Chromaticity

   Shown in the table below are trichromatic coordinates and luminous transmittance values for describing colors of stock filters in accordance with C.I.E. system. These data are included only for those glasses useful in colorimetry. The data are based on C.I.E. illuminant A which, for practical purposes, is a tungsten filament lamp operating at rated voltage.  It should be noted that capital "Y" gives integrated visible luminous transmittance for illuminant A.

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