Light control member and luminaire

Abstract

To provide a light control member capable of suppressing reduction in efficiency of light.SOLUTION: Light from a light source of the lighting fixture or light reflected by a reflective member of the lighting fixture passes through the louver. The louver includes a first main body portion, a first incident portion, and a first emitting portion. The first main body has a tubular shape. The first incident portion is located on one end side of the first main body portion and has a first incident opening on which light is incident. The first emission portion is positioned on the other end side of the first main body portion and has a first emission opening from which incident light is emitted. The first main body includes a first inner peripheral surface and a first outer peripheral surface. The first inner peripheral surface is an inner surface in the radial direction. The first outer peripheral surface is an outer surface in the radial direction. Of the first inner peripheral surface and the first outer peripheral surface, at least the first inner peripheral surface is a reflective surface that reflects light.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a light control member and a lighting device. [Background technology]

[0002] The lighting fixture described in Patent Document 1 includes a lamp body and a light control member. The lamp body includes a light exit opening and a light source. The light control member is detachably attached to the light exit opening. The light control member is a glare-cut louver. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-29147 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the louvers of the lighting fixture described in Patent Document 1 can suppress glare. However, attaching a light control member such as a louver to a lighting fixture attenuates light in the light control member, reducing the light extraction efficiency of the lighting fixture. For this reason, there is a demand for a light control member that can suppress the reduction in light efficiency even when a light control member is attached to a lighting fixture.

[0005] The present invention has been made in view of the above-mentioned problems, and has an object to provide a light control member and a lighting device that can suppress a decrease in light efficiency. [Means for solving the problem]

[0006] According to one aspect of the present invention, a light control member allows light from a light source of a lighting device or light reflected by a reflecting member of the lighting device to pass through. The light control member includes a first main body portion, a first incident portion, and a first exit portion. The first main body portion has a cylindrical shape. The first incident portion is located at one end of the first main body portion and has a first incident opening through which the light enters. The first exit portion is located at the other end of the first main body portion and has a first exit opening through which the incident light exits. The first main body portion includes a first inner circumferential surface and a first outer circumferential surface. The first inner circumferential surface is a radially inner surface. The first outer circumferential surface is a radially outer surface. Of the first inner circumferential surface and the first outer circumferential surface, at least the first inner circumferential surface is a reflective surface that reflects light.

[0007] According to another aspect of the present invention, the reflectance of the first inner circumferential surface is greater than the reflectance of the first outer circumferential surface.

[0008] According to another aspect of the present invention, the first inner circumferential surface is preferably a mirror surface, and the first outer circumferential surface is preferably light-absorbing.

[0009] According to another aspect of the present invention, the light control member preferably further includes a second main body portion, a second incident portion, and a second exit portion. The second main body portion is preferably located radially outward of the first main body portion and surrounds at least a portion of the first main body portion. The second incident portion is preferably located at one end of the second main body portion and has a second incident opening through which the light enters. The second exit portion is preferably located at the other end of the second main body portion and has a second exit opening through which the incident light exits. The second main body portion preferably includes a second inner circumferential surface and a second outer circumferential surface. The second inner circumferential surface is preferably a radially inner surface facing the first outer circumferential surface. The second outer circumferential surface is preferably a radially outer surface that can face the reflecting member. Of the second inner circumferential surface and the second outer circumferential surface, at least the second inner circumferential surface is preferably a reflective surface.

[0010] According to another aspect of the present invention, the reflectance of the second inner circumferential surface is preferably greater than the reflectance of the second outer circumferential surface.

[0011] According to another aspect of the present invention, an opening area of ​​the first entrance opening is preferably smaller than an opening area of ​​the first exit opening, and the first inner circumferential surface preferably extends from an edge of the first entrance opening toward an edge of the first exit opening in a cross-sectional view.

[0012] According to another aspect of the present invention, the first main body portion preferably has a linear or curved shape in a cross-sectional view.

[0013] According to another aspect of the present invention, a light control member allows light from a light source of a lighting device or light reflected by a reflecting member of the lighting device to pass through. The light control member includes a first main body portion, a first incident portion, and a first exit portion. The first main body portion has a cylindrical shape. The first incident portion is located at one end of the first main body portion and has a first incident opening through which the light enters. The first exit portion is located at the other end of the first main body portion and has a first exit opening through which the incident light exits. The first main body portion includes a first inner circumferential surface on the inside in the radial direction. The opening area of ​​the first incident opening is smaller than the opening area of ​​the first exit opening. The first inner circumferential surface extends from an edge of the first incident opening to an edge of the first exit opening in a cross-sectional view.

[0014] According to another aspect of the present invention, the first main body portion preferably has a linear or curved shape in a cross-sectional view.

[0015] According to another aspect of the present invention, the device preferably further includes a connecting portion connecting the first body portion and the second body portion. In a cross-sectional view, the first body portion and the second body portion are preferably inclined with respect to the connecting portion. The angle of the first body portion relative to the connecting portion is preferably larger than the angle of the second body portion relative to the connecting portion.

[0016] According to another aspect of the present invention, it is preferable that the first main body portion further includes a first outer peripheral surface on an outer side in a radial direction, and that at least the first inner peripheral surface of the first inner peripheral surface and the first outer peripheral surface is a reflective surface that reflects light.

[0017] According to another aspect of the present invention, the reflectance of the first inner circumferential surface is preferably greater than the reflectance of the first outer circumferential surface.

[0018] According to another aspect of the present invention, the first inner circumferential surface is preferably a mirror surface, and the first outer circumferential surface is preferably light-absorbing.

[0019] According to another aspect of the present invention, a lighting device includes a light source, a reflecting member, and the light control member. The light source emits light, and the reflecting member reflects the light.

[0020] According to another aspect of the present invention, a lighting device includes a light source, a reflecting member, and the light control member. The light source emits light. The reflecting member reflects the light. [Effects of the Invention]

[0021] According to the light control member and lighting fixture of the present invention, it is possible to prevent the light efficiency from being excessively reduced. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a perspective view showing a lighting fixture according to an embodiment of the present invention. [Figure 2] 2 shows a cross section of the lighting fixture shown in FIG. 1 taken along line II-II. [Figure 3] FIG. 2 is a view of the lighting device of the present embodiment as seen from the irradiation surface side. [Figure 4] FIG. 2 is a diagram showing a louver of the lighting fixture of the present embodiment. [Figure 5] 3A and 3B are diagrams illustrating a light source unit, a reflecting member, and a louver of the lighting fixture according to the embodiment. [Figure 6]1A and 1B are diagrams illustrating a light irradiation pattern when the lighting device according to the present embodiment illuminates an irradiation surface. [Figure 7] 10 is a graph schematically showing the relationship between the position where the light irradiation pattern is formed and the illuminance. [Figure 8] FIG. 10 is a diagram showing a louver of a lighting fixture according to a comparative example. [Figure 9] 10A and 10B are diagrams illustrating a light irradiation pattern when a lighting device according to a comparative example illuminates an irradiation surface. [Figure 10] 10 is a graph schematically showing the relationship between the position where the light irradiation pattern is formed and the illuminance in the comparative example. [Figure 11] FIG. 10 is a diagram schematically illustrating a lighting fixture according to a first modification. [Figure 12] 10 is a diagram schematically illustrating a light irradiation pattern when a lighting device according to Modification 1 illuminates an irradiation surface. FIG. [Figure 13] 10 is a graph schematically showing the relationship between the position where the light irradiation pattern of the lighting device according to the first modification is formed and the illuminance. [Figure 14] FIG. 10 is a diagram schematically illustrating a lighting fixture according to a second modification. [Figure 15] 10 is a diagram schematically illustrating a light irradiation pattern when a lighting device according to Modification 2 illuminates an irradiation surface. FIG. [Figure 16] 10 is a graph schematically showing the relationship between the position where the light irradiation pattern of a lighting device according to Modification 2 is formed and the illuminance. [Figure 17] FIG. 10 is a diagram schematically illustrating a lighting fixture according to a third modification. [Figure 18] 10 is a diagram schematically illustrating a light irradiation pattern when a lighting device according to Modification 3 illuminates an irradiation surface. FIG. [Figure 19] 10 is a graph schematically showing the relationship between the position where the light irradiation pattern of a lighting device according to Modification 3 is formed and the illuminance. [Figure 20] FIG. 10 is a diagram schematically illustrating a lighting fixture according to a fourth modification. [Figure 21] 10 is a schematic diagram showing a plurality of light beams emitted from a light source of a lighting fixture according to a fourth modification. [Figure 22]10 is a diagram schematically illustrating a light irradiation pattern when a lighting device according to Modification 4 illuminates an irradiation surface. FIG. [Figure 23] FIG. 10 is a diagram schematically illustrating a lighting fixture according to a fifth modification. [Figure 24] 13A and 13B are schematic diagrams illustrating a plurality of light beams emitted from a light source of a lighting fixture according to a fifth modification. [Figure 25] 10 is a graph schematically showing the relationship between the position where the light irradiation pattern is formed and the illuminance. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments. Note that duplicated explanations may be omitted as appropriate. In addition, the same or equivalent parts in the drawings will be designated by the same reference numerals, and explanations will not be repeated.

[0024] First, a lighting fixture 100 according to this embodiment will be described with reference to FIG. 1. FIG. 1 is a perspective view showing lighting fixture 100 according to this embodiment. Lighting fixture 100 according to this embodiment is attached to a wall surface (not shown). The wall surface may be, for example, a ceiling, a side wall, or a floor. Lighting fixture 100 may be attached by embedding lighting fixture 100 in the wall surface, or by attaching lighting fixture 100 to the wall surface via a mounting member. Lighting fixture 100 may be placed indoors or outdoors.

