The FSR-KG2-C Heat Absorbing Glass Filter is a 25.4 mm diameter infrared (IR) cut-off filter made of KG2 filter glass and coated for better resistance to humid environments. Heat absorbing glass filters reduce the heat transmitted through an optical system. They have high transmission in the visible wavelength region and absorb in the IR wavelength region, making them also useful as a shortpass filter. These absorption filters are precision polished for demanding research or OEM applications.
Технические характеристики
- Type Heat Absorbing Filter
- Material Schott KG2 or equivalent
- Center Wavelength VIS
- Coating Type SiO2
- Angle of Incidence 0°
- Size Ø25.4 mm
- Size Tolerance ±0.3 mm
- Thickness 3 mm
- Thickness Tolerance ±0.1 mm
- Surface Flatness ≤1λ at 632.8 nm over the clear aperture
- Surface Quality 60-40 scratch-dig
- Damage Threshold 30 W/cm2 CW, Typical
- Wedge ≤3 arc min
- Clear Aperture central ≥ 80% of diameter
- Chamfers Up to 1 mm face width
- Chamfers Angle Tolerance 45° ±15°
- Cleaning See How to Clean Optics
