Lighting device

Abstract

Lighting device (100), comprising: a base (102) including a through hole (121) aligned with an optical path of laser light (L) for receiving and transmitting the laser light (L); a light emitter (101) which, when irradiated with the laser light (L) transmitted through the through hole (121), emits light by converting a wavelength of the laser light (L); an attachment component (103) provided on the base (102) for attaching the light emitter (101) to the base (102), the light emitter (101) being removable from the base (102); a blocking component (141) that blocks the optical path of the laser light (L); and a biasing component (142) which exerts a force on the locking component (141), wherein the optical path is opened by the blocking component (141) which is moved against the biasing component (142) when the blocking component (141) contacts the light emitter (101) attached to the mounting component (103), and the optical path is blocked by the blocking component (141) which is moved by the force of the biasing component (142) when the light emitter (101) is removed from the base (102).

Description

Technical FieldThe present invention relates to a lighting device using laser light as a light source.BackgroundAs is known, lighting devices are provided that include a light emitter including light-emitting phosphors, wherein an optical fiber serves to transmit laser light as excitation light to illuminate by converting the laser light into light of a desired color. Since the laser light used as excitation light has a high energy density, techniques for avoiding direct entry of the laser light into the human eye are required from the viewpoint of safety.For example, Patent Document 1 describes a technique in which a light distributing material containing minute particles of silicon oxide or titanium oxide dispersedly is placed with respect to the light emitter on the side opposite to the side irradiated with the laser light to reduce coherence of the laser light in the case where the light emitter breaks or falls down, and the like.JP 2012-074 620 A describes an illumination device including a light source that emits excitation light; a wavelength conversion member that is disposed adjacent to the light source in front of the light source and on the optical axis of the light source with respect to the emission direction of the excitation light, and in which the wavelength of the excitation light is converted by irradiation with the excitation light as desired to emit light having a peak wavelength different from that of the excitation light; and a density decreasing part that intervenes adjacent to the light source in front of the light source and on the optical axis of the light source when the wavelength conversion member deviates from the optical axis of the light source and decreases the density of the excitation light currently emitted from the light source. US 2011 / 0 293 220 A1 describes an optical coupling device including an optical fiber holder configured to hold an optical fiber, a wavelength conversion element including a phosphor and an optical characteristic matching element, and a wavelength conversion element holder configured to hold the wavelength conversion element. The optical coupling device includes a first region formed on an end surface of the optical fiber and an end surface of the wavelength conversion element which are optically coupled when the optical fiber holder and the wavelength conversion element holder are joined, and in which foreign matters shielding the laser beam are removed from an optical axis of the optical fiber and an optical axis of the wavelength conversion element, and a second region formed outside the first region when the optical fiber holder and the wavelength conversion element holder are joined, and in which the foreign matters removed from the first region flow.Citer ListPatent LiteraturePTL 1: Japanese Unexamined Patent Application Publication No. 2011-154 995SUMMARY OF THE INVENTIONTechnical ProblemAs in the technique shown in the aforementioned Laid-Open Patent Application PTL 1, techniques are known to be provided that prevent laser light from directly entering the eye.Meanwhile, lighting devices having an exchange function have recently been developed. The replacement function allows a light emitter already mounted on the lighting device to be removed and replaced with a new light emitter, for example, when a damaged light emitter is to be replaced with a new light emitter or when an existing light emitter is to be replaced with a light emitter emitting light of a different color. Moreover, during the development phase, a technique has been proposed which protects the eye from laser light even during a replacement operation of the light emitter.An object of the present invention is to provide a lighting device that includes laser light as a light source and can protect the eye from accidental leakage of laser light during replacement of the light emitter.Solution of the ProblemThe object is achieved by a lighting device having the features disclosed in claim 1. Further embodiments are defined in the dependent claims.Advantageous Effects of the InventionAccording to the lighting device according to an aspect of the present invention, the light blocking device securely blocks the optical path of the laser light when the light emitter is removed, thereby making it possible to prevent laser light from unintentionally entering the eye during replacement of the light emitter.Brief Description of the DrawingsFIG. 