Neutral Density Coating

  • Neutral density (ND) coating is a type of optical coating that reduces the intensity of light passing through it, without altering the color or wavelength of the light. This type of coating is often used in photography, cinematography, and other applications where control over the amount of light entering a lens is important.
  • ND coatings are typically made by depositing a thin layer of metal or metal oxide onto a glass or plastic substrate. The thickness of the coating determines the amount of light that is attenuated.
  • Neutral density coatings come in a range of densities, typically measured in terms of optical density (OD). The OD value is a logarithmic measure of the reduction in light intensity. A coating with an OD value of 1 reduces the intensity of light passing through it by a factor of 10, while a coating with an OD value of 2 reduces the intensity by a factor of 100, and so on.
  • ND coatings are commonly used in photography and cinematography to achieve shallow depth of field or motion blur in bright lighting conditions. They can also be used in scientific and industrial applications where control over light intensity is critical.
  • In addition to attenuating light, ND coatings can also provide other benefits, such as reducing glare and improving contrast. The exact composition and thickness of the coating will depend on the application and desired performance.
  • Overall, neutral density coatings are a valuable technology that can improve the functionality and performance of a wide range of optical devices. The exact type and configuration of the coating will depend on the application, but the benefits of improved control over light intensity make it a popular choice in many industries.