NDUV240B 50 mm x 50 mm UVFS Reflective ND Filter; OD 4.0

The NDUV240B is a Neutral Density Filter, specifically designed for use in UVFS (UV Fused Silica) applications. This filter, offered by Thorlabs, boasts a compact rectangular shape, making it a versatile choice for various optical setups. The filter's dimensions are 50 mm in width and 50 mm in height, with a thickness of 2 mm, ensuring a slim profile that minimizes interference with other components in your system.

The NDUV240B features a uniform coating of THo NDUV OD4 on both the front and back surfaces. This coating is designed to provide a Neutral Density of 4.0, which means it reduces the intensity of incident light without altering its color composition. This is particularly useful in applications where controlling light intensity is crucial, such as in high-power laser systems or in imaging setups where excessive light might lead to image saturation.

The filter's shape is classified as a Thin Lens, indicating that it has been designed to minimize optical aberrations and distortions. This is achieved through the precise application of the coating and the careful control of the filter's geometry. The result is a filter that preserves the integrity of the light passing through it, ensuring accurate and reliable optical performance.