1 is a perspective view of the external appearance of a lighting device according to an embodiment. FIG. 2 is a perspective view of the vicinity of a light emitter according to the embodiment. FIG. 3 is a cross-sectional view of the lighting device according to the embodiment. FIG. 4 is a perspective view of the vicinity of the attachment components according to the embodiment. FIG. 5 is a plan view of a partial cross section of the vicinity of the attachment components according to the embodiment. FIG. 6 is a diagram for describing the phases of a replacement operation of a light emitter according to the embodiment. FIG. 7 is a diagram for describing the phases of a replacement operation of a light emitter according to Modification 1. FIG. 8 is a diagram for describing the phases of a replacement operation of a light emitter according to Modification 2. FIG. 9 is a diagram for describing the phases of a replacement operation of a light emitter according to Modification 3. FIG. 10 is a diagram for describing the phases of a replacement operation of a light emitter according to Modification 4.DESCRIPTION OF THE EMBODIMENTHereinafter, a lighting device according to an exemplary embodiment of the present invention will be described with reference to the drawings. Note that the exemplary embodiment described below shows a specific example. Therefore, the numerical values, shapes, materials, structural components, and the arrangement and connection of the structural components and the like as shown in the following embodiment are mere examples, and are not intended to limit the scope of the present invention. Moreover, among the structural components in the following exemplary embodiment, those components not recited in any of the independent claims indicating the most general concepts of the present invention are described as arbitrary structural components.Furthermore, the respective figures are schematic diagrams and not necessarily accurate representations. Moreover, identical structural components are denoted by the same reference numerals in the respective diagrams.An exemplary embodiment will be described below.Configuration of the Lighting DeviceFIG. 1 is a perspective view of the external appearance of a lighting device according to the present embodiment. FIG. 2 is a perspective view of the vicinity of a light emitter according to the present embodiment. FIG. 3 is a cross-sectional view of the lighting device according to the present embodiment.As illustrated in the above figures, the lighting device 100 is a device that emits visible light with laser light L as a light source, and includes a light emitter 101, a base 102, mounting components 103, and a light shutter 104. In the present embodiment, lighting device 100 further includes lens 105, housing 106, optical system 107, and fiber mounting component 108.As illustrated in FIG. 3, when the light emitter 101 is irradiated with laser light L, it may emit light of a wavelength different from the laser light L. In the present embodiment, the light emitter 101 includes a board 111 and a converter 112.The plate 111 is a structural component for holding the transducer 112, and is a transparent component capable of transmitting laser light L. Specifically, the plate 111 is, for example, a sapphire glass plate or the like. In the present embodiment, in the portion of the plate 111 where the converter 112 is not provided, a shield film or structure is provided so as not to transmit the laser light L.The converter 112 includes phosphor particles that generate fluorescence when excited by the laser light L, and irradiation with the laser light L causes the phosphors to generate fluorescence having a wavelength different from the laser light L.Specifically, the transducer 112 can be exemplified as a component in which phosphor particles are dispersed within a base material comprising a transparent resin or glass, or also as a component in which phosphor particles are densely packed. In other words, the converter 112 includes a wavelength conversion substance that converts the laser light into fluorescence.In the present embodiment, the converter 112 radiates white light as illumination light and includes, as a wavelength conversion substance, multiple types of phosphors that emit light of a different color upon irradiation with the laser light L.Although there is no particular limitation on the type or properties of the wavelength conversion substance, it is preferable that the phosphors have high heat resistance because laser light L having comparatively high power serves as excitation light.In addition, although there is no particular limitation on the type of the base material that maintains the wavelength conversion substance in the dispersed state, it is preferable that the material has high transparency because higher transparency improves the radiation efficiency of white light. Furthermore, the base material has high heat