Abstract: An optical system includes a light guide member having an incident surface, a first surface and a light emergent surface; and at least one prism provided on the first surface and configured to reflect light received by the incident surface and travelling inside the light guide member, towards the light emergent surface. The light guide member provides an optical path along which the light that has entered through the incident surface is directly reflected from the prism and allowed to emerge from the light emergent surface. The light guide member also provides another optical path along which the light that has entered through the incident surface is once reflected from the second surface, reflected again from the prism, and then allowed to emerge from the light emergent surface. The optical system is configured to be coupled to a light source, to illuminate a display system which projects a virtual image onto a target space.

Abstract: A high-color-gamut quantum dot lens and a method for manufacturing a backlight module are provided. The method includes: mixing quantum dots with an acrylic resin, carrying out mixing granulation on the quantum dots and the acrylic resin by using an internal mixer to obtain quantum dot acrylic particles, carrying out injection molding on an acrylic material containing quantum dots to obtain a quantum dot lens, and then spraying a water and oxygen resistant transparent material on the surface of the injection-molded quantum dot lens for encapsulation. Light emitted from a white LED chip irradiates onto the quantum dot lens, and an RGB independent spectrum is superposed on a common fluorescent powder spectrum by means of a quantum dot light conversion material; and the superposed spectrum obtained thereby passes through an LCD screen, and a color display screen with a high color saturation and a wide color gamut will be obtained.

Abstract: A display device (100) includes a display panel (110), a first light source (E), and second light source (F). The first and second light sources (E, F) are respectively aligned with a first spot (5) and second spot (6) in a direction perpendicular to a substrate (310). The first light source (E) irradiates the first spot (5) and a third spot (M) with luminance of a first value, and irradiates the second spot (6) with luminance of a second value. The first light source (E) irradiates a midpoint (N?) between the first and second spots with a luminance value that is half of the addition of the first value and second value.

Abstract: A display apparatus including a heteromorphy lens disposed on a path of light emitted from a light-emitting device, a side surface of the heteromorphy lens toward a first direction has a shape different from a side surface of the heteromorphy lens toward a second direction perpendicular to the first direction, so that light can be condensed in the first direction and diffused in the second direction due to the heteromorphy lens, and the reduction in luminance can be minimized, and the viewing angle can be limited.

Abstract: A light pipe includes at least two optical structures having different refractive indices. An interface between the two optical structures is oblique to a longitudinal axis of the light pipe such that an output ray from an output surface at a distal end of the light pipe is non-parallel to an input ray that is parallel to the longitudinal axis at an input surface at a proximal end of the light pipe. Light refracts inside the light pipe between the (at least) two optical structures altering the direction of an optical path of the light through the light pipe, thereby allowing higher degrees of freedom for the selection of the angle of deviation (folding angle) of the light pipe. By optimizing various parameters of the light pipe, a desired output optical axis angle (i.e., folding angle) can be achieved that suits the desired optical engine envelope.

Abstract: Light control body (6) has first incident surface (7) and first reflection surface (9). First incident surface (7) condenses part of light emitted from light source (1) and emits the light toward incident surface (3) of light guide plate (2). First reflection surface (9) reflects the light that is emitted from light source (1) and does not pass through first incident surface (7), and emits the light toward incident surface (3) of light guide plate (2). First focal position (11) of first incident surface (7) and second focal position (12) of first reflection surface (9) are set at positions that are different from each other and away from the light emission surface of light source (1).

Abstract: A lamp includes a light source, a central lens optically aligned with the light source to receive a first portion of light emitted by the light source and transmit the first portion of light in a first output beam, a side emitting lens generally disposed between the central lens and the light source and arranged to receive a second portion of the light, and a plurality of light guides each having a light input end and operatively coupled to the side emitting lens to receive the second portion of light emitted from the light source that is directed through the side emitting lens and having a light output end, wherein each of the plurality of light guides has a light refraction structure on a first side for directing the second portion of the light in a second output beam from a second side.

Abstract: A head-mounted display device includes a display panel (such as a liquid crystal display), an optics system for focusing a portion of the display onto an eye of a user, and a backlight assembly including a light guide, a plurality of extraction features positioned on a surface of the light guide, and at least one laser diode for directing light into the light guide. The light guide is sized and dimensioned to illuminate only a portion of the display that is focused by the optics system; with the plurality of light extraction features configured to diffuse light toward the display panel for back illuminating the display panel.

