NE10A In Stock

The Thorlabs NE10A is an excellent solution for controlling the amount of light entering your optical system. It is a mounted absorptive neutral density (ND) filter that is designed to be used in a wide range of applications, including use with cage systems and lens tube accessories. The NE10A is 25mm in diameter and has a SM1-threaded (1.035"-40) lens tube, making it easily compatible with various optomechanical components.

The NE10A is constructed from a Schott glass substrate that limits the amount of light in the visible range between 400-650 nm. This glass is highly prized for its ability to absorb light evenly across the spectrum, which provides a more stable and predictable performance compared to reflective metallic filters. The NE10A has an optical density of 1.0 (10%), which indicates the filter's ability to reduce the optical power of an incident beam.

The NE10A is designed to provide the highest degree of precision and accuracy. It has a diameter tolerance of +0.0 / -0.25 mm, a clear aperture of >Ø22.5 mm, and a transmitted wavelength error of <λ/4 AT 633 nm.

However, it is important to remember that the NE10A is a delicate optical component that requires proper handling and cleaning to maintain its performance and extend its lifetime. Optics should be inspected prior to use and before and after cleaning, and it is often necessary to use a magnification device to inspect the surface for contaminants and surface defects. A bright light may also be useful in increasing the intensity of the specular reflections from the surface contaminants and defects.

To protect the NE10A from scratches and contamination, it is essential to properly store it. The NE10A should never be placed on hard surfaces as any contaminants on the optic or the surface will be ground in. Instead, wrap the NE10A in lens tissue and store it in a specialized optic storage box. This box should be kept in a low humidity, low contaminant, and temperature-controlled environment to ensure the longevity of the NE10A and your optical system.