NE2R02A Dia. 2 in Absorptive ND Filter; SM2-Threaded Mount; Optical Density 0.2

The NE2R02A is a Neutral Density (ND) Filter, specifically designed for applications requiring a reduction in light intensity without altering the color composition of the light source. This filter, offered by Thorlabs, is circular in shape with a diameter of 50.8 mm and a thickness of 1.4 mm, making it compatible with a wide range of optical systems.

The filter features an SM2-threaded mount, a common thread size in the optical industry, ensuring ease of integration with existing systems. The front and back of the filter are coated with tho ne02a, a specialized coating that enhances the filter's performance and durability.

The NE2R02A has an optical density of 0.2, which corresponds to a transmission of approximately 81%. This means it reduces the light intensity by a factor of 1.26, providing a subtle yet effective means of controlling light levels.

The filter's material ID, uvfs mal- 1965, provides additional information about its composition and manufacturing process, which can be crucial for specific applications. The wavelength of 633 nm suggests that this filter is optimized for red light, although it can still be used effectively across a broader spectrum.