| At 45° incidence, Cold Mirrors reflect the visible spectrum of light and transmit the near infra-red, which contains the thermal energy i.e. Heat. Cold Mirrors are therefore another excellent alternative for transmitting the near infra-red spectrum. Cold Mirrors have a sharpe cut off between IR and Visible because they have a dielectric coating that can be controlled. Cold Mirrors are often used with tungsten lamps which are the source in a projector or lighting system. As well as stocking 45° Cold Mirrors, we also have large sheets of 0° Cold Mirror available that can be cut to custom sizes at short notice. Specifications: | Reflectance (45°)*: | > 90% (average over 425-650nm) | | Transmittance (45°)*: | > 85% (average over 800-1200nm) | | Material data : | LEGB float | | Diameter: | +0.0 / -0.2 mm | | Length/width: | ± 0.2 mm | | Thickness: | ± 0.25 mm | | Surface quality: | <60-40 scratch/dig | | Flatness: | < average 5λ over 25mm (sheeted material) | | Parallelism: | < average 10 arcmin (not guaranteed) | * Average over wavelength regions stated. Coating Specification Transmittance (45°) >90% average over 425-650nm Reflectance (45°) >85% average over 800-1200nm Cold Mirror (45°) Options available >> Cutting down or edged to special shapes and sizes >> Special sizes >> Mounting (circles) | 
Cold Mirrors (45°)
