The NE13B-B is a Neutral Density Filter with a diameter of 25 mm, manufactured by Thorlabs. This filter is designed for use within the wavelength range of 633 nm, and it boasts a base shape of a circle. The filter is constructed from UVFS material, identified by the Mal-1965 material ID.
The NE13B-B filter has a thickness of 2.5 mm and is coated with AR (Anti-Reflective) coatings on both the front and back surfaces. These coatings are optimized for the wavelength range of 650-1050 nm. The filter's shape is that of a thin lens, making it suitable for a wide range of optical applications.
According to the vendor's information, the NE13B-B filter is currently in stock and available for immediate purchase. Further details, including pricing and technical specifications, can be found on the Thorlabs website using the provided catalog number.