WO2024048307A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
WO2024048307A1
WO2024048307A1 PCT/JP2023/029738 JP2023029738W WO2024048307A1 WO 2024048307 A1 WO2024048307 A1 WO 2024048307A1 JP 2023029738 W JP2023029738 W JP 2023029738W WO 2024048307 A1 WO2024048307 A1 WO 2024048307A1
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WO
WIPO (PCT)
Prior art keywords
lighting device
opening
lens
housing
wavelength
Prior art date
Application number
PCT/JP2023/029738
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English (en)
Japanese (ja)
Inventor
範高 新納
Original Assignee
京セラ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Publication of WO2024048307A1 publication Critical patent/WO2024048307A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • F21V7/00—Reflectors 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
    • F21V9/35—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material at focal points, e.g. of refractors, lenses, reflectors or arrays of light sources

Definitions

  • the present disclosure relates to a lighting device.
  • a lighting device is disclosed.
  • One embodiment of the lighting device includes a housing, a light source, an optical system, a first member, and a second member.
  • the casing has a first opening that opens to the outside, and a first portion that has a second opening that opens to the outside.
  • the light source emits excitation light.
  • the optical system is located in an internal space of the housing.
  • the first member includes a wavelength conversion section that emits fluorescence having a wavelength spectrum different from that of the excitation light in response to irradiation of the excitation light from the light source, and a base section to which the wavelength conversion section is fixed.
  • the second member is fixed to the housing from the first opening side, and has a third opening through which the fluorescent light passes.
  • the optical system includes a wavelength separation filter that guides the excitation light from the light source to the wavelength conversion section and guides the fluorescence from the wavelength conversion section to the first aperture, and a wavelength separation filter that guides the excitation light from the light source to the first aperture.
  • a lens optical system including one or more lenses positioned on the optical path of the fluorescent light.
  • the base part covers the second opening from the outside, and is fixed to the housing in a manner that it can be removed to the outside.
  • the wavelength conversion unit is located in a state where it is exposed to the internal space.
  • the optical system is sandwiched between the second member and the inner surface of the housing.
  • FIG. 1 is a front view schematically showing the appearance of an example of the lighting device according to the first embodiment.
  • FIG. 2 is a plan view schematically showing the appearance of an example of the lighting device according to the first embodiment.
  • FIG. 3 is a cross-sectional view schematically showing a cross section of an example of the lighting device taken along line III-III in FIG. 2.
  • FIG. 4 is a diagram for explaining an example of a method for assembling the lighting device according to the first embodiment.
  • FIG. 5 is a bottom view schematically showing an example of the configuration of the first member.
  • FIG. 6 is a plan view schematically showing an example of the configuration of the casing.
  • FIG. 7 is a diagram schematically showing an example of how the first member is removed from the housing.
  • FIG. 1 is a front view schematically showing the appearance of an example of the lighting device according to the first embodiment.
  • FIG. 2 is a plan view schematically showing the appearance of an example of the lighting device according to the first embodiment.
  • FIG. 3 is
  • FIG. 8 is a front view schematically showing an example of the appearance of the lighting device according to the second embodiment.
  • FIG. 9 is a diagram schematically showing an example of how the heat dissipation member is removed from the lighting device according to the second embodiment.
  • FIG. 10 is a front view schematically showing the appearance of another example of the lighting device according to the second embodiment.
  • FIG. 11 is a plan view schematically showing an example of the appearance of the lighting device according to the third embodiment.
  • FIG. 12 is a sectional view schematically showing the first member and the vicinity of the first member in a cross section of an example of the lighting device according to the third embodiment.
  • FIG. 13 is a bottom view schematically showing an example of the configuration of the first member of the lighting device according to the third embodiment.
  • FIG. 14 is a diagram schematically showing an example of how the base portion is released from being fixed to the housing in the lighting device according to the third embodiment.
  • FIG. 15 is a cross-sectional view schematically showing an example of the configuration of the lighting device according to the fourth embodiment.
  • FIG. 16 is a front view schematically showing the appearance of a lighting device according to another first example.
  • FIG. 17 is a cross-sectional view schematically showing an example of a cross section of a lighting device according to another first example at a position corresponding to line III-III in FIG. 2.
  • FIG. 18 is a cross-sectional view schematically showing an example of a cross section at a position corresponding to line III-III in FIG. 2 of a lighting device according to another second example.
  • FIG. 19 is a cross-sectional view schematically showing an example of a cross section at a position corresponding to line III-III in FIG. 2 of a lighting device according to another third example.
  • FIG. 20 is a sectional view schematically showing the configuration of an example of a mounting mechanism in a lighting device according to another fourth example.
  • FIG. 21 is a cross-sectional view schematically showing an example of a state in which the first member is being removed from the housing in a lighting device having an example attachment mechanism.
  • FIG. 22 is a cross-sectional view schematically showing an example of a lighting device having an attachment mechanism according to an example, with the first member removed from the casing.
  • FIG. 23 is a sectional view schematically showing the configuration of another example of the attachment mechanism in the lighting device according to another fourth example.
  • FIG. 24 is a cross-sectional view schematically showing an example of a state in the middle of removing the first member from the housing in a lighting device having an attachment mechanism according to another example.
  • FIG. 25 is a cross-sectional view schematically showing an example of a lighting device having an attachment mechanism according to another example, with the first member removed from the housing.
  • the inventor of the present disclosure has created a technology that can extend the life of a lighting device and make it easier to handle.
  • FIGS. 1 to 25 A right-handed XYZ coordinate system is shown in FIGS. 1 to 25.
  • the first direction in which light is emitted from the lighting device 1 is the -Z direction
  • one direction perpendicular to the first direction is the +X direction
  • the -Z direction and the +X direction One direction perpendicular to both is defined as the +Y direction.
