Abstract: This invention relates to a light guide lens adapted for guiding light emitted from a light emitting element. The light guide lens includes a base portion disposed on a light axis (L) and including a light incident surface, and a light guide portion surrounding the light axis (L) and disposed on the periphery of the base portion. The light guide portion includes an inner peripheral edge connected to the base portion, an outer peripheral edge opposite to the inner peripheral edge, and at least one light control unit connecting the inner and outer peripheral edges and having first and second light guide sections so as to form a varied light pattern.

Abstract: An optical component has an elongate length extending between first and second ends and a width transverse to and substantially smaller than the length and extending between first and second sides. The optical component includes a refractive portion disposed between the first and second sides and extending along the length between the first and second ends, and a plurality of separate reflective portions. At least one of the plurality of separate reflective portions is spaced from the refractive portion and extending along the length between the first and second ends.

Abstract: A luminous flux control member (100) has: a light input region (110), to which light having been outputted from a light emitting element (210) is inputted; and a light output region (150), from which the light having been inputted from the light input region (110) is outputted. The input region (110) has: a refracting section (120); a reflection fresnel lens section (130), which is positioned outside of the refracting section (120); and a reflecting surface (140), which is positioned outside of the reflection fresnel lens section (130). The reflecting surface (140) reflects, toward the light output region (150), the light which has been inputted to the reflection fresnel lens section (130), and which has not been reflected (the light leaked from the reflection fresnel lens section (130)).

Abstract: In an illuminating device, when exiting lights come out from a lens sheet, the optical paths of the exiting lights are deflected in a direction opposite to an optical axis of a light source by means of a plurality of prisms which are included in a first lens group arranged on an inward side of the lens sheet located adjacent to the optical axis of the light source and each of which has a inclined face facing toward the optical axis of the light source, wherein the exiting lights from the light source via the first lens group of the lens sheet are adapted to mix with exiting lights from the light source via a second lens group located outside the first lens group, whereby the degree of color unevenness is reduced, that appears inherently when a pseudo white LED is used as the light source of the illuminating device.

Abstract: An optical lens including a first light exit surface, a total internal reflection (TIR) surface, a second light exit surface and a third light exit surface connected in an order, and correspondingly has a first intersection, a second intersection and a third intersection therebetween. A first line between the first intersection and a reference point on an optical axis of the optical lens intersects with the optical axis to form a first angle between 30 degrees to 60 degrees, and a first direction of the reference point pointing toward a point on the TIR surface intersects with a normal of the first light exit surface at the point to form a reflecting angle larger than a critical angle of TIR. A second line between the second intersection and the reference point intersects with the first line to form a second angle between 10 degrees to 30 degrees.

Abstract: The present subject matter is directed to a system and method for producing a batwing light distribution. A lens is illuminated with a light source, preferably an LED, and the lens is configured to internally reflect a portion of the illuminating light back in a direction generally opposite to the initial illumination direction. Another portion of the light from the light source may pass through other lens surfaces but may also be reflected back past the light source with a reflector positioned on the other side of the lens from the light source. The light source may be mounted on a frame so as to obscure light therefrom from view.

Abstract: A reflective diffusion lens may include a bottom surface concave toward a reflective surface, a longitudinal cross section of the bottom surface being formed in a parabolic shape or normal distribution shape such that light incident upon the bottom surface is incident upon the reflective surface, and the reflective surface concave toward the bottom surface. The reflective surface may include a concave surface having a longitudinal cross section formed in a parabolic shape or normal distribution shape to totally reflect the light transmitted from the bottom surface and incident upon the reflective surface. A lighting installation may include at least one light source to emit light, a reflective diffusion lens to collect light emitted from the light source, and a reflective plate positioned at a lower portion of the light source and adapted to adjust a direction or amount of light reaching the reflective plate.

Abstract: The invention discloses an optical device and an optical module, the optical device includes a collimation lens arranged on an outer surface for converting incident light from a light source to parallel light, further includes a transmission light total reflection surface for totally reflecting a part of the parallel light at a first angle so that the part of the parallel light is finally coupled to an external optical fiber, a detection light total reflection surface for totally reflecting a part of the parallel light at a second angle so that the part of the parallel light is finally coupled to an external optical detector, and at least one attenuation light reflection surface for totally reflecting parallel light to be attenuated at a third angle before the parallel light leaves the optical device. The invention achieves the light intensity attenuation while realizing the direction-changing transmission of light signals.