Abstract: A lens includes an incident surface through which outgoing light enters the lens, the incident surface being formed at a portion opposed to a light source, and an emission surface through which incident light incident on the incident surface exits from the lens. The incident surface refracts outgoing light in a direction away from an optical axis of outgoing light, along a direction orthogonal to the optical axis. The emission surface refracts incident light in a direction away from a centerline of incident light, along a direction orthogonal to the centerline.

Abstract: The present disclosure provides a light bulb for use in a lamp housing of a vehicle. The light bulb includes a bulb body assembly having one or more light sources fixedly attached thereto, and a mounting assembly configured to mount on the lamp housing. The bulb body assembly and the mounting assembly are connected by a rotatable joint such that positions of the one or more light sources can be adjusted after the mounting assembly is mounted on the lamp housing. In some embodiments, a key portion is attached to the bulb body assembly to rotate the bulb body assembly relative to the mounting assembly.

Abstract: A stellate beam splitter includes a light cavity for receiving a light source and a plurality of radial arms oriented around the light cavity, the plurality of radial arms oriented to concentrate light entering each of the plurality of radial arms at an end proximate to the light cavity and provide concentrated light at an end distal to the light cavity.

Abstract: A lens diffusing light emitted from a light source includes a concave light-incident surface, a light guide portion, and a light-emitting surface. The light-incident surface includes a plane portion opposed to the light source and an optical function portion that is formed on the plane portion and one of scatters and diffuses the light. The light emitted from the light source enters the light-incident surface. The light that has entered the light-incident surface passes through the light guide portion. The light-emitting surface emits the light passed through the light guide portion.

Abstract: A light flux controlling member for controlling a distribution of light emitted from a light-emitting element includes an incidence surface configured to allow the light to enter the light flux controlling member; an emission surface configured to emit light; and a reflection part including an inclined surface configured to reflect light entered from the incidence surface, wherein in a cross-section, a region where light emitted from a light emission center of the light-emitting element that is entered from the incidence surface and sequentially reflected by the emission surface and the inclined surface reaches in the emission surface includes a portion where a derivative value of a gradient of a tangent to a given point in the emission surface is 0, or a portion where a sign of the derivative value reverses.

Abstract: The invention relates to a torch having a housing in which at least one LED secured to a carrier element, and a lens system, are arranged and can be displaced relative to one another in order to focus the cone of light that is emitted. According to the invention, a seal consisting of a membrane (14) closes the space (23) between the LED (11) and the lens system (13) in a watertight and dust-proof manner.

Abstract: An optical device for modifying a light distribution pattern of a light source is presented. The light source radiates first light beams to a first geometric quarter-space and second light beams to a second geometric quarter-space, where the first and second quarter-spaces are defined by mutually perpendicular geometric planes one of which constitutes a boundary between the first and second geometric quarter-spaces. The optical device includes a lens-section for modifying a light distribution pattern of the first light beams and two reflector surfaces for reflecting the second light beams from the second geometric quarter-space to the first geometric quarter-space. The two reflector surfaces are successively in a direction perpendicular to the boundary between the first and second geometric quarter-spaces and make it possible that the optical device can be lower than in a case where only one reflector surface is used.

Abstract: An illuminating device includes a light source and a light-pattern generating member. The light source emits an incident light. The light-pattern generating member is disposed on a side of the light source to receive the incident light. The incident light passes through the light-pattern generating member so as to generate a transmission light. The transmission light generates a light pattern. A light intensity distribution is formed by the light pattern, and a light intensity near the light source is equal to a light intensity far from the light source.

Abstract: Lighting systems that include an LED and a silicone module designed to contain a lens are described herein.

Abstract: A luminaire includes a receiving element for a rotationally symmetrical glass body with a receiving opening, a rotationally symmetrical glass body arranged in the receiving opening and an annular, permanently elastic element arranged between the receiving element and the glass body, wherein the receiving element is formed with a support surface which is inclined towards the glass body and the glass body is formed with a receiving surface diametrically opposite to the support surface. The permanently elastic element is positioned in the installed state between the support surface and the receiving surface in order to fix the receiving element and the glass body positively and concentrically to each other. An annular gap is provided between glass body and receiving element for introducing the annular, permanently elastic element between support surface and receiving surface. A method for fastening the glass body in the receiving element is provided.

