Neutral Density Filters, also known as ND Filters, are a kind of optical filter that transmit a portion of the spectrum with even attenuation. This attenuation is achieved through absorption, reflection, or a combination of both, without introducing color shifts or distortions to the transmitted light. ND filters offer precise control over light intensities without altering their spectral characteristics, which renders them useful in industrial imaging, machine vision, spectroscopes, lasers, etc., where overexposure of light is harmful to camera sensors or other optical components, or when excessive light will cause inaccurate results in photometers. ND Filters are also critical components to maintain precise outcomes in photometers through the rejection of excessive light.

Shanghai North Optics offers various Neutral Density Filters for Ultraviolet (UV), Visible, or Infrared (IR) applications, accommodating operations in different spectra. This page specifies our Custom VIS Neutral Density Filters with a transmission wavelength range of 400-700nm. Crafted with precision engineering and superior materials, our ND Filters offer unparalleled control over light intensities without compromising spectral integrities. Continuously variable ND filters in rectangular or round shapes are also available.