NDUV540B Dia. 0.5 in Unmounted UVFS Reflective ND Filter; OD 4.0

The NDUV540B is a circular Neutral Density Filter, unmounted, with a diameter of 0.5 inches and a thickness of 1 millimeter. This filter is sourced from Thorlabs, a renowned vendor in the optical industry, and is part of their UVFS reflective series, specifically identified by the material ID "uvfs mal- 1965".

The NDUV540B is designed to operate at a wavelength of 300 nanometers. It features a coating on both the front and back surfaces, specifically the "tho nduv od4" coating, which provides a Neutral Density of 4.0 (OD 4.0). This coating is uniformly applied across the entire surface of the filter, ensuring consistent performance.

The filter's shape is classified as a Thin Lens, indicating a precise curvature designed to minimize optical aberrations. This feature, combined with its small diameter, makes the NDUV540B an ideal choice for applications requiring a compact, high-performance Neutral Density filter.

According to the vendor's information, the NDUV540B is currently in stock and available for immediate purchase. Further details, including pricing and additional specifications, can be found on the Thorlabs website using the provided catalog number.