Abstract: A laser-sustained plasma illuminator system includes at least one laser light source to provide light. At least one reflector focuses the light from the laser light source at a focal point of the reflector. An enclosure substantially filled with a gas is positioned at or near the focal point of the reflector. The light from the laser light source at least partially sustains a plasma contained in the enclosure. The enclosure has at least one wall with a thickness that is varied to compensate for optical aberrations in the system.

Abstract: A lens cap (3) is arranged to cover a light-emitting surface (23) of a light source (2), the lens thereby guiding light from the light source (2) in oblique directions relative to the light source (2). The lens cap (3) includes, in a planar view, a light transmitting region (33) and a light blocking region (34), the light transmitting region (33) divided into a plurality of light transmitting regions by the light blocking region (34) so that the light from the light source (2) passes through the plurality of light transmitting regions (33) and is separated into beams traveling in different directions.

Abstract: A nonimaging light assembly for flashlights, including a light source and a lens symmetrical about an optical axis for receiving light from the light source and producing therefrom a light beam having concentrated and divergent components resulting in a high intensity core beam surrounded by a smoothly transitioning lower intensity surround beam. In a preferred embodiment utilizing a light emitting diode as the light source, the combined light beam produced by the light assembly has a substantially circular cross section.

Abstract: The present disclosure relates to an optical sheet for controlling the direction of light rays which is used for manufacturing backlight units of TFT-LCDs for computer monitors and televisions, and more specifically to an optical sheet which can uniformly diffuse light, improve brightness, and adjust viewing angle. There is provided an optical sheet for controlling the direction of light rays comprising a substrate film; a microlens group arranged on a first face of the substrate film; and a plurality of protuberances formed on a second face of the substrate film, wherein each protuberance comprises a reflective layer at the bottom thereof, and the plurality of protuberances comprise an aperture formed therebetween, and wherein a unit microlens of the microlens group has a first side and a second side with different radii of curvature from each other with respect to a light emission control part thereof.

Abstract: A light-directing apparatus for predominantly forward distribution of light from a light emitter having an emitter axis. The light-directing apparatus includes a forward-reflective surface entirely within a lens member positioned over the light emitter. The lens member has an outer surface and an inner cavity including an emitter-light-receiving void and a light-reflecting void which is contiguous with the emitter-light-receiving void and is different in configuration than the emitter-light-receiving void. The forward-reflective surface is in the light-reflecting void in position in the path of light emitted rearwardly.

Abstract: A wide-angle LED warning apparatus has a heat sink base, a circuit board, multiple pillars, multiple LED devices and a transparent cover. The circuit board is mounted in the heat sink base. The pillars are formed in the heat sink base and each pillar respectively has an oblique surface, the oblique surfaces facing toward two opposite sides of the heat sink base. The LED devices mounted on a front surface of the circuit board and the oblique surfaces of the pillars. The transparent cover is mounted on the heat sink base. Hence, the LED warning apparatus of the invention can widely emit light due to the LED devices mounted on the oblique surfaces of the pillars to provide enhanced warning effect and security.

Abstract: The invention relates to a lighting apparatus comprising a laser (102) for emitting a first laser beam (103) and a diffractive reflective element (104). The first laser beam (103) is reflected by the diffractive reflective element (104) for generating a second laser beam (105) being the reflected first laser beam, wherein the diffractive reflective element (104) is adapted such that the effective surface area of the second laser beam (105) is larger than the effective surface area of the first laser beam (103). The second laser beam is supposed to be pointed directly or indirectly to the eyes of a person. Since the diffractive reflective element increases the effective surface area and is used in a reflective mode, i.e. the first laser beam will generally not directly meet the eye of the person, if the diffractive reflective element is damaged or displaced, the risk of eye damages can be reduced.

Abstract: A flash lens and a flash module employing the same. The flash lens includes a lens unit including an incident surface, a reflecting surface, and a light-emitting surface; and a lens seating portion disposed at a lower portion of an edge of the light-emitting surface, extending and protruding from the reflecting surface, and including a pattern formed in a lower surface thereof. In addition, the flash module according to an embodiment of the present invention may include the flash lens and a light emitting diode (LED) chip integrally formed with the flash lens.

