FND-20C02-1 20 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm

The FND-20C02-1 is a 20 mm diameter, unmounted Neutral Density Filter, boasting a thickness of 2mm and designed for use within the visible light spectrum, specifically between 400-700nm. This filter is sourced from OptoSigma, a renowned vendor known for their high-quality optical elements.

This filter is made from N-BK7, a type of borosilicate glass manufactured by Schott AG, a leading glass manufacturer. N-BK7 is widely used in the optical industry due to its excellent optical properties, including low autofluorescence, high homogeneity, and superior transmittance across a broad spectrum.

The filter features a Reflective Neutral Density coating on both the front and back surfaces, identified as 'opt fnd-1'. This coating is designed to reduce the intensity of light passing through the filter without altering its color balance. The reflective nature of this coating ensures high durability and resistance to wear, making it ideal for applications requiring consistent performance over time.

The filter's geometry is defined by its 20mm diameter and thin lens shape, with a thickness of just 2mm. This combination of a large diameter and thin profile makes it a versatile option for various applications.

The filter's information is currently in stock and available for immediate purchase. For more details, users are encouraged to visit the provided weblink, which leads to the product's page on the OptoSigma website.