G - Physics – 01 – M
Patent
G - Physics
01
M
G01M 11/00 (2006.01) G03H 1/00 (2006.01) G06K 19/16 (2006.01) G07D 7/12 (2006.01)
Patent
CA 2637586
Methods for evaluating an optically variable device ("OVD") or optically variable media ("OVM") are disclosed. The methods include the steps of applying light of a single wavelength from a calibrated light source to the OVD or OVM; measuring the light diffracted by the OVD or OVM with an integrating sphere; measuring the total incident light on the OVD or OVM; and calculating a diffraction efficiency for the OVD or OVM at the single wavelength based on the measurement of light diffracted and the measurement of total incident light.
L'invention porte sur des procédés d'évaluation de dispositifs ("OVD") et supports ("OVM") à couleur changeante, consistant: à appliquer une lumière monochromatique venant d'une source calibrée au OVD ou au OVM; à mesurer la lumière diffractée par le OVD ou le OVM à l'aide d'une sphère d'intégration; et à calculer le rendement de diffraction du OVD ou du OVM pour la lumière monochromatique en fonction de la mesure de la lumière diffractée et de la mesure de la lumière incidente totale.
Grygier Robert K.
Wieloch Kelan
Applied Extrusion Technologies Inc.
Mcfadden Fincham
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