JP2017083796A - Light distribution control lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new lens technique for not only satisfying a prescribed value of a road surface luminance but also further increasing lamp fitting intervals, and in addition capable of uniformly illuminating a roadside, a sidewalk, and a tunnel wall surface.SOLUTION: A light distribution control lens 1 comprises, assuming a Y-axis extending from a light source 5 virtual origin 0, an X-axis passing through the virtual origin 0 and perpendicular to the Y-axis, and a Z-axis passing through the virtual origin 0 and perpendicular to the Y-axis and the X-axis: a one-side inclination convex lens surface part 20 including a lens bottom face 3 and a lens irradiation surface 2 of a lens body 10, the lens irradiation surface 2 arranged at one side on the X-axis from the virtual origin 0, inclining light irradiation L to the one side of the X-axis; the other-side inclination convex lens surface part 21 arranged at the other side of the X-axis from the virtual origin 0, and inclining the light irradiation L to the other side of the X-axis; a one-side concave lens surface part 22 arranged at one side on the Z-axis from the virtual origin 0, and inclining the light irradiation L to the one side on the Z-axis; and the other-side concave lens surface part 23 arranged at the other side on the Z-axis from the virtual origin 0, and inclining the light irradiation L to the one side on the Z-axis.SELECTED DRAWING: Figure 4

Description

    The present invention relates to a lens technology that can guide and irradiate illumination light to a desired range, and in particular, an illumination target such as a road or a tunnel where a substantially constant width continues in a certain direction is more efficient. In addition to the field of manufacturing and providing lenses that can control light distribution so that they can be illuminated more uniformly and homogeneously, the field of providing and selling equipment and instruments necessary for their transportation, storage, assembly and installation To the materials required for these materials, machinery and equipment, such as wood, stone, various fibers, plastics, various metal materials, etc., electronic components incorporated in them, and control related integration In general, the fields of equipment, various measuring instruments, the equipment, the power machinery that moves the equipment, the electric power that is the energy and the electric and oil fields that are the energy sources. Fields collectively referred to as machinery, as well as testing and researching those facilities and equipment, fields related to their display, sales, import and export, generals, results of their use, and equipment to build them , Technologies that are not related to the fields related to the collection and transportation of garbage debris generated by the operation of instruments, the recycling field that efficiently recycles these garbage debris, and new fields that cannot be envisaged at this time There is no field.

(Points of interest)
The LED lighting fixtures for tunnel lighting, for example, have a multi-chip, COB (Chip On Board) type LED light source surface which is generally flat, and has a higher directivity than a conventional fluorescent lamp, and illuminates a limited range. Due to the nature of light concentration, a plurality of LEDs must be arranged vertically and horizontally at appropriate intervals, and the mounting angle of each LED module must be individually adjusted so that it can be illuminated widely and uniformly as a whole. LED lighting according to various usage conditions such as basic lighting of the tunnel, entrance lighting, exit lighting, lighting of special structures, lighting of connection roads, lighting for power failure, etc. If the number and individual mounting angle are not adjusted appropriately, there is a disadvantage that it is impossible to obtain efficient and safe road surface luminance and luminance uniformity over the entire tunnel. It was.

(Conventional technology)
As a technique for overcoming such drawbacks, as shown in the following Patent Document 1 (1), which has already been developed by the applicant of the present application, the center of the light source surface of the LED is the virtual origin, and the virtual axis Y line perpendicular to the virtual origin , Set a virtual X-ray and a virtual Z-line that are orthogonal to the virtual axis Y line at the virtual origin and are also orthogonal to each other, match the center to the virtual axis Y-line, and make the virtual YZ plane a symmetric boundary plane, A concave incident double surface that can be diffused by directing the light beam from the light source surface in both positive and negative infinity directions from the virtual origin on the virtual Y-X plane is provided, and the concave incident double surface is the lens thickness On the opposite side of the opposite side, the center coincides with the virtual axis Y line, the virtual YZ plane is the symmetric boundary plane, and the light flux from the light source plane is positive or negative infinity from the virtual origin on the virtual YX plane. A bi-directional, diffusive and convergent convex output double surface is provided for more accurate alignment. Realizing the control, the lamp housing is smaller and lighter, more economical to manufacture, can be installed, there is and efficient maintenance of realization can those with the light distribution control lens for LED.

    In addition, a light source device, such as that shown in Patent Document 1 (2), installs a light emitting element on the bottom of a recess in a holder, covers the light exit window with a lens, and transmits light using the light emitting element as a light source through the lens. The light is distributed to the irradiated object, and the lens has a concave surface at the central incident portion of the light source side lens surface, and a concave surface at the output portion of the central portion of the irradiated object side lens surface and its Convex-shaped continuous surfaces at the light emitting portions in the peripheral portion are provided in axial symmetry, and | r1 | <D / 2, | r1 | <| r2 |, and D <CA1 <D × 1. 5 (D is the maximum diameter of the light exit window, r1 is the radius of curvature at the center of the concave surface of the light source side lens surface, r2 is the radius of curvature at the center of the concave surface of the irradiated object side lens surface, CA1 is the light source side lens The effective aperture diameter of the concave surface of the surface), control the light distribution, and as the radiation angle increases To compensate for light from a light source pair intensity becomes weak, a light source device capable of irradiating with a substantially uniform illuminance surface to be irradiated, and the like which provides a luminaire technology using the same.

    The light distribution control lens for LED as shown in the former patent document 1 (1) is a light beam from the light source surface that irradiates from the virtual origin to the virtual axis Y-line infinite direction in both virtual X-ray infinite directions. Tilt to form a V-shape, can ensure a long irradiation range in the virtual X-ray direction, and can irradiate homogeneous light in a width range shorter than the virtual X-ray direction in both infinite directions of the virtual Z-ray Therefore, it has a substantially constant width, such as roads and tunnels, and is suitable for lighting facilities that are elongated in a certain direction. For example, in the case of tunnel lighting, it is not limited to the road width. It is necessary to illuminate from the road shoulder to the wall of the tunnel where the lighting fixtures are installed. In order to illuminate from the road surface to the wall surface, it is only necessary to change and adjust the support angle of the light source surface and light distribution control lens. Wall brightness ratio and glare To meet the i value standard there was a weakness that becomes difficult.