  • First embodiment> A lighting device 1 according to a first embodiment will be described with reference to FIGS. 1 to 7.
  • FIG. 1 is a front view schematically showing the appearance of an example of the lighting device 1 according to the first embodiment.
  • FIG. 2 is a plan view schematically showing the appearance of an example of the lighting device 1 according to the first embodiment.
  • FIG. 3 is a cross-sectional view schematically showing a cross section of an example of the illumination device 1 taken along line III-III in FIG. 2.
  • FIG. 4 is a diagram for explaining an example of a method for assembling the lighting device 1 according to the first embodiment.
  • FIG. 5 is a bottom view schematically showing an example of the configuration of the first member 40, which will be described later.
  • FIG. 6 is a plan view schematically showing an example of the configuration of the casing 10, which will be described later.
  • FIG. 1 is a front view schematically showing the appearance of an example of the lighting device 1 according to the first embodiment.
  • FIG. 2 is a plan view schematically showing the appearance of an example of the lighting device 1 according to the first embodiment.
  • FIG. 3 is a cross-sectional view
  • FIG. 7 is a diagram schematically showing an example of how the first member 40 is removed from the housing 10.
  • a cross section of the illumination device 1 taken along line III-III in FIG. 2 is a cross section including a first optical axis Ax1 and a second optical axis Ax2, which will be described later, in the illumination device 1.
  • hidden lines depicting examples of the outer edges of some configurations are schematically shown as thin broken lines.
  • the illumination device 1 is a device that can emit fluorescence L1 as illumination light into the illumination space S1.
  • an example of the outer edge of the fluorescence L1 is schematically shown by a thin two-dot chain line.
  • the illumination space S1 is, for example, an indoor space of a building.
  • the lighting device 1 is arranged, for example, on a ceiling located above the lighting space S1.
  • the lighting device 1 includes a housing 10, a light source 20, an optical system 30, a first member 40, and a second member 50. Further, in the first embodiment, the lighting device 1 includes a holding mechanism 60.
  • the housing 10 is a part that houses the optical system 30.
  • the housing 10 has an internal space 10is.
  • the internal space 10is is a space surrounded by the inner surface 10if of the housing 10.
  • the housing 10 has a first opening 10a.
  • the housing 10 has a first portion 12 in which a second opening 10b exists.
  • the first opening 10a and the second opening 10b each open to the outside Ex1 of the housing 10.
  • an object having a cylindrical shape (also referred to as a cylindrical body) is applied to the housing 10.
  • the second opening 10b is located on the opposite side of the first opening 10a across the internal space 10is.
  • the housing 10 has a cylindrical portion 11 and a first portion 12.
  • the cylindrical portion 11 and the first portion 12 may be composed of one member, or may have a structure in which two or more members are integrated by connection, adhesion, or bonding. .
  • the cylindrical portion 11 may have a hollow space along the ⁇ Z direction as the first direction.
  • the cylindrical portion 11 may have, for example, a longitudinal direction along the ⁇ Z direction as the first direction.
  • This cylindrical portion 11 may be, for example, a linear (also referred to as I-shaped) cylindrical portion having a longitudinal direction along the -Z direction as the first direction.
  • the cylindrical portion 11 may be any of a cylindrical portion having a cylindrical hollow space, an elliptical cylindrical portion having an elliptical cylindrical hollow space, and a prismatic cylindrical portion having a prismatic hollow space. It's okay.
  • the cylindrical portion 11 has a first end E1 and a second end E2 at both ends in the longitudinal direction.
  • the first end portion E1 is a portion of the cylindrical portion 11 located at the end on the ⁇ Z direction side as the first direction.
  • the second end E2 is a portion of the cylindrical portion 11 located at the end on the +Z direction side, which is the opposite direction to the first direction.
  • the first opening 10a is configured, for example, by the inner circumferential surface of the first end E1.
  • the first opening 10a opens in the -Z direction, which is the first direction, at the end of the housing 10 in the -Z direction, which is the first direction.
  • the cross-sectional shape of the first opening 10a may be, for example, circular.
  • the cross-sectional shape of the first aperture 10a may be the shape of a cross-section of the first aperture 10a perpendicular to the direction along the second optical axis Ax2, which will be described later.
  • the cross-sectional shape of the first opening 10a is not limited to a circular shape, but may be other shapes such as a polygonal shape or an elliptical shape.
  • the first portion 12 has a shape that projects inward from the second end E2 of the cylindrical portion 11.
  • a plate-shaped portion having a second opening 10b is adopted as the first portion 12 .
  • the first portion 12 has the second opening 10b as a through hole.
  • the second opening 10b opens in the +Z direction at the end of the housing 10 in the +Z direction.
  • the second opening 10b is a hole penetrating the first portion 12 in the +Z direction.
  • the cross-sectional shape of the second opening 10b is circular.
  • the cross-sectional shape of the second opening 10b may be the shape of a cross-section of the second opening 10b perpendicular to the direction in which the second opening 10b penetrates the first portion 12.
  • the cross-sectional size of the second opening 10b may or may not be constant in the direction in which the second opening 10b penetrates the first portion 12.
  • the inner circumferential surface forming the second opening 10b may be inclined such that the cross-sectional size of the second opening 10b becomes smaller as it approaches the inner space 10is.
  • the shape of the second opening 10b is not limited to a circular shape, but may be other shapes such as a polygonal shape or an elliptical shape.
  • the diameter d2 of the second opening 10b (also referred to as the second diameter) may be smaller than the diameter d1 of the first opening 10a (also referred to as the first diameter).
  • the lighting device 1 can be made lighter and have improved rigidity.
