TWI768136B - lighting machine - Google Patents

Abstract

The lighting device of the present invention is shifted further forward than directly below the lighting head without adjusting the direction of the lighting head. The illumination head 4 includes a light source 5 , a reflector 6 and a lens diffuser 7 . In the inner space defined by the curved shape of the reflector 6 , the light sources 5 are arranged so as to face the reflector 6 . The optical axis A of the light emitted from the light source 5 faces the vertical direction when the illumination head 4 faces directly downward. The reflector 6 has an asymmetrical curved surface shape with respect to the optical axis A, and the irradiation area formed on the irradiation surface in the state where the illuminating head 4 faces directly downward is offset in a predetermined direction with respect to the directly downward direction of the illuminating head 4 . The reflected light reflected by the outgoing light is guided to a predetermined direction in a way of shifting. The lens diffuser 7 is attached to the opening of the reflector 6 and diffuses the reflected light so that the light intensity in the irradiation area becomes uniform.

Description

lighting machine

The present invention relates to an illuminating device including an illuminating head, and more particularly, to a reflection structure for light emitted from a light source.

Conventionally, there has been known an illumination device including an illumination head. For example, Patent Document 1 discloses a lighting fixture including an LED (Light Emitting Diode) mounting board, a housing, and an LED board support plate. LED elements that project short-wavelength light are mounted on the LED mounting substrate. The frame has a reflective surface, and the reflective surface is provided with a wavelength conversion portion that emits converted light in the recessed portion by the short-wavelength light of the LED element. The LED substrate support plate is attached to the inner side of the opening edge portion of the frame body, and the inner side surface is arranged to face the bottom surface of the concave portion. An LED mounting board is mounted on the LED board support plate with the light emitting surface of the LED element facing the bottom surface of the concave portion of the reflecting surface. In addition, it is described that the outline (image) of the light source of the LED element cannot be directly seen.

Patent Document 2 discloses a lamp provided with a plurality of LEDs that are vertically arranged with an interval in the longitudinal direction of the lamp using an LED carrier. Each LED is pre-wired around the center of the light. A defined solid angle area emits light. The solid angle area is directed toward the lamp reflector for indirect light emission of the lamp. The number of LEDs and/or the spacing of the LEDs is selected in such a way that the solid angle area of all the LEDs overlaps at least partially after the illumination surface distances are at least partially overlapped from the bottom surface of the lamp. At least 0.2 to 2.5 times the distance between the LEDs apart.

Patent Document 3 discloses a lighting device that can efficiently utilize light from a light source for lighting. The aforementioned lighting device includes a ring-shaped light source and a reflection member. The reflection surface of the reflection member is a concave curved surface formed in space by winding a curve formed by a part of an ellipse having two foci around the center axis. The positional relationship between each LED and the reflective surface is determined in such a way that all the light within the effective light distribution angle of the optical axis of each LED including the ring light source touches the reflective surface, and makes the light emitted from the ring light source. Each LED and the light reflected by the reflection surface are irradiated to the irradiation surface.

[Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2007-300138.

Patent Document 2: Japanese Patent Application Publication No. 2015-511017.

Patent Document 3: Japanese Patent Laid-Open No. 2017-133984.

In the conventional lighting equipment, in the state where the lighting head is facing directly downward Below, the irradiation area formed on the irradiation surface by the irradiation of light is located directly below the illuminating head. However, depending on the usage of the user, it is usually easier to use if the irradiation area is not located directly below the illumination head but rather further forward (in front) of the illumination head. In this case, for example, it is assumed that the user's line of sight to read a book or the like that has been placed in the irradiation area may be blocked by the illuminating head or the like. In such a situation, it can be dealt with by adjusting the direction of the illuminating head obliquely forward, but the originally approximately circular irradiated area will be deformed into an elliptical shape, and not only the edge part of the irradiated area will flow, but the boundary will become blurred, and at the most In bad conditions, the user may look directly at the light source.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to form an irradiation area shifted further forward than directly below the illuminating head without adjusting the direction of the illuminating head.

