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NEUTRAL DENSITY FILTERS

GREY FILTERS FOR ARCHIEVING HIGHER CONTRAST IN THE VISIBLE RANGE

Neutral density filters are characterised by a near constant transmittance in the visible range of 400 - 700 nm. The degree of transmission depends upon both; the different NG glass type and the thickness. For filtering tasks that requires a fixed attenuation, specifically tailored neutral density filters are available.

 

 

A neutral density filter can be described by transmission t or absorption as optical density D (D = lg 1/t).Specifically designed neutral filters are available for applications that require a defined attenuation. 

 

 

Beutral desity filters, grey filters for archieving higher contrast in the visible range
Beutral desity filters, grey filters for archieving higher contrast in the visible range