Abstract
We propose and demonstrate, using optical experiments, a new reflex reflector structure called SuperPin Plus. The structure is composed of special pin groups with dihedral-angle offsets in corner cubes. One of the specular features brought by this new design is that it can comply with both the US SAE (US Society of Automotive Engineers) standard and the EU ECE (Economic Commission for Europe) standard, so that manufacturing costs of reflex reflector for both European and American automobile markets can be reduced. By using genetic algorithms for optimization, the angles and the positions of the pins, which are the building elements of corner cube reflectors, serve as the parameters to tune up the performance of the SuperPin Plus curved reflex reflector. Compared with conventional ECE flat regular retro-reflectors, we found that not only can we achieve a 41% higher retro-reflection efficiency with the ECE SuperPin Plus flat reflex reflector, but that SuperPin Plus can also act as a reflex reflector within SAE standards. In addition, we demonstrate that the retro-reflection efficiency is 30.5% higher (SAE standard) and 42.7% higher (ECE standard), and that a 32% increase in working area can be achieved if double pin groups are used to construct the corner cubes instead of a single pin arrangement, in a curved SuperPin Plus reflex reflector.
Highlights
A reflex reflector is an optical device that allows light to be reflected in a direction that is parallel to that of the source [1,2,3]
20,002 millicandela the regular cuberetro-reflector retro-reflector (CCR) and the SuperPin Plus CCR, the results show that the light reflection performance sample under
Plus curved CCR result in their retro-reflected light intensity distributions for an incident beam in conclude that it is difficult for the posterior area to meet ECE or Society of Automotive Engineers (SAE) regulation requirements
Summary
A reflex reflector is an optical device that allows light to be reflected in a direction that is parallel to that of the source [1,2,3]. Effective retro-reflection ability, SuperPin retro-reflectors have been replacing regular retroreflectors in According to regulations of the US Society of Automotive Engineers (SAE) and EU Economic vehicle application markets [17,21,23]. Plus reflex reflectors with thereflex new group 45 in structure, so one type of pin is enough to handle the production of ECE and SAE corner cube structure are proposed and demonstrated to meet the ECE/SAE dual function reflectors. Bydemonstrated using genetictoalgorithms for optimization, we use the angles corner cube structure are proposed and meet the ECE/SAE dual function requirements and the positions of the pins serving as the building elements of corner cube reflectors as the through experiments. Corner cubes instead of the single pin arrangement in a curved SuperPin Plus reflex reflector.
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