In order to solve the above-mentioned problems, the first invention provides an illumination device including a setting table, an illumination head, and an arm. The arm is connected to the installation table and the illumination head. The lighting head has: a first sub-light source, a second sub-light source, a first reflecting plate and a second reflecting plate. The second sub-light source is disposed further forward than the first sub-light source. The first reflector has a curved shape that is asymmetric with respect to the optical axis of the light emitted from the first sub-light source, and is used to illuminate The reflected light reflected from the light emitted from the first sub-light source is guided in a predetermined direction so that the first irradiation area formed on the irradiation surface with the head facing directly downward is shifted further forward with respect to directly below the illuminating head. The second reflector is disposed further forward than the first reflector, and has a curved shape that is asymmetric with respect to the optical axis of the light emitted from the second sub-light source, and the illuminating head faces directly below. The reflected light reflected from the light emitted from the second sub-light source is guided in such a manner that the second irradiation area formed on the irradiation surface in the state is shifted further forward with respect to directly below the illuminating head and overlaps at least a part of the first irradiation area to the predetermined direction.

The second invention provides a lighting apparatus including at least a lighting head. The lighting head has: a first sub-light source, a second sub-light source, a first reflecting plate and a second reflecting plate. The second sub-light source is disposed further forward than the first sub-light source. The first reflector has a curved shape that is asymmetric with respect to the optical axis of the light emitted from the first sub-light source, and the first illumination area formed on the illumination surface with the illumination head facing directly downward is opposite to the illumination head. The reflected light reflected from the light emitted from the first sub-light source is guided to a predetermined direction so that the lower part is shifted further forward. The second reflector is disposed further forward than the first reflector, has a curved shape that is asymmetric with respect to the optical axis of the light emitted from the second sub-light source, and has the illumination head facing directly downward The reflected light reflected from the light emitted from the second sub-light source is guided in such a way that the second irradiation area formed on the irradiation surface is further shifted forward with respect to directly below the illuminating head and overlaps with at least a part of the first irradiation area. to the predetermined direction.

Here, in the first invention or the second invention, it is preferable that the inclination of the optical axis in the second sub-light source relative to the vertical direction is greater than the inclination of the optical axis in the first sub-light source relative to the vertical direction. In addition, a first sub-light source can also be arranged in the front center of the lighting head, and two second sub-light sources can also be arranged at the rear, left and right of the lighting head. In addition, a lens diffusion plate may be further provided, which is arranged on the optical axis of the reflected light and diffuses the reflected light at a fixed angle. In this case, in the state where the lens diffuser plate has been removed, it is preferable that at least a part of the first irradiation area and the second irradiation area overlap each other. In addition, as the reflection characteristics of the front edge portions of the first reflector and the second reflector, it is preferable to reflect the reflected light so that the ray angle of the reflected light relative to the vertical direction gradually decreases toward the front edge portions. In addition, the asymmetric curved surface shapes of the first reflection plate and the second reflection plate may have a cross-sectional shape inclined parabolically with respect to the optical axis of the light emitted from the first sub-light source and the second sub-light source.

According to the present invention, a reflection plate can be provided for each sub-light source, and the reflected light can be guided to a predetermined direction by each reflection plate. By combining a plurality of optical systems in this way, it is possible to overlap at least a part of the irradiation area while shifting the irradiation area formed on the irradiation surface with respect to directly below the illuminating head.

1: Lighting machine

2: Setup Desk

3: Arm

4: Lighting head

5: Light source

5a to 5d: Sub-light sources

6, 6a to 6e: Reflector

7: Lens diffuser

8: Rotary axis

A: Optical axis

B: Focus

C: Focus axis

D: Irradiated area

H: horizontal line

theta, theta 1, theta 2: angle

Figure 1 is a front view of the lighting machine.

Figure 2 is a side view of the lighting machine.