Further, the light distribution control lens as shown in the latter patent document 1 (2) can set the true circular illumination range wider and more homogeneously. However, when it is installed on a road or a tunnel, for example. In order to uniformly illuminate a road surface that has a substantially constant width and is elongated in a certain direction, it is necessary to set the installation span in the road traveling direction to be equal to or narrower than the road width, and more Many lamp fixtures had to be secured, and it was not economical.
(1) Japanese Unexamined Patent Application Publication No. 2015-118132 (2) Japanese Unexamined Patent Application Publication No. 2010-15898

(Awareness of problems)
As described above, the various light distribution control lenses that have been proposed in the past have been intended to enable illumination over a wider area more uniformly. It is difficult to set a wider illumination range in the traveling direction of the vehicle, and it is difficult to uniformly illuminate the shoulders, sidewalks, and tunnel walls to ensure brightness suitable for road driving, walking on the sidewalks, etc. Shorten the installation span, adjust the installation angle and orientation of the lamp, its light source, and light distribution lens so that it can illuminate the tunnel wall as well as the width of the road, exclusive lighting for tunnel walls and sidewalks The applicant has been engaged in the research, development, production and maintenance management of tunnel lighting fixtures for many years because it is not economical, such as the need to install additional lighting. Has completed LED lighting tunnel lighting fixtures and has been providing them in a wide variety of areas, but based on various detections obtained from them, information from users, etc., it can only meet the specified value of road surface brightness. First of all, while extending the installation span further, enabling more uniform lighting over a wide range of road shoulders, sidewalks, and walls, and reducing the number of lamps per section, it has become possible to feel the possibility of further improvement It is.

(Object of invention)
Therefore, the present invention not only satisfies the specified value of the road surface brightness, but can further extend the lamp installation interval, and not only the width of the road but also more uniformly illuminating the road shoulder, sidewalk, and tunnel wall surface. Judging whether it is possible to develop a new lens technology, we quickly started developing and researching it, and as a result of repeating trial and error over a long period of time and many prototypes and experiments, this time we finally have a new structure. The present invention succeeds in realizing the light control lens, and hereinafter, the configuration thereof will be described in detail together with an embodiment representative of the present invention shown in the drawings.

(Structure of the invention)
As will be clearly understood from the embodiments representing the present invention shown in the drawings, the light distribution control lens of the present invention basically comprises the following configuration.
That is, assuming the Y axis extending in the vertical direction from the light source virtual origin, the X axis passing through the light source virtual origin and orthogonal to the Y axis, and the Z axis passing through the light source virtual origin and orthogonal to the Y axis and the X axis, the light source of the lens body A lens bottom surface facing the lens, and a lens irradiation surface sandwiching the lens main body thick portion from the lens bottom surface, opposite to the light source, and the lens irradiation surface is arranged on one side of the light source virtual origin on the X axis A light source on the Z-axis having a one-convex convex lens surface part that inclines light irradiation to one side of the X-axis, and a second inclined-convex lens surface part that is arranged on the other side from the X-axis light source virtual origin and inclines light irradiation to the other side of the X-axis. Arranged on one side from the virtual origin, one side concave lens surface part that tilts light irradiation to one side on the Z axis, and arranged on the other side from the virtual origin on the Z axis light source, and light irradiation on one side on the Z axis A structure with a concave lens surface on the other side to be tilted. Which is a light distribution control lens to subject matter.

    If the light distribution control lens having this basic configuration is expressed in a different manner, the Y axis extending in the vertical direction from the light source virtual origin, the X axis passing through the light source virtual origin and orthogonal to the Y axis, and the light source virtual origin are shown. Assuming the Z axis orthogonal to the Y axis and the X axis, the lens bottom surface facing the light source virtual light source, and the lens irradiation surface that sandwiches the lens body thick part from the lens bottom surface and is opposite to the light source virtual light source And the lens irradiation surface is arranged on one side from the X-axis light source virtual origin, and the one-side inclined convex lens surface portion that inclines the light irradiation on one side of the X-axis by 20 ° to 85 ° from the Y-axis, and the X-axis light source The other side of the X-axis is 180.degree. Inverted from one of the X-axes, and the other is an inclined convex lens surface portion tilted by 20.degree. To 85.degree. From the Y-axis. Arranged on one side and Z One side concave lens surface part that is inclined to one side on the axis, and another side concave lens surface part that is arranged on the other side from the light source virtual origin on the Z axis and tilts light irradiation to one side on the Z axis, and one and the other convex convex lens The surface portion equally V-divides and guides a part of the light source irradiation light irradiated in the Y-axis infinite direction so that the angle between the light source virtual origin on the X-axis is 40 °> 170 °, and one The light distribution control is configured such that the side and other concave lens surface parts can be directed and guided so that the other part of the light source irradiation light that irradiates in the Y-axis infinite direction is tilted to one side with respect to the Z-axis light source virtual origin. Become a lens.

    More specifically, assuming a Y axis extending vertically from the light source virtual origin, an X axis passing through the light source virtual origin and orthogonal to the Y axis, and a Z axis passing through the light source virtual origin and orthogonal to the Y axis and the X axis, A lens bottom surface facing the light source of the lens body, and a lens irradiation surface sandwiching the lens body thick part from the lens bottom surface, opposite to the light source, and the lens irradiation surface from the light source virtual origin on the X axis One side of the X axis is tilted by 20 ° to 85 ° from the Y axis, and one inclined convex lens surface portion is tilted from the light source virtual origin on the X axis to the other side. On the other side of the X axis reversed by 180 °, the other inclined convex lens surface portion tilted by 20 ° to 85 ° from the Y axis is disposed on one side from the light source virtual origin on the Z axis, and the light irradiation is tilted to one side on the Z axis. One side concave lens surface, and virtual light source on Z axis Provided on the other side from the origin and provided with a concave lens surface on the other side that tilts the light irradiation to one side on the Z-axis, the lens bottom surface is in the lens bottom illumination light incident range facing the light source, and the X-axis light source virtual Located on one side of the origin, branched and condensed toward the inclined convex lens surface part, and the one guiding central lens surface part, and the lens bottom illumination light incident range facing the light source, than the X-axis light source virtual origin Z-axis is located on the other side and has the other guiding central lens surface portion that branches and condenses toward the other inclined convex lens surface portion, and is in the range from the lens bottom illumination light incident range surrounding the light source to the outer periphery of the lens irradiation surface. Place the upper light source virtual origin on one side and the other side, and direct the illumination light that refracts around the lens bottom illumination light incidence range to the lens irradiation surface from the illumination light incident from one or the other guiding central lens surface Reflection / guidance The light distribution control lens having the structure that was made by providing an end-the other side concave wall thickness in the reflecting surface portion that.

