AND-20S-30 20 x 20 mm Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

OptoSigma's AND-20S-30 is a Neutral Density Filter, specifically designed for use in the visible light spectrum, with a central wavelength of 550nm. This filter is unmounted, making it a versatile option for various optical setups.

The filter is rectangular in shape, with dimensions of 20 x 20 mm, and has a thickness of 2mm. This compact size and thin profile make it ideal for use in confined spaces or where minimal interference is required. The filter is made from UVFS MAL-1965 optical glass, a material known for its high optical quality and durability.

The filter's coating is another notable feature. Both the front and back surfaces are coated with Opt AND-30, a specialized coating that enhances the filter's performance and longevity. This coating helps to maintain the filter's neutral density, ensuring accurate and consistent light absorption across the visible spectrum.

The filter's geometry is that of a thin lens, further enhancing its optical performance and suitability for a wide range of applications. The filter is currently in stock and available for immediate purchase, as indicated by its valid weblink status.