The NE510A is a Neutral Density Filter from Thorlabs, designed with a circular shape and a diameter of 0.5 inches. It is made from n-bk7 schott material, a common choice for its excellent optical properties. The filter features a thin lens shape, with a thickness of 1.9 millimeters, making it suitable for applications where space is a constraint.
This filter is part of Thorlabs' NE10A series, which provides high-quality, consistent absorption over a wide range of wavelengths. The NE510A, in particular, is designed for use at a wavelength of 633 nanometers. The front and back of the filter are coated with tho ne10a, a coating that ensures the filter's neutral density performance.
The NE510A comes with an SM05-threaded mount, providing a secure and easy-to-use method of attachment to other optical components. According to Thorlabs' website, the item is currently in stock, and you can find more information or place an order through the provided weblink.