Total internal reflection micro lens array
First Claim
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1. A total internal reflection optical microstructure array comprising:
- an optical incidence surface;
a plurality of optical microstructures formed on a surface opposite to the optical incidence surface, each of the optical microstructures comprising a plurality of concentric and annular outwardly-extending prismatic units, each of the prismatic units having a reflecting surface and a refractive surface,wherein light incident from the optical incidence surface is totally internally reflected by the reflecting surface of the prismatic unit, and the reflected light is refracted by the refractive surface of the prismatic unit and exits,wherein a first prismatic unit close to the center of the optical microstructure has a more elevated position than a second prismatic unit close to the edge of the optical microstructure with respect to the optical incidence surface.
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Abstract
The invention relates to a total internal reflection micro lens array for a wide-angle lighting system. The micro lens array includes a plurality of Fresnel lens structures formed on a same optical incidence surface. Each of the Fresnel lens structure includes a plurality of grooves, each having a reflecting surface and a refractive surface. Incoming radiation incident through the incidence surface of the lens structure is internally totally reflected by the reflecting surface, refracted by the refractive surface and exits the lens structure.
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Citations
7 Claims
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1. A total internal reflection optical microstructure array comprising:
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an optical incidence surface; a plurality of optical microstructures formed on a surface opposite to the optical incidence surface, each of the optical microstructures comprising a plurality of concentric and annular outwardly-extending prismatic units, each of the prismatic units having a reflecting surface and a refractive surface, wherein light incident from the optical incidence surface is totally internally reflected by the reflecting surface of the prismatic unit, and the reflected light is refracted by the refractive surface of the prismatic unit and exits, wherein a first prismatic unit close to the center of the optical microstructure has a more elevated position than a second prismatic unit close to the edge of the optical microstructure with respect to the optical incidence surface. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification