JP2016103370A - Daylighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a daylighting system of which outer appearance does not become bad even if it is installed at a building, that can restrict attenuation of taken light and that can be realized by a simple structure.SOLUTION: A daylighting system 1 comprises a light collection part 3 for collecting light, a light guide part 4 for transmitting light outgoing from the light collecting part in a prescribed direction and a radiation part 5 for guiding light ejected from the light guide part into a prescribed space. The radiation part has a reflection surface for changing an advancing direction of light ejected from an ejecting end surface of the light guide part, the reflection surface has a parabolic surface or a plurality of bent surfaces where each of the end parts is positioned on the parabolic surface, the ejection end surface of the radiation part is arranged to be connected to the light guide part and arranged to be inclined from the ejection end surface of the light guide part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a daylighting system that actively uses natural light for daylighting.

  Attention has been focused on technology for reducing energy consumption by actively using natural light for daylighting to reduce the amount of carbon dioxide generated.

  As one of the techniques, an optical duct that guides external light to a predetermined indoor space is known. For example, Patent Document 1 discloses a technique in which light taken from a roof or the like is diffused by a diffusing member provided on an indoor ceiling and used as indoor illumination light.

JP2013-513920A

  In Patent Document 1, light is propagated through a reflective tube inside from a light inlet such as a roof to a diffusing member. The light propagates while being repeatedly reflected on the inner surface of the tube. However, each time the light is reflected, the amount of light is attenuated, and the actual utilization efficiency of the taken-in light is not so high.

  Sunlight enters the building obliquely from above. For this reason, a daylighting system that uses sunlight for daylighting is often installed on the wall surface of a building. However, when a daylighting system is installed on the wall surface, a light guide unit bent in, for example, an L shape or a J shape is required to propagate the light taken from the wall surface to the inner wall or floor of the room. There is a problem that a part of the light part has to be arranged away from the wall surface and the appearance is not good. At the same time, the number of times the light is reflected by the inner surface of the light guide portion increases, and the attenuation of the light amount increases. In addition, the structure becomes complicated.

  The problem to be solved by the present invention is to provide a daylighting system that does not deteriorate in appearance even if it is installed in a building and that can suppress attenuation of light taken in and that can be realized with a simple structure. .

In order to solve the above problems, in one embodiment of the present invention, a daylighting unit that captures light;
A light guide for propagating light emitted from the daylighting unit in a predetermined direction;
A lighting system comprising: a radiation unit that guides light emitted from the light guide unit to a predetermined space;
The radiating portion has a reflecting surface that changes a traveling direction of light emitted from the emitting end surface of the light guide portion,
The reflective surface has a parabolic surface, or a plurality of folded surfaces each having an end located on the parabolic surface,
There is provided a daylighting system in which an emission end face of the radiating section is arranged so as to be connected to the light guide section, and is inclined from the emission end face of the light guide section.

  The emission end surface of the radiating unit may be disposed so as to be flush with one side surface of the light guide unit connected to the emission end surface of the light guide unit.

  The normal direction of the emission end face of the radiation part may be orthogonal to the normal direction of the emission end face of the light guide part.

  The axial direction of the paraboloid may be set in accordance with the traveling direction of the light emitted from the emission end face of the radiating portion.

  The focal point of the paraboloid may be provided inside the light guide unit or the radiation unit.

  The focal point of the paraboloid may be provided on an emission end face of the light guide unit.

  You may provide the 1st diffuser member which diffuses the light radiate | emitted from the output end surface of the said radiation | emission part.

  You may provide the 2nd diffusion member which diffuses the light radiate | emitted from the output end surface of the said light guide part.

  According to the present invention, even if it is installed in a building, the appearance does not deteriorate, attenuation of light taken in can be suppressed, and a simple structure can be realized.

