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

Cold Mirrors

Dichroic heat transmitting 45°-mirrors

SHD Series

Special Properties

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

Typical Applications

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

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

The cold mirrors of our SHD series provide a very high reflection for visible light sources and laser systems. Since the mirrors have a good optical transmission for infrared wavelengths up to 2500 nm, they are excellently suited as filters for the extraction of cool light and at the same time for the removal of thermal radiation from a beam path, while maintaining a high optical imaging quality. The dichroic coating of the mirrors is designed for a reflection angle of 45° and it transmits the infrared radiation at 0° related to the incident light beam.

SHD cold mirrors offer a very good surface quality and are suitable for various optical applications. In addition to the main application as a cold mirror, the SHD optics can also couple visible lasers into infrared laser beams. Besides that, in many cases it is possible to use our standard SHD mirrors as efficient and cost-effective laser mirrors for visible wavelengths and unpolarized laser systems.

The dielectric coating construction of the mirror optics ensures permanent resistance to thermal load and moisture. For the glass substrate of the SHD mirrors we use a premium quality borosilicate glass which enables the optics to be used at high operating temperatures and that offers a good optical quality.

Our company also has the capabilities to produce cold mirrors according to customer's specifications. On a batch basis, the layer systems of the mirror optics can be modified in relation to 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 enquiry form or send an e-mail 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 more lighting filters, please visit the websites of our SIR heat reflecting hot mirrors and of our KG-heat absorbing filters.



SHD 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. In addition please consider the "Notes on specifications"

© 1994 - 2018 Präzisions Glas & Optik GmbH