Linear Variable Neutral Density Filters (LVND)
The Linear Variable Neutral Density Filter is used to attenuate light as the filter is translated. The filters can be used with white light as well as with low power lasers. A large finite aperture can be attenuated by translating two filters in opposite directions.
Custom sizes and densities are available upon request.
Specification & Models:
| Part Number | Substrate Material | Length | Width | Optical Density |
|---|---|---|---|---|
| R00221-xx | BK-7 | 50mm | 25mm | Specify |
| R00231-xx | BK-7 | 75mm | 25mm | Specify |
| R00241-xx | BK-7 | 100mm | 25mm | Specify |
| R00251-xx | BK-7 | 125mm | 25mm | Specify |
| R00261-xx | BK-7 | 150mm | 25mm | Specify |
| R022xQ-xx | Fused Silica | 50mm | 25mm | Specify |
| R023xQ-xx | Fused Silica | 75mm | 25mm | Specify |
| R024xQ-xx | Fused Silica | 100mm | 25mm | Specify |
| R025xQ-xx | Fused Silica | 125mm | 25mm | Specify |
| R026xQ-xx | Fused Silica | 150mm | 25mm | Specify |
| R022xZ-xx | ZnSe | 50mm | 25mm | Specify |
| R023xZ-xx | ZnSe | 75mm | 25mm | Specify |
| R024xZ-xx | ZnSe | 100mm | 25mm | Specify |
| R025xZ-xx | ZnSe | 125mm | 25mm | Specify |
Specifications:
- Coating Types: Metallic
- Optical Density Range: Specify: 0-1, 2, 3, 4, or 5
- Width: 25mm
- Length: 50mm – 150mm
- Tolerance: ± 5% Absolute
- Substrate Materials: BK-7, Fused Silica and ZnSe
- Transmission Range: 100% – 10%, 1%
- 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
- Parallelism: < 3 Arc Minutes
- TWE: < 2 Waves per 25mm