    In other words, the illumination light irradiation vertical component direction extending in the vertical direction from the virtual origin at the center of the light source emission surface is the Y axis, the illumination distance extending direction passing through the light source virtual origin and orthogonal to the Y axis is the X axis, and the light source virtual origin is Assuming that the illumination width direction perpendicular to the Y-axis and the X-axis is the Z-axis, the lens bottom facing the light-emitting surface of the lens body, and the lens body thick part from the lens bottom, opposite to the light-emitting surface A lens irradiation surface that becomes a gap, and the lens irradiation surface is disposed on one side of the illumination distance extension direction X axis across the light source virtual origin, and the illumination light irradiation direction is set on one side of the illumination distance extension direction X axis Y One inclined convex lens surface inclined by 20 ° to 85 ° from the axis and the other on the illumination distance extension direction X axis across the light source virtual origin, and the illumination light irradiation direction is 180 with one of the illumination distance extension directions X axis ° Inverted X And the other inclined convex lens surface portion inclined at 20 ° to 85 ° from the Y-axis in the other direction, and arranged on either side of the light source virtual origin on the illumination width direction Z-axis, and the illumination light irradiation direction is set to the illumination width direction Z One side concave lens surface inclined to any one side on the axis, and arranged on either side from the light source virtual origin on the illumination width direction Z axis, and the illumination light irradiation direction is any one on the illumination width direction Z axis A concave lens surface portion on the other side inclined to the side, and the lens bottom surface is in the lens bottom surface illumination light incident range facing the light source light emitting surface, and is disposed on one side of the light source virtual origin on the X axis of the illumination distance extension direction, One guiding central lens surface that branches and condenses toward the inclined convex lens surface, and the lens bottom illumination light incident range facing the light source light emitting surface, and the other side of the light source virtual origin on the X axis in the illumination distance extension direction To the other side of the inclined convex lens A light source imaginary on the Z axis in the illumination width direction in the range from the periphery of the lens bottom illumination light incident range facing the light source and the light emitting surface to the outer periphery of the lens illumination surface, with the other guiding central lens surface portion for branching and condensing Reflecting and guiding the illumination light that refracts around the lens bottom illumination light incidence range from the illumination light incident on one side and the other side across the origin and incident from one or the other guide central lens surface Thus, the light distribution control lens having a configuration in which the one-side / other-side concave-shaped inner reflection surface portion is provided.

    As described above, according to the light distribution control lens of the present invention, unlike the conventional one, the X-axis direction orthogonal to the Y-axis extending in the vertical direction from the light source virtual origin has a unique configuration as described above. In the Z-axis direction passing through the light source virtual origin and perpendicular to the Y axis and the X axis, the uniform illumination light can reach the wider range of the light source from the light source virtual origin on the same Z axis. The illumination light arranged in the X-axis direction can be tilted to the side and can be illuminated with high brightness precisely in the desired width range. The distance between the lamps can be greatly extended, the number of installed lighting lamps can be greatly reduced, the economy can be improved, and uniform and high-brightness illumination in the desired range in the Z-axis direction can be realized. Can be so constant Incorporated into lighting fixtures for roads and tunnels that last long in the direction, it can be designed not only to meet the specified value of road surface brightness, but also to meet the wall brightness ratio and the glare Ti value standard, The installation interval can be greatly extended, the number of lamps installed in each road section can be reduced, and sufficient safety can be achieved while ensuring sufficient safety. As a result, it is possible to illuminate the walkway and tunnel walls more uniformly.

    In addition, the lens irradiation surface is arranged on one side from the X-axis light source virtual origin, and the light-illuminated virtual origin surface is inclined on one side of the X-axis and tilted by 20 ° to 85 ° from the Y-axis on the X-axis. Since the other inclined X-axis lens surface is inclined 20 ° to 85 ° with respect to the Y-axis on the other side of the X-axis that is 180 ° inverted from one of the X-axis. However, a part of the light source irradiation light irradiated in the Y-axis infinite direction is equally V-branched and guided so that the sandwich angle is 40 °> 170 ° between both sides of the virtual origin on the X-axis. Since it is possible to illuminate more uniformly and more efficiently in a wider area in the axial direction, the lamp installation span in the X-axis direction is greatly expanded, and lighting of facilities that are long in one direction such as roads and tunnels is possible. Be much more efficient It is possible.

    Furthermore, it is arranged on one side from the Z-axis light source virtual origin, and is arranged on the other side from the Z-axis light source virtual origin, and the one-side concave lens surface part that tilts the light irradiation to one side on the Z-axis, and the light irradiation is Z Since the other-side concave lens surface portion that is inclined to one side on the axis is provided, the other-side concave lens surface portion irradiates the other part of the light source irradiation light that irradiates in the Y-axis infinite direction from the Z-axis light source virtual origin. Is designed to meet not only the specified value of road surface brightness but also the wall surface brightness ratio and glare Ti value standard, and within the desired range in the Z-axis direction that is the illumination width direction. Realize accurate and uniform illumination, for example, without adjusting the installation posture angle of the lens body, the illumination light is tilted in the road width direction (Z-axis direction), and it is stable and homogeneous even on tunnel walls and sidewalks Light can reach.

    The lens bottom surface is in the lens bottom surface illumination light incident range facing the light source light emitting surface, and is placed on one side of the light source virtual origin on the X-axis of the illumination distance extension direction, and branches and converges toward the inclined convex lens surface part. On the other hand, it is located on the other side of the light source virtual origin on the X-axis of the illumination distance extending direction in the lens bottom surface illumination light incident range facing the light source light emitting surface and branching toward the other inclined convex lens surface portion The one having the other guiding central lens surface portion that condenses can efficiently refract and uniformly collect the irradiation light irradiated by the light source emitting surface on one and the other inclined convex lens surface portions of the lens irradiation surface, respectively. Illumination light that is directed to the Y-axis infinity direction, which is the vertical direction of illumination light illumination, can be branched into a V-shape with the virtual light source as the origin on the Y-axis-X-axis plane, and the illumination distance extension direction so That tilted both infinity of X-axis, and induced to homogeneously dispersed, shall one and the other inclined convex surface portion efficiently reach the respective, and which further realizes the illumination of high luminance.

    In addition, it is a range from the periphery of the lens bottom surface illumination light incident range facing the light source emission surface to the outer periphery of the lens irradiation surface, and is provided on one side and the other side across the light source virtual origin on the illumination width direction Z axis. The side and other concave concave internal reflection surfaces are lenses that refract the illumination light that refracts around the lens bottom illumination light incidence range from among the illumination light incident from one or the other guide center lens surface of the lens bottom illumination light incidence range. Since the light is reflected / guided toward the irradiation surface, uniform and high-luminance illumination can be realized in a desired range in the illumination width direction Z-axis direction.

    The bottom surface of the lens is outside the range facing the light source and is one place that does not interfere with illumination light irradiation, or multiple places that are appropriately selected so as not to interfere with illumination light irradiation, or illumination light irradiation If the support legs are installed at any one of the balanced locations that do not interfere, the mounting base of the light source and the light distribution control lens There is no need to provide it, and the number of manufacturing and assembling steps can be greatly reduced, and assembly can be performed more efficiently and accurately.

