초록 ▼

The present invention is directed to light collection systems, the system comprising at least one light receiving element, selected from the group consisting of: a window, a photovoltaic element, a heating element, a light guiding element and combinations thereof, and at least one light reflector-de

The present invention is directed to light collection systems, the system comprising at least one light receiving element, selected from the group consisting of: a window, a photovoltaic element, a heating element, a light guiding element and combinations thereof, and at least one light reflector-deflector element, each element comprising a front light receiving surface, a rear surface, and a transparent volume, disposed between the front light receiving surface and the rear surface, the transparent layer being of a higher refractive index than of its surrounding, wherein the transparent volume comprises an asymmetric pattern which is configured to at least partially reflect light by internal reflection and direct the light within the element, reflect some light off said front light receiving surface, reflect, deflect and guide light within the light reflector-deflector element; and direct light through the front light receiving surface towards the at least one light receiving element.

대표청구항 ▼

1. A light collection system for solar light collection and conversion comprising: several rows of tilted photo-voltaic (PV) convertor modules spaced from each other at a certain distance;several rows of stationary solar light collector elements placed in between the rows of the PV convertors in loc

1. A light collection system for solar light collection and conversion comprising: several rows of tilted photo-voltaic (PV) convertor modules spaced from each other at a certain distance;several rows of stationary solar light collector elements placed in between the rows of the PV convertors in locations wherein a space is left free, the solar light collector elements tilted to direct the light to the PV convertors and wherein each solar light collector includes at least one solar light reflecting and one solar light deflecting element, directing the solar light impinging at large and small angles at the space left free between rows of modules, to the PV convertors and enhancing the uniformity of the solar light directed from the solar light collector to the PV convertor. 2. The light collection system according to claim 1, wherein the solar light collector element is a transparent wedged volume and having a top side that is substantially thinner than a bottom side. 3. The light collection system according to claim 1, wherein the solar light collector element further includes a front face, a back face, and a plurality of side faces and wherein the back face, and the side faces are reflective. 4. The light collection system according to claim 1, wherein the solar light collector element acts on solar light impinging on it at small angular incidence angles solar light by diverting the solar light towards a light receiving surface of a solar convertor and on solar light impinging at large angular incidence angles by coupling the solar light into light guiding, to further direct the light towards the solar light convertor and wherein the solar light reflected off incidence surface is directed to the solar light convertor. 5. The light collection system according to claim 1, wherein the solar light collector elements further comprise patterned optical elements, and wherein light is directed towards the solar light convertors by reflection off the front surface of elements, by light guiding and subsequent controlled out-coupling, and by total internal reflection and deflection. 6. The light collection system according to claim 1, wherein the solar light collector element further comprises a patterned optical element, and wherein the pattern is at least one of a group of patterns consisting of a lenslet array, an asymmetric lenslet array, a prismatic pattern, and a curved structure with a varying wedge angle, with asymmetry larger than 0.55 and smaller than 0.45 and wherein the asymmetry of the pattern is measured by ratio between subsequent distances of minima and maxima at the pattern elements along a line parallel to a plane of symmetry. 7. The light collection system according to claim 1, wherein the solar light collector element further comprises a patterned optical element, and wherein the pattern is at least one of a group of patterns consisting of a lenslet array, an asymmetric lenslet array, a prismatic pattern, and a curved structure with a varying wedge angle, with asymmetry larger than 0.55 and smaller than 0.45 and wherein the asymmetry of the pattern is measured by ratio between subsequent distances of minima and maxima at the pattern elements along a line parallel to a plane of symmetry and wherein at least one of surfaces of the solar light collector element is convex, or prismatic or carrying a repetitive convex pattern in a second direction. 8. The light collection system according to claim 1, wherein the solar light collector element further comprises a patterned optical element, and wherein the pattern is at least one of a group of patterns consisting of a lenslet array, an asymmetric lenslet array, a prismatic pattern, and a curved structure with a varying wedge angle, with asymmetry larger than 0.55 and smaller than 0.45 and wherein the asymmetry of the pattern is measured by ratio between subsequent distances of minima and maxima at the pattern elements along a line parallel to a plane of symmetry and wherein the solar light collector element further comprises an additional layer below the rear surface of said patterned optical element to handle the solar light that has not been reflected by the rear surface and wherein the layer is at least one of a group of a reflective surface such as a coated glass mirror, a layer having a white pattern, a layer having a bump pattern, a layer having a fine groove pattern and a transparent plate, enabling refection or diffuse reflection of the passing light towards the convertor element. 9. The light collection and conversion according to claim 1, wherein the solar light collector comprises a patterned surface and a cover plate that protect said patterned surface of the solar light collector element and wherein the cover plate together with the solar light collector form a mechanically stiffer structure. 10. The light collection system according to claim 1, wherein the solar light collector element further comprises an asymmetric optical elements. 11. The light collection system according to claim 1, wherein the solar light collector element further comprises an asymmetric optical element and wherein the solar light collector element is set in asymmetry with respect to solar position and motion throughout a year, such as partially facing East or West. 12. The light collection system according to claim 1, wherein the solar light collectors are tilted at angles ranging from 10 degree to 60 degree and wherein the solar light collector tilt angle is opposite to tilt angle of the solar light convertors. 13. The light collection system according to claim 1, wherein the angle between a front light receiving surface of the solar light convertor and a front surface of the reflector-deflector element is in the range between 110 degrees and 150 degrees. 14. A method for solar light collection and conversion comprising: providing several rows of stationary tilted conventional photo-voltaic (PV) convertor modules spaced from each other at a certain distance and several rows of solar light collector elements placed in between the rows of the PV convertor modules in locations wherein a space is left free; andcollecting and directing the solar light impinging at large and small angles at the space left free between rows of modules, directing the collected light to the PV convertors and enhancing the uniformity of the solar light impinging at the convertor. 15. The method for solar light collection and conversion according to claim 14, wherein collecting solar light from the solar light source includes combining and mixing: solar light from at least one light-guiding element;solar light from at least one refection-deflection element; andsolar light from at least one reflection element; anddisposing a light collector to direct the combined light towards at least one solar light convertor receiving surface, further increasing uniformity and efficiency over a large solar light angular range. 16. The method for solar light collection and conversion according to claim 14, wherein the solar light collector element acts on impinging on it at small angular incidence angles solar light by diverting the solar light towards a light receiving surface of the light convertor and on solar light impinging at large angular incidence angles by coupling the solar light into light guiding, and further directing the light towards the convertor.