ND Filters, also known as Neutral Density Filters, are often used in imaging or laser applications where excessive light can be damaging to camera sensors or other optical components. ND Filters are also ideal for preventing excessive light from causing inaccurate results in photometer applications. ND Filters are designed to reduce transmission evenly across a portion of the spectrum by absorbing or reflecting the portion of the light that is not being transmitted.

AOS Optics offers a wide variety of Neutral Density Filters for Ultraviolet (UV), Visible, or Infrared (IR) applications. Neutral Density Filter Kits are available, which include a number of filters in a range of optical densities. By stacking Neutral Density Filters, the optical density can be increased.