[0025] As shown in Fig. 1, the lighting fixture 100 includes a lighting fixture body 1, a support part 2, a mounting member 3, and a power supply part (not shown). The lighting fixture body 1 has a heat sink 6. The support part 2 has a fixed frame 4 and a rotating frame 5. The rotating frame 5 has a light leakage control part 51.

[0026] The lighting fixture main body 1 emits light L. The support part 2 supports the lighting fixture main body 1. In this embodiment, the support part 2 supports the lighting fixture main body 1 so that it can rotate and tilt freely. More specifically, the fixed frame 4 supports the rotating frame 5 so that it can rotate freely, and the rotating frame 5 supports the lighting fixture main body 1 so that it can tilt freely.

[0027] Specifically, the fixed frame 4 and the rotating frame 5 are annular or approximately annular. The fixed frame 4 supports the rotating frame 5 so that the fixed frame 4 and the rotating frame 5 can rotate freely in the circumferential direction. Here, the fact that the fixed frame 4 is approximately annular means that the fixed frame 4 is partially interrupted in the circumferential direction. Similarly, the fact that the rotating frame 5 is approximately annular means that the rotating frame 5 is partially interrupted in the circumferential direction.

[0028] The light leakage prevention section 51 of the rotating frame 5 is a section of the rotating frame 5 whose width (dimension) in the vertical direction is larger than that of other sections of the lighting fixture body 1. The other sections are sections other than the light leakage prevention section 51. The vertical direction indicates, for example, the direction from the heat sink 6 toward the rotating frame 5. In the lighting fixture 100 of this embodiment, the fixed frame 4 rotatably supports the rotating frame 5, and the rotating frame 5 supports the lighting fixture body 1 so that it can tilt, but this is not limited to this. The lighting fixture 100 of this embodiment may be configured without the rotating frame 5, and it is not necessary for the rotating frame 5 to be rotatable or for the lighting fixture body 1 to be tiltable.

[0029] The light leakage prevention portion 51 prevents light L from leaking from between the lamp body 1 and the rotating frame 5 when the lamp body 1 is tilted. Specifically, the light leakage prevention portion 51 covers the gap between the lamp body 1 and the rotating frame 5 when the lamp body 1 is tilted. Alternatively, the light leakage prevention portion 51 reduces the gap that occurs between the lamp body 1 and the rotating frame 5 when the lamp body 1 is tilted. According to this embodiment, since the rotating frame 5 has the light leakage prevention portion 51, light L is less likely to leak into the ceiling when the lamp body 1 is tilted. Therefore, even when the lamp body 1 is tilted, the luminous efficiency of the lighting device 100 is less likely to decrease.

[0030] The mounting member 3 mounts the lighting fixture main body 1 at a mounting position. Specifically, the mounting member 3 is fixed to the support part 2, and mounts the support part 2 at the mounting position. By mounting the support part 2 at the mounting position, the lighting fixture main body 1 can be mounted at the mounting position. In this embodiment, the mounting position is, for example, a ceiling (not shown).

[0031] Specifically, the mounting member 3 is a long, plate-like member, the base end of which is fixed to the fixing frame 4 by a screw B1. When the lighting fixture 100 is not attached to a ceiling (not shown), the mounting member 3 protrudes from the fixing frame 4 radially outward from the fixing frame 4. The tip of the mounting member 3 is freely bendable in a direction approaching the lighting fixture body 1. When the lighting fixture 100 is attached to a ceiling (not shown), the mounting member 3 is bent and generates a biasing force radially outward. This biasing force attaches the lighting fixture 100 to the ceiling (not shown). The mounting member 3 is, for example, a leaf spring. Note that the mounting member 3 may also be a wire spring.

[0032] The lighting fixture 100 of this embodiment includes two mounting members 3. In this embodiment, the two mounting members 3 are arranged at equal intervals along the circumferential direction of the fixing frame 4. By arranging the two mounting members 3 at equal intervals, the lighting fixture 100 can be attached to a ceiling (not shown) in a stable position. The number of mounting members 3 is not particularly limited as long as there is a plurality of them. Furthermore, the positions at which the mounting members 3 are arranged are not particularly limited, and the intervals between the plurality of mounting members 3 do not have to be equal.

[0033] The heat sink 6 dissipates heat from the lamp body 1. The heat sink 6 includes a material with high thermal conductivity. For example, the heat sink 6 is made of metal. Specifically, the heat sink 6 may be made of aluminum or an aluminum alloy.

[0034] The heat sink 6 has a plurality of heat sink fins 61. Each of the plurality of heat sink fins 61 dissipates heat. Each of the plurality of heat sink fins 61 is plate-shaped. By having the plurality of heat sink fins 61, the specific surface area of ​​the heat sink 6 increases, and the heat dissipation performance of the heat sink 6 improves.

[0035] Next, the heat sink 6 will be described with reference to Fig. 2. Fig. 2 shows a cross section taken along II-II of the lighting fixture 100 shown in Fig. 1. The cross section of the lighting fixture 100 shown in Fig. 2 is a cross section taken along the irradiation direction L.

[0036] The heat sink 6 has a case 62. In this embodiment, the case 62 is cylindrical. Specifically, the case 62 is open on the light emission side, from which the light L is emitted. The case 62 also has a ceiling 621 on the side opposite to the light emission side.

[0037] Continuing, the lighting fixture body 1 will be further described with reference to Fig. 2. As shown in Fig. 2, the lighting fixture body 1 further includes a light source unit 7 and a reflecting member 8. The light source unit 7 emits light. The light source unit 7 is fixed to the case portion 62 of the heat sink 6. More specifically, the light source unit 7 is fixed to the inner circumferential surface of the ceiling portion 621 of the case portion 62. Therefore, the light source unit 7 is disposed inside the case portion 62.

[0038] The light source unit 7 includes a light source module 71 and a socket unit 72. The socket unit 72 holds the light source module 71. The socket unit 72 is an electric component that forms a contact point for connecting the light source module 71 to an electric circuit.

[0039] The light source module 71 includes a light source 711 and a substrate 712. The light source module 71 is mounted on the mounting surface of the substrate 712. For example, the light source 711 includes a plurality of light-emitting elements. The light-emitting elements are LED (Light Emitting Diode) arrays. For example, the light-emitting elements are of a COB (Chip on Board) type formed by sealing a plurality of LEDs with a phosphor. The light source 711 includes a light emission surface. Note that the light-emitting elements may be of an SMD (Surface Mount Device) type in which an LED and a phosphor are integrated into one unit to form an LED chip, and the plurality of LED chips are mounted on the mounting surface of the substrate 712 and electrically connected to the conductive pattern of the substrate 712.

[0040] The reflecting member 8 reflects the light L emitted from the light source unit 7. The reflecting member 8, for example, totally reflects the light L emitted from the light source unit 7. The reflecting member 8 prevents the light L emitted from the light source unit 7 from returning toward the light source unit 7. The reflecting member 8 is supported by the case portion 62 of the heat sink 6. The reflecting member 8 is cylindrical. The diameter of the reflecting member 8 gradually increases with increasing distance from the light source unit 7. For example, the reflecting member 8 is approximately cone-shaped. Alternatively, the reflecting member 8 may be approximately truncated cone-shaped. It is preferable that the inner circumferential surface 81 of the reflecting member 8 is a mirror finish.

[0041] The reflecting member 8 has a first opening 82 and a second opening 83. The first opening 82 and the second opening 83 are substantially circular. The first opening 82 and the second opening 83 are aligned in the direction in which the light L is emitted. The first opening 82 and the second opening 83 have different diameters. As shown in FIG. 2 , the first opening 82 is an opening located on the light source unit 7 side. The diameter of the first opening 82 is smaller than the diameter of the second opening 83. The second opening 83 is an opening located on the irradiation surface side onto which the light L is irradiated. The diameter of the second opening 83 is larger than the diameter of the first opening 82. The light L emitted from the light source unit 7 enters through the first opening 82, passes through the second opening 83, and exits. The reflecting member 8 is formed of, for example, a synthetic resin. Alternatively, the reflecting member 8 may be formed of a metal.

[0042] Next, the lighting fixture 100 will be described in more detail with reference to Figures 2 to 4. Figure 3 is a view of the lighting fixture 100 of this embodiment as seen from the irradiation surface side. Figure 4 is a view of the louver 9 of the lighting fixture 100 of this embodiment. The louver 9 is an example of a "light control member."

[0043] The lighting fixture body 1 of the lighting fixture 100 further includes a louver 9. The louver 9 controls light. The louver 9 controls the light passing through it to suppress flare that occurs on the illuminated surface. Flare occurs when excess light, separate from the main light distribution, reaches the illuminated surface. In other words, flare occurs when light emitted from the light source 711 deviates from the specified optical path and reaches the illuminated surface. Specifically, flare is a ring-shaped high-intensity light that occurs around a substantially circular high-intensity light centered on the optical axis on the illuminated surface when, for example, the light source 711 illuminates an illuminated surface (floor surface) perpendicular to the optical axis. The louver 9 is a flare-cut louver. The louver 9 may be made of metal. For example, the louver 9 is made of aluminum or an aluminum alloy.

[0044] In this embodiment, the louvers 9 are fixed to the reflecting member 8 as shown in Fig. 2. Specifically, the louvers 9 are attached to the second opening 83 side of the reflecting member 8. More specifically, the louvers 9 are disposed inside the reflecting member 8.

[0045] A portion of the light emitted from the light source 711 passes through the louver 9. Furthermore, another portion of the light emitted from the light source 711 is reflected to the inside of the reflecting member 8. The light reflected by the reflecting member 8 passes through the louver 9.

[0046] The louvers 9 include inner louvers 91 and outer louvers 92 arranged radially outward of the inner louvers 91. The inner louvers 91 include a first main body portion 911, a first incident portion 914, and a first exit portion 913.

