A high efficiency daylight directing structure for application on fenestration deploys closely spaced macroscopic bars of transparent resin to eliminate different forms of glare. The spaced apart surfaces provide for efficient reflection of selective incident light, by TIR or metallic surfaces, via the ultra-smooth native surfaces from a mold or casting process. A close spacing is readily obtained in various attachment methods to boost efficiency. The fabrication method allows selective deposition of absorbing layers, such as by of painting/printing between alternating native optical surface to provide one way transparency at high angles of incidence. The bars are supported on at least one common planar surface by transparent support member with an optical quality adhesive material filling any imperfection in the bars common planar surface that form in fabrication.

A daylighting apparatus of the present invention includes: a daylighting sheet (13) that has first and second surfaces opposite to each other and that lets light in through the first surface and lets the light out through the second surface at a predetermined distribution of angles; and a visible light-reflecting sheet (15) that reflects part of visible light falling on the first surface of the daylighting sheet (13).

Devices that incorporate phase change materials in containment vessels promote conduction of thermal energy between the phase change materials within the containment vessels and the surrounding air. In some embodiments, the containment vessels are transparent to enable visual awareness of the operation and functionality of the PCMs. In some embodiments, the containment vessels are design to passively promote air flow across the surfaces of the containment vessels. In some embodiments, the containment vessels include embedded structures to promote the conduction of thermal energy to and from the interior of the containment vessel. In some of these embodiments, the intent is to target the location of crystal ‘seeds’ and control crystal growth, thus gaining greater control over thermal transfer.

The present disclosure describes various embodiments of a structure for a composite light regulating film, methods of using the composite light regulating film, and for methods of making a composite light regulating film.

An active glazing system (100) includes a double glazing, with two transparent plates (1a, 1b) that together delimit an intermediate volume (2) filled with gas. The system further includes a control device (10) that is capable of producing a transition in a volatile compound present in the intermediate volume, between a dry vapor state and a supersaturated vapor state of the volatile compound. Switching processes can therefore be controlled for the double glazing, between a transparent optical state and a diffusing optical state. Such a system can be used as building or vehicle glazing, an interior partition arrangement, a projection screen, a solar diffuser, a light source diffuser, a vision blurring device, etc.

According to one embodiment, a photovoltaic system contains a photovoltaic element comprising a photoelectromotive force part, a first transmitting member, and a second transmitting member, the photoelectromotive force part having a light transmitting property and generating an electromotive force by light irradiation, the first transmitting member and the second transmitting member being arranged at both sides of the photoelectromotive force part in a thickness direction, light transmittances of the first transmitting member and the second transmitting member being electrically changed; a control part configured to maximize a power generation amount of the photovoltaic element by changing the respective light transmittances of the first transmitting member and the second transmitting member while a light transmittance of a whole photovoltaic element is kept constant.

Generally plano rectangular louvers are capable of being ganged in a stacked tiltable array to enhance light re-direction when titled to follow the solar elevation. Combinations of features and optical characteristic avoid optical artifacts and enhance efficiency of light utilization and manufacturing. Different louvers can be combined in alternative ways in such arrays.

The present disclosure relates generally to light management constructions comprising microstructured prismatic elements useful in the preparation of sun-facing light redirecting films having reduced glare.

The present disclosure relates generally to light management constructions comprising microstructured prismatic elements useful in the preparation of room-facing light redirecting films having reduced glare.

A sunlight redirector has a first mirror array formed of a first plurality of substantially parallel, uniformly spaced, longitudinal outward mirror segments; and a second mirror array formed of a second plurality of substantially parallel, uniformly spaced, longitudinal inward mirror segments. Each mirror segment has a normal vector. The outward mirror segments are adjustably positionable, such that their normal vectors remain parallel. The first mirror array is rotatable about a normal vector of the sunlight redirector. The inward mirror segments may remain fixed in position at all times; or they may be moved, twice per day, between first and second fixed positions.