The longitudinal cross-sectional view which shows typically the building 2 to which the lighting system 1 was attached. Sectional drawing which shows the principal part of the lighting system 1 of FIG. The figure which shows the example which attached the lighting system 1 by this embodiment to the window 11. FIG. FIG. 3 is a cross-sectional view showing an example of an internal structure of a daylighting panel 21. Sectional drawing which shows another example of the internal structure of the lighting panel 21. FIG. Sectional drawing which made the reflective surface 6 of the radiation | emission part 5 the plane mirror. (A) is a simulation result of one Example, FIG.7 (b) is a figure which shows the simulation result of one comparative example.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual product. FIGS. 1-7 is a figure for demonstrating one Embodiment by this invention. Among these, FIG. 1 is a longitudinal sectional view schematically showing a building 2 to which a daylighting system 1 is attached.

  In the present specification, terms such as “panel”, “plate”, “sheet”, and “film” are not distinguished from each other only based on the difference in names. Therefore, for example, a “panel” is a concept including members that can also be called plates, sheets, and films. As a specific example, the “lighting panel” includes members called “lighting plate”, “lighting sheet”, “lighting film”, and the like.

  The daylighting system 1 shown in FIG. 1 is attached at the time of construction of a building 2 or after construction, and is for taking in light and guiding it to a predetermined space, for example, a room 2.

  The daylighting system 1 in FIG. 1 includes a daylighting unit 3 that takes in light, a light guide unit 4 that propagates light emitted from the daylighting unit 3 in a predetermined direction, and light emitted from the light guide unit 4 in a predetermined space. And a radiating portion 5 that leads to

  The light guide unit 4 and the radiation unit 5 are generally arranged in one direction, for example, the vertical direction of the building 2, and have a feature that the width in the direction orthogonal to the one direction, for example, the horizontal direction is narrow.

  The radiating unit 5 has a reflecting surface 6 that changes the traveling direction of light emitted from the emitting end surface 4 a of the light guide unit 4. The light reflected by the reflection surface 6 is emitted from the emission end surface 5 a of the radiating unit 5. The emission end surface 5 a of the radiating unit 5 is arranged along the light guide unit 4 and is inclined from the emission end surface 4 a of the light guide unit 4.

  Here, “inclined arrangement” means that the surface direction of the emission end surface 5 a of the radiating unit 5 is different from the surface direction of the emission end surface 4 a of the light guide unit 4. For example, in FIG. 1, the surface direction of the emission end surface 5 a of the radiating unit 5 and the surface direction of the emission end surface 4 a of the light guide unit 4 are different from each other by about 90 °. The surface direction of the end surface 5 a may be a direction different from the surface direction of the emission end surface 4 a of the light guide unit 4.

  The building 2 is provided with a light intake hole or a window in accordance with the position of the emission end face 5 a of the radiating portion 5. In the case where a light intake hole is provided, the hole is disposed so as to penetrate the outer wall of the building 2. Thereby, the light emitted from the emission end face 5a of the radiating portion 5 enters the inside of the building 2 through the light intake hole. When providing a window, the light radiate | emitted from the radiation | emission part 5 injects into the inside of the building 2 through a window.

  A diffusing member 7 is preferably attached to the emission end face 5 a of the radiating portion 5. Since the diffusing member 7 performs an action of diffusing the light emitted from the emission end face 5a of the radiating portion 5, the angle range of the light emitted from the light guide portion 4 can be widened. Further, by providing the diffusing member 7 on the emission end face 5 a of the radiating section 5, it is possible to prevent the possibility that foreign matter enters the radiating section 5 or the daylighting section 3 from the emission end face. Depending on the type of foreign matter, if floating substances in the air enter the radiating portion 5 from the emission end face 5a of the radiating portion 5, the reflection characteristics on the reflecting surface 6 of the radiating portion 5 and the inner surface of the daylighting portion 3 are adversely affected. There is a risk of giving. Therefore, it is desirable to seal the emission end face 5a of the radiating portion 5 with the diffusion member 7 or a transparent member.

