Optical lens, light source device, illuminating device, and moving body

Abstract

To apply irradiation light having directivity in an arbitrary direction even if the optical axis direction of a light source cannot be changed.SOLUTION: An illumination lens 2 comprises a first lens part 21 and a second lens part 22. The first lens part 21 comprises a first incidence surface 211 for receiving light from a light source 1, and a first emission surface 212 for receiving the light incident from the first incidence surface 211, and emitting the light. The second lens 22 comprises a second incidence surface 221 for receiving the light from the light source 1, a reflection surface 222 for reflecting the light incident on the second incidence surface 221, and a second emission surface 223 for emitting the light reflected by the reflection surface 222. The light applied from the first emission surface 212 and the second emission surface 223 has directivity in a direction different from the optical axis direction of the light source 1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an optical lens, a light source device, an illumination device, and a moving object. [Background technology]

[0002] BACKGROUND ART Conventionally, there has been an increasing need for lighting devices that are installed to create various spatial effects.

[0003] The illumination fixture of Patent Document 1 includes a light source arranged with its optical axis facing an irradiation surface located a predetermined distance away, with the irradiation direction being the irradiation surface, and a lens arranged to cover the light-emitting area of ​​the light source around the optical axis and consisting of a first lens portion and a second lens portion with the optical axis as the boundary. The first lens portion has an incident surface and an exit surface and refracts and emits light from the light source. The second lens portion has an incident surface, an exit surface, and a reflective surface that reflects light from the light source that enters through the incident surface and passes through the second lens portion to the exit surface. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-226766 Summary of the Invention [Problem to be solved by the invention]

[0005] However, lighting devices are often installed in small spaces inside moving objects such as vehicles and aircraft. In such cases, it is often not possible to change the optical axis direction of the light source inside the lighting device. As a result, it may not be possible to emit directional light in any direction.

[0006] The present disclosure aims to provide an optical lens, a light source device, an illumination device, and a moving body that can emit directional light in any direction even when the optical axis direction of the light source cannot be changed. [Means for solving the problem]

[0007] In order to achieve the above object, an optical lens according to one embodiment of the present disclosure comprises a first lens portion and a second lens portion, wherein the first lens portion comprises a first incident surface that receives light from a light source and a first exit surface that receives light incident from the first incident surface and exits the light, and the second lens portion comprises a second incident surface that receives light from the light source, a reflecting surface that reflects light incident on the second incident surface, and a second exit surface that exits light reflected by the reflecting surface, and the light irradiated from the first exit surface and the second exit surface is light having directionality in a direction different from the optical axis direction of the light source. [Effects of the Invention]

[0008] According to the present invention, even when the optical axis direction of the light source cannot be changed, it is possible to emit directional light in any direction. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a side view of an illumination device according to a first embodiment. [Figure 2] FIG. 1 is a perspective view of an illumination device according to a first embodiment. [Figure 3] FIG. 1 is a front view of an illumination device according to a first embodiment. [Figure 4] FIG. 2 is a perspective view showing the illumination range of the lighting device according to the first embodiment. [Figure 5] FIG. 4 is a perspective view showing another example of the lighting device according to the first embodiment. [Figure 6] FIG. 4 is a perspective view showing another example of the illumination range of the lighting device according to the first embodiment. [Figure 7] FIG. 10 is a side view of the lighting device according to the second embodiment. [Figure 8] FIG. 10 is a perspective view showing the illumination range of the lighting device according to the second embodiment. [Figure 9] FIG. 10 is a side view of the lighting device according to the third embodiment. [Figure 10] FIG. 11 is a perspective view showing an illumination range of an illumination device according to a third embodiment. [Figure 11]FIG. 10 is a perspective view of an illumination device according to a fourth embodiment. [Figure 12] FIG. 10 is a perspective view showing the illumination range of the lighting device according to the fourth embodiment. [Figure 13] FIG. 10 is a perspective view of an illumination device according to a fifth embodiment. [Figure 14] FIG. 11 is a perspective view showing an illumination range of an illumination device according to a fifth embodiment. [Figure 15] FIG. 10 is a perspective view of an illumination device according to a sixth embodiment. [Figure 16] FIG. 13 is a perspective view showing another example of the lighting device according to the sixth embodiment. [Figure 17] FIG. 13 is a perspective view of an illumination device according to a seventh embodiment. [Figure 18] FIG. 13 is a side view showing the illumination range of the lighting device according to the seventh embodiment. [Figure 19] FIG. 13 is a schematic view showing a moving body equipped with an illumination device according to a seventh embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0011] (First embodiment) FIG. 1 shows a side view of the lighting device according to the first embodiment, FIG. 2 shows a perspective view of the lighting device according to the first embodiment, and FIG. 3 shows a front view of the lighting device according to the first embodiment. In the following description, the X direction indicates the optical axis direction of the light source 1, the Y direction indicates a direction perpendicular to the X direction (the vertical direction in FIG. 1), and the Z direction indicates a direction perpendicular to the Y direction and the Z direction (the depth direction in FIG. 1, corresponding to the first direction). In FIG. 1 and other figures, the light emitted from the light source 1 is indicated by a solid line. In FIG. 1 and other figures, the irradiation direction of this lighting device is the Y' direction. The angle between the Y' direction and the X direction is angle θ. The light source 1 and the lighting lens 2 correspond to the light source device.

