NE220B 2 in x 2 in Absorptive ND Filter; Optical Density 2.0

The NE220B is a Neutral Density Filter from Thorlabs, measuring 2 in x 2 in with an optical density of 2.0. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an essential tool for various optical applications.

The filter is made of n-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties. It has a thickness of 1.4 mm, providing durability while minimizing optical distortion. The NE220B features a rectangular base shape, allowing for versatile mounting options.

The NE220B is coated with THo NE20A on both the front and back surfaces. This coating enhances the filter's performance by reducing reflection and improving transmission, ensuring optimal light absorption. The coating also provides chemical resistance, protecting the filter from environmental hazards.

The filter's geometry is defined by its width (50.8 mm), height (50.8 mm), and thickness (1.4 mm). This compact size makes it suitable for use in confined spaces. The NE220B's shape is classified as a Thin Lens, indicating its ability to focus light without introducing significant spherical aberration.

The NE220B is currently in stock and available for purchase through the vendor's website. For more information, users can visit the provided weblink.