  In addition, when joining the output end surface 5a of the radiation | emission part 5 to a light intake hole, you may attach the diffusion member 7 to the inner end surface of the building 2 of a light intake hole. Thereby, the light that has passed through the light intake hole can be diffused on the inner wall of the building 2.

  The daylighting system 1 in FIG. 1 can use the light taken in by the daylighting unit 3 as, for example, room illumination light. That is, by using the daylighting system 1 of FIG. 1, energy saving can be achieved and it can contribute to the reduction of carbon dioxide.

  FIG. 2 is a cross-sectional view showing a main part of the daylighting system 1 of FIG. 1 and shows a cross-sectional structure of the daylighting system 1 in the light propagation direction. The light guide unit 4 and the radiating unit 5 are hollow cylindrical members so that light propagates through the hollow portions of the light guide unit 4 and the radiating unit 5. The inner surfaces of the light guide portion 4 and the radiating portion 5 are made of a highly reflective material so that the light is not excessively attenuated during light propagation. The cross-sectional shape in the direction orthogonal to the light propagation direction of the hollow portion of the light guide portion 4 is not particularly limited, and may be, for example, a rectangle, a circle, or other shapes. The shape of the inner surface of the radiating portion 5 will be described later.

  The daylighting unit 3 is provided to stably take in light whose incident direction varies depending on the season and time zone. The light taken into the daylighting unit 3 is light including a plurality of components belonging to different wavelength bands, and is typically natural light typified by sunlight.

  The light guide unit 4 is typically a cylindrical member extending in one direction d1 and propagates light emitted from the emission end surface 3a of the daylighting unit 3 in one direction d1 which is the longitudinal direction of the light guide unit 4. Let A radiation portion 5 is connected to the emission end face 4 a of the light guide portion 4.

  In FIG. 1, the daylighting unit 3, the light guide unit 4, and the radiation unit 6 are separated by broken lines, but at least two of the daylighting unit 3, the light guide unit 4, and the radiation unit 6 may be integrally formed. . That is, in the present specification, the description is divided into three members 3, 4, and 6 in terms of function, but in actuality, it is not necessarily a divided structure of these three members.

  The radiating unit 5 has a reflecting surface 6 that changes the traveling direction of light emitted from the emitting end surface 4 a of the light guide unit 4. The reflecting surface 6 has a parabolic surface or a plurality of bent surfaces each having an end located on the parabolic surface. The light reflected by the reflection surface 6 is emitted from the emission end surface 5 a disposed so as to face the reflection surface 6.

  As shown in FIG. 2, the emission end surface 5 a of the radiating unit 5 is disposed so as to be connected to the emission end surface 4 a of the light guide unit 4. More specifically, the emission end surface 5a of the radiating unit 5 is connected to the emission end surface 4a of the light guide unit 4, and the emission end surface 5a of the radiation unit 5 and the emission end surface 4a of the light guide unit 4 are in different directions. Has been placed. Typically, the emission end surface 5a of the radiating unit 5 is arranged in the vertical direction d1 according to the outer wall surface of the building 2, and the emission end surface 4a of the light guide unit 4 is arranged in the horizontal direction. The emission end face 5 a of the radiating portion 5 is joined to a light intake hole provided in the outer wall of the building 2 without a gap. Thereby, the light emitted from the emission end face 5 a of the radiating unit 5 does not leak out of the building 2.

  It is desirable that the emission end surface 5a of the radiating unit 5 and the one side surface 4b of the light guide unit 4 connected thereto be flush with each other. In this case, by tightly bonding these surfaces to the outer wall of the building 2, there is no gap between the daylighting system 1 and the building 2, and the daylighting system 1 does not protrude greatly outside the building 2. , Looks better. In this way, the radiation unit 5 and the light guide unit 4 are arranged in the vertical direction d1, and the light guide unit 4 and the radiation unit 5 are both closely bonded to the wall surface of the building 2 so that the building 2 of the daylighting system 1 can be used. Can be minimized, and the influence of the daylighting system 1 on the exterior of the building 2 can be minimized. That is, the risk of impairing the design on the exterior of the building 2 can be reduced.

