15 May 2015 Reynard Corporation offeres customization of their Circular Variable Neutral Density (CVND) Filters. This technology is best 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. Used from the UV to the Far Infrared, density neutrality can be achieved for narrow band applications, such as lasers, to wide band applications, such as the spectrum of white light. These filters are fully customizable in optical density gradient function, transmission gradient function, substrate type, coating materials, and size to match your application requirements.
These filters are typically specified in linear optical density or transmission. But, since all optical systems are not linear in operation, Reynard Corporation offers the capability of customizing the density gradient based on user defined functions. The filters can be made on a variety of substrates including BK-7, Fused Silica, ZnSe, and Ge, among several others. 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 hostel environments by the use of other common and precious metals to match the absorption, spectral, and environmental characteristics of a customized system.
For more information on this product, visit our website at http://www.reynardcorp.com/products/optical-components/optical-components/variable-filters/45-circular-variable-neutral-density-filters.html
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