Abstract: An light bulb includes a bulb housing, a heat sink, and a head housing arranged in series along a longitudinal axis of the light bulb. The light bulb includes a first filament having a first LED chip capable of emitting a first light with a first color characteristic, and a second filament having a second LED chip capable of emitting a second light with a second color characteristic. The first filament and the second filament are spiral along a transverse axis perpendicular to the longitudinal axis of the light bulb. The light bulb further includes a driving module configured to enable one or a combination of the first filament and the second filament to emit light.

Abstract: There is provided an optical system, including a light-transmitting substrate (20) having at least two external major surfaces and edges, an optical element for coupling light waves into the substrate (20) by internal reflection, at least one partially reflecting surface located in the substrate (20), for coupling light waves out of the substrate (20), at least one transparent air gap film (110) including a base (112) and a hyperfine structure (111) defining a relief formation, constructed on the base, wherein the air gap film is attached to one of the major surfaces of the substrate (20), with the relief formation facing the substrate (20) defining an interface plane (58), so that the light waves coupled inside the substrate (20) are substantially totally reflected from the interface plane (58).

Abstract: The invention provides a lighting device (100) comprising a plurality of light source packages (110) each light source package (110) comprising a light source (10) and a polarizer (20) configured to polarize light source light (11) of said light source (10), wherein the light source packages (110) are individually controllable, wherein the light source packages (110) are configured to provide polarized light source light (11) with at least two different polarization states (p1,p2), and wherein the light source packages (110) share a light exit window (120) for escape of the light source light (11) from said lighting device (100).

Abstract: A light bulb includes a bulb housing, a heat sink, and a head housing arranged in series along a longitudinal axis of the light bulb. The light bulb includes a first filament having a first LED chip capable of emitting a first light with a first color characteristic, and a second filament having a second LED chip capable of emitting a second light with a second color characteristic. The first filament and the second filament are spiral along a transverse axis perpendicular to the longitudinal axis of the light bulb. The light bulb further includes a driving module configured to enable one or a combination of the first filament and the second filament to emit light.

Abstract: An LED light unit comprises a support portion, a light source having at least one LED, the light source being arranged on the support portion and having a source-side light intensity distribution (LISS), and a refractive optical element having an inner surface and an outer surface, with at least one of the inner surface and the outer surface being non-spherical, the refractive optical element being arranged over the light source and being attached to the support portion.

Abstract: An illumination device comprising a plurality of solid state light sources and a concentrating wave length converter arranged to inject light from said light sources through at least one entrance surface and to extract wave length converted light from at least one exit surface, comprising a structured layer provided on said exit surface, said structured layer having a structure period less than 5 micrometers, thereby enabling out-coupling through the exit surface by a combination of refraction and diffraction. In a situation where the angle of incidence on a surface is within a limited range, a combination of refraction and diffraction may provide a superior out-coupling from that surface.

Abstract: There is provided an optical system, including a light-transmitting substrate (20) having at least two external major surfaces and edges, an optical element for coupling light waves into the substrate (20) by internal reflection, at least one partially reflecting surface located in the substrate (20), for coupling light waves out of the substrate (20), at least one transparent air gap film (110) including a base (112) and a hyperfine structure (111) defining a relief formation, constructed on the base, wherein the air gap film is attached to one of the major surfaces of the substrate (20), with the relief formation facing the substrate (20) defining an interface plane (58), so that the light waves coupled inside the substrate (20) are substantially totally reflected from the interface plane (58).

Abstract: A lighting device (100, 600) comprises a first portion (110, 610), a solid state light source (120, 620), a second portion (130, 630), a metal heat sink (140, 640-641) and a connector (150). The first portion is arranged for electrically connecting the lighting device. The second portion is mounted on the first portion and has an outer surface, wherein at least a portion (131, 631) of the outer surface is light transmissive for outputting light originating from the solid state light source. The metal heat sink extends along the outer surface, and is arranged in thermal contact with the solid state light source. The connector is arranged at the metal heat sink for connecting an electrical device (160, 660). A distance (D1, D3, D4) from the first portion to the connector is longer than a distance (D5) from the first portion to at least one light transmissive portion (131, 631) of the outer surface.