  As shown in FIG. 2, the radiating unit 5 has a parabolic surface 8 on the incident surface side of the daylighting unit 3, and the inner surface of the parabolic surface 8 is also a reflecting surface 6 composed of the parabolic surface 8. Yes. The reflecting surface 6 may actually be somewhat deformed from the ideal parabolic surface 8 or may approximate the parabolic surface 8 by a plurality of folded surfaces. The description will be made as a paraboloid 8 including those whose shapes are slightly deformed from 8. The paraboloid 8 is a surface that regularly reflects, that is, mirror-reflects, light from the daylighting unit 3, and can also be called a parabolic mirror.

  The paraboloid 8 has a focal point 9 and an axis 10. A paraboloid 8 is obtained by rotating the parabola around the axis 10 of the parabola represented by a quadratic function. In this specification, the parabolic axis 10 used to generate the paraboloid 8 is referred to as the axis 10 of the paraboloid 8. Alternatively, the paraboloid 8 may have a shape in which the parabola is swept in the normal direction.

  The focal point 9 of the paraboloid 8 is provided on the axis 10. Assuming that the paraboloid 8 performs specular reflection, as shown in FIG. 2, light that passes through the focal point 9 and is incident on an arbitrary position on the paraboloid 8 is reflected at each position. It is known to become parallel light. In other words, the focal point 9 is a point where the reflected light of the parallel light on the paraboloid 8 is focused when the parallel light is incident on the paraboloid 8. If the focal point 9 is set in a region through which light inside the light guide unit 4 or the radiating unit 5 passes, the light that has passed through the focal point 9 can be collimated by the reflecting surface 6 including the paraboloid 8.

  In this way, by setting the reflecting surface 6 of the radiating unit 5 as the paraboloid 8 and placing the focal point 9 in an appropriate position, that is, in the light passing region, parallel light can be created by the radiating unit 5.

  Since the focal point 9 is literally only one point, light that does not pass through the focal point 9 does not become parallel light in a strict sense even if it is reflected by the paraboloid 8. However, if the focal point 9 is provided inside the light guide unit 4 or the radiating unit 5, the light passing through the emission end face 4a of the light guide unit 4 will more or less pass through the vicinity of the focal point 9, and the parabola. After being reflected by the surface 8, the light travels in a direction close to parallel light. Therefore, in the present embodiment, the focal point 9 is disposed at a predetermined position inside the light guide unit 4 or the radiation unit 5.

  The focal point 9 is on the axis 10 of the paraboloid 8, and the direction of the axis 10 coincides with the direction of the parallel light reflected by the paraboloid 8. Therefore, when setting the focal point 9, it is necessary to take into account the reflection direction of light from the paraboloid 8. When the position of the focal point 9 and the direction of the axis line 10 are determined, the degree of inclination of the reflecting surface 6 including the paraboloid 8 is uniquely determined accordingly. For example, in FIG. 2, when the direction of the axis 10 is made closer to the horizontal direction, that is, when the parallel light reflected by the paraboloid 8 is made closer to the horizontal direction, the paraboloid 8 has the convex portion down and is in the horizontal direction. Will lean on. Conversely, when the direction of the axis 10 is brought close to the vertical direction, the paraboloid 8 is inclined in the vertical direction.

  Even if the light that has passed through other than the focal point 9 is reflected by the paraboloid 8, it does not become parallel light but travels in a direction close to the direction of the axis 10. Since it can be considered that all the light emitted from the emission end face 4 a of the light guide part 4 passes through the vicinity of the focal point 9, the reflection surface 6 is a paraboloid 8 and the inside of the light guide part 4 or the radiation part 5. If the focal point 9 is provided, the light reflected by the reflecting surface 6 can be regarded as traveling substantially in parallel.

