Combination specular and diffuse image chmsl

B - Operations – Transporting – 60 – Q

Patent

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Details

B60Q 1/44 (2006.01) B60Q 1/30 (2006.01) G03H 1/26 (2006.01) F21Q 1/00 (1995.01)

Patent

CA 2135940

A hologram structure for use in a holographic center high mounted stoplight system for a vehicle. The hologram structure includes an illumination source (30) for providing a reconstruction beam, a first array (31) of non-overlapping hologram cells and non-hologram cells, and a second array (32) of non-overlapping hologram and non-hologram cells. Each hologram cell of the first array produces a specular image that is viewable in a first predetermined angular field pursuant to diffraction of a portion of the reconstruction beam, and each hologram cell of the second array produces a diffuse image that is viewable in a second predetermined angular field pursuant to diffraction of a portion of the reconstruction beam. The specular images and diffuse images produced by the first and second holograms form stoplight illumination.

Cette invention concerne une structure d'hologramme pour feu d'arrêt à centre holographique monté en partie haute d'un véhicule. L'objet de l'invention comprend une source lumineuse (30) émettant un faisceau de restitution, un premier réseau (31) de cellules holographiques non chevauchantes et de cellules non holographiques et un second réseau (32) de cellules du même type. Chaque cellule holographique du premier réseau produit une image spéculaire visible dans un premier champ angulaire prédéterminé en raison de la diffraction d'une partie du faisceau de restitution, et chaque cellule du second réseau produit une image diffuse visible dans second champ angulaire prédéterminé en raison de la diffraction d'une partie dudit faisceau. Les images spéculaires et diffuses produits respectivement par les deux réseaux d'hologrammes forment le faisceau lumineux du feu d'arrêt.

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