resistance, for example, because laser light L having comparatively high power is incident.Further, the converter 112 may include a function film for efficiently irradiating the phosphors with laser light L, a function film for efficiently irradiating emitted visible light, and the like.The base 102 is a socket-like structural component that holds the light emitter 101 at a predetermined position. In the present embodiment, the base 102 is a disk-shaped component, and a through hole 121 for transmitting laser light L is provided at the center. Further, the outer peripheral portion of the base 102 is fixed to the inner peripheral portion of the housing 106.FIG. 4 is a perspective view of the vicinity of the attachment components.FIG. 5 is a plan view of the vicinity of the attachment components.As illustrated in the above figures, the mounting components 103 are structural components provided in the base 102 and allow the light emitter 101 to be freely mounted on and removable from the base 102. In the present embodiment, the mounting components 103 are provided opposite to each other at a distance corresponding to the width of the plate 111 of the light emitter 101, each extending along the sliding direction (in the Z-axis direction in the figure) of the light emitter 101 and having an L-shaped cross section perpendicular to the extending direction, to form grooves enclosing the plate 111 of the light emitter 101 together with the base 102.The light blocking device 104 is a mechanism that opens the optical path of the laser light L when the light emitter 101 is mounted on the base 102, and blocks the optical path of the laser light L when the light emitter 101 is removed from the base 102.In the present embodiment, the light blocking member 104 includes a blocking member 141 that blocks the optical path of the laser light L and a biasing member 142 that applies a force to the blocking member 141.In the present embodiment, the blocking component 141 is a plate-shaped component that includes a material that does not transmit the laser light L and that has the same shape as the plate 111 of the light emitter 101 in a plan view (in the YZ plane in the figure). Further, the locking component 141 is attached to the attachment components 103 so as to be slidable with respect to the base 102 in the same manner as the light emitter 101.The biasing component 142 is a component that applies a force in the sliding displacement direction (in the Z-axis direction in the figure) to the locking component 141. The biasing component 142, although not particularly limited, may be exemplarily formed as a spring or rubber. In the present embodiment, a coil spring is used as the biasing component 142.As illustrated in FIGS. 1 and 3, the lens 105 is a component that is disposed on a side opposite to the side irradiated with the laser light L (the side on which the optical system 107 is disposed in the present embodiment) with respect to the light emitter 101, and has a light distribution control structure that controls the distribution of light irradiated by the light emitter 101. In the present embodiment, the lens 105 is attached to the housing 106.Although there is no particular limitation on the material of the lens 105 as long as light emitted from the light emitter 101 is transmitted, it is preferable that the material enables the formation of the light distribution control structure. A resin material such as acrylic or polycarbonate, or a glass material or the like can be given as an example of the material of the lens 105.As illustrated in FIG. 1 and FIG. 3, the housing 106 is a box-like structural component that houses the light emitter 101 and the optical system 107, and includes a lens 105 attached to one end and a fiber attachment component 108 attached to the other end.In the present embodiment, the housing 106 is a cylindrical component and covers the optical path of the laser light L, and a component or structure that absorbs the laser light L is provided on the inner peripheral surface of the housing 106 (omitted from illustration).Here, the component that absorbs laser light is, for example, a component including a pigment that absorbs blue color when the laser light is blue. Further, the structure that absorbs laser light is a structure and the like that causes irregular reflection and compression of the laser light by having fine irregularities on the inner peripheral surface. Accordingly, the safety of the lighting device 100 can be maintained at a high level even when the optical axis of the laser light L is unintentionally shifted.The optical system 107 is a set of lenses selected to collect incident laser light L at the light emitter 101.Note that the type of the optical system 107 is appropriately selected according to the intended use of the lighting device 100, and there are also cases where the lighting device 100 does not include the optical system 107.The fiber mounting component 108 is a component for mounting the optical fiber 200 to the housing 106 in a manner that the optical fiber 200 is aligned with a predetermined optical axis. The optical fiber 200 transmits the laser light emitted from a light source device which is a separate body from the lighting device 100. The fiber