[0047] The first incident portion 914 is located at one end of the first main body portion 911. The one end of the first main body portion 911 is the end on the opposite side of the irradiation direction L. Specifically, the one end of the first main body portion 911 is the end on the direction from the first exit portion 913 toward the first incident portion 914. In a state in which the louver 9 is attached to the reflecting member 8, the first incident portion 914 is located closer to the light source 711 than the first exit portion 913. Furthermore, as shown in FIG. 2, the first incident portion 914 is located inside the reflecting member 8.

[0048] The first incident portion 914 has a first incident opening 914H. Light is incident through the first incident opening 914H. The light incident through the first incident opening 914H enters the inside of the first main body portion 911.

[0049] The first exit portion 913 is located on the other end side of the first main body portion 911. The other end side of the first main body portion 911 is an end portion in the irradiation direction L. Specifically, the other end side of the first main body portion 911 is an end portion on the side in the direction from the first entrance portion 914 toward the first exit portion 913. In a state in which the louver 9 is attached to the reflecting member 8, the first exit portion 913 is located closer to the exit surface than the first entrance portion 914. In the present embodiment, as shown in FIG. 2 , the first exit portion 913 protrudes from the reflecting member 8. Specifically, the first exit portion 913 is located closer to the irradiation surface than the second opening 83 of the reflecting member 8.

[0050] The first emission unit 913 has a first emission opening 913H. Light that has entered the first main body unit 911 is emitted from the first emission opening 913H. In this embodiment, the position of the first emission opening 913H in the irradiation direction L is located closer to the emission surface than the position of the second opening 83 of the reflecting member 8 in the irradiation direction L. The position of the first emission opening 913H in the irradiation direction L may be the same as the position of the second opening 83 of the reflecting member 8 in the irradiation direction L. The position of the first emission opening 913H in the irradiation direction L may also be closer to the light source 711 than the position of the second opening 83 of the reflecting member 8 in the irradiation direction L.

[0051] First main body portion 911 has a cylindrical shape. Light passes through the inside of first main body portion 911. Specifically, light traveling from first incident portion 914 to first exit portion 913 passes through the inside of first main body portion 911.

[0052] The first main body portion 911 includes a first inner circumferential surface 911A and a first outer circumferential surface 911B. The first inner circumferential surface 911A is a surface on the inner side ID of the louver 9 in the radial direction DA.

[0053] The first outer peripheral surface 911B is the surface on the outer side OD in the radial direction DA of the louver 9. Of the first inner peripheral surface 911A and the first outer peripheral surface 911B, at least the first inner peripheral surface 911A is a reflective surface that reflects light. Therefore, excessive attenuation of light passing through the louver 9 can be suppressed. As a result, a decrease in the light extraction efficiency can be suppressed.

[0054] In this embodiment, the first inner circumferential surface 911A is a reflective surface, but the first outer circumferential surface 911B may also be a reflective surface. A reflective surface is a surface whose light reflectance is greater than its light absorptance. In this specification, the light reflectance indicates the ratio of light reflected by an object to light incident on the object. Furthermore, the light absorptance indicates the ratio of light absorbed by an object to light incident on the object.

[0055] In this embodiment, the reflectance of first inner circumferential surface 911A is different from the reflectance of first outer circumferential surface 911B. Specifically, the reflectance of first inner circumferential surface 911A is greater than the reflectance of first outer circumferential surface 911B.

[0056] That is, first inner circumferential surface 911A is a highly reflective surface that reflects light more easily than first outer circumferential surface 911B. That is, being reflective of light more easily means that the light absorption rate is lower than that of first outer circumferential surface 911B. Also, first outer circumferential surface 911B is a low-reflective surface that reflects light less easily than first inner circumferential surface 911A. That is, being a low-reflective surface that reflects light less means that the light absorption rate is higher than that of first inner circumferential surface 911A.

[0057] Therefore, first outer peripheral surface 911B can reduce reflection of light emitted from light source 711 and light reflected by reflecting member 8. In other words, it is possible to reduce flare that occurs on the irradiation surface due to light reflection on first outer peripheral surface 911B. Furthermore, light reflected on first inner peripheral surface 911A is emitted from first emission opening 913H of first emission portion 913. Therefore, it is possible to prevent excessive reduction in light efficiency compared to a louver in which light is not reflected on the inner surface. As a result, it is possible to prevent excessive reduction in light efficiency while reducing flare.

[0058] In addition, the first inner circumferential surface 911A of this embodiment is a mirror finish. The first inner circumferential surface 911A may be painted in a color that easily reflects light. For example, the first inner circumferential surface 911A is painted white.

[0059] The first outer peripheral surface 911B reduces reflection of light and may also absorb light.

[0060] Therefore, most of the light that strikes first outer peripheral surface 911B is absorbed by first outer peripheral surface 911B without being reflected. In other words, the reflection of light from first outer peripheral surface 911B is reduced, and unnecessary light components that cause flare on the illuminated surface can be reduced. This reduces flare on the illuminated surface. As a result, it is possible to further reduce flare while further suppressing a decrease in light efficiency.

[0061] For example, first outer peripheral surface 911B is painted in a color that is less likely to reflect light. More specifically, first outer peripheral surface 911B is painted black. Note that first outer peripheral surface 911B is not limited to being painted black, as long as it is treated to at least attenuate incident light.

[0062] 3 and 4, the first emission portion 913 has a pair of grooves. The pair of grooves is formed from the first outer peripheral surface 911B of the first main body portion 911 to the first inner peripheral surface 911A of the first main body portion 911. In other words, the pair of grooves penetrates the first main body portion 911 in the radial direction DA. The irradiation direction L side of the pair of grooves is open.

[0063] The pair of grooves includes groove 913A and groove 913B. In Fig. 3, groove 913B is disposed at a position that is 180 degrees different from groove 913A. In other words, groove 913A and groove 913B are aligned in the radial direction DA.

[0064] As shown in FIGS. 2 to 4, the outer louver 92 of this embodiment may further include a second main body portion 921, a second incident portion 924, and a second exit portion 923.

[0065] Second incident portion 924 is located at one end side of second main body portion 921. One end side of second main body portion 921 is an end side on the opposite side of irradiation direction L. Specifically, one end side of second main body portion 921 is an end side on the direction side from second exit portion 923 toward second incident portion 924.

[0066] 2, in a state in which the louver 9 is attached to the reflecting member 8, the second incident portion 924 is located closer to the light source 711 than the second exit portion 923. The second incident portion 924 is farther from the light source 711 than the first incident portion 914. The second incident portion 924 is located inside the reflecting member 8.

[0067] The second incident portion 924 has a second incident opening 924H. Light is incident through the second incident opening 924H. The light incident through the second incident opening 924H penetrates between the second main body portion 921 and the first main body portion 911.

[0068] The second exit portion 923 is located on the other end side of the second main body portion 921. The other end side of the second main body portion 921 is in a direction along the irradiation direction L. Specifically, the other end side of the second main body portion 921 is the end portion on the direction side from the second entrance portion 924 toward the second exit portion 923. In a state in which the louver 9 is attached to the reflecting member 8, the second exit portion 923 is located closer to the exit surface than the second entrance portion 924. In this embodiment, as shown in FIG. 2, the second exit portion 923 protrudes from the reflecting member 8.

[0069] The second emission unit 923 has a second emission opening 923H. Light that has entered the second main body unit 921 is emitted from the second emission opening 923H. In this embodiment, the position of the second emission opening 923H in the irradiation direction L is closer to the second opening 83 of the reflecting member 8 than the position of the first emission opening 913H in the irradiation direction L. The position of the second emission opening 923H in the irradiation direction L may also be approximately the same as the position of the first emission opening 913H in the irradiation direction L. The position of the second emission opening 923H in the irradiation direction L may also be closer to the emission surface than the position of the first emission opening 913H in the irradiation direction L.

[0070] Second main body portion 921 has a cylindrical shape. Light passes through the inside of second main body portion 921. Specifically, light traveling from second incident portion 924 to second exit portion 923 passes through the inside of second main body portion 921.

[0071] Furthermore, the diameter of the second body portion 921 is larger than the diameter of the first body portion 911. The second body portion 921 surrounds at least a portion of the first body portion 911. Specifically, the second body portion 921 surrounds at least a portion of the first body portion 911 in the circumferential direction. In other words, the second body portion 921 is located on the outer side OD of the first body portion 911 in the radial direction DA.

[0072] In this embodiment, the length of the second main body portion 921 along the irradiation direction L is shorter than the length of the first main body portion 911 along the irradiation direction L. Furthermore, the length of the second main body portion 921 along the irradiation direction L may be longer than or the same as the length of the first main body portion 911 along the irradiation direction L.

[0073] If the length of the second main body portion 921 along the irradiation direction L is shorter than that of the first main body portion 911, it is desirable that the first inner surface 911A of the first main body portion 911 and the second inner surface 921A of the second main body portion 921 are mirror-finished, and that the first outer surface 911B of the first main body portion 911 and the second outer surface 921B of the second main body portion 921 are painted black.

[0074] In addition, when the first inner surface 911A and the first outer surface 911B of the first main body portion 911 are mirrored, the length of the second main body portion 921 along the irradiation direction L may be longer or shorter than the length of the first main body portion 911 along the irradiation direction L.

[0075] Furthermore, second main body portion 921 and first main body portion 911 are arranged concentrically, so that the center of first entrance opening 914H, the center of first exit opening 913H, the center of second entrance opening 924H, and the center of second exit opening 923H coincide with each other.

[0076] Second main body portion 921 includes a second inner circumferential surface 921A and a second outer circumferential surface 921B. Second inner circumferential surface 921A is a surface on the inner side ID in the radial direction DA of louver 9. Second inner circumferential surface 921A reflects light.

