Polarization properties of a metal corner-cube retroreflector

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

“…Reflex reflectors, usually composed of cube-corner arrays [1], can reflect light back along vectors that are nearly parallel but with a direction opposite to the incident light [2,3]. Reflex reflectors attached on cars or clothing can increase visibility in the dark for safety [4] and have been applied extensively in vehicle applications [5].…”

“…The vehicle signage performance R I is evaluated by the ratio of the strength of the reflected light (retro-reflected light intensity) to the amount of light that falls on the retro-reflector (incident light illuminance), as shown in Figure 1. R A is the measure of retro-reflection efficiency, defined as the ratio It is usual for reflex reflectors to have a curved shape; for example, to fit the corner of a vehicle [1][2][3][4][5]17]. Cube-corner structures are, thus, distorted to complete the curve, so that their effective working area and reflection efficiency are affected, thus leading to the retro-reflector being against EU ECE regulations [5,11,17].…”

“…2019, 9, 1555 2 of 15 of the flux of incident light to the total flux of the reflected cone [12,15]. Consequently, vehicle signage would be observed to be brighter as its R I value increases [13,16].It is usual for reflex reflectors to have a curved shape; for example, to fit the corner of a vehicle [1][2][3][4][5]17]. Cube-corner structures are, thus, distorted to complete the curve, so that their effective working area and reflection efficiency are affected, thus leading to the retro-reflector being against EU ECE regulations [5,11,17].In this paper, a curved reflex reflector with a new cube-corner structure is proposed and demonstrated.…”

“…It is usual for reflex reflectors to have a curved shape; for example, to fit the corner of a vehicle [1][2][3][4][5]17]. Cube-corner structures are, thus, distorted to complete the curve, so that their effective working area and reflection efficiency are affected, thus leading to the retro-reflector being against EU ECE regulations [5,11,17].…”

Design of a Society of Automotive Engineers Regular Curved Retroreflector for Enhancing Optical Efficiency and Working Area

“…A retroreflector, also called a reflex reflector, can reflect light [1][2][3] back along a vector that is parallel or nearly parallel to but opposite in direction from the light source [4,5], no matter what the incident light angle is [2]. Because of their high tolerance to the direction of incident waves [6], retroreflectors have been used extensively in many applications instead of plane mirrors [2], such as free-space optical communications networks [4], satellites, road signs [7], vehicles [8], and clothing [9,10].…”