Abstract: A slim lighting fixture is disclosed. Keyhole slots are provided along outer surrounding edge of the lighting fixture. A disposable guide plate is employed to mark locations of screws corresponding to the keyhole slots. Step-screws are installed on the locations marked. The lighting fixture is engaged with step-screws at the keyhole slots through recess, slide and lock. Alternatively, an engagement may be accomplished by screws inserted through the keyhole slots, slid and tightened. A decorative cover is designed to fit the lighting fixture at the outer surrounding edge. An indirect mounting system is provided. A lighting fixture has a recess and side slot at each of four quadrants of a back plate. A mounting plate has four clips corresponding positions of the recess. The lighting fixture is engaged with the mounting plate at the clips and recess/side slot through recess, slide and lock.

Abstract: A light-emitting element includes a rectangular light emitting element with four edge surfaces; and a light flux control member defining a central axis and having a back surface, light entry surface formed as a recess in the back surface, a light emission surface disposed opposite the back surface, and a plurality of protruding elements forming a grid on the back surface. The grid of protruding elements include a plurality of linear ridges/valleys such that the angles formed by such linear ridges/valley and a plane including at least one of the edge surfaces of the light emitting element is an acute angle; or the grid of protruding element include a plurality of annular ridges/valley centered about the central axis, and a plurality of linear ridges/valleys disposed radially around the central axis.

Abstract: A projecting lamp structure having a light adjusting device is provided. The projecting lamp structure includes a light source disposed on a circuit board and configured to provide light rays. A lens having an asymmetrical bat-wing candle power distribution is disposed on the circuit board, wherein the lens is configured to receive the light rays and emits the light rays. A light adjusting device is disposed on the circuit board and surrounding the lens having the asymmetrical bat-wing candle power distribution. The light adjusting device includes an opening and the light adjusting device is configured to adjust the light rays through the opening to form an illumination region having a preset shape by adjusting a geometric shape of the opening corresponding to the lens having the asymmetrical bat-wing candle power distribution.

Abstract: A light source, for example a light emitting diode, can emit light and have an associated optical axis. The source can be deployed in applications where it is desirable to have illumination biased laterally relative to the optical axis, such as in a street luminaire where directing light towards a street is beneficial. The source can be coupled to an optic that comprises a cavity. At least a portion of the cavity can have an outline that is egg-shaped in cross section. A backside of the cavity (or a backside portion of the optic) can have an irregular shape for receiving the light emitting diode, for example to form a receptacle shaped to fit a circuit.

Abstract: A light flux controlling member includes an incidence surface, an emission surface, and an annular groove part. The annular groove part includes a first internal surface and a second internal surface. The second internal surface protrudes from a virtual line connecting an outer and inner end portions toward an opening side of the annular groove part; and, when an angle on the annular groove part side of two angles between a tangent to an arbitrary point of the second internal surface and the central axis is an inclination angle at the arbitrary point of the second internal surface in the cross section including the central axis, an inclination angle at the inner end portion is smaller than an inclination angle at the outer end portion, and an inclination angle of the second internal surface increases as a distance from the central axis increases.

Abstract: Embodiments of the present disclosure provide a light emitting device and display equipment. The light emitting device, includes a light emitting diode (LED) and an optical lens, the optical lens including a light incident surface and a light emergent surface, the light incident surface including a free-form convex surface; wherein there is a first angle between a symmetry axis and the connecting line between the center point of the light emitting surface and any point on the light incident surface, and the curvature of the light incident surface decreases with the increase of the first angle; there is a second angle between a symmetry axis and the connecting line between the center point of the light emitting surface and any point on the light emergent surface, and the curvature of the light emergent surface increases with the increase of the second angle.

Abstract: The disclosure relates to an LED lamp and an optical lens thereof. The optical lens includes a dome structure and a protrusion structure, the dome structure has an external surface, the protrusion structure is disposed on the external surface of the dome structure; the protrusion structure has a first optical surface and a first optical side connected with the first optical surface, the first optical surface and the external surface are connected to form a first boundary, the first optical side and the first boundary are inclined. The disclosure further provides an LED lamp. The LED lamp and the optical lens thereof above can improve optical efficiency.

Abstract: An illumination device includes a bulb including a segment of at least second order curvature and a cylindrical segment. A least two laser diodes are coupled with the bulb such that laser beams emitted by the at least two laser-diodes propagate inside the bulb through total internal reflection. The laser beams propagating in the bulb expand in the bulb, are evenly mixed and exceed outward from the bulb as a volumetric light flux.

