The 25FS02DV.2 is a circular variable metallic neutral density filter, made of UV grade Fused Silica, 25 mm in diameter, and coated for an OD range of 0-2.0.
Newports Circular Variable Neutral Density Filter is designed to attenuate the wide spectrum of low energy laser light from UV to near IR wavelength. The optical density gradient varies from 01.0, 0-2.0 and 0-4.0 around a by simply rotating the filter from 0 to 270 degrees. Fused silica substrate for these ND filters allows the transparency from 250-2500 nm range. The linear change in optical density is achieved by fine Inconel coating that allows the controlled linear attenuation of light beam in the designated optical density range for wide spectrum of light.
Технические характеристики
- Size Ø25.0 mm
- Wavelength Range 250-2500 nm
- Optical Density 0 — 2
- Material Fused silica
- Size Tolerance +0/-0.3 mm
- Thickness 2.0 mm
- Thickness Tolerance ±0.25 mm
- Surface Flatness 2λ
- Surface Quality 80-50 scratch-dig
- Clear Aperture &ge,central 92% of dimensions
- Wedge &le, 20 arc sec
- Chamfers 0.2-0.3 mm face width
- Chamfers Angle Tolerance 45° ±15°
- Durability Metalized area MIL-M-13508C, AR coated area MIL-C-675, moderate abrasion
- Inside Diameter 7.5 mm
- Cleaning See How to Clean Optics
