FNDU-25C02-70 25 mm Dia. Unmounted UVFS Reflective Neutral Density Filter; t=2mm 200-400nm

The FNDU-25C02-70 is a 25 mm diameter, unmounted Neutral Density Filter, sourced from the renowned optical component manufacturer, OptoSigma. This filter is designed for use in the ultraviolet (UV) range, specifically between 200 and 400 nanometers, making it an ideal choice for applications requiring precise control over UV light intensity.

The filter features a reflective coating, Opt FNDU-70, on both the front and back surfaces, which provides a high level of neutral density while maintaining excellent color balance. This coating is specifically designed to minimize reflection and transmission losses, ensuring optimal performance in a wide range of UV applications.

The filter's geometry includes a diameter of 25 mm and a thickness of 2 mm, making it a thin lens type. This design not only reduces weight and bulk but also minimizes optical aberrations, contributing to superior image quality.

The FNDU-25C02-70 is currently in stock and available for immediate purchase through the OptoSigma website. With its high-quality construction, precise UV light control, and versatile design, this filter is an excellent choice for researchers, engineers, and optical professionals working in the UV spectrum.