IR NEUTRAL DENSITY FILTERS

Metallic-coated infrared neutral density filters (IR ND filters) obtain their optical density from a metal alloy coating on a substrate determined by the wavelength region of interest. Unlike the all- dielectric or absorption type, the metallic type ND filter employs a combination of absorption and reflection to reduce the intensity of light.

Andover's IR ND filters exhibit outstanding spectral neutrality, outperforming all others on the market.

We also have a new variant available for select densities which includes a broadband antireflective coating on one side. This is useful in imaging systems where multiple reflections from the coated surfaces could be a concern. Look for BBAR in the part number.

General Specifications:
Dimensional Tolerances: ±0.2mm
Thickness:  1.0mm
Min. Clear Aperture:  90% of outside dimension
Surface Quality:  80/50 per MIL-O-13830B
Coating Quality:  80/50 per MIL-O-13830B
Coating Adherence:  Per MIL-M-13508C
Humidity:  Per MIL-STD-810F
Substrate Material:  Germanium
Flatness:  3–5 waves per 25mm
Parallelism:  10 arc minutes or better
Mechanical: Unmounted
 

Note: Custom sizes and spectral characteristics available on request. Contact our technical sales department for a quotation.

DESCRIPTION
PART NO.
1 - 5 pcs.
> 5 pcs.
QTY In Stock
Buy
Standard IR ND Filter, OD=0.3, 12.5mm diameter
030FNIR-12.5
$138.00
$117.00
8
DescriptionStandard IR ND Filter, OD=0.3, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.3, 25mm diameter
030FNIR-25
$276.00
$235.00
50
DescriptionStandard IR ND Filter, OD=0.3, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.3, 50mm diameter
030FNIR-50
$570.00
$485.00
5
DescriptionStandard IR ND Filter, OD=0.3, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Custom IR ND Filter, OD=0.3, with A/R 25mm diameter
030FNIR-BBAR-25
$336.00
$286.00
8
DescriptionCustom IR ND Filter, OD=0.3, with A/R 25mm diameter
QuantityPrice
1 - 5 pcs.$336.00
> 5 pcs.$286.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.5, 12.5mm diameter
050FNIR-12.5
$138.00
$117.00
4
DescriptionStandard IR ND Filter, OD=0.5, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.5, 25mm diameter
050FNIR-25
$276.00
$235.00
3
DescriptionStandard IR ND Filter, OD=0.5, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.5, 50mm diameter
050FNIR-50
$570.00
$485.00
5
DescriptionStandard IR ND Filter, OD=0.5, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Custom IR ND Filter, OD=0.5, with A/R 25mm diameter
050FNIR-BBAR-25
$336.00
$286.00
0
DescriptionCustom IR ND Filter, OD=0.5, with A/R 25mm diameter
QuantityPrice
1 - 5 pcs.$336.00
> 5 pcs.$286.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.6, 12.5mm diameter
060FNIR-12.5
$138.00
$117.00
5
DescriptionStandard IR ND Filter, OD=0.6, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.6, 25mm diameter
060FNIR-25
$276.00
$235.00
9
DescriptionStandard IR ND Filter, OD=0.6, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.6, 50mm diameter
060FNIR-50
$570.00
$485.00
4
DescriptionStandard IR ND Filter, OD=0.6, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.7, 12.5mm diameter
070FNIR-12.5
$138.00
$117.00
3
DescriptionStandard IR ND Filter, OD=0.7, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.7, 25mm diameter
070FNIR-25
$276.00
$235.00
10
DescriptionStandard IR ND Filter, OD=0.7, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.7, 50mm diameter
070FNIR-50
$570.00
$485.00
2
DescriptionStandard IR ND Filter, OD=0.7, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.8, 12.5mm diameter
080FNIR-12.5
$138.00
$117.00
2
DescriptionStandard IR ND Filter, OD=0.8, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.8, 25mm diameter
080FNIR-25
$276.00
$235.00
26
DescriptionStandard IR ND Filter, OD=0.8, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.8, 50mm diameter
080FNIR-50
$570.00
$485.00
9
DescriptionStandard IR ND Filter, OD=0.8, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.9, 12.5mm diameter
090FNIR-12.5
$138.00
$117.00
4
