JP2012064491A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device, in which a plurality of light sources are arranged on a circumference with a designated radius at designated intervals, capable of setting an outline of an irradiation range of the whole lighting device in a circular shape and reducing unevenness of luminance in the irradiation range of the circular shape.SOLUTION: In the lighting device in which the plurality of light sources 1a, 1b, and 1c are arranged on the circumference of a reference circle with a designated radius at designated intervals, a concentric circle of the reference circle larger than the radius of the reference circle is set up as an outer peripheral circle, and a range surrounded by the outer peripheral circle is demarcated as an irradiation range of the lighting device. When paying an attention to one light source (for example, 1a), a range surrounded by a vertical bisector of a line segment connecting between the light source 1a and the light source adjacent to the light source 1a and the outer peripheral circle is demarcated as an irradiation range of the light source 1a, and a reflector 6a for emitting by reflecting the light from the light source 1a is arranged in the surrounding of the light source 1a within the irradiation range of the light source 1a. The reflector 6a has curved surfaces emitting by reflecting the light from the light source 1a in a direction parallel to an optical axis of the light source 1a and corresponding to distances from the light source 1a as reflecting surfaces.

Description

  The present invention relates to a lighting device.

  Conventionally, for example, Patent Document 1 discloses an LED light source device intended to reduce luminance unevenness.

  FIG. 1 is a diagram showing an LED light source device of Patent Document 1. As shown in FIG. Referring to FIG. 1, the LED light source device of Patent Document 1 has a plurality of LEDs 66 arranged in a row, and a paraboloidal surface or a spheroidal reflecting surface 52 is formed for each LED 66. Each of the reflecting surfaces 52 of the reflector 54 is formed such that a part of the rotating paraboloidal surface or the rotating ellipsoidal surface overlaps each other.

  However, in the LED light source device of Patent Document 1, the outline of the irradiation range of the LED light source device by the plurality of LEDs 66 arranged in a row becomes a wave shape as indicated by reference numeral 80 in FIG. There is a problem that the contour cannot be a linear shape as indicated by reference numeral 81 in FIG.

  In the LED light source device of Patent Document 1, a plurality of LEDs are arranged in a row, but conventionally, as shown in FIG. 4, a plurality of light sources (for example, three LEDs) 1a. , 1b, 1c are arranged at predetermined intervals on the circumference of the reference circle 7 having a predetermined radius, if an optical system such as a lens or a reflector is provided for each light source 1a, 1b, 1c, the optical system Therefore, the contour of the irradiation range cannot be the one of the two circular shapes 2 as originally shown in FIG. 6 and 7 show the entire irradiation range when a plurality of light sources (for example, three LEDs) 1a, 1b, and 1c are arranged at predetermined intervals on the circumference of the reference circle 7 having a predetermined radius. An example is shown in which the contour cannot be of a single circular shape. That is, in the example of FIG. 6, since the irradiation ranges 70a, 70b, and 70c of the plurality of light sources 1a, 1b, and 1c do not overlap, the outline of the entire irradiation range has three separate circular shapes 90a, 90b, and 90c, respectively. It will be a thing. In the example of FIG. 7, the irradiation ranges 71a, 71b, and 71c of the plurality of light sources 1a, 1b, and 1c are overlapped. However, the outline of the entire irradiation range is not a circular shape. As indicated by reference numeral 91, it becomes a wavy shape.

JP 2009-110828 A

  The present invention provides a lighting device in which a plurality of light sources are arranged at a predetermined interval on a circumference of a predetermined radius, the outline of the irradiation range of the entire lighting device can be made circular, and irradiation of the entire lighting device can be performed. It aims at providing the illuminating device which can reduce the brightness nonuniformity (illuminance nonuniformity) in the range (within circular irradiation range).

  In order to solve the above-mentioned problem, the invention according to claim 1 is an illumination device in which a plurality of light sources are arranged at predetermined intervals on the circumference of a reference circle having a predetermined radius, and is larger than the radius of the reference circle. A concentric circle of a reference circle is an outer circle, and a range surrounded by the outer circle is defined as an irradiation range of the illumination device. When focusing on one light source, a line segment connecting the light source and the light source adjacent to the light source A range surrounded by a perpendicular bisector and the outer peripheral circle is defined as an irradiation range of the light source, and a reflector that reflects and emits light from the light source is provided around the light source in the irradiation range of the light source. The reflector has a curved surface corresponding to the distance from the light source that reflects light from the light source and emits the light in a direction parallel to the optical axis of the light source. It is characterized by.

