FNDU-20C02-80 20 mm Dia. Unmounted UVFS Reflective Neutral Density Filter; t=2mm 200-400nm

OptoSigma's FNDU-20C02-80 is a 20 mm diameter, unmounted UVFS reflective neutral density filter, designed for use in the ultraviolet spectrum. This filter is part of the OptoSigma family of reflective neutral density filters, which are known for their high-quality optical performance and durability.

The filter is made from UVFS material, which is specifically designed for use in the ultraviolet spectrum. It has a thickness of 2mm and is coated with Opt FNDU-80 on both the front and back surfaces. This coating enhances the filter's performance in the UV range, providing a high level of neutral density while maintaining excellent transmission characteristics.

The FNDU-20C02-80 has a circular shape and a thin lens design, making it suitable for use in a wide range of optical systems. It is currently in stock and available for purchase through the OptoSigma website. The filter's catalog number is FNDU-20C02-80, and it can be found on the OptoSigma website at https://www.optosigma.com/us_en/optics/filters/neutral-density-filters/reflective-neutral-density-filter-unmounted-uv-20mm-diameter-80i1-4-FNDU-20C02-80.html.