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
- Standard specifications
Neutral density (by absorption) filters are designed for a flat transmission over a particular wavelength range and defined by the optical density (OD). Overall optical attenuation is a sum of optical absorption in neutral density optical glass and Fresnel reflection losses. Neutral density optical filter densities add up when 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/-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 |
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Face dimensions
Design wavelength
Optical density
Transmission
SKU
PRICE
QUANTITY
⌀25,4 mm
450-650 nm
0,1
79%
6498
25 €
⌀25,4 mm
450-650 nm
0,2
63%
6499
25 €
⌀25,4 mm
450-650 nm
0,3
50%
6500
25 €
⌀25,4 mm
450-650 nm
0,4
40%
6501
25 €
⌀25,4 mm
450-650 nm
0,5
32%
6502
25 €
⌀25,4 mm
450-650 nm
1
10%
6503
25 €
⌀25,4 mm
450-650 nm
1,5
3%
6504
25 €
⌀25,4 mm
450-650 nm
2
1%
6505
26 €
⌀25,4 mm
450-650 nm
3
0,1%
6506
28 €
⌀25,4 mm
450-650 nm
4
0,01%
6507
29 €
1
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