FND-2520 - ND Filter NG4 D:2.0 T:1% Ø:25 mm

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Tags: Neutral Density , Filter , Absorptive

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Model: Elliot Scientific FND-2520

£24.53

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Description
Documents

Neutral Density Filter, Absorptive : FND-2520 ND Filter NG4

FND-2520 ND Filter NG4

Performance

Optical Density: 2.0

Transmission: 1%

Thickness: 3.8 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