Fig. 3 is a cross-sectional view of the optical system of the first embodiment.

FIG. 4 is an explanatory diagram of a reflection structure.

FIG. 5 is an explanatory diagram of a reflection structure.

FIG. 6 is an explanatory diagram of a reflection structure.

FIG. 7 is an explanatory diagram of a reflection structure.

FIG. 8 is an explanatory diagram of an irradiation area formed by light from an illumination head.

FIG. 9 is a schematic diagram showing the light intensity distribution of the irradiated area.

10 is a cross-sectional view of an optical system with an adjustment mechanism.

FIG. 11 is a plan view showing the arrangement of the optical system of the second embodiment.

FIG. 12 is a cross-sectional view of the optical system on the left and right sides.

FIG. 13 is a cross-sectional view of the optical system in the center.

FIG. 14 is a schematic diagram showing the light intensity distribution of the irradiation area of each light source before diffusion.

FIG. 15 is a schematic diagram showing the light intensity distribution of the irradiation area of the synthetic light source before diffusion.

FIG. 16 is a schematic diagram showing the light intensity distribution of the irradiated area after diffusion.

Fig. 17 is a plan view of the optical system of the third embodiment.

18 is an explanatory diagram of an optical system according to a modification of the third embodiment.

FIG. 19 is a schematic diagram showing the light intensity distribution of the irradiated area before diffusion.

FIG. 20 is a schematic diagram showing the light intensity distribution of the irradiated area after diffusion.

(first embodiment)

FIG. 1 is a front view of the lighting apparatus of this embodiment. Fig. 2 is a side view of the aforementioned lighting apparatus. This lighting apparatus 1 is used as a desk stand, and is structured on the theme of an installation stand 2 , an arm 3 , and a lighting head 4 . The installation table 2 has a substantially cylindrical shape, and is placed on an installation surface such as a table. One end of the arm 3 is attached to the upper part of the installation table 2 and extends toward the upper part of the installation table 2 . The lighting head 4 is attached to the other end of the arm 3 at the rear. The direction of the lighting head 4 can be adjusted arbitrarily. In the same figure, the illumination head 4 is shown to be facing slightly forward, but the angle θ formed by the illumination head 4 with respect to the horizontal line H is 0 degrees (θ=0), and the state is directly downward. In addition, in the following description, the front-rear direction of the lighting device 1 is referred to as the "X direction", and the left-right direction of the lighting device 1 is referred to as the "Y direction". The opposite direction of the 3 sides is defined as "forward".

FIG. 3 is a cross-sectional view of the optical system built in the illumination head 4 . The aforementioned optical system includes a light source 5 , a reflection plate 6 and a lens diffusion plate 7 . The light source 5 is constituted by a single light-emitting unit, the single light-emitting unit is equipped with a One or a plurality of LEDs belonging to the light-emitting body, and the light source 5 is arranged so as to face the reflector 6 in the inner space defined by the curved shape of the reflector 6 . In the present embodiment, the light source 5 is arranged so that the optical axis A of the light emitted from the light source 5 faces the vertical direction in a state where the illumination head 4 faces directly downward (θ=0). Furthermore, as will be described later, the light source 5 may be a plurality of light sources in which a plurality of light-emitting units are combined.

The reflection plate 6 reflects the light emitted in the direction of the optical axis A from the light source 5 downward. Although the reflection plate 6 has a curved shape that is bilaterally symmetrical with respect to the optical axis A of the light emitted from the light source 5 in the left-right direction (Y direction), in the front-rear direction (X direction), as shown in FIG. Asymmetric surface shape before and after optical axis A. Thereby, the reflected light reflected by the reflection plate 6 is not guided directly below the illumination head 4, but is guided further forward directly below.

