Neutral Density Filters
KUPO Optics provides Neutral Density Filters (ND Filters) that are able to evenly reduce the transmission in visible wavelength region. ND filter only reduces the intensity of visible light without changing the color scheme. The vividness of the imaging will not be affected.

Features
● Perfect piece-to-piece, batch-to-batch consistency
● Evenly reducing the intensity of visible light
Examples of Applications
● Photography
● Photomicrography
● Machine Vision
Borosilicate Glass (D263T)
● Thickness: 0.21mm, 0.3mm, 0.55mm
● Heat Resistance: Up to 450℃
General Specification
● Spectral Tolerance: 400~700nm Tavg +/- 3%
● Available Substrate: See Glass Substrates under Products Page
● Humidity, Adhesion, and Abrasion: MIL-M-13508C
NDF-001

Reference color #LEE 209
400~700nm Tavg = 40% +/- 3%

NDF-002

Reference color #LEE 210
400~700nm Tavg = 20% +/- 3%

NDF-003

Reference color #LEE 211
400~700nm Tavg = 6.5% +/- 1.5%

NDF-004

Reference color #LEE 299
400~700nm Tavg = 2.5% +/- 1%
