ND2R03B Dia. 50 mm Unmounted Reflective ND Filter; Optical Density 0.3

The ND2R03B is a circular Neutral Density (ND) filter, unmounted and with a diameter of 50 mm, sourced from the renowned optical component manufacturer, 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 feature is its Optical Density (OD) of 0.3, which corresponds to a reduction factor of approximately 20% in light intensity. This makes it suitable for applications where moderate light reduction is required. The ND2R03B is made of N-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties, including low auto-fluorescence and high damage threshold.

The filter's geometry includes a thickness of 2 mm, which contributes to its durability and stability. The front and back surfaces of the filter are coated with THo ND03, a proprietary anti-reflection coating developed by Thorlabs. This coating reduces surface reflections, thereby enhancing transmission and minimizing ghosting and flare effects.

The ND2R03B filter features a thin lens shape, which is beneficial for applications where space is a constraint. The filter's web links provide direct access to Thorlabs' product page, where users can find additional information, such as datasheets, technical drawings, and safety data. The link status indicates that the filter is currently in stock, ensuring prompt delivery upon order placement.