The present disclosure generally relates to lighting modules, and more specifically, to a configurable linear lighting module for use within a suspended ceiling grid assembly. The configurable linear lighting module is easy to install and comprises a novel linear support element with internal and external support features which is provided with integrated or removable optical assemblies to deliver lighting distributions tailored to optimally illuminate the surface ceiling panels as well as floors, walls and work surfaces below. When installed within a configured ceiling grid assembly the configurable linear lighting module provides novel support features for ceiling panels to be held in-line, above, below or tilted relative to the existing ceiling grid plane. A wide range of useful lighting distributions are achieved by configuring the optical elements and LED light sources supported and aligned by the linear support element. By selectively applying electrical power to individual light source channels it is further possible to electrically control lighting distributions. As such the configurable linear lighting module provides both aesthetically pleasing features and useful lighting distributions. Furthermore, illustrated embodiments of ceiling grid assemblies comprising one or more of the configurable linear lighting modules demonstrate how both appearance and lighting distributions can be controlled to meet aesthetic and lighting design requirements.

An optical article for illuminating building interiors including a reflective grid panel, an LED light source positioned above the reflective grid panel and configured to illuminate the reflective grid panel at incidence angles ranging from a minimum angle of 0° to a maximum angle of at least 45°, a light diffusing sheet of an optically transmissive dielectric material approximately coextensive with and oriented generally parallel to the reflective grid panel, and a pair of reflective side walls flanking a space between the reflective grid panel and the light diffusing sheet. The reflective grid panel incorporates a plurality of parallel longitudinal walls and a plurality of parallel transverse walls joining the walls and defining a plurality of rectangular openings configured to transmit light. Each of the parallel transverse walls extends transversely with respect to a plane of the reflective panel and is configured to diffusely reflect a portion of the light being transmitted through the plurality of rectangular openings.

A dispersive optical element includes a substrate including a dielectric material, an optical coating arranged on the substrate, and a layer of material including a microscale feature arranged directly on the optical coating.

The vehicle panel includes: a panel main body comprising a three-dimensional pattern part including a three-dimensional pattern engraved on a back surface of the three-dimensional pattern part, and a coating part coated on an upper surface of the three-dimensional pattern part; and a lighting part provided such that the light is emitted from an inner surface of the panel main body, wherein the lighting part comprises: a diffusion plate provided to be spaced at a location corresponding to the panel main body, and a light source located inside the diffusion plate and provided to be spaced apart from the diffusion plate.

A laser scanner can include a housing, a window, and a light emitting system, which can output laser pulses of a first wavelength through the window. A light detection system can receive light of the laser pulses that is reflected by an object through the window and direct the received light to an optical sensor that generates electrical signals from the received light. A controller can make a determination regarding a presence or position of the object based on the electrical signals. The scanner can have one or more light sources for illuminating the window with light of a second wavelength. The window can have diffusing features configured to diffuse the output light of the second wavelength. The controller can operate the one or more light sources in response to the determination regarding the presence or position of the object to provide a visual indication of the determination.

A projection screen and a projection system are provided. The projection screen includes a microlens array layer, a filter layer, and an optical structure layer arranged sequentially from an incident side of a projection light. The microlens array layer includes microlens units. The filter layer has a predetermined transmittance and is provided with a light-transmissive hole. The optical structure layer includes an optical microstructure unit capable of reflecting the incident light. The light-transmissive hole in the filter layer is arranged on the basis of an optical axis of the microlens unit in the microlens array layer so that the light-transmissive hole is exactly located on a focal plane of the microlens unit, and the projection light is reflected by the microlens unit, and then exactly passes through the light-transmissive hole. The projection screen has a high screen gain.

An apparatus, system, and method is described for partially or completely eliminating Moiré interference artifacts generated in a heads up display having a diffuser with a micro lens array. Each lenslet of the micro lens array is faceted with micro facets positioned at least partially randomized. Aspects of the faceting may be selected to prevent Moiré interference artifacts but permit the diffuser to be used in a heads up display.

A linear profile support element and ceiling grid lighting module for suspended ceiling systems is provided. The linear profile support element is configured to connect onto a T-bar within a ceiling grid system and has at least two lateral supporting portions to hold an optical device and ceiling panel in position with one or both offset from the ceiling grid plane. In embodiments having the ceiling panel on an upper lateral support portion, a recessed volume is created in the ceiling grid system which functions as an optical cavity for light from an optical device mounted at the lower lateral supporting portion. With a ceiling panel mounted on the lower lateral supporting portion, the panel is dropped with respect to the ceiling grid plane and the optical device can be aligned at an upper lateral supporting portion horizontally, for example to project light onto a surrounding ceiling panel and provide indirect lighting from the ceiling. Ceiling panels mounted on the lateral supporting portions can be either standard ceiling grid panels or panels alternatively configured for specific appearance or reflectance properties. Various embodiments are described that provide a range of useful mounting options for both the optical system and ceiling panel, including configurations with tilted ceiling panels. Multiple linear supporting elements can be used to create an enhanced three-dimensional appearance to the suspended ceiling system as well as interesting features such as fully or partially illuminated panels, cavities, coves or edges. Ceiling grid lighting module embodiments integrate the linear profile support element with an optical device for pre-configured light distribution and form factor that can be easily installed in a ceiling grid system.

An optical article for illuminating building interiors including a reflective grid panel, an LED light source positioned above the reflective grid panel and configured to illuminate the reflective grid panel at incidence angles ranging from a minimum angle of 0° to a maximum angle of at least 45°, a light diffusing sheet of an optically transmissive dielectric material approximately coextensive with and oriented generally parallel to the reflective grid panel, and a pair of reflective side walls flanking a space between the reflective grid panel and the light diffusing sheet. The reflective grid panel incorporates a plurality of parallel longitudinal walls and a plurality of parallel transverse walls joining the walls and defining a plurality of rectangular openings configured to transmit light. Each of the parallel transverse walls extends transversely with respect to a plane of the reflective panel and is configured to diffusely reflect a portion of the light being transmitted through the plurality of rectangular openings.

To provide a translucent structure having a low haze factor and low sparkle. The translucent structure has an uneven structure at the surface thereof, wherein the uneven structure includes first convex portions 5a, of which the diameters at a height of the bearing height+0.05 μm of the surface shape (a), obtainable by measuring the uneven structure by a laser microscope, are at least 1 μm, and in an image (c) in which a plurality of convex portions are scattered, obtained by filtering the surface shape (a) by image processing software to obtain a smoothing image (b), and subtracting XYZ data of the smoothing image (b) from XYZ data of the surface shape (a), said plurality of convex portions include second convex portions 5b, of which the diameters at a height of 0.01 μm when the bearing height is deemed to be 0, are at least 0.4 μm, the density of the second convex portions is from 0.023 to 7.210 units/μm.sup.2, and the proportion of the total area in cross-section at a height of 0.01 μm of the second convex portions 5b is from 0.900 to 90.000%.