Neutral Density

//Neutral Density
Neutral Density 2017-06-07T13:19:18-07:00

Neutral Density Filters reduce transmission uniformly over a specific portion of the spectrum.  In cameras they are useful when trying to image extremely bright subjects or when trying to separate subject matter from a background by reducing depth of field.  Both absorptive and reflective style options are available, and they’re best used for applications where there’s overpowering brightness.  In the lighting, they are an economical solution for reducing lumen output without changing the spectral profile.  Neutral Density Filters are defined according to their Optical Density (OD).  The higher the OD, the lower the transmission. 

JNS Glass

JNS Glass, Neutral Density Filter


Subtrate:  Any Glass substrate

Thickness: As thin as 70 microns and as thick at 6”

Unmounted Size: Custom Shapes and sizes to 48” x 48”

Mounted Lens Sizes: Threaded Mount sizes:  M13.25-105, C/CS Mount, Slip Mount, Unmounted


  • Available in various optical densities and can be stacked to achieve various optical densities
  • Useful in UV, VIS and NIR spectrums
  • Excellent parallelism, optical flatness and surface quality

Neutral Density Filter:

This neutral density filter example has an optical density of approximately 1.2 and a band average transmittance of 6.25 ±1.25% for wavelengths 400-1100nm.Standard neutral density filter designs are also available for 12.5%, 25%, and 50% transmittance.