Cold Mirrors
Dielectric heat-transmitting 45° front surface mirrors
SHD Series
Special Properties
- Very high visible reflectance
- Excellent infrared transmission up to 2500 nm
- Efficient separation of heat and light
- Temperature resistant borosilicate glass substrate
- Designed for 45° angle of incidence
- Excellent optical properties
- Multilayer mirror coating
Typical Applications
- Heat and light separation in lighting systems
- High reflectance mirrors
- Sensor technology
- Dichroic beamsplitter applications
- Medical lighting devices
- Heat rejection filters in optical systems
- 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 optics
Similar Mirror Types
- SIR-Series
(heat reflection mirrors) - SHR-Series
(dielectric optical mirrors) - SHP-D Series
(broadband mirrors optimized for the reflection of polarized light) - SUV-Series
(UV cold mirrors)
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Cold mirrors play a critical role in a wide range of applications that require precise control of heat and light. In lighting applications, cold mirrors protect sensitive objects from potential heat damage by effectively allowing infrared light to escape from the target area. We have designed our SHD dichroic cold mirrors to reflect at an angle of 45° and transmit infrared radiation at 0° relative to the incident light beam. The mirrors provide excellent optical reflectivity for visible wavelengths while transmitting more than 90 % (average) of the infrared light up to 2500 nm. They are ideal for extracting cold visible light from a beam path while removing most of the thermal energy.
SHD cold mirrors reflect with high imaging quality. Therefore, in addition to its primary use as a cold mirror, the SHD can be used to combine visible light with infrared light or laser beams. In addition, they function as highly efficient and cost-effective laser mirrors in the visible. The dielectric mirror construction ensures permanent resistance to thermal stress and moisture. High-quality borosilicate glass substrates allow the SHD cold mirrors to operate at elevated temperatures.
We also manufacture customized cold mirror optics and can modify the layer construction in terms of reflection wavelength, angle of incidence, cut-on, 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 or below or select a thickness from the table to receive a quotation for our standard SHD cold mirrors with custom dimensions.
Get a Quotation
48-hour express service
If you are interested in other mirror coatings or filters that block or transmit thermal energy or infrared light, please visit the web pages of our heat reflecting SIR mirrors and KG heat absorbing filters.
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. | ||
| Thicknesses marked with "✔" are also available in our 48-hour express service. | ||
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 borosilicate glass
- 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 (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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Last update: April 17, 2024