Abstract: A light module, comprising numerous semiconductor light sources for emitting light, a primary lens element for concentrating the light emitted from the semiconductor light sources in section perpendicular to a sagittal plane of the light module, wherein the primary lens element exhibits numerous disk-like light conducting sections, extending in a plane perpendicular to the sagittal plane, wherein each light conducting section exhibits a light coupling surface and a light decoupling surface, and is designed for conducting light, subjected to a total reflection, from the light coupling surface to the light decoupling surface, wherein a semiconductor light source is allocated to each light conducting section such that light form the semiconductor light source can be coupled with the respective light coupling surface in the light conducting section.

Abstract: Devices (100) comprise light sources (1) for producing light into directional ranges (70) and light blockers (10) for blocking the light in parts (71) of the directional ranges (70). The light blockers (10) have inner sides (11) and outer sides (12), and are made of materials having optical indices. Combinations of shapes of the outer sides (12) and the optical indices will reflect the light in the parts (71) of the directional ranges (70) at the outer sides (12), for example back to the light sources (1). The shapes of the outer sides (12) may be saw tooth shapes, the optical indices may be larger than 1.4, total reflection may take place for the light in the parts (71) of the directional ranges (70) when incoming at angles smaller than 40° with sides (14, 15) of saw teeth (13) of the saw tooth shapes. Shapes of the inner sides (11) may correspond with shapes of light output graphs of the light sources (1) in the parts (71) of the directional ranges (70).

Abstract: A lens includes a light incident surface and a light output surface. In a coordinate system, the light incident surface satisfies a formula (1): Z r 1 = c 1 ? r 1 2 1 + 1 - r 1 2 ? c 1 2 + u 1 2 ? ( 1 - u 1 2 ) 1 - r 1 2 ? c 1 2 ? ? m = 0 M ? a m ? Q m ? ( u 1 2 ) . c1 is a curvature of the light incident surface. r1 is a distance from the center of the lens to a joint point between the light input surface and a radius which is substantially perpendicular to the central axis of the lens. u1 is a normalized radius of the light incident surface. am represents the aspheric coefficient. Qm is a polynomial of order m and represents that the sum of am is equal to the sum of the root mean square of the slope of the light incident surface.

Abstract: A transparent polyamide resin composition includes a transparent polyamide resin which is a copolymer of an alicyclic diamine and a dicarboxylic acid and which has a refractive index of 1.500 to 1.550, and a transparent crosslinking auxiliary having a refractive index of 1.500 to 1.550, in which the amount of the crosslinking auxiliary added is 13 to 26 parts by mass relative to 100 parts by mass of the transparent polyamide resin, and the crosslinking auxiliary is dispersed, as phases with a diameter of 350 nm or less, in the transparent polyamide resin. A crosslinked transparent polyamide resin molded body is obtained by molding the transparent polyamide resin composition and crosslinking the transparent polyamide resin.

Abstract: The invention shows and describes, among others, a light fixture (10) for illuminating building surfaces, comprising a circuit board (11) on which a plurality of LEDs (12a, 12b, 12c) are mounted, secondary optics (14) that bundle the light emitted by the LEDs, and tertiary optics (16) formed by a planar, translucent element that has light-directing microstructures.

Abstract: A lens for distribution of light from a light emitter having an emitter axis. The lens includes an inner surface defining an inner cavity and including a substantially cross-sectionally convex inner region along an open end of the inner cavity and a substantially cross-sectionally linear inner region joining the substantially cross-sectionally convex inner region and extending therefrom toward the emitter axis. The convex region is configured for refracting emitter light rays toward the emitter axis. The lens further includes an outer surface receiving the light from each of the inner regions. A lens flange surrounds the lens and has an outer flange surface extending radially outwardly from the lens outer surface at positions axially spaced from the light emitter. The convex inner region is configured to refract emitter light to the outer surface such that the outer flange surface is substantially free from receiving any emitter light.

Abstract: The present disclose relates to a lens. The lens includes a bottom surface; a light input surface depressed from a center of the bottom surface; a light output surface opposite to the light input surface, the light output surface comprising a concave surface located at a center thereof and a convex surface surrounding the concave surface; and total reflective side surfaces. The side surface includes a first and a second side surfaces gradually slanting outwardly along a direction from the bottom surface to the light output surface, and a third side surface and a fourth side surface being perpendicular to the bottom surface. The present disclose also relates to a light source module with the lens.

