FNDU-20C02-5 20 mm Dia. Unmounted UVFS Reflective Neutral Density Filter; t=2mm 200-400nm

OptoSigma's FNDU-20C02-5 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 features a thickness of 2mm and is designed to work within the wavelength range of 200-400nm. It is made from UVFS material, which is specifically designed for use in the ultraviolet spectrum. This material ensures high transmittance and low absorption in the UV range, making it ideal for a wide range of UV applications.

The filter is coated on both the front and back with Opt FNDU-5, a proprietary coating developed by OptoSigma. This coating enhances the filter's performance by reducing reflection and increasing transmission. It also provides protection for the filter surface, helping to prevent scratches and other forms of damage.

The filter's thin lens shape allows it to be easily integrated into optical systems, while its unmounted design provides flexibility in terms of mounting and integration. This makes the FNDU-20C02-5 a versatile choice for a wide range of UV applications.

According to the vendor's website, the filter is currently in stock, indicating that it is readily available for purchase and use. The website also provides a direct link to the product page for further information and purchasing options.