mounting component 108 allows the optical fiber 200 to be mounted such that the optical axis of the laser light L passes through the converter 112 of the light emitter 101.Replacement Operation of Light EmitterNext, the replacement operation of the light emitter 101 will be described.FIG. 6 is a diagram for describing the phases of a replacement operation of the light emitter.As shown in phase (a) in the figure, in a state where the light emitter 101 is attached to the attachment components 103 to cover the through hole 121 forming the optical path of the laser light L, the blocking component 141 is positioned at an opening position where the optical path (through hole 121) is opened. In the present embodiment, the plate 111 of the light emitter 101 and the locking component 141 have the same shape, and the locking component 141 is slidably disposed adjacent to the plate 111. Further, the blocking component 141 is urged from the light emitter 101 toward the through hole 121.Next, as shown in phase (b) in the figure, when the light emitter 101 is slide-shifted to exchange the light emitter 101, the blocking component 141 is slid by the biasing component 142 and slide-shifted together with the light emitter 101. As a result, while the light emitter 101 is being slide-shifted, the through hole 121, which is the optical path of the laser light L, is blocked by the light emitter 101 or the blocking component 141, and therefore the laser light L does not leak to the outside.Next, as shown in phase (c) in the figure, in a state where the light emitter 101 is removed from the mounting components 103, the blocking component 141 is further pushed outward from the biasing component 141 so as to be positioned at a blocking position where the blocking component 141 covers and blocks the through hole 121.Accordingly, in a process in which the light emitter 101 is to be removed from the mounting components 103, the light emitter 101 can be removed securely without opening the optical path of the laser light L.On the other hand, when the light emitter 101 is attached to the attachment components 103, sliding the light emitter 101 in the order of (c), (b), (a) which is the reverse of the above-mentioned order positions the light emitter 101 at a position where the laser light L is irradiated, and the blocking component 141 which is slid by the light emitter 101 is slid to a predetermined position while causing contraction of the biasing component 142. In this way, even when the light emitter 101 is mounted, the through hole 121, which is the optical path of the laser light L, is always blocked by the disk 111 or the blocking component 141.As described above, according to the configuration of the present embodiment, the light emitter 101 can be replaced without opening the through hole 121 that is the optical path of the laser light L, thereby making it possible to prevent the laser light L from unintentionally entering the eye during the replacement operation and the light emitter 101 from being replaced securely.Modification 1Next, a modification of the light barrier 104 of the lighting device 100 will be described. Note that the same reference numerals are assigned to the components (portions) having the same operation, function, shape, mechanism, or structure as in the above-described embodiment, and description thereof is omitted.FIG. 7 is a diagram for describing the phases of a replacement operation of a light emitter in Modification 1. note that phase (F) in FIG. 7 is a plan view of the periphery of the light emitter 101, while phases (a), (b), and (c) in FIG. 7 are cross-sectional views of the periphery of the light emitter 101 from the side.As illustrated in the figure, the light barrier 104 includes a barrier component 141 and a biasing component 142, and a transmission hole 143 having the same diameter as the through hole 121 provided in the base 102 is provided in the light barrier 104. Further, the blocking component 141 is disposed further on the laser light incident side (in the figure, the negative side in the X-axis direction) than the light emitter 101 and is slidably held by the base 102. In addition, the locking component 141 includes a lever 140 that extends from the central portion of the locking component 141 and protrudes beyond the surface of the base 102. The biasing component 142 applies a tension direction force to the locking component 141.Replacement Operation of Light EmitterNext, the replacement operation of the light emitter 101 will be described.As shown in phase (a) in FIG. 7, in a state where the light emitter 100 is attached to the attachment components 103 to cover the through hole 121 forming the optical path of the laser light L, the light emitter 101 is engaged with the lever 140 of the light shutter 104 and is held in a state where the transmission hole 143 of the shutter component 141 and the through hole 121 of the base 102 are aligned. Thereby, the blocking component 141 opens the optical path of the laser light L (through hole 121).Next, as shown in phase (b) in FIG. 7, when the light emitter 101 is slide-shifted to exchange the light emitter 101, the blocking component 141 is pulled by the biasing component 142 and slide-shifted together with the light