    The outer peripheral wall contour shape of the lens irradiation surface is gradually reduced in a stepped manner toward the infinity direction of the Y axis, and the Frennel shape distributes the illumination light more uniformly, increases the illumination brightness, and reduces the glare. Therefore, it is possible to realize lighting that is more comfortable and has excellent visibility, and is particularly suitable for lighting lamps such as roads and tunnels where traffic safety is important.

    When the lens irradiation surface and the lens bottom surface are symmetrical with respect to the Y-axis-Z-axis plane, illumination in the desired width range in the X-axis direction that is the illumination distance extension direction and the illumination width direction Z-axis direction Since the light has the same range and the same brightness in both infinite directions in the same X-axis direction with the light source virtual origin as the boundary, the same number of lighting lamps are set to have wider lighting lamp intervals. When arranged in the X-axis direction, the illumination brightness in the illumination range in the X-axis direction can be maintained uniformly, and the number of lighting fixtures can be greatly reduced, and a uniform and sufficient illumination brightness is achieved. Can be possible.

In implementing the present invention having the above-described configuration, the best or desirable mode will be described.
The light source emits light upon receiving power supply, illuminates the light distribution control lens of the present invention with illumination light, and is capable of illuminating a desired range with a desired luminance under the light distribution control by the light distribution control lens. For example, a mercury lamp, a sodium lamp, a fluorescent lamp, a metal hydride lamp, a sodium lamp, a halogen lamp, a xenon lamp, a HID lamp (High Intensity Discharge Lamp), and an LED (Light Emitting Diode). It can be used as a lamp or other illumination light source, and can also be a multi-chip, COB / LED (chip on board / Light Emitting Diode), as shown in the examples described later.

    The light source virtual origin can be referred to as a light source virtual origin set at the center of the light emission range of the light source, and is responsible for a function serving as a three-dimensional guide for the shape and arrangement of each optical part in the light distribution control lens of the present invention. Specifically, the Y axis indicating the illumination light irradiation vertical component direction, the X axis indicating the illumination distance extending direction (for example, the road traveling direction), and the Z axis indicating the illumination width direction (for example, the road width direction) cross each other. In addition to being able to be the light emission center position of various lamps, as shown in the examples described later, it is assumed that the light emission surface center position of the multichip, COB / LED is virtually set can do.

    The Y axis has a function of virtually indicating the illumination light irradiation vertical component direction, selected from various types, and the light source selected as the object of light distribution control diffuses light emitted from the light source emission point in a diffuse manner. In particular, for example, when a lamp is used as a light source, for example, power is supplied from the center position of a light emitting portion such as a filament of the lamp. It can be said that the part (base, substrate, etc.) is an imaginary straight line extending in the center of the illumination direction opposite to the side, and as shown in the examples to be described later, the center position of the light emitting surface of the multichip, COB / LED A virtual straight line extending vertically from the light source virtual origin to the illumination direction from the light emitting surface of the multichip and the COB / LED.

    The X axis has a function of showing a virtual straight line extending in one direction perpendicular to the Y axis when the light distribution control lens of the present invention is combined with a light source. More specifically, the X axis of the present invention The light control lens indicates a linear direction in which light distribution control is to be performed so that illumination light from the light source can reach farther. As shown also in an embodiment described later, the light distribution control lens is provided in the tunnel. It can be said that it is a virtual straight line that indicates the direction in which the road travels and the direction in which the illumination distance should be extended.

    The Z-axis has a function of showing a virtual straight line extending in a direction perpendicular to the Y-axis and the X-axis at the light source virtual origin which is the light source emission point when the light distribution control lens of the present invention is combined with the light source. More specifically, the light distribution control lens of the present invention indicates a linear direction in which light distribution control is performed so that illumination light from a light source can be irradiated more uniformly toward a desired width range. As shown in the examples described later, when an illumination lamp incorporating the light distribution control lens is installed in the tunnel, it is a virtual straight line indicating the road width direction and orthogonal to the X axis indicating the road traveling direction. It can be assumed as a straight line.

    The lens body is the main body of the light distribution control lens of the present invention, and can be incorporated into an illumination lamp, etc., and has the function of guiding light emitted from the light source with refraction and reflection to enable desired light distribution control. The opposite side of the lens body is the opposite side of the lens body, and the opposite side of the lens body is the opposite side of the lens body. The inclined convex lens surface part, the other inclined convex lens surface part, the one side concave lens surface part, and the other side concave lens surface part must be provided. More specifically, as shown in the examples described later, Desirably, one guiding central lens surface portion and the other guiding central lens surface portion are provided in the facing illumination light incident range, and one side and the other concave concave thickness reflection surface portion are provided around the illumination light incident range. Furthermore, in other words, a glass lens body such as a quartz lens or a fluorite lens, a synthetic glass lens body, or an organic glass or plastic lens body such as PMMA (polymethyl methacrylate resin) or polycarbonate is used. And can be appropriately coated.

    The lens bottom illumination light incident range has a function of allowing light emitted from the light source to enter the thick portion of the lens body and refracting and guiding it in a desired direction, and has one guiding central lens surface portion and the other guiding central lens surface portion. One guiding central lens surface part has a function of refracting a part of the light emitted from the light source so as to be branched toward the lens irradiation surface one inclined convex lens surface part, and the other guiding central lens surface part is The other part of the light emitted from the light source is refracted so as to be branched toward the other side of the lens irradiation surface and the inclined convex lens surface.

    The lens bottom one side and the other side concave-shaped internal reflection surface can reflect and guide the illumination light that is incident from the lens bottom illumination light incidence range and refracts around the lens bottom illumination light incidence range toward the lens irradiation surface. The angle of the one-side / other-side concave inner reflection surface portion is ensured with a high reflectivity with respect to the light irradiated to the one-side / other-side concave inner reflection surface portion. It is desirable to have a possible shape and posture, and a reflective film having a high reflectance can be provided.

    The lens irradiation surface, one inclined convex lens surface portion, passes through the lens main body thick portion through the lens irradiation surface, and the infinity direction of the Y axis that is the illumination light irradiation vertical component direction, or the positive and negative infinity direction of the X axis that is the illumination distance extension direction. It has a function to refract and guide the light radiated to the outside toward the light source so that it can be tilted in one direction of the X axis, which is the illumination distance extension direction, with the light source virtual origin as the boundary. More specifically, it can be condensed and uniformly diffused in a desired direction. More specifically, it is arranged on one side of the light source virtual origin on the X-axis of the lens irradiation surface, and the light irradiation is X It should have a shape that can be refracted, condensed and diffused so that it tilts 20 ° to 85 ° from the Y-axis in one infinite direction of the axis, and the light source irradiation light that irradiates in the Y-axis infinite direction together with the inclined convex lens surface portion. Part of X-axis light source It is desirable to be able to equally V-branch and guide so that the angle between 40 ° and 170 ° is sandwiched between both sides of the virtual origin, and the angle between the irradiated light on both the one and other inclined convex lens surfaces is less than 40 ° In this case, the illumination distance expandability in the X-axis direction is impaired, and the illumination range is narrowed. In the case where the sandwich angle exceeds 170 °, the illumination in the Y-axis infinite direction is performed. There is a possibility that the light luminance is remarkably lowered, resulting in the disadvantage that efficient and homogeneous illumination cannot be realized.

