MFNDU-52-1 52 mm Dia. Mounted UVFS Reflective Neutral Density Filter; t=2mm 200-400nm

The MFNDU-52-1 is a 52 mm diameter Neutral Density Filter, designed and manufactured by OptoSigma. This filter is part of the Reflective Neutral Density series, which is known for its high-quality optical performance. The filter is mounted, making it ready for immediate use in optical systems that require a neutral density filter.

The filter's primary function is to reduce the intensity of light entering the optical system without altering the color composition. This is particularly useful in high-intensity lighting conditions or when using high-power light sources. The filter's neutral density characteristic ensures that the light reduction is uniform across the entire visible spectrum, from 200 to 400nm.

The filter is made from UVFS material, identified as MAL-1965. This material is known for its excellent optical properties, making it an ideal choice for precision optical applications. The filter has a thickness of 2mm, providing robustness and stability in its mounting.

The front and back surfaces of the filter are coated with Opt FNDU-1, a specialized coating that enhances the filter's performance and durability. This coating helps to reduce surface reflections, increasing the transmission of light and reducing unwanted glare.

The filter's geometry is that of a thin lens, which is beneficial in applications where space is a constraint. The 52mm diameter provides a good balance between size and light-gathering capability, making it suitable for a wide range of optical systems.