JP2012145904A - Optical lens, lens unit using the same, and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical lens suppressing waste of light illuminated from a light source, and to provide a lens unit using the same and a luminaire.SOLUTION: An optical lens 21 includes a lens body 21a having a convex surface that is forward convexed in a first direction orthogonal to the cross direction. Prismatic reflection parts 21c and 21c that forward reflect light rays from an LED light source 25 disposed rearward are provided in both sides of the lens body 21a in a second direction which is orthogonal to the cross direction and the first direction respectively. Consequently, the light heading for the second direction among the light rays illuminated from the LED light source 25 is distributed to the forward so as to provide the optical lens 21 capable of increasing the amount of light to the front and suppressing the waste of the light.

Description

  The present invention relates to an optical lens, a lens unit using the optical lens, and a lighting fixture.

  Conventionally, an optical module used for a road illumination lamp for illuminating a road on which a vehicle passes has been provided (see, for example, Patent Document 1). This optical module includes a lens formed in a substantially hemispherical shape by a translucent material such as acrylic, and an LED light source arranged so that the focal position of the lens is the origin position. On the surface of the lens, reflective portions having a substantially triangular shape in cross-sectional view are provided in predetermined regions on both sides of the central axis of the LED light source. And this optical module is arrange | positioned so that the sequence direction of both said reflection parts may turn into the advancing direction of a vehicle, and the light from a LED light source is distributed by a wide angle in this advancing direction by this optical module.

JP 2010-205605 A (paragraph [0029] -paragraph [0046] and FIGS. 1-7)

  In the optical module shown in Patent Document 1 described above, the light distribution in the traveling direction of the vehicle can be widened, but in the width direction of the road perpendicular to the traveling direction of the vehicle, the light from both ends of the lens is outside the road. Therefore, light wasted correspondingly.

  The present invention has been made in view of the above problems, and an object thereof is to provide an optical lens that suppresses waste of light emitted from a light source, a lens unit using the same, and a lighting fixture. It is in.

  The optical lens of the present invention includes a convex lens provided with a convex curved surface convex forward in a first direction orthogonal to the front-rear direction, and is a convex lens in a second direction orthogonal to the front-rear direction and the first direction, respectively. Reflecting portions for reflecting light from a light source disposed on the rear side forward are provided on both sides.

  In this optical lens, the convex lens has an entrance surface that is orthogonal to the front-rear direction when viewed from the first direction and on which light from the light source is incident. The viewed shape is preferably symmetrical with respect to the convex lens.

  Further, in this optical lens, the convex lens has an incident surface on which light from the light source is incident perpendicular to the third direction inclined at a predetermined angle with respect to the front-rear direction when viewed from the first direction. It is preferable that the two reflection portions have an asymmetric shape with respect to the convex lens when viewed from the first direction, and the light reflected by both reflection portions is irradiated in the third direction.

  A lens unit according to the present invention is an aggregate including a plurality of the above-described optical lenses and a combination of the plurality of optical lenses.

  The lighting fixture of the present invention includes the optical lens or the lens unit described above, and a light source.

  There is an effect that it is possible to provide an optical lens, a lens unit, and a lighting fixture in which waste of light emitted from the light source is suppressed.

