Circular Variable Neutral Transmission Filters (CVNT)
The Circular Variable Neutral Transmission filters (UV-VIS) are designed to attenuate light as a function of transmission instead of density. These CVNT filters are much more sensitive to position at the lower transmission values than are linear density filters. Sizes are available from 25mm to over 200mm in diameter.
Custom sizes and densities are available upon request.
Specification & Models:
| Part Number | Substrate Material | Outer Diameter | Inner Diameter | Optical Density |
|---|---|---|---|---|
| R06701-xx | BK-7 | 25mm | 7.5mm | Specify |
| R06703-xx | BK-7 | 50mm | 7.5mm | Specify |
| R06705-xx | BK-7 | 75mm | 7.5mm | Specify |
| R06707-xx | BK-7 | 100mm | 7.5mm | Specify |
| R06709-xx | BK-7 | 125mm | 25.4mm | Specify |
| R06711-xx | BK-7 | 150mm | 25.4mm | Specify |
| R06713-xx | BK-7 | 175mm | 25.4mm | Specify |
| R06715-xx | BK-7 | 200mm | 25.4mm | Specify |
| R06801-xx | Fused Silica | 25mm | 7.5mm | Specify |
| R06803-xx | Fused Silica | 50mm | 7.5mm | Specify |
| R06805-xx | Fused Silica | 75mm | 7.5mm | Specify |
| R06807-xx | Fused Silica | 100mm | 7.5mm | Specify |
| R06809-xx | Fused Silica | 125mm | 25.4mm | Specify |
| R06811-xx | Fused Silica | 150mm | 25.4mm | Specify |
| R06812-xx | Fused Silica | 175mm | 25.4mm | Specify |
| R06815-xx | Fused Silica | 200mm | 25.4mm | Specify |
Specifications:
- Coating Types: Metallic
- Outside Diameter (OD): 25mm – 200mm
- OD Tolerance: ± 5% Absolute
- Inside Diameter: 7.5mm – 25.4mm
- Substrate Materials: BK-7, Fused Silica
- Thickness: 2.0mm ± 0.2mm
- Transmission Range: Specify: Clear (92%) to 1% or 10%
- Wavelength Calibration: BK-7: 510nm, F.S: 510nm, ZnSe: 2.5µm
- Wavelength Range: BK-7: 375nm – 2500nm, F.S: 200nm – 2500nm, ZnSe: 2.0µm – 5.0µm
- Anti-Reflection Coating: Available
- Gradient Range: 270° Typical
- Parallelism: < 3 Arc Minutes
- TWE: < 2 Waves per 25mm
- Centration: ± 0.2mm
