2011•IOP Conference Series Materials Science and EngineeringOpen access

Evaluation of retro-reflective coating performance by reflectance and perceived relative brightness measurements

Kaiva Luse, Anete Paušus, Varis Karitans, Māris Ozoliņš, Madara Tukisa

Abstract

Retro-reflective properties of six types and five different colors or retro-reflective materials were discussed in this paper. Reflectance optical indicatrix of samples was determined and compared to obtained psychophyisical data of perceived brightness of human observer. Microscopic structure of the retro-reflective active regions of RR's was studied. Statistically significant differences in reflectivity and brightness of various types and colors of RR's were found.

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Key concepts: Brightness, Reflectivity, Retroreflector, Observer (physics), Optics, Coating, Materials science, Reflection (computer programming)