Provided is a lamp for a vehicle capable of achieving uniform brightness while improving sharpness of a light irradiation pattern. The vehicle lamp includes a light source system; and an optical system configured to allow light emitted from the light source system to be incident to the optical system through a plurality of incident lenses and to exit through a plurality of exit lenses corresponding to the plurality of incident lenses. The plurality of exit lenses include a first exit lens configured to output light therefrom in a first direction, and a second exit lens configured to output light therefrom in a second direction that is tilted by a predetermined angle with respect to the first direction.

An optical device includes an array of light-emitting elements, including a first subset of light-emitting elements and a second subset of light-emitting elements. The first subset of light-emitting elements is configured to emit light having wavelength L.sub.1. The device includes a high refractive index material selectively disposed on the second subset of light-emitting elements and an array of optical elements positioned so as to be illuminated by the first subset of light-emitting elements and by the second subset of light-emitting elements. The optical elements are regularly arranged in a common plane at a pitch P, the common plane is located a distance D from the array of light-emitting elements, and P.sup.2≈2L.sub.1D/N, N being an integer greater than or equal to 1.

A digitally controlled LED illuminator sheet that produces far-field illumination patterns or light field distributions that increase light utilization and application efficiency. A dynamic directional LEDs (or other kinds of solid-state light sources) sheet is positioned under each lenslet of a microlens array. Individual LED beam pointing direction depends on off-axis position relative to optical axis of lenslet. Individual beams from independent LEDs form illumination pixels at the illumination plane or within a volume space and can be modulated in intensity. Illumination pixels partially overlap in far-field illumination plane and illumination volume. Over a large illumination space many illumination pixels will partially superimposed on neighboring illumination pixels, with the overlap being in increments smaller than the size of a pixel. The LEDs can be digitally turned on or off and/or pulse width or amplitude modulated to produce far-field illumination patterns or light field distributions with spectral efficiency and efficacious intensity.

Disclosed is a lamp for a vehicle, the lamp including: a light source configured to emit light; and a multi facet lens (MFL) which is provided in front of the light source, and includes a plurality of facets and stepped portions formed in boundary regions between the plurality of facets. At least some of exit surfaces of the plurality of facets have a shape of a portion of an aspherical lens or an anamorphic lens.

A light source system and a light-emitting device are provided. The light source system includes an array of light-emitting diodes, the light-emitting diodes including light-emitting diode chips; a collimating lens group located on a light path of light emitted by the array of the light-emitting diodes, the collimating lens group being configured to collimate light beams emitted by the light-emitting diode chips; and a fly-eye lens arranged on a light path of light outputted from the collimating lens group. The fly-eye lens includes micro lens units corresponding to the light-emitting diode chips, and for at least one light-emitting diode chip of the light-emitting diode chips, an image formed by each of at least one light-emitting diode chip on surfaces of the micro lens units is completely within a surface of one of the micro lens units. A ratio of side lobes is reduced, thereby improving the energy utilization rate.

The illumination module for emitting light (5) can operate in at least two different modes, wherein in each of the modes, the emitted light (5) has a different light distribution. The module has a mode selector (10) for selecting the mode in which the module operates, and it has an optical arrangement. The arrangement includes—a microlens array (LL1) with a multitude of transmissive or reflective microlenses (2) which are regularly arranged at a lens pitch P (P1);—an illuminating unit for illuminating the microlens array (LL1). The illuminating unit includes a first array of light sources (S1) operable to emit light of a first wavelength L1 each and having an aperture each. The apertures are located in a common emission plane which is located at a distance D (D1) from the microlens array (LL1). In a first one of the modes, for the lens pitch P, the distance D and the wavelength L1 applies P2=2.Math.L1.Math.D/N wherein N is an integer with N≥1.

The present disclosure discloses a light bulb and a crystal lamp. The light bulb includes a light emitting module and a light-transmitting cover; the light emitting module includes a mounting column and a plurality of LED lamp beads, the mounting column includes a circumferential surface and a top surface, and the plurality of LED lamp beads are arranged at least on the circumferential surface; the light-transmitting cover is arranged to cover a periphery of the light emitting module and distributes light for the plurality of LED lamp beads, the light-transmitting cover includes a plurality of micro-lens units, and each of the plurality of micro-lens units has a light incident surface and a light exit surface, and is in a configuration of converging light from the light incident surface to the light exit surface.

There is provided a method to manufacture a diffuser plate with better productivity and exhibiting an excellent diffusion property and having excellent durability with respect to light having large coherence, the microlens array diffuser plate including: a microlens group positioned on a surface of a transparent substrate. The diffuser plate includes two or more unit cells that are continuously set in array, the unit cell includes a plurality of microlenses positioned on the surface of the transparent substrate, and ridge lines between the microlenses adjacent to each other are nonparallel to each other, and are nonparallel to the transparent substrate.

The present disclosure discloses a lighting arrangement with optical composite that provides, when in operation, more uniform angular light distribution emissions into an environment. Lighting arrangements employing the novel optical composite in conjunction with LED light sources provide direct and indirect illumination with more uniform angular light distribution emissions into application environments. An optically coupled opaque layer suppresses internal reflections of ambient light to improve visual appearance of the optical composite by reducing peak brightness and brightness non-uniformity. In specific embodiments, low visibility matte appearances are achieved that are aesthetically desirable in the “off” (unlit) state. The present disclosure provides a solution to problems of non-uniform angular distribution of light causing visual discomfort and spatial discontinuity in output. Energy savings are achieved with high optical efficiency utilizing compact, durable, robust, and aesthetically appealing optical composites and lighting arrangements capable of providing an assortment of configurable angular light distributions.

Disclosed are lighting arrangements that provide, when in operation, more uniform angular light distribution emissions into an environment. The lighting arrangements use LED light sources, a light scattering optical element and partial reflectance from a light transmissive sheet or reflective layer to produce direct and indirect illumination with improved angular light distribution and uniformity onto targeted illumination surfaces such as ceilings, walls, and floors. The present disclosure provides a solution to problems of non-uniform angular distribution of light causing visual discomfort and spatial discontinuity in output. Energy savings are achieved with high optical efficiency utilizing compact, durable, robust, and aesthetically appealing optical composites and lighting arrangements capable of providing an assortment of configurable angular light distributions.