Neutral density (by absorption) filters
Main features
- Optical density selection from 0,1 to 4
- ⌀25,4 mm standard diameter
- Excellent for low-power applications
- Custom dimensions, optical densities are available upon request
Application examples
- Overexposure prevention for cameras and other detectors
Request custom
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- Description
- Specifications
Neutral density (by absorption) filters are designed to feature even and flat transmission over particular wavelength range and defined by optical density (OD). Overall optical attenuation is a sum of optical absorption in neutral density optical glass and Fresnel reflection losses. Neutral density optical filters densities adds up, if used in series.
| Neutral density (by absorption) filters | |
|---|---|
| Material | Neutral density optical glass |
| Design wavelength | 450-650 nm |
| Optical density tolerance | ±5% |
| Clear aperture | >85% |
| Face dimensions tolerance | +0/-0,2 mm |
| Parallelism error | <3 arcmin |
| Protective chamfers | <0,35 mm at 45° |
| Surface quality | 60-40 S-D |
| Surface flatness | <1λ@632,8 nm |
| Coatings | Uncoated, available upon request |
Order your item
Face dimensions
Optical density
Design wavelength
SKU
price
quantity
⌀25,4 mm
0,1
450-650 nm
6498
21 €
⌀25,4 mm
0,2
450-650 nm
6499
21 €
⌀25,4 mm
0,3
450-650 nm
6500
21 €
⌀25,4 mm
0,4
450-650 nm
6501
21 €
⌀25,4 mm
0,5
450-650 nm
6502
21 €
⌀25,4 mm
1
450-650 nm
6503
21 €
⌀25,4 mm
1,5
450-650 nm
6504
21 €
⌀25,4 mm
2
450-650 nm
6505
21 €
⌀25,4 mm
3
450-650 nm
6506
21 €
⌀25,4 mm
4
450-650 nm
6507
21 €
1
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