Abstract: A luminaire includes a lamp barrel having a light source detachably connected with a lens assembly. The lens assembly includes a lens barrel detachably connected with the lamp barrel and a focusing member on the lens barrel. An adjusting assembly includes a rotatable focusing ring, a lens fixing ring and a lens. The focusing ring includes a spiral groove on an inner surface. The lens fixing ring includes a projected rail on an outer surface. The lens barrel includes a bar shaped through hole extending along an axial direction. The projected rail passes through the bar shaped through hole and is mated with the spiral groove by clearance fit. Rotation of the focusing ring acts on the projected rail through the spiral groove and drives the lens fixing ring and the lens forward and backward in the lens barrel to adjust a distance between the lens and the light source.

Abstract: A lamp for vehicle includes a light source unit that generates light, and an optical unit disposed in front of the light source unit. The optical unit includes an incident surface on which the light is incident from the light source unit and an emitting surface through which the light is transmitted to form a predetermined beam pattern. The incident surface of the optical unit includes a plurality of divided regions that are divided in a grid shape, and the plurality of divided regions include at least a first divided region and a second divided region having different distances from a center line that connects centers of the incident surface and the emitting surface of the optical unit. In particular, the first divided region and the second divided region are formed to have different inclination angles with respect to a vertical plane in at least one direction.

Abstract: The present disclosure discloses a new dual-drum projection lamp provided with a housing. A first projection mechanism and a second projection mechanism located on one side of the first projection mechanism are arranged in the housing. A transmission mechanism is further arranged in the housing. The transmission mechanism is configured to link the first projection mechanism and the second projection mechanism to enable the first projection mechanism and the second projection mechanism to rotate simultaneously, or the transmission mechanism is configured to respectively drive the first projection mechanism or the second projection mechanism to rotate. The present disclosure has the beneficial effects that by adopting a new transmission mode, a transmission structure is simpler. In addition, the new transmission mode can be implemented only by a single motor, so that the production cost is reduced, and the fault rate is also reduced.

Abstract: Disclosed are a projection device for generating a meteor lighting effect and a projection lamp for generating a meteor lighting effect, wherein the projection device for generating the meteor lighting effect comprises: a first incoherent light source, wherein the first incoherent light source has an irradiation surface; a first optical path plate, wherein the first optical path plate partially covers the irradiation surface of the first incoherent light source; a second optical path plate, wherein the second optical path plate is arranged on one side that is of the first optical path plate and that is far away from the first incoherent light source; and a driving assembly, wherein the driving assembly is in driving connection with the first optical path plate to drive the first optical path plate to rotate.

Abstract: A lens array included in a display switching device according to one or more embodiments may include a portion having a greater average of curvature radii of microlenses at a greater distance from a predetermined lens reference position on a surface of the lens array including the microlenses.

Abstract: Lighting device for a motor vehicle with a first plurality of selectively activatable light sources and a second plurality of light sources. The first and second pluralities of light sources being arranged on a common substrate and each light source of the first plurality being positioned at a distance from the other light sources of the first plurality of less than 1 mm. The lighting device includes an optical element having a first region positioned facing the first plurality of light sources and a second region positioned facing the second plurality of light sources, with the second region being provided with optical patterns.

Abstract: Techniques for adjusting a color mixing system depending on beam clipping include receiving target information indicative of a target color of light emitted from the light fixture; receiving a beam clipping system setting for a beam clipping system, wherein the beam clipping system is configured to clip a portion of a beam of light; determining a target color mixing system setting based on the target information and the beam clipping system setting; and controlling a color mixing system according to the target color mixing system setting so as to cause the light fixture to emit light having the target color.

Abstract: An optical projection device for projecting a linear image is disclosed. Light emitted by an array of light emitting diodes arranged along an array axis is focused in at least a direction perpendicular to the array axis and diffused in a direction parallel to the array axis, thereby generating a linear image in which light from adjacent light emitting diodes is spatially overlapped. In some embodiments, the focusing and diffusion of the light is performed by a Fresnel lens and a lenticular lens, respectively. The optical projection device may be employed to virtually mark a surface, such as a floor in an industrial setting. High power light emitting diodes may be employed to generate a linear image having an illuminance of at least 4000 lux that is focused to a distance between 7.5 and 20 feet.

