An illumination apparatus for providing light and for illuminating an illumination plane with a rectangular light distribution is provided. The illumination apparatus includes at least one light source configured to generate light, a collimation optical unit configured to collimate the light, a condenser optical unit configured to shape a rectangular angular distribution of the light coming from the collimation optical unit, and a freeform optical unit having at least one freeform area for modifying the angular distribution such that a rectangular light distribution is produced in an illumination plane that is optically connected downstream.

An illumination apparatus for providing light and for illuminating an illumination plane with a rectangular light distribution is provided. The illumination apparatus includes at least one light source configured to generate light, a collimation optical unit configured to collimate the light, a condenser optical unit configured to shape a rectangular angular distribution of the light coming from the collimation optical unit, and a freeform optical unit having at least one freeform area for modifying the angular distribution such that a rectangular light distribution is produced in an illumination plane that is optically connected downstream.

The light projection assemblies and opacity monitors described in this specification have an integrating sphere with an input aperture, an output aperture, and a spherical-shaped internal chamber. An LED source is located external to the chamber at the input aperture. A light baffle is located within the chamber at the output aperture. A condenser lens is located external to the chamber at the output aperture.

The light projection assemblies and opacity monitors described in this specification have an integrating sphere with an input aperture, an output aperture, and a spherical-shaped internal chamber. An LED source is located external to the chamber at the input aperture. A light baffle is located within the chamber at the output aperture. A condenser lens is located external to the chamber at the output aperture.

A portable light may comprise: a light housing including a first housing and a light head that is pivotable relative to the first housing; one or more light sources including an illumination light source in the light head; an electrical switch for selectively energizing the one or more light sources; and a detector of the pivoted position of the light head relative to the first housing for energizing and/or de-energizing one or more of the light sources. Other features of the light may include: a rear facing light source that may have one or more light sources, or an elongated clip, or a pivotable elongated clip, or one or more accessories mountable to a clip, or a combination thereof.

The present disclosure discloses a light distribution assembly and a lighting device, belonging to the technical field of lighting. The light distribution assembly includes a first lens, a second lens, a first kit, and a second kit; the first lens is disposed on the first kit, the second lens is disposed on the second kit, the second kit is connected to the first kit and is rotatable relative to the first kit to allow the second lens to be rotatable relative to the first lens, and at least one of the first lens and the second lens is a polarizing lens to change a light distribution path of the light distribution assembly.

An illumination module can comprise a circuit board, a semiconductor-based light source mounted to the circuit board, an encasing mounted to the circuit board, and one or more optical surfaces at least partially contained within the encasing. The semiconductor-based light source can emit light in a first illumination pattern. The one or more optical surfaces can be collectively configured to receive the light from the edge-emitting semiconductor-based light source. The one or more optical surfaces can further be collectively configured to condition and redirect the light, and to output the conditioned and redirected light from the illumination module in a second illumination pattern different from the first illumination pattern.

A downlight fixture is disclosed, and includes a lens defining at least one lens opening, a reflector, and a housing. The reflector defines at least one first retaining feature and at least one second retaining feature. The at least one lens opening is shaped to receive a corresponding first reflector retaining feature to interlock the lens and the reflector with one another. The housing defines at least one housing opening shaped to receive a corresponding second retaining feature to interlock the housing and the reflector with one another. The lens, the reflector, and the housing are each constructed of plastic.

A downlight fixture is disclosed, and includes a lens defining at least one lens opening, a reflector, and a housing. The reflector defines at least one first retaining feature and at least one second retaining feature. The at least one lens opening is shaped to receive a corresponding first reflector retaining feature to interlock the lens and the reflector with one another. The housing defines at least one housing opening shaped to receive a corresponding second retaining feature to interlock the housing and the reflector with one another. The lens, the reflector, and the housing are each constructed of plastic.

In some embodiments, optical systems with a reflector and a lens proximate a light output opening of the reflector provide light output with high spatial uniformity and high efficiency. The reflectors are shaped to provide substantially angularly uniform light output and the lens is configured to transform this angularly uniform light output into spatially uniform light output. The light output may be directed into a light modulator, which modulates the light to project an image.