The optical lens of Embodiment 1 is shown, (a) is an external appearance perspective view, (b) (c) is sectional drawing. (A) (b) is a graph which shows the light distribution characteristic of the conventional optical lens, (c) (d) is a graph which shows the light distribution characteristic of the optical lens of Embodiment 1. FIG. 3 is a front view in which a part of the lens unit of Embodiment 1 can be omitted. It is an external appearance perspective view of the LED board which mounted the same and LED light source. It is an external appearance perspective view of the lighting fixture of Embodiment 1. FIG. It is a cross-sectional perspective view same as the above. (A) is a longitudinal cross-sectional view in which a part can be omitted, and (b) is a transverse cross-sectional view of the same. It is a construction drawing same as the above. It is a general | schematic external view which shows the other example same as the above. The optical lens of Embodiment 2 is shown, (a) is an external appearance perspective view, (b) (c) is sectional drawing. (A) (b) is a graph which shows the light distribution characteristic same as the above. 6 is a front view of a lens unit according to Embodiment 2. FIG. It is an external appearance perspective view of the LED board which mounted the same and LED light source. It is an external appearance perspective view of the lighting fixture of Embodiment 2. FIG. (A) is a cross-sectional perspective view of the same, and (b) is a partially enlarged view thereof. (A) is a longitudinal cross-sectional view same as the above, (b) is a cross-sectional view same as the above. (A) is a construction drawing same as the above, and (b) is a construction drawing of a conventional lighting fixture.

(Embodiment 1)
Embodiment 1 of an optical lens, a lens unit, and a lighting fixture will be described with reference to FIGS. As shown in FIG. 8, the lighting apparatus A according to the present embodiment is attached to, for example, the tip of a pole P standing along the road R, either directly or using an arm, and serves as a road lamp for illuminating the road R. Used.

  As shown in FIGS. 5 to 7, the lighting fixture A of the present embodiment includes a fixture main body 1, a plurality (four in FIG. 5) of LED substrates 20 on which LED light sources 25 (see FIG. 1) are mounted, The lens unit 2 (refer FIG. 4) arrange | positioned on the one surface of the LED board | substrate 20 so that the LED light source 25 may be covered. The luminaire A also includes an auxiliary reflector 3 that reflects light leaking into the fixture body 1 out of the light emitted from the LED substrate 20 downward (on the road R side), and a power source that supplies lighting power to the LED substrate 20. Unit 5 is provided.

  The instrument main body 1 is made of, for example, aluminum die-casting, and has a body 10 whose one surface (upper surface in FIG. 5) is opened, and covers 11 and 12 which are attached to the body 10 so as to close the upper surface opening of the body 10. With. This instrument main body 1 is comprised by the cylindrical part 1a and the flat plate part 1b integrally formed in the front end side (right side in FIG. 5) of the cylindrical part 1a, and the power supply unit 5 is contained in the cylindrical part 1a. Is housed, and an arm insertion portion 1c into which an arm (not shown) provided at the distal end portion of the pole P is inserted is provided on the base end side (left side in FIG. 6). In addition, a rectangular opening window 1d is provided on the other surface (the lower surface in FIG. 5) of the flat plate portion 1b of the appliance body 1, and a plurality of LED substrates 20 are disposed in the flat plate portion 1b so as to face the open window 1d. It is stored in.

  Further, a synthetic resin packing 7 formed in a U shape is provided over the entire periphery of the opening edge of the opening window 1d in the flat plate portion 1b, and a groove 7a provided in the packing 7 is provided. By inserting the end edge portion into the inside, the translucent panel 8 (for example, glass or the like) is arranged so as to face the opening window 1d.

  Further, on the side of the LED substrate 20 housed in the flat plate portion 1b (on both sides in the left-right direction in FIG. 7A), light that leaks from the LED substrate 20 into the instrument body 1 is downward. Auxiliary reflectors 3 and 3 are provided for reflection. Further, the heat generated by the LED light source 25 (see FIG. 1) mounted on the surface of the LED substrate 20 is radiated to the back surface of the LED substrate 20 (the upper surface in FIGS. 7A and 7B). A heat radiating plate 4 and heat radiating fins 9 are attached, and a heat radiating plate 6 (see FIG. 6) for radiating heat generated in the power unit 5 is also attached to the back surface of the power unit 5.

  Here, FIG. 4 is an external perspective view of the LED substrate 20, and a plurality of LED light sources 25 are mounted on one surface (the upper surface in FIG. 4) of the LED substrate 20 so as to cover these LED light sources 25. A plurality (three in FIG. 4) of lens units 2 are arranged. In addition, these lens units 2 are attached to the heat sink 4 using the mounting screws 23 and 24 together with the LED substrate 20.