Abstract: A lens structure, a light source device, and a light source module are provided. The light source device includes a light emitting device and a lens structure. The light emitting device is capable of emitting a light beam. The lens structure includes a first surface, a second surface opposite to the first surface and four total internal reflection surfaces connected to the second surface. Some of the total internal reflection surfaces connect to the first surface. The first surface has a recess. The light emitting device is disposed at the recess. The second surface is a free-form surface. The light beam is capable of entering the lens structure through the first surface, and leaving the lens structure through the second surface.

Abstract: There is provided a light emitting diode (LED) lens for double-sided lighting, including a light diffusion agent diffused therein, the LED lens including a light receiving portion receiving light, a first light transmitting portion corresponding to the light receiving portion and transmitting a portion of the light in an upward direction therefrom, a reflective portion extended from the first light transmitting portion and reflecting a portion of the light, and a second light transmitting portion facing the first light transmitting portion and transmitting the light reflected by the reflective portion in a downward direction therefrom.

Abstract: Lens assemblies for use in remote phosphor lighting systems, and methods of making and using them, are described. The lens assemblies typically include a lens member, a dichroic reflector attached to an outer surface of the lens member, and a phosphor layer attached to an inner surface of the lens member. The dichroic reflector reflects LED light originating from a given source point in a reference plane proximate the inner surface to a given image point in the reference plane. The phosphor layer may be patterned to cover one or more first portions of the inner surface and to expose one or more second portions, and/or the phosphor layer may be removably bonded to the inner surface. The lens assemblies can be readily combined with one or more short wavelength (e.g. blue) LEDs and other components to provide a remote phosphor lighting system.

Abstract: A projection lens includes a rear face through which light emitted from a light source enters, and a front face from which the light is emitted in front of a vehicle in a predetermined light distribution pattern. The projection lens is configured such that, upon entering the projection lens, an incoming wavefront emitted from the light source is internally reflected by a first reflection region of the front face, a first intermediate wavefront generated by the internal reflection by the first reflection region is internally reflected by a second reflection region of the rear face, a second intermediate wavefront generated by the internal reflection by the second reflection region is refracted by a refraction region of the front face, and the refracted wavefront is emitted as an outgoing wavefront. The second reflection region is an optical surface determined based on the first intermediate wavefront and the second intermediate wavefront.

Abstract: A backlight device 12 includes cold cathode tubes 17, a chassis that houses the cold cathode tubes 17 therein and having an opening 14b through which light emitted from the cold cathode tubes exits, and a diffuser plate 15 provided so as to face the cold cathode tubes 17 and cover the opening 14b. A light reflecting portion 30 is formed on a side of the diffuser plate 15 close to the cold cathode tubes 17 so as to have different light reflectance in every surface area of a surface of the diffuser plate 15. A scattering structure 31 is formed on a side of the diffuser plate 15 opposite from the cold cathode tubes 17 and scatters the light.

Abstract: An illumination lens for hemispherically emitting light emitting diodes is disclosed that produces a square illumination pattern too narrow for a refractive lens to produce by itself. The lens is freeform in that it departs from circular symmetry in order to produce a square pattern. It is catadioptric in that it comprises a central refractive lens with a square output of desired angular width and a surrounding TIR prism that produces the same square output, overlapping the first for better uniformity of the sum. The central lens and circumambient TIR prism are joined in a monolithic configuration suitable for injection molding. Vector equations are disclosed for generating the shapes of the five optically active surfaces of the invention, two internal surfaces forming a central cavity surrounding the LED and three external surfaces, all five departing from circular symmetry.

Abstract: A light emitting device (LED) luminous flux converting lens including a bonding portion that bonds the LED luminous flux converting lens to a supporting plate to fix the LED luminous flux converting lens. The LED luminous flux converting lens includes a bonding portion that protrudes from a boundary of an upper surface in a horizontal direction, and the bonding portion includes a first portion and a second portion having different thicknesses. The LED luminous flux converting lens includes a bonding portion that protrudes from a portion of a boundary of the upper surface in a horizontal direction. A luminous flux efficiency of the LED luminous flux converting lens may be increased by reducing loss in a luminous flux due to the bonding portion.