Abstract: Described is a telecentric illuminator that can be used, for example, in a mask aligner system for semiconductor wafer processing or as part of a solar simulator system for characterization of solar cells. The telecentric illuminator includes a tapered optic, a lens group having a plurality of lenses and an aperture stop, and a hybrid Fresnel lens. The Fresnel lens is disposed at a position along the optical axis of the telecentric illuminator to generate a telecentric image of the aperture stop at an illumination plane. The Fresnel lens may have a curved central portion and the aperture stop may be apodized to achieve desired illumination characteristics and improve the resolution of a mask aligner system.

Abstract: A lighting system includes a light source, a light redirection element, and a movement mechanism coupled to the light source and the light redirection element. The movement mechanism is configured to simultaneously or stepwise move the light source and the light redirection element between a top lighting position and an interlighting position.

Abstract: A filtering assembly for enhancing lighting from a luminaire serves as a lighting filter that includes one or more stackable and interchangeable filter devices. The filter devices are configured to detachably couple to a luminaire, and custom block a portion of the light transmitted from the luminaire. This enables a uniquely shaped transmission of light and/or removing unwanted spills and or glare emanating from the luminaire. The filter devices comprise a body that defines a clear section that allows full passage of light from the underlying luminaire, and an opaque section that allows partial or no passage of light. The filter devices also comprise an outer rim having a friction enhancing material that enables a snug engagement with the perimeter recess forming in the luminaire. The friction enhancing material of the outer rim restricts slippage when stacking multiple filter devices, and with the inside perimeter recess formed in the luminaire.

Abstract: A lighting device includes a light source configured to emit a light beam through an afocal projection optics along a propagation path of the light beam from a negative lens to a positive lens. The lighting device includes a further negative lens interposed and mobile along the propagation path of the light beam from the negative lens to the positive lens. The lighting device also includes an optical element interposed in the propagation path of the light beam between the negative lens and the further negative lens. The optical element includes a cylindrical lens, a prism or an axicon.

Abstract: The invention discloses a lamp with a zoom lens, which comprises the zoom lens and a lamp body, the lamp body is connected with the zoom lens, the zoom lens comprises: a rear fixed group, comprising a first biconvex lens; a zooming group, comprising a first concave-convex meniscus lens and a plano-convex lens; a compensating group, comprising a biconcave meniscus lens and a second concave-convex meniscus lens; and a front fixed group, comprising a second biconvex lens. The four groups are sequentially arranged in the direction of an optical axis; and the lamp realizes zooming by movement of the zooming group and the compensating group in the direction of the optical axis. A change of a pattern or a beam size is realized; the number of lenses is reduced; zooming of the zoom lens is realized only by movement of the zooming group and the compensating group.

Abstract: A color display device (D) is provided, including a colored light-transmitting base material (10), a light-blocking base material, and a light source unit (30) that has at least a part located between the colored light-transmitting base material (10) and the light-blocking base material (20), in which the colored light-transmitting base material (10) has a total light transmittance of 18% or less, and in which the light source unit (30) is disposed such that emission light transmits through the colored light-transmitting base material (10), the color display device having excellent designability and high luminance.

Abstract: An apparatus (10) for increasing a pulse length of a pulsed radiation beam, the apparatus comprising: a beam splitter (16) configured to split an input radiation beam (18) into a first beam (24) and a second beam (22); an optical arrangement (12, 14), wherein the beam splitter and the optical arrangement are configured such that at least a portion of the first beam is recombined with the second beam into a modified beam after an optical delay of the first beam caused by the optical arrangement; and at least one optical element (30) in an optical path of the first beam, the at least one optical element configured such that the phase of different parts of a wavefront of the first beam is varied to reduce coherence between the first beam and the second beam.

Abstract: Disclosed is a lamp, including a lamp body in a trough shape, a light source assembly, and a heat dissipation assembly; where, the heat dissipation assembly includes an aluminum plate, a heat dissipation fin and a glass radiator; the aluminum plate is disposed on a trough wall of the lamp body; the heat dissipation fin is disposed on a side of the aluminum plate; the glass radiator is disposed on a side of the aluminum plate; the light source assembly includes a PCB board and a plurality of LED lamp beads; the PCB board is disposed on a side of the glass radiator; and the plurality of LED lamp beads are arranged on a side of the PCB board forming a light emitting surface.

