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* To be the global number one choice for quality precision optical components.
* To provide high quality optical solutions to customer requirements on time and at competitive prices.
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Neutral Density Filters - Metallic Type - Visible/IR-Grade - 25 mm Diameter

Our Metallic Neutral Density (ND) filters are comprised of a thin layer of nickel-chromium alloy, vacuum-deposited on a glass substrate and attenuate light through reflection. This gives outstanding neutrality and very accurate attenuation across the surface. These filters can also be used as beam splitters as half of the discarded light is absorbed and the rest reflected. The visible/IR range of Metallic ND filters are on low-expansion borosilicate glass substrates and covers the range 350-2500nm. All of our filters are supplied with a transmittance scan taken from a filter on the same production run. The below listed filters are circular filters with a diameter of 25mm.   Specifications: Material: UV fused silica Optical Density : @550nm Diameter: +0.0 / -0.2 mm Length / width: ± 0.2 mm Thickness: ± 0.1 mm Surface quality: <60-40 scratch/dig   Options available >> Cutting down or edged to special shapes and sizes >> Mounting (25mm dia only) See Also: Neutral density filters - Glass type Neutral density filters - Gelatin type Knight Optical offer a complete set of 13 filters See product code: FNM0100 (below)

	Part No.	Density @550nm	Trans (%)	Thickness (mm)	Material	Price (Ex.VAT)	Buy Now	Get Quote
	FNM0100	SET OF 13 Filters	NA	NA	NA	£198.72	QTY:	Quote Me
	FNM00325	0.03*	93	2	LEGB	£8.40	QTY:	Quote Me
	FNM0125	0.1 ±0.015	79	2	LEGB	£17.70	QTY:	Quote Me
	FNM0225	0.2 ±5%	63	2	LEGB	£17.70	QTY:	Quote Me
	FNM0325	0.3 ±5%	50	2	LEGB	£17.70	QTY:	Quote Me
	FNM0425	0.4 ±5%	40	2	LEGB	£17.70	QTY:	Quote Me
	FNM0525	0.5 ±5%	32	2	LEGB	£17.70	QTY:	Quote Me
	FNM0625	0.6 ±5%	25	2	LEGB	£17.70	QTY:	Quote Me
	FNM0725	0.7 ±5%	19	2	LEGB	£17.70	QTY:	Quote Me
	FNM0825	0.8 ±5%	16	2	LEGB	£17.70	QTY:	Quote Me
	FNM1025	1.0 ±5%	10	2	LEGB	£17.70	QTY:	Quote Me
	FNM1525	1.5 ±5%	3.2	2	LEGB	£17.70	QTY:	Quote Me
	FNM2025	2.0 ±5%	1	2	LEGB	£17.70	QTY:	Quote Me
	FNM3025	3.0 ±5%	0.1	2	LEGB	£17.70	QTY:	Quote Me