  As shown in FIGS. 1B and 1C, the LED light source 25 has a mounting board 25a formed in a rectangular plate shape, and an LED chip (not shown) is provided at the approximate center of the mounting board 25a. Has been implemented. The LED chip mounted on the mounting substrate 25a is molded with the resin layer 25b. The LED light source 25 is mounted on the upper surface of the LED substrate 20 using solder, and the LED chip emits light by the power supplied from the LED substrate 20.

  As shown in FIGS. 3 and 4, the lens unit 2 is a resin molded product in which a plurality of optical lenses 21 and attachment members 22 and 22 for attaching these optical lenses 21 to the LED substrate 20 are integrally formed. Each mounting member 22 is formed in a rectangular plate shape arranged along the longitudinal direction of the LED substrate 20. Further, as shown in FIG. 3, a predetermined interval is provided between the adjacent optical lenses 21 and 21, and light interference between the adjacent optical lenses 21 and 21 can be suppressed by this interval.

  The optical lens 21 is made of a translucent material such as acrylic, for example, and is orthogonal to the front-rear direction (the direction of arrows ab in FIG. 1A) as shown in FIGS. A bullet-shaped lens body (convex lens) 21a provided with a convex curved surface that is convex forward in the first direction (the direction of arrow cd in FIG. 1A). In the lens body 21a, there is a convex curved surface that is convex forward in a second direction (in the direction of arrow ef in FIG. 1A) orthogonal to the first direction, and is disposed rearward on both sides thereof. Further, prismatic reflecting portions 21c and 21c for reflecting light from the LED light source 25 forward are integrally provided. Further, on the rear side of each reflecting portion 21c (the lower side in FIG. 1A), a heat radiating hole 21b for releasing heat generated by the LED light source 25 to the outside is provided. Here, the outer surface 21d of each reflecting portion 21c is formed in a curved surface that totally reflects the light incident on the reflecting portion 21c, and as a result, the light leaking from the reflecting portion 21c to the side can be suppressed. it can.

  Further, the lens main body 21a is provided with an incident surface 21j on which light from the LED light source 25 is incident so as to be orthogonal to the front-rear direction when viewed from the first direction. The portions 21c and 21c are symmetrical with respect to the lens body 21a when viewed from the first direction.

  Here, in the present embodiment, as shown in FIG. 4, 16 × 3 rows = 48 LED light sources 25 are mounted on one LED substrate 20 and each LED light source 25 has a corresponding shape. 48 optical lenses 21 are arranged in front. In addition, each optical lens 21 is arrange | positioned so that the left-right direction (arrow ef direction in Fig.1 (a)) may become a longitudinal direction of the LED board 20, respectively.

  Further, as shown in FIG. 5, the LED board 20 is arranged so that the longitudinal direction thereof is the longitudinal direction of the fixture body 1 (the left-right direction in FIG. 5), and the lighting fixture A is as shown in FIG. The instrument body 1 is installed such that the longitudinal direction of the appliance body 1 is the width direction of the road R. That is, the lighting fixture A of this embodiment is installed so that the left-right direction of the optical lens 21 (the direction of the arrow ef in FIG. 1A) is the width direction of the road R.

  Next, the light distribution characteristics of the optical lens 21 will be described in comparison with a conventional optical lens. First, FIG. 2A shows the light distribution characteristics in the first direction of the conventional optical lens (the direction of the arrow cd in FIG. 1A), and FIG. 2B shows the first light distribution characteristic of the conventional optical lens. The light distribution characteristic in the direction 2 (arrow ef direction in FIG. 1A) is shown. According to the conventional optical lens, light can be distributed at a wide angle (about ± 70 °) with respect to the traveling direction of the road R (see FIG. 2A), but the direction orthogonal to the road R (that is, the road) With respect to the width direction of R, a lot of light leaked to the outside from the range of ± 30 ° (see FIG. 2B), and wasted as much (that is, the light irradiated outside the road R) Region a was larger.)