  The entire reflecting surface 6 does not have to be the paraboloid 8, and only a part of the reflecting surface 6 may be the paraboloid 8. However, as the ratio of the paraboloid 8 to the entire reflection surface 6 increases, the light reflected by the reflection surface 6 can be made more parallel. Below, the example in which the whole reflective surface 6 is the paraboloid 8 is demonstrated.

  The inner surface of the light guide 4 and the reflecting surface 6 of the radiating part 5 are coated on the surface of the base material of the light guiding part 4 or the radiating part 5 with a high reflectance material such as silver, aluminum, or a dielectric multilayer film, for example. It is formed by doing. For example, when the cross section in the direction orthogonal to the light propagation direction of the light guide 4 is rectangular, prepare four thin plate base materials made of resin, metal material, etc., on one main surface of each thin plate base material After coating with a high reflectance material, the light guide part 4 is produced by joining the longitudinal ends of the thin plate base materials. About the radiation | emission part 5, after coating a highly reflective material on one main surface of the thin-plate base material of a paraboloid shape, it processes to a paraboloid shape by press processing etc.

  The daylighting system 1 according to the present embodiment can be attached to an outer wall extending in the vertical direction d1 of the building 2 or attached to a window extending in the vertical direction d1. For example, if the daylighting system 1 is attached to the south side window, sunlight is blocked by the light guide part 4 and the radiating part 5, so that the window surface may become dark, but sunlight is incident on the north side window. Therefore, by providing the daylighting system 1 in the north window and directing the incident surface of the daylighting unit 3 toward the south side, a predetermined direction near the north window can be intensively illuminated.

  FIG. 3 shows an example in which the daylighting system 1 according to the present embodiment is attached to the window 11. In the example of FIG. 3, the light guide 4 is joined to the outer wall above the window 11, and the radiating part 5 is disposed in close contact with the window 11. Since the light emitted from the radiating unit 5 travels in the direction of the axis 10 of the paraboloid 8, the specific range in the room located in this direction can be intensively illuminated.

  Even if another building 2 is built adjacent to the window 11 and sufficient external light is not incident on the window 11, the daylighting part 3 is brightened through the window 11 by extending to the high position where the sunlight hits. The amount of light can be taken.

  Next, the configuration of the daylighting unit 3 will be described. As shown in FIG. 2, the daylighting unit 3 includes a daylighting panel 21 on which light is incident, and a counter panel 31 disposed to face the daylighting panel 21. The distance S between the reflection surface of the opposing panel 31 and the light output side surface of the daylighting panel 21 gradually increases according to the position along the uniaxial direction d1.

  Side panels are respectively provided on both sides of the daylighting panel 21 and the opposing panel 31. Each side panel is connected to the edges of the daylighting panel 21 and the opposing panel 31 along the direction orthogonal to both the uniaxial direction d1 and the normal direction of the daylighting panel 21, that is, the depth direction of the paper surface in FIG. . A reflective surface is formed on the inner surface of the side panel in the same manner as the opposing panel 31.

  The daylighting panel 21, the opposing panel 31, and the both side panels form an opening on one side in the uniaxial direction d1, and this opening is the emission end face 3a of the daylighting section 3, and the light guide part 4 is on the emission end face 3a. It is connected.

  FIG. 4 is a cross-sectional view showing an example of the internal structure of the daylighting panel 21. The daylighting panel 21 of FIG. 4 has a light incident surface in which first and second surfaces that are not parallel to each other are alternately arranged. The first surface 22 a is inclined with respect to the vertical direction that coincides with the light output side surface 23 of the daylighting panel 21. The first surface 22a is inclined with respect to the vertical direction so as to face upward. On the other hand, each second surface 22 b is inclined to the opposite side to the first surface 22 a with respect to the light output side surface 23 or is orthogonal to the light output side surface 23. In the illustrated example, the second surface 22b is inclined with respect to the vertical direction so as to face downward.

