FND-25C02-30 25 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm

The FND-25C02-30 is a high-quality Neutral Density Filter, unmounted and with a 25 mm diameter. This filter is sourced from OptoSigma, a renowned vendor in the optical industry, and is available for purchase through their official website. The filter's catalog number is FND-25C02-30, and it is currently in stock.

This Neutral Density Filter is made of N-BK7 Schott, a high-grade optical glass known for its excellent transmittance and low auto-fluorescence. The filter's geometry includes a diameter of 25 mm and a thickness of 2 mm, making it suitable for a wide range of optical applications.

The FND-25C02-30 features a Reflective Neutral Density coating on both the front and back surfaces. This coating, identified as 'opt fnd-30', is designed to provide a uniform attenuation of light across the visible spectrum, specifically within the 400-700 nm range. This makes the filter ideal for applications requiring precise light control, such as in imaging systems, beam shaping, or laser applications.

The filter's shape is described as a Thin Lens, indicating a carefully controlled curvature for optimal optical performance. This feature, combined with the high-quality materials and coatings used, ensures that the FND-25C02-30 delivers reliable and consistent performance in various optical setups.