WO2024062910A1 - Light-emitting device, light source unit, and vehicle - Google Patents

Light-emitting device, light source unit, and vehicle Download PDF

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Publication number
WO2024062910A1
WO2024062910A1 PCT/JP2023/032262 JP2023032262W WO2024062910A1 WO 2024062910 A1 WO2024062910 A1 WO 2024062910A1 JP 2023032262 W JP2023032262 W JP 2023032262W WO 2024062910 A1 WO2024062910 A1 WO 2024062910A1
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WO
WIPO (PCT)
Prior art keywords
light
emitting device
light emitting
lens
light source
Prior art date
Application number
PCT/JP2023/032262
Other languages
French (fr)
Japanese (ja)
Inventor
喜彦 金山
Original Assignee
パナソニックＩｐマネジメント株式会社
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Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2024062910A1 publication Critical patent/WO2024062910A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/13—Ultraviolet light; Infrared light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/70—Prevention of harmful light leakage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources

Definitions

  • the present invention relates to a light emitting device, a light source unit, and a vehicle.
  • Patent Document 1 discloses a device that is disposed on a door mirror (side mirror) of a vehicle and projects a pattern onto the ground outside the vehicle using light.
  • a door mirror may be provided with a light emitting device that emits light and an imaging device that captures an image of the road surface.
  • This type of imaging device captures an image of a road surface by detecting reflected light from a road surface, obstacles, etc. of light emitted from a light emitting device. At this time, if the imaging device detects light reflected by a vehicle or the like, halation may occur in the image generated by the imaging device.
  • the present invention provides a light-emitting device that can suppress halation in images generated by an imaging device.
  • a light-emitting device is a light-emitting device supported by a support body along with an imaging device that detects light emitted by the light-emitting device, and includes a light source and (i) light emitted by the light source. (ii) has an entrance surface through which light enters, and a bowl-shaped portion that widens as it moves away from the light source; and (ii) an exit surface through which light incident on the entrance surface exits, and projects in a direction away from the light source. a lens having a convex portion, the convex portion having a first total reflection surface that is at least a part of the exit surface and totally reflects light incident on the input surface.
  • the bowl-shaped portion has a second total reflection surface that is located in a direction intersecting the optical axis of the light emitted from the light source and totally reflects the light incident on the incidence surface
  • the light emitting device includes a first attenuator that reduces at least a portion of the light that is incident on the lens and is emitted toward the support body located in a direction intersecting the optical axis of the light emitted from the light source. Equipped with a light section.
  • a light source unit includes the light emitting device described above and the imaging device.
  • a vehicle according to one aspect of the present invention includes the light source unit described above, and is the support.
  • the light emitting device can suppress halation in images generated by an imaging device.
  • FIG. 1 is a front view showing a vehicle according to an embodiment.
  • FIG. 2 is a sectional view showing the configuration of the light source unit according to the embodiment.
  • FIG. 3 is a cross-sectional view showing the configuration of the light emitting device according to the embodiment.
  • FIG. 4 is a cross-sectional view for explaining how light travels in a light emitting device according to a comparative example.
  • FIG. 5 is a cross-sectional view showing the configuration of a light emitting device according to the first modification.
  • FIG. 6 is a sectional view showing the configuration of a light emitting device according to Modification Example 2.
  • each figure is a schematic diagram and is not necessarily a precise illustration. Therefore, for example, the scales of each figure do not necessarily match.
  • each figure is a schematic diagram in which emphasis, omissions, and ratios have been appropriately adjusted in order to illustrate the present invention, and may differ from the actual shapes, positional relationships, and ratios.
  • substantially identical configurations are given the same reference symbols, and duplicate explanations may be omitted or simplified.
  • the Z-axis direction is, for example, a vertical direction, and the positive direction of the Z-axis is sometimes described as upward, and the negative direction of the Z-axis is sometimes described as downward.
  • the Y-axis direction and the X-axis direction are directions perpendicular to each other on a plane (horizontal plane) perpendicular to the Z-axis.
  • the Y-axis direction may be described as the side of the vehicle.
  • the positive direction of the X-axis may be described as the direction in which the vehicle travels (forward)
  • the negative direction of the X-axis may be described as the direction opposite to the direction in which the vehicle travels (rearward).
  • terms indicating relationships between elements such as the same, numerical values, and numerical ranges are not expressions that express only strict meanings, but are expressions that indicate a substantially equivalent range, such as a few percent. This expression means that it also includes a difference of about 5% (for example, about 5%).
  • horizontal direction means not only a completely horizontal direction, but also includes an error of several percent, such as 5%, that occurs during manufacturing or placement.
  • ordinal numbers such as “first” and “second” do not mean the number or order of components, unless otherwise specified, and to avoid confusion between similar components, It is used to distinguish between elements.
  • FIG. 1 is a front view showing a vehicle 10 according to an embodiment. Note that in FIG. 1, light emitted by the light emitting device 200 (emitted light) is shown by a broken line.
  • the vehicle 10 is a moving object such as a car or a motorcycle that includes a light source unit 100.
  • vehicle 10 is an automobile.
  • Vehicle 10 is an example of a support.
  • the vehicle 10 includes a vehicle body 20, a door mirror 30, and a light source unit 100.
  • the vehicle body 20 has door mirrors 30 attached to its side portions, and is a vehicle body on which a driver gets in and drives the vehicle.
  • the vehicle body 20 supports door mirrors 30 at both side portions of the vehicle body 20.
  • the door mirror 30 is a side mirror attached to a side portion of the vehicle body 20.
  • a light source unit 100 is arranged in the door mirror 30.
  • a light emitting device 200 and an imaging device 300 are attached to the door mirror 30.
  • the light emitting device 200 and the imaging device 300 are attached to the door mirror 30 in the order of distance from the vehicle body 20.
  • the vehicle 10 includes the light emitting device 200 and the imaging device 300 in each of the door mirrors 30 located on both sides of the vehicle body 20 (both sides in the Y-axis direction), but only one of the door mirrors 30 includes the light emitting device 200 and the imaging device 300.
  • a light emitting device 200 and an imaging device 300 may be included.
  • an imaging device 300 and a light emitting device 300 are attached to the door mirror 30 in the order of distance from the vehicle body 20.
  • the light source unit 100 is an optical unit that emits light toward a road surface located around the vehicle 10 and detects reflected light that is reflected from the road surface. That is, the light source unit 100 emits light onto the road surface and images the road surface.
  • the light source unit 100 includes a light emitting device 200 and an imaging device 300.
  • the light emitting device 200 and the imaging device 300 included in the light source unit 100 are arranged on the outer surface of the vehicle 10, for example. Specifically, the light emitting device 200 is attached to the vehicle 10 at a position where the light emitting device 200 can irradiate light onto the road surface around the vehicle 10 when the light is emitted downward. In this embodiment, the light source unit 100 is arranged on the door mirror 30.
  • outer surface refers not only to the outer surface of the vehicle body 20, but also to the outer surface of a component attached to the vehicle body 20, such as the outer surface of the side or lower surface of the door mirror 30, or the outer surface of a door included in the vehicle 10. include. Further, when the vehicle 10 is provided with the light emitting device 200 and the imaging device 300 on the outer surface, it does not mean that the light emitting device 200 and the imaging device 300 are arranged on the outer surface, but also when the light emitting device 200 and the imaging device 300 are disposed on the outer surface of the vehicle. 10 is also included.
  • the light emitting device 200 is a light source section that is supported by the vehicle 10 (more specifically, the door mirror 30 included in the vehicle 10) along with the imaging device 300 that detects the light emitted by the light emitting device 200.
  • the light emitting device 200 is attached to the vehicle 10 together with the imaging device 300, and emits light onto the road surface.
  • light emitting device 200 emits near-infrared light.
  • the near-infrared light emitted by the light-emitting device 200 is, for example, light with a wavelength band of 800 nm or more.
  • the near-infrared light emitted by the light-emitting device 200 may have a wavelength band of 910 nm to 970 nm.
  • the intensity of sunlight with a wavelength of about 940 nm is weaker than other wavelength bands. Therefore, if the wavelength band of the near-infrared light emitted by the light-emitting device 200 is 940 ⁇ 30 nm, the road surface can be accurately captured by the imaging device 300 even if the light detection wavelength of the imaging device 300 is about 940 nm.
  • the light emitting device 200 is attached to the door mirror 30. Specifically, the light emitting device 200 is attached below the door mirror 30.
  • the light emitting device 200 is attached to the door mirror 30 so that the optical axis of the emitted light (dashed line in FIG. 2) is vertical as shown in FIG. 2 described later, but the light emitting device 200 may be attached to the vehicle 10 (e.g., the vehicle body 20 and/or the door mirror 30) so that the optical axis of the emitted light is inclined relative to the vertical direction (more specifically, the normal direction of the road surface on which the vehicle 10 is located).
  • the light emitting device 200 may be attached to the door mirror 30 so that the optical axis is inclined by about 10° to 20° relative to the vertical direction and emits light on the opposite side to the vehicle body 20.
  • the light emitting device 200 emits light toward the road surface located on the side of the vehicle 10, but it may also emit light toward the road surface in the front region and/or rear region of the vehicle 10. good.
  • the light emitting device 200 is arranged on the door mirror 30 so as not to emit light at least above the horizontal direction.
  • the light emitting device 200 may be arranged vertically below the imaging device 300. Thereby, by disposing the light emitting device 200 in the vehicle 10 so as to emit light downward, it is possible to suppress the light from the light emitting device 200 from directly entering the imaging device 300.
  • the imaging device 300 is a camera that images the road surface. Specifically, the imaging device 300 detects the light emitted from the light emitting device 200 and reflected on the road surface. That is, specifically, the imaging device 300 is attached to the door mirror 30 so that the light emitted by the light emitting device 200 and reflected on the road surface can be detected. The imaging device 300 generates an image of the road surface by detecting light reflected from the road surface around the vehicle 10 .
  • the light-emitting device 200 is, for example, a near-infrared light source that emits near-infrared light
  • the imaging device 300 is a near-infrared light source that emits near-infrared light
  • the imaging device 300 is a near-infrared light source that emits near-infrared light.
  • Near-infrared light emitted from 200 and reflected on the road surface is detected.
  • the imaging device 300 includes an imaging element such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor.
  • an imaging element such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor.
  • the vehicle body 20, the light emitting device 200, and the imaging device 300 are arranged in this order.
  • the vehicle body 20, the imaging device 300, and the light emitting device 200 may be arranged in this order.
  • the imaging device 300 may be located on the opposite side of the light emitting device 200 from the direction in which the light emitting device 200 emits light (in the present embodiment, downward and in the negative Z-axis direction). That is, the imaging device 300 may be located above the light emitting device 200. In this embodiment, the imaging device 300 is located above the light emitting device 200.
  • the light emitted from the light emitting device 200 is prevented from being directly incident on the imaging device 300 without being reflected on the road surface.
  • the light source unit 100 may include a light shielding section that is located between the imaging device 300 and the light emitting device 200 and blocks the light emitted by the light emitting device 200.
  • the light shielding portion may have a function of blocking the light, and may have a reflective property for the light, or may have an absorptive property for the light.
  • a control device that controls the light emitting device 200 and the imaging device 300 may be disposed in the vehicle 10.
  • the control device performs control so that the timing of light emission by the light emitting device 200 and the timing of photographing by the imaging device 300 are aligned.
  • the control device synchronizes and controls the light emitting device 200 and the imaging device 300 so that the imaging device 300 can appropriately detect the reflected light obtained by reflecting the light emitted by the light emitting device 200 on the road surface.
  • the control device performs PWM (Pulse with Modulation) control (PWM lighting) of the light emitting device 200 in synchronization with the imaging device 300, for example.
  • PWM Pulse with Modulation
  • the control device includes, for example, an interface to which control lines for controlling the light emitting device 200 and the imaging device 300 are connected, a nonvolatile memory in which a program is stored, and a volatile memory that is a temporary storage area for executing the program. It is realized by physical memory, a processor that executes programs, etc.
  • FIG. 2 is a cross-sectional view showing a light emitting device 200 according to an embodiment. Note that FIG. 2 is a diagram showing a cross section of the light emitting device 200 and the imaging device 300 arranged on the door mirror 30 located on the right side when the vehicle 10 is viewed from the front.
  • the light emitting device 200 includes a lid part 210, a terminal part 213, a packing 214, a heat sink 215, a heat dissipation sheet 216, a buffer material 217, a light source 220, a lens 230, a substrate 240, and a transparent cover 250. , is provided.
  • the lid portion 210 is a cover body for attaching the light emitting device 200 to the door mirror 30.
  • the lid portion 210 is formed with an attachment portion 211, and the attachment portion 211 is formed with a screw hole for attaching, for example, a screw 212.
  • the light emitting device 200 is attached to the door mirror 30 by screwing the screw 212 into the attachment portion 211.
  • the material of the lid portion 210 is not particularly limited, but for example, a resin material such as PBT (Polybutyleneterephthalate) or polycarbonate, or a metal material is used.
  • the terminal portion 213 is a terminal for supplying power from an external power source (not shown) to the light source 220.
  • the terminal portion 213 and the light source 220 are electrically connected by metal wiring (not shown) or the like.
  • the packing 214 is a buffer material located between the lens 230 and the heat sink 215.
  • the packing 214 is made of, for example, an elastic resin material such as rubber.
  • the heat sink 215 is a heat radiating member that is disposed on the back surface 242 side of the substrate 240, which is the surface opposite to the main surface 241, which is the surface on which the light source 220 is disposed, and radiates the heat generated by the light source 220.
  • heat sink 215 is supported by lid portion 210.
  • the heat sink 215 is made of, for example, aluminum metal, stainless steel, or the like, which has high thermal conductivity.
  • a substrate 240 is placed on the heat sink 215 with a heat dissipation sheet 216 interposed therebetween.
  • the heat dissipation sheet 216 is a sheet-like member that facilitates dissipation of heat generated by the light source 220 from the substrate 240 to the heat sink 215.
  • the material used for the heat dissipation sheet 216 is not particularly limited, and for example, a resin material may be used. Further, the heat dissipation sheet 216 may have electrical insulation properties.
  • the cushioning material 217 is a member placed between the door mirror 30 and the lens 230.
  • the cushioning material 217 is, for example, an elastic member such as a sponge.
  • the light source 220 is a light source that emits light.
  • the light source 220 emits, for example, near-infrared light.
  • the light source 220 includes, for example, a solid-state semiconductor light source such as an LED (Light Emitting Diode), and a lens that covers the solid-state semiconductor light source.
  • the lens 230 is an optical member into which the light emitted by the light source 220 is incident, and which emits the incident light. Specifically, the lens 230 is arranged to cover the lower part of the light source 220, receives the light emitted from the light source 220, controls the light distribution of the incident light, and emits the light toward the road surface. It's a lens.
  • the lens 230 (more specifically, the base material of the lens 230) is formed of, for example, a transparent glass material or a transparent resin material such as acrylic or polycarbonate.