  Therefore, as shown in FIG. 4, most of the light L31 and L32 from above in the vertical direction is incident on the first surface 22a of the light incident side surface 22 and refracted, and then exits in parallel with the vertical direction. The light is further refracted by the side surface 23 and enters the daylighting unit 3. Thereby, the light transmitted through the daylighting panel 21 from the upper side to the lower side in the vertical direction is deflected in the traveling direction so that the inclination angle with respect to the vertical direction becomes small, and propagates in the direction of the light guide unit 4.

  The internal structure of the daylighting panel 21 is not limited to that shown in FIG. For example, FIG. 5 is a cross-sectional view showing another example of the internal structure of the daylighting panel 21. The daylighting panel 21 shown in FIG. 5 is formed by laminating a support plate 22, a bonding layer 23, a light-transmitting light-transmitting substrate 24, and a molded substrate 26 in order from the light incident side toward the light-emitting side. Structure. As the support plate 22, for example, a glass plate or an acrylic plate can be used. As the bonding layer 23, a bonding material known per se can be used. In addition, the shaping | molding base material 26 is a base material required in order to manufacture the lighting panel 21, as mentioned later.

  In the translucent substrate 24, a plurality of reflectors 25 arranged along a uniaxial direction d1 extending in a plane parallel to the first surface 24a are provided. Each reflector 25 is inclined downward in the vertical direction d1 with respect to the horizontal direction nd from the first surface 24a side to the second surface 24b side. The angle θ at which the reflecting material 25 is inclined downward with respect to the normal direction nd is determined according to the incident directions of the lights P1 and P2 intended to change the traveling direction. For example, the traveling direction of the light P1 from the sun having a relatively low altitude such as the time zone of winter or morning or evening is changed so as to be directed further downward by the reflector 25, so that the time zone of the daytime in summer is changed. It is intended to transmit such light P2 from the sun having a relatively high altitude while maintaining the traveling direction.

The internal structure of the daylighting panel 21 is not limited to that shown in FIG. 4 or FIG. Any structure may be used as long as the light incident on the daylighting unit 3 can be efficiently propagated to the light guide unit 4.
Thus, in this embodiment, in order to arrange the light guide unit 4 and the radiation unit 5 of the daylighting system 1 so as to be connected in one direction, when the daylighting system 1 according to this embodiment is installed on the outer wall of the building 2, The amount of overhang from the outer wall can be reduced, and the influence on the appearance of the building 2 can be reduced as much as possible. More specifically, both the light guide unit 4 and the radiation unit 5 are in close contact with the building 2 so that the emission end surface 5a of the radiation unit 5 is flush with the one side surface 4b of the light guide unit 4 side. They can be joined, and there is no gap between the building 2 and the daylighting system 1, so that the daylighting system 1 can be attached to the building 2 in a compact manner. Moreover, since the light guide 4 and the radiating part 5 acting as an optical duct are arranged so as to be connected to the outer wall of the building 2, it is not always necessary to route the optical duct inside the building 2, and installation work on the building 2 is easy. become.

  Moreover, since the radiation | emission part 5 has the reflective surface 6 which consists of the paraboloid 8, the light taken in from the lighting part 3 can be taken in the predetermined direction inside the building 2, and according to a season and a time zone, Even if the altitude of sunlight changes, the lighting direction can always be aligned.

  Furthermore, the lighting direction can be arbitrarily adjusted by adjusting the direction of the axis 10 of the paraboloid 8 when the lighting system 1 is designed or installed.

  As described above, the daylighting system 1 according to the present embodiment can be easily attached to an existing building 2 that is not equipped with daylighting facilities, and since it has a simple structure, the installation cost does not increase so much. Lighting can be aimed at a desired direction. Since natural light is used for lighting, the amount of carbon dioxide emission can be limited and energy saving can be promoted.