In addition, the inclination and the position of the light source 5 are not limited to FIG. 3, It can be suitably determined according to the actual product specification, such as the height of a desk lamp. For example, when the light source 5 is inclined forward, the light emitted from the illumination head 4 can be guided further forward, and when the light source 5 is inclined backward, the opposite is true. In addition, when the light source 5 is close to the reflection plate 6, the irradiation area of the light is diffused, and when the light source 5 is far away from the reflection plate 6, the opposite is true.

Hereinafter, the reflection structure of the present embodiment will be described in detail with reference to FIGS. 4 to 7 . In this embodiment, it is used as an example of the reflector 6 The cross section in the front-rear direction is a parabolic reflector. Specifically, the reference plane (the first term on the right) is classified into spherical (k=0), ellipsoidal (-1<k) by the value of k using the aspherical mathematical formula shown below. <0), paraboloid (k=-1), hyperboloid (k<-1). In the present embodiment, as an example, k=-1, r=30, and h=54.772 are set.

First, think about the parabola shown in Figure 4. When light is emitted upward from the focal point B of the parabola, the reflected light reflected by the reflection plate 6 is emitted directly downward as parallel light. Thereby, a substantially circular irradiation area (light field) is formed on the irradiation surface.

Next, as shown in FIG. 5 , consider a situation where the light source 5 is brought close to the reflector 6 side from the position of the focal point B, and the optical axis A is inclined by a predetermined angle (for example, 30 degrees) with respect to the focal axis C of the reflector 5 . . Thereby, the outgoing direction of the reflected light is also inclined, so that it is guided obliquely forward rather than directly below the illumination head 4 . The irradiated area formed on the irradiated surface is larger than the state of FIG. 4 and has a three-sun moon shape. In addition, by approaching the light source 5, the reflection is Light is no longer directional light.

Next, as shown in FIG. 6 , the inclination of the reflector 6 is restored so that the light source 5 faces directly upward, and a part of the reflector 6 , that is, a portion lower than the light source 5 is cut along the horizontal line H. Thereby, as shown in FIG. 7 , in the state where the reflector 6 (illumination head 4 ) faces directly downward, the reflected light from the illumination head 4 (reflector 6 ) is guided obliquely forward.

Furthermore, the cross-sectional shape of the reflector 6 is preferably an aspherical shape (parabolic shape), but is not limited to this, and any shape may be employed as long as the reflected light can be guided obliquely forward.

The lens diffuser 7 is provided on the optical axis of the reflected light emitted from the reflection plate 6 , and diffuses the reflected light so that the light intensity of the irradiation area D becomes uniform. The lens diffuser plate 7 is also called LSD (light Shaping Diffusers; light shaping diffuser) diffuser plate, which forms fine concavo-convex on the surface of the film, and the incident light is fixed by the refraction/diffraction effect of the concave-convex structure. angular spread.

FIG. 8 is an explanatory diagram of an irradiation area formed by light emitted from the illumination head 4 . In the state in which the illumination head 4 is already facing directly downward, the reflected light from the reflector 6 is emitted in a straight line obliquely forward. Although this reflected light is diffused when passing through the lens diffuser plate 7 , the forward linearity is maintained due to its characteristics. Thereby, it is offset further forward with respect to directly below the illuminating head 4 Thus, the irradiation area D (light field) is formed. In other words, in the X direction, the center of the irradiation area D is positioned outside the front end (front edge portion) of the illumination head 4 .

FIG. 9 shows the light intensity distribution of the irradiation area D in the state where the lens diffuser plate 7 is not sandwiched. In FIG. 9 , the area displayed with lighter color (white) has higher display light intensity, and the area displayed with darker color (black) has lower display light intensity. In the light intensity distribution shown in the same figure, the missing part in the lower part is the influence of the stage supporting the light source 5 . By interposing the lens diffuser plate 7, the irradiation area D has a substantially circular and uniform intensity distribution.

