UV Reflective Neutral Density Filters (NDU)
- UV and visible attenuation
- Optical Density = log (1/T)
These neutral density filters are made by applying an inconel film to a UV Fused Silica substrate. Inconel has a very neutral transmittance so it does not introduce any spectral distortion while attenuating the beam. Each filter will be provided a transmission scan @ 250nm.
Material: |
UV
Grade Fused Silica |
Thickness: |
1-3 mm |
Dimension Tolerance: |
<+ 0 / – 0.015″ |
Surface Quality: |
<60/40 |
Optical Density: |
Nominal @ 250 nm |
Tolerance on Optical Density: |
± 10% of optical density @ 250nm |
Clear Aperture: |
> 85% of central circular dimension |
UV Reflective Neutral Density Filters (NDU)