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US 8,011,800 B2Granted
Device for producing isotropic ambient light
AssigneesRegenerer, Optical System & Research for Industry and Science Osyris
InventorJaouad Zemmouri
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AssigneesRegenerer, Optical System & Research for Industry and Science Osyris
InventorJaouad Zemmouri
Estimating the term…
The invention concerns a device for producing isotropic ambient light, comprising: at least one extended light source including several punctual light sources spaced apart along two orthogonal axes; a waveguide for propagating by total reflections in a propagating direction perpendicular to the plane, the light beams produced by the punctual light sources; and means for scattering the light in the waveguide output. The dimension of the waveguide along said propagating direction is further sufficient to allow the light intensity curve which is detected, for each light source, in the waveguide output along one of the two axes and in a detecting range corresponding to the waveguide output section along said axis, to have a maximum value (Imax) and a minimum value (Imin) which satisfy the following criterion of quasi-uniformity (Imax-Imoy) ≦0.3Imoy and (Imoy-Imin) ≦0.3Imoy, Imoy being the average value of the light intensity levels detected along said axis.
A device for producing isotropic ambient light, characterised in that it includes at least one extended light source, which comprises several punctual light sources spaced apart along two orthogonal axes, a wave guide, which enables light beams produced by the punctual light sources to be propagated, by total reflections and in a propagation direction perpendicular to a plane, and a means for scattering the light at an exit of the wave guide, and in that a dimension of the wave guide along said propagation direction is sufficient for a light intensity curve which is detected for each light source at the exit of the wave guide along one of the two axes and in a detection range corresponding to a section of the exit of the wave guide along said one of the two axes, to display a maximum value (Imax) and a minimum value (Imin), with respect to the following criterion of quasi-uniformity:
Dependencies are inferred from the claim text.