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- 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.