  On the other hand, FIG. 2C shows the light distribution characteristic in the first direction of the optical lens 21 (the direction of the arrow cd in FIG. 1A), and FIG. The light distribution characteristics in the direction (the direction of arrow ef in FIG. 1A) are shown. According to the optical lens 21, the traveling direction of the road R has substantially the same light distribution characteristics as the conventional optical lens (see FIG. 2C), and the direction orthogonal to the road R is ± 30 °. It is possible to reduce light leaking outside from the range. This is because the light toward the outside is reflected forward by the reflecting portions 21c and 21c provided on the optical lens 21, and as a result, the amount of light forward is suppressed while suppressing the amount of light traveling outside the road R. Can be increased.

  FIG. 1B is a cross-sectional view of the optical lens 21 along the first direction (the direction of arrow cd in FIG. 1A). In addition to being totally reflected by the outer surfaces 21d and 21d of 21c and 21c, the light is refracted inward at the exit surface and irradiated forward. Further, FIG. 1C is a cross-sectional view of the optical lens 21 along the second direction (the direction of the arrow ef in FIG. 1A), and the light from the LED light source 25 is distributed at a wide angle. The

  Therefore, by using this optical lens 21, a wide-angle light distribution can be realized in the traveling direction of the road R (see the arrow in FIG. 7A), and a medium-angle light distribution in the width direction orthogonal to the road R. This can be realized (see the arrow in FIG. 7B). Here, when the angle at which a light intensity greater than one-tenth of the maximum light intensity by the LED light source 25 is obtained is θ2, the range of θ2 ≧ 70 ° is a wide angle and the range of 29 ° <θ2 <70 ° is a medium angle, respectively. , Θ2 ≦ 29 ° is called a narrow angle.

  Thus, according to the present embodiment, out of the light emitted from the LED light source 25, the wide-angle light traveling outside the road R can be distributed forward by the reflecting portions 21c and 21c. As a result, it is possible to provide the optical lens 21 in which waste of light is suppressed. That is, the area “a” (area of light irradiated outside the road R) in FIG. 8 can be reduced.

  Further, as in the present embodiment, by combining a plurality of optical lenses 21 to form a lens assembly (lens unit 2 of the present embodiment), light emitted from the plurality of LED light sources 25 can be easily condensed. In addition, the working time can be shortened as compared with the case where the optical lens 21 is individually attached to the LED substrate 20. Furthermore, according to the present embodiment, it is not necessary to add a reflecting plate or the like when controlling the light distribution, and the number of parts can be reduced. Moreover, the lighting fixture A which suppressed the waste of the light irradiated from the LED light source 25 can be provided by using the optical lens 21 or the lens unit 2 like this embodiment.

  In the present embodiment, a road lamp installed along the road R is described as an example of the lighting fixture A. However, the lighting fixture A is not limited to the present embodiment, and as shown in FIG. A security light in which the globe 100 having a light source is disposed in front of the light source may be used. In addition, if the light distribution is wide-angle in the first direction orthogonal to the front-rear direction and the light distribution is narrow to medium-angle light distribution in the second direction orthogonal to the front-rear direction and the first direction, respectively. Other lighting fixtures may be used.

  In this embodiment, the lens unit 2 includes 16 optical lenses 21 arranged in a line. However, the lens unit 2 is limited to the present embodiment as long as the lens unit 2 is an assembly of a plurality of optical lenses 21. For example, the optical lens 21 may be arranged in an annular shape. Further, in the present embodiment, the outer surface 21d is curved so that the light incident on the reflecting portion 21c is totally reflected, but it is sufficient that at least a part of the incident light is reflected. Or a combination of a flat surface and a curved surface.

