The FSR-U340 Visible Absorbing Filter is a 25.4 mm diameter dark glass optical filter that passes UV and absorbs visible wavelengths made of Hoya U-340 filter glass. These filters are precision polished for demanding research or OEM applications and are ideal for extraction of UV wavelengths.
Технические характеристики
- Type Visible Absorbing Filter
- Material Hoya U340 or equivalent
- Center Wavelength 340 nm
- Angle of Incidence 0°
- Size Ø25.4 mm
- Size Tolerance ±0.3 mm
- Thickness 2.0 to 3.0 mm, typical
- Surface Flatness &le,1&lambda, at 632.8 nm over the clear aperture
- Surface Quality 60-40 scratch-dig
- Damage Threshold 30 W/cm2 CW, Typical
- Wedge &le,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