  According to a second aspect of the present invention, in the illumination device according to the first aspect, the reflector is divided into a plurality of reflector members, and each reflector member reflects light from the light source and It has a curved surface corresponding to a distance from the light source, which is emitted in a direction parallel to the optical axis, as a reflecting surface.

  According to a third aspect of the present invention, in the illuminating device according to the second aspect, the surface constituting the reflector member is constituted by a minute surface comprising a part of a spherical surface, and the distance from the light source is long. Accordingly, the radius of curvature of the minute surface of the reflector member is increased.

  According to the first to third aspects of the present invention, there is provided an illuminating device in which a plurality of light sources are arranged at predetermined intervals on the circumference of a reference circle having a predetermined radius, and the reference circle larger than the radius of the reference circle. A concentric circle is defined as an outer peripheral circle, and a range surrounded by the outer peripheral circle is defined as an irradiation range of the illumination device. When attention is paid to one light source, a vertical line segment connecting the light source and the light source adjacent to the light source A range surrounded by the equipartition line and the outer peripheral circle is defined as an irradiation range of the light source, and a reflector that reflects and emits light from the light source is provided around the light source in the irradiation range of the light source. The reflector has a curved surface corresponding to the distance from the light source that reflects the light from the light source and emits the light in a direction parallel to the optical axis of the light source. The entire irradiation range of the device has a circular shape. Rukoto can, and can reduce luminance unevenness in the irradiation range of the entire lighting apparatus (in the irradiation range of the circular shape) of the (uneven illuminance).

It is a figure which shows the LED light source device of patent document 1. FIG. It is a figure which shows the irradiation range of the LED light source device of patent document 1. FIG. It is a figure which shows the shape of the ideal irradiation range of the LED light source device by several LED arranged in rows. It is a figure which shows the several light source arrange | positioned on the circumference of the reference | standard circle of a predetermined radius at predetermined intervals. It is a figure which shows the irradiation range of the illuminating device of this invention by which the several light source is arrange | positioned on the circumference of the reference | standard circle of a predetermined radius at predetermined intervals. It is a figure which shows an example of the irradiation range of the conventional illuminating device by which the several light source is arrange | positioned on the circumference of the reference | standard circle of a predetermined radius at predetermined intervals. It is a figure which shows the other example of the irradiation range of the conventional illuminating device by which the several light source is arrange | positioned on the circumference of the reference | standard circle of a predetermined radius at predetermined intervals. It is a figure for demonstrating the illuminating device which concerns on this invention. It is a figure for demonstrating the illuminating device which concerns on this invention. It is a figure which shows an example of the setting method of the outer periphery circle as a concentric circle of a reference | standard circle larger than the radius of a reference | standard circle. It is a figure which shows the other example of the setting method of the outer periphery circle as a concentric circle of the reference | standard circle larger than the radius of a reference | standard circle. It is a figure which shows the other example of the setting method of the outer periphery circle as a concentric circle of the reference | standard circle larger than the radius of a reference | standard circle. It is a perspective view which shows the structural example of the illuminating device of this invention. FIG. 14 is a plan view of FIG. 13. It is a figure which shows two types of paraboloids (parabolas) from which a focal distance differs. It is sectional drawing of FIG. It is a figure which shows the optical path of the light radiate | emitted from a light source in the illuminating device of the example of FIG. 13, FIG. It is a figure which shows an example in which the curvature radius of the micro surface of a reflector member is large as the distance from a light source becomes far. It is a figure which shows a white LED light source. It is a figure for demonstrating the size and shape (angle and curvature of a reflective surface) of a reflector member in setting it as an illuminating device with high light utilization efficiency.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  8 and 9 are diagrams for explaining a lighting device according to the present invention.

