The 20CMS-45 Cold Mirror is a 50.8 x 50.8 mm square 45° mirror used as a heat control filter. Our cold mirrors are heat-transmitting longpass filters designed to reflect 400-700 nm visible wavelengths while transmitting 780-2500 nm near-infrared wavelengths. These filters can be used to remove heat from an optical system.
Технические характеристики
- Type Cold Mirror
- Optic Size 50.8 x 50.8 mm
- Transmittance Range 780-2500 nm
- Transmission Tavg≥85% 780-850 nm, Tavg≥80% 850-2500 nm
- Reflectance Band 400-700 nm
- Reflectance Ravg≥95%
- Angle of Incidence 45° ±5°
- Material Borofloat® borosilicate float glass
- Surface Quality 80-50 scratch-dig
- Surface Flatness 6–8λ per 25.4 mm at 546.1 nm over the clear aperture
- Thickness 3.3 mm
- Thickness Tolerance ±0.2 mm
- Size Tolerance ±0.4 mm
- Clear Aperture ≥central 90% of dimensions
- Temperature Range -100 to 500°C
- Cleaning See How to Clean Optics
