摘要:
An identification device 10 comprises a retroreflector 12 for receiving an incident beam of radiation 14 from a detection unit 16 remote from the device and retroreflecting the incident beam back to the detection unit so that the device can be identified. The retroflector comprises a substantially spherical graded refractive index lens 20; a reflective part 22 for retroreflecting the incident radiation beam passing through the lens; and a tagging layer 24 disposed between the lens and the reflective part, wherein the tagging layer is selected to cause the retroreflected beam to comprise a spectrum of radiation which is characteristic of the device and which can be identified by the detection unit by comparison with a predetermined spectrum.
摘要:
Le domaine général de l'invention est celui des systèmes de détection de la posture d'un objet mobile comprenant - un dispositif fixe électro-optique d'orientation connue comprenant une source d'émission, un capteur d'images et des moyens d'analyse d'images, et - un ensemble optique comprenant un rétroréflecteur optique disposé sur l'objet mobile. Le rétroréflecteur optique du système selon l'invention est une sphère optique (RS) d'indice variable comportant un hémisphère transparent et un hémisphère réfléchissant. Elle comporte un maillage comportant au moins trois fils opaques, d'épaisseur faible et d'agencement géométrique connu. L'image du rétroréflecteur éclairé par la source forme un reflet (RL) sur le capteur d'images, ledit reflet comportant au moins les deux images de l'ombre d'un des trois fils. Les moyens d'analyse d'image détectent l'orientation de la ligne de fuite (E, F, G, H1) donnée par les dites images, ladite orientation étant représentative d'un des paramètres de la posture de l'objet mobile.
摘要:
Retroreflective elements and articles that include such elements. The retroreflective elements (100) include a solid spherical core (110) having an outer surface. A first complete concentric optical interference layer (112) overlays the outer surface of the core providing a first interface between the core and the first optical interference layer, and a second complete concentric optical interference layer (122) overlays the first optical interference layer to provide a second interface between the first optical interference layer and the second optical interference layer. In some embodiments, a third complete concentric optical interference layer overlays the second optical interference layer to provide a third interface between the second optical interference layer and the third optical interference layer. The retroreflective articles include a substrate having a first major surface and a second major surface with a plurality of the retroref lective elements affixed along the first major surface of the substrate.
摘要:
Compensation for spherical aberration in retroreflectors to improve the retroreflector performance. A retroreflector has at least two concentric spherical layers. A first of the layers is of uniform refractive index n! surrounding a second of the layers of uniform refractive index n2. The refractive indices satisfy the criteria n1> n2. A retroreflector is formed as a sphere having a predetermined refractive index and radius, such that spherical aberration of incident radiation is at least partially compensated for by primary defocus.
摘要:
A retroreflective function member which exhibits better retroreflective properties than a cube corner type retroreflective function member which excels most in the retroreflective properties is provided. A retroreflective function member 1 is formed by injection molding transparent acrylic resin to provide a substantially plate-shape of which the upper surface 2, the bottom surface 3, and right and left surfaces 4 and 5 are flat. The front surface 6 is adapted to serve as the incoming and outgoing surfaces and aluminum is deposited on the rear surface 7 to be used as a reflective surface. The outside of the rear surface 7 is protected by a resin 8.
摘要:
Window glass having sun-facing daylight redirecting optical structures with an embedded surface diffuser patterned on them. The optical structures are generally linear and formed from a repeating unit cell. Each unit cell has a base, two or more peaks opposite the base, and at least one curved side between the base and the peaks. The other sides between the base and the peaks can be substantially straight, curved, or a series of facets approximating a curve.
摘要:
Retroreflective articles are provided in the form of garments, fibers and filaments made with retroreflective elements that each include a solid spherical core (110) with an outer core surface, the outer core surface (115). providing a first interface; a first complete concentric optical interference layer (120) having an inner surface overlying the outer core surface (115) and an outer surface (125), the outer surface of the first complete concentric optical interference layer providing a second interface. In some embodiments, the retroreflective elements each include a second complete concentric optical interference layer having an inner surface overlying the outer surface of the first complete concentric optical interference layer and an outer surface, the outer surface of the second complete concentric optical interference layer providing a third interface. In other embodiments, the retroreflective elements each further include a third complete concentric optical interference layer having an inner surface overlying the outer surface of the second complete concentric optical interference layer and an outer surface, the outer surface of the third complete concentric optical interference layer providing a fourth interface. The garments include a surface having a plurality of the foregoing retroreflective elements disposed on the surface. The fibers include an elongate fibrous body having a plurality of the retroreflective elements adhered to the fibrous body. The retroreflective filaments each include a hollow, transparent, tubular member having a plurality of the retroreflective elements contained within the tubular member.