Ø25mm Absorptive VIS-NIR ND Filters
Ø25mm Absorptive VIS-NIR ND Filters
Product name : Ø25mm Absorptive VIS-NIR ND Filters
Description :
With their ability to minimize back-reflections and scattered light, absorptive neutral density (ND) filters are ideal for calibration. In contrast to the metallic type, absorption-type filters achieve their optical density by absorbing light within the substrate. For this reason, thickness is a key determinant of opacity. Because of their absorbing quality, these filters are suitable for low-power applications only.
The absorbing ND filters are unique in that they are AR coated to reduce surface reflections. Polished to TWF 1/4 wave or better, this enables them to be stacked without concern about losses and artifacts due to multiple reflections. Absorbing ND filters are perfect for imaging applications.
BENEFITS
● Ability to minimize back reflections and scattered light
● Suitable for low power applications
COMMON APPLICATIONS
● Photomicrography
● Machine vision
● Calibration
● Photography
● Scientific Measurements and research
| Diameter | 25mm |
| Thickness | 5mm (maximum) |
| Diameter Tolerance | + 0.0/-0.25mm |
| Thickness Tolerance | ± 0.5mm |
| Clear Aperture | 90% of outside dimension |
| Surface Quality | 80/50 per MIL-0-13830B |
| Max. Operating Temperature | +100°C |
| Substrate Material | Schott Absorption Glass |
| Spectral Range | 450 - 700nm |
| Optical Quality | TWF of λ/4 per inch and parallelism of 30 arc seconds or better |
| Mechanical | Unmounted |
Optical Density vs Transmission
| Optical Density | Density Tolerance @ 550nm (%) | Nominal Transmission (%) | Thickness (nm) |
|---|---|---|---|
| 0.1 | ± 20.00 | 79.43 | 4.95 |
| 0.2 | ± 10.00 | 63.1 | 1.52 |
| 0.3 | ± 10.00 | 50.12 | 2.84 |
| 0.4 | ± 10.00 | 39.81 | 3.78 |
| 0.5 | ± 10.00 | 31.62 | 2.11 |
| 0.6 | ± 10.00 | 25.12 | 2.54 |
| 0.7 | ± 10.00 | 19.95 | 2.95 |
| 0.8 | ± 10.00 | 15.85 | 3.38 |
| 0.9 | ± 10.00 | 12.59 | 1.75 |
| 1 | ± 10.00 | 10 | 1.96 |
| 1.5 | ± 10.00 | 3.16 | 2.9 |
| 2 | ± 10.00 | 1 | 2.06 |
| 3 | ± 10.00 | 0.1 | 2.92 |
| 4 | ± 10.00 | 0.01 | 2.82 |
| Model | Description | Optical Density | Nominal Transmission (%) | Diameter (mm) | Price(USD) | Quantity | |
|---|---|---|---|---|---|---|---|
| 0 | 010ABND-25 | Absorptive ND Filter | 0.1 | 79.43 | 25 | - | |
| 1 | 020ABND-25 | Absorptive ND Filter | 0.2 | 63.1 | 25 | - | |
| 2 | 030ABND-25 | Absorptive ND Filter | 0.3 | 50.12 | 25 | - | |
| 3 | 040ABND-25 | Absorptive ND Filter | 0.4 | 39.81 | 25 | - | |
| 4 | 050ABND-25 | Absorptive ND Filter | 0.5 | 31.62 | 25 | - | |
| 5 | 060ABND-25 | Absorptive ND Filter | 0.6 | 25.12 | 25 | - | |
| 6 | 070ABND-25 | Absorptive ND Filter | 0.7 | 19.95 | 25 | - | |
| 7 | 080ABND-25 | Absorptive ND Filter | 0.8 | 15.85 | 25 | - | |
| 8 | 090ABND-25 | Absorptive ND Filter | 0.9 | 12.59 | 25 | - | |
| 9 | 100ABND-25 | Absorptive ND Filter | 1 | 10 | 25 | - | |
| 10 | 150ABND-25 | Absorptive ND Filter | 1.5 | 3.16 | 25 | - | |
| 11 | 200ABND-25 | Absorptive ND Filter | 2 | 1 | 25 | - | |
| 12 | 300ABND-25 | Absorptive ND Filter | 3 | 0.1 | 25 | - | |
| 13 | 400ABND-25 | Absorptive ND Filter | 4 | 0.01 | 25 | - |