ND20A Dia. 25 mm ND Reflective Filter; SM1-Threaded Mount; Optical Density 2.0

The ND20A is a Neutral Density Filter, specifically designed for use in optical systems requiring a significant reduction in light intensity. Manufactured by Thorlabs, this filter boasts a 25 mm diameter and a 1 mm thickness, making it a compact yet powerful component in your optical setup.

The filter is constructed from n-BK7 Schott, a high-quality optical glass, ensuring excellent optical performance. It features a thin lens shape, which is beneficial for maintaining the overall profile and integrity of your optical system.

The ND20A filter's primary function is to reduce the intensity of light without altering its color composition. This is achieved through the application of a front and back coating of THo ND20, a specialized coating that provides an Optical Density of 2.0. This high optical density ensures a substantial reduction in light intensity, making it ideal for use in high-powered laser applications or other situations where light intensity needs to be carefully controlled.

The filter is SM1-threaded, allowing for easy integration into existing optical systems that use this thread standard. The availability of this item is currently in stock, as indicated by its weblink status. For more detailed information, including pricing and purchasing options, please refer to the provided weblink.