  • the light source 220 is mounted (arranged) on the substrate 240 so that the optical axis of the light emitted from the lens 230 coincides with the optical axis of the lens 230.
  • the lens 230 is attached to the main surface 241 of the substrate 240 with an adhesive or the like, for example.
  • the substrate 240 is a substrate on which the light source 220 is placed.
  • the substrate 240 is arranged in contact with the lens 230 at the main surface 241 on which the light source 220 is placed.
  • the material of the substrate 240 is not particularly limited, but may be, for example, a metal substrate, a ceramic substrate, or a resin substrate.
  • the substrate 240 may be a flexible substrate or a rigid substrate.
  • the light-emitting device 200 may be attached to the door mirror 30 so that the optical axis of the light emitted by the light source 220 is parallel to the vertical direction, or may be arranged so that the optical axis of the light emitted by the light source 220 intersects with the vertical direction.
  • the light-emitting device 200 may be arranged, for example, so that the light emitted by the light source 220 is emitted in a direction away from the vehicle body 20.
  • the light-transmitting cover 250 is a cover member that covers the lens 230. Further, the light-transmitting cover 250 has a property of transmitting light emitted by the light source 220 (for example, a property of transmitting 90% or more of the light). That is, the light emitted from the lens 230 is transmitted through the light-transmitting cover 250.
  • the light-transmitting cover 250 has a bowl shape that projects downward and is open at the top.
  • the light source 220, lens 230, and substrate 240 are housed in a transparent cover 250.
  • the upper part of the transparent cover 250 is closed by the lid part 210.
  • the light-transmitting cover 250 (more specifically, the base material of the light-transmitting cover 250) is formed of, for example, a transparent glass material or a transparent resin material such as acrylic or polycarbonate.
  • the shape of the light-transmitting cover 250 is a convex shape projecting downward, but is not particularly limited, and may be a planar shape, for example.
  • the light-transmitting cover 250 may have a so-called lens function that refracts incident light.
  • the radius of curvature of the light-transmitting cover 250 (for example, the radius of curvature of the inner surface of the light-transmitting cover 250 and the radius of curvature of the outer surface of the light-transmitting cover 250) may be set arbitrarily.
  • the radius of curvature of the inner and outer surfaces of the light-transmitting cover 250 may each be 10 m or less.
  • FIG. 3 is a cross-sectional view showing the configuration of the light emitting device 200 according to the embodiment. Note that, in FIG. 3, among the plurality of components included in the light emitting device 200, a light source 220, a lens 230, a substrate 240, and a light-transmitting cover 250 are shown in an enlarged manner. Furthermore, in FIG. 3, the light emitted from the light source 220 is indicated by a broken line arrow.
  • the lens 230 includes a bowl-shaped portion 233 and a convex portion 234 that is formed integrally with the bowl-shaped portion 233 and protrudes from the bowl-shaped portion 233 to the side opposite to the light source 220.
  • the bowl-shaped portion 233 has an entrance surface 231 into which the light emitted by the light source 220 is incident, and has a shape that widens as it moves away from the light source 220. Further, the bowl-shaped portion 233 is a surface (that is, a side surface) located in a direction intersecting the optical axis of the light emitted from the light source 220, and is a second total surface that totally reflects the light incident on the incident surface 231. It has a reflective surface 236. That is, among the light emitted from the light source 220 and incident on the entrance surface 231, the light directed toward the second total reflection surface 236 is totally reflected by the second total reflection surface.
  • the entrance surface 231 has a concave shape on the side opposite to the light source 220.
  • the convex portion 234 has an exit surface 232 from which the light incident on the entrance surface 231 is output, and has a shape that projects in a direction away from the light source 220. Further, the convex portion 234 has a first total reflection surface 235 that is at least a part of the output surface 232 and totally reflects the light incident on the entrance surface 231. For example, the light source 220 and the lens 230 are arranged such that the top of the convex portion 234 overlaps with the optical axis of the light emitted by the light source 220.
  • the output surface 232 is composed of, for example, a surface of the bowl-shaped portion 233 located on the opposite side of the light source 220 and a first total reflection surface 235.
  • the light emitting device 200 is located in a direction intersecting the optical axis of the light emitted by the light source 220 (in the negative Y-axis direction as seen from the light source 220 in this embodiment) out of the light incident on the lens 230.
  • the vehicle body 20 includes a light attenuation section (first light attenuation section) that reduces at least part of the light emitted toward the vehicle body 20.
  • the light emitting device 200 includes a recess 237 as a first light attenuation section.
  • the recess 237 reduces at least a portion of the light emitted from the lens 230 toward the vehicle body 20 .
  • the recess 237 is a recess provided in the entrance surface 231.
  • the recess 237 is provided on the side of the entrance surface 231 opposite to the vehicle body 20 when viewed from the light source 220 (in other words, when viewed from the optical axis).
  • the lens 230 becomes a non-rotating body.
  • FIG. 4 is a cross-sectional view for explaining how light travels in light-emitting device 200A according to a comparative example.
  • the cross-section of light-emitting device 200A shown in FIG. 4 is a cross-section at a position corresponding to the cross-section of light-emitting device 200 shown in FIG. 3.
  • the light emitted from light source 220 is indicated by dashed arrows.
  • the emission direction of light from light source 220 shown in FIG. 3 is the same as the emission direction of light from light source 220 shown in FIG. 4.
  • the light emitting device 200A includes a lens 230A having a different shape from the lens 230 included in the light emitting device 200.
  • lens 230A does not have a recess 237.
  • Lens 230A is a rotating body with the optical axis of lens 230A (in this embodiment, the optical axis of the light emitted by light source 220) as its axis.
  • a light emitting device 200A using such a lens 230A and a light source 220 for example, as shown in FIG. You may be heading to
  • the lens 230 is provided with the recess 237 as shown in FIG. 3, unlike the way the light travels as shown in FIG.
  • the light incident on the second total reflection surface 236 is directed toward the second total reflection surface 236. Further, the light reflected by the second total reflection surface 236 is emitted from the lens 230 toward the side opposite to the vehicle body 20.
  • the first light attenuation section reduces the first total of the light emitted from the light source 220 when the light emitting device 200 does not include the first light attenuation section. It is provided in the optical path of light passing through the reflective surface 235. In the present embodiment, the recess 237 is provided in the optical path of the light emitted from the light source 220 that passes through the first total reflection surface 235 when the light emitting device 200 does not include the first light attenuation section. There is.
  • the lens is a collimator lens having a total reflection surface like the first total reflection surface 235, the light emitted from the lens is suppressed from going toward the vehicle 10.
  • the size, groove depth, shape, etc. of the recess 237 may be arbitrarily set so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
  • light attenuation means, for example, that light is emitted from the lens 230 and reaches the vehicle body 20 due to diffusion (scattering), refraction, reflection, and/or absorption, compared to a case where no light attenuation part is provided.
  • the amount of light for example, light energy or luminous flux
  • the light is refracted by the recess 237 in a different direction than when the recess 237 is not present, thereby reducing the amount of light per unit area of the light emitted from the lens 230 and directed toward the vehicle body 20.
  • FIGS. 5 and 6 are cross section at a position corresponding to the cross section of the light emitting device 200 shown in FIG. 3.
  • the light emitted from the light source is indicated by a broken line arrow.
  • the direction in which light is emitted from the light source 220 shown in FIG. 3 is the same as the direction in which light is emitted from the light source shown in FIGS. 5 and 6.
  • FIG. 5 is a cross-sectional view showing the configuration of a light emitting device 200B according to Modification 1.
  • the light emitting device 200B includes a lens 230B having a different shape from the lens 230 included in the light emitting device 200.
  • the lens 230B includes a recess 238.
  • the light emitting device 200B includes a recess 238 as a first dimming section.
  • the recess 238 reduces at least a portion of the light emitted toward the vehicle body 20 out of the light emitted from the lens 230B.
  • the recess 238 is a recess provided in the first total reflection surface 235.
  • the recessed portion 238 is provided on the opposite side of the first total reflection surface 235 from the vehicle body 20 when viewed from the light source 220 (in other words, when viewed from the optical axis).
  • the lens 230B becomes a non-rotating body.
  • the size, groove depth, and shape of the recess 238 may be set arbitrarily so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
  • FIG. 6 is a sectional view showing the configuration of a light emitting device according to Modification Example 2.
  • the light emitting device 200C includes the same lens as the lens 230A included in the light emitting device 200A. Further, the light emitting device 200C includes a light transmitting cover 250A having a shape different from the light transmitting cover 250 included in the light emitting device 200.
  • the light-transmitting cover 250A includes an uneven portion 251.
  • the light emitting device 200C includes an uneven portion 251 as a first light attenuation portion.
  • the uneven portion 251 reduces at least a portion of the light emitted toward the vehicle body 20 out of the light emitted from the lens 230A.
  • the light-reducing section may be provided on the light-transmitting cover.
  • the light reduction portion that is, the uneven portion 251 may be provided at any position on the light-transmitting cover 250A.
  • the uneven portion 251 is provided on the vehicle body 20 side of the transparent cover 250A when viewed from the light source 220 (in other words, when viewed from the optical axis).
  • the uneven portion 251 is formed between a first surface 252 of the transparent cover 250A, into which the light emitted from the lens 230A is incident, and a second surface 253, through which the light is emitted from the transparent cover 250A. , provided on the first surface 252.
  • the uneven portion 251 is realized by two convex portions and a concave portion located between the two convex portions.
  • the number of convex portions and concave portions included in the concavo-convex portion 251 may be arbitrary.
  • the uneven portion may be realized by only one convex portion or only one concave portion.
  • the size, groove depth, shape, etc. of the uneven portion 251 may be arbitrarily set so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
  • the light emitting device may be provided with any combination of the above lens and the above transparent cover.
  • the light emitting device may include lens 230 or lens 230B and light-transmitting cover 250A.
  • the lens may also include recesses 237 and 238.
  • the lens includes a first light attenuating portion such as the recess 237 and/or 238, and the light-transmitting cover reduces the light emitted toward the vehicle body 20 out of the light emitted from the lens.
  • a second light attenuating portion such as an uneven portion 251 that reduces at least a portion of the light may be provided. That is, the uneven portion 251 may be an example of a first light reduction portion or a second light reduction portion.
  • the second light attenuating portion that is, the uneven portion 251 includes, for example, a first surface 252 of the light-transmitting cover 250A on which the light emitted from the lens 230 or 230B enters, and a first surface 252 on which the light emitted from the light-transmitting cover 250A enters. It is provided on the first surface 252 of the second surface 253.
  • the second light attenuation section (in this modified example, uneven section 251) is provided in the optical path of the light emitted from light source 220, which passes through first total reflection surface 235 when light-emitting device 200 does not have a second light attenuation section.
  • uneven section 251 is provided in the optical path of the light emitted from light source 220, which passes through first total reflection surface 235 when light-emitting device 200 does not have a second light attenuation section.
  • Invention 1 is a light-emitting device supported on a support alongside an imaging device 300 that detects light emitted by the light-emitting device, the light-emitting device comprising: a light source 220; (i) a lens having an entrance surface 231 into which light emitted by the light source 220 is incident and a bowl-shaped portion 233 that widens as it moves away from the light source 220; and (ii) an exit surface 232 from which light incident on the entrance surface 231 is emitted and a convex portion 234 that protrudes in a direction away from the light source 220, the convex portion 234 being convex on at least one side of the exit surface 232.
  • the bowl-shaped portion 233 has a first total reflection surface 235 that totally reflects the light incident on the entrance surface 231, and the bowl-shaped portion 233 has a second total reflection surface 236 that totally reflects the light incident on the entrance surface 231, and the light-emitting device is equipped with a first light-reducing portion that reduces at least a portion of the light that is emitted toward the support body that is located in a direction that intersects with the optical axis of the light emitted by the light source 220, out of the light that is incident on the lens.
  • the light emitting device is, for example, the light emitting device 200, 200B, or 200C.
  • the lens is, for example, 230, 230B, or 230C.
  • the support body is, for example, a vehicle 10. More specifically, the light emitting device 200 is mounted on the side of the first support by a door mirror 30, which is an example of a second support supported by a vehicle body 20 included in the vehicle 10, which is an example of a first support. It is supported (arranged) alongside 300.
  • the first light reduction section reduces at least a portion of the light directed toward the first support (for example, the vehicle body 20).
  • the first light reduction portion is, for example, the recesses 237 and 238 or the uneven portion 251.
  • the inventors of the present application found that when light emitted from a light emitting device that has been reflected once on the support portion enters the imaging device 300, halation occurs due to the influence of the light. Ta. Therefore, according to the light emitting device according to Invention 1, even if the light emitting device uses a lens including the first total reflection surface 235 and the second total reflection surface 236, halation in the image generated by the imaging device 300 will not occur. The occurrence of can be suppressed.
  • the support may be a telephone pole or the like.
  • the first support is a columnar member such as a telephone pole that supports the second support on the side of the first support
  • the second support is a support that supports the light source unit
  • the second support is a support for a telephone pole. It may also be a street light (lighting fixture) attached to a pole.
  • the first light attenuation section is provided in the optical path of light that passes through the first total reflection surface 235 when the light emitting device does not include the first light attenuation section among the light emitted from the light source 220. It is the light emitting device according to invention 1.
  • an imaging device 300 detects light emitted from a light emitting device using a lens including a first total reflection surface 235 that reflects a part of light from a light source 220 and directs it toward the vehicle 10.
  • the occurrence of halation is particularly effectively suppressed.
  • Invention 3 is the light emitting device according to Invention 1 or 2, wherein the first light attenuation section is provided on the entrance surface 231.
  • the light emitting device according to the third invention is, for example, the light emitting device 200.
  • the first light attenuation section can more reliably reduce the light, compared to, for example, the case where the light emitted from the lens is attenuated. It can be easily controlled.
  • a fourth invention is the light emitting device according to the third invention, wherein the first light attenuation portion is a recess 237 provided in the entrance surface 231.
  • the first light attenuation part can be easily formed.
  • the first light-reducing portion may have a structure formed by texturing, vapor deposition, two-color molding, insert molding, or laser irradiation. These structures may attenuate the light directed towards the support.
  • Invention 5 is the light emitting device according to Invention 1 or 2, wherein the first light attenuation portion is provided on the first total reflection surface 235.
  • the light emitting device according to the fifth aspect of the invention is, for example, light emitting device 200B.
  • the first light-attenuating section is provided directly on the first total reflection surface 235, making it easier to more reliably control the light that is incident on the first light-attenuating section.
  • a sixth invention is the light emitting device according to the fifth invention, wherein the first light attenuation portion is a recess 238 provided in the first total reflection surface 235.
  • the first light attenuation portion can be formed on the lens more easily than with texturing or the like.
  • Invention 7 is the light emitting device according to Invention 1 or 2, further comprising a transparent cover through which light emitted from the lens is transmitted.