Abstract: Phototherapy systems comprising a therapeutic lamp platform for radiant lamps such as LEDs disposed in an assembly comprising a first wall to which the lamps are affixed thereto and a second wall, closer to the patient, spaced from the first wall wherein the lamps are recessed relative thereto. The second wall comprises a reflective surface facing towards a patient and a plurality of light apertures substantially aligned with the LEDs on the first wall for communicating lamp radiation from the lamps to a user. The lamps and associated circuitry are disposed between the first and second wall so that the reflective surface is relatively smooth and seamless towards the patient. The walls have a malleable rigidity for flexible adjustability relative to the user. The device is mounted to the user with a frame comprising an eyeglass frame or goggles including lenses for shielding the user's eyes from lamp radiation.

Abstract: Disclosed are a display device and an optical member. The display device includes a light source, a wavelength conversion member provided adjacent to the light source, and a reflection-transmission part interposed between the light source and the wavelength conversion member.

Abstract: An optical lens for increasing viewing angle of light from a light emitting diode includes a bottom surface, a reflective surface, and a side surface connected between the bottom surface and the reflective surface. The light emitting diode is received in the bottom surface. The reflective surface defines a cone-shaped recess and is concaved from a top of the optical lens towards the bottom surface. A vertex angle of the cone-shaped recess defined by the reflective surface is less than or equal to 60 degrees.

Abstract: A double reflecting structure may include a first reflecting portion reflecting light that may be emitted from a light source, and a second reflecting portion formed on one side of the first reflecting portion to reflect again the light that may be reflected by the first reflecting portion.

Abstract: An optical lens for adjusting lighting angle of a light emitting diode includes a bottom surface, a light incident surface and a light emitting surface. The light incident surface is formed in a middle portion of the bottom surface. The light incident surface is concaved from the bottom surface and forms a receiving chamber. The light incident surface has an ellipsoidal shape and a major axis of the light incident surface is coincided with an optical axis of the optical lens. The light emitting surface protrudes in a direction away from the bottom surface. The light emitting surface has an ellipsoidal shape and a major axis of the light emitting surface is perpendicular with the optical axis of the optical lens. A lighting device having the optical lens and the light emitting diode is also provided.

Abstract: The collimating optical element includes a light incident surface and a light emission curved surface. The light incident surface receives a light emitted by a light source. The light emission curved surface and a first plane are intersected to form a first curve. The first curve has a plurality of first curve segments, and each first curve segment includes at least three first tangent points. After passing each first tangent point along a connecting line of the light source and each first tangent point, the light exits along a first collimation axis, and an included angle formed between the first collimation axis and an optic axis is greater than ?15° and smaller than ?15°. Thus, the light after passing the collimating optical element forms a one-dimensional collimating light.

Abstract: An adapter lens includes an inner converging lens part; a convex light output region; a front conical light output region; an outer reflector part; a rearwardly open blind hole defining surface including a flat base surface and a frustoconical side surface that together define a light incidence region and a frustoconical hole having an inner end diameter, an outer end diameter, and allowing for longitudinal movement therein of a LED light source along an optical axis of the adapter lens within the frustoconical hole for changing a light cone emitted from the adapter lens. The adapter lens has a height H and a maximum diameter MD, and the ratio of the height H to the maximum diameter MD is greater than 0.5.

Abstract: A lighting assembly that efficiently collects and accurately directs light with a defined asymmetrical light ray angle distribution onto a nearby target surface. The light with the asymmetrical light ray angle distribution illuminates the target surface with a defined illumination profile. In theatrical and architectural lighting, the defined illumination profile is an even illumination profile on a nearly vertical surface. In street lighting, the defined illumination profile is an even illumination profile on a horizontal surface. The lighting assembly includes an LED and a solid reflector optic having a reflective surface shaped to reflect light from the LED in a way that produces the asymmetrical light ray angle distribution at least in part.

Abstract: A vehicular lamp can include a guiding lens having a polygonal outline. The guiding lens can include divided portions around the optical axis with an equal center angle. The divided portions can each have an incidence face, a reflection face that can reflect to an optical axis direction light emitted from a light source and having passed through the incidence face, and a light-exiting face that can allow the light from the reflection face to pass therethrough to be projected in an illumination direction of the vehicular lamp. Each divided portion can have an outer-diameter end of the light-exiting face or reflection face at a position farthest from the optical axis within a plane including the maximum radius portion of the divided portion and the optical axis.

