AND-20S-001 20 x 20 mm Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

The AND-20S-001 is a 20 x 20 mm Neutral Density Filter, specifically designed for use in the visible light spectrum, between 400-700nm. This filter is produced by OptoSigma, a leading vendor in the optical industry, known for their high-quality, precision optical components.

The filter is of the Absorptive type, meaning it reduces the intensity of light by absorbing it, rather than reflecting or scattering it. This is achieved through the use of a specialized coating, denoted as 'opt and-001' on both the front and back surfaces of the filter. This coating is designed to maintain a high level of neutrality, ensuring the filter does not introduce any color casts or biases into the light it is filtering.

The filter is rectangular in shape, with dimensions of 20 x 20 mm, and has a thickness of 2mm. This thin profile makes it ideal for use in a variety of optical systems where space is at a premium. The filter is unmounted, providing users with the flexibility to integrate it into their systems in a way that best suits their needs.

The filter's information page, which can be found at https://www.optosigma.com/us_en/optics/filters/neutral-density-filters/absorptive-neutral-density-filter-unmounted-visible-square-20x20mm-0-1-AND-20S-001.html, indicates that it is currently in stock, ensuring quick delivery for those who need it.