  • the light emitting device according to the seventh invention is, for example, the light emitting device 200C
  • the transparent cover according to the seventh invention is, for example, the transparent cover 250 or 250A.
  • the lens can be protected from flying objects from the outside by the light-transmitting cover.
  • Invention 8 is the light-emitting device described in invention 7, in which the translucent cover includes a first light-reducing section that reduces at least a portion of the light emitted from the lens toward the support.
  • the light-transmitting cover according to the eighth aspect of the invention is light-transmitting cover 250A, and the first light-reducing portion according to the eighth aspect of the invention is uneven portion 251.
  • the lens provided in the light-emitting device may be lens 230A.
  • the lens is made as a rotating body around the optical axis of the lens, for example, the light directed toward the support can be attenuated by the light-transmitting cover. Therefore, the lens can be easily created and the light directed toward the support can be reduced.
  • Invention 9 is the light-emitting device according to invention 8, in which the first light-reducing section is provided on the first surface 252 of the translucent cover, where the light emitted from the lens is incident, and the second surface 253 where the light is emitted from the translucent cover.
  • the lens includes a first light attenuation section
  • the light-transmitting cover includes a second light attenuation section that reduces at least part of the light emitted toward the support body among the light emitted from the lens.
  • the lens according to the tenth invention is the lens 230 or the lens 230B
  • the first light reduction part according to the tenth invention is the concave part 237 or 238, and the second light reduction part according to the tenth invention is the uneven part 251.
  • each component of the light emitting device according to the present invention may be realized by arbitrary combinations.
  • the light attenuation portions are provided at a plurality of locations, the light directed toward the support can be more reliably attenuated.
  • the second light attenuating portion includes a first surface 252 of the light-transmitting cover into which the light emitted from the lens is incident, and a second surface 253 through which the light is emitted from the light-transmitting cover.
  • the light emitting device according to invention 10 is provided on the first surface 252.
  • Invention 12 is a light source unit comprising the light emitting device according to any one of Inventions 1 to 11 and an imaging device 300.
  • the light source unit is, for example, the light source unit 100 that includes a light emitting device 200 and an imaging device 300, but may also be a light source unit that includes a light emitting device 200B and an imaging device 300, or a light source unit that includes a light emitting device 200C and an imaging device. 300, and may be realized using the light emitting device according to the present invention.
  • Invention 13 is a vehicle comprising the light source unit according to Invention 12 and serving as a support.
  • the vehicle is, for example, a vehicle 10 that includes a light source unit 100.
  • the vehicle may be a vehicle that includes a light source unit that includes the light emitting device 200B and the imaging device 300, or may include a light source unit that includes the light emitting device 200C and the imaging device 300. Any vehicle may be used as long as it includes a light source unit having the light emitting device and the imaging device 300 according to the above.
  • Invention 14 allows the light emitting device and the imaging device 300 to be easily placed in the vehicle so that the same effects as the above light emitting device are exhibited.
  • an LED is exemplified as a solid-state light-emitting element included in the light source
  • a semiconductor light-emitting element such as a semiconductor laser
  • a solid-state light-emitting element such as an organic EL (Electro Luminescence) element or an inorganic EL element may be employed.
  • the light source may be realized as an LED module with an SMD (Surface Mount Device) structure, or may be an LED module with a so-called COB (Chip On Board) structure in which an LED chip is directly mounted on a substrate.
  • SMD Surface Mount Device
  • COB Chip On Board
  • the thickness of the lens is not particularly limited, but may be, for example, 0.5 mm or more at the thinnest part. This improves the moldability of the lens.
  • the light attenuation part (the first light attenuation part and/or the second light attenuation part) is not a concave part and/or an uneven part, but is formed by, for example, texturing, vapor deposition, two-color molding, insert molding, or laser irradiation. It may also be a structure formed by.
  • the light-reducing portion may be formed by applying texture to the lens and/or the light-transmitting cover, thereby forming irregularities on the surface of the lens and/or the light-transmitting cover.
  • the light attenuation section reduces light by diffusing (scattering) the light.
  • a thin film such as a metal film is formed as a light-reducing portion on the surface of the lens and/or the light-transmitting cover. may be formed.
  • the light attenuation section reduces light by absorbing or reflecting light.
  • a portion that absorbs, reflects, or diffuses light is formed on the surface and/or inside of the lens and/or the transparent cover.
  • a light attenuation portion may be formed.
  • the light attenuation section reduces light by absorbing, reflecting, or diffusing light.
  • the surface and/or inside of the lens and/or the transparent cover may be colored to form a portion that absorbs light.
  • a light reduction portion may be formed.
  • the light attenuation section reduces light by absorbing light.
  • the light-attenuating portion may be formed by, for example, irradiating the lens and/or the light-transmitting cover with a laser to roughen the surface of the lens and/or the light-transmitting cover. Thereby, the light attenuation section reduces the light by scattering the light.
  • the light attenuation section may be realized by any combination of these configurations.
  • the light emitting device only needs to be able to irradiate light onto the road surface around the vehicle, and may be placed on a door mirror or on the outer surface of the vehicle body, such as an overhang surface.
  • the overhang surface is, for example, a lower portion of the vehicle body, and is a surface inclined with respect to the vertical direction.
  • the arrangement of the imaging device is also similar to that of the light emitting device.
  • the light source unit may include one imaging device or may include multiple imaging devices.
  • each component of the processing unit included in the control device that controls the light emitting device and the imaging device may be configured with hardware such as a dedicated circuit, or may be configured with a software program suitable for each component. It may be realized by Each component may be realized by a program execution unit such as a CPU (Central Processing Unit) or a processor reading and executing a software program recorded on a non-transitory recording medium such as a hard disk or semiconductor memory. .
  • a program execution unit such as a CPU (Central Processing Unit) or a processor reading and executing a software program recorded on a non-transitory recording medium such as a hard disk or semiconductor memory.
  • the present invention also includes forms obtained by applying various modifications to each embodiment and modification that a person skilled in the art would conceive, or forms realized by arbitrarily combining the components and functions of each embodiment and modification within the scope that does not deviate from the spirit of the present invention.
  • Vehicle 20 Vehicle body 30 Door mirror 100
  • Light source unit 200, 200A, 200B, 200C Light emitting device 220
  • Light source 230, 230A, 230B Lens 231 Incident surface 232
  • Output surface 233 Bowl-shaped portion 234 Convex portion 235
  • First total reflection surface 236 Second total reflection Surfaces 237, 238

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A light-emitting device (200) comprises a light source (220) and a lens (230) having: (i) a bowl-shaped portion (233) having an incident surface (231) on which the light emitted by the light source (220) is incident and becoming wider with increasing distance from the light source (220); and (ii) a protrusion portion (234) having an exit surface (232) from which the light incident on the incident surface (231) exits and protruding in a direction away from the light source (220). The protrusion portion (234) has a first total reflection surface (235) totally reflecting the light incident on the incident surface (231). The bowl-shaped portion (233) has a second total reflection surface (236) totally reflecting the light incident on the incident surface (231). The light-emitting device (200) comprises a first light reduction portion that reduces, among the light incident on the lens (230), at least part of the light emitted toward a support body positioned in a direction intersecting with the optical axis of the light emitted by the light source (220).

Description

発光装置、光源ユニット、および、車両Light emitting device, light source unit, and vehicle
　本発明は、発光装置、光源ユニット、および、車両に関する。 The present invention relates to a light emitting device, a light source unit, and a vehicle.
　従来、車両に配置され、光を照射する発光装置がある（例えば、特許文献１参照）。特許文献１には、車両のドアミラー（サイドミラー）に配置され、車両の外側の地面に光を用いて図柄を投射する装置が開示されている。 Conventionally, there is a light emitting device that is placed in a vehicle and emits light (see, for example, Patent Document 1). Patent Document 1 discloses a device that is disposed on a door mirror (side mirror) of a vehicle and projects a pattern onto the ground outside the vehicle using light.
特開２０１６－１３４３１３号公報Japanese Patent Application Publication No. 2016-134313
　例えば、ドアミラーには、光を出射する発光装置とともに、路面を撮像する撮像装置が配置される場合がある。この種の撮像装置は、発光装置から出射された光の路面や障害物などでの反射光を検出することで、路面を撮像する。この際に、例えば車両などで反射された光を撮像装置が検出すると、撮像装置が生成する画像にハレーションが発生することがある。 For example, a door mirror may be provided with a light emitting device that emits light and an imaging device that captures an image of the road surface. This type of imaging device captures an image of a road surface by detecting reflected light from a road surface, obstacles, etc. of light emitted from a light emitting device. At this time, if the imaging device detects light reflected by a vehicle or the like, halation may occur in the image generated by the imaging device.
　本発明は、撮像装置が生成する画像におけるハレーションを抑制できる発光装置などを提供する。 The present invention provides a light-emitting device that can suppress halation in images generated by an imaging device.
　本発明の一態様に係る発光装置は、発光装置が出射した光を検出する撮像装置と並んで支持体に支持される当該発光装置であって、光源と、（ｉ）前記光源が出射した光が入射される入射面を有し、前記光源から離れるにつれて広がる椀状部と、（ｉｉ）前記入射面に入射された光が出射される出射面を有し、前記光源から離れる方向に突出した凸部と、を有するレンズと、を備え、前記凸部は、前記出射面の少なくとも一部の面であって、前記入射面に入射された光を全反射する第１全反射面を有し、前記椀状部は、前記光源から出射された光の光軸と交差する方向に位置する面であって、前記入射面に入射された光を全反射する第２全反射面を有し、前記発光装置は、前記レンズに入射される光のうち、前記光源が出射した光の光軸と交差する方向に位置する前記支持体に向けて出射される光の少なくとも一部を減ずる第１減光部を備える。 A light-emitting device according to one aspect of the present invention is a light-emitting device supported by a support body along with an imaging device that detects light emitted by the light-emitting device, and includes a light source and (i) light emitted by the light source. (ii) has an entrance surface through which light enters, and a bowl-shaped portion that widens as it moves away from the light source; and (ii) an exit surface through which light incident on the entrance surface exits, and projects in a direction away from the light source. a lens having a convex portion, the convex portion having a first total reflection surface that is at least a part of the exit surface and totally reflects light incident on the input surface. , the bowl-shaped portion has a second total reflection surface that is located in a direction intersecting the optical axis of the light emitted from the light source and totally reflects the light incident on the incidence surface, The light emitting device includes a first attenuator that reduces at least a portion of the light that is incident on the lens and is emitted toward the support body located in a direction intersecting the optical axis of the light emitted from the light source. Equipped with a light section.
　本発明の一態様に係る光源ユニットは、上記記載の発光装置と、前記撮像装置と、を備える。 A light source unit according to one aspect of the present invention includes the light emitting device described above and the imaging device.
　本発明の一態様に係る車両は、記載上記記載の光源ユニットを備え、前記支持体である。 A vehicle according to one aspect of the present invention includes the light source unit described above, and is the support.
　本発明の一態様に係る発光装置などによれば、撮像装置が生成する画像におけるハレーションを抑制できる。 The light emitting device according to one aspect of the present invention can suppress halation in images generated by an imaging device.
図１は、実施の形態に係る車両を示す正面図である。FIG. 1 is a front view showing a vehicle according to an embodiment. 図２は、実施の形態に係る光源ユニットの構成を示す断面図である。FIG. 2 is a sectional view showing the configuration of the light source unit according to the embodiment. 図３は、実施の形態に係る発光装置の構成を示す断面図である。FIG. 3 is a cross-sectional view showing the configuration of the light emitting device according to the embodiment. 図４は、比較例に係る発光装置における光の進み方を説明するための断面図である。FIG. 4 is a cross-sectional view for explaining how light travels in a light emitting device according to a comparative example. 図５は、変形例１に係る発光装置の構成を示す断面図である。FIG. 5 is a cross-sectional view showing the configuration of a light emitting device according to the first modification. 図６は、変形例２に係る発光装置の構成を示す断面図である。FIG. 6 is a sectional view showing the configuration of a light emitting device according to Modification Example 2.
　以下、本発明の実施の形態について、図面を参照しながら説明する。なお、以下で説明する実施の形態は、いずれも包括的または具体的な例を示すものである。以下の実施の形態で示される数値、形状、材料、構成要素、構成要素の配置位置および接続形態などは、一例であり、本発明を限定する主旨ではない。また、以下の実施の形態における構成要素のうち、独立請求項に記載されていない構成要素については、任意の構成要素として説明される。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are all inclusive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples, and do not limit the present invention. Further, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims will be described as arbitrary constituent elements.
　なお、各図は模式図であり、必ずしも厳密に図示されたものではない。したがって、例えば、各図において縮尺などは必ずしも一致しない。また、各図は、本発明を示すために適宜強調や省略、比率の調整を行った模式的な図となっており、実際の形状や位置関係、比率とは異なる場合がある。また、各図において、実質的に同一の構成に対しては同一の符号を付しており、重複する説明は省略または簡略化される場合がある。 Note that each figure is a schematic diagram and is not necessarily a precise illustration. Therefore, for example, the scales of each figure do not necessarily match. Furthermore, each figure is a schematic diagram in which emphasis, omissions, and ratios have been appropriately adjusted in order to illustrate the present invention, and may differ from the actual shapes, positional relationships, and ratios. Furthermore, in each figure, substantially identical configurations are given the same reference symbols, and duplicate explanations may be omitted or simplified.
　また、以下の実施の形態において、Ｚ軸方向は、例えば鉛直方向であり、また、Ｚ軸の正方向側は、上方と記載され、Ｚ軸の負方向側は、下方と記載される場合がある。また、Ｙ軸方向およびＸ軸方向は、Ｚ軸に垂直な平面（水平面）上において、互いに直交する方向である。また、Ｙ軸方向は、車両の側方と記載される場合がある。また、Ｘ軸正方向は、車両の進行する方向（前方）と記載され、Ｘ軸負方向は、車両の進行する方向とは反対側の方向（後方）と記載される場合がある。 Furthermore, in the following embodiments, the Z-axis direction is, for example, a vertical direction, and the positive direction of the Z-axis is sometimes described as upward, and the negative direction of the Z-axis is sometimes described as downward. be. Further, the Y-axis direction and the X-axis direction are directions perpendicular to each other on a plane (horizontal plane) perpendicular to the Z-axis. Moreover, the Y-axis direction may be described as the side of the vehicle. Further, the positive direction of the X-axis may be described as the direction in which the vehicle travels (forward), and the negative direction of the X-axis may be described as the direction opposite to the direction in which the vehicle travels (rearward).
　また、本明細書において、同じなどの要素間の関係性を示す用語、ならびに、数値、及び、数値範囲は、厳格な意味のみを表す表現ではなく、実質的に同等な範囲、例えば数％程度（例えば、５％程度）の差異をも含むことを意味する表現である。例えば、「水平方向」とは、完全に水平方向である場合だけでなく、製造または配置の際に生じる例えば５％などの数％程度の誤差を含むことを意味する。 In addition, in this specification, terms indicating relationships between elements such as the same, numerical values, and numerical ranges are not expressions that express only strict meanings, but are expressions that indicate a substantially equivalent range, such as a few percent. This expression means that it also includes a difference of about 5% (for example, about 5%). For example, "horizontal direction" means not only a completely horizontal direction, but also includes an error of several percent, such as 5%, that occurs during manufacturing or placement.
