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Absorptive neutral density filters
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.
- Sets provide a uniform series of filters for adjusting illumination
- Custom substrate materials and dimensions available
Specifications
| General Specifications | |
|---|---|
| Thickness | 5.0 mm (maximum) |
| Dimensional Tolerance | ±0.5 mm |
| Clear Aperature | 90% of outside dimension |
| Surface Quality | 60/40 per MIL-0-13830B |
| Max. Operating Temperature | +100 °C |
| Substrate Material | Schott absorption glass |
| Spectral Range | 400-700 nm |
| Optical Quality | Flatness of λ/4 per inch and parallelism of 30 arc seconds or better |
| Mechanical | Unmounted |
| Optional | Mounted in threaded ring - ask our expert on the right for thread sizes |
| Optical Density | Nominal Transmission (%) | Transmission @ 550 nm (%) | Thickness (mm) | Part Number |
|---|---|---|---|---|
| 0.10 0.20 0.30 | 79.5 63.0 50.0 | ±20.00 ±10.00 ±10.00 | 4.50 1.67 2.84 | 010ABND 020ABND 030ABND |
| 0.40 0.50 0.60 | 39.8 31.6 25.0 | ±10.00 | 3.78 2.11 2.54 | 040ABND 050ABND 060ABND |
| 0.70 0.80 0.90 | 20.0 15.8 12.6 | ±10.00 ±10.00 ±10.00 | 2.95 3.38 1.75 | 070ABND 080ABND 090ABND |
| 1.00 1.50 2.00 | 10.0 3.2 1.0 | ±10.00 ±10.00 ±10.00 | 1.96 2.90 2.06 | 100ABND 150ABND 200ABND |
| 3.00 4.00 | 0.10 0.01 | ±10.00 ±10.00 | 2.92 2.82 | 300ABND 400ABND |
Available as 25 mm Ø and 50 mm SQ
Applications
Photomicrography
Machine Vision
Photography
Scientific Measurements and Research
Contact
Ing.
Fabrizio
Renzi
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Quantum Design s.r.l.
Via Francesco Sapori, 27
00143 Roma
Italy
| Phone: | +39 06 5004204 |
| Fax: | +39 06 5010389 |
| E-mail: | italy@qd-europe.com |