(Embodiment 2)
Embodiment 2 of an optical lens, a lens unit, and a lighting fixture will be described with reference to FIGS. As shown in FIG. 17A, the lighting apparatus A of the present embodiment is attached to a pole 40 standing on the side of a sidewalk adjacent to the house 100 using an arm 30 and illuminates the sidewalk. Used as The lighting fixture A may be directly attached to the pole 40.

  As shown in FIGS. 14 to 16, the lighting fixture A of the present embodiment includes a fixture main body 1, a globe 13 attached to one side of the fixture main body 1 (lower side in FIG. 14), and an LED. The LED board 20 on which the light source 25 (see FIG. 10) is mounted and the lens unit 2 (see FIG. 12) arranged on one surface of the LED board 20 so as to cover the LED light source 25 are provided. In addition, the lighting fixture A includes an auxiliary reflector 3 that reflects light leaking into the fixture body 1 out of the light emitted from the LED substrate 20 downward (on the sidewalk), and a power supply unit that supplies lighting power to the LED substrate 20. 5. In addition, the arm 30 for attaching the lighting fixture A to the pole 40 is integrally provided on the base end side (left side in FIG. 14) of the fixture body 1.

  The instrument main body 1 is made of a resin molded product formed in an elongated box shape with one surface (the lower surface in FIG. 15A) opened, and a power supply unit 5 is disposed on the proximal end side of the instrument main body 1. An LED substrate 20 is disposed at a substantially central portion of 1. Further, on the side of the LED board 20 (both sides in the left-right direction in FIG. 16A), the auxiliary reflector 3 that reflects downward the light leaking into the fixture body 1 out of the light emitted from the LED board 20. 3 is provided. Further, a heat radiating plate 4 for radiating heat generated by the LED light source 25 mounted on the surface of the LED substrate 20 is attached to the back surface of the LED substrate 20 (upper surface in FIG. 15B). The power supply unit 5 is also provided with a heat radiating plate (not shown) for radiating heat generated by the power supply unit 5.

  Here, FIG. 13 is an external perspective view of the LED substrate 20, and a plurality of LED light sources 25 are mounted along the longitudinal direction on one surface of the LED substrate 20 (upper surface in FIG. 13). The lens unit 2 is arranged so as to cover the surface. The lens unit 2 is attached to the heat radiating plate 4 using the mounting screws 24 together with the LED substrate 20.

  As shown in FIGS. 10B and 10C, the LED light source 25 has a mounting board 25a formed in a rectangular plate shape, and an LED chip (not shown) is provided at the approximate center of the mounting board 25a. Has been implemented. The LED chip mounted on the mounting substrate 25a is molded with the resin layer 25b. The LED light source 25 is mounted on the upper surface of the LED substrate 20 using solder, and the LED chip emits light by the power supplied from the LED substrate 20.

  As shown in FIGS. 12 and 13, the lens unit 2 includes a plurality of (eight in the present embodiment) optical lenses 21 and an attachment member 26 for attaching these optical lenses 21 to the LED substrate 20. It consists of the formed resin molded product. A shielding portion 26a is provided between the adjacent optical lenses 21 and 21 in the mounting member 26, and light interference between the adjacent optical lenses 21 and 21 can be suppressed by the shielding portion 26a.

  The optical lens 21 is made of a translucent material such as acrylic, for example, and is orthogonal to the front-rear direction (the direction of arrows ab in FIG. 10A) as shown in FIGS. 10A to 10C. A bullet-shaped lens body (convex lens) 21a provided with a convex curved surface that is convex forward in the first direction (in the direction of arrow cd in FIG. 10A). On both sides of the lens body 21a in the front-rear direction and in a second direction (arrow ef direction in FIG. 10A) orthogonal to the first direction, there is a rear side (lower side in FIG. 10A). The prism-shaped reflecting portions 21e and 21f for reflecting light from the LED light source 25 arranged in the front are integrally provided. Further, on the rear side of each reflecting portion 21e, 21f (lower side in FIG. 10A), a heat radiating hole 21b for releasing heat generated by the LED light source 25 to the outside (in FIG. 10A, only one side). Are provided). Here, the outer surfaces 21g and 21h of the reflecting portions 21e and 21f are formed into curved surfaces that totally reflect the light incident on the reflecting portions 21e and 21f. As a result, the reflecting surfaces 21e and 21f are side by side. Light that leaks out can be suppressed.