Abstract: Lit image projection devices and lamp assemblies containing the same for generation of three dimensional images. A projection device of the present disclosure comprises one or more light sources, a rippled substrate defining a reflective surface, the reflective surface configured to reflect light source light from the one or more light sources as reflected light, and a first lenticular lens configured to receive the reflected light from the reflective surface, wherein the reflected light received by the first lenticular lens generates a three-dimensional lit image.

Abstract: The present invention relates to a lighting device for the complete and precise projection of a light beam comprising a light source, a plate and a light focusing system, the plate comprising an aperture, the light source and the light focusing system being on a first side of the plate, the light source and the light focusing system being configured for projection of a light beam from the aperture, the light focusing system comprising a collimator, two biconvex and one biconcave lenses. The invention also relates to a method for completely and precisely illuminating an object or space through an aperture.

Abstract: A luminaire bezel attachment assembly with a lens that is defined by a lens body with one or more bezel engagement keyways, and a flange around the lens body. An inner bezel is coupled to the lens and defined by one or more inner bezel keys receivable within the corresponding one of the one or more bezel engagement keyways of the lens. An outer bezel is coupled to the lens and defined by one or more outer bezel keys that are receivable within the corresponding one of the one or more bezel engagement keyways of the lens. The outer bezel keys overlap the corresponding one of the one or more inner bezel keys.

Abstract: A luminaire includes a white light LED light source emitting a light beam that that is filtered by first and second color filters. An optical device modifies the filtered light beam. A control system receives a commanded value for the optical device and responds by causing the optical device to move based on the commanded value; determining a Duv change in the light beam caused by the optical device; determining positions for the color filters based on the Duv change, a current correlated color temperature (CCT) isotherm value, and a current Duv value; and moving the color filters to their determined positions. The control system may alternatively receive a command with a Duv value and respond by determining color filters positions based on the received Duv value and a current CCT isotherm value; and moving the color filters to their determined positions.

Abstract: An LED lens array for a direct type backlight device, according to the present disclosure, comprises: a plurality of LED lenses disposed on a plane; and a plurality of lens strings connecting the plurality of LED lenses, wherein each of the plurality of lens strings extends from each side of each of the plurality of LED lenses, and is configured to allow light emitted from each of the plurality of LED lenses to pass therethrough, wherein the width of each of the plurality of lens strings is smaller than the diameter of each of the plurality of LED lenses.

Abstract: A light distribution module configured to control a light distribution of a light source is provided. The light distribution module includes a lens and an optical cover. The lens has a first light-incident surface, a first light-emitting surface opposite to the first light-incident surface, and an accommodating recess located at a side of the first light-incident surface, wherein the accommodating recess is configured to contain the light source. The optical cover covers the lens and has a second light-incident surface and a second light-emitting surface opposite to the second light-incident surface, wherein the second light-incident surface is located between the first light-emitting surface and the second light-emitting surface, and the second light-incident surface has a plurality of sub-curved surfaces. Boundaries between adjacent sub-curved surfaces are bent-shaped with respect to the adjacent sub-curved surfaces.

Abstract: A projection system for a vehicle, in particular for an ambient lighting device for generating a plurality of light cones for illuminating the ground in the surroundings of the vehicle, includes at least one light source and a microlens array. The microlens array includes an optical axis, a first portion with at least one first channel and a second portion with at least one second channel. The projection system includes an optical device that is provided downstream of the microlens array and is arranged at least in the area of the first portion, with the distance between the microlens array and the optical device being less than 20 mm.

Abstract: An end (that is, an end (130b)) of a second electrode (130) of a k-th light-emitting unit (152(k)) on a second side (S2) exists on the outer side of an end (152b) of the k-th light-emitting unit (152(k)) by the width WR(k) of an overlapping region (OR). In one example, the width WR(k) is equal to or greater than d×tan(arcsin(sin ?l(k)/ns)) and equal to or less than 3d×tan(arcsin(sin ?l(k)/ns)) (d×tan(arcsin(sin ?l(k)/ns))?WR(k)?3d×tan(arcsin(sin ?l(k)/ns))).

Abstract: The present application relates to the technical field of films and television lighting, and provides a lamp and an optical lens thereof, the lamp includes: a lamp body, a first housing and a second housing, the first housing is provided with slots, the second housing is movably sleeved inside the first housing, and an outer wall of the second housing is provided with a protruding member extending through the slots, the protruding member further simultaneously moves relative to the second housing while moves in the slot, to adjust a distance between the second housing and the lamp body. When the protruding member moves in the slot on the first housing, a part of the protruding member can also move relative to the second housing at the same time.