  • the material of the housing 10 is not limited to aluminum alloy, and may be other materials such as synthetic resin.
  • the cylindrical portion 11 has a first introduction opening 10c that opens to the outside Ex1 of the housing 10.
  • the first introduction opening 10c is an opening for passing the excitation light L0 from the light source 20 and guiding the excitation light L0 to the internal space 10is of the housing 10.
  • the first introduction opening 10c is located at a first predetermined portion of the cylindrical portion 11 between the first end E1 and the second end E2.
  • the first predetermined portion may be a portion of the cylindrical portion 11 that is intermediate between the first end portion E1 and the second end portion E2 in the ⁇ Z direction as the first direction; It may be a portion closer to the first end E1 or the second end E2.
  • the first introduction opening 10c may pass through the cylindrical portion 11 along the -X direction as the second direction.
  • the cylindrical part 11 may have, for example, a thin part 111 and a thick part 112. Thick portion 112 has a greater thickness than thin portion 111 .
  • the thick portion 112 is a portion that protrudes outward from the thin portion 111.
  • the thick portion 112 may be positioned annularly along the circumferential direction of the cylindrical portion 11 .
  • the thick portion 112 is located at a second predetermined portion of the cylindrical portion 11 between the first end E1 and the second end E2.
  • the second predetermined portion may be a portion of the cylindrical portion 11 that is intermediate between the first end portion E1 and the second end portion E2 in the ⁇ Z direction as the first direction; It may be a portion closer to the first end E1 or the second end E2.
  • the first introduction opening 10c may penetrate the cylindrical portion 11 at the thick portion 112.
  • the light source 20 can emit excitation light L0.
  • an example of the outer edge of the excitation light L0 is schematically shown with a thin broken line, and an example of the optical axis (also referred to as the first optical axis) Ax1 of the light source 20 is schematically shown with a thin dashed line. has been done.
  • the first optical axis Ax1 is located along the -X direction as the second direction.
  • the second direction along the first optical axis Ax1 may be slightly inclined with respect to the -X direction. In other words, the second direction may not be perpendicular to the first direction, but may intersect with the first direction.
  • the light source 20 has an emitting portion (for example, an emitting surface) 20e that emits the excitation light L0.
  • the excitation light L0 for example, light having an intensity peak within a wavelength range of 380 nm to 415 nm is employed.
  • purple light having a wavelength (also referred to as a first peak wavelength) having a maximum intensity near 405 nm is employed.
  • the excitation light L0 is not necessarily limited to violet light, and may be, for example, blue light having a first peak wavelength near 450 nm.
  • the light source 20 is, for example, a semiconductor laser element such as a laser diode (LD), a vertical cavity surface emitting laser (VCSEL), a light emitting diode (LED), or a superluminescent laser.
  • a light emitting element such as a super luminescent diode (SLD) is used.
  • a light emitting end of a light emitting element is applied to the light emitting portion 20e.
  • a gallium nitride (GaN)-based semiconductor laser that emits 405 nm violet laser light as excitation light L0 can be applied to this light emitting element.
  • the light source 20 is fixed to the housing 10 by the mounting member 200.
  • the lighting device 1 includes a mounting member 200.
  • the attachment member 200 includes a first holding portion 21 and a protrusion 22 .
  • the first holding part 21 holds the light source 20.
  • the light source 20 may be fixed to the first holding part 21 by adhesion, fitting, joining, fastening, or the like.
  • the protruding portion 22 is a portion that protrudes from the first holding portion 21 in the ⁇ X direction, which is the second direction.
  • the protrusion 22 may have, for example, a cylindrical shape with a hollow space 22is penetrating in the ⁇ X direction as the second direction.
  • the protrusion 22 is positioned, for example, in a state where it is inserted into the first introduction opening 10c.
  • the first holding portion 21 is located, for example, in contact with or in close proximity to the outer peripheral surface of the cylindrical portion 11 (for example, the thick portion 112).
  • the mounting member 200 may be fixed to the housing 10 with a plurality of screws, or the male threaded portion on the outer circumferential surface of the protrusion 22 may be fitted into the female threaded portion on the inner circumferential surface of the first introduction opening 10c, and the mounting member 200 may be fixed to the housing 10 with a plurality of screws. It may be fixed to the body 10, or may be fixed to the housing 10 by adhesion, bonding, or the like.
  • the light source 20 may be fixed to the housing 10 using another member without using the mounting member 200, or may be directly fixed to the housing 10 by adhesive, fitting, joining, fastening, or the like.
  • the first member 40 includes a base portion 41 and a wavelength conversion portion 422.
  • the first member 40 may include a base portion 41 and a phosphor substrate 42 including a wavelength conversion portion 422.
  • the phosphor substrate 42 includes a second holding section 421 and a wavelength conversion section 422.
  • the wavelength conversion unit 422 is located exposed to the internal space 10is of the housing 10.
  • the wavelength converter 422 emits fluorescence L1 having a wavelength spectrum different from that of the excitation light L0 in response to irradiation with the excitation light L0 from the light source 20.
  • the wavelength conversion unit 422 has a surface exposed to the internal space 10is toward the ⁇ Z direction as the first direction.
  • the state where it is exposed to the internal space 10is includes a state where it can be irradiated with light from the internal space 10is.
  • the wavelength conversion section 422 includes a phosphor.
  • the wavelength at which the intensity of the fluorescence L1 has a maximum value is larger than the first peak wavelength of the excitation light L0. Fluorescence L1 is visible light.
  • the wavelength converter 422 has, for example, a plate-like or film-like shape.
  • the thickness direction of the wavelength conversion section 422 is set, for example, in a direction along a second optical axis Ax2, which will be described later.