DescriptionStandard IR ND Filter, OD=0.9, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.9, 25mm diameter
090FNIR-25
$276.00
$235.00
8
DescriptionStandard IR ND Filter, OD=0.9, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=0.9, 50mm diameter
090FNIR-50
$570.00
$485.00
2
DescriptionStandard IR ND Filter, OD=0.9, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.0, 12.5mm diameter
100FNIR-12.5
$138.00
$117.00
4
DescriptionStandard IR ND Filter, OD=1.0, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.0, 25mm diameter
100FNIR-25
$276.00
$235.00
0
DescriptionStandard IR ND Filter, OD=1.0, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.0, 50mm diameter
100FNIR-50
$570.00
$485.00
9
DescriptionStandard IR ND Filter, OD=1.0, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Custom IR ND Filter, OD=1.0,with A/R 25mm diameter.
100FNIR-BBAR-25
$336.00
$286.00
5
DescriptionCustom IR ND Filter, OD=1.0,with A/R 25mm diameter.
QuantityPrice
1 - 5 pcs.$336.00
> 5 pcs.$286.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.3, 12.5mm diameter
130FNIR-12.5
$138.00
$117.00
0
DescriptionStandard IR ND Filter, OD=1.3, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.3, 25mm diameter
130FNIR-25
$276.00
$235.00
6
DescriptionStandard IR ND Filter, OD=1.3, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.3, 50mm diameter
130FNIR-50
$570.00
$485.00
10
DescriptionStandard IR ND Filter, OD=1.3, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.5, 12.5mm diameter
150FNIR-12.5
$138.00
$117.00
1
DescriptionStandard IR ND Filter, OD=1.5, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.5, 25mm diameter
150FNIR-25
$276.00
$235.00
14
DescriptionStandard IR ND Filter, OD=1.5, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=1.5, 50mm diameter
150FNIR-50
$570.00
$485.00
9
DescriptionStandard IR ND Filter, OD=1.5, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Custom IR ND Filter, OD=1.5, with A/R 25mm diameter
150FNIR-BBAR-25
$336.00
$286.00
0
DescriptionCustom IR ND Filter, OD=1.5, with A/R 25mm diameter
QuantityPrice
1 - 5 pcs.$336.00
> 5 pcs.$286.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=2.0, 12.5mm diameter
200FNIR-12.5
$138.00
$117.00
8
DescriptionStandard IR ND Filter, OD=2.0, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=2.0, 25mm diameter
200FNIR-25
$276.00
$235.00
35
DescriptionStandard IR ND Filter, OD=2.0, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=2.0, 50mm diameter
200FNIR-50
$570.00
$485.00
2
DescriptionStandard IR ND Filter, OD=2.0, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Custom IR ND Filter, OD=2.0,with A/R 25mm diameter
200FNIR-BBAR-25
$336.00
$286.00
0
DescriptionCustom IR ND Filter, OD=2.0,with A/R 25mm diameter
QuantityPrice
1 - 5 pcs.$336.00
> 5 pcs.$286.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=2.5, 12.5mm diameter
250FNIR-12.5
$138.00
$117.00
6
DescriptionStandard IR ND Filter, OD=2.5, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=2.5, 25mm diameter
250FNIR-25
$276.00
$235.00
15
DescriptionStandard IR ND Filter, OD=2.5, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=2.5, 50mm diameter
250FNIR-50
$570.00
$485.00
2
DescriptionStandard IR ND Filter, OD=2.5, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=3.0, 12.5mm diameter
300FNIR-12.5
$138.00
$117.00
0
DescriptionStandard IR ND Filter, OD=3.0, 12.5mm diameter
QuantityPrice
1 - 5 pcs.$138.00
> 5 pcs.$117.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=3.0, 25mm diameter
300FNIR-25
$276.00
$235.00
2
DescriptionStandard IR ND Filter, OD=3.0, 25mm diameter
QuantityPrice
1 - 5 pcs.$276.00
> 5 pcs.$235.00

Estimated Delivery: 2-3 Days
Standard IR ND Filter, OD=3.0, 50mm diameter
300FNIR-50
$570.00
$485.00
5
DescriptionStandard IR ND Filter, OD=3.0, 50mm diameter
QuantityPrice
1 - 5 pcs.$570.00
> 5 pcs.$485.00

Estimated Delivery: 2-3 Days
Custom IR ND Filter, OD=3.0, with A/R 25mm diameter
300FNIR-BBAR-25
$336.00
$286.00
0
DescriptionCustom IR ND Filter, OD=3.0, with A/R 25mm diameter
QuantityPrice
1 - 5 pcs.$336.00
> 5 pcs.$286.00

Estimated Delivery: 2-3 Days