Abstract: A solid state light having a solid state light source such as LEDs, a light guide having an enclosed interior volume such as a bulb shape without vents, and a thermal guide. The light guide is coupled to the light source for receiving and distributing light from the light source. The thermal guide is at least partially contained within the interior volume with an air gap between a portion of the thermal guide and the light guide. The thermal guide provides for thermal conduction from the light source and dissipating heat through convection and radiation for cooling the light.

Abstract: The present disclose relates to a light source device, which includes a first lens, a second lens, a third lens and a light source. The first lens includes a first light input surface and a first convex surface opposite to the first light input surface. The first convex surface has a first curvature. The second lens includes a second light input surface and a second light output surface opposite to the second light input surface. The second light input surface defines a concave surface at a center thereof. The third lens includes a deviating portion arranged between the first convex surface of the first lens and the concave surface of the second lens. A light source faces the first light input surface of the first lens.

Abstract: A light source, for example a light emitting diode, can emit light and have an associated optical axis. The source can be deployed in applications where it is desirable to have illumination biased laterally relative to the optical axis, such as in a street luminaire where directing light towards a street is beneficial. The source can be coupled to an optic that comprises a cavity. At least a portion of the cavity can have an outline that is egg-shaped in cross section. A backside of the cavity (or a backside portion of the optic) can have an irregular shape for receiving the light emitting diode, for example to form a receptacle shaped to fit a circuit board on which the light emitting diode is mounted.

Abstract: An LED module includes an LED, a light guiding plate and a lens. The light guiding plate includes a light incident face confronting the LED, a light diffusion face and a light emerging face. The lens includes an aspheric light incident face and an aspheric light emerging face opposite to the aspheric light incident face. Light emitted from the LED is diffused by the light guiding plate and diverged by the lens to have a wide illumination area.

Abstract: A light source device includes a lens and a light source disposed under the lens. The lens has a light-emitting top surface and a bottom surface opposite to the light-emitting top surface. The bottom surface concaves towards the light-emitting top surface to form a hole and has a gouge surrounding the hole with an inclination towards the edge of the hole. The hole is formed from the surrounding of a first inner wall surface and a second inner wall surface. The light source is disposed below the bottom surface and corresponds to the hole.

Abstract: An illumination device including a base, at least one LED light source and a first diffusing element is provided. The base has a supporting plane. The LED light source disposed on the supporting plane has a light emitting surface substantially parallel to the supporting plane. The first diffusing element disposed on the supporting plane is a hollow column surrounding the LED light source. An inner diameter width of the first diffusing element is gradually reduced outward from the base. The first diffusing element has a rough surface comprising a plurality of surface structures.

Abstract: The invention relates to an optical device for imparting an asymmetrical light beam. The optical device comprises a lens (10) having an exit diopter (12) having an exit surface consisting of a convex surface (16) defining a curved rear portion (18) having a first curvature and a curved front portion (19) having a second curvature different from the first curvature. Furthermore the lens (10) comprises an entry diopter (11) including at least one concave lodging (13) for lodging at least one light source, the surface of the concave lodging (13) facing at least partly the curved rear portion (18).

Abstract: Certain example implementations of the disclosed technology include a light emitting device. The light emitting device may include an enclosure with four sides and a top edge surface associated with each of the four sides. The enclosure may be capable of mounting on a grid frame of a suspended ceiling such that a portion of the top edge surfaces contacts a portion of the grid frame. The light emitting device may further include a light modifying element characterized by a substrate with four or more edges, a back surface disposed on the top edge surface of each of the four sides of the enclosure, and a front surface. In certain example embodiments the substrate may further comprise two or more edge trusses. A periphery of the light-emitting front surface may be capable of contacting the grid frame after the light emitting device is mounted to the grid frame.

Abstract: A display has a member irradiated by a surface light source device comprising a light diffusion member and emission device. The emission device is provided with a light flux control member having a recess and light control emission face which is configurated so as to satisfy Conditions 1 and 2 in a range at least covering a half-intensity-angular-range. Light emitting element(s) may be sealed. Condition 1 is that relation ?5/?1>1 is satisfied except for light emitted from a light emitting element toward within an angular-neighbourhood of a standard optical axis of the emission device, and Condition 2 is that value of ?5/?1 decreases gradually according to increasing of ?1, where ?1 is an emission angle of any light at being emitted from the light emitting element, and ?5 is an emission angle of that light of ?1 at then being emitted from the light control emission face of the light flux control member.