  Further, as shown in FIG. 10B, the lens body 21a has an incident surface 21j on which light from the LED light source 25 is incident when viewed from the first direction (front and rear direction (FIG. 10B). ) In a direction orthogonal to a third direction (indicated by an arrow gh in FIG. 10B) inclined by a predetermined angle θ1. In addition, the shapes of the reflecting parts 21e and 21f viewed from the first direction are asymmetric with respect to the lens body 21a, and the light reflected by the reflecting parts 21e and 21f is in the third direction. Is irradiated. In addition, each optical lens 21 is arrange | positioned so that the left-right direction (arrow ef direction in Fig.10 (a)) may become the longitudinal direction of LED board 20, respectively, and the longitudinal direction of LED board 20 is an instrument. It arrange | positions so that it may become the longitudinal direction (left-right direction in FIG. 14) of the main body 1. FIG.

  Next, the light distribution characteristics of the optical lens 21 will be described with reference to FIG. FIG. 11A shows the light distribution characteristic in the first direction of the optical lens 21 (arrow cd direction in FIG. 10A), and FIG. 11B shows the second direction of the optical lens 21 ( The light distribution characteristics in the direction of arrow ef in FIG. According to this optical lens 21, light can be distributed at a wide angle (about ± 70 °) with respect to the direction of travel of the sidewalk, and the optical axis in the direction orthogonal to the sidewalk (ie, the width direction of the sidewalk). And a third direction (FIG. 10B) inclined by a predetermined angle θ1 with respect to the front-rear direction (the direction of 0 ° in FIG. 11B). ) Is irradiated with the strongest light (in the direction of arrow g-h). This is because the incident surface 21j provided on the lens body 21a of the optical lens 21 is orthogonal to the third direction, and the light reflected by the reflecting portions 21e and 21f is irradiated in the third direction. As a result, the amount of light traveling outside the sidewalk can be suppressed and the amount of light traveling forward can be increased, and light distribution at a predetermined angle (θ1 in this embodiment) is possible. become.

  FIG. 10B is a cross-sectional view of the optical lens 21 taken along the first direction (the direction of the arrow cd in FIG. 10A). In addition to being totally reflected by the outer surfaces 21g and 21h of 21e and 21f, it is refracted inward at the exit surface and irradiated in the third direction (in the direction of arrow g-h in FIG. 10A). Furthermore, the light incident on the incident surface 21j of the lens body 21a is refracted on the exit surface and irradiated in the third direction because the incident surface 21j is orthogonal to the third direction.

  On the other hand, FIG. 10C is a cross-sectional view of the optical lens 21 along the second direction (the direction of the arrow ef in FIG. 10A), and the light emitted from the LED light source 25 is distributed at a wide angle. Lighted.

  Therefore, by using this optical lens 21, a wide-angle light distribution can be realized in the traveling direction of the sidewalk (see the arrow in FIG. 16A), and a light distribution at a predetermined angle can be performed in the width direction orthogonal to the sidewalk. This can be realized (see the arrow in FIG. 16B).

  Here, FIG. 17A is a construction drawing of the lighting fixture A of the present embodiment, and FIG. 17B is a construction drawing of the conventional lighting fixture A. In the conventional lighting fixture A, the optical axis P1 is set in the front-rear direction (arrow ab direction in FIG. 10A). As a result, as shown in FIG. Since the part is irradiated to the house 100, it is not preferable for the residents of the house 100. In addition, the area | region b in FIG.17 (b) is an irradiation area | region of the conventional lighting fixture A. FIG.