  • the wavelength converter 422 uses, for example, BaMgAl 10 O 17 :Eu or (Sr, Ca, Ba) 10 (PO 4 ) 6 as a wavelength conversion material (also referred to as a fluorescent material) that converts the excitation light L0 into blue light. Cl 2 :Eu, (Sr, Ba) 10 (PO 4 ) 6 Cl 2 :Eu, etc. may be included.
  • the wavelength conversion unit 422 uses, for example, (Sr, Ba, Ca) 5 (PO 4 ) 3 Cl:Eu, Sr 4 Al 14 O 25 :Eu, etc. as a wavelength conversion material that converts the excitation light L0 into blue-green light. may include.
  • the wavelength conversion unit 422 uses, for example, SrSi 2 (O, Cl) 2 N 2 :Eu, (Sr, Ba, Mg) 2 SiO 4 :Eu 2+ , as a wavelength conversion material that converts the excitation light L0 into green light.
  • ZnS:Cu, Al, Zn 2 SiO 4 :Mn, etc. may be included.
  • the wavelength conversion unit 422 uses, for example, Y 2 O 2 S:Eu, Y 2 O 3 :Eu, SrCaClAlSiN 3 :Eu 2+ , CaAlSiN 3 :Eu, or as a wavelength conversion material that converts the excitation light L0 into red light.
  • the wavelength converter 422 may include 3Ga 5 O 12 :Cr or the like as a wavelength conversion material that converts the excitation light L0 into light having a wavelength in the near-infrared region. If the wavelength conversion unit 422 includes multiple types of wavelength conversion materials corresponding to multiple colors of light, the wavelength conversion unit 422 can emit fluorescence L1 with high color rendering properties. Specifically, when the excitation light L0 is light having a first peak wavelength in the range of 380 nm to 415 nm, and the wavelength converter 422 has a phosphor corresponding to three colors of red, green, and blue light. can improve the color rendering properties of the fluorescence L1. Furthermore, the wavelength conversion section 422 may include a resin such as a binder for connecting fine particles of phosphor to each other.
  • the second holding part 421 is a part that holds the wavelength conversion part 422.
  • the second holding section 421 may hold the wavelength conversion section 422 from the +Z direction side.
  • a plate-shaped member is applied to the second holding portion 421.
  • the second holding section 421 and the wavelength conversion section 422 constitute an integrated phosphor substrate 42.
  • the second holding part 421 may have a recess filled with the wavelength converting part 422, or may have a plate surface on which the wavelength converting part 422 is attached.
  • the material of the second holding part 421 may be, for example, a metal material or another inorganic material such as ceramics.
  • the material of the second holding part 421 is a material with higher thermal conductivity than the wavelength converting part 422, the speed at which heat is dissipated from the wavelength converting part 422 by the second holding part 421 can be increased. . This can reduce the extent to which the wavelength converter 422 deteriorates due to heat.
  • the material of the second holding part 421 may be a metal material with high thermal conductivity.
  • This metal material includes, for example, copper (Cu), aluminum (Al), magnesium (Mg), gold (Au), silver (Ag), iron (Fe), chromium (Cr), cobalt (Co), beryllium ( Applicable materials include Be), molybdenum (Mo), tungsten (W), and alloys.
  • the surface of the second holding portion 421 may have a property (also referred to as reflectivity) of reflecting the excitation light L0.
  • the reflectance of the excitation light L0 on the surface of the second holding part 421 may be 60% or more, 80% or more, or 90% or more.
  • the excitation light L0 that has passed through the wavelength conversion section 422 is reflected on the surface of the second holding section 421 and enters the wavelength conversion section 422 again.
  • the amount of fluorescence L1 emitted by the wavelength converter 422 can be increased.
  • the metal material of the second holding part 421 is Al, Mg, Ag, Fe, Cr, or Co
  • the reflectance of visible light on the surface of the second holding part 421 increases, and the excitation light L0
  • the amount of fluorescence L1 emitted by the wavelength converter 422 may increase depending on the wavelength conversion unit 422.
  • the base portion 41 is a portion to which the wavelength conversion portion 422 is fixed.
  • the wavelength conversion section 422 may be fixed to the base section 41 via the second holding section 421, for example.
  • the phosphor substrate 42 may be fixed to the base portion 41.
  • the second holding portion 421 may be fixed to the base portion 41 using, for example, grease having thermal conductivity and adhesive properties.
  • the second holding part 421 may be fixed to the base part 41 by, for example, joining, adhesion, fitting, or fastening using solder, etc., without using grease or the like.
  • the base portion 41 is positioned so as to cover the second opening 10b from the external Ex1 side of the housing 10. In other words, the base portion 41 is positioned so as to cover the second opening 10b from the outside Ex1 on the second end E2 side of the housing 10. In the example shown in FIGS. 1 to 3, the base portion 41 is located in a state covering the second end portion E2, the first portion 12, and the second opening 10b in the -Z direction as the first direction. There is.
  • the base portion 41 is fixed to the casing 10 in a state where it can be removed to the outside Ex1 side of the casing 10.
  • the first member 40 is fixed to the casing 10 in a state where it can be removed to the outside Ex1 side of the casing 10.
  • the base section 41 is in a state where the wavelength conversion section 422 is fixed to the housing 10.
  • the base section 41 to which the wavelength conversion section 422 is fixed can be removed from the housing 10.
  • the base portion 41 can be removed from the second end E2 side portion of the housing 10 in the +Z direction.
  • a configuration may be adopted in which the base portion 41 is fixed to the housing 10 with screws.
  • the male screw member Sw1 inserted into the through hole Th1 of the base part 41 is fitted into the screw hole Sh1 of the housing 10, so that the base part 41 is It may be fastened to the housing 10.
