An optical unit includes a light source having both a first light emitting element for emitting light having a first color and a second light emitting element for emitting light having a second color that is different from the first color; and a rotating reflector configured to be rotated in one direction around a rotational shaft, while reflecting the light having the first color and the light having the second color, which have been emitted from the light source. In the rotating reflector, a reflecting surface is provided such that a predetermined light distribution pattern is formed with the light having the first color and the light having the second color, which have been reflected by the rotation of the rotating reflector, being superimposed one on another.

A light source unit includes one or more light source rows that include a first light source row including light emitting devices. The light emitting devices of the first light source rows are arranged at non-uniform intervals. An illuminator includes a light source unit for emitting a bundle of light beams, a first fly-eye lens including lenslets, a second fly-eye lens, and a condenser lens. The light source unit includes one or more light source rows each including light emitting devices. The principal rays of first light beams outputted from a first light source row out of the one or more light source rows enter different lenslets out of the lenslets. A positional relationship between a principal ray of each of the first light beams and the optical axis of the lenslet which the principal ray enters is aperiodic over the first light source row.

A light source unit includes one or more light source rows that include a first light source row including light emitting devices. The light emitting devices of the first light source rows are arranged at non-uniform intervals. An illuminator includes a light source unit for emitting a bundle of light beams, a first fly-eye lens including lenslets, a second fly-eye lens, and a condenser lens. The light source unit includes one or more light source rows each including light emitting devices. The principal rays of first light beams outputted from a first light source row out of the one or more light source rows enter different lenslets out of the lenslets. A positional relationship between a principal ray of each of the first light beams and the optical axis of the lenslet which the principal ray enters is aperiodic over the first light source row.

An optical system for a stage lamp wherein the optical system comprises: a light source, a light condensing device, an effect component, a lens, a multi-reflector optical component fixed on an upper portion of the lens, a light emitted by the light source being reflected by the light condensing device and converged to form a main light beam along a transmission direction of the light, the main light beam sequentially passing through the effect component and the lens and being reflected by the multi-reflector optical component; wherein the multi-reflector optical component is provided with at least three reflective mirrors, and is connected to a at least three-stage linkage mechanism which is capable of driving the multi-reflector optical component, and achieving a three-dimensional dynamic light spot effect. When the optical system according to the present invention is applied to the stage lamp, one lamp simultaneously presenting a plurality of same dynamic spot effects is implemented.

An optical system for a stage lamp wherein the optical system comprises: a light source, a light condensing device, an effect component, a lens, a multi-reflector optical component fixed on an upper portion of the lens, a light emitted by the light source being reflected by the light condensing device and converged to form a main light beam along a transmission direction of the light, the main light beam sequentially passing through the effect component and the lens and being reflected by the multi-reflector optical component; wherein the multi-reflector optical component is provided with at least three reflective mirrors, and is connected to a at least three-stage linkage mechanism which is capable of driving the multi-reflector optical component, and achieving a three-dimensional dynamic light spot effect. When the optical system according to the present invention is applied to the stage lamp, one lamp simultaneously presenting a plurality of same dynamic spot effects is implemented.

A lighting device, comprising a housing, a light emitting diode, an optical system configured to at least partially collimate light emissions in a forward direction; and a removable accessory that reflects a portion of the light emissions more than 90 degrees from the forward direction. Also, a lighting device comprising a housing and a plurality of light emitters arranged in a row, and a light distribution-modifying element comprising a body portion and a plurality of light distribution-modifying protrusions (each comprising a reflection surface) arranged in a row substantially parallel to the row of light emitters. at least some of the light emitters aligned with at least some of the plurality of light distribution-modifying protrusions as respective pairs. Also, a light distribution-modifying element, and a lighting device comprising a housing, at least one light emitter, and a light distribution-modifying element comprising a body portion and a light distribution-modifying protrusion. Also, methods.

A lighting device, comprising a housing, a light emitting diode, an optical system configured to at least partially collimate light emissions in a forward direction; and a removable accessory that reflects a portion of the light emissions more than 90 degrees from the forward direction. Also, a lighting device comprising a housing and a plurality of light emitters arranged in a row, and a light distribution-modifying element comprising a body portion and a plurality of light distribution-modifying protrusions (each comprising a reflection surface) arranged in a row substantially parallel to the row of light emitters. at least some of the light emitters aligned with at least some of the plurality of light distribution-modifying protrusions as respective pairs. Also, a light distribution-modifying element, and a lighting device comprising a housing, at least one light emitter, and a light distribution-modifying element comprising a body portion and a light distribution-modifying protrusion. Also, methods.

A system providing effective, broad spectrum UV-C or other ionizing radiation clinical surface disinfection, high intensity UV-C light emitting diodes (LEDs) of incrementally differing wavelengths are sequentially embedded in densely packed reflective nacels (cups or pockets) forming the surface of a rotating spherical or hemispherical structure. A combination of UV-C emitter component location and activation with the rotational and reciprocal elevation functions of such structures produces complete and continuous environmental overlapping UV-C energy scattering.

A system providing effective, broad spectrum UV-C or other ionizing radiation clinical surface disinfection, high intensity UV-C light emitting diodes (LEDs) of incrementally differing wavelengths are sequentially embedded in densely packed reflective nacels (cups or pockets) forming the surface of a rotating spherical or hemispherical structure. A combination of UV-C emitter component location and activation with the rotational and reciprocal elevation functions of such structures produces complete and continuous environmental overlapping UV-C energy scattering.

A light source apparatus includes: an excitation light source including a laser light source; a first wheel that is controlled to rotate, and includes, in a part of a surface thereof to be illuminated by excitation light emitted from the excitation light source, a phosphor layer to be excited by the excitation light; and a second wheel that is controlled to rotate, and includes a dichroic filter that outputs light having a desired wavelength component of each of fluorescence emitted from the phosphor layer of the first wheel and the excitation light emitted from the excitation light source.