In addition, the intersection angle θ of the reflected light emitted from the reflecting plate 6 which is the reflection characteristic of the reflecting plate 6 in the edge portion on the front side, that is, as shown in FIG. The angle formed by the directions is preferably reflected in such a manner that the edge portion gradually decreases toward the front side. As described above, this type of non-parallel light system is realized by inclining the light source 5 from the position of the focal point B to the side of the reflection plate 6 . Thereby, the blurring of the boundary caused by the flow of the irradiation area (Spot light; spotlight) formed on the irradiation surface to the front can be effectively prevented.

As described above, according to the present embodiment, by guiding the reflected light reflected by the reflection plate 6 to the front, the irradiation area D formed on the irradiation surface can be shifted further forward than directly below the illumination head 4 . Thereby, even if the direction of the illumination head 4 is not adjusted, the user can be effectively prevented from reading the place in the illumination A situation in which the view of a book or the like directly below the head 4 is blocked by the illuminating head 4 . Moreover, since the direction of the illumination head 4 is only required to be maintained in the directly downward state, the irradiation area D becomes the original substantially circular clear shape, and it is difficult for the user to look directly at the light source 5 .

Furthermore, according to the present embodiment, the reflection characteristics of the front edge portion of the reflector plate 6 are reflected such that the ray angle θ of the reflected light relative to the vertical direction gradually decreases toward the front edge portion. Thereby, the blurring of the boundary caused by the flow of the irradiation area D formed on the irradiation surface to the front can be effectively prevented.

Furthermore, the typical so-called state where the illumination head faces directly downward is shown in FIG. 8 , which means that the lower surface of the illumination head 4 (the surface of the lens diffuser 7 in FIG. 3 ) or the plane constituting the light source 5 is opposite to the illumination surface. in a parallel state. However, although the lower surface of the illuminating head 4 or the like is an effective judgment factor, it is not necessarily limited to this. Whether or not the illuminating head is facing directly downward should be judged individually for each actual product based on the diversity of the overall shape and structure (including optical mechanisms) in the actual product. In addition, in a system (lighting equipment) in which the adjustment of the illumination head is performed by an electric motor or the like, in most cases, the state where the illumination head faces directly downward is considered as the initial setting, so this original initial setting can be used. The direction of the illumination head in the set state is the state facing directly downward. When the power is turned on in the initial setting state that has not been adjusted by the user, the system is operated so that the irradiation area is formed further forward than directly below the illuminating head. The convenience of the lighting apparatus of the present invention can be directly appealed to the user.

In addition, in the present embodiment, the illumination head 4 may be provided with a mechanism capable of changing the inclination of the optical axis of the light emitted from the light source 5 . For example, as shown in FIG. 10 , in the light-emitting unit constituting the light source 5, a rotating shaft 8 extending in the Y direction of the lighting device 1 is provided, and the light source 5 can freely rotate within a predetermined range centered on the rotating shaft 8 way to constitute. The rotation of the light source 5 may be performed by manually rotating the rotating shaft 8, or may be performed automatically by an electric motor or the like. Thereby, the diffusion and intensity of the light emitted from the illuminating head 4 can be adjusted arbitrarily, and the convenience for the user can be further improved. Moreover, as long as a mechanism that can change the distance of the light-emitting unit (light source 5 ) with respect to the focal point B of the parabola is provided, focus adjustment becomes possible. In this case, the tilt adjustment of the optical axis and the focus adjustment can be performed at the same time only by the rotation of the rotation shaft 8 by eccentrically eccentric the rotation shaft 8 with respect to the light emitting unit in advance. Furthermore, with regard to the inclination of the optical axis of the light emitted from the light source 5 and the positional relationship between the light source 5 and the focal point B, it is also possible to fix the inclination at an arbitrary inclination without providing a driving mechanism such as the rotating shaft 8 . and location relationships.

(Second Embodiment)

In this embodiment, the formation of the irradiation area D further forward than directly below the illuminating head 4 is described by taking a combination of a plurality of optical systems (sub-light sources) of the first embodiment described above as an example.