Abstract: A lens comprising: a lens body; a total reflection surface provided on an outer side of the lens body, the reflection surface being in the form of a scalelike polyhedron; a recess formed on a bottom side of the lens body at a central region thereof for accommodating a LED, the recess having a side surface and a central surface; a micro lens array formed at the central surface of the recess; and a light-emitting surface provided at a top side of the lens body; wherein a substantially uniform circular light spot is formed by the lens.

Abstract: An optical system is disclosed that uses an LED light source. The light output is coupled to an optic element formed from a material with a high refractive index. The coupling of the light to the high index material significantly reduces the cone angle of the light. The system is very efficient in that nearly all the light generated by the LED is directed to the intended subject.

Abstract: A nonimaging light assembly for flashlights, including a light source and a lens symmetrical about an optical axis for receiving light from the light source and producing therefrom a light beam having concentrated and divergent components resulting in a high intensity core beam surrounded by a smoothly transitioning lower intensity surround beam. In a preferred embodiment utilizing a light emitting diode as the light source, the combined light beam produced by the light assembly has a substantially circular cross section.

Abstract: A light mixing element in a shape of a prism, and a cylinder of the prism of the light mixing element includes a first light-emitting inclined surface, a second light-emitting inclined surface, a bottom surface, a incident surface and a reflecting inclined surface; one side of the second light-emitting inclined surface is connected with one side of the first light-emitting inclined surface to form a top angle; the bottom surface is arranged opposite to the top angle; the incident surface is connected between one side of the bottom surface and the other side of the first light-emitting inclined surface; and the reflecting inclined surface is connected between the other side of the bottom surface and the other side of the second light-emitting inclined surface and arranged opposite to the incident surface and the first light-emitting inclined surface.

Abstract: A light flux controlling member includes an emission surface, a first incidence surface that is an inner surface of a concave portion, a second incidence surface that is disposed outside an opening rim portion of the concave portion, and a rear surface. A plurality of annular grooves is formed in the second incidence surface. Each annular groove forms an intersection line with an adjacent annular groove. When a virtual plane that passes through the outer rim portion of the second incidence surface and is orthogonal to the central axis is assumed as a reference plane, the plurality of annular grooves is disposed so that the intersection line become close to the virtual plane with distance from the central axis. The shape of a cross section of the annular groove including the central axis is an arc of which the center of curvature is located outside the light flux controlling member.

Abstract: Light directing films employing at least two layers forming a continuous corrugated boundary between major surfaces of the film. Light received by a major surface of the film is internally redirected by interacting with the facets of the corrugated inter-layer boundary and is emitted from the opposing major surface towards a new propagation direction which is different from the original propagation direction by up to 90 degrees. Light directing films may have additional layers and/or layer boundaries which may provide additional bend angles to light rays or otherwise diffuse the emitted beam.

Abstract: An LED lens includes a recess disposed in a quadrangular bottom surface of the LED lens and configured to have a light source disposed therein, wherein an internal surface of the recess, including lateral surfaces and top surfaces, is a light incident surface. The LED lens further includes a top surface forming a light exit surface, having a size greater than that of the bottom surface, and having a quadrangular shape; and lateral surfaces of the LED lens, disposed between the top and bottom surfaces of the LED lens, forming a reflective surface, and guiding light incident to the LED lens through the light incident surface to the light exit surface. The top surfaces of the light incident surface form an inverted quadrangular pyramid.

Abstract: A lighting apparatus is provided that, while suppressing an increase in size, can change the illuminating direction. The lighting apparatus has: a laser generator which emits laser light; a light emitting member which is irradiated with the laser light emitted from the laser generator to emit light; an irradiated position changer which moves and thereafter stops an irradiated position at which the light emitting member is irradiated with the laser light; and a light projecting member which projects the light emitted from the light emitting member.

Abstract: In various embodiments, LED-based illumination devices include an inlet region for receiving the LED light that is complementary in shape to the lens of the LED.

Abstract: A lighting fixture can include a light source, and a lens body including an incident face through which light emitted from the light source enters the lens body, an exit face, and a reflecting face configured to reflect light which has entered the lens body from the incident face such that the reflected light is emitted from the exit face to form a predetermined light distribution pattern having a boundary line between light and dark. The reflecting face can include a first reflecting region configured to reflect light with a reference wavelength which has entered the incident face perpendicularly with respect to the incident face. A second reflecting region can be configured to reflect light with a wavelength longer than the reference wavelength. A third reflecting region can be configured to reflect light with a wavelength shorter than the reference wavelength.

