A surface light source module includes a substrate, a plurality of light-emitting elements mounted on the substrate, a first optical layer disposed on the light-emitting elements to cover the light-emitting elements and configured to disperse light emitted from the light-emitting elements, and a second optical layer disposed on the first optical layer and configured to absorb the light emitted from the light-emitting elements and emit light of a different wavelength band from a wavelength of the absorbed light, wherein a distance from an upper surface of the first optical layer to an upper surface of the second optical layer has a value less than a distance from an upper surface of the substrate to the upper surface of the first optical layer.

A surface light source module includes a substrate, a plurality of light-emitting elements mounted on the substrate, a first optical layer disposed on the light-emitting elements to cover the light-emitting elements and configured to disperse light emitted from the light-emitting elements, and a second optical layer disposed on the first optical layer and configured to absorb the light emitted from the light-emitting elements and emit light of a different wavelength band from a wavelength of the absorbed light, wherein a distance from an upper surface of the first optical layer to an upper surface of the second optical layer has a value less than a distance from an upper surface of the substrate to the upper surface of the first optical layer.

The present disclosure relates to a light and disinfection system, comprising: a lighting system which includes an illumination source and a diffusion hood suitable for the illumination source; a disinfection system which includes a disinfection light source and a cover adapted to transmit the disinfection light source, wherein the diffusion hood and the cover are respectively used for the illumination source and the disinfection light source.

A planar light source device includes a light diffusing portion and a light reflecting portion in this order. The light diffusing portion has light transmissivity and light diffusivity. Reflectance of the light reflecting portion with respect to light of a particular wavelength entering at an angle of incidence of 0° is 80% or higher. The reflectance of the light reflecting portion with respect to at least part of light of the particular wavelength entering at an angle of incidence of which an absolute value is greater than 45° is less than 50%.

A light emitting device includes: a base; a light emitting element; a light reflective film located on an upper surface of the light emitting element; and a encapsulant. A ratio of a maximum width (W.sub.max) of the encapsulant with respect to a maximum width of the light emitting element, in a side view, is 2 or more. An outer shape of a part of the encapsulant located within a range of elevation angles that is in a range of 10° to 50° from a center of a mounting region at an upper surface of the base on which the light emitting element is mounted is formed to have a curved surface. A ratio (r/W.sub.max) of a radius of curvature (r) of the curved surface with respect to the maximum width (W.sub.max) of the encapsulant, in a side view, is in a range of 0.25 to 0.50.

A wall wash recessed light fixture has a light engine assembly has an aperture, an LED module operable to emit light through the aperture, a lens disposed between the LED module and the aperture, and a reflector disposed between the LED module and the lens. The LED module has an optical axis passing through the aperture and substantially parallel to a longitudinal axis (Z). The lens has a first side forming a plano-convex lens with a convex surface facing the LED module and has a second side with a Fresnel lens surface facing the aperture, and the lens is aligned at an oblique angle Θ.sub.1 relative to the optical axis of the LED module. A diffuser is disposed between the lens and the aperture. The plano-convex lens has a principal axis aligned at the oblique angle Θ.sub.1 relative to the optical axis of the LED module.

A wall wash recessed light fixture has a light engine assembly has an aperture, an LED module operable to emit light through the aperture, a lens disposed between the LED module and the aperture, and a reflector disposed between the LED module and the lens. The LED module has an optical axis passing through the aperture and substantially parallel to a longitudinal axis (Z). The lens has a first side forming a plano-convex lens with a convex surface facing the LED module and has a second side with a Fresnel lens surface facing the aperture, and the lens is aligned at an oblique angle Θ.sub.1 relative to the optical axis of the LED module. A diffuser is disposed between the lens and the aperture. The plano-convex lens has a principal axis aligned at the oblique angle Θ.sub.1 relative to the optical axis of the LED module.

An optical film including a first film substrate, and a light diffusion layer that is formed on the first film substrate, wherein the light diffusion layer contains a binder resin and light-diffusing particles, of the light-diffusing particles, 10% or more by number of the light-diffusing particles form an uneven structure on a surface of the light-diffusing layer by the 10% or more of the light-diffusing particles protruding more than a surrounding area not containing any light-diffusing particles, and of the light diffusing particles which cause the binder resin to be protruded and have a protruded portion, 90% or more by number of the protruded portion of light-diffusing particles is covered by the binder resin.

A luminaire, including a shade, a mounting base, a first end cap, a second end cap, a light source module and a drive power source. The shade has two first folded edges opposite to each other, and the mounting base has two second folded edges opposite to each other; the first folded edges are in snap-fit with the second folded edges; the luminaire further includes a shade pushing assembly, and the shade pushing assembly includes a force-exerting key and a pushing piece; one end of the force-exerting key is connected to the pushing piece, and the other end of the force-exerting key extends out of the mounting base; the pushing piece abuts against a first end face of at least one of the first folded edges.

An illumination source, comprising: (a) at least one coherent light emitting device (CLED) configured for emitting coherent light having an optical path; (b) at least one optical element in said optical path for converting at least a portion of said coherent light to incoherent light, said optical element being configured to emit said incoherent light in a direction; and (c) a light control mechanism (LCM) for altering said direction of said incoherent light.