emitter 101. As a result, while the light emitter 101 is being slide-shifted, the through hole 121, which is the optical path of the laser light L, is blocked by the blocking component 141, and therefore the laser light L does not leak to the outside.Next, as shown at (c) in FIG. 7, in a state where the light emitter 101 is not attached to the base 102, the biasing component 142 pulls the blocking component 141 such that the blocking component 141 covers and blocks the through hole 121 ( 141).Accordingly, in a process in which the light emitter 101 is to be removed from the mounting components 103, the light emitter 101 can be removed securely without opening the optical path of the laser light L. Moreover, in the case of Modification 2, since that portion of the plate 111 which is not mounted in the converter 112 of the light emitter 101 is covered with the blocking component 141, the laser light L is not radiated to the outside even when that portion of the plate 111 is transparent with respect to the laser light L, and thus safety can be ensured.However, when the light emitter 101 is attached to the attachment components 103, sliding displacement of the light emitter 101 in the order of (c), (b), and (a), which is the reverse of the above-described order, enables the light emitter 101 to be attached to the base 102. In a state where the light emitter 101 is mounted, the transmission hole 143 of the blocking component 141 is aligned with the through hole 121 that is the optical path of the laser light L, and thus the converter 112 of the light emitter 101 is irradiated with the laser light L.Accordingly, the light emitter 101 can be surely exchanged without opening the through hole 121 which is the optical path of the laser light L during the exchanging operation of the light emitter 101.Modification 2Next, another modification of the light barrier 104 of the lighting device 100 will be described. Note that the same reference numerals are assigned to the components (portions) having the same operation, function, shape, mechanism, or structure as the above-described embodiment and modification 1, and description thereof is omitted.FIG. 8 is a diagram for describing the phases of a replacement operation of the light emitter in Modification 2. note that phase (F) in FIG. 8 is a plan view of the vicinity of the light emitter 101, while phases (a) and (b) in FIG. 8 are cross-sectional views of the vicinity of the light emitter 101 from the side.As shown in the figure, the light barrier 104 includes a blocking component 141, a biasing component 142, and an engaging component 149. Further, the light blocking member 104 includes a through hole 143 having the same diameter as the through hole 121 provided in the base 102, and the blocking member 141 is rotatably attached to the base 102 through a hinge 144. The biasing component 142 applies a tension direction force to the locking component 141.Replacement Operation of Light EmitterNext, the replacement operation of the light emitter 101 will be described.As illustrated in phase (a) in FIG. 8, in a state where the light emitter 101 is attached to the attachment components 103 to cover the through hole 121 forming the optical path of the laser light L, the light emitter 101 and the engagement component 149 of the light shutter 104 are engaged, and the shutter component 141 rotates until being parallel to the surface of the base 102. Accordingly, the through hole 121 of the base 102 and the transmission hole 143 are aligned, whereby the optical path of the laser light L is placed in the open state.Next, as shown in phase (b) in FIG. 8, in a state where the light emitter 101 is removed from the mounting components 103 of the base 102, the locking component 141 is pulled by the biasing component 142 and rotates with respect to the base 102 so as to be positioned at a locking position in which the through hole 121 is covered.Accordingly, in a process in which the light emitter 101 is removed from the mounting components 103, the light emitter 101 can be securely removed without opening the optical path of the laser light L. Even when the light emitter 101 is attached to the attachment components 103 in the order (b) and then (a) which is the reverse of the above-mentioned order, the light emitter 101 can be securely attached without opening the through hole 121.Variation 3Next, another modification of the light barrier 104 of the lighting device 100 will be described. Note that the same reference numerals are assigned to those components (portions) having the same operation, function, shape, mechanism, or structure as the above-described embodiment and modifications 1 and 2, and description thereof will be omitted.FIG. 9 is a diagram for describing the phases of a replacement operation of the light emitter in Modification 3. Note that phase (F) in FIG. 9 is a plan view of the vicinity of the light emitter 101, while phases (a) and (b) in FIG. 9 are cross-sectional views of the vicinity of the light emitter 101 from the side.As illustrated in the figure, the light blocking device 104 includes the blocking component 141, a biasing component (not illustrated), and the engaging component 149. Further, the locking component 141 is rotatably attached to