Photo of Andover's IR ND filters
  • Provides attenuation with greater linearity over a wide spectral range
  • Delivers superior durability
  • Custom substrates available

IR Neutral Density Filter Sets

For your convenience and ecomony, Andover offers its metallic-coated infrared neutral density filters (IR ND filters) in sets. The cost is 10% lower than purchasing the individual parts, and they are supplied with a sturdy, hardwood storage case.

Andover's IR ND filters exhibit outstanding spectral neutrality, outperforming all others on the market. General specificatiosn are listed below. For individual part specifications, click here. 

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
+ 5-pc IR ND Filter Set, 12.5mm, OD=0.3, 0.5, 1.0, 2.0, 3.0 FNIR-SET-05-12.5 $590 $502
Description 5-pc IR ND Filter Set, 12.5mm, OD=0.3, 0.5, 1.0, 2.0, 3.0
Note: Comes with hardwood storage box
QtyPrice
1-5 $590
6+ $502
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ 5-pc IR ND Filter Set, 25mm, OD=0.3, 0.5, 1.0, 2.0, 3.0 FNIR-SET-05-25 $1179 $1002
Description 5-pc IR ND Filter Set, 25mm, OD=0.3, 0.5, 1.0, 2.0, 3.0
Note: Comes with hardwood storage box
QtyPrice
1-5 $1179
6+ $1002
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ 5-pc IR ND Filter Set, 50mm, OD=0.3, 0.5, 1.0, 2.0, 3.0 FNIR-SET-05-50 $2441 $2075
Description 5-pc IR ND Filter Set, 50mm, OD=0.3, 0.5, 1.0, 2.0, 3.0
Note: Comes with hardwood storage box
QtyPrice
1-5 $2441
6+ $2075
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ 12-pc IR ND Filter Set, 12.5mm, OD=0.3, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5, 3.0 FNIR-SET-12-12.5 $1308 $1112
Description 12-pc IR ND Filter Set, 12.5mm, OD=0.3, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5, 3.0
Note: Comes with hardwood storage box
QtyPrice
1-5 $1308
6+ $1112
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ 12-pc IR ND Filter Set, 25mm, OD=0.3, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5, 3.0 FNIR-SET-12-25 $2831 $2406
Description 12-pc IR ND Filter Set, 25mm, OD=0.3, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5, 3.0
Note: Comes with hardwood storage box
QtyPrice
1-5 $2831
6+ $2406
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ 12-pc IR ND Filter Set, 50mm, OD=0.3, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5, 3.0 FNIR-SET-12-50 $5861 $4982
Description 12-pc IR ND Filter Set, 50mm, OD=0.3, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5, 3.0
Note: Comes with hardwood storage box
QtyPrice
1-5 $5861
6+ $4982
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.