Diffractive concentrator structures can provide a large emittance angle and a large beamforming aperture for radiation emitted by a small transmit aperture and then delivered to a larger exit aperture.

The present disclosure describes luminescent solar concentrators that include photoluminescent nanoparticles. The photoluminescent nanoparticles include a semiconductor nanocrystal that sensitizes the luminescence of a defect. The defect can include, for example, an atom, a cluster of atoms, or a lattice vacancy. The defect can be incorporated into the semiconductor nanocrystal, adsorbed onto, or otherwise associated with the surface of the semiconductor nanocrystal.

An indirect daylighting device for a building with an interior space may include a suspension system configured for securing to a building structure and a pan secured to the suspension system and having an incident surface and a cross-sectional profile forming a plurality of waves, wherein the incident surface is arranged to receive natural light entering a building and reflect the natural light to provide indirect lighting to the interior space of the building.

Described herein are solar reflectors which provide a low cost reflector construction that has a unique set of attributes: high solar reflectance, abrasion resistance, UV stability, mechanical integrity, and flexibility. The abrasion resistance is enabled through incorporation of an abrasion-resistant coating into a polymer film metal mirror construction. Methods of using the solar reflectors in solar concentrating applications are also provided.

According to one embodiment, an illumination device includes a light source module, and a reflector opposed to the light source module. The reflector includes a plurality of incidence openings on which light from the light source module is made incident, a plurality of emission openings opposed to the incidence openings, a plurality of reflective surfaces extending from the incidence openings to the emission openings, respectively, and reflective films formed on the reflective surfaces. The reflector includes a plurality of blocks, and the blocks are bonded to each other to form the reflector.

Systems and methods are described herein that may be used to form a heliostat. Various reflective surfaces and support structures are described that permit lightweight construction of configurable heliostats.

An ultraviolet curing module includes a first light source and a second light source. The first light source is configured to emit ultraviolet with a first spectrum. The first spectrum has a first peak wavelength. The second light source is configured to emit ultraviolet with a second spectrum. The second spectrum has a second peak wavelength. Wherein, a difference between the first peak wavelength and the second peak wavelength is greater than 35 nm, and an irradiation range of ultraviolet of the first light source on an irradiated object at least partially overlaps an irradiation range of ultraviolet of the second light source on the irradiated object.

Disclosed herein is a micro LED projector comprising: a micro LED panel and a collimator unit. The micro LED structure in the micro LED panel comprises a mesa structure and a micro lens formed above the micro mesa structure, a p type semiconductor layer, an n type semiconductor layer and a light emitting layer formed between the p type semiconductor layer and the n type semiconductor layer. The center of the micro lens is at a straight line which connects the center of the light emitting layer with the center of the collimator unit. The present disclosure decreases the volume and the weight of the micro LED projector.

There is set forth herein a device comprising structure defining a detector surface configured for supporting biological or chemical substances, and a sensor array comprising light sensors and circuitry to transmit data signals using photons detected by the light sensors. The device can include one or more features for reducing fluorescence range noise in a detection band of the sensor array.

In one aspect, an optical lens assembly (herein referred to also as an optic) is provided that comprises a plurality of lenses (or lens segments) adapted to receive light from a light source, each of said lenses (or lens segments) having an input surface and an output surface and a lateral surface extending between the input and output surfaces. The lenses are arranged relative to one another and positioned relative to the light source such that each of the lenses receives at its input surface a different portion of light emitted by the source, e.g., each lens receives at its input surface light emitted by the source into an angular subtense (solid angle) different than an angular subtense associated with another lens. Each lens (or lens segment) guides at least a portion of the received light to its output surface via reflection, e.g., via total internal reflection (TIR).