[0077] The second inner circumferential surface 921A faces the first outer circumferential surface 911B of the first main body portion 911. In other words, the second inner circumferential surface 921A, which reflects light, faces the first outer circumferential surface 911B, which absorbs light. Therefore, when a portion of the light reflected by the second inner circumferential surface 921A is incident on the first outer circumferential surface 911B, the light is absorbed. Furthermore, because the second inner circumferential surface 921A faces the first outer circumferential surface 911B, the reflection of the other portion of the light reflected by the second inner circumferential surface 921A is reduced by the first outer circumferential surface 911B.

[0078] When the louver 9 is attached to the reflecting member 8, the second outer peripheral surface 921B can face the inner peripheral surface 81 of the reflecting member 8. The second outer peripheral surface 921B is the surface on the outer side OD in the radial direction DA of the louver 9. The reflectance of the second inner peripheral surface 921A and the reflectance of the second outer peripheral surface 921B are different. Specifically, the reflectance of the second inner peripheral surface 921A is greater than the reflectance of the second outer peripheral surface 921B.

[0079] The second inner circumferential surface 921A is a highly reflective surface that reflects light more easily than the second outer circumferential surface 921B. Moreover, the second outer circumferential surface 921B is a low-reflective surface that reflects light less easily than the second inner circumferential surface 921A. Therefore, the second outer circumferential surface 921B can reduce the reflection of light that could not be reduced by the first outer circumferential surface 911B. In other words, the second outer circumferential surface 921B can reduce the reflection of light emitted from the light source 711 that could not be reduced by the first outer circumferential surface 911B, and the reflection of light reflected by the reflecting member 8 that could not be reduced by the first outer circumferential surface 911B. Therefore, flare caused by light reflection can be further reduced.

[0080] Furthermore, a portion of the light reflected by second inner circumferential surface 921A is emitted from second emission opening 923H of second emission part 923. As a result, it is possible to reduce the amount of light directed toward the outer side OD in radial direction DA, while suppressing the reduction in the amount of light directed toward the inner side ID in radial direction DA.

[0081] It is preferable that the reflectance of second inner circumferential surface 921A and the reflectance of first inner circumferential surface 911A are approximately the same. In other words, it is preferable that second inner circumferential surface 921A is a mirror finish. Second inner circumferential surface 921A may be painted in a color that easily reflects light.

[0082] The second outer peripheral surface 921B reduces reflection of light. The second outer peripheral surface 921B may absorb light. For example, the second outer peripheral surface 921B is painted in a color that does not reflect light easily. More specifically, the second outer peripheral surface 921B is painted black. Note that the second outer peripheral surface 921B is not limited to being painted black, and may be treated in any way to at least attenuate incident light.

[0083] Therefore, most of the light that strikes second outer peripheral surface 921B is absorbed by second outer peripheral surface 921B without being reflected. As a result, the reflection of light from second outer peripheral surface 921B is reduced, and unnecessary light components that cause flare on the illuminated surface can be reduced.

[0084] 3 and 4, second emission portion 923 has a pair of grooves. The pair of grooves is formed from second outer peripheral surface 921B of second main body portion 921 to second inner peripheral surface 921A of second main body portion 921. In other words, the pair of grooves penetrates second main body portion 921 in radial direction DA. The irradiation direction L side of the pair of grooves is open.

[0085] The pair of grooves includes groove 923A and groove 923B. When louver 9 is viewed from the irradiation surface side as shown in Fig. 3, groove 923B is positioned at a position that is 180 degrees different from groove 923A. Also, as shown in Fig. 3, groove 923A, groove 913A, groove 913B, and groove 923B are aligned in a radial direction DA.

[0086] As shown in FIGS. 2 to 4, the louver 9 of this embodiment further includes an attachment portion 93 and a connection portion 94. As shown in FIGS.

[0087] The connecting portion 94 connects the first main body portion 911 and the attachment portion 93. Therefore, when the attachment portion 93 is supported by the case portion 62, the first main body portion 911 and the first incident portion 914 are positioned inside the reflecting member 8. Specifically, the connecting portion 94 is inserted into grooves 913A and 913B of the first exit portion 913. Then, the first exit portion 913 is fixed to the connecting portion 94. The connecting portion 94 and the first exit portion 913 are fixed together by, for example, welding.

[0088] Furthermore, connecting portion 94 further connects second main body portion 921 and mounting portion 93. Therefore, mounting portion 93 is supported by case portion 62, so that second main body portion 921 and second incident portion 924 are positioned inside reflecting member 8. Specifically, connecting portion 94 is inserted into grooves 923A and 923B of second output portion 923. Then, second output portion 923 is fixed to connecting portion 94. Connecting portion 94 and second output portion 923 are fixed together by, for example, welding.

[0089] In other words, the connection portion 94 connects the first main body portion 911 and the second main body portion 921. Furthermore, the connection portion 94 connects the first main body portion 911, the second main body portion 921, and the attachment portion 93. Therefore, by supporting the attachment portion 93 on the case portion 62, the first main body portion 911 and the second main body portion 921 are attached to the reflective member 8, and the louver 9 is attached to the reflective member 8.

[0090] The connecting portion 94 extends in a direction intersecting the irradiation direction L. In the present embodiment, in a cross-sectional view, the connecting portion 94 extends in a direction intersecting the extending direction of the first main body portion 911 and the extending direction of the second main body portion 921. Specifically, in a cross-sectional view, the first main body portion 911 and the second main body portion 921 are perpendicular to the connecting portion 94. The connecting portion 94 is fixed to the inside of the mounting portion 93. The connecting portion 94 has a thin plate shape. The connecting portion 94 includes a pair of side surfaces 941, a lower surface 943, and an upper surface 944.

[0091] The pair of side surfaces 941 are surfaces that are oriented along the irradiation direction L.

[0092] The lower surface 943 is the surface on the side of the irradiation direction L. When the louver 9 is attached to the reflecting member 8, the lower surface 943 faces the irradiation surface.

[0093] The upper surface 944 is the surface opposite to the irradiation direction L. The upper surface 944 is located closer to the light source 711 than the lower surface 943. The upper surface 944 is the surface that faces the light source 711 when the louver 9 is attached to the reflecting member 8.

[0094] The mounting portion 93 is supported by the case portion 62. As shown in Fig. 2, when supported by the case portion 62, the mounting portion 93 is located on the irradiation direction L side of the reflecting member 8. Specifically, the first main body portion 911 and the second main body portion 921 are fixed to the connection portion 94, and the mounting portion 93 is supported by the case portion 62, whereby the louver 9 is attached to the irradiation direction L side of the reflecting member 8.

[0095] Next, the lighting fixture 100 according to this embodiment will be described in more detail with reference to FIGS. 5 to 10, by comparing the lighting fixture 100 according to this embodiment with a lighting fixture of a comparative example.

[0096] Fig. 5 is a diagram showing the light source unit 7, the reflective member 8, and the louver 9 of the lighting fixture 100 according to this embodiment. Fig. 5 is a diagram showing the VV cross section shown in Fig. 3. Fig. 6 is a diagram schematically showing the light irradiation pattern when the lighting fixture 100 according to this embodiment illuminates the irradiation surface. Fig. 7 is a graph G1 schematically showing the relationship between the position where the light irradiation pattern is formed and the illuminance.

[0097] For ease of understanding, FIG. 5 omits all components of lighting device 100 except light source unit 7, reflective member 8, and louver 9. FIG. 5 schematically shows a plurality of light beams emitted from light source 711. The plurality of light beams include light beams LN1 to LN7. The cross section of louver 9 shown in FIG. 5 is a cross section taken along the direction from first incident portion 914 to first exit portion 913.

[0098] Light LN1 to light LN3 are portions of light that pass through the louver 9 and head toward the irradiation surface. Light LN1 is light that passes through the first main body portion 911 and heads toward the irradiation surface. Light LN2 is light that enters the first main body portion 911, is reflected by the first inner circumferential surface 911A, and heads toward the irradiation surface. Light LN3 is light that enters the second main body portion 921, is reflected by the second inner circumferential surface 921A, and heads toward the irradiation surface.

[0099] The light LN4 is a part of the light that passes through the second opening 83 of the reflecting member 8 and heads toward the irradiation surface. Specifically, the light LN4 is light that is reflected by the inner circumferential surface 81 of the reflecting member 8 and heads toward the irradiation surface.

[0100] Light LN5 to light LN7 are part of the light that is directed toward directions other than the irradiation surface. Light LN5 is absorbed by the surface of the first incident portion 914 on the light source 711 side. Light LN6 is absorbed by the first outer peripheral surface 911B of the first main body portion 911. Light LN7 is absorbed by the second outer peripheral surface 921B of the second main body portion 921.

[0101] Although it has been described that the light LN5 to the light LN7 are absorbed, most of the light LN5 to the light LN7 may be absorbed and the remaining part may be reflected. Furthermore, the remaining part of the light may be diffused or attenuated as the optical path length increases. Therefore, only a small amount of the light reaches areas other than the illuminated surface.

[0102] Next, referring to Figure 6, we will explain the light irradiation pattern when light LN1 to light LN4 reach the irradiation surface. The light irradiation pattern includes a first region L10 and a second region L20. The first region L10 indicates, for example, the region where light LN1 to light LN3 reach. The first region L10 is located inside the second region L20. The second region L20 indicates the region where light LN4 reaches. The second region L20 indicates the region outside the first region L10. The second region L20 surrounds the first region L10.

[0103] Next, the illuminance (LX) of the light irradiation pattern of lighting device 100 according to this embodiment will be described with reference to Fig. 7. Graph G1 shown in Fig. 7 includes positions P1 to P5.