  • the base portion 41 may be fastened to the housing 10 by a plurality of sets of the through hole Th1, the male screw member Sw1, and the screw hole Sh1.
  • the base portion 41 has three through holes Th1 each penetrating in the -Z direction as the first direction.
  • the housing 10 has three screw holes Sh1 each recessed in the -Z direction as the first direction at the second end E2 as the plurality of screw holes Sh1.
  • the base portion 41 is removed from the casing 10 toward the outside Ex1 of the casing 10 by pulling out the plurality of male screw members Sw1 from the plurality of screw holes Sh1.
  • the first member 40 can be removed from the housing 10 toward the outside Ex1 of the housing 10.
  • FIG. 4 for the purpose of avoiding complication of illustration, an example of the outer edges of two of the three screw holes Sh1 are schematically shown by thin broken lines indicating hidden lines.
  • the base portion 41 may include, for example, a main body portion 411 and a convex portion 412.
  • the main body portion 411 and the convex portion 412 may be composed of one member, or may have a structure in which two or more members are integrated by connection, adhesion, bonding, or the like.
  • the main body portion 411 is a portion that is fixed to the casing 10 while covering the second opening 10b from the external Ex1 side of the casing 10.
  • the main body portion 411 may have a surface (also referred to as a first surface) 411b that covers the second opening 10b from the external Ex1 side of the housing 10.
  • the first surface 411b may be in contact with or close to the second end E2 of the housing 10 and the surface (also referred to as second surface) 12u of the first portion 12 on the external Ex1 side.
  • a plate-shaped portion is applied to the main body portion 411.
  • the main body 411 is a disc-shaped portion
  • the first surface 411b is oriented in the -Z direction as the first direction
  • the second surface 12u is oriented in the first direction. It faces the +Z direction, which is the opposite direction.
  • the convex portion 412 is a portion that protrudes from the main body portion 411 in the -Z direction as the first direction. More specifically, the convex portion 412 is in a state of protruding from the first surface 411b of the main body portion 411 in the ⁇ Z direction, for example.
  • the shape of the convex portion 412 may be, for example, a columnar shape such as a cylinder, an elliptical cylinder, or a prismatic shape, or a frustum-like shape such as a truncated cone, a truncated ellipse, or a truncated pyramid. may be applied.
  • the convex portion 412 has a surface (also referred to as a third surface) 412b facing the -Z direction as the first direction.
  • the convex portion 412 has a cylindrical shape.
  • the convex portion 412 may be fitted into the second opening 10b from the external Ex1 side of the housing 10.
  • the wavelength conversion section 422 may be fixed on the convex section 412.
  • the phosphor substrate 42 including the wavelength conversion section 422 may be fixed on the third surface 412b of the convex section 412. According to this configuration, when assembling the lighting device 1, by fitting the convex portion 412 of the base portion 41 into the second opening 10b from the outside Ex1 of the housing 10, the wavelength conversion portion 422 can be easily aligned. be able to.
  • the base portion 41 may be made of a metal material with high thermal conductivity.
  • This metal material may be, for example, Cu, Al, Mg, Au, Ag, Fe, Cr, Co, Be, Mo, W, or an alloy.
  • the material of the main body portion 411 and the material of the convex portion 412 may be the same or different.
  • the optical system 30 is located in the internal space 10is of the housing 10.
  • Optical system 30 includes a wavelength separation filter 31 and a lens optical system 32.
  • the outer diameter (also referred to as the third diameter) d3 of the optical system 30 when viewed through a plane in the direction along the second optical axis Ax2 is the diameter (the third diameter) of the first opening 10a of the housing 10. 1 diameter) is smaller than d1.
  • Wavelength separation filter Excitation light L0 from the light source 20 is incident on the wavelength separation filter 31.
  • the wavelength separation filter 31 guides the excitation light L0 from the light source 20 to the wavelength conversion section 422 of the first member 40. Further, the wavelength separation filter 31 guides the fluorescence L1 from the wavelength conversion section 422 to the first aperture 10a. More specifically, the wavelength separation filter 31 guides the fluorescence L1 from the wavelength conversion section 422 to the third opening 50a of the second member 50, which will be described later.
  • the wavelength conversion section 422, the wavelength separation filter 31, and the first aperture 10a are arranged in the -Z direction as the first direction.
  • the light source 20 and the wavelength separation filter 31 are lined up in the -X direction, which is a second direction that intersects the first direction.
  • the wavelength separation filter 31 reflects the excitation light L0 from the light source 20 toward the wavelength converter 422, and transmits the fluorescence L1 from the wavelength converter 422 toward the first aperture 10a. According to this configuration, the size of the lighting device 1 in the -X direction as the second direction can be reduced.
  • the wavelength separation filter 31 includes, for example, a base material 311 and a dielectric multilayer film 312.
  • a transparent member containing one or more of glass and resin is applied to the base material 311.
  • the shape of the base material 311 is, for example, a flat plate shape.
  • the base material 311 has a first plate surface 3a and a second plate surface 3b.
  • the first plate surface 3a is a surface of the base material 311 that is located on the side of the light source 20 and the wavelength conversion section 422.
  • the second plate surface 3b is a surface of the base material 311 located on the opposite side to the first plate surface 3a.
  • the dielectric multilayer film 312 is located, for example, on the first plate surface 3a or the second plate surface 3b of the base material 311.
  • the dielectric multilayer film 312 has, for example, a structure in which dielectric thin films are repeatedly stacked multiple times.
  • dielectric materials include silicon oxide (SiO 2 ), titanium oxide (TiO 2 ), aluminum oxide (Al 2 O 3 ), zirconium oxide (ZrO 2 ), tantalum oxide (Ta 2 O 5 ), and niobium oxide (Nb 2 O 3 ) are employed.