　また、本明細書において、「第一」、「第二」などの序数詞は、特に断りのない限り、構成要素の数または順序を意味するものではなく、同種の構成要素の混同を避け、構成要素を区別する目的で用いられている。 In addition, in this specification, ordinal numbers such as "first" and "second" do not mean the number or order of components, unless otherwise specified, and to avoid confusion between similar components, It is used to distinguish between elements.
　（実施の形態）
　［構成］
　＜車両および光源ユニット＞
　図１は、実施の形態に係る車両１０を示す正面図である。なお、図１においては、発光装置２００が出射する光（出射光）を破線で示している。 (Embodiment)
[composition]
<Vehicle and light source unit>
FIG. 1 is a front view showing a vehicle 10 according to an embodiment. Note that in FIG. 1, light emitted by the light emitting device 200 (emitted light) is shown by a broken line.
　車両１０は、光源ユニット１００を備える自動車またバイクなどの移動体である。本実施の形態では、車両１０は、自動車である。車両１０は、支持体の一例である。 The vehicle 10 is a moving object such as a car or a motorcycle that includes a light source unit 100. In this embodiment, vehicle 10 is an automobile. Vehicle 10 is an example of a support.
　車両１０は、車体２０と、ドアミラー３０と、光源ユニット１００と、を備える。 The vehicle 10 includes a vehicle body 20, a door mirror 30, and a light source unit 100.
　車体２０は、側方部分にドアミラー３０が取り付けられ、ドライバが乗り込み運転する車両本体である。車体２０は、車体２０の両側側方部分でドアミラー３０を支持する。 The vehicle body 20 has door mirrors 30 attached to its side portions, and is a vehicle body on which a driver gets in and drives the vehicle. The vehicle body 20 supports door mirrors 30 at both side portions of the vehicle body 20.
　ドアミラー３０は、車体２０の側方部分に取り付けられるサイドミラーである。本実施の形態では、ドアミラー３０には、光源ユニット１００が配置されている。具体的には、ドアミラー３０には、発光装置２００と撮像装置３００とが取り付けられている。本実施の形態では、ドアミラー３０には、車体２０から近い順に発光装置２００と撮像装置３００とがこの順に並んで取り付けられている。 The door mirror 30 is a side mirror attached to a side portion of the vehicle body 20. In this embodiment, a light source unit 100 is arranged in the door mirror 30. Specifically, a light emitting device 200 and an imaging device 300 are attached to the door mirror 30. In the present embodiment, the light emitting device 200 and the imaging device 300 are attached to the door mirror 30 in the order of distance from the vehicle body 20.
　なお、本実施の形態では、車両１０は、車体２０の側方両側（Ｙ軸方向両側）に位置するドアミラー３０のそれぞれに発光装置２００と撮像装置３００とを備えるが、一方のドアミラー３０にのみ発光装置２００と撮像装置３００とが備えられてもよい。 In this embodiment, the vehicle 10 includes the light emitting device 200 and the imaging device 300 in each of the door mirrors 30 located on both sides of the vehicle body 20 (both sides in the Y-axis direction), but only one of the door mirrors 30 includes the light emitting device 200 and the imaging device 300. A light emitting device 200 and an imaging device 300 may be included.
　また、ドアミラー３０には、車体２０から近い順に撮像装置３００と発光装置３００とがこの順に並んで取り付けられている。 Furthermore, an imaging device 300 and a light emitting device 300 are attached to the door mirror 30 in the order of distance from the vehicle body 20.
　光源ユニット１００は、光を車両１０の周囲に位置する路面に向けて出射し、当該光が路面で反射された反射光を検出する光学ユニットである。つまり、光源ユニット１００は、路面に光を出射して路面を撮像する。 The light source unit 100 is an optical unit that emits light toward a road surface located around the vehicle 10 and detects reflected light that is reflected from the road surface. That is, the light source unit 100 emits light onto the road surface and images the road surface.
　光源ユニット１００は、発光装置２００と、撮像装置３００と、を備える。 The light source unit 100 includes a light emitting device 200 and an imaging device 300.
　光源ユニット１００が備える発光装置２００と撮像装置３００とは、例えば、車両１０の外面に配置されている。具体的には、発光装置２００は、下方に光を照射した場合に、車両１０の周囲の路面に光を照射できる位置で、車両１０に取り付けられている。本実施の形態では、光源ユニット１００は、ドアミラー３０に配置される。 The light emitting device 200 and the imaging device 300 included in the light source unit 100 are arranged on the outer surface of the vehicle 10, for example. Specifically, the light emitting device 200 is attached to the vehicle 10 at a position where the light emitting device 200 can irradiate light onto the road surface around the vehicle 10 when the light is emitted downward. In this embodiment, the light source unit 100 is arranged on the door mirror 30.
　なお、外面とは、車体２０の外面を示すだけでなく、車体２０に取り付けられた構成要素の外面、例えば、ドアミラー３０の側面もしくは下面などの外面、または、車両１０が備えるドアの外面なども含む。また、車両１０が発光装置２００と撮像装置３００とを外面に備えるとは、発光装置２００と撮像装置３００とが外面表面に配置されている場合だけでなく、外面近傍であって、且つ、車両１０の内部に配置されている場合も含む。 Note that the term "outer surface" refers not only to the outer surface of the vehicle body 20, but also to the outer surface of a component attached to the vehicle body 20, such as the outer surface of the side or lower surface of the door mirror 30, or the outer surface of a door included in the vehicle 10. include. Further, when the vehicle 10 is provided with the light emitting device 200 and the imaging device 300 on the outer surface, it does not mean that the light emitting device 200 and the imaging device 300 are arranged on the outer surface, but also when the light emitting device 200 and the imaging device 300 are disposed on the outer surface of the vehicle. 10 is also included.
　発光装置２００は、発光装置２００が出射した光を検出する撮像装置３００と並んで車両１０（より具体的には、車両１０が備えるドアミラー３０）に支持される光源部である。 The light emitting device 200 is a light source section that is supported by the vehicle 10 (more specifically, the door mirror 30 included in the vehicle 10) along with the imaging device 300 that detects the light emitted by the light emitting device 200.
　発光装置２００は、撮像装置３００とともに車両１０に取り付けられ、路面に光を出射する。本実施の形態では、発光装置２００は、近赤外光を出射する。 The light emitting device 200 is attached to the vehicle 10 together with the imaging device 300, and emits light onto the road surface. In this embodiment, light emitting device 200 emits near-infrared light.
　発光装置２００が出射する近赤外光は、例えば、波長帯域が８００ｎｍ以上の光である。発光装置２００が出射する近赤外光は、波長帯域が９１０ｎｍ～９７０ｎｍでもよい。太陽光は、波長が９４０ｎｍ程度の光の強度が他の波長帯域と比較して弱い。そのため、発光装置２００が出射する近赤外光の波長帯域が９４０±３０ｎｍであれば、撮像装置３００の光の検出波長が９４０ｎｍ程度であっても撮像装置３００によって精度よく路面が撮像され得る。 The near-infrared light emitted by the light-emitting device 200 is, for example, light with a wavelength band of 800 nm or more. The near-infrared light emitted by the light-emitting device 200 may have a wavelength band of 910 nm to 970 nm. The intensity of sunlight with a wavelength of about 940 nm is weaker than other wavelength bands. Therefore, if the wavelength band of the near-infrared light emitted by the light-emitting device 200 is 940±30 nm, the road surface can be accurately captured by the imaging device 300 even if the light detection wavelength of the imaging device 300 is about 940 nm.
　また、本実施の形態では、発光装置２００は、ドアミラー３０に取り付けられる。具体的には、発光装置２００は、ドアミラー３０の下方に取り付けられる。 Furthermore, in this embodiment, the light emitting device 200 is attached to the door mirror 30. Specifically, the light emitting device 200 is attached below the door mirror 30.
　なお、本実施の形態では、発光装置２００は、後述する図２に示すように出射する光の光軸（図２に示す一点鎖線）が鉛直方向となるようにドアミラー３０に取り付けられているが、出射する光の光軸が、鉛直方向（より具体的には、車両１０が位置する路面の法線方向）に対して傾斜するように車両１０（例えば、車体２０および／またはドアミラー３０）に取り付けられていてもよい。例えば、発光装置２００は、光軸が鉛直方向に対して１０°～２０°程度傾斜されて、車体２０とは反対側に光を出射するようにドアミラー３０に取り付けられていてもよい。 In this embodiment, the light emitting device 200 is attached to the door mirror 30 so that the optical axis of the emitted light (dashed line in FIG. 2) is vertical as shown in FIG. 2 described later, but the light emitting device 200 may be attached to the vehicle 10 (e.g., the vehicle body 20 and/or the door mirror 30) so that the optical axis of the emitted light is inclined relative to the vertical direction (more specifically, the normal direction of the road surface on which the vehicle 10 is located). For example, the light emitting device 200 may be attached to the door mirror 30 so that the optical axis is inclined by about 10° to 20° relative to the vertical direction and emits light on the opposite side to the vehicle body 20.
　また、本実施の形態では、発光装置２００は、車両１０の側方に位置する路面に向けて光を出射するが、車両１０の前方領域および／または後方領域の路面に光を出射してもよい。 Further, in the present embodiment, the light emitting device 200 emits light toward the road surface located on the side of the vehicle 10, but it may also emit light toward the road surface in the front region and/or rear region of the vehicle 10. good.
　発光装置２００は、例えば、少なくとも水平方向より上側には光を出射しないようにドアミラー３０に配置されている。 For example, the light emitting device 200 is arranged on the door mirror 30 so as not to emit light at least above the horizontal direction.
　なお、発光装置２００は、撮像装置３００より鉛直下方側に配置されていてもよい。これにより、発光装置２００が下方に向けて光を出射するように車両１０に配置されることで、発光装置２００からの光が撮像装置３００に直接入射されることを抑制できる。 Note that the light emitting device 200 may be arranged vertically below the imaging device 300. Thereby, by disposing the light emitting device 200 in the vehicle 10 so as to emit light downward, it is possible to suppress the light from the light emitting device 200 from directly entering the imaging device 300.
　撮像装置３００は、路面を撮像するカメラである。具体的には、撮像装置３００は、発光装置２００から出射されて路面で反射された光を検出する。つまり、具体的には、撮像装置３００は、発光装置２００が出射して路面で反射された光を検出できるようにドアミラー３０に取り付けられている。撮像装置３００は、車両１０の周囲の路面で反射された光を検出することで、当該路面の画像を生成する。上記したように、発光装置２００は、例えば、近赤外光を出射する近赤外光源であり、撮像装置３００は、発光装置２００から出射された近赤外光、具体的には、発光装置２００から出射されて路面で反射された近赤外光を検出する。 The imaging device 300 is a camera that images the road surface. Specifically, the imaging device 300 detects the light emitted from the light emitting device 200 and reflected on the road surface. That is, specifically, the imaging device 300 is attached to the door mirror 30 so that the light emitted by the light emitting device 200 and reflected on the road surface can be detected. The imaging device 300 generates an image of the road surface by detecting light reflected from the road surface around the vehicle 10 . As described above, the light-emitting device 200 is, for example, a near-infrared light source that emits near-infrared light, and the imaging device 300 is a near-infrared light source that emits near-infrared light, and the imaging device 300 is a near-infrared light source that emits near-infrared light. Near-infrared light emitted from 200 and reflected on the road surface is detected.
　撮像装置３００は、例えば、ＣＣＤ（Ｃｈａｒｇｅ　Ｃｏｕｐｌｅｄ　Ｄｅｖｉｃｅ）イメージセンサ、ＣＭＯＳ（Ｃｏｍｐｌｅｍｅｎｔａｒｙ　Ｍｅｔａｌ　Ｏｘｉｄｅ　Ｓｅｍｉｃｏｎｄｕｃｔｏｒ）イメージセンサなどの撮像素子を有する。 The imaging device 300 includes an imaging element such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor.
　また、本実施の形態では、車体２０と、発光装置２００と、撮像装置３００とは、この順に並んで配置されている。車体２０と、撮像装置３００と、発光装置２００とは、この順に並んで配置されていてもよい。 Furthermore, in this embodiment, the vehicle body 20, the light emitting device 200, and the imaging device 300 are arranged in this order. The vehicle body 20, the imaging device 300, and the light emitting device 200 may be arranged in this order.
　また、撮像装置３００は、発光装置２００よりも、発光装置２００が光を出射する向き（本実施の形態では、下方であってＺ軸負方向）とは反対側に位置してもよい。つまり、撮像装置３００は、発光装置２００よりも上方に位置してもよい。本実施の形態では、撮像装置３００は、発光装置２００よりも上方に位置する。 Furthermore, the imaging device 300 may be located on the opposite side of the light emitting device 200 from the direction in which the light emitting device 200 emits light (in the present embodiment, downward and in the negative Z-axis direction). That is, the imaging device 300 may be located above the light emitting device 200. In this embodiment, the imaging device 300 is located above the light emitting device 200.
　これによれば、撮像装置３００に発光装置２００から出射されたが路面で反射されずに直接入射されることが抑制される。 According to this, the light emitted from the light emitting device 200 is prevented from being directly incident on the imaging device 300 without being reflected on the road surface.
　また、光源ユニット１００は、撮像装置３００と発光装置２００との間に位置し、発光装置２００が出射した光を遮光する遮光部を備えてもよい。当該遮光部は、当該光を遮光する機能を有していればよく、当該光に対して反射性を有していてもよいし、当該光に対して吸収性を有していてもよい。 Furthermore, the light source unit 100 may include a light shielding section that is located between the imaging device 300 and the light emitting device 200 and blocks the light emitted by the light emitting device 200. The light shielding portion may have a function of blocking the light, and may have a reflective property for the light, or may have an absorptive property for the light.
　また、車両１０には、発光装置２００および撮像装置３００を制御する制御装置が配置されていてもよい。制御装置は、例えば、発光装置２００による光の光出射のタイミングと撮像装置３００による撮影タイミングとを揃えるように制御する。つまり、制御装置は、発光装置２００が出射した光が路面で反射された反射光を撮像装置３００が適切に検出できるように、発光装置２００と撮像装置３００とを同期させて制御する。制御装置は、例えば、撮像装置３００と同期させて発光装置２００をＰＷＭ（Ｐｕｌｓｅ　ｗｉｔｈ　Ｍｏｄｕｌａｔｉｏｎ）制御（ＰＷＭ点灯）する。 Additionally, a control device that controls the light emitting device 200 and the imaging device 300 may be disposed in the vehicle 10. For example, the control device performs control so that the timing of light emission by the light emitting device 200 and the timing of photographing by the imaging device 300 are aligned. In other words, the control device synchronizes and controls the light emitting device 200 and the imaging device 300 so that the imaging device 300 can appropriately detect the reflected light obtained by reflecting the light emitted by the light emitting device 200 on the road surface. The control device performs PWM (Pulse with Modulation) control (PWM lighting) of the light emitting device 200 in synchronization with the imaging device 300, for example.
