Cold Mirrors
Dielectric heat-transmitting 45° front surface mirrors
SHD Series
Special Properties
- Very high visible reflectance
- Efficient separation of heat and light
- High infrared transmission up to 2500 nm
- Excellent optical properties and imaging quality
- Temperature-resistant BOROFLOAT® substrate
- Designed for a 45° angle of incidence
- Multilayer mirror coating
Typical Applications
- Heat and light separation in lighting systems
- High-reflectance mirrors
- IR rejection filters in optical systems
- Sensor technology
- Dichroic beamsplitter
- Medical lighting devices
- Mirrors for cold light sources
- Laser mirrors
- Filters for fiber optic systems
- Low-cost 45° laser mirrors
- Laser diode applications
- Laser beam combiners
- Infrared filters (NIR-IR)
- VIS blocking filters
Similar Mirror Types
- SIR-Series
(hot mirrors) - SHR-Series
(dielectric optical mirrors) - SHP-D Series
(broadband mirrors optimized for polarized light reflection) - SUV-Series
(UV cold mirrors)
Cold mirrors play a critical role in a wide range of applications requiring precise heat and light control. In lighting use cases, cold mirrors protect sensitive objects from potential heat damage by allowing infrared light to escape from the target area.
We have designed our dichroic SHD cold mirrors to reflect at an incidence angle of 45° (90° deflection) and transmit infrared radiation at an angle of 0° relative to the incident light beam. They provide excellent optical reflectivity for visible light while transmitting more than 90% (average) of the infrared wavelengths up to 2500 nm. The SHD is ideal for extracting cold visible light from a beam path while removing most of the thermal energy and maintaining a high imaging quality. In addition to its primary use as a cold mirror, the SHD can also be used to combine visible light with infrared light or laser beams. It also functions as a highly efficient and cost-effective laser mirror in the visible. Its dielectric mirror construction ensures permanent resistance to thermal stress and moisture. High-quality BOROFLOAT® substrates allow the SHD cold mirrors to operate at elevated temperatures.
Furthermore, we manufacture customized cold mirror optics and can modify the layer design in terms of reflection wavelength, angle of incidence, cut-on and cut-off wavelengths, damage threshold, and spectral operating range of the reflective coatings on a batch basis. If you need assistance with your individual cold mirror design, please use our inquiry form to let us know your detailed requirements.
Please click the button below or select a thickness from the table to receive a quotation for our standard SHD cold mirrors with custom dimensions.
If you are interested in other mirror coatings or filters that control thermal energy or infrared light, please visit our SIR mirrors and KG heat-absorbing filter web pages.
Specifications
Reflectivity of the SHD cold mirrors
Enlarge the curve to show details
Stock Thicknesses
Click on the thicknesses below to start an inquiry:Thickness (mm) |
Tolerance |
 |
|---|---|---|
| 1.10 | ±0.10 | ✔ |
| 1.75 | ±0.20 | ✔ |
| 3.30 | ±0.20 | ✔ |
| Custom thicknesses are available on request. | ||
Optical Reflectivity and Transmission
- R > 99% for single wavelengths
- Ravg > 97% at 400 – 690 nm at 45°
- Tavg > 90% at 800 – 2500 nm
- Other wavelength ranges and different incidence angles per inquiry
Construction
- Metal-free, 100% dielectric layers
Substrate
- Temperature resistant BOROFLOAT®
- Other substrates are possible on demand
Flatness
- Depending on the 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 searching for optics with the inverse function principle of the SHD cold mirrors, please refer to our SIR heat-reflecting filters for detailed information.
All data and specifications given are average guide values and are not guaranteed. Moreover, please consider the “Notes on Specifications”.
© 1994 – 2024 Präzisions Glas & Optik GmbH
Last update: December 11, 2024