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FND-2502 - ND Filter NG11 D:0.2 T:63% Ø:25 mm

FND-2502 - ND Filter NG11  D:0.2 T:63% Ø:25 mm
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FND-2502 - ND Filter NG11 D:0.2 T:63% Ø:25 mm
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  • Model: Elliot Scientific FND-2502
£21.53

Neutral Density Filter, Absorptive : FND-2502 ND Filter NG11    

FND-2502 ND Filter NG11   

Performance

Optical Density: 0.2
Transmission: 63%
Thickness: 1.4 mm
Size: Ø 25 mm


Absorptive Schott glass nd filters are used to control the intensity of light and are stackable without resulting in multiple reflections. The nd glass absorbs the light within the filter. Each glass type is polished to required thickness and measured to produce the exact optical density and transmission. Custom sizes or wavelength-specific optical density/transmission can be manufactured upon request. 
 
Specification

 

Material:Schott ® Filter Glass
Dimensions:Ø +0.00/-0.20 mm
Squares ± 0.20 mm
Thickness:± 0.10 mm
Parallelism:Ø 12.5 mm is ≤ 3 Arc min
Ø 25 mm is ≤ 5 Arc min
50x50 mm is ≤ 8 Arc min
Edges:Fine Ground
Flatness:Ø 12.5 mm = 3 Fringes
Ø 25 mm = 5 Fringes
50x50 mm = 8 Fringes
Surfaces:60/40
Optical Density:O.D < 1.0 ± .05 @ 546nm
O.D > 1.0 ± 5% @546nm
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