Illumination device
First Claim
1. An artificial illumination method for reproducing, in an indoor environment, the light and colors of the sun and of the sky, the artificial illumination method comprising:
- artificially producing the simultaneous presence of two different color components of visible light, the two different color components comprising;
diffused skylight, wherein blue light is dominant in the skylight; and
directed sunlight having a low blue light component;
wherein artificially producing the simultaneous presence of the skylight and the sunlight comprises producing the skylight and the sunlight in light cones of different angular divergence, wherein the sunlight is directed in a relatively narrow inner cone and the skylight is directed in a relatively wider cone;
wherein the skylight illuminatesa shadow formed by an object with respect to the sunlight, wherein the object is located in the center of the light cone of the sunlight, andan outer area outside of the light cone of the sunlight, which is not illuminated by the sunlight.
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Abstract
An embodiment of an illumination device comprising a broad band artificial light source and a non-liquid chromatic diffuser transparent to visible light comprising a dispersion of elements of nanometrical dimensions of a first material with of certain refractive index in a second material with different refractive index, wherein the light is scattered producing a separation and different distribution between cold and hot components of the light originally produced by the source, according to a scattering process in “Rayleigh” regime. The device allows illumination effects similar to those of natural outdoor environments to be reproduced in indoor environments.
26 Citations
22 Claims
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1. An artificial illumination method for reproducing, in an indoor environment, the light and colors of the sun and of the sky, the artificial illumination method comprising:
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artificially producing the simultaneous presence of two different color components of visible light, the two different color components comprising; diffused skylight, wherein blue light is dominant in the skylight; and directed sunlight having a low blue light component; wherein artificially producing the simultaneous presence of the skylight and the sunlight comprises producing the skylight and the sunlight in light cones of different angular divergence, wherein the sunlight is directed in a relatively narrow inner cone and the skylight is directed in a relatively wider cone; wherein the skylight illuminates a shadow formed by an object with respect to the sunlight, wherein the object is located in the center of the light cone of the sunlight, and an outer area outside of the light cone of the sunlight, which is not illuminated by the sunlight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 18, 19, 20, 21, 22)
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12. An artificial illumination device for reproducing, in an indoor environment, sunlight and skylight, the artificial illumination device comprising:
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a broad-band artificial light source that emits light of broad visible spectrum; and a chromatic diffuser located downstream of the broad-band artificial light source, wherein the chromatic diffuser is configured to generate the skylight by scattering blue light, which is dominant in skylight, and to generate the sunlight by transmitting the remaining light; wherein the chromatic diffuser is configured to emit the skylight and the sunlight in light cones of different angular divergence, a narrow inner cone of sunlight and a wider cone of skylight such that the skylight illuminates a shadow formed by an object with respect to the sunlight, the object being located in the center of the light cone of the sunlight, and an outer area outside the light cone of the sunlight, which is not illuminated by the sunlight. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification