Neutral Density Filters

A thin metal layer is deposited under high vacuum on a substrate of optically polished glass or quartz in such a way that part of the incident light is transmitted, part is reflected and the rest is absorbed by the metal layer.

By specific modification of the evaporation parameters, ND-filters with different transmission values are created.

The ND- filters are classified on the basis of the transmission or the optical density of the filter.

Data sheet standard

Data sheet OEM

Application

  • Photometer
  • Detectors
  • Cameras

Properties

  • High thermal load capacity
  • Dense layers, tropicalized
  • Extremely long service life