[0012] The lighting device according to this embodiment includes a light source 1 and an illumination lens 2 (optical lens).

[0013] 1, the light source 1 is configured by a light emitting diode (LED) or the like, and has an optical axis in the X direction. Note that the light source 1 may be any other light source, such as a fluorescent tube.

[0014] The illumination lens 2 is disposed so as to cover the light emitting area of ​​the light source 1. The illumination lens 2 is made of a material having a predetermined transmittance, such as acrylic resin, polycarbonate resin, or glass.

[0015] The illumination lens 2 includes a first lens portion 21 and a second lens portion 22. The first lens portion 21 and the second lens portion 22 are separated by a boundary 23.

[0016] First lens portion 21 includes first entrance surface 211 and first exit surface 212 .

[0017] The first incident surface 211 collects the light emitted from the light source 1 and emits it to the first exit surface 212. The first incident surface 211 extends from the upper end of the boundary 23 in the drawing to the lower end of the illumination lens 2 in the drawing.

[0018] The first exit surface 212 emits the light that has entered through the first entrance surface 211 in the Y' direction. The first exit surface 212 extends from the lower end of the illumination lens 2 in the drawing to the lower end of the boundary 23 in the drawing.

[0019] The second lens portion 22 includes a second entrance surface 221 , a reflecting surface 222 , and a second exit surface 223 .

[0020] The second entrance surface 221 collects the light emitted from the light source 1 and emits it to the reflecting surface 222. The second entrance surface 221 extends from the upper end of the boundary 23 to the upper end of the illumination lens 2 in the drawing.

[0021] Reflecting surface 222 reflects the light that has entered through second incident surface 221 to second exit surface 223. Reflecting surface 222 extends along the X direction.

[0022] The second exit surface 223 emits the light that has entered through the reflecting surface 222 in the Y' direction. The second exit surface 223 extends from the upper end of the illumination lens 2 in the drawing to the lower end of the boundary 23 in the drawing.

[0023] In this embodiment, first emission surface 212 and second emission surface 223 are formed on the same plane.

[0024] 2, the illumination lens 2 has a cross section in the XY direction that extends (swept) in the Z direction. That is, the illumination lens 2 is formed so that the cross sections of the first lens portion 21 and the second lens portion 22 extend in the Z direction. As a result, the first entrance surface 211 and the second entrance surface 221 of the illumination lens 2 are arranged to cover the light emitting area of ​​the light source 1.

[0025] Fig. 4 is a perspective view showing the illumination range of the illumination device according to the first embodiment. As shown in Fig. 4, this illumination device emits linear illumination light L1. That is, in this embodiment, the illumination device can emit directional illumination light in the Y' direction, which is different from the X direction, which is the optical axis direction of the light source 1. This allows illumination light with directionality to be emitted in any direction, even if the illumination direction of the light source cannot be changed.

[0026] In this embodiment, the method of designing illumination lens 2 involves first determining the irradiation direction (Y' direction) of the illumination device, and then designing first emission surface 212 and second emission surface 223. After this, reflecting surface 222 is designed, and then first entrance surface 211 and second entrance surface 221 are designed. This makes it possible to set the irradiation direction (Y' direction) of the illumination device to any direction.

[0027] (Variation) Fig. 5 is a perspective view showing another example of the lighting device according to embodiment 1. In Fig. 5, two light sources 1 are provided in this lighting device.