    The lens irradiation surface, the other inclined convex lens surface part, passes through the lens body thick part through the lens irradiation surface, and the infinity direction of the Y axis that is the illumination light irradiation vertical component direction, or the positive and negative infinity direction of the X axis that is the illumination distance extension direction. It has a function that can refract and guide the light radiated to the outside so as to be inclined toward the other of the X axis, which is the illumination distance extension direction, with the light source virtual origin as the boundary, and shines with high efficiency. More specifically, it can be condensed and uniformly diffused in a desired direction. More specifically, from the virtual origin of the light source on the X axis of the lens irradiation surface, one inclined convex lens surface portion is 180 ° It should be placed on the other side of the inverted X-axis so that it can be refracted, condensed and diffused so that the light irradiation is inclined 20 ° to 85 ° from the Y-axis in the other infinite direction of the X-axis.

    The lens illumination surface one side concave lens surface part and the other side concave lens surface part pass through the lens main body thick part through the lens illumination surface, and the illumination light irradiation vertical component direction is the infinity direction of the Y axis or the illumination distance extending direction X axis. It has a function to refract and guide the illumination light to be directed in the positive and negative infinity direction of the Z axis, which is the orthogonal illumination width direction, so as to incline toward any one of the positive and negative directions of the Z axis. In addition, it must be capable of transmitting light with high efficiency, condensing and uniformly diffusing in a desired direction, and more specifically, as shown in the examples described later, It is arranged on either side of the light source virtual origin on the illumination width direction Z-axis, and the illumination light irradiation direction is inclined to any one side on the illumination width direction Z-axis. Either from the virtual light source origin on the axis Placed on the side, it should be assumed that tilting the illumination light direction to any one side of the illumination width direction Z-axis.

    The lens bottom illumination light incident range has a function that allows the irradiation light emitted from the light source to be incident on the lens body of the light distribution control lens of the present invention with high efficiency and a desired incident angle so as to face the light source. In addition to being able to be installed in a plane that is perpendicular to the Y axis that is the illumination light irradiation vertical component direction, it can be infinite on the Y axis that is the illumination light irradiation vertical component direction. It is possible to use a concave shape that is recessed in the far direction, or a convex shape that protrudes toward the light source virtual origin on the Y-axis that is the illumination light irradiation vertical component direction. As shown in the embodiment, the lens bottom surface illumination light incidence range facing the light source emission surface is arranged on one side of the light source virtual origin on the X axis of the illumination distance extension direction, and toward the inclined convex lens surface part. Branching and condensing while guiding The lens surface and the other of the lens bottom surface illumination light incident range facing the light source light emitting surface, the other being arranged on the other side from the virtual origin on the X axis of the illumination distance extending direction, and branching / condensing toward the other inclined convex lens surface portion It is good to consist of a guidance center lens surface part.

    The one guiding central lens surface portion of the illumination light incident range is directed toward the one inclined convex lens surface portion with the illumination light incident on one of the ranges from the light source virtual origin on the X-axis of the illumination distance extension direction of the lens bottom surface illumination light incident range. It has a function of allowing branching and condensing, and can be a flat surface with an angular orientation that intersects the optical axis of one inclined convex lens surface part, or a concave surface that is recessed toward one inclined convex lens surface part, or As shown also in the Example mentioned later, it can be set as the thing of any one of the convex surface shape which protrudes toward a light source.

    The other guiding central lens surface part of the illumination light incident range is directed toward the other inclined convex lens surface part with the illumination light incident on the other side of the light source virtual origin on the X-axis of the illumination distance extension direction of the lens bottom illumination light incident range. In addition to being able to be branched / condensable, it can have a planar shape with an angular orientation that intersects the optical axis of the other inclined convex lens surface portion, or a concave shape that is recessed toward the other inclined convex lens surface portion, or described later As shown also in the embodiment to which it does, it can be set as the thing of any one shape of the convex surface shape which protrudes toward a light source.

    The lens bottom surface one side and the other side concave-shaped inner reflection surface part passes through the lens body thick part, and the illumination light that irradiates the area from the periphery of the lens bottom illumination light incident range to the outer periphery of the lens irradiation surface. The lens bottom illumination light incident range and the lens bottom illumination light incident range and the lens illumination surface have an appropriate incident angle and an appropriate reflection angle with respect to the lens irradiation surface. In addition to being able to have a flat shape that faces both of the lens irradiation surface, it has a concave shape (convex shape toward the wall thickness) that is recessed so that the center approaches both the lens bottom illumination light incident range and the lens irradiation surface. It is possible to provide a reflective coating that can achieve a higher reflectance toward the inner side of the wall thickness, and as shown in the embodiments of the present invention, the lens bottom illumination Light incident range And it can be made of meat Atsunai concave shape that is protruded toward both meat Atsugai lens irradiation surface.

    The bottom surface of the lens is outside the range facing the light source and is one place that does not interfere with illumination light irradiation, or a plurality of locations that are appropriately selected so as not to interfere with illumination light irradiation, or the illumination light irradiation Supporting leg portions may be provided at any one of a plurality of balanced positions that do not hinder, and the supporting leg portions are accurately positioned with respect to a fixed object such as a lamp housing or a substrate. The lens body, which has a function to make sure that it can be attached, is manufactured as a separate part from the lens body, and can be attached or detached so that it can be attached or detached. And can be provided as mounting holes and grooves for attaching screws and rivets, brackets such as a part of the clamp mechanism, etc. As shown Amount may be capable finely adjusting the mounting position provided long groove.