FIG. 11 is a plan view showing the arrangement of the optical system of the present embodiment. The three reflecting plates 6a to 6c inside the illumination head 4 are arranged alternately offset in the front-rear direction. Sub-light sources 5a to 5c constituting the light source 5 are arranged in the reflection plates 6a to 6c, respectively. FIG. 12 is a cross-sectional view of the optical system on the left and right sides. FIG. 13 is a cross-sectional view of the optical system in the center. When the inclination of the optical axes of the sub-light sources 5a and 5c relative to the vertical direction in the left and right optical systems is θ 1, and the inclination of the optical axis of the sub-light source 5b in the central optical system is θ 2, θ 2 is set to be larger than θ 1. Since it is the same as that of the first embodiment except for the above-mentioned points, the description thereof is omitted here.

FIG. 14 is a diagram showing the light intensity distribution of each of the sub-light sources 5 a to 5 c before diffusion in the irradiation area D before diffusion. FIG. 15 is a diagram showing the light intensity distribution of the irradiation area D of the combined light source before the diffusion of the three sub-light sources 5a to 5c is superimposed, and FIG. 16 is a schematic diagram showing the light intensity distribution of the irradiation area D after the diffusion. As an example of the experiment, these figures show the distribution of a situation where the diameter of the illumination head 4 is set to about 200 mm, the height of the desk lamp is set to 300 mm, and a wide-ranging and circular light is emitted from a plane parallel to the installation surface. Compared with the irradiated area of the central light source ((b) in FIG. 14 ), the irradiated area of light by the left and right sub-light sources ((a) and (c) in FIG. 14 ) is in the front-rear direction ( The left and right directions in the figure) are diffused, whereby when the three lights are superimposed, a light close to a circle is formed ( FIG. 15 ). The irradiation area D is closer to a circle, and the illuminance can also be maintained. Again, the radiation from the three optical systems The emitted light energy is combined to form an irradiation area D further forward than directly below the illuminating head 4 .

In this way, according to the present embodiment, as in the first embodiment, the irradiation area D formed on the irradiation surface can be shifted further forward than directly below the illumination head 4 by combining a plurality of optical systems.

(third embodiment)

In the above-mentioned first and second embodiments, the description has been given by taking the example of forming the irradiation area D further forward than directly below the illuminating head, but in this embodiment, a combination of a plurality of optical systems is used. (sub-light source) and forming a large and perfect substantially circular irradiation area D directly under the illuminating head 4 as an example, the related description will be given.

FIG. 17 is a plan view of the optical system of this embodiment. Inside the illuminating head 4, four reflecting plates 6a to 6d obtained by cutting the reflecting plate 6 having the above-mentioned reflective properties are arranged in a point-symmetrical manner, that is, in an up-down-left-right pattern. In the reflection plates 6a to 6d, the plurality of sub-light sources 5a to 5d constituting the light source 5 are respectively arranged so as to be inclined. However, the relative inclination of the sub-light sources 5a to 5d with respect to the reflection plates 6a to 6d is smaller than that of the first embodiment and the second embodiment, and the reflected light from the reflection plates 6a to 6d does not leak from the irradiation head 4 Set in a way that is substantially scattered just below the . In addition, as shown in FIG. 18, the above-mentioned reflector 6 may be constituted as a single annular reflector 6e.

19 is a diagram showing the light intensity distribution before diffusion of the irradiation area D by the plurality of sub-light sources 5 a to 5 d , and FIG. 20 is a diagram showing the light intensity distribution after being diffused by the lens diffuser 7 . Four light fields are overlapped by the processing by the lens diffuser 7 , and the light intensity is uniformized in a large range and substantially circular, and the irradiation area D is formed.

According to this embodiment, by combining a plurality of optical systems, it is possible to form an irradiation area D having a large range and a substantially circular shape with uniform light intensity directly under the illuminating head 4 .

