The present disclosure provides lamination transfer films and use of the lamination transfer films, particular in the fabrication of architectural glass elements, such as those used in Insulated Glass Units (IGUs). The lamination transfer films may be used to transfer functional layers and structures. The lamination transfer films may include a support film that can be removed during the transfer process, and the transferred materials are primarily inorganic. The resulting transferred structures on glass generally have high photo- and thermal-stability, and therefore can successfully be applied to the glass surfaces that are interior to the cavity within an IGU. The lamination transfer films can also be patterned such that macroscopic patterns of microoptical elements can be applied on a glass surface.

A solar light system may include two stages of optical concentration with intermediate removal of infrared radiation between the optical concentration stages. A second stage of optical concentration may prepare multiple concentrating beams of processed solar radiation with visible light with each such concentrating beam directed to a different corresponding light conduit for transmission to an interior space for interior lighting. System modularization may provide flexibility to accommodate a variety of interior lighting applications.

A solar light system may include two stages of optical concentration with intermediate removal of infrared radiation between the optical concentration stages. A second stage of optical concentration may prepare multiple concentrating beams of processed solar radiation with visible light with each such concentrating beam directed to a different corresponding light conduit for transmission to an interior space for interior lighting. System modularization may provide flexibility to accommodate a variety of interior lighting applications.

A passive illuminator includes a luminescent region with a semiconductor material that absorbs first photons having energy greater than or equal to a threshold energy. In response to absorbing the first photons, the semiconductor material emits second photons, through a spontaneous emission process, having less energy than the first photons. A waveguide is optically coupled to the luminescent region to transport the second photons a distance from the luminescent region. An extraction region optically coupled to the waveguide to emit the second photons, and the waveguide is disposed between the extraction region and the luminescent region.

The present invention discloses an improved light transmitting plastic panel (100) used in buildings for providing a variable daylight either during a day or in various areas of the building. The light transmitting plastic panel (100) consists of two transparent plates (102A, 102B) and a plurality of transparent hollow cells of V-type (104A, 104B) and rhombus shaped cells (106) located in between these plates (102A, 102B). In particular, a structure of the hollow cells is a repetitive sequence of one rhombus cell (106) in between two V-type cells (104A, 104B). Further, some of the hollow cells are made opaque with a predetermined pattern. With this specific structure, the variable daylight is achieved based on a time of day. In another aspect of the invention, differential daylight is provided for different areas of the building by forming a non-continuous flow pattern of opaque hollow cells across the length of the light transmitting plastic panel (100).

There is provided a unit for light conversion in a building. The unit comprises a solar panel comprising photovoltaic cells without any light-absorbing or light-reflecting coating such as to be raw. The photovoltaic cells can have a wavelength range of conversion optimized for natural sunlight. The unit further comprises an enclosure surrounding the solar panel and preventing the exposure of the solar panel from direct light from outside the enclosure, the enclosure comprising an input. There is provided a light guide comprising an optical fiber and adapted for optical connection to the light collector, the light guide being connectable to the enclosure via the input, the light guide having an output end located by the input of the enclosure and directed toward a surface of the photovoltaic cells for illumination thereof. A light collector is provided outside the building for collecting sunlight and guiding the sunlight into the light guide.

A system includes light processing elements, arranged in a respective installation area and combined with a respective construction, at least partially above and/or next to an occupational or passage space, whereby said light processing elements or respective constructions produce a general light distribution over said occupational or passage space, that is more favorable in terms of visual performance and comfort, and that may assist and adjust to activities requiring different levels thereof. The system is used for energy and/or information conversion and distribution, as part of one construction or clusters of constructions, for example disposed along traffic ways.

A retractable window covering for natural illumination of building interiors by redirecting the incident daylight at angles that promote its deeper penetration into the interior space. The window covering comprises an optically transmissive, flexible polymeric sheet having reflective surfaces incorporated into its material and configured to redirect at least a portion of light propagating through the sheet towards a desired direction. The window covering is operable from a closed to an open position so as to increase or decrease the amount of redirected and/or admitted light.

A light box is designed to receive sunlight guided through optical-fibers and to divert it through optics onto a photovoltaic chip which converts sunlight into electrical energy. The optics can be arranged as a prism or a reflective surface. The chip is not integrated with the light box.

A sunlight-based projector system (3) is disclosed for providing a direct light beam (5). The projector system (3) comprises a sunlight receiving unit (9) with a collector system (13), a plurality of optical fibers (15), and a plurality of fiber output channels (44). The collector system (13) collects natural outdoor light, and couples the collected light into the plurality of optical fibers (15). The projector system (3) comprises further a sunlight forming unit (11) with a plurality of optical collimator units (47) arranged in a two-dimensional array, wherein each optical collimator unit (47) receives the respective fiber output light (45) and comprises at least one optical collimator (49) for reducing the angular distribution width of the received divergent fiber output light (45). Output areas of the plurality of optical collimator units (47) form essentially a continuously extending large light-emitting face (53) of the sunlight forming unit (11) for emitting an essentially collimated light beam (5). The generated direct light beam (5) may be used together with diffused light generating areal units to provide a sun-sky imitating lighting system with a sun-like appearance.