　制御装置は、例えば、発光装置２００および撮像装置３００を制御するための制御線などが接続されるインターフェース、プログラムが格納された不揮発性メモリ、プログラムを実行するための一時的な記憶領域である揮発性メモリ、プログラムを実行するプロセッサなどで実現される。 The control device includes, for example, an interface to which control lines for controlling the light emitting device 200 and the imaging device 300 are connected, a nonvolatile memory in which a program is stored, and a volatile memory that is a temporary storage area for executing the program. It is realized by physical memory, a processor that executes programs, etc.
　＜発光装置＞
　続いて、発光装置２００の具体的な構成について説明する。 <Light-emitting device>
Next, a specific configuration of the light emitting device 200 will be described.
　図２は、実施の形態に係る発光装置２００を示す断面図である。なお、図２は、車両１０を正面から見た場合における右側に位置するドアミラー３０に配置された発光装置２００および撮像装置３００の断面を示す図である。 FIG. 2 is a cross-sectional view showing a light emitting device 200 according to an embodiment. Note that FIG. 2 is a diagram showing a cross section of the light emitting device 200 and the imaging device 300 arranged on the door mirror 30 located on the right side when the vehicle 10 is viewed from the front.
　発光装置２００は、蓋部２１０と、端子部２１３と、パッキン２１４と、ヒートシンク２１５と、放熱シート２１６と、緩衝材２１７と、光源２２０と、レンズ２３０と、基板２４０と、透光カバー２５０と、を備える。 The light emitting device 200 includes a lid part 210, a terminal part 213, a packing 214, a heat sink 215, a heat dissipation sheet 216, a buffer material 217, a light source 220, a lens 230, a substrate 240, and a transparent cover 250. , is provided.
　蓋部２１０は、発光装置２００をドアミラー３０に取り付けるための蓋体である。蓋部２１０には、取付部２１１が形成されており、取付部２１１には、例えば、ねじ２１２が取り付けられるためのねじ穴が形成されている。取付部２１１にねじ２１２が螺合されることで、発光装置２００は、ドアミラー３０に取り付けられる。蓋部２１０の材料は、特に限定されないが、例えば、ＰＢＴ（ＰｏｌｙＢｕｔｙｌｅｎｅｔｅｒｅｐｈｔａｌａｔｅ）若しくはポリカーボネートなどの樹脂材料、または、金属材料などが採用される。 The lid portion 210 is a cover body for attaching the light emitting device 200 to the door mirror 30. The lid portion 210 is formed with an attachment portion 211, and the attachment portion 211 is formed with a screw hole for attaching, for example, a screw 212. The light emitting device 200 is attached to the door mirror 30 by screwing the screw 212 into the attachment portion 211. The material of the lid portion 210 is not particularly limited, but for example, a resin material such as PBT (Polybutyleneterephthalate) or polycarbonate, or a metal material is used.
　端子部２１３は、図示しない外部電源などから供給される電力を光源２２０に供給するための端子である。端子部２１３と光源２２０とは、図示しない金属配線などにより電気的に接続されている。 The terminal portion 213 is a terminal for supplying power from an external power source (not shown) to the light source 220. The terminal portion 213 and the light source 220 are electrically connected by metal wiring (not shown) or the like.
　パッキン２１４は、レンズ２３０とヒートシンク２１５との間に位置する緩衝材である。パッキン２１４は、例えば、ゴムなどの弾性を有する樹脂材料により形成されている。 The packing 214 is a buffer material located between the lens 230 and the heat sink 215. The packing 214 is made of, for example, an elastic resin material such as rubber.
　ヒートシンク２１５は、基板２４０における光源２２０が配置される面である主面２４１とは反対側の面である裏面２４２側に配置され、光源２２０で発生した熱を放熱するための放熱部材である。本実施の形態では、ヒートシンク２１５は、蓋部２１０に支持されている。ヒートシンク２１５には、例えば、熱伝導性の高いアルミニウム金属、ステンレス鋼などが採用される。ヒートシンク２１５には、放熱シート２１６を介して基板２４０が載置されている。 The heat sink 215 is a heat radiating member that is disposed on the back surface 242 side of the substrate 240, which is the surface opposite to the main surface 241, which is the surface on which the light source 220 is disposed, and radiates the heat generated by the light source 220. In this embodiment, heat sink 215 is supported by lid portion 210. The heat sink 215 is made of, for example, aluminum metal, stainless steel, or the like, which has high thermal conductivity. A substrate 240 is placed on the heat sink 215 with a heat dissipation sheet 216 interposed therebetween.
　放熱シート２１６は、光源２２０で発生した熱を基板２４０からヒートシンク２１５に放熱させやすくするためのシート状の部材である。放熱シート２１６に採用される材料は、特に限定されず、例えば、樹脂材料などが採用される。また、放熱シート２１６は、電気的絶縁性を有していてもよい。 The heat dissipation sheet 216 is a sheet-like member that facilitates dissipation of heat generated by the light source 220 from the substrate 240 to the heat sink 215. The material used for the heat dissipation sheet 216 is not particularly limited, and for example, a resin material may be used. Further, the heat dissipation sheet 216 may have electrical insulation properties.
　緩衝材２１７は、ドアミラー３０とレンズ２３０との間に配置される部材である。緩衝材２１７は、例えば、スポンジなどの弾性を有する部材である。 The cushioning material 217 is a member placed between the door mirror 30 and the lens 230. The cushioning material 217 is, for example, an elastic member such as a sponge.
　光源２２０は、光を出射する光源である。光源２２０は、例えば、近赤外光を出射する。光源２２０は、例えば、ＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）などの固体半導体光源と、当該固体半導体光源を覆うレンズと、を有する。 The light source 220 is a light source that emits light. The light source 220 emits, for example, near-infrared light. The light source 220 includes, for example, a solid-state semiconductor light source such as an LED (Light Emitting Diode), and a lens that covers the solid-state semiconductor light source.
　レンズ２３０は、光源２２０が出射した光が入射され、且つ、入射された光を出射する光学部材である。具体的には、レンズ２３０は、光源２２０の下方を覆うように配置され、光源２２０が出射した光が入射され、入射された光の配光を制御して路面に向けて出射する投光用レンズである。レンズ２３０（より具体的には、レンズ２３０の母材）は、例えば、透光性を有するガラス材料またはアクリル若しくはポリカーボネートなどの透明樹脂材料によって形成される。本実施の形態では、光源２２０が出射する光の光軸と、レンズ２３０の光軸とが一致するようにそれぞれ基板２４０に載置（配置）されている。レンズ２３０は、例えば、基板２４０の主面２４１に接着剤などによって取り付けられている。 The lens 230 is an optical member into which the light emitted by the light source 220 is incident, and which emits the incident light. Specifically, the lens 230 is arranged to cover the lower part of the light source 220, receives the light emitted from the light source 220, controls the light distribution of the incident light, and emits the light toward the road surface. It's a lens. The lens 230 (more specifically, the base material of the lens 230) is formed of, for example, a transparent glass material or a transparent resin material such as acrylic or polycarbonate. In this embodiment, the light source 220 is mounted (arranged) on the substrate 240 so that the optical axis of the light emitted from the lens 230 coincides with the optical axis of the lens 230. The lens 230 is attached to the main surface 241 of the substrate 240 with an adhesive or the like, for example.
　レンズ２３０の構造の詳細については、後述する。 The details of the structure of the lens 230 will be described later.
　基板２４０は、光源２２０が載置される基板である。基板２４０は、光源２２０が載置される主面２４１でレンズ２３０と接触して配置されている。基板２４０の材料は、特に限定されないが、例えば、金属基板、セラミック基板、樹脂基板などが採用される。なお、基板２４０は、フレキシブル基板でもよいし、リジッド基板でもよい。 The substrate 240 is a substrate on which the light source 220 is placed. The substrate 240 is arranged in contact with the lens 230 at the main surface 241 on which the light source 220 is placed. The material of the substrate 240 is not particularly limited, but may be, for example, a metal substrate, a ceramic substrate, or a resin substrate. The substrate 240 may be a flexible substrate or a rigid substrate.
　発光装置２００は、光源２２０が出射する光の光軸が鉛直方向と平行となるようにドアミラー３０に取り付けられてよいし、光源２２０が出射する光の光軸が鉛直方向に対して交差するように配置されてもよい。発光装置２００は、例えば、光源２２０が出射する光が車体２０から遠ざかる方向に出射されるように配置されてもよい。 The light-emitting device 200 may be attached to the door mirror 30 so that the optical axis of the light emitted by the light source 220 is parallel to the vertical direction, or may be arranged so that the optical axis of the light emitted by the light source 220 intersects with the vertical direction. The light-emitting device 200 may be arranged, for example, so that the light emitted by the light source 220 is emitted in a direction away from the vehicle body 20.
　透光カバー２５０は、レンズ２３０を覆うカバー部材である。また、透光カバー２５０は、光源２２０が出射する光に対する透光性（例えば、当該光を９０％以上透過する性質）を有する。つまり、透光カバー２５０は、レンズ２３０から出射された光が透過される。 The light-transmitting cover 250 is a cover member that covers the lens 230. Further, the light-transmitting cover 250 has a property of transmitting light emitted by the light source 220 (for example, a property of transmitting 90% or more of the light). That is, the light emitted from the lens 230 is transmitted through the light-transmitting cover 250.
　本実施の形態では、透光カバー２５０は、下方に突出し、且つ、上方が開放した椀状である。光源２２０、レンズ２３０、および、基板２４０は、透光カバー２５０に収容されている。透光カバー２５０の上方は蓋部２１０によって閉じられている。透光カバー２５０（より具体的には、透光カバー２５０の母材）は、例えば、透光性を有するガラス材料またはアクリル若しくはポリカーボネートなどの透明樹脂材料によって形成される。 In this embodiment, the light-transmitting cover 250 has a bowl shape that projects downward and is open at the top. The light source 220, lens 230, and substrate 240 are housed in a transparent cover 250. The upper part of the transparent cover 250 is closed by the lid part 210. The light-transmitting cover 250 (more specifically, the base material of the light-transmitting cover 250) is formed of, for example, a transparent glass material or a transparent resin material such as acrylic or polycarbonate.
　なお、本実施の形態において、透光カバー２５０の形状は、下方に突出した凸形状であるが、特に限定されるものではなく、例えば、平面形状でもよい。 Note that in this embodiment, the shape of the light-transmitting cover 250 is a convex shape projecting downward, but is not particularly limited, and may be a planar shape, for example.
　なお、透光カバー２５０は、入射された光を屈折などさせるいわゆるレンズの機能を入していてもよい。透光カバー２５０の曲率半径（例えば、透光カバー２５０の内面の曲率半径および透光カバー２５０の外面の曲率半径）は、任意に設定されてもよい。例えば、透光カバー２５０の内面および外面の曲率半径は、それぞれ、１０ｍ以下でもよい。 Note that the light-transmitting cover 250 may have a so-called lens function that refracts incident light. The radius of curvature of the light-transmitting cover 250 (for example, the radius of curvature of the inner surface of the light-transmitting cover 250 and the radius of curvature of the outer surface of the light-transmitting cover 250) may be set arbitrarily. For example, the radius of curvature of the inner and outer surfaces of the light-transmitting cover 250 may each be 10 m or less.
　＜レンズ＞
　続いて、レンズ２３０の具体的な構造について説明する。 <Lens>
Next, the specific structure of the lens 230 will be described.
　図３は、実施の形態に係る発光装置２００の構成を示す断面図である。なお、図３においては、発光装置２００が備える複数の構成要素のうち、光源２２０、レンズ２３０、基板２４０、および、透光カバー２５０を拡大して示している。また、図３では、光源２２０から出射される光を破線矢印で示している。 FIG. 3 is a cross-sectional view showing the configuration of the light emitting device 200 according to the embodiment. Note that, in FIG. 3, among the plurality of components included in the light emitting device 200, a light source 220, a lens 230, a substrate 240, and a light-transmitting cover 250 are shown in an enlarged manner. Furthermore, in FIG. 3, the light emitted from the light source 220 is indicated by a broken line arrow.
　レンズ２３０は、椀状部２３３と、椀状部２３３と一体に形成され、椀状部２３３から光源２２０とは反対側に突出する凸部２３４と、を備える。 The lens 230 includes a bowl-shaped portion 233 and a convex portion 234 that is formed integrally with the bowl-shaped portion 233 and protrudes from the bowl-shaped portion 233 to the side opposite to the light source 220.
　椀状部２３３は、光源２２０が出射した光が入射される入射面２３１を有し、光源２２０から離れるにつれて広がる形状を有する。また、椀状部２３３は、光源２２０から出射された光の光軸と交差する方向に位置する面（つまり、側面）であって、入射面２３１に入射された光を全反射する第２全反射面２３６を有する。つまり、光源２２０から出射された光であって入射面２３１に入射された光のうち、第２全反射面２３６に向かう光は、第２全反射面で全反射される。 The bowl-shaped portion 233 has an entrance surface 231 into which the light emitted by the light source 220 is incident, and has a shape that widens as it moves away from the light source 220. Further, the bowl-shaped portion 233 is a surface (that is, a side surface) located in a direction intersecting the optical axis of the light emitted from the light source 220, and is a second total surface that totally reflects the light incident on the incident surface 231. It has a reflective surface 236. That is, among the light emitted from the light source 220 and incident on the entrance surface 231, the light directed toward the second total reflection surface 236 is totally reflected by the second total reflection surface.
　本実施の形態では、入射面２３１は、光源２２０とは反対側に凹んだ形状となっている。 In this embodiment, the entrance surface 231 has a concave shape on the side opposite to the light source 220.
　凸部２３４は、入射面２３１に入射された光が出射される出射面２３２を有し、光源２２０から離れる方向に突出した形状を有する。また、凸部２３４は、出射面２３２の少なくとも一部の面であって、入射面２３１に入射された光を全反射する第１全反射面２３５を有する。例えば、凸部２３４の頂部が、光源２２０が出射した光の光軸と重なるように、光源２２０およびレンズ２３０が配置される。 The convex portion 234 has an exit surface 232 from which the light incident on the entrance surface 231 is output, and has a shape that projects in a direction away from the light source 220. Further, the convex portion 234 has a first total reflection surface 235 that is at least a part of the output surface 232 and totally reflects the light incident on the entrance surface 231. For example, the light source 220 and the lens 230 are arranged such that the top of the convex portion 234 overlaps with the optical axis of the light emitted by the light source 220.