[0104] Positions P1 and P5 are the outer edge of the second region L20. Positions P2 and P4 are the boundary between the first region L10 and the second region L20. That is, positions P2 and P4 are the inner edge of the second region L20 and the outer edge of the first region L10. The illuminance detectable between positions P1 and P2 and between positions P4 and P5 is smaller than the illuminance detectable between positions P2 and P4. Position P3 is in the middle of the first region L10. The illuminance at position P3 is the highest illuminance value LXA that can be detected in the first region L10.

[0105] Next, a louver 1000 of a lighting fixture according to a comparative example will be described with reference to FIG. 7 and FIGS. 8 to 10. FIG.

[0106] Fig. 8 is a diagram showing louver 1000 of a lighting fixture according to a comparative example. Fig. 9 is a diagram schematically showing the light irradiation pattern when the lighting fixture according to the comparative example illuminates an irradiation surface. Fig. 10 is a graph G10 schematically showing the relationship between the position where the light irradiation pattern of the comparative example is formed and the illuminance. The cross section of louver 1000 shown in Fig. 8 is a cross section along the irradiation direction L.

[0107] 8, for ease of understanding, the lighting fixture is omitted except for the light source unit 7, the reflecting member 8, and the louver 1000. The comparative example differs from the louver 9 of the present embodiment in that the inner and outer peripheral surfaces of the first main body portion 1011 of the louver 1000 and the inner and outer peripheral surfaces of the second main body portion 1021 absorb light.

[0108] Louver 1000 of the comparative example includes first main body portion 1011, first incident portion 1014, first exit portion 1013, second main body portion 1021, second incident portion 1024, second exit portion 1023, mounting portion 1093, and connecting portion 1094.

[0109] The first main body portion 1011 has a first inner circumferential surface 1011A and a first outer circumferential surface 1011B. The first incident portion 1014 includes a first incident opening 1014H. The first exit portion 1013 includes a first exit opening 1013H. The second main body portion 1021 has a second inner circumferential surface 1021A and a second outer circumferential surface 1021B. The second incident portion 1024 includes a second incident opening 1024H. The second exit portion 1023 includes a second exit opening 1023H.

[0110] The first inner peripheral surface 1011A, the first outer peripheral surface 1011B, the second inner peripheral surface 1021A, and the second outer peripheral surface 1021B of the comparative example louver 1000 absorb light. For example, the first outer peripheral surface 1011B, the second inner peripheral surface 1021A, and the second outer peripheral surface 1021B are painted black, which is less likely to reflect light.

[0111] 8 schematically shows a plurality of light beams emitted from the light source 711. The plurality of light beams includes light beams LC1 to LC7.

[0112] Light LC1 is a part of the light that passes through louver 1000 and heads toward the irradiation surface. Specifically, light LC1 is light that passes through first main body portion 1011 and heads toward the irradiation surface.

[0113] Light LC4 is a part of the light that passes through the second opening 83 of the reflecting member 8 and heads toward the irradiation surface. Specifically, light LC4 is light that is reflected by the inner circumferential surface 81 of the reflecting member 8 and heads toward the irradiation surface.

[0114] Light LC2, light LC3, light LC5, light LC6, and light LC7 are portions of light that are directed toward directions other than the irradiation surface. Light LC2 is absorbed by the first outer peripheral surface 1011B of the first main body portion 1011. Light LC3 is absorbed by the second outer peripheral surface 1021B of the second main body portion 1021. Light LC5 is absorbed by the surface of the first incident portion 1014 on the light source 711 side. Light LC6 is absorbed by the first outer peripheral surface 1011B of the first main body portion 1011. Light LC7 is absorbed by the second outer peripheral surface 1021B of the second main body portion 1021.

[0115] Next, referring to Fig. 9, a light irradiation pattern when light LC1 and light LC4 reach the irradiation surface will be described. The light irradiation pattern includes a third region L30 and a fourth region L40. The third region L30 indicates, for example, the region where light LC1 and light LC4 reach. The fourth region L40 indicates the region where light LC4 reaches. The fourth region L40 surrounds the third region L30.

[0116] Next, the illuminance of the light irradiation pattern of the lighting device according to the comparative example will be described with reference to Fig. 10. Graph G2 shown in Fig. 10 includes positions PA to PE.

[0117] Positions PA and PE are the outer edge of the fourth region L40. Positions PB and PD are the boundary between the third region L30 and the fourth region L40. The illuminance detectable between positions PA and PB and between positions PD and PE is smaller than the illuminance detectable between positions PB and PD. Position PA is also in the middle of the third region L30. The illuminance at position PA is LXB, the highest value of illuminance detectable in the third region L30.

[0118] 10, in the louver 1000 of the comparative example, light such as light LC1 reaches the third region L30. However, light LC2 and light LC3 do not reach the third region L30, and therefore the amount of light that reaches the irradiation surface is excessively reduced.

[0119] 7, in the louver 9 according to this embodiment, not only light LN1 but also light LN2 reflected by the first inner circumferential surface 911A and light LN3 reflected by the second inner circumferential surface 921A reach the first region L10. Therefore, the value LXA detected at position P3 is greater than the value LXB detected at position PA shown in FIG. 10. Therefore, compared to the comparative example, the louver 9 according to this embodiment can prevent excessive reduction in illuminance while reducing the reflection of light that causes flare.

[0120] [Variation 1] Next, a lighting fixture 100 according to a first modification of the present embodiment will be described with reference to Fig. 1 and Figs. 11 to 13. The lighting fixture 100 of the first modification differs mainly from the louver 9 of the lighting fixture 100 of the present embodiment in that the louver 9 has only a first main body portion 911. In other words, the louver 9 of the lighting fixture 100 of the first modification does not have a second main body portion 921. Below, the differences between the first modification and the present embodiment will be mainly described.

[0121] Fig. 11 is a diagram schematically illustrating lighting device 100 according to Modification 1. Fig. 12 is a diagram schematically illustrating a light irradiation pattern when lighting device 100 according to Modification 1 illuminates an irradiation surface. Fig. 13 is a graph G2 schematically illustrating the relationship between the position where the light irradiation pattern is formed and the illuminance.

[0122] 11 omits all components of lighting fixture 100 except light source unit 7, reflective member 8, and louver 9 for ease of understanding. FIG. 11 shows a state in which louver 9 is attached to reflective member 8. The cross section of louver 9 of Modification 1 shown in FIG. 11 is a cross section along the direction from first incident portion 914 to first exit portion 913.

[0123] Louver 9 of Modification 1 includes first main body portion 911, first incident portion 914, first exit portion 913, attachment portion 93, and connection portion 94.

[0124] The first entrance portion 914 includes a first entrance opening 914H. The first exit portion 913 includes a first exit opening 913H.

[0125] The first main body portion 911 has a cylindrical shape. The first main body portion 911 has a first inner circumferential surface 911A and a first outer circumferential surface 911B. The first inner circumferential surface 911A reflects light. The reflectance of the first inner circumferential surface 911A is different from the reflectance of the first outer circumferential surface 911B.

[0126] Specifically, the reflectance of first inner circumferential surface 911A is greater than the reflectance of first outer circumferential surface 911B. Therefore, first outer circumferential surface 911B can reduce flare caused by light reflection. Furthermore, light reflected by first inner circumferential surface 911A is emitted from first emission opening 913H of first emission part 913. As a result, it is possible to reduce flare while preventing excessive reduction in light efficiency.

[0127] Continuing with reference to Fig. 11, the light emitted when louver 9 of Modification 1 is attached to reflecting member 8 of lighting fixture 100 will be described. Fig. 11 schematically shows a plurality of light beams emitted from light source 711 of lighting fixture 100 of Modification 1. Fig. 11 also schematically shows a plurality of light beams emitted from light source 711. The plurality of light beams includes light beams LN11 to LN16.

[0128] Light LN11 to light LN13 are parts of the light that passes through the louver 9 and heads toward the irradiation surface. Light LN11 and light LN12 are lights that pass through the first main body portion 911 and heads toward the irradiation surface. Light LN13 is light that enters the first main body portion 911, is reflected by the first inner circumferential surface 911A, and heads toward the irradiation surface.

[0129] Light LN14 is a portion of the light that passes through the second opening 83 of the reflecting member 8 and heads toward the irradiation surface. Specifically, light LN14 is light that is reflected by the inner circumferential surface 81 of the reflecting member 8 and heads toward the irradiation surface.

[0130] Light LN15 and light LN16 are parts of light that are directed toward directions other than the irradiation surface. Light LN15 is absorbed by the surface of the first incident portion 914 on the light source 711 side. Light LN16 is absorbed by the first outer peripheral surface 911B of the first main body portion 911.

[0131] Next, with reference to Fig. 12, a light irradiation pattern when light LN11 to light LN14 reach the irradiation surface will be described. The light irradiation pattern includes a fifth region L13 and a sixth region L23. The fifth region L13 indicates, for example, the region reached by light LN11, light LN12, and light LN13. The sixth region L23 indicates the region reached by light LN14.

[0132] Next, the illuminance of the light irradiation pattern of lighting device 100 according to Modification 1 will be described with reference to Fig. 13. Graph G2 shown in Fig. 13 includes positions P6 to P10.

[0133] Positions P6 and P10 are the outer edge of the sixth region L23. Positions P7 and P9 are the boundary between the fifth region L13 and the sixth region L23. The illuminance detectable between positions P6 and P7 and between positions P9 and P10 is smaller than the illuminance detectable between positions P7 and P9. Position P8 is in the middle of the fifth region L13. The illuminance at position P8 is the highest illuminance value LXC that can be detected in the fifth region L13.

[0134] 11, the louver 9 according to the first modification not only allows light LN11 and light LN12, but also light LN13 reflected by the first inner circumferential surface 911A to reach the fifth region L13. Therefore, the value LXC detected at position P8 is greater than the value LXB detected at position PA shown in FIG. 10. Therefore, compared to the comparative example shown in FIG. 10, the louver 9 according to the first modification can prevent excessive reduction in illuminance while reducing the reflection of light that causes flare.

