Robust Digital Glossmeter

Abstract It has been shown that gloss measurement results are not affected by using narrow band green light instead of CIE Illuminant A and Standard Photometric Observer. Thus a green light emitting diode could be used as light source. This has the following advantages: The source is robust, insensitive to shocks and vibrations. It can be easily modulated enabling a system insensitive to external stray light. A double beam technique enables a drift free operation. The first model of the new LED-glossmeter works with ISO Standard 20°, 60° and 85° geometries. (A second model for the draft ISO standard for the 75° measuring geometry is under construction.) Gloss is displayed on a 3, 5 digit display. Possibilities exist for data transfer and thus to use the equipment as an on-line qlossmeter as well.