　出射面２３２は、例えば、椀状部２３３における光源２２０とは反対側に位置する面と、第１全反射面２３５とからなる。 The output surface 232 is composed of, for example, a surface of the bowl-shaped portion 233 located on the opposite side of the light source 220 and a first total reflection surface 235.
　ここで、発光装置２００は、レンズ２３０に入射される光のうち、光源２２０が出射した光の光軸と交差する方向（本実施の形態では、光源２２０から見てＹ軸負方向）に位置する車体２０に向けて出射される光の少なくとも一部を減ずる減光部（第１減光部）を備える。 Here, the light emitting device 200 is located in a direction intersecting the optical axis of the light emitted by the light source 220 (in the negative Y-axis direction as seen from the light source 220 in this embodiment) out of the light incident on the lens 230. The vehicle body 20 includes a light attenuation section (first light attenuation section) that reduces at least part of the light emitted toward the vehicle body 20.
　本実施の形態では、発光装置２００は、第１減光部として凹部２３７を備える。凹部２３７は、レンズ２３０から出射される光のうち、車体２０に向けて出射される光の少なくとも一部を減ずる。 In the present embodiment, the light emitting device 200 includes a recess 237 as a first light attenuation section. The recess 237 reduces at least a portion of the light emitted from the lens 230 toward the vehicle body 20 .
　凹部２３７は、入射面２３１に設けられている凹部である。例えば、凹部２３７は、光源２２０から見て（言い換えると、光軸から見て）入射面２３１における車体２０とは反対側に設けられている。凹部２３７が設けられることによって、レンズ２３０は、非回転体となっている。 The recess 237 is a recess provided in the entrance surface 231. For example, the recess 237 is provided on the side of the entrance surface 231 opposite to the vehicle body 20 when viewed from the light source 220 (in other words, when viewed from the optical axis). By providing the recess 237, the lens 230 becomes a non-rotating body.
　図４は、比較例に係る発光装置２００Ａにおける光の進み方を説明するための断面図である。なお、図４に示す発光装置２００Ａの断面は、図３に示す発光装置２００の断面に対応する位置の断面である。また、図４では、光源２２０から出射される光を破線矢印で示している。また、図３に示す光源２２０からの光の出射方向と、図４に示す光源２２０からの光の出射方向とは、同じである。 FIG. 4 is a cross-sectional view for explaining how light travels in light-emitting device 200A according to a comparative example. Note that the cross-section of light-emitting device 200A shown in FIG. 4 is a cross-section at a position corresponding to the cross-section of light-emitting device 200 shown in FIG. 3. Also, in FIG. 4, the light emitted from light source 220 is indicated by dashed arrows. The emission direction of light from light source 220 shown in FIG. 3 is the same as the emission direction of light from light source 220 shown in FIG. 4.
　発光装置２００Ａは、発光装置２００が備えるレンズ２３０とは異なる形状のレンズ２３０Ａを備える。 The light emitting device 200A includes a lens 230A having a different shape from the lens 230 included in the light emitting device 200.
　レンズ２３０Ａは、レンズ２３０とは異なり凹部２３７を備えない。レンズ２３０Ａは、レンズ２３０Ａの光軸（本実施の形態では、光源２２０が出射する光の光軸）を軸とした回転体となっている。 Unlike lens 230, lens 230A does not have a recess 237. Lens 230A is a rotating body with the optical axis of lens 230A (in this embodiment, the optical axis of the light emitted by light source 220) as its axis.
　このようなレンズ２３０Ａと光源２２０とが用いられた発光装置２００Ａでは、例えば、図４に示すように、入射面２３１で入射されてさらに第１全反射面２３５で反射された光が、車体２０に向かう場合がある。 In a light emitting device 200A using such a lens 230A and a light source 220, for example, as shown in FIG. You may be heading to
　一方、発光装置２００では、図３に示すようにレンズ２３０に凹部２３７が設けられているため、図４に示す光の進み方とは異なり、入射面２３１（より具体的には、凹部２３７）に入射された光は、第２全反射面２３６に向かう。さらに、第２全反射面２３６で反射された光は、車体２０とは反対側に向けてレンズ２３０から出射される。 On the other hand, in the light emitting device 200, since the lens 230 is provided with the recess 237 as shown in FIG. 3, unlike the way the light travels as shown in FIG. The light incident on the second total reflection surface 236 is directed toward the second total reflection surface 236. Further, the light reflected by the second total reflection surface 236 is emitted from the lens 230 toward the side opposite to the vehicle body 20.
　このように、例えば、第１減光部（本実施の形態では、凹部２３７）は、光源２２０から出射された光のうち、発光装置２００が第１減光部を備えない場合に第１全反射面２３５を通過する光の光路に設けられている。本実施の形態では、凹部２３７は、光源２２０から出射された光のうち、発光装置２００が第１減光部を備えない場合に第１全反射面２３５を通過する光の光路に設けられている。 In this way, for example, the first light attenuation section (in the present embodiment, the recessed section 237) reduces the first total of the light emitted from the light source 220 when the light emitting device 200 does not include the first light attenuation section. It is provided in the optical path of light passing through the reflective surface 235. In the present embodiment, the recess 237 is provided in the optical path of the light emitted from the light source 220 that passes through the first total reflection surface 235 when the light emitting device 200 does not include the first light attenuation section. There is.
　これにより、第１全反射面２３５のような全反射面を有するコリメータレンズのようなレンズであっても、当該レンズから出射される光が車両１０に向かうことが抑制される。 As a result, even if the lens is a collimator lens having a total reflection surface like the first total reflection surface 235, the light emitted from the lens is suppressed from going toward the vehicle 10.
　なお、凹部２３７のサイズ、溝深さおよび形状などは、光源２２０からの光が車体２０に向かわないように任意に設定されてよく、特に限定されない。 Note that the size, groove depth, shape, etc. of the recess 237 may be arbitrarily set so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
　なお、減光とは、例えば、減光部が設けられていない場合と比較して、拡散（散乱）、屈折、反射、および／または、吸収などにより光がレンズ２３０から出射されて車体２０に向かう光の単位面積当たりの光量（例えば、光エネルギー又は光束など）が低下することを意味する。本実施の形態では、凹部２３７によって、凹部２３７がない場合とは光が異なる方向に屈折されることで、レンズ２３０から出射されて車体２０に向かう光の単位面積当たりの光量が低下される。 Note that light attenuation means, for example, that light is emitted from the lens 230 and reaches the vehicle body 20 due to diffusion (scattering), refraction, reflection, and/or absorption, compared to a case where no light attenuation part is provided. This means that the amount of light (for example, light energy or luminous flux) per unit area of the directed light decreases. In this embodiment, the light is refracted by the recess 237 in a different direction than when the recess 237 is not present, thereby reducing the amount of light per unit area of the light emitted from the lens 230 and directed toward the vehicle body 20.
　［変形例］
　続いて、発光装置の変形例について図５および図６を参照して説明する。なお、以下で説明する発光装置の変形例については、上記の発光装置との差異点を中心に説明し、上記の発光装置と同様の構成については説明を省略または簡略化する場合がある。また、図５および図６に示す発光装置の断面は、図３に示す発光装置２００の断面に対応する位置の断面である。また、図５および図６では、光源から出射される光を破線矢印で示している。また、図３に示す光源２２０からの光の出射方向と、図５および図６に示す光源からの光の出射方向とは、同じである。 [Modified example]
Next, a modification of the light emitting device will be described with reference to FIGS. 5 and 6. Note that the modified examples of the light-emitting device described below will be explained focusing on the differences from the above-described light-emitting device, and the description of structures similar to the above-described light-emitting device may be omitted or simplified. Further, the cross section of the light emitting device shown in FIGS. 5 and 6 is a cross section at a position corresponding to the cross section of the light emitting device 200 shown in FIG. 3. Furthermore, in FIGS. 5 and 6, the light emitted from the light source is indicated by a broken line arrow. Further, the direction in which light is emitted from the light source 220 shown in FIG. 3 is the same as the direction in which light is emitted from the light source shown in FIGS. 5 and 6.
　＜変形例１＞
　図５は、変形例１に係る発光装置２００Ｂの構成を示す断面図である。 <Modification 1>
FIG. 5 is a cross-sectional view showing the configuration of a light emitting device 200B according to Modification 1.
　発光装置２００Ｂは、発光装置２００が備えるレンズ２３０とは異なる形状のレンズ２３０Ｂを備える。 The light emitting device 200B includes a lens 230B having a different shape from the lens 230 included in the light emitting device 200.
　レンズ２３０Ｂは、凹部２３８を備える。本変形例では、発光装置２００Ｂは、第１減光部として凹部２３８を備える。凹部２３８は、レンズ２３０Ｂから出射される光のうち、車体２０に向けて出射される光の少なくとも一部を減ずる。 The lens 230B includes a recess 238. In this modification, the light emitting device 200B includes a recess 238 as a first dimming section. The recess 238 reduces at least a portion of the light emitted toward the vehicle body 20 out of the light emitted from the lens 230B.
　凹部２３８は、第１全反射面２３５に設けられている凹部である。例えば、凹部２３８は、光源２２０から見て（言い換えると、光軸から見て）第１全反射面２３５における車体２０とは反対側に設けられている。凹部２３８が設けられることによって、レンズ２３０Ｂは、非回転体となっている。 The recess 238 is a recess provided in the first total reflection surface 235. For example, the recessed portion 238 is provided on the opposite side of the first total reflection surface 235 from the vehicle body 20 when viewed from the light source 220 (in other words, when viewed from the optical axis). By providing the recess 238, the lens 230B becomes a non-rotating body.
　なお、凹部２３８のサイズ、溝深さおよび形状などは、光源２２０からの光が車体２０に向かわないように任意に設定されてよく、特に限定されない。 The size, groove depth, and shape of the recess 238 may be set arbitrarily so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
　＜変形例２＞
　図６は、変形例２に係る発光装置の構成を示す断面図である。 <Modification 2>
FIG. 6 is a sectional view showing the configuration of a light emitting device according to Modification Example 2.
　発光装置２００Ｃは、発光装置２００Ａが備えるレンズ２３０Ａと同じレンズを備える。また、発光装置２００Ｃは、発光装置２００が備える透光カバー２５０とは異なる形状の透光カバー２５０Ａを備える。 The light emitting device 200C includes the same lens as the lens 230A included in the light emitting device 200A. Further, the light emitting device 200C includes a light transmitting cover 250A having a shape different from the light transmitting cover 250 included in the light emitting device 200.
　透光カバー２５０Ａは、凹凸部２５１を備える。本変形例では、発光装置２００Ｃは、第１減光部として凹凸部２５１を備える。凹凸部２５１は、レンズ２３０Ａから出射された光のうち、車体２０に向けて出射される光の少なくとも一部を減ずる。 The light-transmitting cover 250A includes an uneven portion 251. In this modification, the light emitting device 200C includes an uneven portion 251 as a first light attenuation portion. The uneven portion 251 reduces at least a portion of the light emitted toward the vehicle body 20 out of the light emitted from the lens 230A.
　このように、減光部は、透光カバーに設けられていてもよい。 In this way, the light-reducing section may be provided on the light-transmitting cover.
　なお、減光部、つまり、凹凸部２５１は、透光カバー２５０Ａにおける任意の位置に設けられてよい。例えば、凹凸部２５１は、光源２２０から見て（言い換えると、光軸から見て）透光カバー２５０Ａにおける車体２０側に設けられている。また、例えば、凹凸部２５１は、透光カバー２５０Ａにおける、レンズ２３０Ａから出射された光が入射される第１面２５２と、当該光が透光カバー２５０Ａから出射される第２面２５３とのうち、第１面２５２に設けられる。 Note that the light reduction portion, that is, the uneven portion 251 may be provided at any position on the light-transmitting cover 250A. For example, the uneven portion 251 is provided on the vehicle body 20 side of the transparent cover 250A when viewed from the light source 220 (in other words, when viewed from the optical axis). Further, for example, the uneven portion 251 is formed between a first surface 252 of the transparent cover 250A, into which the light emitted from the lens 230A is incident, and a second surface 253, through which the light is emitted from the transparent cover 250A. , provided on the first surface 252.
　また、凹凸部２５１は、本変形例では、２つの凸部と当該２つの凸部の間に位置する凹部とにより実現されている。凹凸部２５１が備える凸部および凹部の数は、任意でよい。例えば、凹凸部は、１つの凸部のみから実現されてもよいし、１つの凹部のみから実現されてもよい。 Further, in this modification, the uneven portion 251 is realized by two convex portions and a concave portion located between the two convex portions. The number of convex portions and concave portions included in the concavo-convex portion 251 may be arbitrary. For example, the uneven portion may be realized by only one convex portion or only one concave portion.
　また、凹凸部２５１のサイズ、溝深さおよび形状などは、光源２２０からの光が車体２０に向かわないように任意に設定されてよく、特に限定されない。 Further, the size, groove depth, shape, etc. of the uneven portion 251 may be arbitrarily set so that the light from the light source 220 is not directed toward the vehicle body 20, and are not particularly limited.
　また、本発明に係る発光装置は、上記のレンズおよび上記の透光カバーを任意に組み合わせて備えてもよい。例えば、発光装置は、レンズ２３０またはレンズ２３０Ｂと、透光カバー２５０Ａとを備えてもよい。また、レンズは、凹部２３７および２３８を備えてもよい。このように、例えば、レンズは、凹部２３７および／または２３８などの第１減光部を備え、透光カバーは、レンズから出射された光のうち、車体２０側に向けて出射される光の少なくとも一部を減ずる凹凸部２５１などの第２減光部を備えてもよい。つまり、凹凸部２５１は、第１減光部または第２減光部の一例であってもよい。第２減光部、つまり、凹凸部２５１は、例えば、透光カバー２５０Ａにおける、レンズ２３０または２３０Ｂから出射された光が入射される第１面２５２と、当該光が透光カバー２５０Ａから出射される第２面２５３とのうち、第１面２５２に設けられる。 Furthermore, the light emitting device according to the present invention may be provided with any combination of the above lens and the above transparent cover. For example, the light emitting device may include lens 230 or lens 230B and light-transmitting cover 250A. The lens may also include recesses 237 and 238. In this way, for example, the lens includes a first light attenuating portion such as the recess 237 and/or 238, and the light-transmitting cover reduces the light emitted toward the vehicle body 20 out of the light emitted from the lens. A second light attenuating portion such as an uneven portion 251 that reduces at least a portion of the light may be provided. That is, the uneven portion 251 may be an example of a first light reduction portion or a second light reduction portion. The second light attenuating portion, that is, the uneven portion 251 includes, for example, a first surface 252 of the light-transmitting cover 250A on which the light emitted from the lens 230 or 230B enters, and a first surface 252 on which the light emitted from the light-transmitting cover 250A enters. It is provided on the first surface 252 of the second surface 253.