  On the other hand, in the lighting fixture A of the present embodiment, the optical axis P2 is set in a third direction (in the direction of arrows gh in FIG. 10B) inclined by a predetermined angle θ1 with respect to the front-rear direction. As a result, as shown in FIG. 17A, all of the irradiation light is irradiated onto the sidewalk, and the house 100 is not irradiated. That is, light distribution in a desired direction is possible by shifting the optical axis of the lighting fixture A. In addition, the area | region c in Fig.17 (a) is an irradiation area | region of the lighting fixture A of this embodiment.

  Thus, according to the present embodiment, the light distribution of the lighting fixture A can be set to a desired angle by inclining the incident surface 21j of the optical lens 21 and changing the direction of the optical axis. Moreover, according to this embodiment, when controlling the light distribution, it is not necessary to add a reflector or the like, and the number of parts can be reduced.

  Further, as in the present embodiment, by combining a plurality of optical lenses 21 into a lens assembly (lens unit 2 of the present embodiment), light emitted from the plurality of LED light sources 25 can be easily condensed. In addition, the working time can be shortened as compared with the case where the optical lens 21 is individually attached to the LED substrate 20.

  Moreover, the illumination fixture A which can set the light distribution of the light irradiated from the LED light source 25 to a desired angle can be provided by using the optical lens 21 or the lens unit 2 like this embodiment. Further, when the incident surface 21j of the optical lens 21 is tilted, the amount of light leaking from one side in the second direction to the outside increases. However, as in the present embodiment, the reflecting portions 21e and 21f By reflecting forward, the amount of light leaking to the outside can be kept low.

  In this embodiment, a sidewalk lamp installed on the side of the sidewalk is described as an example of the lighting fixture A, but the lighting fixture A is not limited to the present embodiment, and has diffusibility as shown in FIG. A security light in which the globe 100 is disposed in front of the light source may be used. In addition, if the light distribution is a wide angle in the first direction orthogonal to the front-rear direction and the light distribution is performed at a desired angle in the second direction orthogonal to the front-rear direction and the first direction, It may be a lighting fixture.

  Further, in the present embodiment, the lens unit 2 is formed by arranging eight optical lenses 21 in one row. However, the lens unit 2 is limited to the present embodiment as long as it is an aggregate of a plurality of optical lenses 21 combined. For example, the optical lens 21 may be arranged in an annular shape. In the present embodiment, the outer surfaces 21g and 21h are curved so that the light incident on the reflecting portions 21e and 21f is totally reflected. However, at least a part of the incident light is reflected. What is necessary is just to combine a plane, a plane, and a curved surface. Furthermore, the inclination angle of the incident surface 21j is not limited to the present embodiment, and may be appropriately set according to the installation environment.

21 Optical lens 21a Lens body (convex lens)
21c Reflector 25 LED light source (light source)

Claims (5)

A convex lens provided with a convex curved surface convex forward in a first direction orthogonal to the front-rear direction;
An optical system characterized in that reflection parts are provided on both sides of the convex lens in the front-rear direction and in the second direction orthogonal to the first direction so as to reflect light from the light source disposed rearward. lens. The convex lens has an incident surface that is orthogonal to the front-rear direction when viewed from the first direction and on which light from the light source is incident;
2. The optical lens according to claim 1, wherein each of the reflection parts has a symmetrical shape with respect to the convex lens when viewed from the first direction. The convex lens has an incident surface that is orthogonal to a third direction inclined at a predetermined angle with respect to the front-rear direction when viewed from the first direction and on which light from the light source is incident. ,
The two reflection parts have an asymmetric shape with respect to the convex lens when viewed from the first direction, and the light reflected by the two reflection parts is irradiated in the third direction. The optical lens according to claim 1. A plurality of the optical lenses according to any one of claims 1 to 3,
A lens unit comprising an assembly formed by combining a plurality of the optical lenses.   A lighting fixture comprising: the optical lens according to claim 1 or the lens unit according to claim 4; and the light source.

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