ND506B Dia. 0.5 in Unmounted Reflective ND Filter; Optical Density 0.6

The ND506B is a circular, unmounted Neutral Density (ND) filter, boasting a diameter of 0.5 inches and a thickness of 1 millimeter. This filter, sourced from the reputable vendor Thorlabs, is designed to reduce the intensity of incident light without altering its color composition. The ND506B achieves this through its optical density of 0.6, which corresponds to a reduction of approximately 60% in light intensity.

The filter is made from N-BK7 Schott glass, a material known for its excellent optical properties, including high homogeneity, low auto-fluorescence, and superior transmittance across a wide spectrum. This makes the ND506B suitable for a variety of applications, particularly where precise light control is required.

The front and back surfaces of the filter are coated with Thorlabs' proprietary tho nd06 coating. This coating enhances the filter's performance by reducing surface reflections, thereby increasing transmission and minimizing ghosting and flare. The coating also provides chemical resistance and durability, ensuring the filter's longevity and reliability.

The ND506B's thin lens shape further contributes to its versatility. This shape allows for easy integration into various optical systems, providing a cost-effective solution for light management.