[0028] Specifically, two light sources 1 are provided for one illumination lens 2. The two light sources 1 are arranged side by side in the Z direction. The cross section of the illumination lens 2 in the XY direction has a shape that extends (is swept) in the Z direction. That is, the illumination lens 2 is formed so that the cross sections of the first lens portion 21 and the second lens portion 22 extend in the Z direction. As a result, the first entrance surface 211 and the second entrance surface 221 of the illumination lens 2 are arranged to cover the light-emitting areas of the two light sources 1.

[0029] Fig. 6 is a perspective view showing another example of the illumination range of the illumination device according to the first embodiment. As shown in Fig. 4, in this illumination device, light emitted from two light sources 1 becomes one linear illumination light L1. This makes it possible to widen the illumination range of the illumination light.

[0030] In FIG. 5, three or more light sources 1 may be provided for one illumination lens 2.

[0031] (Second embodiment) 7 shows a side view of an illumination device according to the second embodiment. In the second embodiment, the shapes of first emission surface 212 of first lens portion 21 and second emission surface 223 of second lens portion 22 are different from those in the first embodiment.

[0032] Specifically, first exit surface 212 and second exit surface 223 are convex when viewed from the Z direction. First exit surface 212 and second exit surface 223 may be aspherical or spherical with a predetermined curvature, or may have different curvatures.

[0033] Fig. 8 is a perspective view showing the illumination range of the lighting device according to the second embodiment. In Fig. 8, the illumination range of the illumination light L1 in Fig. 4 is indicated by a two-dot chain line.

[0034] As shown in Fig. 8, the present illumination device emits linear illumination light L2 that is narrower in the width direction than that of Fig. 4. In the second embodiment, by forming first emission surface 212 of first lens portion 21 and second emission surface 223 of second lens portion 22 into a convex shape, it is possible to collect light that could not be collected by first entrance surface 211 and second entrance surface 221, and to narrow the illumination range of the illumination light.

[0035] (Third embodiment) 9 shows a side view of an illumination device according to the third embodiment. In the third embodiment, the shapes of first emission surface 212 of first lens portion 21 and second emission surface 223 of second lens portion 22 are different from those in the first embodiment.

[0036] Specifically, first exit surface 212 and second exit surface 223 are concave when viewed from the Z direction. First exit surface 212 and second exit surface 223 may be aspherical or spherical with a predetermined curvature, or may have different curvatures.

[0037] Fig. 10 is a perspective view showing the illumination range of the lighting device according to the third embodiment. In Fig. 10, the illumination range of the illumination light L1 in Fig. 4 is indicated by a two-dot chain line.

[0038] As shown in Fig. 10, the present lighting device emits linear irradiation light L3 that is wider in the width direction than that of Fig. 4. In the third embodiment, first emission surface 212 of first lens portion 21 and second emission surface 223 of second lens portion 22 are formed in a concave shape, thereby making it possible to widen the irradiation range of the irradiation light.

[0039] (Fourth embodiment) 11 is a perspective view of an illumination device according to Embodiment 4. In the fourth embodiment, the shapes of first emission surface 212 of first lens portion 21 and second emission surface 223 of second lens portion 22 are different from those in the first embodiment.

[0040] Specifically, first exit surface 212 and second exit surface 223 are convex when viewed from the X direction. First exit surface 212 and second exit surface 223 may be aspherical or spherical with a predetermined curvature, or may have different curvatures.

[0041] Fig. 12 is a perspective view showing the illumination range of the lighting device according to the fourth embodiment. In Fig. 12, the illumination range of the illumination light L1 in Fig. 4 is indicated by a two-dot chain line.

[0042] As shown in Fig. 12, the illumination device emits linear irradiation light L4 that is narrower in the longitudinal direction than that of Fig. 4. In the fourth embodiment, first emission surface 212 of first lens portion 21 and second emission surface 223 of second lens portion 22 are formed in a convex shape, thereby making it possible to narrow the irradiation range of the irradiation light.

[0043] (Fifth embodiment) 13 is a perspective view of an illumination device according to Embodiment 5. In the fifth embodiment, the shapes of first emission surface 212 of first lens portion 21 and second emission surface 223 of second lens portion 22 are different from those in the first embodiment.

