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.

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 QTY
+ IR ND, 0.30 OD, 12.5 mm diameter 030FNIR-12.5 $138 $117 11
Description Standard IR ND Filter, OD=0.3, 12.5mm diameter
CSV File (typical) 030FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.30 OD, 25.0 mm diameter 030FNIR-25 $276 $235 20
Description Standard IR ND Filter, OD=0.3, 25mm diameter
CSV File (typical) 030FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.30 OD, 50.0 mm diameter 030FNIR-50 $570 $485 7
Description Standard IR ND Filter, OD=0.3, 50mm diameter
CSV File (typical) 030FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.30 OD, 25.0 mm diameter 030FNIR-BBAR-25 $336 $286 8
Description Custom IR ND Filter, OD=0.3, with A/R 25mm diameter
Graph Test
QtyPrice
1-5 $336
6+ $286
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.50 OD, 12.5 mm diameter 050FNIR-12.5 $138 $117 4
Description Standard IR ND Filter, OD=0.5, 12.5mm diameter
CSV File (typical) 050FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.50 OD, 25.0 mm diameter 050FNIR-25 $276 $235 7
Description Standard IR ND Filter, OD=0.5, 25mm diameter
CSV File (typical) 050FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.50 OD, 50.0 mm diameter 050FNIR-50 $570 $485 6
Description Standard IR ND Filter, OD=0.5, 50mm diameter
CSV File (typical) 050FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.50 OD, 25.0 mm diameter 050FNIR-BBAR-25 $336 $286 0
Description Custom IR ND Filter, OD=0.5, with A/R 25mm diameter
Graph Test
QtyPrice
1-5 $336
6+ $286
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.60 OD, 12.5 mm diameter 060FNIR-12.5 $138 $117 6
Description Standard IR ND Filter, OD=0.6, 12.5mm diameter
CSV File (typical) 060FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.60 OD, 25.0 mm diameter 060FNIR-25 $276 $235 13
Description Standard IR ND Filter, OD=0.6, 25mm diameter
CSV File (typical) 060FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.60 OD, 50.0 mm diameter 060FNIR-50 $570 $485 6
Description Standard IR ND Filter, OD=0.6, 50mm diameter
CSV File (typical) 060FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.70 OD, 12.5 mm diameter 070FNIR-12.5 $138 $117 3
Description Standard IR ND Filter, OD=0.7, 12.5mm diameter
CSV File (typical) 070FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.70 OD, 25.0 mm diameter 070FNIR-25 $276 $235 14
Description Standard IR ND Filter, OD=0.7, 25mm diameter
CSV File (typical) 070FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.70 OD, 50.0 mm diameter 070FNIR-50 $570 $485 2
Description Standard IR ND Filter, OD=0.7, 50mm diameter
CSV File (typical) 070FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.80 OD, 12.5 mm diameter 080FNIR-12.5 $138 $117 2
Description Standard IR ND Filter, OD=0.8, 12.5mm diameter
CSV File (typical) 080FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.80 OD, 25.0 mm diameter 080FNIR-25 $276 $235 30
Description Standard IR ND Filter, OD=0.8, 25mm diameter
CSV File (typical) 080FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.80 OD, 50.0 mm diameter 080FNIR-50 $570 $485 9
Description Standard IR ND Filter, OD=0.8, 50mm diameter
CSV File (typical) 080FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.9 OD, 12.5 mm diameter 090FNIR-12.5 $138 $117 4
Description Standard IR ND Filter, OD=0.9, 12.5mm diameter
CSV File (typical) 090FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.9 OD, 25.0 mm diameter 090FNIR-25 $276 $235 12
Description Standard IR ND Filter, OD=0.9, 25mm diameter
CSV File (typical) 090FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 0.9 OD, 50.0 mm diameter 090FNIR-50 $570 $485 2
Description Standard IR ND Filter, OD=0.9, 50mm diameter
CSV File (typical) 090FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.0 OD, 12.5 mm diameter 100FNIR-12.5 $138 $117 5
Description Standard IR ND Filter, OD=1.0, 12.5mm diameter
CSV File (typical) 100FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.0 OD, 25.0 mm diameter 100FNIR-25 $276 $235 24
Description Standard IR ND Filter, OD=1.0, 25mm diameter
CSV File (typical) 100FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.0 OD, 50.0 mm diameter 100FNIR-50 $570 $485 11
Description Standard IR ND Filter, OD=1.0, 50mm diameter
CSV File (typical) 100FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.0 OD, 25.0 mm diameter 100FNIR-BBAR-25 $336 $286 7
Description Custom IR ND Filter, OD=1.0,with A/R 25mm diameter.