　例えば、第２減光部（本変形例では、凹凸部２５１）は、光源２２０から出射された光のうち、発光装置２００が第２減光部を備えない場合に第１全反射面２３５を通過する光の光路に設けられている。本変形例では凹凸部２５１は、光源２２０から出射された光のうち、発光装置２００が第２減光部を備えない場合に第１全反射面２３５を通過する光の光路に設けられている。 For example, the second light attenuation section (in this modified example, uneven section 251) is provided in the optical path of the light emitted from light source 220, which passes through first total reflection surface 235 when light-emitting device 200 does not have a second light attenuation section. In this modified example, uneven section 251 is provided in the optical path of the light emitted from light source 220, which passes through first total reflection surface 235 when light-emitting device 200 does not have a second light attenuation section.
　［効果など］
　以下、本明細書の開示内容から得られる発明を例示し、例示される発明から得られる効果などについて説明する。 [Effects etc.]
Hereinafter, inventions obtained from the disclosure of this specification will be illustrated, and effects obtained from the exemplified inventions will be explained.
　発明１は、発光装置が出射した光を検出する撮像装置３００と並んで支持体に支持される当該発光装置であって、光源２２０と、（ｉ）光源２２０が出射した光が入射される入射面２３１を有し、光源２２０から離れるにつれて広がる椀状部２３３と、（ｉｉ）入射面２３１に入射された光が出射される出射面２３２を有し、光源２２０から離れる方向に突出した凸部２３４と、有するレンズと、を備え、凸部２３４は、出射面２３２の少なくとも一部の面であって、入射面２３１に入射された光を全反射する第１全反射面２３５を有し、椀状部２３３は、光源２２０から出射された光の光軸と交差する方向に位置する面であって、入射面２３１に入射された光を全反射する第２全反射面２３６を有し、発光装置は、レンズに入射される光のうち、光源２２０が出射した光の光軸と交差する方向に位置する支持体に向けて出射される光の少なくとも一部を減ずる第１減光部を備える、発光装置である。 Invention 1 is a light-emitting device supported on a support alongside an imaging device 300 that detects light emitted by the light-emitting device, the light-emitting device comprising: a light source 220; (i) a lens having an entrance surface 231 into which light emitted by the light source 220 is incident and a bowl-shaped portion 233 that widens as it moves away from the light source 220; and (ii) an exit surface 232 from which light incident on the entrance surface 231 is emitted and a convex portion 234 that protrudes in a direction away from the light source 220, the convex portion 234 being convex on at least one side of the exit surface 232. The bowl-shaped portion 233 has a first total reflection surface 235 that totally reflects the light incident on the entrance surface 231, and the bowl-shaped portion 233 has a second total reflection surface 236 that totally reflects the light incident on the entrance surface 231, and the light-emitting device is equipped with a first light-reducing portion that reduces at least a portion of the light that is emitted toward the support body that is located in a direction that intersects with the optical axis of the light emitted by the light source 220, out of the light that is incident on the lens.
　発光装置は、例えば、発光装置２００、２００Ｂ、または、２００Ｃである。レンズは、例えば、２３０、２３０Ｂ、または、２３０Ｃである。支持体は、例えば、車両１０である。より具体的には、発光装置２００は、第１支持体の一例である車両１０が備える車体２０が支持する第２支持体の一例であるドアミラー３０によって、第１支持体の側方に撮像装置３００と並んで支持（配置）されている。具体的には、第１減光部は、第１支持体（例えば、車体２０）に向かう光の少なくとも一部を減ずる。第１減光部は、例えば、凹部２３７、２３８、または、凹凸部２５１である。 The light emitting device is, for example, the light emitting device 200, 200B, or 200C. The lens is, for example, 230, 230B, or 230C. The support body is, for example, a vehicle 10. More specifically, the light emitting device 200 is mounted on the side of the first support by a door mirror 30, which is an example of a second support supported by a vehicle body 20 included in the vehicle 10, which is an example of a first support. It is supported (arranged) alongside 300. Specifically, the first light reduction section reduces at least a portion of the light directed toward the first support (for example, the vehicle body 20). The first light reduction portion is, for example, the recesses 237 and 238 or the uneven portion 251.
　本願発明者らは、鋭意検討した結果、発光装置から出射された光のうち支持部で一度反射された光が撮像装置３００に入射された場合、当該光の影響でハレーションが発生することを見出した。そのため、発明１に係る発光装置によれば、第１全反射面２３５および第２全反射面２３６を備えるようなレンズが用いられた発光装置であっても、撮像装置３００が生成する画像におけるハレーションの発生を抑制できる。 As a result of extensive studies, the inventors of the present application found that when light emitted from a light emitting device that has been reflected once on the support portion enters the imaging device 300, halation occurs due to the influence of the light. Ta. Therefore, according to the light emitting device according to Invention 1, even if the light emitting device uses a lens including the first total reflection surface 235 and the second total reflection surface 236, halation in the image generated by the imaging device 300 will not occur. The occurrence of can be suppressed.
　なお、支持体は、電信柱などであってもよい。例えば、第１支持体は、第２支持体を第１支持体の側方で支持する電信柱などの柱状部材であり、第２支持体は、光源ユニットを支持する支持体であって、電信柱に取り付けられている街路灯（照明器具）であってもよい。 Note that the support may be a telephone pole or the like. For example, the first support is a columnar member such as a telephone pole that supports the second support on the side of the first support, and the second support is a support that supports the light source unit, and the second support is a support for a telephone pole. It may also be a street light (lighting fixture) attached to a pole.
　発明２は、第１減光部は、光源２２０から出射された光のうち、発光装置が第１減光部を備えない場合に第１全反射面２３５を通過する光の光路に設けられている、発明１に記載の発光装置である。 In a second aspect of the invention, the first light attenuation section is provided in the optical path of light that passes through the first total reflection surface 235 when the light emitting device does not include the first light attenuation section among the light emitted from the light source 220. It is the light emitting device according to invention 1.
　これによれば、光源２２０からの光の一部を反射して車両１０に向かわせる第１全反射面２３５を備えるようなレンズが用いられた発光装置から出射された光を検出する撮像装置３００において特に効果的にハレーションの発生が抑制される。 According to this, an imaging device 300 detects light emitted from a light emitting device using a lens including a first total reflection surface 235 that reflects a part of light from a light source 220 and directs it toward the vehicle 10. The occurrence of halation is particularly effectively suppressed.
　発明３は、第１減光部は、入射面２３１に設けられている、発明１または２に記載の発光装置である。 Invention 3 is the light emitting device according to Invention 1 or 2, wherein the first light attenuation section is provided on the entrance surface 231.
　発明３に係る発光装置は、例えば、発光装置２００である。 The light emitting device according to the third invention is, for example, the light emitting device 200.
　これによれば、レンズに入射される際の光が減光されるため、例えばレンズから出射された光を減光するような場合と比較して、第１減光部によって光をより確実に制御しやすくできる。 According to this, the light when it enters the lens is attenuated, so the first light attenuation section can more reliably reduce the light, compared to, for example, the case where the light emitted from the lens is attenuated. It can be easily controlled.
　発明４は、第１減光部は、入射面２３１に設けられた凹部２３７である、発明３に記載の発光装置である。 A fourth invention is the light emitting device according to the third invention, wherein the first light attenuation portion is a recess 237 provided in the entrance surface 231.
　これによれば、簡単に第１減光部を形成できる。 According to this, the first light attenuation part can be easily formed.
　なお、第１減光部は、シボ加工、蒸着、２色成形、インサート成形、又は、レーザ照射により形成された構造であってもよい。これらの構造によって、支持体に向かう光が減光されてもよい。 Note that the first light-reducing portion may have a structure formed by texturing, vapor deposition, two-color molding, insert molding, or laser irradiation. These structures may attenuate the light directed towards the support.
　発明５は、第１減光部は、第１全反射面２３５に設けられている、発明１または２に記載の発光装置である。 Invention 5 is the light emitting device according to Invention 1 or 2, wherein the first light attenuation portion is provided on the first total reflection surface 235.
　発明５に係る発光装置は、例えば、発光装置２００Ｂである。 The light emitting device according to the fifth aspect of the invention is, for example, light emitting device 200B.
　これによれば、第１減光部が第１全反射面２３５以外の箇所に形成された場合にと比較して、第１減光部が第１全反射面２３５に直接設けられているため、第１減光部に入射される光をより確実に制御しやすくできる。 As a result, compared to when the first light-attenuating section is formed at a location other than the first total reflection surface 235, the first light-attenuating section is provided directly on the first total reflection surface 235, making it easier to more reliably control the light that is incident on the first light-attenuating section.
　発明６は、第１減光部は、第１全反射面２３５に設けられた凹部２３８である、発明５記載の発光装置である。 A sixth invention is the light emitting device according to the fifth invention, wherein the first light attenuation portion is a recess 238 provided in the first total reflection surface 235.
　これによれば、シボ加工などと比較して簡単にレンズに第１減光部を形成できる。 According to this, the first light attenuation portion can be formed on the lens more easily than with texturing or the like.
　発明７は、さらに、レンズから出射された光が透過される透光カバーを備える、発明１または２に記載の発光装置である。 Invention 7 is the light emitting device according to Invention 1 or 2, further comprising a transparent cover through which light emitted from the lens is transmitted.
　発明７に係る発光装置は、例えば、発光装置２００Ｃであり、発明７に係る透光カバーは、例えば、透光カバー２５０、または、２５０Ａである。 The light emitting device according to the seventh invention is, for example, the light emitting device 200C, and the transparent cover according to the seventh invention is, for example, the transparent cover 250 or 250A.
　これによれば、透光カバーによってレンズを外部からの飛散物などから保護できる。 According to this, the lens can be protected from flying objects from the outside by the light-transmitting cover.
　発明８は、透光カバーは、第１減光部を備え、第１減光部は、レンズから出射された光のうち、支持体に向けて出射される光の少なくとも一部を減ずる、発明７に記載の発光装置である。 Invention 8 is the light-emitting device described in invention 7, in which the translucent cover includes a first light-reducing section that reduces at least a portion of the light emitted from the lens toward the support.
　発明８に係る透光カバーは、透光カバー２５０Ａであり、発明８に係る第１減光部は、凹凸部２５１である。なお、この場合、発光装置が備えるレンズは、レンズ２３０Ａであってもよい。 The light-transmitting cover according to the eighth aspect of the invention is light-transmitting cover 250A, and the first light-reducing portion according to the eighth aspect of the invention is uneven portion 251. In this case, the lens provided in the light-emitting device may be lens 230A.
　これによれば、例えばレンズを、当該レンズの光軸を軸とした回転体として作成しても、透光カバーによって支持体に向かう光を減光できる。そのため、簡単にレンズを作成できかつ支持体に向かう光を減光できる。 According to this, even if the lens is made as a rotating body around the optical axis of the lens, for example, the light directed toward the support can be attenuated by the light-transmitting cover. Therefore, the lens can be easily created and the light directed toward the support can be reduced.
　発明９は、第１減光部は、透光カバーにおける、レンズから出射された光が入射される第１面２５２と、当該光が透光カバーから出射される第２面２５３とのうち、第１面２５２に設けられる、発明８に記載の発光装置である。 Invention 9 is the light-emitting device according to invention 8, in which the first light-reducing section is provided on the first surface 252 of the translucent cover, where the light emitted from the lens is incident, and the second surface 253 where the light is emitted from the translucent cover.
　これによれば、外部からの飛散物などによって第１減光部が傷つくことを抑制できる。 According to this, it is possible to suppress damage to the first dimming section caused by objects flying from the outside.
　発明１０は、レンズは、第１減光部を備え、透光カバーは、レンズから出射された光のうち、支持体に向けて出射される光の少なくとも一部を減ずる第２減光部を備える、発明７に記載の発光装置である。 In a tenth aspect of the invention, the lens includes a first light attenuation section, and the light-transmitting cover includes a second light attenuation section that reduces at least part of the light emitted toward the support body among the light emitted from the lens. It is a light emitting device according to invention 7, comprising:
　発明１０に係るレンズは、レンズ２３０またはレンズ２３０Ｂであり、発明１０に係る第１減光部は、凹部２３７または２３８であり、発明１０に係る第２減光部は、凹凸部２５１である。このように、本発明に係る発光装置の各構成要素は、任意に組み合わされて実現されてもよい。 The lens according to the tenth invention is the lens 230 or the lens 230B, the first light reduction part according to the tenth invention is the concave part 237 or 238, and the second light reduction part according to the tenth invention is the uneven part 251. In this way, each component of the light emitting device according to the present invention may be realized by arbitrary combinations.
　これによれば、複数個所に減光部が設けられるため、支持体に向かう光をより確実に減光できる。 According to this, since the light attenuation portions are provided at a plurality of locations, the light directed toward the support can be more reliably attenuated.
　発明１１は、第２減光部は、透光カバーにおける、レンズから出射された光が入射される第１面２５２と、当該光が透光カバーから出射される第２面２５３とのうち、第１面２５２に設けられる、発明１０に記載の発光装置である。 In invention 11, the second light attenuating portion includes a first surface 252 of the light-transmitting cover into which the light emitted from the lens is incident, and a second surface 253 through which the light is emitted from the light-transmitting cover. The light emitting device according to invention 10 is provided on the first surface 252.
　これによれば、外力などによって第１減光部が傷つくことを抑制できる。 According to this, it is possible to suppress the first dimming part from being damaged by external force or the like.
　発明１２は、発明１～１１のいずれか１つに記載の発光装置と、撮像装置３００と、を備える、光源ユニットである。 Invention 12 is a light source unit comprising the light emitting device according to any one of Inventions 1 to 11 and an imaging device 300.
　光源ユニットは、例えば、発光装置２００と撮像装置３００とを備える光源ユニット１００であるが、例えば、発光装置２００Ｂと撮像装置３００とを備える光源ユニットであってもよいし、発光装置２００Ｃと撮像装置３００とを備える光源ユニットであってもよく、本発明に係る発光装置が用いられて実現されればよい。 The light source unit is, for example, the light source unit 100 that includes a light emitting device 200 and an imaging device 300, but may also be a light source unit that includes a light emitting device 200B and an imaging device 300, or a light source unit that includes a light emitting device 200C and an imaging device. 300, and may be realized using the light emitting device according to the present invention.
　これによれば、上記の発光装置と同様の効果を奏する。 According to this, the same effects as the above-mentioned light emitting device are achieved.
　発明１３は、発明１２に記載の光源ユニットを備え、支持体である、車両である。 Invention 13 is a vehicle comprising the light source unit according to Invention 12 and serving as a support.
　車両は、例えば、光源ユニット１００を備える車両１０である。 The vehicle is, for example, a vehicle 10 that includes a light source unit 100.
　なお、車両は、発光装置２００Ｂと撮像装置３００とを有する光源ユニットを備える車両であってもよいし、発光装置２００Ｃと撮像装置３００とを有する光源ユニットを備える車両であってもよく、本発明に係る発光装置と撮像装置３００とを有する光源ユニットを備える車両であればよい。 Note that the vehicle may be a vehicle that includes a light source unit that includes the light emitting device 200B and the imaging device 300, or may include a light source unit that includes the light emitting device 200C and the imaging device 300. Any vehicle may be used as long as it includes a light source unit having the light emitting device and the imaging device 300 according to the above.