[0135] [Variation 2] Next, lighting fixture 100 according to Modification 2 of the present embodiment will be described with reference to Figures 14 to 16. Lighting fixture 100 of Modification 2 differs mainly from the shape of louver 9 of lighting fixture 100 of the present embodiment in the shape of first main body portion 911. Below, the differences between Modification 2 and the present embodiment will be mainly described.

[0136] Fig. 14 is a diagram schematically illustrating lighting device 100 according to Modification 2. For ease of understanding, Fig. 14 omits all components of lighting device 100 except for light source unit 7, reflective member 8, and louver 9. Fig. 14 illustrates a state in which louver 9 is attached to reflective member 8. The cross section of louver 9 according to Modification 2 shown in Fig. 14 is a cross section taken along the direction from first incident portion 914 to first exit portion 913.

[0137] Louver 9 of Modification 2 includes first main body portion 911, first incident portion 914, first exit portion 913, attachment portion 93, and connection portion 94.

[0138] The first main body portion 911 has a cylindrical shape.

[0139] The first incident portion 914 includes a first incident opening 914H. The first exit portion 913 includes a first exit opening 913H. The opening area of ​​the first incident opening 914H is smaller than the opening area of ​​the first exit opening 913H.

[0140] That is, the diameter of the first main body portion 911 of the second modification gradually increases with increasing distance from the light source 711. Therefore, the first main body portion 911 has a substantially truncated cone shape. Specifically, the first main body portion 911 has a substantially mortar shape.

[0141] Furthermore, the first main body portion 911 has a linear shape in cross section. That is, light is reflected by the inclined surface of the first main body portion 911, which gradually becomes larger as it gets farther away from the light source 711. This improves the possibility of narrowing the light distribution angle. As a result, it becomes easier to collect light.

[0142] The first main body portion 911 has a first inner circumferential surface 911A and a first outer circumferential surface 911B.

[0143] In a cross-sectional view, first inner circumferential surface 911A extends from the edge of first incident opening 914H toward the edge of first exit opening 913H. As shown in Fig. 14, first inner circumferential surface 911A of Modification 2 is inclined from the edge of first incident opening 914H toward the edge of first exit opening 913H in a cross-sectional view.

[0144] The light reflected by the first inner circumferential surface 911A of the first main body portion 911, which gradually increases with increasing distance from the light source 711, tends to gather at the center of the irradiation pattern formed on the irradiation surface. This makes it easy to narrow the light distribution angle. In other words, it makes it easy to gather light on the irradiation surface. As a result, it is possible to reduce flare while preventing excessive reduction in light efficiency.

[0145] First inner circumferential surface 911A reflects light. The reflectance of first inner circumferential surface 911A is greater than the reflectance of first outer circumferential surface 911B. Therefore, first outer circumferential surface 911B can reduce flare caused by the reflection of light. Furthermore, light reflected by first inner circumferential surface 911A is emitted from first emission opening 913H of first emission portion 913. As a result, it is possible to reduce flare while preventing excessive reduction in light efficiency.

[0146] Furthermore, the first inner circumferential surface 911A of the second modification is a mirror surface. The first outer circumferential surface 911B absorbs light. Therefore, the reflection of light from the first outer circumferential surface 911B is reduced, and unnecessary light components that cause flare on the irradiated surface can be reduced. As a result, flare can be further reduced while further suppressing a decrease in light efficiency.

[0147] Continuing with reference to Fig. 14, the light emitted when louver 9 of Modification 2 is attached to reflecting member 8 of lighting fixture 100 will be described. Fig. 14 schematically shows a plurality of light beams emitted from light source 711 of lighting fixture 100 of Modification 2. Fig. 14 also schematically shows a plurality of light beams emitted from light source 711. The plurality of light beams includes light beams LN21 to LN26.

[0148] Light LN21 to light LN23 are parts of the light that passes through the louver 9 and heads toward the irradiation surface. Light LN21 and light LN22 are lights that pass through the first main body portion 911 and heads toward the irradiation surface. Light LN23 is light that enters the first main body portion 911, is reflected by the first inner circumferential surface 911A, and heads toward the irradiation surface.

[0149] The light LN24 is a part of the light that is reflected by the inner circumferential surface 81 of the reflecting member 8 and travels toward the irradiation surface.

[0150] Light LN25 and light LN26 are parts of light that are directed toward directions other than the irradiation surface. Light LN25 is absorbed by the surface of the first incident portion 914 on the light source 711 side. Light LN26 is absorbed by the first outer peripheral surface 911B of the first main body portion 911.

[0151] Next, the light irradiation pattern when light LN21 to light LN24 reach the irradiation surface will be described with reference to Fig. 15. Fig. 15 is a diagram schematically illustrating the light irradiation pattern when lighting device 100 according to Modification 2 illuminates the irradiation surface.

[0152] The light irradiation pattern includes a seventh region L14 and an eighth region L24. The seventh region L14 indicates an area reached by, for example, light LN21 and light LN23. The eighth region L24 indicates an area reached by light LN22 and light LN24.

[0153] Compared to louver 1000 of the comparative example shown in Fig. 8, louver 9 of modified example 2 can narrow the light distribution angle. Therefore, the size of the irradiation pattern of modified example 2 shown in Fig. 15 is smaller than the irradiation pattern of the comparative example shown in Fig. 9.

[0154] Next, the illuminance of the light irradiation pattern of lighting device 100 according to Variation 2 will be described with reference to Fig. 16. Fig. 16 is a graph G3 that schematically illustrates the relationship between the position where the light irradiation pattern is formed and the illuminance. Graph G3 shown in Fig. 16 includes positions P11 to P15.

[0155] Positions P11 and P15 are the outer edge of the eighth region L24. Positions P12 and P14 are the boundary between the seventh region L14 and the sixth region L23. The illuminance detectable between positions P11 and P12 and between positions P14 and P15 is smaller than the illuminance detectable between positions P12 and P14. Position P13 is in the middle of the seventh region L14. The illuminance at position P13 is the highest illuminance value LXD that can be detected in the seventh region L14.

[0156] 14, in the louver 9 according to the second modification, not only the light LN21 but also the light LN23 reflected by the first inner circumferential surface 911A reaches the seventh region L14. Therefore, the value LXD detected at the position P13 is greater than the value LXB detected at the position PA shown in FIG. 10. Therefore, compared to the comparative example shown in FIG. 10, the louver 9 according to the second modification can prevent an excessive reduction in illuminance while reducing the reflection of light that causes flare.

[0157] Furthermore, compared to louver 1000 according to the comparative example, louver 9 according to variant example 2 can narrow the angle of light distribution, thereby enabling light to be concentrated at position P13. Therefore, value LXD detected at position P13 shown in Fig. 13 is greater than value LXB detected at position PC shown in Fig. 10.

[0158] [Variation 3] Next, a lighting fixture 100 according to a third modification of the present embodiment will be described with reference to Figures 17 to 19. The lighting fixture 100 of the third modification differs from the shape of the louver 9 of the lighting fixture 100 of the present embodiment mainly in the shape of the first main body portion 911 of the louver 9. In the following, the differences between the third modification and this embodiment will be mainly described.

[0159] Fig. 17 is a diagram schematically illustrating a lighting device 100 according to Modification 3. For ease of understanding, Fig. 17 omits all components of lighting device 100 except for light source unit 7, reflective member 8, and louver 9. Fig. 17 illustrates a state in which louver 9 is attached to reflective member 8. The cross section of louver 9 according to Modification 3 shown in Fig. 17 is a cross section taken along the direction from first incident portion 914 to first exit portion 913.

[0160] Louver 9 of Modification 3 includes first main body portion 911, first incident portion 914, first exit portion 913, attachment portion 93, and connection portion 94.

[0161] The first main body portion 911 has a cylindrical shape.

[0162] First incident portion 914 includes a first incident opening 914H. First exit portion 913 includes a first exit opening 913H. The opening area of ​​first incident opening 914H is smaller than the opening area of ​​first exit opening 913H. In other words, the diameter of first main body portion 911 of Modification 3 gradually increases with increasing distance from light source 711.

[0163] Furthermore, the first main body portion 911 has a curved shape in a cross-sectional view. That is, the first main body portion 911 has a semi-frustum shape. Therefore, light is reflected by the curved surface of the first main body portion 911. This improves the possibility of narrowing the light distribution angle. As a result, it becomes even easier to collect light.

[0164] Continuing with reference to Fig. 17, the light emitted when louver 9 of Modification 3 is attached to reflecting member 8 of lighting fixture 100 will be described. Fig. 17 schematically shows a plurality of light beams emitted from light source 711 of lighting fixture 100 of Modification 2. Fig. 17 also schematically shows a plurality of light beams emitted from light source 711. The plurality of light beams includes light beams LN31 to LN35.

[0165] Light LN31 to light LN33 are parts of the light that passes through the louver 9 and heads toward the irradiation surface. Light LN31 is light that passes through the first main body portion 911 and heads toward the irradiation surface. Light LN32 is light that enters the first main body portion 911, is reflected by the first inner circumferential surface 911A, and heads toward the irradiation surface.

[0166] The light LN33 is a part of the light that is reflected by the inner circumferential surface 81 of the reflecting member 8 and travels toward the irradiation surface.

[0167] Light LN34 and light LN35 are parts of light that are directed toward directions other than the irradiation surface. Light LN34 is absorbed by the surface of the first incident portion 914 on the light source 711 side. Light LN35 is absorbed by the first outer peripheral surface 911B of the first main body portion 911.

[0168] Next, the light irradiation pattern when light LN31 to light LN33 reach the irradiation surface will be described with reference to Fig. 18. Fig. 18 is a diagram schematically illustrating the light irradiation pattern when lighting device 100 according to Modification 3 illuminates the irradiation surface. In louver 9 according to Modification 3, the illuminance decreases toward the outside of the irradiation pattern.

