The FSQ-OD50 Absorptive Neutral Density Filter is a 2 x 2 inch (50.8 x 50.8 mm) square absorptive neutral density filter that has an Optical Density of 0.5 at 546.1 nm, and provides broadband attenuation for the visible to near-infrared region. This filter is precision polished for demanding research or OEM applications. The filters Optical Density is permanently marked on the filter and is shipped with a transmission curve.
Технические характеристики
- Size 50.8 x 50.8 mm
- Wavelength Range 400-900 nm
- Optical Density 0.5
- Optical Density Tolerance ±4&percnt, @ 546.1 nm
- Transmission 31.6% @ 546.1 nm
- Angle of Incidence 0°
- Damage Threshold 1-5 W/cm2 CW, typical
- Size Tolerance ±0.3 mm
- Thickness 0.99-4.19 mm
- Surface Flatness &le,4&lambda, at 632.8 nm over the clear aperture
- Surface Quality 60-40 scratch-dig
- Clear Aperture &ge,central 80% of dimensions
- Wedge &le,3 arc min
- Chamfers 0.25–0.76 mm face width
- Chamfers Angle Tolerance 45° ±15°
- Cleaning See How to Clean Optics