  • SiO 2 silicon oxide
  • TiO 2 titanium oxide
  • Al 2 O 3 aluminum oxide
  • ZrO 2 zirconium oxide
  • tantalum oxide Ta 2 O 5
  • niobium oxide Nb 2 O 3
  • the reflectance of the wavelength separation filter 31 for the excitation light L0 may be, for example, 80% or more, 90% or more, or 95% or more.
  • the transmittance of the wavelength separation filter 31 for the fluorescence L1 may be, for example, 80% or more, 90% or more, or 95% or more.
  • An angle ⁇ 1 between the wavelength separation filter 31 and a second optical axis Ax2, which will be described later, is an angle between the first plate surface 3a of the base material 311 and the second optical axis Ax2.
  • an example of the angle ⁇ 1 is indicated by a thin arc-shaped arrow.
  • the angle ⁇ 1 is set to approximately 45 degrees.
  • the angle ⁇ 1 may be an angle different from 45 degrees.
  • the wavelength separation filter 31 has a dielectric multilayer film for separating wavelengths on the first plate surface 3a, and may have an antireflection film on the second plate surface 3b. Thereby, compared to the case where the dielectric multilayer film is located on the second plate surface 3b, it is possible to reduce the possibility that the light intensity of the excitation light L0 and the fluorescence L1 will decrease due to absorption of light by the wavelength separation filter 31.
  • the lens optical system 32 includes one or more lenses 321 located on the optical path of the fluorescence L1 from the wavelength conversion unit 422 in the internal space 10is of the housing 10 to the first opening 10a.
  • the lens optical system 32 includes, as one or more lenses 321, a first lens 321a, a second lens 321b, and a third lens 321c.
  • an example of the optical axis (also referred to as the second optical axis) Ax2 of the first lens 321a is schematically shown by a thin dashed line.
  • the first lens 321a, the second lens 321b, and the third lens 321c are arranged in the ⁇ Z direction as the first direction on the second optical axis Ax2.
  • the first lens 321a and the second lens 321b are located between the wavelength conversion section 422 and the wavelength separation filter 31.
  • the third lens 321c is located between the wavelength separation filter 31 and the first aperture 10a.
  • Each of the one or more lenses 321 is made of one or more materials of glass and resin, for example.
  • the excitation light L0 from the light source 20 is reflected by the wavelength separation filter 31, passes through the second lens 321b and the first lens 321a in this order, and enters the wavelength conversion section 422.
  • the second lens 321b and the first lens 321a condense the excitation light L0 reflected by the wavelength separation filter 31 onto the wavelength conversion section 422.
  • a biconvex lens is applied to each of the first lens 321a and the second lens 321b.
  • the excitation light L0 passes through the second lens 321b and the first lens 321a in order, so that the degree of spread of the excitation light L0 is gradually reduced.
  • the size of the cross section perpendicular to the second optical axis Ax2 of the excitation light L0 traveling from the wavelength separation filter 31 to the wavelength conversion section 422 becomes smaller in stages.
  • the wavelength conversion unit 422 emits fluorescence L1 according to the incident excitation light L0.
  • This fluorescence L1 travels from the wavelength converter 422 at a large spread angle, passes through the first lens 321a and the second lens 321b, and enters the wavelength separation filter 31.
  • the first lens 321a and the second lens 321b transmit the fluorescence L1 toward the effective surface of the wavelength separation filter 31.
  • the effective surface here refers to the range in which the filter function of the wavelength separation filter 31 can be realized.
  • the fluorescence L1 passes through the first lens 321a and the second lens 321b in order, so that the degree of spread of the fluorescence L1 is gradually reduced.
  • the size of the cross section perpendicular to the second optical axis Ax2 of the fluorescence L1 traveling from the wavelength conversion unit 422 to the wavelength separation filter 31 decreases in stages. Therefore, the spread angle of the fluorescence L1 from the wavelength converter 422 is reduced by the first lens 321a and the second lens 321b. As a result, more fluorescence L1 can be guided to the wavelength separation filter 31 without increasing the size of the wavelength separation filter 31.
  • the size of the cross section perpendicular to the second optical axis Ax2 of the fluorescence L1 transmitted through the second lens 321b decreases toward the third lens 321c, and then increases after passing through the waist portion BW.
  • the waist portion BW is a portion where the cross section perpendicular to the second optical axis Ax2 of the fluorescence L1 is the smallest between the second lens 321b and the third lens 321c.
  • the waist portion BW may be located at a position overlapping the central portion of the wavelength separation filter 31 in the direction along the second optical axis Ax2 (also referred to as the optical axis direction).
  • the first lens 321a and the second lens 321b may be designed such that the waist portion BW overlaps the center portion of the wavelength separation filter 31 in the optical axis direction.
  • the wavelength separation filter 31 transmits the fluorescence L1 toward the first aperture 10a.
  • the fluorescence L1 from the wavelength separation filter 31 is transmitted through the third lens 321c, passes through the first aperture 10a, and is emitted into the illumination space S1.
  • the fluorescence L1 from the wavelength separation filter 31 is transmitted through the third lens 321c, passes through the first aperture 10a and the third aperture 50a, which will be described later, and is emitted into the illumination space S1.
  • the number of lenses 321 located between the wavelength converter 422 and the wavelength separation filter 31 is not limited to two, but may be one, or may be three or more. good.
  • the third lens 321c may not exist.
  • the holding mechanism 60 holds the optical system 30 within the housing 10.
  • retention mechanism 60 includes one or more retention members 61.
  • the one or more holding members 61 include a first holding member 61a, a second holding member 61b, a third holding member 61c, and a fourth holding member 61d.
