High Performance Hot Mirror
Unlike absorptive heat-resistant glass filters, dielectric hot mirrors feature minimal thermal energy absorption. They transmit visible wavelengths while blocking or reflecting near-infrared radiation that could compromise system performance, making them ideal for high-power illumination systems. Thanks to their specialized coating design, they also function effectively as infrared cut-off filters. Hot mirrors are well suited for a variety of spectral detection applications, including suppressing near-infrared interference to CCD and silicon-based detectors.
Crafted from premium heat-resistant borosilicate glass, our cold and hot mirrors feature high-performance multilayer dielectric coatings. Hot mirrors deliver high visible transmittance and efficient infrared reflection, while cold mirrors provide high infrared transmittance and strong visible reflection. Hot mirrors effectively dissipate heat and minimize thermal impact on system performance. For high-power illumination setups, supplementary air cooling is recommended.
Parameters
| Material | Borosilicate glass BorofloatTM |
| Surface Accuracy | ＜5λ/25mm2@633 nm |
| Parallelism | ＜1 arcmin |
| Surface Quality | 60-40 |
| Diameter Tolerance of Circular Substrate | + 0.0/ -0.25 mm |
| Tolerance of Square(rectangular) substrate | ± 0.25 mm (Edge Cutting) |
| Thickness Tolerance | 0.2 mm |
| Transmission | Tavg ＞90%@425~675 nm |
| Reflection | Ravg ＞95%@750~1150 nm |
| Angle of Incidence | 0° |
Model
| Size, mm | Thickness, mm | Visible Transmittance | Infrared Reflectance |
| Φ12.5/25.0/50.0 | 1.1 | Tavg > 90%@425~675 nm | Ravg > 95%@750~1150 nm |
| Φ12.5/25.0/50.0 | 2 | ||
| Square: 12.5 x 12.5 25 x 25 35 x 35 50 x 50 30 x 80 110 x 120 | 1.1 | ||
| 2 |