  Referring to FIG. 8, the illuminating device of the present invention is an illuminating device in which a plurality (three in the example of FIG. 8) of light sources 1a, 1b, 1c are arranged at a predetermined interval on the circumference of a reference circle 7 having a predetermined radius. In this case, a concentric circle 2 of the reference circle 7 larger than the radius of the reference circle 7 is defined as an outer circle, and a range surrounded by the outer circle 2 (the same as the outline 2 of the irradiation range shown in FIG. 5) (FIG. 5). 9 is defined as the illumination range of the lighting device, and when attention is paid to one light source (for example, 1a), as shown in FIG. 9, the light source 1a and the light sources 1b and 1c adjacent to the light source 1a A range (a hatched range in FIG. 9) 4a surrounded by the perpendicular bisectors 3a and 3b and the outer peripheral circle 2 connecting the line 2 is defined as an irradiation range of the light source 1a. Similarly, when focusing on the light source 1b, a range 4b surrounded by the perpendicular bisectors 3b and 3c connecting the light source 1b and the light sources 1a and 1c adjacent to the light source 1b and the outer circumferential circle 2 Is defined as the irradiation range of the light source 1b. When attention is paid to the light source 1c, a range 4c surrounded by the vertical bisectors 3c, 3a connecting the light source 1c and the light sources 1b, 1a adjacent to the light source 1c and the outer circumference circle 2 is It is defined as an irradiation range of the light source 1c.

  In addition, the outer periphery circle | round | yen 2 as a concentric circle of the reference | standard circle 7 larger than the radius of the reference | standard circle 7 is set by either of the methods shown in FIG. 10, FIG. 11, FIG.

  That is, in the method of FIG. 10, the outer peripheral circle 2 as the concentric circle of the reference circle 7 larger than the radius of the reference circle 7 is replaced with the circles 5 a, 5 b, 5 c having the same radius around the light sources 1 a, 1 b, 1 c. When setting so as not to contact the circles of the light sources adjacent to each other, it is set as an outer peripheral circle circumscribing each circle 5a, 5b, 5c of each of the set light sources 1a, 1b, 1c.

  Further, in the method of FIG. 11, the outer circumference circle 2 as a concentric circle of the reference circle 7 larger than the radius of the reference circle 7 is replaced with circles 5a, 5b, 5c having the same radius around the light sources 1a, 1b, 1c. When set so as to be in contact with the circles of light sources adjacent to each other, they are set as outer circles circumscribing the circles 5a, 5b, 5c of the set light sources 1a, 1b, 1c.

  Further, in the method of FIG. 12, the outer circumference circle 2 as a concentric circle of the reference circle 7 larger than the radius of the reference circle 7 is replaced with circles 5a, 5b, 5c having the same radius around the light sources 1a, 1b, 1c. When the light source circles adjacent to each other are set so as to partially overlap, they are set as outer circles circumscribing the circles 5a, 5b, 5c of the set light sources 1a, 1b, 1c.

  As described above, the outer circumference circle 2 as the concentric circle of the reference circle 7 larger than the radius of the reference circle 7 can be set by any of the methods shown in FIGS. 10, 11, and 12, as will be described later. In addition, in the irradiation ranges 4a, 4b, and 4c of the light sources 1a, 1b, and 1c, the structure and design of the reflectors disposed around the light sources 1a, 1b, and 1c are not complicated, and the outer circle 2 is surrounded. In order to reduce the luminance unevenness (illuminance unevenness) in the irradiation range 4 of the illumination device, the method shown in FIGS. 11 and 12, that is, the circles 5 a, 5 b, 5 c having the same radius with the light sources 1 a, 1 b, 1 c as the centers. It is preferable to make a setting so that the circles of the light sources adjacent to each other are in contact with each other or are partially overlapped.

  In the illumination device of the present invention, in each irradiation range 4a, 4b, 4c of each light source 1a, 1b, 1c surrounded by the outer circumference circle 2, as shown in a perspective view in FIG. 13, for example, each light source 1a, 1b, Around 1c, reflectors 6a, 6b, and 6c that reflect and emit light from the light sources 1a, 1b, and 1c (in this embodiment, parabolic reflectors having a parabolic surface as a reflecting surface) are provided. Each of the reflectors (parabolic reflectors) 6a, 6b, 6c is designed so that the focal length of the paraboloid increases as the distance from the light sources 1a, 1b, 1c increases.

  In the example of FIG. 13, each of the reflectors 6a, 6b, 6c is divided into a plurality of reflector members (parabolic reflector members) having a parabolic surface having a predetermined focal length as a reflecting surface.

  FIG. 14 is a plan view of FIG. 13. In FIG. 14, each reflector (parabolic reflector) 6a, 6b, 6c is divided into a plurality of reflector members having a paraboloid having a predetermined focal length as a reflecting surface. It is shown in detail. Referring to FIG. 14, when attention is paid to the reflector 6a for one light source (for example, 1a), the reflector 6a has a plurality of reflector members 6 each having a paraboloid having a predetermined focal length as a reflecting surface at a certain angle. ,..., 6-n,..., And a reflector member (for example, 6-n) at a distance far from the light source 1a is a reflector member (for example, 6-n) at a distance from the light source 1a. The focal length of the paraboloid is larger than in 1).