Furthermore, as shown in the examples described later, the lens irradiation surface is assumed to have a Frennel shape in which the outer peripheral wall contour shape is gradually reduced in a stepwise manner toward the Y axis infinite direction. The lens irradiation surface and the lens bottom surface can have a plane-symmetric shape with the Y-axis-Z-axis plane as a symmetry plane, and one inclined convex lens surface portion and the other inclined convex lens of the lens irradiation surface. The boundary portion of the surface portion, the concave lens surface portion on one side and the concave lens surface portion on the other side can be a valley-shaped boundary portion, but in order to obtain uniform illumination, as much as possible not to clarify the boundary line It is desirable that it be continuous with a smooth curved surface. For example, the boundary between each other consists of a plurality of frennel-shaped grooves and ridges, or an optical coating capable of diffusing illumination light is provided. Or a thing, it is possible to, such as those having a glassy diffusion processing unit worn.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

The drawings show some typical embodiments embodying the technical idea of the light distribution control lens of the present invention.
It is a front view which shows a light distribution control lens. It is a side view which shows a light distribution control lens. It is a top view which shows a light distribution control lens. It is a perspective view which shows a light distribution control lens. It is a perspective view which shows the bottom face shape of a light distribution control lens with a broken line. It is a front view which cuts and shows the light distribution control lens. It is a side view which cuts and shows the light distribution control lens. It is a front view which shows the light distribution control lens mounted in the mount base part. It is a front view which shows the illumination light which passes a light distribution control lens. It is a normalized far field distribution sectional view showing the light distribution performance analysis result of the light distribution control lens in the Y axis-X axis direction. It is a side view which shows the illumination light which passes a light distribution control lens. It is a normalized far field distribution sectional view showing the light distribution performance analysis result of the light distribution control lens in the Y-axis-Z direction.

    The example shown in FIGS. 1 to 9 and FIG. 11 includes a Y-axis extending vertically from the light source 5 virtual origin 0, an X-axis passing through the light source 5 virtual origin 0 and orthogonal to the Y-axis, and a Y-axis passing through the light source 5 virtual origin 0. Assuming the Z axis orthogonal to the X axis, the lens bottom surface 3 facing the light source 5 of the lens body 10, and a lens that sandwiches the lens body thick portion 10 from the lens bottom surface 3 and is opposite to the light source 5 An illumination surface 2, the lens illumination surface 2 is arranged on one side from the virtual origin 0 on the X-axis light source 5, a one-side inclined convex lens surface portion 20 that tilts the light irradiation L to one side of the X-axis, and an X-axis light source 5 is arranged on the other side from the virtual origin 0, and has the other inclined convex lens surface portion 21 for inclining the light irradiation L to the other side of the X axis, and is arranged on one side from the virtual light source 0 on the Z-axis on the Z axis. One side concave lens surface part 22 tilted to one side above and on the Z axis A typical implementation of the light distribution control lens of the present invention, which is provided on the other side of the source 5 virtual origin 0 and provided with the other-side concave lens surface portion 23 for tilting the light irradiation L to one side on the Z axis. An example is given.

    As can be clearly seen from these drawings, the light distribution control lens 1 of this embodiment is for a tunnel illumination lamp, and as shown in FIG. 8, the LED light source 5 is mounted in a lamp housing. A multi-chip, COB / LED, in which a substrate 51 for an LED light source 5 is fitted in a predetermined position of the base portion 6 and the LED light source 5 has a light emitting surface 50 in the center of the surface of the substrate 51 for the LED light source 5 (Chip on board / Light Emitting Diode) 5 is incorporated, and a reflective sheet 52 is attached to the surface of the multi-chip, the substrate 51 for the LED light source 5 around the COB / LED 5 and the mount base 6, A virtual origin 0 is set at the center of the light emitting surface 50 of the LED light source 5 which is a multi-chip, COB / LED 5, and lead is generated from the virtual origin 0. The illumination light irradiation vertical component direction extending in the direction is the Y axis, the road traveling direction as the illumination distance extending direction passing through the light source 5 virtual origin 0 and orthogonal to the Y axis is the X axis, and the light source 5 virtual origin 0 is passed through the Y axis and the X axis. When the road width direction as the illumination width direction orthogonal to the Z-axis (shown in FIGS. 2 to 5 and 7) is assumed, the lens bottom surface 3 facing the LED light source 5 light emitting surface 50 of the lens body 10, and the lens It is assumed that the lens main body thick portion 10 is sandwiched from the bottom surface 3 and has a lens irradiation surface 2 opposite to the light emitting surface 50 of the LED light source 5.

    As shown in FIG. 1 to FIG. 9 and FIG. 11, the lens irradiation surface 2 is arranged on one side of the road traveling direction X axis across the light source 5 virtual origin 0, and the illumination light irradiation direction is the road traveling direction X axis. Road traveling direction X across one inclined convex lens surface portion 20 tilted by 30 ° to 60 ° optical axis within a range of 20 ° to 85 ° from the Y axis of illumination light irradiation vertical component direction, and light source 5 virtual origin 0 Arranged on the other side of the axis, the illumination light irradiation direction is in the range of 20 ° to 85 ° from the Y axis of the illumination light irradiation vertical component direction in the other direction of the X axis, which is 180 ° reversed from one of the road traveling direction X axis. The light source 5 on the road width direction Z-axis is arranged on one side of the road width direction Z-axis, and the illumination light irradiation direction is set to the road width direction Z. One-side concave lens that tilts the optical axis to either side of the axis The other side concave lens which is arranged on either side from the virtual origin 0 of the light source 5 on the road width direction Z-axis and tilts the illumination light irradiation direction to any one side on the road width direction Z-axis. A surface portion 23 is provided, and the boundary portions of the one inclined convex lens surface portion 20, the other inclined convex lens surface portion 21, the one side concave lens surface portion 22 and the other side concave lens surface portion 23 are connected by a smoothly continuous curved surface. It is as.

    As shown in FIGS. 5 to 8, the lens bottom surface 3 is located in the lens bottom surface 3 illumination light incident range 30 facing the light emitting surface 50 of the LED light source 5 and from the light source 5 virtual origin 0 on the road traveling direction X axis. Are arranged on one side, branched to and focused toward the inclined convex lens surface portion 20, and the one guiding central lens surface portion 31 and the lens bottom surface 3 facing the light emitting surface 50 of the LED light source 5 and the illumination light incident range 30 on the road. The light source 5 on the traveling direction X-axis has the other guiding central lens surface portion 32 that is arranged on the other side of the virtual origin 0 and branches and condenses toward the other inclined convex lens surface portion 21, and is shown in FIGS. 2, 7, and 11. As described above, the light source 5 on the Z axis in the illumination width direction in the range from the periphery of the lens bottom surface 3 illumination light incident range 30 facing the LED light source 5 light emitting surface 50 to the outer peripheral edge of the lens illumination surface 2 is sandwiched. Side and The illumination light L, which is arranged on the other side and is refracted around the lens bottom surface 3 illumination light incident range 30 among the illumination light L incident from the one or other guiding central lens surface portions 31 and 32, is reflected toward the lens irradiation surface 3. The one-side / other-side concave-shaped internal reflection surface portion 33 to be guided is provided, and the lens irradiation surface 2 and the lens bottom surface 3 of the light distribution control lens 1 have a Y-axis-Z-axis plane as a symmetry plane. It is assumed that the surface is symmetrical.