  • the plurality of holding members 61 may be made of the same material as the housing 10, or may be made of a different material from the housing 10.
  • the material of the plurality of holding members 61 may be, for example, aluminum alloy or other materials such as synthetic resin.
  • the first holding member 61a may function as a lens holder that holds the first lens 321a between it and the first portion 12 of the housing 10. As shown in FIG. 3, the first holding member 61a is located between the first lens 321a and the second lens 321b. The outer peripheral portion of the first lens 321a may be sandwiched between the first portion 12 and the first holding member 61a in the optical axis direction. The outer circumferential portion of the first lens 321a may be a portion of the outer circumference of the first lens 321a centered on the second optical axis Ax2.
  • the first holding member 61a has, for example, a cylindrical shape surrounding the second optical axis Ax2.
  • the inner circumferential portion of the first holding member 61a may have one or more convex portions for pressing the outer circumferential portion of the first lens 321a against the first portion 12, for example.
  • the inner peripheral portion of the first holding member 61a may be an inner peripheral portion of the first holding member 61a located near the second optical axis Ax2.
  • the one or more convex portions may be, for example, one convex portion having an annular shape centered on the second optical axis Ax2, or two convex portions arranged in the circumferential direction centered on the second optical axis Ax2. There may be more than one convex portion.
  • the inner peripheral surface of the first holding member 61a is located closer to the second optical axis Ax2 than the outer peripheral surface of the second lens 321b.
  • the inner circumferential surface of the first holding member 61a may be an inner circumferential surface of the first holding member 61a located near the second optical axis Ax2.
  • the outer circumferential surface of the second lens 321b may be an outer circumferential surface centered on the second optical axis Ax2 of the second lens 321b.
  • the outer circumferential surface of the second lens 321b includes a surface of the second lens 321b located on the wavelength conversion unit 422 side and a surface of the second lens 321b located on the wavelength separation filter 31 side. It may be an annular side surface connecting the two surfaces.
  • the outer peripheral surface of the first holding member 61a may be in contact with the inner peripheral surface of the cylindrical portion 11.
  • the outer circumferential surface of the first holding member 61a may be an outer circumferential surface centered on the second optical axis Ax2 of the first holding member 61a.
  • the outer peripheral surface of the first holding member 61a may fit into the inner peripheral surface of the cylindrical portion 11. For example, if a structure is adopted in which the male threaded part on the outer peripheral surface of the first holding member 61a is fitted into the female threaded part on the inner peripheral surface of the cylindrical part 11, during transportation and use of the lighting device 1, The occurrence of positional deviation (also referred to as positional deviation) of the first lens 321a can be reduced.
  • the outer peripheral surface of the first holding member 61a may be fixed to the inner peripheral surface of the cylindrical portion 11 by adhesive or the like.
  • the outer peripheral surface of the second lens 321b may be in contact with the inner peripheral surface of the cylindrical portion 11.
  • the second lens 321b may fit into the inner circumferential surface of the cylindrical portion 11.
  • the first holding member 61a can function as a spacer that determines the distance between the first lens 321a and the second lens 321b.
  • the illumination device 1 includes the first lens as a spacer sandwiched between the first lens 321a and the second lens 321b. If the holding member 61a is provided, the distance between the first lens 321a and the second lens 321b can be easily set.
  • the outer circumferential portion of the second lens 321b may be a portion of the outer circumference of the second lens 321b centered on the second optical axis Ax2.
  • the second holding member 61b can function as a lens holder that holds the second lens 321b together with the first holding member 61a. As shown in FIG. 3, the second holding member 61b is located between the second lens 321b and the wavelength separation filter 31.
  • the second holding member 61b has, for example, a cylindrical shape surrounding the second optical axis Ax2.
  • the inner peripheral surface of the second holding member 61b is located closer to the second optical axis Ax2 than the outer peripheral surface of the second lens 321b.
  • the inner circumferential surface of the second holding member 61b may be an inner circumferential surface located near the second optical axis Ax2 of the second holding member 61b.
  • the outer peripheral surface of the second holding member 61b may be in contact with the inner peripheral surface of the cylindrical portion 11.
  • the outer circumferential surface of the second holding member 61b may be an outer circumferential surface centered on the second optical axis Ax2 of the second holding member 61b.
  • the outer peripheral portion of the second lens 321b may be sandwiched between the first holding member 61a and the second holding member 61b in the optical axis direction.
  • the edge portion of the first holding member 61a on the second lens 321b side is in contact with the outer peripheral portion of the surface of the second lens 321b located on the wavelength conversion unit 422 side.
  • the edge portion of the second holding member 61b on the second lens 321b side is in contact with the outer peripheral portion of the surface of the second lens 321b located on the wavelength separation filter 31 side.
  • the edge portion of the second holding member 61b on the wavelength separation filter 31 side may be in contact with the outer peripheral portion of the wavelength separation filter 31, for example.
  • the second holding member 61b can function as a spacer that determines the distance between the second lens 321b and the wavelength separation filter 31.
  • the outer periphery of the wavelength separation filter 31 may be a portion of the outer periphery of the wavelength separation filter 31 centered on the second optical axis Ax2.
  • the end surface of the second holding member 61b facing the wavelength separation filter 31 may have a shape along the first plate surface 3a facing the wavelength conversion section 422 side of the wavelength separation filter 31.
  • the second holding member 61b may have a second introduction opening 61ba.
  • the second introduction opening 61ba is continuously connected to the first introduction opening 10c.
  • the second introduction opening 61ba is an opening for passing the excitation light L0 emitted from the light source 20 and passing through the first introduction aperture 10c, and guiding the excitation light L0 to the internal space 10is of the housing 10.