the base 102 through the hinge 144. The biasing component is a coil spring and exerts such a force that the locking component 141 becomes parallel to the surface of the base 102.Replacement Operation of Light EmitterNext, the replacement operation of the light emitter 101 will be described.As shown in phase (a) in FIG. 9, in a state where the light emitter 101 is attached to the attachment components 103 to cover the through hole 121 forming the optical path of the laser light L, the light emitter 101 and the engagement component 149 of the light shutter 104 are engaged, and the shutter component 141 rotates until the through hole 121 is opened and the shutter component 141 hangs down. Accordingly, the optical path of the laser light L is opened.Next, as illustrated in phase (b) in FIG. 9, in a state where the light emitter 101 is not attached to the attachment components 103 of the base 102, the locking component 141 rotates due to the biasing component 142, and is thus positioned at a locking position in which the through hole 121 is covered.Accordingly, in a process in which the light emitter 101 is removed from the mounting components 103, the light emitter 101 can be securely removed without opening the optical path of the laser light L. Even when the light emitter 101 is attached to the attachment components 103 in the order (b) and then (a) which is the reverse of the aforementioned order, the light emitter 101 can be securely attached without opening the through hole 121.Note that, in the present embodiment, the replacement operation of the light emitter 101 is performed not by sliding the light emitter 101 with respect to the surface of the base 102, but by moving the light emitter 101 along the axis of the through hole 121.Modification 4Next, another modification of the light barrier 104 of the lighting device 100 will be described. Note that the same reference numerals are assigned to components (portions) having the same operation, function, shape, mechanism, or structure as the above-described embodiment and modifications 1, 2, and 3, and description thereof will be omitted.FIG. 10 is a diagram for describing the phases of a replacement operation of the light emitter in Modification 4. note that phase (F) in FIG. 10 is a plan view of the vicinity of the light emitter 101, while phases (a) and (b) in FIG. 10 are cross-sectional views of the vicinity of the light emitter 101 from the side.As illustrated in the figure, the light emitter 101 includes, protruding beyond the board 111 and the transducer 112, an insertion portion 113 provided on a side of the board 111 opposite to the side on which the transducer 112 is disposed.The insertion portion 113 is a cylindrical portion having an outer diameter that enables seamless insertion into the through hole 121 provided in the base 102, and an inner space that enables passage of the laser light L. Further, the insertion portion 113 has such a length that when inserted into the through hole 121, the insertion portion 113 displaces the locking component 141 of the light barrier 104 and causes the locking component 141 to rotate.The through hole 121 of the base 102 also serves as a mounting component for holding the inserted insertion portion 113 and mounting the light emitter 101 to the base 102.The light barrier 104 includes the blocking component 141, a biasing component (not shown), and the engaging component 149. Further, the locking component 141 is rotatably attached to the base 102 through the hinge 144. The biasing component is a coil spring and exerts a force that causes the blocking component 141 to be parallel to the surface of the base 102.Replacement Operation of Light EmitterNext, the replacement operation of the light emitter 101 will be described.As shown in phase (a) in FIG. 10, the light emitter 101 is attached to the base 102 by moving the laser light L in the optical axis direction (in the X axis direction in the figure) to insert the insertion portion 113 into the through hole 121 also serving as the attachment component.In a state where the light emitter 101 is inserted into the through hole 121, the blocking component 141 is slid by the insertion portion 113 to rotate and positioned at the opening position where the through hole 121, which is the optical path of the laser light L, is opened.Next, in phase (b) in FIG. 10, in a state in which the light emitter 101 is not attached to the through hole 121 of the base 102, the blocking component 141 is caused to be positioned by the biasing component at the blocking position in which the through hole 121 is blocked.Accordingly, in a process in which the light emitter 101 is removed from the base 102, the light emitter 101 can be securely removed without opening the optical path of the laser light L. Even when the insertion portion 113 of the light emitter 101 is inserted into the through hole 121 in the order (b) and then (a) which is the reverse of the above order, the light emitter 101 can be securely attached without opening the through hole 121.Further, in the case of Modification 4, the locking component 141 is disposed in a comparatively deep portion of the through hole 121, and therefore the locking component 141 cannot be touched by a person and therefore