    As shown in FIGS. 1 to 7, 9, and 11, the lens bottom surface 3 is outside the illumination light incident range 30 range facing the light source 5 and the virtual light source 5, and the illumination light irradiation L is hindered. Block-like support leg portions that are U-shaped fixed adjustment screw grooves 40 in a plan view at both ends at both locations where the road travel direction X axis is in the positive / negative infinity balance. In addition, the lens irradiation surface 2 has a Frennel shape in which the outer peripheral wall contour shape is gradually reduced in a stepped manner toward the Y axis infinite direction.

(Operation / Effect of Example 1)
As shown in FIGS. 6, 8, 9 and 10, the light distribution control lens 1 of the present invention having the configuration as described above is configured such that the irradiation light L emitted from the light emitting surface 50 of the light source 5 is Y-axis (illumination). The lens main body (lens main body thick portion) 10 from the one guiding central lens surface portion 31 and the other guiding central lens surface portion 32 on the lens bottom surface 3 illumination light incident range 30 on the X-axis (road traveling direction) plane. The one guide central lens surface portion 31 is incident and guides a part of the irradiation light L passing through the one guide center lens surface portion 31 toward the one inclined convex lens surface portion 20 so as to be refracted / condensed and uniformly diffused, while the other The guiding central lens surface portion 32 guides a part of the irradiation light L passing through the other guiding central lens surface portion 32 toward the other inclined convex lens surface portion 21 to be refracted / condensed and homogeneously diffused, and The obliquely inclined convex lens surface portions 20 and 21 irradiate the irradiation light L emitted from one and the other inclined convex lens surface portions 20 and 21 in both infinite directions of the road traveling direction X axis with the illumination light irradiation vertical component direction Y axis as a boundary. In other words, the irradiation light L guided by one and the other inclined convex lens surface portions 20 and 21 is refracted / condensed and uniformly diffused within an angle range of 60 ° to 60 °. -Refraction / condensation and homogeneous diffusion in the range of 60 ° to 120 ° with the angle between 40 °> 170 ° with the virtual origin O as the base point on the X-axis (road traveling direction) plane It is guided in a V-branch shape, and the reachable range of the illumination light in the road traveling direction X-axis can be greatly expanded, and it can be illuminated uniformly.

    As shown in FIGS. 2, 6 to 8, 11, and 12, the irradiation light L emitted from the light source 5 emitting surface 50 is a Y-axis (illumination light irradiation vertical component direction) -Z-axis (road width direction) plane. In the illumination light L that passes through the one and the other guide central lens surface portions 31 and 32 and is refracted around the illumination light incident range 30 of the lens bottom 3, the illumination scattered to one side from the virtual origin O of the road width direction Z-axis The light L is substantially totally reflected by the one-side concave thick reflection surface portion 33, passes through the lens main body thick portion 10, and reaches the lens irradiation surface 2 by being condensed and uniformly diffused. In addition, in the illumination light L that passes through one and the other guide central lens surface portions 31 and 32 and is refracted around the illumination light incident range 30 of the lens bottom surface 3, it is scattered to the other side from the virtual origin O of the road width direction Z-axis. The illuminating light L is reflected on the other side of the concave reflection surface 33 is substantially totally reflected, passes through the lens body thick portion 10, reaches the lens irradiation surface 2 while being condensed and uniformly diffused, and the amount of irradiation light L leaking from the lens bottom surface 3 is reduced. It will greatly reduce and realize more efficient and high brightness illumination.

    Further, as shown in FIGS. 2, 6 to 8, 11, and 12, the irradiation light L emitted from the light source 5 emitting surface 50 is Y-axis (illumination light irradiation vertical component direction) -Z-axis (road width). Direction surface) from the lens bottom surface 3 illumination light incident range 30 from the one guiding central lens surface portion 31, the other guiding central lens surface portion 32 and the one-side / other-side concave-thick inner reflection surface portions 33, 33. ) The other part of the irradiation light L that passes through 10 and enters the lens irradiation surface 2 on one side and the other-side concave lens surface portions 22 and 23 is irradiated with the illumination light irradiation vertical component direction Y-axis infinite direction. Is directed and guided so that most of the luminous flux L is tilted toward one side by 10 ° from the virtual origin of the light source on the Z axis, so that illumination in the Z direction of the road width direction is required. Homogeneous and narrow enough for road width The illumination of high luminance, and which can be more economically realized.

    Then, as shown in FIGS. 1 to 12, the outer peripheral wall contour shape of the lens irradiation surface 2 is made to be a Frennel type that gradually reduces in a stepwise manner toward the light irradiation vertical component direction Y-axis infinite direction. Further, the illumination light L emitted from the lens irradiation surface 2 is condensed in a desired range and is uniformly diffused to sufficiently satisfy the specified value of the road surface luminance, and also to satisfy the glare Ti value standard.

(Conclusion)
As described above, the light distribution control lens of the present invention makes it possible to achieve the intended purpose uniformly by its novel configuration, and is easy to manufacture, which is much larger than the conventional control lens technology. Wide-span installation can improve lighting efficiency, greatly reduce the number of lighting lamps per fixed range, make it much cheaper, make it much more economical, install man-hours per fixed lighting range, and Since the maintenance man-hours can be greatly improved, the lighting industry and the construction industry, which had previously had to secure the required brightness by increasing the number of lighting fixtures, are more important than the road lighting and tunnel lighting. It is highly appreciated by road managers who want to reduce the number of installation, maintenance, and management work, and is expected to be widely used and spread.

0 Light source virtual origin (virtual origin)
L irradiation light Y Y axis (illumination light irradiation vertical component direction)
X X axis (lighting distance extension direction: road traveling direction)
Z Z axis (lighting width direction; road width direction)
1 Light distribution control lens
10 Same lens body (lens body thick part)
2 Lens irradiation surface
20 Same inclined convex lens surface
21 Same as above, Convex convex lens surface
22 Same concave lens surface
23 Same side concave lens surface 3 Lens bottom
30 Same illumination light incident range
31 Same guiding center lens surface
32 On the other hand, guide center lens surface
33 Same-side / other-side concave-shaped inner reflection surface 4 Support leg
40 Same groove for fixing screw 5 Light source (LED light source: multichip, COB / LED)
50 Same light emitting surface
51 Same board
52 Same reflection sheet 6 Mount base (lamp housing)

Claims (7)