[0044] Specifically, first exit surface 212 and second exit surface 223 are concave when viewed from the X direction. First exit surface 212 and second exit surface 223 may be aspherical or spherical with a predetermined curvature, or may have different curvatures.

[0045] Fig. 14 is a perspective view showing the illumination range of the lighting device according to the fifth embodiment. In Fig. 14, the illumination range of the illumination light L1 in Fig. 4 is indicated by a two-dot chain line.

[0046] As shown in Fig. 14, the present lighting device emits linear irradiation light L5 that is wider in the longitudinal direction than that of Fig. 4. In the fifth embodiment, first emission surface 212 of first lens portion 21 and second emission surface 223 of second lens portion 22 are formed in a concave shape, thereby making it possible to widen the irradiation range of the irradiation light.

[0047] (Sixth embodiment) 15 is a perspective view of an illumination device according to a sixth embodiment. In the sixth embodiment, compared to the first embodiment, the illumination device is provided with two light sources 1 and two illumination lenses 2.

[0048] Specifically, two light sources 1 are arranged side by side in the Z direction. One illumination lens 2 is provided for each light source 1.

[0049] A flat plate-shaped member 24 is provided on the outer periphery of the illumination lens 2. The illumination lens 2 is connected to other illumination lenses 2 via the flat plate-shaped member 24. The flat plate-shaped member 24 can be separated at boundary surfaces 241 extending in the X and Y directions.

[0050] In this embodiment, the irradiation direction of the irradiation light emitted from each light source 1 can be adjusted by adjusting the emission surface (first emission surface 212 and second emission surface 223) of each illumination lens 2. Furthermore, the size of the illumination device can be adjusted by adjusting the length (size) of the flat plate-like member 24.

[0051] A prism 25 is formed on the side surface of the illumination lens 2. The prism 25 reflects light that enters the side surface of the illumination lens 2 from the light source 1. This prevents light emitted from the light source from entering other illumination lenses 2 (incompatible illumination lenses 2), thereby preventing stray light. Furthermore, by forming the prism 25 on the side surface of the illumination lens 2, it is possible to eliminate the need for measures against stray light after the illumination lens 2 is manufactured.

[0052] In this embodiment, the lighting device may be provided with three or more light sources 1 and three or more lighting lenses 2.

[0053] (Variation) Fig. 16 is a perspective view showing another example of the lighting device according to the sixth embodiment. In Fig. 16, instead of the prism 25, a light-shielding layer 251 is provided on the side surface of the lighting lens 2.

[0054] The light-shielding layer 251 is formed of a material that blocks incident light (for example, a black material). The light-shielding layer 251 is formed, for example, by providing a sheet-shaped (flat plate-shaped, film-shaped, etc.) member that is formed so as to become thinner in the thickness direction on the side surface of the illumination lens 2. Alternatively, the light-shielding layer 251 may be formed by applying a material that blocks incident light to the side surface of the illumination lens 2.

[0055] 16, a light-shielding layer 251 is provided on the side surface of the illumination lens 2. The light-shielding layer 251 absorbs (blocks) light that enters the side surface of the illumination lens 2 from the light source 1. This prevents light emitted from the light source from entering other illumination lenses 2 (incompatible illumination lenses 2), thereby preventing stray light.

[0056] Seventh embodiment 17 shows a perspective view of an illumination device according to a seventh embodiment. In the seventh embodiment, compared to the first embodiment, the illumination lens 2 is provided with a third lens portion 26. Furthermore, this illumination device is provided with two light sources 1 and two illumination lenses 2.

[0057] Specifically, the illumination lens 2 includes a third lens portion 26. The third lens portion 26 is disposed to the side of the first lens portion 21 and the second lens portion 22. The third lens portion 26 is provided with one light source 1. The third lens portion 26 is a flat lens.

[0058] Fig. 18 is a side view showing the illumination range of an illumination device according to the seventh embodiment. As shown in Fig. 18, illumination light L6 emitted from the first lens portion 21 and the second lens portion 22 of the illumination lens 2 is irradiated as light having directionality in the Y' direction. Illumination light L7 emitted from the third lens portion 26 is irradiated as light diffused in the X direction. As a result, in this embodiment, a single illumination device can emit both directional illumination light and diffused light.

[0059] 17, the third lens unit 26 is connected to other illumination lenses 2 arranged side by side in the Z direction. The third lens unit 26 and the other illumination lenses can be separated by a boundary surface 261 extending in the X direction and the Y direction.