[0169] The light irradiation pattern includes a ninth region L15 and a tenth region L25. The ninth region L15 indicates an area reached by, for example, light LN31 and light LN32. The tenth region L25 indicates an area reached by light LN33.

[0170] Compared to the louver 1000 of the comparative example shown in Fig. 8, the louver 9 of the modified example 3 can narrow the light distribution angle. Therefore, the size of the irradiation pattern of the modified example 3 shown in Fig. 18 is smaller than the irradiation pattern of the comparative example shown in Fig. 9.

[0171] Next, the illuminance of the light irradiation pattern of lighting device 100 according to Variation 3 will be described with reference to Fig. 19. Fig. 19 is a graph G4 that schematically illustrates the relationship between the position where the light irradiation pattern is formed and the illuminance. Graph G4 shown in Fig. 19 includes positions P16 to P20.

[0172] Positions P16 and P20 are the outer edge of the tenth region L25. Positions P17 and P19 are the boundary between the ninth region L15 and the tenth region L25. The illuminance detectable between positions P16 and P17 and between positions P19 and P20 is smaller than the illuminance detectable between positions P17 and P19. Position P18 is in the middle of the ninth region L15. The illuminance at position P18 is the highest illuminance value LXE that can be detected in the ninth region L15.

[0173] 17, in the louver 9 according to the third modification, not only the light LN31 but also the light LN32 reflected by the first inner circumferential surface 911A reaches the ninth region L15. Therefore, the value LXE detected at the position P18 is greater than the value LXB detected at the position PA shown in Fig. 10. Therefore, compared to the comparative example shown in Fig. 10, the louver 9 according to the third modification can prevent an excessive reduction in illuminance while reducing the reflection of light that causes flare.

[0174] Furthermore, compared to louver 1000 according to the comparative example, louver 9 according to the third modification is able to concentrate light more at position P18, thereby improving light efficiency. Therefore, the value LXE detected at position P18 is greater than the value LXB detected at position PC shown in FIG.

[0175] [Variation 4] Next, lighting fixture 100 according to Modification 4 of the present embodiment will be described with reference to Figures 20 to 22. Lighting fixture 100 of Modification 4 differs mainly from the shape of louver 9 of lighting fixture 100 of the present embodiment in the shapes of first main body portion 911 and second main body portion 921 of louver 9. Below, the differences between Modification 4 and the present embodiment will be mainly described.

[0176] Fig. 20 is a diagram schematically illustrating a lighting device 100 according to Modification 4. For ease of understanding, Fig. 20 omits all components of lighting device 100 except for light source unit 7, reflective member 8, and louver 9. Fig. 20 shows a state in which louver 9 is attached to reflective member 8. The cross section of louver 9 according to Modification 4 shown in Fig. 20 is a cross section taken along the direction from first incident portion 914 to first exit portion 913.

[0177] Louver 9 of modification 4 includes first main body portion 911, first incident portion 914, first exit portion 913, second main body portion 921, second incident portion 924, second exit portion 923, attachment portion 93, and connection portion 94.

[0178] The first main body portion 911 has a linear shape in a cross-sectional view. Furthermore, the first main body portion 911 is inclined with respect to the connection portion 94 in a cross-sectional view. Specifically, the first main body portion 911 is inclined with respect to an upper surface 944 of the connection portion 94 or a lower surface 943 of the connection portion 94 in a cross-sectional view. An angle θ1 of the first main body portion 911 with respect to the connection portion 94 is an acute angle.

[0179] The second main body portion 921 has a linear shape in a cross-sectional view. Furthermore, the second main body portion 921 is inclined with respect to the connecting portion 94 in a cross-sectional view. Specifically, the second main body portion 921 is inclined with respect to an upper surface 944 of the connecting portion 94 or a lower surface 943 of the connecting portion 94 in a cross-sectional view. Angle θ2 of the second main body portion 921 with respect to the connecting portion 94 is an acute angle.

[0180] Angle θ2 and angle θ1 are different. Specifically, angle θ1 is larger than angle θ2. Therefore, because angle θ1 is larger than angle θ2, the possibility of narrowing the light distribution angle of light reflected by first inner circumferential surface 911A is improved. Furthermore, because angle θ2 is smaller than angle θ1, it is easier to collect light reflected by second inner circumferential surface 921A within the range reached by light reflected by first inner circumferential surface 911A. As a result, the area of ​​high illuminance can be expanded on the irradiation surface.

[0181] Continuing with reference to Fig. 21, the light emitted when louver 9 of Modification 4 is attached to reflecting member 8 of lighting fixture 100 will be described. Fig. 21 schematically shows a plurality of light beams emitted from light source 711 of lighting fixture 100 of Modification 4. Fig. 21 also schematically shows a plurality of light beams emitted from light source 711. The plurality of light beams includes light beams LN41 to LN46.

[0182] Light LN41 to light LN43 are parts of light that pass through the louver 9 and head toward the irradiation surface. Light LN41 and light LN42 are light that pass through the first main body portion 911 and head toward the irradiation surface. Light LN43 is light that enters the second main body portion 921, is reflected by the second inner circumferential surface 921A, and heads toward the irradiation surface.

[0183] The light LN44 is a part of the light that is reflected by the inner circumferential surface 81 of the reflecting member 8 and travels toward the irradiation surface.

[0184] Light LN45 and light LN46 are part of the light that is directed toward directions other than the irradiation surface. Light LN45 is absorbed by the surface of second incident portion 924 facing the light source 711. Light LN46 is absorbed by second outer peripheral surface 921B of second main body portion 921.

[0185] Next, the light irradiation pattern when light LN41 to light LN44 reach the irradiation surface will be described with reference to Fig. 22. Fig. 22 is a diagram schematically illustrating the light irradiation pattern when lighting device 100 according to Variation 4 illuminates the irradiation surface.

[0186] The configuration shown in Fig. 20 approaches the light irradiation pattern shown in Fig. 22. For example, when the irradiation pattern shown in Fig. 22 includes an eleventh region L16 and a twelfth region L26, the eleventh region L16 is imaged as being reached by light LN41, light LN42, light LN43, and light LN44, and the twelfth region L26 is imaged as being reached by light other than light LN41 to light LN44.

[0187] Compared with the louver 1000 of the comparative example shown in Fig. 8, the louver 9 of the modified example 4 can easily collect light and can expand the area of ​​high illuminance on the irradiation surface. Therefore, the size of the irradiation pattern of the modified example 4 shown in Fig. 21 is larger in the area of ​​high illuminance than the irradiation pattern of the comparative example shown in Fig. 9.

[0188] Next, the illuminance of the light irradiation pattern of lighting device 100 according to Variation 4 will be described with reference to Fig. 22. Fig. 22 is a graph G5 that schematically illustrates the relationship between the position where the light irradiation pattern is formed and the illuminance. Graph G5 shown in Fig. 22 includes positions P21 to P25.

[0189] Positions P21 and P25 are the outer edge of the twelfth region L26. Positions P22 and P24 are the boundary between the eleventh region L16 and the twelfth region L26. The illuminance detectable between positions P21 and P22 and between positions P24 and P25 is smaller than the illuminance detectable between positions P22 and P24. Position P23 is in the middle of the eleventh region L16. The illuminance at position P23 is the highest illuminance value LXF that can be detected in the eleventh region L16.

[0190] As shown in Fig. 20, the louver 9 according to the fourth modification allows the light LN41 to the light LN44 to reach the eleventh region L16. Therefore, the value LXF detected at the position P23 is greater than the value LXB detected at the position PA shown in Fig. 10. The high-illuminance area is also enlarged. Therefore, compared to the comparative example shown in Fig. 10, the louver 9 according to the fourth modification reduces the reflection of light that causes flare, prevents excessive reduction in illuminance, and can enlarge the high-illuminance area.

[0191] [Variation 5] Next, lighting fixture 100 according to Modification 5 of the present embodiment will be described with reference to Figures 23 to 25. Lighting fixture 100 of Modification 5 differs from the shape of louver 9 of lighting fixture 100 of the present embodiment mainly in the shape of first main body portion 911 and second main body portion 921 of louver 9. Below, the differences between Modification 5 and the present embodiment will be mainly described.

[0192] Fig. 23 is a diagram schematically illustrating lighting device 100 according to Modification 5. For ease of understanding, Fig. 23 omits all components of lighting device 100 except for light source unit 7, reflective member 8, and louver 9. Fig. 23 shows a state in which louver 9 is attached to reflective member 8. The cross section of louver 9 according to Modification 5 shown in Fig. 23 is a cross section taken along the direction from first incident portion 914 to first exit portion 913.

[0193] Louver 9 of modification 5 includes first main body portion 911, first incident portion 914, first exit portion 913, second main body portion 921, second incident portion 924, second exit portion 923, attachment portion 93, and connection portion 94.

[0194] The first main body portion 911 has a curved shape in a cross-sectional view. Furthermore, the first main body portion 911 is inclined with respect to the connection portion 94 in a cross-sectional view. Specifically, the first main body portion 911 is inclined with respect to an upper surface 944 of the connection portion 94 or a lower surface 943 of the connection portion 94 in a cross-sectional view. Furthermore, the first main body portion 911 has a first curvature.

[0195] The second main body portion 921 has a curved shape in a cross-sectional view. Furthermore, the second main body portion 921 is inclined with respect to the connecting portion 94 in a cross-sectional view. Specifically, the second main body portion 921 is inclined with respect to the upper surface 944 of the connecting portion 94 or the lower surface 943 of the connecting portion 94 in a cross-sectional view. Furthermore, the second main body portion 921 has a second curvature.