Abstract: A plant growth lighting fixture includes a lighting fixture main body having a light exit surface, a light source held on the lighting fixture main body, and a reflective-type circularly polarizing plate that selectively reflects circularly polarized light having a particular rotational direction in a particular wavelength range. The reflective-type circularly polarizing plate has a support and a circularly polarized light reflecting layer held on the support. The lighting fixture main body has a holding mechanism for detachably mounting the reflective-type circularly polarizing plate with a main surface of the reflective-type circularly polarizing plate facing the light exit surface.

Abstract: LED related lighting methods and apparatus are described. Various features relate to water tight light fixtures. Some of the fixtures are spotlights while other fixture are intended for in ground use. The light fixtures in at least some embodiments include power control features. In spotlight embodiments beam angle and power or light output can be controlled without opening the light assembly or compromising the water tight seals which also protect against dirt. In ground embodiments support tilt angle setting which allow a user to set the light fixture to one or more tilt angles. Beam angle can also be changed in some embodiments as well as power control. Beam angle, power control and tilt angle adjustments are supported in some embodiments but need not be supported in all embodiments with some embodiments using one or more of the described features but not all features.

Abstract: An optical module and a method of manufacturing an optical module are provided. The optical module includes a carrier, an electronic component, a lid, a diffuser and a bonding layer. The electronic component is disposed on the carrier. The lid is disposed on the carrier. The lid has a first cavity to accommodate the electronic component. The lid defines a first aperture over the first cavity. The diffuser is disposed within the first aperture. The bonding layer is disposed between the diffuser and a sidewall of the first aperture.

Abstract: The present disclosure relates to an asymmetric illumination lens and an illumination system implementing at least one such lens, for example for illuminating a stadium play field.

Abstract: A light distribution module configured to control a light distribution of a light source is provided. The light distribution module includes a lens and an optical cover. The lens has a first light-incident surface, a first light-emitting surface opposite to the first light-incident surface, and an accommodating recess located at a side of the first light-incident surface, wherein the accommodating recess is configured to contain the light source. The optical cover covers the lens and has a second light-incident surface and a second light-emitting surface opposite to the second light-incident surface, wherein the second light-incident surface is located between the first light-emitting surface and the second light-emitting surface, and the second light-incident surface has a plurality of sub-curved surfaces. Boundaries between adjacent sub-curved surfaces are bent-shaped with respect to the adjacent sub-curved surfaces.

Abstract: A light-guide sheet according to the present disclosure is a light-guide sheet that takes in incident light and waveguides light in a direction intersecting with an incident direction of the incident light inside the light-guide sheet. The light-guide sheet includes: a lower refractive index layer; a light-transmissive layer that is continuously stacked with the lower refractive index layer and has a refractive index that is higher than a refractive index of the lower refractive index layer; and a diffraction grating that is disposed on the light-transmissive layer and changes a travelling direction of the incident light. A pattern of the diffraction grating is divided into a plurality of partial patterns on the light-transmissive layer, and each of the plurality of partial patterns has a concentric circular shape or a concentric polygonal shape.

Abstract: A circumferentially light-emitting thermoplastic resin molded body which can be bent for use according to the type of optical ornaments or the shape of an object to be decorated and which allows the overall luminance of the emitted light to improve and restrains the luminescent color from being yellowed at the distal locations of such body with regard to the light source. The thermoplastic resin molded body has a core layer made from a thermoplastic elastomer; and a first clad layer made from a thermoplastic resin whose refractive index is smaller than the thermoplastic elastomer from which the core layer is made, in which a light diffusing agent is added to the thermoplastic elastomer from which the core layer is made and the thermoplastic resin from which the first clad layer is made respectively; and the total light transmittance of the first clad layer is defined as less than 70%.

Abstract: A lighting device assembly includes: a heat sink; a light source attached to one end of the heat sink; an optic assembly configured to pivot an optic about the light source; a housing member having a cavity in which at least a portion of the optic assembly is received; and an elastic member configured to press the optic assembly against the cavity to maintain an adjusted position of the optic.

