infrared laser beams. Besides that, in many cases, it is possible to use our standard SHD as an efficient and cost-effective laser mirror for visible wavelengths.

The dielectric thin-film construction of the SHD cold mirrors ensures permanent resistance of the optics to thermal load and moisture. The glass substrate we use is premium grade borosilicate glass that enables the SHD mirrors to operate at high temperatures and offers excellent optical quality.

Our company also can produce cold mirrors according to your exacting specifications. On a batch basis, we can modify the layer system concerning reflection-area, angle of incidence, the cut-on, and cut-off wavelengths, damage threshold, as well as to the spectral operating range. In case you need help with your custom cold mirror design, please use our inquiry form or send an email to request your custom optics.

To receive a price quote for our standard SHD cold mirrors with individual dimensions, please click on the following button or select a thickness from the table.

Get a Quotation

48h-Express Optics Manufacturing Also available as 48 h Express-Optics

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 mirror

SHD reflectivity curve
Enlarge curve to show details

Standard Thicknesses

(Please click on a glass thickness 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 i = 45°
  • Tavg > 85% at 800 - 2500 nm
  • Other wavelength range, different angles, customized cut-off and cut-on point per inquiry

Coating Construction



  • Depending on 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 looking for mirrors with the inverse function principle of the SHD cold mirrors, please visit the datasheet of our SIR-heat reflecting filters (hot mirrors) 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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