cannot be rotated unintentionally. In addition, since the blocking component 141 rotates after the tip of the insertion portion 113 is inserted into the through hole 121 and the through hole 121 is covered by the light emitter 101, the optical path of the laser light L is securely blocked during attachment of the light emitter 101. In addition, since the light emitter 101 is removed after the through hole 121 is blocked by the blocking component 141, the optical path can be securely blocked during the removal of the light emitter 101.Although the lighting device 100 according to the present invention has been described based on the above-described exemplary embodiment, the present invention is not limited to the exemplary embodiment.Although in the present embodiment, laser light is introduced into the lighting device 100 by being transmitted through the optical fiber 200 from the outside of the lighting device 100, the lighting device 100 is not limited to this shape. The lighting device 100 may include, for example, at an end of the housing 106, a semiconductor laser element capable of emitting laser light.Further, the shape of the lens 105 is not limited to that of the above-described embodiment, but may be arbitrarily selected based on the desired light distribution.Forms obtained by various modifications to the exemplary embodiment and that can be realized by a person skilled in the art, as well as forms obtained by arbitrarily combining structural components and functions in the exemplary embodiment, are included in the present invention so as to correspond to the spirit of the present invention.List of reference characters100 Lighting device 101 Light emitter 102 Base 103 Mounting component 104 Light barrier 141 Blocking component 142 Bias component

Claims

A lighting device (100) comprising: a base (102) including a through hole (121) aligned with an optical path of laser light (L) for receiving and transmitting the laser light (L); a light emitter (101) that, when irradiated with the laser light (L) transmitted through the through hole (121), emits light by converting a wavelength of the laser light (L); a mounting component (103) provided on the base (102) for mounting the light emitter (101) on the base (102), wherein the light emitter (101) is removable from the base (102); a blocking component (141) that blocks the optical path of the laser light (L); A biasing component (142) that applies a force to the blocking component (141), wherein the optical path is opened by the blocking component (141) moved against the biasing component (142) when the blocking component (141) contacts the light emitter (101) attached to the attachment component (103), and the optical path is blocked by the blocking component (141) moved by the force of the biasing component (142) when the light emitter (101) is removed from the base (102).The lighting device according to claim 1, wherein the light emitter (101) is: attached to and removed from the base (102) by sliding along the attachment component (103); and is positioned in a blocking position in which the optical path is blocked when the light emitter (101) is removed from the attachment component (103), and is positioned in an opening position in which the optical path is opened when the light emitter (101) is attached to the attachment component (103).The lighting device according to claim 2, wherein the blocking component (141) is slidably mounted on the base (102), and the biasing component (142) applies the force to the blocking component (141) in a sliding direction of the blocking component (141) to position the blocking component (141) in the blocking position when the light emitter (101) is removed from the mounting component (103) and to position the blocking component (141) in the opening position when the light emitter (101) is mounted on the mounting component (103).The lighting device according to claim 3, wherein the blocking component (141) is disposed closer to a laser light entrance side of the base (102) compared to the light emitter (101).The lighting device according to claim 2, wherein the locking component (141): is rotatably mounted on the base (102); and further includes an engagement component (149) that positions the locking component (141) in the locking position when the light emitter (101) is not mounted on the mounting component (103) and engages the light emitter (101) to cause the locking component (141) to rotate to the opening position when the light emitter (101) is mounted on the mounting component (103).The lighting device according to claim 1, wherein the light emitter (101) is: attached to and removed from the base (102) by being moved in an optical axis direction of the laser light (L) with respect to the attachment component (103); includes an insertion portion (113) inserted into the base (102); and is positioned in a blocking position in which the optical path is blocked when the light emitter (101) is removed from the attachment component (103), and in that the insertion portion (113) presses it is positioned in an opening position in which the optical path is opened when the light emitter (101) is attached to the attachment component (103).

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