NDW30B Dia. 25 mm Reflective ND Filter; Optical Density 3.0

The NDW30B is a circular Neutral Density Filter, with a diameter of 25 mm and a thickness of 1 mm, sourced from the reputable vendor Thorlabs. 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's primary function is achieved through its specialized coating. Both the front and back surfaces are coated with the THORNDW30B coating, which provides an Optical Density of 3.0. This high optical density significantly reduces the light intensity, enabling the use of higher power light sources or extended exposure times without overloading the detector or causing saturation.

The NDW30B filter is made from N-BK7 Schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence. This material ensures high-fidelity light transmission and minimal optical distortions.

The filter's thin lens shape allows for easy integration into optical systems, while its 1 mm thickness provides robustness without adding significant weight or bulk. The NDW30B is currently in stock and available for immediate purchase through the provided weblink.