[0060] In this embodiment, by adjusting the emission surface (first emission surface 212, second emission surface 223, and third lens portion 26) of each illumination lens 2, it is possible to adjust the irradiation direction of the illumination light emitted from each light source 1. Furthermore, by adjusting the length (size) of third lens portion 26, it is possible to adjust the size of the illumination device.

[0061] FIG. 19 is a schematic diagram showing a moving body equipped with an illumination device according to the seventh embodiment. As shown in FIG. 19, an illumination device A is disposed inside a moving body 3 (here, an aircraft). Specifically, the illumination device A is disposed in the moving body 3 between a shelf 31 for storing baggage and the like and a ceiling 32. The illumination device A illuminates the shelf 31 with directional irradiation light L6 and illuminates the ceiling 32 with diffused irradiation light L7. This makes it possible to illuminate only the vicinity of the shelf 31 downward, while widely illuminating the ceiling 31 above. Note that the moving body may be a vehicle, a ship, or the like, in addition to an aircraft. The illumination devices according to the first to sixth embodiments can also be used in the moving body 3.

[0062] As described above, the embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to these, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made as appropriate.

[0063] Furthermore, in the above-described embodiments and modifications, the illumination lens 2 has been described as an example of an optical lens, but the optical lens is not limited to the illumination lens 2. The optical lens may be any optical element that has optical properties corresponding to the above-described embodiments and modifications. [Industrial Applicability]

[0064] The lighting device of the present invention can be applied to lighting devices installed in narrow spaces such as mobile bodies. [Explanation of symbols]

[0065] 1 Light source (light source device) 2. Lighting lenses (optical lenses, light source devices) 21 First lens section 211 1st entrance plane 212 first exit surface 22 Second lens section 221 2nd entrance plane 222 Reflective surface 223 Second exit surface 24 Flat plate-shaped members 25 Prism 26 Third lens section 3. Mobile 31 Shelf 32 Ceiling A Lighting device L1~L7 Irradiation light

Claims

1. A first lens portion and a second lens portion are provided, The first lens portion is a first incident surface that receives light from the light source; a first exit surface that receives light incident on the first entrance surface and emits the light, The second lens portion is a second incident surface that receives light from the light source; a reflecting surface that reflects light incident on the second incident surface; a second exit surface that emits the light reflected by the reflecting surface, an optical lens, wherein the light emitted from the first exit surface and the second exit surface has directivity in a direction different from an optical axis direction of the light source;

2. The optical lens according to claim 1 , wherein the first light exit surface and the second light exit surface are formed on the same plane.

3. The optical lens according to claim 1 , wherein the first and second light exit surfaces have cross sections formed in a convex shape when viewed from the side.

4. The optical lens according to claim 1 , wherein the first and second light exit surfaces have a cross section formed in a concave shape when viewed from the side.

5. The optical lens according to claim 1 , wherein the first lens portion and the second lens portion extend in a first direction perpendicular to a cross section in a direction along the optical axis direction of the light source.

6. The optical lens according to claim 1 , wherein the first exit surface and the second exit surface have a cross section formed in a convex shape when viewed along the optical axis direction of the light source.

7. The optical lens according to claim 1 , wherein the first exit surface and the second exit surface have a cross section formed in a concave shape when viewed along the optical axis direction of the light source.

8. The optical lens according to claim 8 , wherein prisms are formed on side surfaces of the first lens portion and the second lens portion.

9. The optical lens according to claim 1; a light source device comprising the light source.

10. A plurality of the optical lenses; a plurality of the light sources; The light source device according to claim 8 , wherein the optical lens is connected to another optical lens via a flat plate-like member formed on a side thereof.

11. the light source includes a first light source and a second light source; the optical lens further includes a third lens portion having a flat plate shape and formed on a side of the first lens portion and the second lens portion, the first light source is provided corresponding to the first lens portion and the second lens portion, The light source device according to claim 8 , wherein the second light source is provided in correspondence with the third lens portion.

12. A plurality of the optical lenses; a plurality of the first light sources and the second light sources; In a first direction, the first light sources and the second light sources are arranged alternately, The optical device according to claim 11 , wherein the first lens portions and the third lens portions are arranged alternately in the first direction.

13. An illumination device comprising the light source device according to claim 9.

14. The optical lens according to claim 1; A moving object comprising the light source.

Images