Schott neutral density glasses, with the designation NG, have, as their name suggests, a very constant transmission over a large spectral range, especially in the visible range. The degree of desired filtering can be regulated by the use of different NG filter types and by thicknesses within a particular filter type.  Their use is indicated when the user requires a defined weakening of the intensity of radiation sources over a large spectral range. They are of particular use in photography and other light measuring instruments where an even reduction of light is desirable.

   The filter glass types are listed below. To view the linear transmission curves and data sheet for each, simply point and click on the glass type of your choice.

For more information or prices on Schott color filters please contact us.

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