  FIG. 15 shows two types of paraboloids (parabolas) K- 1 and Kn having different focal lengths. The paraboloid (parabola) K- 1 has a focal length F <b> 1 with respect to the light source 1. The paraboloid (parabola) K-n has a focal length Fn with respect to the light source 1, and the focal length Fn of the paraboloid (parabola) K-n is a parabola (parabola) K-1. Is larger than the focal length F1.

  Accordingly, a reflector member (for example, 6-1) located at a short distance from the light source 1a has, for example, a reflecting surface of a paraboloid K-1 having a focal length F1 (for example, a conventional one as shown in FIGS. 6 and 7). A reflector having the same focal length as that of the reflector used in the illuminating device), and a reflector member (for example, 6-n) at a distance far from the light source 1a, for example, a parabolic surface K- having a focal length of Fn. The focal length of the reflector member between the reflector member 6-1 and the reflector member 6-n becomes larger as the reflector member 6-1 approaches the reflector member 6-n (focal length). By having a parabolic reflecting surface (having a focal length between F1 and the focal length Fn), a reflector member at a distance far from the light source 1a can be placed close to the light source 1a. Focal length than the reflector member can be those having a reflecting surface of the parabolic surface having a larger shape.

  16A is a cross-sectional view taken along the line AA in FIG. 14, and FIG. 16B is a cross-sectional view taken along the line BB in FIG. 14. The distance from the light source 1a to FIG. The reflector member 6-1 in FIG. 16 has, for example, a parabolic surface (parabolic line) K-1 having a focal length F1, and the reflector member 6-n located far from the light source 1a from FIG. 16B. However, it can be seen that, for example, it has a paraboloid (parabola) K-n of the focal length Fn.

  In the example of FIGS. 13 and 14, the circles 5 a, 5 b, 5 c having the same radius centered on the light sources 1 a, 1 b, 1 c are shown in FIG. The reflector member is designed in such a manner that it overlaps, and in this case, the reflector member exists only until a part of the circles of the light sources adjacent to each other overlap. That is, as shown in FIG. 16 (a), the reflector member 6-1 for the light source 1a collides with the reflector member for the light source 1c at the position 3a where the circle 5a and the circle 5c overlap. Only exists so far.

  FIG. 17 shows an optical path of light emitted from the light source 1a in the illumination devices of the examples of FIGS. In the example of FIG. 17, the reflector member 6-1 reflects a paraboloid (a paraboloid K-1 having a focal length F1) that reflects light from the light source 1a and emits the light in a direction parallel to the optical axis of the light source. Have. Although not shown, the reflector member 6-n located at a distance farther than the reflector member 6-1 with respect to the light source 1a reflects the light from the light source 1a and emits it in a direction parallel to the optical axis of the light source. A paraboloid (a paraboloid K-n having a focal length Fn).

  In other words, in the present invention, when focusing on one light source (for example, 1a), the reflector 6a disposed around the light source 1a reflects the light from the light source 1a in the irradiation range 4a of the light source 1a. Then, a curved surface (in this embodiment, a parabolic surface) that is emitted in a direction parallel to the optical axis of the light source 1a and corresponding to the distance from the light source 1a is provided as a reflecting surface.

  When the reflector 6a is divided into a plurality of reflector members 6-1, ..., 6-n, ..., each reflector member 6-1, ..., 6-n, ... A curved surface according to the distance from the light source 1a that reflects light from the light source 1a and emits it in a direction parallel to the optical axis of the light source 1a (in this embodiment, a parabolic surface K-1,... ., K−n,...) As reflection surfaces.