    Assuming the Y axis extending vertically from the light source virtual origin, the X axis passing through the light source virtual origin and orthogonal to the Y axis, and the Z axis passing through the light source virtual origin and orthogonal to the Y axis and the X axis, confront the light source of the lens body. The lens bottom surface, and a lens irradiation surface that sandwiches the lens main body thick portion from the lens bottom surface and is opposite to the light source. One inclined convex lens surface portion that inclines the irradiation to one side of the X axis, and the other inclined convex lens surface portion that is arranged on the other side from the X axis light source virtual origin and tilts the light irradiation to the other of the X axis, and the Z axis light source virtual origin One side concave lens surface part that is arranged on one side and tilts light irradiation to one side on the Z axis, and other side that is arranged on the other side from the light source virtual origin on the Z axis and light irradiation is tilted to one side on the Z axis A side concave lens surface is provided. Light distribution control lens to.     Assuming a Y-axis extending vertically from the light source virtual origin, an X axis passing through the light source virtual origin and orthogonal to the Y axis, and a Z axis passing through the light source virtual origin and orthogonal to the Y axis and the X axis, confront the light source virtual light source. The lens bottom surface and the lens main body thick part from the lens bottom surface are sandwiched and have a lens irradiation surface opposite to the light source virtual light source, and the lens irradiation surface is arranged on one side from the light source virtual origin on the X axis, X is obtained by irradiating light on one side of the X axis by 20 ° to 85 ° from the Y axis on one inclined convex lens surface and on the other side from the light source virtual origin on the X axis, and inverting the light irradiation by 180 ° from one side of the X axis. One side concave lens surface part which has the other inclined convex lens surface part inclined at 20 ° to 85 ° from the Y axis on the other side of the axis, is arranged on one side from the light source virtual origin on the Z axis, and inclines light irradiation to one side on the Z axis, And the other side from the virtual origin of the light source on the Z axis The other side concave lens surface part that inclines light irradiation to one side on the Z axis is provided, and one and the other inclined convex lens surface part irradiates part of the light source irradiation light that irradiates in the Y axis infinite direction. Both sides of the origin are equally V-branched and guided so as to have an angle of 40 °> 170 °, and the other side of the concave lens surface on one side and the other side irradiates the other part of the light source irradiation light irradiated in the Y axis infinite direction. A light distribution control lens characterized by being capable of being directed and guided so as to be tilted to one side from the virtual origin of the light source on the Z axis.     Assuming the Y axis extending vertically from the light source virtual origin, the X axis passing through the light source virtual origin and orthogonal to the Y axis, and the Z axis passing through the light source virtual origin and orthogonal to the Y axis and the X axis, confront the light source of the lens body. The lens bottom surface, and a lens irradiation surface that sandwiches the lens main body thick portion from the lens bottom surface and is opposite to the light source. One inclined convex lens surface portion that inclines the irradiation to one of the X axes, and the other inclined convex lens surface portion that is arranged on the other side from the light source virtual origin on the X axis and inclines the light irradiation to the other of the X axes that is 180 ° reversed from one of the X axes And is arranged on one side of the Z-axis light source virtual origin, and is arranged on the other side of the Z-axis light source virtual origin, and on the other side of the Z-axis light source virtual origin. The other side concave lens surface part which inclines to one side on the Z axis A one-way guiding central lens that has a lens bottom surface in the lens bottom illumination light incident range facing the light source and is arranged on one side of the X-axis light source virtual origin and branches and condenses toward the inclined convex lens surface portion And a lens bottom surface illumination light incident range facing the light source, the other side of the X-axis light source virtual origin, and the other guiding central lens surface portion branching and condensing toward the other inclined convex lens surface portion In the range from the lens bottom illumination light incident area surrounding the light source to the outer periphery of the lens irradiation surface, the virtual origin on the Z axis is placed on one side and the other side, and incident from one or the other guide central lens surface The one-side / other-side concave inner reflection surface part that reflects and guides the illumination light refracted around the lens bottom illumination light incident range among the illuminated illumination light is provided. Features A light distribution control lens.     The illumination light irradiation vertical component direction extending in the vertical direction from the virtual origin at the center of the light source emission surface is the Y axis, the illumination distance extending direction passing through the light source virtual origin and orthogonal to the Y axis is X axis, the light source virtual origin is passed through the Y axis and X Assuming that the illumination width direction orthogonal to the axis is the Z axis, the lens bottom surface facing the light source light emitting surface of the lens body, and the lens body thick part sandwiched from the lens bottom surface, the lens opposite the light source light emitting surface One inclined convex lens surface portion having an irradiation surface, the lens irradiation surface being arranged on one side of the illumination distance extension direction X axis across the light source virtual origin, and the illumination light irradiation direction being inclined to one of the illumination distance extension directions X axis , And the other inclination of the illumination light irradiation direction on the other side of the X axis that is 180 ° reversed from the one of the illumination distance extension direction X axis, arranged on the other side on the X axis of the illumination distance extension direction across the light source virtual origin Has convex lens surface And a one-side concave lens surface portion that is arranged on either side of the light source virtual origin on the illumination width direction Z-axis and tilts the illumination light irradiation direction to any one side on the illumination width direction Z-axis, and illumination width direction Provided on the other side of the light source virtual origin on the Z-axis, and provided with an other-side concave lens surface portion that tilts the illumination light irradiation direction to any one side on the illumination width direction Z-axis, and the lens bottom surface on the light-emitting surface One guiding central lens surface portion that is in one side of the light source virtual origin on the X-axis of the illumination distance in the lens bottom surface illumination light incident range facing, and branches and condenses toward one inclined convex lens surface portion, and The other guiding central lens surface portion that is located on the other side of the light source virtual origin on the X-axis of the illumination distance in the lens bottom surface illumination light incident range facing the light source emitting surface, and branches and condenses toward the other inclined convex lens surface portion With light source, light emitting surface Is located in one side and the other side across the light source virtual origin on the Z-axis of the illumination width direction in the range from the periphery of the lens bottom illumination light incident range facing the lens to the outer periphery of the lens illumination surface, and one or the other guide center lens Among the illumination light incident from the surface part, one side and the other side concave-shaped internal reflection surface part that reflects and guides the illumination light refracted around the lens bottom illumination light incident range toward the lens irradiation surface A light distribution control lens.     The bottom surface of the lens is outside the range facing the light source and is one place that does not interfere with illumination light irradiation, or multiple places that are appropriately selected so as not to interfere with illumination light irradiation, or illumination light irradiation The light distribution control lens according to any one of claims 1 to 4, wherein a support leg portion is provided at any one of a plurality of balanced positions that do not interfere.     The light distribution control lens according to any one of claims 1 to 5, wherein the lens irradiation surface has a Frennel shape in which an outer peripheral wall contour shape is gradually reduced in a stepped manner toward the Y axis infinite direction.     The light distribution control lens according to any one of claims 1 to 6, wherein the lens irradiation surface and the lens bottom surface have a plane-symmetric shape with a Y-axis-Z-axis plane as a plane of symmetry.

Images