[0196] The first curvature and the second curvature are different. Specifically, the first curvature is greater than the second curvature. This increases the possibility of narrowing the angle of light distribution of light reflected by first inner circumferential surface 911A. Furthermore, the difference in illuminance between the inside and outside of the range reached by light reflected by first inner circumferential surface 911A increases, making it possible to highlight the range reached by light reflected by first inner circumferential surface 911A.

[0197] Continuing with reference to Fig. 24, the light emitted when louver 9 of Modification 5 is attached to reflecting member 8 of lighting fixture 100 will be described. Fig. 24 schematically shows a plurality of light beams emitted from light source 711 of lighting fixture 100 of Modification 5. Fig. 24 also schematically shows a plurality of light beams emitted from light source 711. The plurality of light beams includes light beams LN51 to LN55.

[0198] Light LN51 and light LN52 are portions of light that pass through the louver 9 and head toward the irradiation surface. Light LN51 is light that passes through the first main body portion 911 and heads toward the irradiation surface. Light LN52 is light that enters the second main body portion 921, is reflected by the second inner circumferential surface 921A, and heads toward the irradiation surface.

[0199] The light LN53 is a part of the light that is reflected by the inner circumferential surface 81 of the reflecting member 8 and travels toward the irradiation surface.

[0200] Light LN54 and light LN55 are parts of light that travel toward directions other than the irradiation surface. Light LN54 is absorbed by the surface of second incident portion 924 on the light source 711 side. Light LN55 is absorbed by second outer peripheral surface 921B of second main body portion 921.

[0201] Next, the light irradiation pattern when light LN51 to light LN53 reach the irradiation surface will be described with reference to Fig. 24. Fig. 24 is a diagram schematically illustrating the light irradiation pattern when lighting device 100 according to Variation 5 illuminates the irradiation surface.

[0202] The configuration shown in Fig. 23 approaches the light irradiation pattern shown in Fig. 25. For example, when the irradiation pattern shown in Fig. 25 includes a thirteenth region L17 and a fourteenth region L27, the thirteenth region L17 is imaged as being reached by light LN51, light LN52, and light LN53, and the fourteenth region L27 is imaged as being reached by light other than light LN51 to light LN53.

[0203] Compared with the louver 1000 of the comparative example shown in Fig. 8, the louver 9 of the modified example 5 can easily collect light and can expand the area of ​​high illuminance on the irradiation surface. Therefore, the size of the irradiation pattern of the modified example 5 shown in Fig. 24 is smaller in the area of ​​high illuminance than the irradiation pattern of the comparative example shown in Fig. 9.

[0204] Next, the illuminance of the light irradiation pattern of lighting device 100 according to Variation 5 will be described with reference to Fig. 25. Fig. 25 is a graph G6 that schematically illustrates the relationship between the position at which the light irradiation pattern is formed and the illuminance. Graph G6 shown in Fig. 25 includes positions P26 to P30.

[0205] Positions P26 and P30 are the outer edge of the fourteenth region L27. Positions P27 and P29 are the boundary between the thirteenth region L17 and the fourteenth region L27. The illuminance detectable between positions P26 and P27 and between positions P29 and P30 is smaller than the illuminance detectable between positions P27 and P29. Position P28 is in the middle of the thirteenth region L17. The illuminance at position P28 is the highest illuminance value LXG that can be detected in the thirteenth region L17.

[0206] As shown in Fig. 23, the louver 9 according to the fifth modification allows the light LN51 to the light LN53 to reach the thirteenth region L17. Therefore, the value LXG detected at the position P28 is greater than the value LXB detected at the position PA shown in Fig. 10. Therefore, compared to the comparative example shown in Fig. 10, the louver 9 according to the fifth modification can reduce the reflection of light that causes flare and make the high-illuminance region stand out.

[0207] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments and can be embodied in various forms without departing from the spirit and scope of the present invention. Furthermore, various inventions can be formed by appropriately combining multiple components disclosed in the above modifications. For example, some components may be omitted from all components shown in the modifications. Furthermore, components from different modifications may be appropriately combined. The drawings mainly show each component in a schematic manner to facilitate understanding. The thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of the drawings. Furthermore, the speed, material, shape, dimensions, etc. of each component shown in the above embodiments are merely examples and are not particularly limited. Various modifications are possible within a scope that does not substantially deviate from the configuration of the present invention.

[0208] (1) In the present embodiment, the first outer peripheral surface 911B of the first main body portion 911 is described as a low-reflection surface that does not easily reflect light. However, this is not limited to this. For example, a portion of the first outer peripheral surface 911B may be a low-reflection surface that does not easily reflect light. Furthermore, another portion of the first outer peripheral surface 911B may be a high-reflection surface that easily reflects light. For example, a portion of the first outer peripheral surface 911B that does not face the second inner peripheral surface 921A of the second main body portion 921 in a direction intersecting the irradiation direction L may be a low-reflection surface. In other words, a portion of the first outer peripheral surface 911B that is located closer to the light source 711 than the second incident portion 924 may be a low-reflection surface. Furthermore, a portion of the first outer peripheral surface 911B that faces the second inner peripheral surface 921A may be a high-reflection surface.

[0209] (2) In the present embodiment, the shape of first inner circumferential surface 911A and the shape of first outer circumferential surface 911B of first main body portion 911 are the same in a cross-sectional view, but this is not limited to this. For example, in a cross-sectional view, first inner circumferential surface 911A is an inclined surface that intersects with the direction from first incident portion 914 toward first exit portion 913. On the other hand, in a cross-sectional view, first outer circumferential surface 911B is a surface that extends in the direction from first incident portion 914 toward first exit portion 913. [Industrial Applicability]

[0210] The present invention provides a louver and a lighting fixture, and has industrial applicability. [Explanation of symbols]

[0211] 8: Reflective material 9: Louver 100: Lighting equipment 711 :Light source 911: First main body part 911A: First inner peripheral surface 911B: First outer peripheral surface 913: First exit section 913H: 1st exit aperture 914: 1st entrance part 914H: 1st entrance aperture 921: Second main body part 921A: Second inner circumferential surface 921B: Second outer peripheral surface 923: 2nd launch part 923H: Second exit opening 924: Second Entrance Section 924H: Second incident opening

Claims

1. A light control member through which light from a light source of a lighting fixture or the light reflected by a reflecting member of the lighting fixture passes, a cylindrical first main body portion; a first incident portion located on one end side of the first main body portion and having a first incident opening through which the light is incident; a first exit portion located on the other end side of the first main body portion and having a first exit opening through which the incident light is emitted; Equipped with The first main body portion is a first inner circumferential surface on the inside in the radial direction; a first outer peripheral surface on the radially outer side; Including, A light control member, wherein at least the first inner circumferential surface of the first inner circumferential surface and the first outer circumferential surface is a reflective surface that reflects light.

2. The light control member according to claim 1 , wherein the reflectance of the first inner circumferential surface is greater than the reflectance of the first outer circumferential surface.

3. the first inner circumferential surface is a mirror surface, The light control member according to claim 2 , wherein the first outer peripheral surface absorbs light.

4. a second body portion located radially outward of the first body portion and surrounding at least a portion of the first body portion; a second incident portion located on one end side of the second main body portion and having a second incident opening into which the light is incident; a second exit portion located on the other end side of the second main body portion and having a second exit opening through which the incident light is emitted; Further equipped with The second main body portion is a second inner peripheral surface on the radially inner side facing the first outer peripheral surface; a second outer peripheral surface on the radially outer side that can face the reflecting member; Including, The light control member according to claim 3 , wherein at least the second inner circumferential surface of the second inner circumferential surface and the second outer circumferential surface is a reflective surface.

5. The light control member according to claim 4 , wherein the reflectance of the second inner circumferential surface is greater than the reflectance of the second outer circumferential surface.

6. an opening area of ​​the first entrance opening is smaller than an opening area of ​​the first exit opening; The light control member according to claim 4 , wherein the first inner circumferential surface extends from an edge of the first incident opening toward an edge of the first exit opening in a cross-sectional view.

7. The light control member according to claim 6 , wherein the first main body portion has a linear or curved shape in a cross-sectional view.

8. a connecting portion that connects the first body portion and the second body portion, In a cross-sectional view, the first main body portion and the second main body portion are inclined with respect to the connection portion, The light control member according to claim 4 , wherein an angle of the first body portion relative to the connecting portion is larger than an angle of the second body portion relative to the connecting portion.

9. A light control member through which light from a light source of a lighting fixture or the light reflected by a reflecting member of the lighting fixture passes, a cylindrical first main body portion; a first incident portion located on one end side of the first main body portion and having a first incident opening through which the light is incident; a first exit portion located on the other end side of the first main body portion and having a first exit opening through which the incident light is emitted; Equipped with The first main body portion includes a first inner circumferential surface on the inside in the radial direction, an opening area of ​​the first entrance opening is smaller than an opening area of ​​the first exit opening; The first inner circumferential surface extends from an edge of the first entrance opening to an edge of the first exit opening in a cross-sectional view of the light control member.

10. The light control member according to claim 9 , wherein the first main body portion has a linear or curved shape in a cross-sectional view.

11. The first body portion further includes a first outer peripheral surface on the radially outer side, The light control member according to claim 10 , wherein at least the first inner circumferential surface of the first inner circumferential surface and the first outer circumferential surface is a reflective surface that reflects light.

12. The light control member according to claim 11 , wherein the reflectance of the first inner circumferential surface is greater than the reflectance of the first outer circumferential surface.

13. the first inner circumferential surface is a mirror surface, The light control member according to claim 12 , wherein the first outer peripheral surface is light absorbing.

14. A light source that emits light; a reflecting member that reflects the light; The light control member according to any one of claims 1 to 8, A lighting fixture comprising:

15. a light source that emits light; a reflecting member that reflects the light; The light control member according to any one of claims 9 to 13, A lighting fixture comprising:

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