  Thus, in the illumination device of the present invention, a plurality of light sources are arranged at predetermined intervals on the circumference of a reference circle having a predetermined radius, and concentric circles of the reference circle larger than the radius of the reference circle are provided. An outer circumference circle, and a range surrounded by the outer circumference circle is defined as an illumination range of the illumination device, and when focusing on one light source, a perpendicular bisector connecting a line segment connecting the light source and the light source adjacent to the light source And a range surrounded by the outer peripheral circle is defined as an irradiation range of the light source, and in the irradiation range of the light source, a reflector that reflects and emits light from the light source around the light source (in this embodiment, A parabolic reflector having a parabolic surface as a reflecting surface is provided, and the focal length of the parabolic surface increases as the distance from the light source increases (in a broader sense, The reflector is from the light source Because the reflection surface has a curved surface corresponding to the distance from the light source that reflects light and emits it in a direction parallel to the optical axis of the light source, the outline of the irradiation range of the entire illumination device is circular In addition, it is possible to reduce luminance unevenness (illuminance unevenness) within the irradiation range of the entire illumination device (within the circular irradiation range).

  Further, in the above-described illumination device of the present invention, the surface constituting the reflector member is constituted by a minute surface made of a part of a spherical surface, and the minute surface of the reflector member 6 is increased as the distance from the light source increases. It is also possible to increase the curvature radius of.

  In FIG. 18, as the distance from the light source 1 (for example, the light source 1a) increases, the reflector member 6 (the reflector members 6-1,..., 6-n,. An example in which the radius of curvature of the smooth surface 9 is increased is shown.

  As described above, as the distance from the light source 1 (for example, the light source 1a) increases, the reflector member 6 (the reflector members 6-1 to 6-n corresponding to the light source 1a) becomes minute. Since the curvature radius of the surface 9 is increased, color unevenness can be further reduced, and brightness unevenness (illuminance unevenness) can be further reduced.

  That is, FIG. 19 shows a white LED light source as the light source 1. In general, the white LED light source 1 has white light in the optical axis direction among the optical characteristics of the white LED light source 1. As the light with an angle close to orthogonal to the optical axis has a longer optical path length through the phosphor of the package, it becomes light near yellow, and as it is, white light and light close to yellow Color unevenness may occur. In order to prevent this, by reducing the radius of curvature of the minute surface reflected by the reflector member 6, light is scattered within a certain range, from white light in the optical axis direction to light close to yellow that is orthogonal to the light. The inventors of the present application have found that the problem of color unevenness can be reduced by mixing together. In order to further bring out the effect of reducing the problem of color unevenness, as shown in FIG. 18, as the distance from the light source 1 (for example, the light source 1a) increases, the reflector member 6 (each reflector member 6 corresponding to the light source 1a). The inventors of the present application have further found that it is suitable to make the curvature radius of the minute surface 9 of (−1,..., 6-n,. As described above, as the distance from the light source 1 (for example, the light source 1a) increases, the reflector member 6 (the reflector members 6-1 to 6-n corresponding to the light source 1a) becomes minute. By increasing the radius of curvature of the surface 9, color unevenness can be effectively reduced, and brightness unevenness (illuminance unevenness) can be further reduced.

  Further, it is preferable that the light reflected by a certain reflector member is emitted without being reflected again by this reflector member or another reflector member, in order to obtain a lighting device with high light utilization efficiency. The size, shape (reflecting surface angle and curvature) of 6 is preferably designed in consideration of this. FIG. 20 shows that light reflected by a certain reflector member is emitted without being reflected again by this reflector member or another reflector member (specifically, the reflector member 6 Even if the light hitting the root is reflected at an angle θ with respect to the optical axis, it does not hit the reflector member 6 or another reflector member 6, size (X 1, X 2, Y), shape (of the reflecting surface) An example of a reflector member 6 with a designed angle and curvature is shown. The example of FIG. 20 is designed in the manner shown in FIG. 11, that is, the circles 5a, 5b, and 5c having the same radius centered on the light sources 1a, 1b, and 1c are in contact with the adjacent light source circles. It has been made. By using such a reflector member 6, it is possible to reduce the problem of color unevenness in the LED light source for improving the illuminance and the problem of multiple shadows.

  In each example described above, the number of the plurality of light sources arranged at predetermined intervals on the circumference of the reference circle 7 having a predetermined radius is three. However, the light sources are arranged at predetermined intervals on the circumference of the reference circle 7 having a predetermined radius. The number of the plurality of light sources may be two, or three or more.

  Moreover, in each example mentioned above, although the reflector (for example, 6a) was divided | segmented into several reflector member 6-1, ..., 6-n, ..., a reflector (for example, 6a), It is also possible to configure with a single undivided member (as a single reflector).