Abstract: A backlight includes a plurality of light sources of at least three different colors disposed on a base substrate, and a plurality of grating units that are disposed on a light exit side of the plurality of light sources and are in one-to-one correspondence with the plurality of light sources. Each of the plurality of grating units is used for splitting light emitted by a corresponding one of the plurality of light sources to form in an array of uniformly distributed monochromatic spots, so that the backlight may form an array of colored spots in which at least three different colors of light spots are alternately arranged in sequence along a first direction, wherein the first direction is a row direction or a column direction of the array of colored spots.

Abstract: Optical system (2) for a spotlight (S), comprising a first optical element (3) and a second optical element (4), which are arranged optically one behind the other along a light-radiating axis (A), and an adjustment mechanism (5), which is coupled to the first optical element (3) and the second optical element (4) such that it can move the optical elements (3, 4) along the light-radiating axis (A) in such a way that the optical elements (3, 4) can be moved relative to one another between a distanced position, in which the optical elements (3, 4) are spaced apart along the light-radiating axis (A), and an adjacent position, in which the optical elements (3, 4) are arranged closer to one another than in the distanced position, and wherein the adjustment mechanism (5) is further coupled to the first optical element (3) and the second optical element (4) such that the optical elements (3, 4), when they are in the adjacent position, can be moved together along the light-radiating axis (A) while maintaining said adj

Abstract: A light device includes a light guide member having first, second and third portions. An array of light-modifying elements are formed on one main surface of the light guide member, and each light-modifying element having surfaces inclined with respect to at least one of the main surfaces of the light guide member. The light-modifying elements are configured to diffuse incident light. A light source (or light sources) is provided on a substrate, and configured to project light along a thickness direction of the light guide member. The first and third portions of the light guide member are provided at different distances from the substrate, with the second portion being inclined to an acute angle with respect to the substrate.

Abstract: A vehicle lighting system includes, among other things, a grille that extends across an opening in a vehicle. The system also includes a light bar assembly having lights that are disposed aft the grille relative to a general orientation of the vehicle. The lights are configured to be activated to emit light through grille openings.

Abstract: A light ring assembly for a smart-home device may include a plurality of light-emitting diodes (LEDs) and a light guide, where the light guide may include a plurality of cutouts that receive the plurality of LEDs, and a plurality of transmissive sections between the plurality of cutouts. The light ring assembly may also include an output surface that receives light emitted from the plurality of LEDs through the plurality of transmissive sections, where the output surface is substantially circular. The light guide may also include a plurality of micro-lenses in the plurality of transmissive sections where a relative density of the micro-lenses increases as the transmissive sections extend away from the plurality of cutouts.

Abstract: A method for generating a beam of light that impinges on a target, wherein beam intensity remains substantially constant regardless of beam spot size. The method involves: providing a light source, a lens that can be moved to or between various positions, a slide having positions at which the lens may be supported, a target at which a beam is directed and a controller that communicates between an optical position feedback encoder and the light source; linking the encoder and the lens, the encoder sending a lens position signal to the controller, including an encoder translator circuit which communicates with a microprocessor that receives user inputs which characterize desired beam size at the target; generating a light source power signal to the light source so that electrical power delivered by the light source changes in response to the position of the lens.

Abstract: Light emitting unit, in particular of or for a triangulation-based distance measuring device, for providing defined measuring light, in particular laser light, is disclosed. The light emitting unit comprising a light source for emitting light, in particular a laser light source for emitting laser light, and a beam forming assembly for shaping the light by affecting propagation of the light emitted by the light source, wherein the beam forming assembly is arranged and designed so that measuring light is provided in form of a light line having a midpoint and two opposite ends. The beam forming assembly comprises at least one micro-lens array, the at least one micro-lens array comprises a plurality of micro-lenses, wherein the micro-lenses are designed and arranged in joint manner next to each other with algebraic signs for curvatures of successive micro-lenses being opposite and so that a periodic structure is provided.

Abstract: The light source device of the present invention has a light source unit having a plurality of LED elements; a first optical system that collimates each of light emitted from the light source unit; and a second optical system that collects a plurality of light emitted from the first optical system. At least one of the light source unit and the first optical system is provided with an adjustment mechanism for adjusting a positional relationship between the light source unit and the first optical system relative to each other.

Abstract: The light source device of the present invention has a light source unit having a plurality of LED elements; a first optical system that collimates each of light emitted from the light source unit; and a second optical system that collects a plurality of light emitted from the first optical system. At least one of the light source unit and the first optical system is provided with an adjustment mechanism for adjusting a positional relationship between the light source unit and the first optical system relative to each other.