　これによれば、上記の発光装置と同様の効果を奏する。 According to this, the same effects as the above-mentioned light emitting device are achieved.
　発明１４は、上記の発光装置と同様の効果が発揮されるように発光装置と撮像装置３００とを簡単に車両に配置できる。 Invention 14 allows the light emitting device and the imaging device 300 to be easily placed in the vehicle so that the same effects as the above light emitting device are exhibited.
　（その他の実施の形態）
　以上、実施の形態におよび変形例に係る発光装置などについて説明したが、本発明は、上記実施の形態および変形例に限定されるものではない。 (Other embodiments)
Although the light emitting devices and the like according to the embodiments and modifications have been described above, the present invention is not limited to the above embodiments and modifications.
　例えば、光源が備える固体発光素子としてＬＥＤを例示したが、半導体レーザなどの半導体発光素子、または、有機ＥＬ（Ｅｌｅｃｔｒｏ　Ｌｕｍｉｎｅｓｃｅｎｃｅ）素子もしくは無機ＥＬ素子などの固体発光素子が採用されてもよい。 For example, although an LED is exemplified as a solid-state light-emitting element included in the light source, a semiconductor light-emitting element such as a semiconductor laser, or a solid-state light-emitting element such as an organic EL (Electro Luminescence) element or an inorganic EL element may be employed.
　また、例えば、光源は、ＳＭＤ（Ｓｕｒｆａｃｅ　Ｍｏｕｎｔ　Ｄｅｖｉｃｅ）構造のＬＥＤモジュールとして実現されてもよいし、基板にＬＥＤチップが直接実装された、いわゆるＣＯＢ（Ｃｈｉｐ　Ｏｎ　Ｂｏａｒｄ）構造のＬＥＤモジュールでもよい。 Further, for example, the light source may be realized as an LED module with an SMD (Surface Mount Device) structure, or may be an LED module with a so-called COB (Chip On Board) structure in which an LED chip is directly mounted on a substrate.
　また、レンズの厚みは、特に限定されないが、例えば、最薄の部分で０．５ｍｍ以上あればよい。これにより、レンズの成形性が向上される。 Further, the thickness of the lens is not particularly limited, but may be, for example, 0.5 mm or more at the thinnest part. This improves the moldability of the lens.
　また、減光部（第１減光部および／または第２減光部）は、凹部および／または凹凸部などではなく、例えば、シボ加工、蒸着、２色成形、インサート成形、または、レーザ照射により形成される構造などであってもよい。 In addition, the light attenuation part (the first light attenuation part and/or the second light attenuation part) is not a concave part and/or an uneven part, but is formed by, for example, texturing, vapor deposition, two-color molding, insert molding, or laser irradiation. It may also be a structure formed by.
　例えば、レンズおよび／または透光カバーにシボ加工が施されることにより、レンズおよび／または透光カバーの表面に凹凸が形成されることで、減光部が形成されてもよい。これにより、減光部は、光を拡散（散乱）することで減光する。 For example, the light-reducing portion may be formed by applying texture to the lens and/or the light-transmitting cover, thereby forming irregularities on the surface of the lens and/or the light-transmitting cover. Thereby, the light attenuation section reduces light by diffusing (scattering) the light.
　また、例えば、レンズおよび／または透光カバーに蒸着が施されることにより、レンズおよび／または透光カバーの表面に金属膜などの薄膜が減光部として形成されることで、減光部が形成されてもよい。これにより、減光部は、光を吸収または反射することで減光する。 Furthermore, for example, by applying vapor deposition to the lens and/or the light-transmitting cover, a thin film such as a metal film is formed as a light-reducing portion on the surface of the lens and/or the light-transmitting cover. may be formed. Thereby, the light attenuation section reduces light by absorbing or reflecting light.
　また、例えば、レンズおよび／または透光カバーに２色成形が施されることにより、レンズおよび／または透光カバーの表面および／または内部に光を吸収、反射、または、拡散する部分が形成されることで、減光部が形成されてもよい。これにより、減光部は、光を吸収、反射、または、拡散することで減光する。 Furthermore, for example, by performing two-color molding on the lens and/or the transparent cover, a portion that absorbs, reflects, or diffuses light is formed on the surface and/or inside of the lens and/or the transparent cover. By doing so, a light attenuation portion may be formed. Thereby, the light attenuation section reduces light by absorbing, reflecting, or diffusing light.
　また、例えば、レンズおよび／または透光カバーにレーザ照射が施されることにより、レンズおよび／または透光カバーの表面および／または内部が着色されて光を吸収する部分が形成されることで、減光部が形成されてもよい。これにより、減光部は、光を吸収することで減光する。あるいは、例えば、レンズおよび／または透光カバーにレーザ照射が施されることにより、レンズおよび／または透光カバーの表面が粗化されることで、減光部が形成されてもよい。これにより、減光部は、光を散乱することにより減光する。 Further, for example, by applying laser irradiation to the lens and/or the transparent cover, the surface and/or inside of the lens and/or the transparent cover may be colored to form a portion that absorbs light. A light reduction portion may be formed. Thereby, the light attenuation section reduces light by absorbing light. Alternatively, the light-attenuating portion may be formed by, for example, irradiating the lens and/or the light-transmitting cover with a laser to roughen the surface of the lens and/or the light-transmitting cover. Thereby, the light attenuation section reduces the light by scattering the light.
　また、減光部は、これらの構成が任意に組み合わせれて実現されてもよい。 Furthermore, the light attenuation section may be realized by any combination of these configurations.
　また、例えば、発光装置は、車両の周囲の路面に光を照射できればよく、ドアミラーに配置されていてもよいし、オーバーハング面などの車体の外面に配置されていてもよい。オーバーハング面は、例えば、車体の下方側の部分であって、鉛直方向に対して傾斜した面である。撮像装置の配置も発光装置と同様である。 Further, for example, the light emitting device only needs to be able to irradiate light onto the road surface around the vehicle, and may be placed on a door mirror or on the outer surface of the vehicle body, such as an overhang surface. The overhang surface is, for example, a lower portion of the vehicle body, and is a surface inclined with respect to the vertical direction. The arrangement of the imaging device is also similar to that of the light emitting device.
　また、光源ユニットは、１つの撮像装置を備えてもよいし、複数の撮像装置を備えてもよい。 Furthermore, the light source unit may include one imaging device or may include multiple imaging devices.
　また、例えば、発光装置および撮像装置を制御する制御装置が備える処理部の各構成要素は、専用の回路などのハードウェアで構成されてもよいし、各構成要素に適したソフトウェアプログラムを実行することによって実現されてもよい。各構成要素は、ＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）またはプロセッサなどのプログラム実行部が、ハードディスクまたは半導体メモリなどの非一時的な記録媒体に記録されたソフトウェアプログラムを読み出して実行することによって実現されてもよい。 Further, for example, each component of the processing unit included in the control device that controls the light emitting device and the imaging device may be configured with hardware such as a dedicated circuit, or may be configured with a software program suitable for each component. It may be realized by Each component may be realized by a program execution unit such as a CPU (Central Processing Unit) or a processor reading and executing a software program recorded on a non-transitory recording medium such as a hard disk or semiconductor memory. .
　その他、各実施の形態および変形例に対して当業者が思いつく各種変形を施して得られる形態、または、本発明の趣旨を逸脱しない範囲で各実施の形態および変形例における構成要素および機能を任意に組み合わせることで実現される形態も本発明に含まれる。 In addition, the present invention also includes forms obtained by applying various modifications to each embodiment and modification that a person skilled in the art would conceive, or forms realized by arbitrarily combining the components and functions of each embodiment and modification within the scope that does not deviate from the spirit of the present invention.
　１０　車両
　２０　車体
　３０　ドアミラー
　１００　光源ユニット
　２００、２００Ａ、２００Ｂ、２００Ｃ　発光装置
　２２０　光源
　２３０、２３０Ａ、２３０Ｂ　レンズ
　２３１　入射面
　２３２　出射面
　２３３　椀状部
　２３４　凸部
　２３５　第１全反射面
　２３６　第２全反射面
　２３７、２３８　凹部
　２５０、２５０Ａ　透光カバー
　２５１　凹凸部
　２５２　第１面
　２５３　第２面
　３００　撮像装置 10 Vehicle 20 Vehicle body 30 Door mirror 100 Light source unit 200, 200A, 200B, 200C Light emitting device 220 Light source 230, 230A, 230B Lens 231 Incident surface 232 Output surface 233 Bowl-shaped portion 234 Convex portion 235 First total reflection surface 236 Second total reflection Surfaces 237, 238 Recesses 250, 250A Transparent cover 251 Uneven portions 252 First surface 253 Second surface 300 Imaging device

Claims (14)

  1. 　発光装置が出射した光を検出する撮像装置と並んで支持体に支持される当該発光装置であって、
    　光源と、
    　（ｉ）前記光源が出射した光が入射される入射面を有し、前記光源から離れるにつれて広がる椀状部と、（ｉｉ）前記入射面に入射された光が出射される出射面を有し、前記光源から離れる方向に突出した凸部と、を有するレンズと、を備え、
    　前記凸部は、前記出射面の少なくとも一部の面であって、前記入射面に入射された光を全反射する第１全反射面を有し、
    　前記椀状部は、前記光源から出射された光の光軸と交差する方向に位置する面であって、前記入射面に入射された光を全反射する第２全反射面を有し、
    　前記発光装置は、前記レンズに入射される光のうち、前記光源が出射した光の光軸と交差する方向に位置する前記支持体に向けて出射される光の少なくとも一部を減ずる第１減光部を備える、
    　発光装置。     A light emitting device supported by a support body alongside an imaging device that detects light emitted by the light emitting device,
    a light source and
    (i) It has an entrance surface into which the light emitted from the light source is incident, and a bowl-shaped part that widens as it moves away from the light source, and (ii) It has an exit surface through which the light that was incident on the entrance surface is exited. , a lens having a convex portion protruding in a direction away from the light source,
    The convex portion has a first total reflection surface that is at least a part of the output surface and totally reflects the light incident on the input surface,
    The bowl-shaped portion has a second total reflection surface that is located in a direction intersecting the optical axis of the light emitted from the light source and totally reflects the light incident on the incidence surface,
    The light emitting device includes a first attenuator that reduces at least a portion of the light that is incident on the lens and is emitted toward the support body located in a direction intersecting the optical axis of the light emitted from the light source. Equipped with a light section,
    Light emitting device.
  2. 　前記第１減光部は、前記光源から出射された光のうち、前記発光装置が前記第１減光部を備えない場合に前記第１全反射面を通過する光の光路に設けられている、
    　請求項１に記載の発光装置。     The first light attenuation section is provided in the optical path of light that passes through the first total reflection surface when the light emitting device does not include the first light attenuation section, among the light emitted from the light source. ,
    The light emitting device according to claim 1.
  3. 　前記第１減光部は、前記入射面に設けられている、
    　請求項１に記載の発光装置。     The first light attenuation section is provided on the incident surface,
    The light emitting device according to claim 1.
  4. 　前記第１減光部は、前記入射面に設けられた凹部である、
    　請求項３に記載の発光装置。     The first light attenuation portion is a recess provided in the incident surface.
    The light emitting device according to claim 3.
  5. 　前記第１減光部は、前記第１全反射面に設けられている、
    　請求項１に記載の発光装置。     The first light attenuation section is provided on the first total reflection surface,
    The light emitting device according to claim 1.
  6. 　前記第１減光部は、前記第１全反射面に設けられた凹部である、
    　請求項５に記載の発光装置。     The first light attenuation portion is a recess provided in the first total reflection surface,
    The light emitting device according to claim 5.
  7. 　さらに、前記レンズから出射された光が透過される透光カバーを備える、
    　請求項１に記載の発光装置。     Further, a light-transmitting cover is provided through which the light emitted from the lens passes.
    The light emitting device according to claim 1 .
  8. 　前記透光カバーは、前記第１減光部を備え、
    　前記第１減光部は、前記レンズから出射された光のうち、前記支持体に向けて出射される光の少なくとも一部を減ずる、
    　請求項７に記載の発光装置。     The light-transmitting cover includes the first light reduction section,
    The first light reduction section reduces at least a portion of the light emitted toward the support, out of the light emitted from the lens.
    The light emitting device according to claim 7.
  9. 　前記第１減光部は、前記透光カバーにおける、前記レンズから出射された光が入射される第１面と、当該光が前記透光カバーから出射される第２面とのうち、前記第１面に設けられる、
    　請求項８に記載の発光装置。     The first light attenuating portion is configured to reduce the light output from the first surface of the light-transmitting cover through which the light emitted from the lens enters, and the second surface through which the light exits from the light-transmitting cover. Provided on one side,
    The light emitting device according to claim 8.
  10. 　前記レンズは、前記第１減光部を備え、
    　前記透光カバーは、前記レンズから出射された光のうち、前記支持体に向けて出射される光の少なくとも一部を減ずる第２減光部を備える、
    　請求項７に記載の発光装置。     The lens includes the first light-attenuating portion,
    The light-transmitting cover includes a second light-reducing unit that reduces at least a portion of the light emitted from the lens toward the support body.
    The light emitting device according to claim 7.
  11. 　前記第２減光部は、前記透光カバーにおける、前記レンズから出射された光が入射される第１面と、当該光が前記透光カバーから出射される第２面とのうち、前記第１面に設けられる、
    　請求項１０に記載の発光装置。     The second light attenuating portion is configured to reduce the light output from the first surface of the light-transmitting cover through which the light emitted from the lens enters, and the second surface through which the light exits from the light-transmitting cover. Provided on one side,
    The light emitting device according to claim 10.
  12. 　請求項１～１１のいずれか１項に記載の発光装置と、
    　前記撮像装置と、を備える、
    　光源ユニット。     The light emitting device according to any one of claims 1 to 11,
    The imaging device,
    light source unit.
  13. 　請求項１２に記載の光源ユニットを備え、前記支持体である、
    　車両。     The light source unit according to claim 12 is provided, and the support is
    vehicle.
  14. 　前記光源ユニットが配置されるドアミラーを備える、
    　請求項１３に記載の車両。     comprising a door mirror in which the light source unit is arranged;
    Vehicle according to claim 13.
PCT/JP2023/032262 2022-09-22 2023-09-04 Light-emitting device, light source unit, and vehicle WO2024062910A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020019303A (en) * 2018-07-30 2020-02-06 パナソニックＩｐマネジメント株式会社 Light source unit and vehicle
JP2021017228A (en) * 2019-07-20 2021-02-15 株式会社小糸製作所 Vehicular lighting device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020019303A (en) * 2018-07-30 2020-02-06 パナソニックＩｐマネジメント株式会社 Light source unit and vehicle
JP2021017228A (en) * 2019-07-20 2021-02-15 株式会社小糸製作所 Vehicular lighting device

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