Abstract: A daylighting system comprising one or more light redirecting elements and a horizontal slat Venetian blind. The light redirecting elements are inserted between the slats of the Venetian blind and are supported between the slats and the outer strings of the Venetian blind. Each light redirecting element is a thin strip of reflective material formed into an angle section. The upper arm of the angle section reflects sunlight upwards through the Venetian blind and deeply into the interior of the building. The side arm of the angle section reflects sunlight back out of the window. The reflecting surface of an upper arm of a light redirecting element is treated to reflect light diffusely into a narrow angular range. The reflecting surface of a side arm of a light redirecting element is treated to reflect light diffusely into a wide angular range. The daylighting system is installed in the window of a building to redirect sunlight on to the ceiling of the building to improve natural illumination in the building.

Abstract: A self-supporting roof lighting system that accepts low elevation light and rejects high elevation light may be produced by making arrays of parallel laser cuts through, or partly through, a flat sheet of transparent acrylic, cutting the segment containing the arrays from the sheet, positioning the segment over linear heating elements to soften the acrylic along the lines between adjoining laser cut arrays, folding the segment along the softened lines through the angle necessary to form a multi-faceted structure of saddle, pyramid or higher order form and allowing this structure to cool and solidify to produce a self-supporting angle-selective roof lighting system with an array of light redirecting laser cuts on each facet.

Abstract: A method for producing a light channelling panel by making an array of angled cuts in a first transparent plastic sheet, making a similarly spaced array of angled cuts in a second plastic sheet, transposing or flipping the second sheet and fixing it in contact with the first sheet to form a panel with an array of internal light channels. Alternatively, by making an array of angled cuts in the surface of a transparent plastic sheet and an array of similarly spaced angled cuts in the opposite surface of the transparent plastic sheet to form a panel with an array of internal light channels. Said light channelling panel when positioned in a window of a building channels substantially all sunlight incident on the panel through the panel and over the ceiling in the building thereby illuminating the building with daylight and shading work areas near the window.

Abstract: A method for producing a light channelling panel by making an array of angled cuts in a first transparent plastic sheet, making a similarly spaced array of angled cuts in a second plastic sheet, transposing or flipping the second sheet and fixing it in contact with the first sheet to form a panel with an array of internal light channels. Alternatively, by making an array of angled cuts in the surface of a transparent plastic sheet and an array of similarly spaced angled cuts in the opposite surface of the transparent plastic sheet to form a panel with an array of internal light channels. Said light channelling panel when positioned in a window of a building channels substantially all sunlight incident on the panel through the panel and over the ceiling in the building thereby illuminating the building with daylight and shading work areas near the window.

Abstract: A self-supporting roof lighting system that accepts low elevation light and rejects high elevation light may be produced by making arrays of parallel laser cuts through, or partly through, a flat sheet of transparent acrylic, cutting the segment containing the arrays from the sheet, positioning the segment over linear heating elements to soften the acrylic along the lines between adjoining laser cut arrays, folding the segment along the softened lines through the angle necessary to form a multi-faceted structure of saddle, pyramid or higher order form and allowing this structure to cool and solidify to produce a self-supporting angle-selective roof lighting system with an array of light redirecting laser cuts on each facet.