  In each example described above, it has been described that the reflectors 6a, 6b, and 6c are parabolic reflectors having a parabolic surface as a reflecting surface, and the reflector member 6 is a parabolic reflector member. 6b, 6c, the reflector member 6 has a curved surface corresponding to the distance from the light source that reflects light from the light source and emits it in a direction parallel to the optical axis of the light source as a reflection surface. If there is, it is not limited to a parabolic one. For example, the reflectors 6a, 6b, 6c, and the reflector member 6 may be reflectors or reflector members having, as a reflection surface, a curved surface based on a paraboloid instead of a paraboloid.

  In other words, the present invention is an illumination device in which a plurality of light sources are arranged at predetermined intervals on the circumference of a reference circle having a predetermined radius, and a concentric circle of the reference circle larger than the radius of the reference circle is defined as an outer circumference circle. A range surrounded by the outer circumference circle is defined as an illumination range of the illumination device, and when focusing on one light source, a perpendicular bisector connecting the light source and a light source adjacent to the light source and the outer circumference A range surrounded by a circle is defined as an irradiation range of the light source, and a reflector having a predetermined curved reflection surface that reflects and emits light from the light source is provided around the light source in the irradiation range of the light source. The reflector is characterized in that the focal length of the predetermined curved surface increases as the distance from the light source increases.

  Further, according to the present invention, the reflector is divided into a plurality of reflector members having a predetermined curved reflection surface with a predetermined focal length, and the reflector member that is far from the light source is close to the light source. The focal length of the predetermined curved surface is larger than that of the reflector member.

  More broadly, the present invention is an illumination device in which a plurality of light sources are arranged at predetermined intervals on the circumference of a reference circle having a predetermined radius, and a concentric circle of the reference circle larger than the radius of the reference circle is an outer circumference circle. A range surrounded by the outer circumference circle is defined as an irradiation range of the illumination device, and when focusing on one light source, a perpendicular bisector connecting a line segment connecting the light source and the light source adjacent to the light source, and A range surrounded by the outer peripheral circle is defined as an irradiation range of the light source, and a reflector that reflects and emits light from the light source is provided around the light source in the irradiation range of the light source. Has a curved surface corresponding to the distance from the light source, which reflects light from the light source and emits it in a direction parallel to the optical axis of the light source, as a reflection surface.

  Further, according to the present invention, the reflector is divided into a plurality of reflector members, and each reflector member reflects light from the light source and emits it in a direction parallel to the optical axis of the light source. It is characterized by having a curved surface corresponding to the distance as a reflecting surface.

  Thus, even if the reflectors 6a, 6b, 6c and the reflector member 6 are not parabolic, the light from the light source is reflected and emitted in a direction parallel to the optical axis of the light source. As long as it has a curved surface corresponding to the distance as a reflecting surface, the above configuration of the present invention makes it possible to make the contour of the irradiation range of the entire lighting device circular, and the lighting device An effect of reducing luminance unevenness (illuminance unevenness) within the entire irradiation range (within the circular irradiation range) is obtained.

  The present invention can be used for general lighting, automobile lighting, and the like.

1a, 1b, 1c Light source 2 Peripheral circle (contour of irradiation range)
3a, 3b, 3c Vertical bisector 4a, 4b, 4c Irradiation range of each light source 6a, 6b, 6c Reflector 7 Reference circle 9 Minute surface

Claims (3)

  A lighting device in which a plurality of light sources are arranged at a predetermined interval on the circumference of a reference circle having a predetermined radius, and a concentric circle of the reference circle that is larger than the radius of the reference circle is defined as an outer circle, and a range surrounded by the outer circle Is defined as the illumination range of the illumination device, and when focusing on one light source, a range surrounded by a perpendicular bisector connecting the light source and a light source adjacent to the light source and the outer circumference circle is A light source is defined as an irradiation range, and a reflector that reflects and emits light from the light source is provided around the light source in the light source irradiation range, and the reflector reflects light from the light source. Then, the illumination apparatus has a curved surface corresponding to a distance from the light source, which is emitted in a direction parallel to the optical axis of the light source, as a reflection surface.   The lighting device according to claim 1, wherein the reflector is divided into a plurality of reflector members, and each reflector member reflects light from the light source and emits it in a direction parallel to the optical axis of the light source. An illumination device having a curved surface corresponding to a distance from the light source as a reflection surface.   3. The lighting device according to claim 2, wherein the surface constituting the reflector member is a minute surface formed of a part of a spherical surface, and the minute surface of the reflector member is increased as the distance from the light source is increased. A lighting device characterized by having a large curvature radius.

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