Graph Test
QtyPrice
1-5 $336
6+ $286
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.3 OD, 12.5 mm diameter 130FNIR-12.5 $138 $117 0
Description Standard IR ND Filter, OD=1.3, 12.5mm diameter
CSV File (typical) 130FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.3 OD, 25.0 mm diameter 130FNIR-25 $276 $235 11
Description Standard IR ND Filter, OD=1.3, 25mm diameter
CSV File (typical) 130FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.3 OD, 50.0 mm diameter 130FNIR-50 $570 $485 13
Description Standard IR ND Filter, OD=1.3, 50mm diameter
CSV File (typical) 130FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.5 OD, 12.5 mm diameter 150FNIR-12.5 $138 $117 1
Description Standard IR ND Filter, OD=1.5, 12.5mm diameter
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.5 OD, 25.0 mm diameter 150FNIR-25 $276 $235 18
Description Standard IR ND Filter, OD=1.5, 25mm diameter
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.5 OD, 50.0 mm diameter 150FNIR-50 $570 $485 9
Description Standard IR ND Filter, OD=1.5, 50mm diameter
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.5 OD, 25.0 mm diameter 150FNIR-BBAR-25 $336 $286 0
Description Custom IR ND Filter, OD=1.5, with A/R 25mm diameter
Graph Test
QtyPrice
1-5 $336
6+ $286
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 2.0 OD, 12.5 mm diameter 200FNIR-12.5 $138 $117 9
Description Standard IR ND Filter, OD=2.0, 12.5mm diameter
CSV File (typical) 200FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 2.0 OD, 25.0 mm diameter 200FNIR-25 $276 $235 40
Description Standard IR ND Filter, OD=2.0, 25mm diameter
CSV File (typical) 200FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 2.0 OD, 50.0 mm diameter 200FNIR-50 $570 $485 4
Description Standard IR ND Filter, OD=2.0, 50mm diameter
CSV File (typical) 200FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 2.0 OD, 25.0 mm diameter 200FNIR-BBAR-25 $336 $286 0
Description Custom IR ND Filter, OD=2.0,with A/R 25mm diameter
Graph Test
QtyPrice
1-5 $336
6+ $286
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 2.5 OD, 12.5 mm diameter 250FNIR-12.5 $138 $117 6
Description Standard IR ND Filter, OD=2.5, 12.5mm diameter
CSV File (typical) 250FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 2.5 OD, 25.0 mm diameter 250FNIR-25 $276 $235 0
Description Standard IR ND Filter, OD=2.5, 25mm diameter
CSV File (typical) 250FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 2.5 OD, 50.0 mm diameter 250FNIR-50 $570 $485 2
Description Standard IR ND Filter, OD=2.5, 50mm diameter
CSV File (typical) 250FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 3.0 OD, 12.5 mm diameter 300FNIR-12.5 $138 $117 0
Description Standard IR ND Filter, OD=3.0, 12.5mm diameter
CSV File (typical) 300FNIR.csv
Graph Test
QtyPrice
1-5 $138
6+ $117
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 3.0 OD, 25.0 mm diameter 300FNIR-25 $276 $235 12
Description Standard IR ND Filter, OD=3.0, 25mm diameter
CSV File (typical) 300FNIR.csv
Graph Test
QtyPrice
1-5 $276
6+ $235
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 3.0 OD, 50.0 mm diameter 300FNIR-50 $570 $485 7
Description Standard IR ND Filter, OD=3.0, 50mm diameter
CSV File (typical) 300FNIR.csv
Graph Test
QtyPrice
1-5 $570
6+ $485
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 3.0 OD, 25.0 mm diameter 300FNIR-BBAR-25 $336 $286 0
Description Custom IR ND Filter, OD=3.0, with A/R 25mm diameter
Graph Test
QtyPrice
1-5 $336
6+ $286
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 1.0 OD, 25.0 mm diameter ANDV16326 $256 $256 0
Description IR ND Filter, OD=1.0, 25mm diameter (w/edge marking)
Graph Test
QtyPrice
1-5 $256
6+ $256
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 2.0 OD, 25.0 mm diameter ANDV16327 $256 $256 0
Description IR ND Filter, OD=2.0, 25mm diameter (w/edge marking)
Graph Test
QtyPrice
1-5 $256
6+ $256
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .
+ IR ND, 3.0 OD, 25.0 mm diameter ANDV16328 $256 $256 0
Description IR ND Filter, OD=3.0, 25mm diameter (w/edge marking)
Graph Test
QtyPrice
1-5 $256
6+ $256
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
Click icon to display graph .