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Cold Mirrors

Dichroic heat transmitting 45°-mirrors
SHD Series

Special Properties

  • Large reflectivity for visible wavelengths
  • 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
  • Dielectric multi-layer coating system

Typical Applications

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


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48h-Express Manufacturing Also available in 48 h Express-Service

The cold mirrors of our SHD series provide a very high optical reflectivity for visible light sources and laser systems. Since the mirrors also offer high optical transmission for infrared wavelengths up to 2500 nm, they are excellently suited as filters for the extraction of cold light and ´ removal of thermal radiation energy from a beam path, while maintaining a high optical imaging quality in the visible. We designed the dichroic coating of the mirrors for a reflection angle of 45° and for transmission of the infrared radiation at 0° related to the incident light beam.

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

The dielectric coating construction of the optics ensures permanent resistance to thermal load and moisture. The glass substrate of the SHD mirrors is a premium quality borosilicate glass which enables the optics to operate at high temperatures and offers an excellent optical performance.

Our company also has the capabilities to produce cold mirrors according to customer's specifications. On a batch basis, we can modify the layer systems of the mirror optics concerning the reflection-range, 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 custom coated mirrors, please use our coating inquiry form or send an email to request a custom optics quotation.


To request a price quote for our standard SHD cold mirrors with individual dimensions, please click on the following button:

Get a Quotation

If you are interested in other lighting filters, please visit the websites of our SIR heat reflecting hot-mirrors and of our KG-heat absorbing filters.



SHD cold mirrors reflectivity

View reflection spectrum of the SHD mirrors




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 of incidence, customized cut-off and cut-on point per inquiry


  • 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 optics with the inverse function principle of SHD mirrors, please visit the data sheet of our SIR-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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