AND-20S-05 20 x 20 mm Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

OptoSigma's AND-20S-05 is a 20 x 20 mm Neutral Density Filter, designed for use in the visible light spectrum, specifically between 400-700nm. This filter is unmounted, providing users with the flexibility to integrate it into their existing optical systems.

The filter is of the Absorptive Neutral Density type, which means it reduces the intensity of light without altering its color balance. This is achieved through the use of a special coating, denoted as 'opt and-05' on both the front and back surfaces of the filter. This coating ensures a consistent attenuation of light across the visible spectrum.

The filter is rectangular in shape, with dimensions of 20 x 20 mm, and has a thickness of 2mm. It is made from UVFS Mal-1965 optical glass, a material known for its high transmittance and durability. The filter's thin lens shape allows for easy integration into various optical systems.

The catalog number for this item is AND-20S-05, and it is currently in stock. For more information, users can refer to the product's webpage at https://www.optosigma.com/us_en/optics/filters/neutral-density-filters/absorptive-neutral-density-filter-unmounted-visible-square-20x20mm-5-AND-20S-05.html.