FND-15C02-20 15 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm

OptoSigma's FND-15C02-20 is a high-quality Neutral Density Filter, designed for use in the visible light spectrum, specifically between 400-700nm. This unmounted filter, with a 15mm diameter and a thickness of 2mm, is made from N-BK7 Schott, a renowned optical glass known for its excellent transmittance and low auto-fluorescence.

The filter features a reflective neutral density coating on both the front and back surfaces, identified as 'opt fnd-20'. This coating is designed to reduce the intensity of light passing through the filter without altering its color balance, making it an ideal choice for applications requiring precise light control, such as photography, laser applications, and scientific research.

The filter's thin lens shape allows for easy integration into various optical systems. The FND-15C02-20 is currently in stock and available for immediate purchase through the OptoSigma website, as indicated by its 'Valid - in stock' weblink status.