  The inventor evaluated the light propagation direction of the daylighting system 1 according to the above-described embodiment by simulation. In this evaluation, the reflecting surface 6 of the radiating portion 5 is an ideal parabolic mirror. Hereinafter, the daylighting system 1 using an ideal parabolic mirror is referred to as an embodiment. As a comparative example, as shown in FIG. 6, the same evaluation was performed for the daylighting system 1 in which the reflecting surface 6 of the radiating unit 5 is not a parabolic mirror but a plane mirror 13.

  In one example and one comparative example, the shape and size of the daylighting unit 3 and the light guide unit 4 are the same except that the shape of the reflection surface 6 of the radiating unit 5 is different. Specifically, the diameter of the light guide unit 4 was 50 mm, and the length of the radiating unit 5 in the vertical direction was 400 mm.

  A parabola that is a cross section of the paraboloid 8 is expressed by the following equation (1).

  In the formula (1), f is the distance between the focal point 9 and the apex of the parabola, that is, the focal length. In the equation (1), the coordinates (x, y) = (0, f) of the focal point 9 are satisfied.

  In one embodiment, the focal length f = 50 mm. Further, the axis 10 of the parabolic mirror was inclined 45 ° from the vertical direction. In addition, the focal point 9 of the parabolic mirror is disposed on the right side of the central portion of the emission end surface 4a of the light guide unit 4, that is, on the side away from the parabolic mirror. Further, the emission end surface 5 a of the radiating unit 5 is flush with the one side surface 4 b on the right side of the light guide unit 4.

  FIG. 7A shows a simulation result of one example, and FIG. 7B shows a simulation result of one comparative example. As can be seen from these figures, compared to the comparative example, in one example, the light reflected by the parabolic mirror proceeds in a direction closer to parallel. That is, in one comparative example, light is emitted nonuniformly from a radiating portion 5 in a wide angle range, whereas in one embodiment, light is emitted uniformly from a radiating portion 5 in a narrow angle range.

  Thereby, if the lighting system 1 by one Example is used, it turns out that it can illuminate aiming at the direction of the axis 10 of the paraboloid 8 set beforehand.

  The aspect of the present invention is not limited to the individual embodiments described above, and includes various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the contents described above. That is, various additions, modifications, and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and equivalents thereof.

    DESCRIPTION OF SYMBOLS 1 Daylighting system, 2 Building, 3 Daylighting part, 4 Light guide part, 5 Radiation part, 6 Reflecting surface, 7 Diffusing member, 8 Paraboloid, 9 Focus, 10 Axis, 11 Window, 21 Daylighting panel, 31 Opposite panel

Claims (8)

A daylighting section that captures light;
A light guide for propagating light emitted from the daylighting unit in a predetermined direction;
A lighting system comprising: a radiation unit that guides light emitted from the light guide unit to a predetermined space;
The radiating portion has a reflecting surface that changes a traveling direction of light emitted from the emitting end surface of the light guide portion,
The reflective surface has a parabolic surface, or a plurality of folded surfaces each having an end located on the parabolic surface,
The daylighting system in which the emission end face of the radiation part is arranged so as to be connected to the light guide part and is inclined from the emission end face of the light guide part.   2. The daylighting system according to claim 1, wherein an emission end surface of the radiation unit is arranged to be flush with one side surface of the light guide unit that is continuous with the emission end surface of the light guide unit.   3. The daylighting system according to claim 1, wherein the normal direction of the emission end face of the radiating portion is orthogonal to the normal direction of the emission end face of the light guide portion.   The daylighting system according to any one of claims 1 to 3, wherein an axial direction of the paraboloid is set in accordance with a traveling direction of light emitted from an emission end face of the radiation unit.   The daylighting system according to claim 1, wherein a focal point of the paraboloid is provided inside the light guide unit or the radiation unit.   The daylighting system according to claim 5, wherein a focal point of the paraboloid is provided on an emission end face of the light guide unit.   The daylighting system according to claim 1, further comprising a first diffusion member that diffuses light emitted from an emission end face of the radiation unit.   The daylighting system according to any one of claims 1 to 7, further comprising a second diffusion member that diffuses light emitted from an emission end face of the light guide unit.

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