ND201B 50 mm x 50 mm; Unmounted Reflective ND Filter; Optical Density 0.1

The ND201B is a 50 mm x 50 mm unmounted reflective neutral density filter, boasting an optical density of 0.1. This filter is sourced from the renowned optical component manufacturer, Thorlabs. The ND201B is specifically designed for applications that require a reduction in light intensity without altering the color composition of the incident light.

The filter is made from N-BK7 Schott glass, a material known for its excellent optical properties, making it an ideal choice for precision optical applications. The ND201B features a rectangular base shape, which provides flexibility in beam shaping and alignment. The filter's geometry includes a width of 50 mm, a height of 50 mm, and a thickness of 2 mm, ensuring a compact and robust design.

The ND201B is coated with Thorlabs' proprietary THo ND01 coating on both the front and back surfaces. This coating enhances the filter's performance by reducing surface reflections and increasing transmission, thereby minimizing losses and improving overall system efficiency. The filter's shape is designed in a thin lens format, which further contributes to its versatility and ease of integration into various optical systems.