In addition, in the above-mentioned first and second embodiments, the irradiated area D is formed so as to be shifted further forward with respect to directly below the illumination head 4 as an example. The present invention is not limited to the front, and the present invention broadly includes a form that is offset in one direction with respect to the directly downward direction of the illuminating head 4 . In addition, the lighting apparatus 1 is not limited to a desk lamp type, and includes a clip type, a hanging type, and the like, and the lighting apparatus 1 may be constituted only by the lighting head 4 .

4: Lighting head

5: Light source

6: Reflector

7: Lens diffuser

A: Optical axis

Claims (7)

An illuminating device is provided with: a setting table; an illuminating head, which is formed on the illuminating surface in a state where the lower surface of the illuminating head is parallel with respect to the illuminating surface, and which is offset to the front with respect to directly below the illuminating head. an irradiation area; and an arm, which connects the setting table and the illumination head; the illumination head has: a first sub-light source; a second sub-light source, which is arranged more backward than the first sub-light source; a first reflector is a first irradiation area formed on the irradiation surface in a state where the lower surface of the illuminating head is parallel to the irradiation surface The reflected light from the light emitted from the first sub-light source is guided to a predetermined direction in a manner of being shifted further forward relative to directly below the illuminating head; and the second reflecting plate is further forward than the first reflecting plate. It is arranged to be offset rearward, has a curved shape that is asymmetric with respect to the optical axis of the light emitted from the second sub-light source, and is formed on the irradiation surface in a state where the lower surface of the illuminating head is parallel to the irradiation surface. The second illumination area of the illuminating head is further shifted to the front relative to the directly below the aforementioned illuminating head and is different from the front The reflected light reflected from the light emitted from the second sub-light source is guided in a predetermined direction in such a manner that at least a part of the first irradiation area overlaps and spreads further in the front-rear direction than the first irradiation area. The lighting device according to claim 1, wherein the inclination of the optical axis relative to the vertical direction in the first sub-light source is greater than the inclination of the optical axis relative to the vertical direction in the second sub-light source. The lighting device according to claim 1 or 2, wherein one of the first sub-light sources is arranged in the front center of the lighting head, and two of the second sub-light sources are arranged at the rear and left and right of the lighting head. The lighting device according to claim 1 or 2, further comprising a lens diffuser plate, which is disposed on the optical axis of the reflected light and diffuses the reflected light at a fixed angle; in a state where the lens diffuser plate has been removed , the first irradiation area and the second irradiation area at least partially overlap each other. The lighting device according to claim 1 or 2, wherein the reflection characteristics of the front side edge portions of the first reflector and the second reflector are based on the ray angle of the reflected light with respect to the vertical direction as the angle of the ray toward the front side increases. Reflections are made in such a way that the edge portion gradually decreases. The lighting device according to claim 5, wherein the first reflector and the second reflector have a cross-sectional shape inclined parabolically with respect to the optical axis of the light emitted from the first sub-light source and the second sub-light source as the aforementioned asymmetric curved surface shape. An illuminating device at least comprising: an illuminating head that forms an irradiated area on the illuminating surface that is offset to the front with respect to directly below the illuminating head in a state where the lower surface of the illuminating head is parallel to the illuminating surface The illuminating head has: a first sub-light source; a second sub-light source, which is arranged more backward than the first sub-light source; The optical axis is asymmetrically curved, and the first illumination area formed on the illumination surface in a state where the lower surface of the illumination head is parallel to the illumination surface is further shifted forward with respect to directly below the illumination head, guiding the reflected light reflected from the light emitted from the first sub-light source to a predetermined direction; and a second reflecting plate arranged to be offset further rearward than the first reflecting plate, The optical axis of the light emitted by the light source is asymmetrical, and the second illumination area formed on the illumination surface in a state where the lower surface of the illumination head is parallel to the illumination surface is more forward than directly below the illumination head. The reflected light reflected from the light emitted from the second sub-light source is guided in a predetermined direction by being offset and overlapping with at least a part of the first irradiation area and being diffused further in the front-rear direction than the first irradiation area.

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