NDW02B Dia. 25 mm Reflective ND Filter; Optical Density 0.2

The NDW02B is a circular Neutral Density (ND) filter, 25 mm in diameter, with 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 ND property is characterized by an Optical Density (OD) of 0.2. This value signifies a 20% reduction in light intensity, offering a subtle yet effective means of controlling light levels. The NDW02B is particularly suitable for applications where minimal light reduction is required, or where precise control over light intensity is necessary.

The NDW02B filter is constructed from N-BK7 Schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence. This material ensures the filter maintains high optical quality, reducing the risk of image degradation due to optical aberrations.

The filter's front and back surfaces are coated with the THORNDW02B coating, which enhances its performance and durability. This coating reduces surface reflections, improving transmission and minimizing the risk of stray light within the optical system.

The NDW02B filter features a 'Thin Lens' shape, which refers to its flat, thin design. This shape allows for easy integration into various optical systems, particularly where space is at a premium.