FND-50C02-30 50 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm

The FND-50C02-30 is a high-quality Neutral Density Filter, unmounted, with a 50 mm diameter and a thickness of 2mm. This filter is designed for use in the visible spectrum, specifically between 400-700nm, making it ideal for a wide range of optical applications.

The filter is made from N-BK7, a type of borosilicate glass manufactured by Schott AG, which is known for its excellent optical properties. This material is highly transmissive across the visible spectrum, ensuring minimal loss of light and high-fidelity color reproduction.

The filter features a reflective neutral density coating on both the front and back surfaces, denoted as 'opt fnd-30'. This coating reduces the intensity of light passing through the filter without altering its color balance. The 'opt fnd-30' coating provides a neutral density of 0.3, which corresponds to a transmission of approximately 50%.

The filter's shape is described as a 'Thin Lens', indicating that it has been designed to minimize optical aberrations and distortions. This makes it suitable for use in high-precision optical systems where image quality is paramount.

The filter is sourced from OptoSigma, a leading vendor in the field of optical components. It is currently in stock and available for purchase through their website.