Illuminating glazing with incorporated deflector
A lighting glazing includes a first sheet of glass of refractive index n 1 with a first main face, a second main face and a rim; a transparent polymer film in adhesive contact with the second main face of the first sheet, the film having a refractive index n 2< n 1 ; a light source positioned facing the rim of the first sheet of glass, wherein an area of the second main face of the first sheet of glass is provided with a reflecting relief or else is covered with a transparent flat structure, of refractive index n 3 greater than or equal to n 1 , provided with a reflecting relief.
1. A lighting glazing comprising:
a first sheet of glass of refractive index n 1 with a first main face, a second main face and a rim;
a transparent polymer film in adhesive contact with the second main face of the first sheet of glass, said transparent polymer film having a refractive index n 2 <n 1 ;
a second sheet of glass with a first main face, a second main face and a rim, the transparent polymer film being in adhesive contact with the first main face of the second sheet of glass, and
a light source positioned facing the rim of the first sheet of glass,
wherein an area of the second main face of the first sheet of glass is provided with a specular reflecting textured surface, and
wherein the specular reflecting textured surface is a textured surface of Fresnel lens type or of Fresnel prism type.
2. The lighting glazing as claimed in claim 1 , wherein a height of the specular reflecting textured surface is between 5 μm and 1 mm.
3. The lighting glazing as claimed in claim 2 , wherein the height of the specular reflecting textured surface is between 10 μm and 500μm.
4. The lighting glazing as claimed in claim 1 , wherein a metallic layer is present on said specular reflecting textured surface.
5. The lighting glazing as claimed in claim 1 , wherein the refractive index n 2 of the transparent polymer film is less by at least 0.02 than the index n 1 of the first sheet of glass.
6. The lighting glazing as claimed in claim 1 , wherein a coating of low index having a refractive index n 4 less by at least 0.02 than the index n 1 of the first sheet of glass is present on said specular reflecting textured surface.
7. The lighting glazing as claimed in claim 6 , wherein the refractive index n 4 is less by at least 0.1 than the index n 1 of the first sheet of glass.
8. The lighting glazing as claimed in claim 1 , wherein the specular reflecting textured surface is a textured surface of Fresnel prism type, the individual prisms of said textured surface being essentially parallel to the lit rim of the first sheet of glass.
9. The lighting glazing as claimed in claim 1 , wherein the specular reflecting textured surface is a textured surface of Fresnel prism type, the individual prisms of said textured surface having an arched form.
10. A vehicle, comprising a lighting glazing as claimed in claim 1 .
11. The vehicle as claimed in claim 10 , wherein the lighting glazing forms part of the roof of the vehicle.
12. The lighting glazing as claimed in claim 1 , wherein the light source includes a light-emitting diode module.
13. A lighting glazing comprising:
a first sheet of glass of refractive index n 1 with a first main face, a second main face and a rim;
a transparent polymer film in adhesive contact with the second main face of the first sheet of glass, said transparent polymer film having a refractive index n 2 <n 1 ;
a second sheet of glass with a first main face, a second main face and a rim, the transparent polymer film being in adhesive contact with the first main face of the second sheet of glass, and
a light source positioned facing the rim of the first sheet of glass,
wherein an area of the second main face of the first sheet of glass is covered with a transparent flat structure, of refractive index n 3 greater than or equal to n 1 , provided with a specular reflecting textured surface.
14. The lighting glazing as claimed in claim 13 , wherein the transparent flat structure is a film of plastic material, or a silica-based mineral or organo-mineral coating obtained by sol-gel pathway.
15. The lighting glazing as claimed in claim 14 , wherein the plastic material is poly(ethylene terephthalate), polycarbonate, poly(methylmethacrylate), or polystyrene.
16. The lighting glazing as claimed in claim 13 , wherein a height of the specular reflecting textured surface is between 5 μm and 1 mm.
17. The lighting glazing as claimed in claim 16 , wherein the height of the specular reflecting textured surface is between 10 μm and 500 μm.
18. The lighting glazing as claimed in claim 13 , wherein a metallic layer is present on said specular reflecting textured surface.
19. The lighting glazing as claimed in claim 13 , wherein the refractive index n 2 of the transparent polymer film is less by at least 0.02 than the index n 3 of the transparent flat structure.
20. The lighting glazing as claimed in claim 13 , wherein a coating of low index having a refractive index n 4 less by at least 0.02 than the index n 3 of the transparent flat structure is present on said specular reflecting textured surface.
21. The lighting glazing as claimed in claim 20 , wherein the refractive index n 4 is less by at least 0.1 than the index n 3 of the transparent flat structure.
22. The lighting glazing as claimed in claim 13 , wherein the specular reflecting textured surface comprises geometrical patterns consisting of flat or curved surfaces.
23. The lighting glazing as claimed in claim 22 , wherein the specular reflecting textured surface is a regular textured surface with repetitive geometrical patterns.
24. The lighting glazing as claimed in claim 13 , wherein the specular reflecting textured surface is a textured surface of Fresnel lens type or of Fresnel prism type.
25. A vehicle, comprising a lighting glazing as claimed in claim 13 .
26. The vehicle as claimed in claim 25 , wherein the lighting glazing forms part of the roof of the vehicle.
27. The lighting glazing as claimed in claim 13 , wherein the light source includes a light-emitting diode module.