Abstract: A lamp is provided which is suitable for use in low-profile applications. The lamp includes a light source and a lens. The lens includes a first surface opposite a second surface, where the second surface includes an injection surface and the first surface includes a multi-faceted optical element converging towards the injection surface. The light source injects light into the lens via the injection surface and the light refracts through the first surface while total internally reflecting off the first surface and the second surface toward the periphery of the lens.

Abstract: An illumination system includes at least an LED module, and at least an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface intersecting with the first light emitting surface and being on same side with the first light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. Although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface, light emitted from the first light emitting surface can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system 100 have uniform illumination pattern.

Abstract: An illumination system includes an LED module and an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface intersecting with the first light emitting surface and being on same side with the first light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. Although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface, light emitted from the first light emitting surface can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system has a uniform illumination pattern.

Abstract: An illumination lens includes a light receiving surface 101; and a light exit surface 103. When the axis of 101 is designated as Z-axis, a position of the bottom of the lens is designated as z=0 and X-axis and Y-axis are defined in a plane which contains z=0 and is perpendicular to Z-axis, 101 is symmetric about YZ-plane and XZ-plane and a cross-sectional area of a cross section of 101 parallel to XY-plane monotonously decreases with increase in z-coordinate. When the maximum value of z-coordinate on 101 is designated as d and a radius of the cross section of 103 at z=0 is designated as r, a point (x, y) on a cross section of 101 at z=0.3 d is represented by ( x a ) 2 + ( y b ) 2 = f ? ( ? ) ? ? 0 ? ? ? ? 2 ( 1 ) where a and b represent constants and ? = tan - 1 ? ( y x ) ? ? f ? ( 0 ) = f ? ( ? 2 ) = 1.0 , ? and ? ? f ? ( ? ) ? 1.

Abstract: A condensing element includes an outer section having a circumferential curved sidewall extending between a light input surface at one end and a light output surface at the other end that provides substantially total internal reflection of light emitted from the input surface and incident upon the sidewall of the outer section. A circumferential curved inner section is recessed within the outer section such that the light emitted from the input surface and incident upon the curved inner section is not incident upon the output surface. A circumferential substantially non-curved sidewall extends from the inner section to a circumferential substantially non-curved upper section positioned at approximately a 45° angle relative to the optical axis of the light emitted from the input surface. A light-absorbing plug is in communication with the upper section, wherein the light emitted from the input surface is condensed and directed in a sideways direction relative to the optical axis of the entering light.

Abstract: A U-turn lens for a recessed light fixture comprising a tubular, transparent, internally reflective, hollow cylindrical lens having a closed top including a hot mirror receiving focused light from a reflector lamp, an inside diameter extending to an open lower end where focused light is emitted and collimated light is received through the lens outside the inside diameter to an angular reflector reflecting the collimated light transversely to illuminate a concave decorative shade.

Abstract: An adapter lens includes an inner converging lens part; a convex light output region; a front conical light output region; an outer reflector part; a rearwardly open blind hole defining surface including a flat base surface and a frustoconical side surface that together define a light incidence region and a frustoconical hole having an inner end diameter, an outer end diameter, and allowing for longitudinal movement therein of a LED light source along an optical axis of the adapter lens within the frustoconical hole for changing a light cone emitted from the adapter lens. The adapter lens has a height H and a maximum diameter MD, and the ratio of the height H to the maximum diameter MD is greater than 0.5.

Abstract: In one aspect, an optical lens assembly (herein referred to also as an optic) is provided that comprises a plurality of lenses (or lens segments) adapted to receive light from a light source, each of said lenses (or lens segments) having an input surface and an output surface and a lateral surface extending between the input and output surfaces. The lenses are arranged relative to one another and positioned relative to the light source such that each of the lenses receives at its input surface a different portion of light emitted by the source, e.g., each lens receives at its input surface light emitted by the source into an angular subtense (solid angle) different than an angular subtense associated with another lens. Each lens (or lens segment) guides at least a portion of the received light to its output surface via reflection, e.g., via total internal reflection (TIR).