Enhancement of ECE SuperPin Curved Reflex Reflector by the Use of Double Pins with Corner Cubes

Le, Lanh-Thanh; Le, Hien-Thanh; Chen, Ming-Jui; Luo, Guo‐Feng; Liao, Hsing-Yuan; Ma, Hsin-Yi; Lee, Hsiao-Yi

doi:10.3390/app9081555

Cited by 4 publications

(6 citation statements)

References 16 publications

(39 reference statements)

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“…We can move the three retro-reflected rays on the top into one direction and the other three into another direction by using the different angles between each pair of facets. In this way, the optical performance of a corner cube can be improved as the retro-reflected energy in a given direction is tripled; this is called superpin technology [24]. The superpin technology is characterized by the unique structure of corner cubes to concentrate the retroreflected light into two zones insteads of six zones, shown in Figure 2c.…”

Section: Principlesmentioning

confidence: 99%

“…In this paper, a new reflex reflector structure called SuperPin Plus is proposed for fitting both the ECE and SAE regulations, shown in Figure 1c. SuperPin Plus's principle is based on the structure of SuperPin [24], which was developed by the difference in the value of dihedral angle.…”

Section: Introductionmentioning

confidence: 99%

“…It is shown that a 32% larger working area can be achieved if double pin groups are used to construct corner cubes instead of the single pin arrangement in a curved SuperPin Plus reflex reflector. Accoding to the standards of SAE and ECE, the coefficient of luminous intensity RI should be higher than the threshold values within the 20° angle of light incidence [23][24][25]. The vehicle signage performance RI is evaluated by the ratio of the strength of the reflected light ϕRLI (retro-reflected light intensity) to the amount of light that falls on the retro-reflector ϕILI (incident light illuminance), as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…The formula of retro-reflected light by (a) the EU Economic Commission for Europe (ECE) regular in ([16],Figure 1), (b) the ECE SuperPin in ([24],Figure 1), and (c) the ECE and US Society of Automotive Engineers (SAE) SuperPin Plus reflex reflector, an extension of SuperPin[24].…”

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confidence: 99%

“…(a) A 3D design of flat corner cube SuperPin Plus retro-reflector; (b) a group of pins and its reflecting surfaces (blue line inner region); and (c) SuperPin retroreflected light pattern[24].…”

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ECE/SAE Dual Functional SuperPin Plus Curved Reflex Reflector by Use of New Structured Corner Cubes

Chen

et al. 2020

Applied Sciences

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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.

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Section: Principlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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