摘要:
L'invention concerne un dispositif de signalisation (1) pour véhicule automobile (300) et mettant en oeuvre au moins un dispositif lumineux (100) agencé pour afficher au moins une image stéréoscopique (121) sur une surface d'affichage (350) dudit véhicule automobile (300), à l'aide d'une source de lumière (40) permettant d'éclairer sélectivement ou collectivement des réseaux de diffraction (13-15) disposés sur ladite surface d'affichage (350) et permettant de réaliser un indicateur de direction et/ou un indicateur d'avertissement et/ou un feu stop. Le dispositif lumineux (100) est piloté par un module de commande et en fonction de l'activation d'une commande d'actionnement du véhicule automobile (300), ladite commande d'actionnement étant associée à un état particulier du véhicule automobile (300) pris en compte par le module de commande. L'invention concerne aussi un procédé de signalisation comprenant une étape de détection de l'état du véhicule automobile (300) et une étape de pilotage du dispositif de signalisation (1).
摘要:
Imaging apparatus and methods using diffraction-based illumination are disclosed. An example apparatus includes a diffraction grating to redirect light from a light source toward a sample to thereby illuminate the sample. The example apparatus also includes an image sensor to detect a diffraction pattern created by the illuminated sample.
摘要:
We describe a window assembly comprising: a window pane comprising a glass or plastic sheet; and a layer of holographic recording medium attached to said glass or plastic sheet; wherein said layer of holographic recording medium has recorded within the medium a volume hologram configured to direct light incident onto said glass or plastic sheet to propagate within a thickness of said glass or plastic sheet. In embodiments the volume hologram is fabricated by recording a transmission hologram and shrinking the recorded hologram to convert the transmission hologram to an edge-directing hologram configured to direct light in a direction to be totally internally reflected within the window pane, for example at greater than 40°, 50°, 60°, 70°, 75° or 80° to a normal to the surface of the hologram.
摘要:
In various embodiments described herein, a device comprising one or more light guides that is optically coupled to one or more photocells is described. The device further comprises one or more light turning films or layers comprising volume or surface diffractive features or holograms. Light incident on the light guides is turned by volume or surface diffractive features or holograms that are reflective or transmissive and guided through the light guides by multiple total internal reflections. The guided light is directed towards the photocells. In certain embodiments, solar energy is also used to power or heat a thermal generator to heat water or produce electricity from steam. Various embodiments may comprise an air gap or an optical isolation layer disposed between the multiple light guides.
摘要:
The invention relates to an optical arrangement and a method for processing an optical wave, comprising a plurality of cells (20, 21) arranged on, into or partly into an optical medium, wherein the cells having a pattern structure formed therein. The pattern structure in each of the cells comprises a plurality of grooves (30). The grooves (30) in at least one of the cells (20, 21) are parallel to each other, and the grooves (30) form a grating (40).
摘要:
Un panneau d'affichage amélioré relativement peu profond comprend un élément de logement servant de support à un hologramme contenant une image holographique qui est contituée par des signes prédéterminés et qui peut être éclairée de façon appropriée pour apparaître à l'observateur comme étant placée à un endroit décalé par rapport à l'emplacement effectif de l'élément d'hologramme du tableau d'affichage. L'élément d'hologramme peut être éclairé par un éclairage venant de l'arrière, de l'avant ou de côté au moyen d'images holographiques obtenues par transmission ou par réflexion. L'un des modes de réalisation de la présente invention peut être combiné avec un volant de direction, dans lequel l'image virtuelle des signes se forme à une profondeur suffisante pour permettre au conducteur de se concentrer sans effort sur les informations des signes du tableau.
摘要:
A backlight device as well as a holographic display including the backlight device and a display panel (6) are provided. The backlight device includes a light guide plate (50) configured to guide light emitted by a light source (10,20), a first holographic optical element (H1) configured to reflect and expand light that has propagated through the light guide plate (50), the first holographic optical element having a multi-layered structure (H11,H12,H111,H112,H112), and a second holographic optical element (H2) configured to divert and focus light diffractively reflected by the first holographic optical element, thereby adding a lens function to the backlight device.
摘要:
A holographic see-through optical device, a stereoscopic imaging system including the same, and a multimedia head mounted system are provided. The holographic see-through optical device includes a micro display; a relay optical system, which relays an image generated by the micro display; at least one waveguide comprising at least two portions having different thicknesses or different refractive indexes; at least one first holographic optical element, which is arranged at one of the two portions; and at least one second holographic optical element, which is arranged at the other one of the two portions.
摘要:
Imaging apparatus and methods using diffraction-based illumination are disclosed. An example apparatus includes a diffraction grating to redirect light from a light source toward a sample to thereby illuminate the sample. The example apparatus also includes an image sensor to detect a diffraction pattern created by the illuminated sample.