Illumination system
First Claim
1. An illumination system comprising:
- an array of light sources arranged in a pre-determined manner in a first plane wherein dsource is a characteristic dimension of the spatial arrangement of the light sources in the first plane representing the distance between adjacent light sources,an array of associated lenses arranged in substantially the same pre-determined manner in a second plane, each lens having substantially the same focal distance flens and having a distance between a centerpoint of each of said associated lenses of dlens, said array of light sources and said array of lenses rotatably mounted relative to each other;
the second plane being arranged substantially parallel to the first plane,the array of lenses being provided at a plane distance dplane from the array of light sources, the plane distance dplane being substantially equal to the focal distance flens of the lenses,said rotatable mounting of said plurality of lenses and said plurality of light sources relative to each other sufficient for displacing the array of lenses with respect to the array of light sources parallel to the first plane so as to obtain a plurality of directional light beams projecting spots on a projection plane arranged at a projection distance dprojection from the illumination system, wherein dprojection≧
10×
dsource and dprojection≧
10×
dplane, wherein dlens<
dsource, wherein dlens is a characteristic dimension of the spatial arrangement of the lenses;
wherein said dimension dlens<
dsource, causes said plurality of directed light beams to overlap to form a single spot when said array of lenses are in a first rotational position relative to said array of light sources;
a rotatable mount positioning said array of lenses and said array of light sources in a second rotational position repositioning said single spot without tilting said illumination system and maintaining substantially the same distance of said dplane;
said rotatable mount positioning said array of lenses and said array of light sources in a third rotational position creating a broadened spot relative to said single spot wherein said plurality of directional beams overlap.
3 Assignments
0 Petitions
Accused Products
Abstract
The illumination system has an array of light sources (1, 1′, . . . ) such as an array of light emitting diodes arranged in a pre-determined manner in a first plane (11), wherein dsource is a characteristic dimension of the spatial arrangement of the light sources in the first plane. An array of associated lenses (2, 2′, . . . ) is arranged in substantially the same pre-determined manner in a second plane (12). Each lens has substantially the same focal distance flens. The array of lenses is provided at a plane distance dplane from the array of light sources. The plane distance dplane is substantially equal to the focal distance flens of the lenses. The illumination system has displacement means for displacing the array of lenses with respect to the array of light sources so as to obtain a plurality of directional light beams projecting spots on a projection plane arranged at a projection distance dprojection from the illumination system, wherein dprojection≧10×dsource and dprojection≧10×dplane.
-
Citations
11 Claims
-
1. An illumination system comprising:
-
an array of light sources arranged in a pre-determined manner in a first plane wherein dsource is a characteristic dimension of the spatial arrangement of the light sources in the first plane representing the distance between adjacent light sources, an array of associated lenses arranged in substantially the same pre-determined manner in a second plane, each lens having substantially the same focal distance flens and having a distance between a centerpoint of each of said associated lenses of dlens, said array of light sources and said array of lenses rotatably mounted relative to each other; the second plane being arranged substantially parallel to the first plane, the array of lenses being provided at a plane distance dplane from the array of light sources, the plane distance dplane being substantially equal to the focal distance flens of the lenses, said rotatable mounting of said plurality of lenses and said plurality of light sources relative to each other sufficient for displacing the array of lenses with respect to the array of light sources parallel to the first plane so as to obtain a plurality of directional light beams projecting spots on a projection plane arranged at a projection distance dprojection from the illumination system, wherein dprojection≧
10×
dsource and dprojection≧
10×
dplane, wherein dlens<
dsource, wherein dlens is a characteristic dimension of the spatial arrangement of the lenses;wherein said dimension dlens<
dsource, causes said plurality of directed light beams to overlap to form a single spot when said array of lenses are in a first rotational position relative to said array of light sources;a rotatable mount positioning said array of lenses and said array of light sources in a second rotational position repositioning said single spot without tilting said illumination system and maintaining substantially the same distance of said dplane; said rotatable mount positioning said array of lenses and said array of light sources in a third rotational position creating a broadened spot relative to said single spot wherein said plurality of directional beams overlap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An illumination system comprising:
-
a plurality of light sources arranged in a first plane and a plurality of associated lenses arranged in a second plane, said first plane and said second plane substantially parallel, said plurality of light sources rotatably mounted relative to said plurality of lenses while maintaining substantially the same distance between said light sources and said lenses; wherein said plurality of light sources are in a spatial arrangement dsource in said first plane representing the distance between adjacent light sources, the plurality of lenses being positioned on said plane a distance dplane from said plurality of light sources, wherein said plane distance dplane substantially equal to a focal distance flens of said plurality of lenses and wherein dlens is a dimension of the spatial separation arrangement of said plurality of lenses and the centerpoint of each of said plurality of lenses; said rotatable mounting of said lenses and said light sources relative to each other sufficient for displacing the array of lenses with respect to the array of light sources parallel to the first plane so as to obtain a plurality of directional light beams projecting spots on a projection plane arranged at a projection distance dprojection from said second plane, wherein dprojection≧
10×
dsource and dprojection≧
10×
dplane, wherein dlens<
dsource,wherein said dlens<
dsource, causes said plurality of directed light beams to overlap to form a single spot when said array of lenses are in a first rotational position relative to said array of light sources;said rotatable mount positioning said array of lenses and said array of light sources in a second rotational position repositioning said single spot without tilting said illumination system; said rotatable mount positioning said array of lenses and said array of light sources in a third rotational position creating a broadened spot relative to said single spot wherein said plurality of directional beams overlap.
-
Specification