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Cold Mirrors

Dichroic heat transmitting coating
SHD Series

Special Properties

  • High 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

  • Heat transmitting cold mirrors
  • Infrared transmitting optics in lighting systems (NIR-IR)
  • High reflection mirrors
  • Plane lighting filters with optical function
  • Optics for sensor technology
  • Cold light sources
  • Dichroic beamsplitters
  • Medical lighting optics
  • Cost-effective 45° laser front surface mirror optics
  • Efficient reflector for diode laser applications
  • VIS-blocking optics

Related mirror types

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

Our SHD cold mirror optics offer 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 and unpolarized laser systems.

The dielectric coating construction of the SHD optics ensures permanent resistance to thermal load and moisture. The glass substrate we use is a premium grade borosilicate glass which enables the SHD to operate at high temperatures and that 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 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 your custom coating design, please use our inquiry form or send an email to request any kind of custom optics.

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

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

 

Specifications

SHD reflectivity curve

View reflection spectrum of the SHD cold mirrors

 

Construction

Substrate

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

Flatness

  • 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 the SHD, please visit the data sheet of our SIR-heat reflection filters 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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