Cold Mirrors

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
• Dielectric multi-layer coating system

Typical Applications

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

Related mirror types

• SIR-Series
  (Dichroic hot mirrors)
• SHR-Series
  (Dielectric front surface mirrors)
• SHP-D Series
  (Highly reflective mirror optics for polarized light)
• SUV-Series
  (UV-cold mirrors)

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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 a high optical transmission for infrared light up to 2500 nm, they are perfectly suited to extract the cool light and to remove thermal energy from a beam path at the same time, while maintaining a high optical imaging quality of the reflected image. We designed the dichroic coating of the SHD mirrors for best efficiency at an angle 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 cold mirrors, 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 mirrors as efficient and economical laser mirrors for visible wavelengths and laser systems.

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

Our company also has the capabilities to produce cold mirrors according to your exacting specifications. On a batch basis, we can modify the layer system of the optics concerning the 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 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:

Get a Quotation

Also available as 48 h Express-Optics

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

 

Specifications

View reflection spectrum of the SHD cold mirrors

 

Construction

• Metal-free 100% dielectric coating layers

Substrate

• Temperature resistant borosilicate glass
• Other substrates possible on demand

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

• 1,10 mm, 1,75 mm, 3,30 mm
  (Click thickness to get a price quote)

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 (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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