About REYNARD- Type: Filters
- Diameter / Dimension: 25mm - 200mm
- Filter Category: Neutral Density Filter
- Applications: Astronomy, Biomedical/Medical, Communications, Industrial, Military, Scientific Research, Other
- Outside Diameter: 25 - 200+ mm
- Inside Diameter: 7.5mm – 25.4mm
- Surface Quality (SQ): 80-50 scratch/dig
- TWE: < 2 waves per 25 mm
- Paralleism: < 3 arc min
- Optical Density Range: Types: 0-1, 2, 3, 4, or 5
Custom Circular Variable ND filters are used in high quality optical systems to change the intensity of light from 100% to less than 0.1%. As the filter rotates the beam intensity is modified due to the density variation of a gradient metallic coating around the filter.
These filters are fully customizable in optical density gradient function, transmission gradient function, substrate type, coating materials, and size to match your application requirements. The typical coating material is a nickel variant for room temperature, low-power applications, but the ND coating can be enhanced to increase survivability in hostile environments using other common and precious metals to match the absorption, spectral, and environmental characteristics of a customized system.
The key features: supplied as a linear or customized gradient function, from 45° to 360° of rotation, from 1.0” (~25mm) to 8” (~200mm) in diameter, used for laser as well as wide band applications. ISO 9001:2015 and ITAR