|Optical Density Range||OD 0.1 to OD 3.0||Wavelength Range||400nm to 700nm|
|Aperture||>90%||Transmitted Wavefront Distortion||<λ/4@633nm|
|Parallelism||<30 arc second||Surface Quality||40/20 S/D|
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.
Hangzhou Shalom EO offers a wide variety of Neutral density Filters for Ultraviolet (UV), Visible, or Infrared (IR) applications. The continuously variable ND filters in rectangular or round is available.