The present invention discloses a natural light homogenization lighting device and method based on free-form surface and sawtooth grating, and the device can be used as lighting curtains, indoor shutters, window glasses and the like. The device includes a front surface and a rear surface in an array form, the first surface is a free-form surface array, the second surface is a sawtooth surface array, and the free-form surface array is used for collecting outdoor natural light, and transmitting to the sawtooth surface array through the intermediate medium made of the same material between the two surfaces; and the sawtooth surface array is used for deflecting the incident natural light to the indoor space after being refracted by an inclined surface. The present invention can efficiently collect the natural light incident into the window, disperse the light evenly to all directions indoors, homogenize the indoor lighting, and effectively protect the indoor privacy. The device is thin and easy to mass produce, environmentally friendly and pollution-free.

A natural lighting device is capable of controlling an angle of diffusion of sunlight reflected to a shaded area to form reflected light whose size and shape are suitable for a window of a household. The natural lighting device is installed in the vicinity of a building having a shaded area formed thereon to radiate sunlight toward a household located in the shaded area and includes a primary reflector configured to reflect sunlight incident thereon; and a secondary reflector configured to reflect the reflected light, which is reflected from the primary reflector, incident thereon, wherein the secondary reflector includes a secondary reflecting mirror having a curvature about an axis in a direction that intersects with the ground or an axis in a direction that is horizontal to the ground so that the reflected sunlight is not diffused in a horizontal direction or naturally diffused in a vertical direction.

Provided is a sunlight lighting system used in a greenhouse or a plant factory. The sunlight lighting system converts sunlight into light with a stable illumination direction and a controllable illumination intensity by means of a combination of a controller, a light condenser, a main driving mechanism and an illuminator, so that the sunlight lighting system meets lighting requirements of high-density stereoscopic cultivation frames. A supporting greenhouse is further comprised, where a facade or a top is provided with a light through hole. A main optical axis of the sunlight lighting system passes through the light through hole. A supporting lighting method is further comprised, which can obtain a better lighting effect with fewer steps.

A reflector array includes a support structure, a motor, a shaft operatively coupled to the motor, a free plate, and a drive plate. The free plate includes a free plate first side and a free plate second side axially opposed to the free plate first side. The free plate further may include a latching mechanism disposed on the free plate second side and a drive plate. The drive plate is rotatably coupled to the shaft. The drive plate includes a drive plate first side and a drive plate second side axially opposed to the drive plate first side. The drive plate further includes a drive plate finger coupled to the drive plate second side. The drive plate finger is configured to contact the latching mechanism in response to rotation of the driver plate. The drive plate finger is further configured to couple the drive plate to the free plate.

A reflector array includes a support structure, a motor, a shaft operatively coupled to the motor, a free plate, and a drive plate. The free plate includes a free plate first side and a free plate second side axially opposed to the free plate first side. The free plate further may include a latching mechanism disposed on the free plate second side and a drive plate. The drive plate is rotatably coupled to the shaft. The drive plate includes a drive plate first side and a drive plate second side axially opposed to the drive plate first side. The drive plate further includes a drive plate finger coupled to the drive plate second side. The drive plate finger is configured to contact the latching mechanism in response to rotation of the driver plate. The drive plate finger is further configured to couple the drive plate to the free plate.

A skylight for a building includes a solar panel arranged within the skylight, the solar panel comprising one or more photovoltaic cells to collect direct radiation from rays of sunlight for conversion to electrical power, and an optical element to receive the direct radiation and refract it to the solar panel, and to receive the direct radiation and diffuse radiation scattered from the rays of sunlight and refract the direct radiation and the diffuse radiation through the skylight, bypassing the solar panel, to provide daylighting in the building.

An optical device and systems using an optical device are provided, where the optical device may be configured for collimating incoming light rays. The optical device may include a host medium substantially comprised of a transparent material and an array of substantially transparent structures embedded within the host medium. The structures of the array each include a convex side presented to the incoming light rays and a concave side that passes light rays through toward the output face of the host medium, collimating the rays. Multiple stages of arrays may be provided in the optical device, typically with lengthening aspect ratios and increasing indexes of refraction in a direction from the input face toward the output face. The systems may use the optical device for using an exterior light to illuminate an interior space in a building or to generate power.

The present subject matter is an improved skylight employing four key elements to achieve its twin objectives of improved low sun-angle light collection and reduced high sun angle light and heat collection: (1) a transparent truncated pyramid-shaped dome, (2) two horizon-facing parabolic reflectors, (3) a collimating curb, and (4) a dual-pane diffuser assembly.

The Sun Sky/Electric Hybrid Lighting System (SEHLS) is the fully integrated sun lighting system that can be connected through out multiple rooms to bring natural sun stereophonic lighting into a home or office. SEHLS is a dual capable system that was designed for energy savings with both sun power and low energy lighting. The SEHLS system has four major lighting systems that fit any room's needs. Each unit has been designed with the same common usage and capability. In this Patent, the Sun Sky/Electric Reflective Lite System (SERLS) will be Patented as an example. The SERLS is a dual usage system that can be placed in medium-spaced room such as a bedroom, hallway or office to provide sun light luminance capability.

Disclosed is a sunlight transmitter, and more particularly to a sunlight transmitter according to an embodiment of the present invention is used as a transmission device of solar light to transmit sunlight into an indoor space by condensing and converting the sunlight into straight parallel light, and maximizes a sunlight transmission efficiency by minimizing loss in condensing the sunlight and obtaining not only the straight parallel light of high luminous flux but also diffused light through hybrid condensation.