Abstract: A lighting and/or signaling device comprising a light guide which extends from a light input and diffusion wall to a light output wall that realizes a lighting portion, at least one LED light source, suitable to emit a light beam and facing a light input portion of said light input and diffusion wall. The lighting portion includes a central lighting portion and a peripheral lighting portion, surrounding the central lighting portion, the light guide being provided with extraction elements arranged on the light input and diffusion wall. A hologram is arranged between the LED light source and the light input portion so as to distribute according to a predefined pattern the light rays emitted by the LED light source and obtain a predefined luminance on the central lighting portion and the peripheral lighting portion.

Abstract: A projection device including at least one projection module and at least one adjusting structure is provided. The projection module has at least one optical axis. The projection module is adapted to provide an image beam. The image beam is transmitted along a light transmission path to a projection target and forms a projection image. The adjusting structure is connected to the projection module. The adjusting structure is adapted to drive at least a part of the projection module to rotate along the optical axis such that the projection image rotates.

Abstract: A lighting device assembly includes: a heat sink; a light source attached to one end of the heat sink; an optic assembly configured to pivot an optic about the light source; a housing member having a cavity in which at least a portion of the optic assembly is received; and an elastic member configured to press the optic assembly against the cavity to maintain an adjusted position of the optic.

Abstract: A collimator (3) for a color over position light source (2) is provided. The collimator (3) comprises a focal point (F), an optical axis (OA) containing the focal point (F), an imaging element (4) arranged around or on the optical axis (OA) and several light spreading elements (5, 11, 12) ranged around the optical axis (OA) to receive at least one image from the imaging element (4). The light spreading elements (5, 11, 12) have different light beam widening characteristics, the light beam widening characteristics of each light spreading element (5, 11, 12) of said light spreading elements (5, 11, 12) depending on the position of the light spreading element (5, 11, 12) relative to the focal point (F). The light spreading elements (5, 11, 12) are adapted to spread light striking the light spreading elements (5, 11,12) in a first plane (M) including the optical axis (OA). A method for collimating light from a color over position light source (2) is also provided.

Abstract: The present invention relates to a projecting light fixture comprising at least one LED generating light beam and a projecting system positioned configured to project the light beam along an optical axis. A beam shaping object is arranged between the LED and the projecting system and comprises a least two different beam shaping patterns, which can be arranged in the source light beam upon rotation of the beam shaping object in relation to the light beam. An actuator is configured to continuously rotate the beam shaping object in relation to the source light beam in order to alternately arrange the beam shaping patterns in the light beam. The projecting light fixture comprises a synchronizer providing a synchronizing signal indicative of: the rotation speed and/or the angular position of the beam shaping object; the position of beam shaping patters in relation to the light beam. Where a controller is configured to toggle the LED between a LED on-period and a LED off-period based on the synchronizing signal.

Abstract: An apparatus can include a lens that can shape light emerging from a light emitting diode (LED). The emergent light from the LED can be substantially centered around an LED axis. An incident surface of the lens can be positioned to face the LED. The incident surface can include a concave portion. The concave portion can be substantially smooth, so as not to substantially scatter light that strikes the concave portion. The concave portion can be substantially centered around a concave portion axis that is non-coaxial with the LED axis. The incident surface can include a scattering portion, positioned away from the concave portion, which can be textured so as to scatter light that strikes the scattering portion. An exiting surface of the lens can optionally include a generally planar portion that at least partially surrounds a substantially smooth convex portion.

Abstract: A vehicle grille assembly is provided herein. The grille assembly includes a panel sealingly coupled to a substrate and defining a cavity therebetween. A light source is disposed within the cavity. A diffuser is disposed between the light source and a portion of the panel.

Abstract: To effective cool inside a lens casing in an LED lighting apparatus that hermetically houses LED elements in the lens casing, the present LED lighting apparatus includes a tubular lens casing having a first end face at which lighting lenses are provided and a second end face, a substrate on which LED elements are mounted, and a base part provided on the second end face side of the lens casing. The base part has a concave part housing therein the substrate. The lens casing is coupled to the base part by a coupling part with the second end face thereof fitted to the concave part, thereby sealing the internal space of the lens casing. The base part has heat radiating columns formed to protrude therefrom to an outside space, and the heat radiating columns radiate heat that the LED elements generate in the internal space through heat exchange with air.