Abstract
Their physical origin distinguishes chemical colors and structural colors, the latter being subdivided into prismatic colors and interference colors. Colors of optical coatings are interference colors. A short history of interference colors is given starting from Isaac Newton, and then continuing with Thomas Young (interference in optics), Leopoldo Nobili (electrochemical “metallocromia”), David Brewster, A. Michel-Lévy (interference color chart), J.F. Gabriel Lippmann (interference color photography), and Dobrowolski (anticounterfeiting coatings). A concise review of standard colorimetry (psychophysical and psychometric colorimetry) is given with the aim of introducing the colorimetry of the optical coatings. A gonio-apparent color measurement technique is presented with the updated multiangle spectrophotometers. As an example, classical computations of colors of optical coatings are shown.
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