NE70B Dia. 25 mm Absorptive ND Filter; Optical Density 7.0

The NE70B is a Neutral Density Filter, specifically designed with an optical density of 7.0, sourced from the reputable vendor Thorlabs. This filter is circular in shape, with a diameter of 25 mm and a thickness of 1.7 mm, making it a compact yet effective optical component.

The filter is made from high-quality N-BK7 Schott glass, a material known for its excellent optical properties, including high homogeneity, low auto-fluorescence, and superior hardness. This ensures the filter's durability and resistance to scratches, while also maintaining optimal light transmission.

The NE70B filter features a Tho NE70A coating on both the front and back surfaces. This coating is designed to absorb a significant amount of light, reducing the intensity of the transmitted light without altering its color balance. This makes the NE70B ideal for applications where a high degree of light attenuation is required, such as in high-power laser systems or in intense light source environments.

The filter's geometry is designed in a Thin Lens shape, which not only contributes to its compactness but also minimizes optical aberrations. This ensures that the filter provides clear, distortion-free light transmission, enhancing the overall performance of your optical system.