An optical device including a conductive chamber, a first optical module, a second optical module, and a third optical module is provided. The conductive chamber has a light-entrance end. The first optical module, the second optical module, and the third optical module are fixed in the conductive chamber, where the first optical module is adjacent to the light-entrance end and located between the light-entrance end and the second optical module, and the second optical module is located between the first optical module and the third optical module. The conductive chamber, the first optical module, and the second optical module together define a first resonant space. The conductive chamber, the second optical module, and the third optical module together define a second resonant space. An illumination device is also provided.

The invention discloses a reflector bowl and an optical system applicable for colorful spotlights. The reflector bowl comprises a reflector bowl body having a big end and a small end, wherein the small end of the reflector bowl body is arranged with a light source opening and the big end of the reflector bowl body is opened and serves as a light outlet, the reflector bowl body has a square shaped cross section, and an inner surface of the reflector bowl body is a smooth mirror surface. The reflector bowl body is configured to have a square shaped cross section and thus the light outlet has a square shape, and lights are reflected by the reflector bowl body and the reflected lights can be superimposed with direct lights of the light source, whereby the reflector bowl of the invention realizes uniform color mixture on the smooth surface.

A lighting fixture and method of providing lighting is provided herein that utilizes both direct and indirect light sources. The direct and indirect light sources can be provided in arrays of light emitting diodes (LEDs) oriented along desired axes. In some versions, the light fixtures described herein include a direct lighting array having one or more LEDs oriented to project light downwardly and an indirect lighting array having a plurality of LEDs oriented to project light in a transverse direction. Further, the light fixtures can include an indirect lighting member configured to be illuminated by the plurality of LEDs of the indirect lighting array. Additionally, or alternatively, the light fixtures described herein can include one or more controllers that are configured to independently operate the direct and indirect lighting arrays. Moreover, the indirect lighting array can be configured to emit light in a plurality of colors to visually convey information.

An optical device for a light fixture can include a quasi-semi-cylindrical outer perimeter that includes a substantially planar bottom surface, a top surface located adjacent to the bottom surface, where the top surface has a curvature, and a pair of side surfaces located adjacent to the bottom surface and the top surface, where the pair of side surfaces are located opposite each other. The optical device can also include a body bounded by the outer perimeter. The optical device can further include an inner optical feature disposed in the body at the bottom surface, where the inner optical feature forms a cavity bounded by multiple segments, wherein each two adjacent segments form an angle relative to each other. The cavity can be configured to receive a light source of the light fixture.

The invention discloses a reflector bowl and an optical system applicable for colorful spotlights. The reflector bowl comprises a reflector bowl body having a big end and a small end, wherein the small end of the reflector bowl body is arranged with a light source opening and the big end of the reflector bowl body is opened and serves as a light outlet, the reflector bowl body has a square shaped cross section, and an inner surface of the reflector bowl body is a smooth mirror surface. The reflector bowl body is configured to have a square shaped cross section and thus the light outlet has a square shape, and lights are reflected by the reflector bowl body and the reflected lights can be superimposed with direct lights of the light source, whereby the reflector bowl of the invention realizes uniform color mixture on the smooth surface.

A flagpole lighting device includes a mounting stem, a dome assembly including an illumination dome and at least one light source; a mounting structure with a central portion and mounting arms; and mounting receptacles each including a receptacle fastener, a receptacle body, and body flanges; such that the flagpole lighting device is configured to be connected to a flagpole truck that is mounted on a top of a flagpole, such that the flagpole lighting device provides lighting for a flag mounted on the flagpole.

A light source unit provides enhanced control of a colour shift of white light reflected by a retro-reflector. The light source unit includes a pump light source, which emits laser pump light, a phosphor, which converts the laser pump light into white light, a retro-reflector, which has an output aperture that allows emission of part of the white light, the retro-reflector reflecting another part of the white light back to the phosphor, and scattering particles, which are adjusted to increase a blue light ratio of the white light.

An optical device including a conductive chamber, a first optical module, a second optical module, and a third optical module is provided. The conductive chamber has a light-entrance end. The first optical module, the second optical module, and the third optical module are fixed in the conductive chamber, where the first optical module is adjacent to the light-entrance end and located between the light-entrance end and the second optical module, and the second optical module is located between the first optical module and the third optical module. The conductive chamber, the first optical module, and the second optical module together define a first resonant space. The conductive chamber, the second optical module, and the third optical module together define a second resonant space. An illumination device is also provided.

A lighting arrangement includes a light source configured for emitting light; a first reflector configured for collimating a first portion of the light emitted by the light source around a main light emission direction (D); and a second reflector arranged opposite to the light source. The second reflector is configured for reflecting a second portion of the light emitted by the light source back towards the light source for being diffusely reflected from the light source.

[Object] To control a colour shift of white light reflected by a retro-reflector.

[Solution] A light source unit (1) includes a pump light source (2), which emits laser pump light (11), a phosphor (3), which converts the laser pump light (11) into white light (12), a retro-reflector (4), which has an output aperture (5) that allows emission of part of the white light (12), the retro-reflector (4) reflecting another part of the white light (12) back to the phosphor (3), and scattering particles (7), which are adjusted to increase a blue light ratio of the white light (12).