  • the second introduction opening 61ba passes through the second holding member 61b along the -X direction as the second direction.
  • the third holding member 61c can function as a filter holder 60h holding the wavelength separation filter 31 together with the second holding member 61b. As shown in FIG. 3, the third holding member 61c is located between the wavelength separation filter 31 and the third lens 321c.
  • the third holding member 61c has, for example, a cylindrical shape surrounding the second optical axis Ax2.
  • the outer peripheral surface of the third holding member 61c may be in contact with the inner peripheral surface of the cylindrical portion 11.
  • the outer circumferential surface of the third holding member 61c may be an outer circumferential surface centered on the second optical axis Ax2 of the third holding member 61c.
  • the edge portion of the third holding member 61c on the wavelength separation filter 31 side may be in contact with the outer peripheral portion of the wavelength separation filter 31, for example.
  • the edge of the third holding member 61c on the wavelength separation filter 31 side is in contact with the outer peripheral portion of the second plate surface 3b of the wavelength separation filter 31.
  • the end surface of the third holding member 61c facing the wavelength separation filter 31 may have a shape along the second plate surface 3b of the wavelength separation filter 31 facing the third lens 321c side.
  • the outer peripheral portion of the wavelength separation filter 31 may be sandwiched between the second holding member 61b and the third holding member 61c in the optical axis direction.
  • the edge portion of the second holding member 61b on the wavelength separation filter 31 side is in contact with the outer peripheral portion of the surface of the wavelength separation filter 31 located on the wavelength conversion section 422 side.
  • the edge portion of the third holding member 61c on the side of the wavelength separation filter 31 is in contact with the outer peripheral portion of the surface of the wavelength separation filter 31 located on the opposite side to the wavelength conversion section 422.
  • An adhesive may be placed between the wavelength separation filter 31 and the second holding member 61b. An adhesive may be placed between the wavelength separation filter 31 and the third holding member 61c. An adhesive may be placed between the wavelength separation filter 31 and the inner peripheral surface of the cylindrical portion 11. An adhesive may be located between the second holding member 61b and the inner peripheral surface of the cylindrical portion 11. An adhesive may be located between the third holding member 61c and the inner circumferential surface of the cylindrical portion 11.
  • the third holding member 61c can be attached to the wavelength separation filter 31 and the third lens. It can function as a spacer to determine the distance from 321c.
  • the outer circumferential portion of the third lens 321c may be a portion of the outer circumference of the third lens 321c centered on the second optical axis Ax2.
  • the fourth holding member 61d can function as a lens holder that holds the third lens 321c together with the third holding member 61c.
  • the fourth holding member 61d is located between the third lens 321c and the second member 50.
  • the fourth holding member 61d has, for example, a cylindrical shape surrounding the second optical axis Ax2.
  • the inner peripheral surface of the fourth holding member 61d is located closer to the second optical axis Ax2 than the outer peripheral surface of the third lens 321c.
  • the inner circumferential surface of the fourth holding member 61d may be an inner circumferential surface located near the second optical axis Ax2 of the fourth holding member 61d.
  • the outer peripheral surface of the third lens 321c may be an outer peripheral surface centered on the second optical axis Ax2 of the third lens 321c.
  • the outer peripheral surface of the third lens 321c is a surface of the third lens 321c located on the wavelength separation filter 31 side, and a surface of the third lens 321c located on the first aperture 10a side. This is the annular side surface that connects the two sides.
  • the outer peripheral portion of the third lens 321c may be held between the third holding member 61c and the fourth holding member 61d in the optical axis direction.
  • the edge portion of the third holding member 61c on the third lens 321c side is in contact with the outer peripheral portion of the surface of the third lens 321c on the wavelength separation filter 31 side.
  • the edge portion of the fourth holding member 61d on the third lens 321c side is in contact with the outer peripheral portion of the surface of the third lens 321c on the first opening 10a side.
  • the outer peripheral surface of the fourth holding member 61d may be in contact with the inner peripheral surface of the cylindrical portion 11.
  • the outer circumferential surface of the fourth holding member 61d may be an outer circumferential surface centered on the second optical axis Ax2 of the fourth holding member 61d.
  • Occurrence of positional deviation of the third lens 321c can be reduced.
  • the outer peripheral surface of the fourth holding member 61d may be fixed to the inner peripheral surface of the cylindrical portion 11 by adhesive or the like.
  • the outer peripheral surface of the third lens 321c may be in contact with the inner peripheral surface of the cylindrical portion 11.
  • the third lens 321c may fit into the inner peripheral surface of the cylindrical portion 11.
  • Second member> The second member 50 is located in a state where it is fixed to the housing 10 from the first opening 10a side. In the example of FIG. 3, the second member 50 is fixed to the first end E1 of the cylindrical portion 11, which is opposite to the second end E2 from which the first portion 12 protrudes inward. It is in.
  • the second member 50 may include, for example, a plate-shaped portion 51 and a protruding portion 52.
  • the plate-like portion 51 has a plate-like shape. In the example of FIG. 3, the thickness direction of the plate-like portion 51 is along the optical axis direction.
  • the plate-shaped portion 51 has a surface (also referred to as a fourth surface) 51u located on the housing 10 side.
  • the protruding portion 52 is a portion that protrudes from the fourth surface 51u of the plate-like portion 51 toward the wavelength separation filter 31 along the optical axis direction.
  • the protrusion 52 may have a cylindrical shape, for example.
  • the protruding portion 52 is inserted into the internal space 10is along the inner surface of the cylindrical portion 11 and is fixed to the cylindrical portion 11.
  • the protruding portion 52 may have a male threaded portion fitted into a female threaded portion located on the inner peripheral portion of the cylindrical portion 11 on the first end E1 side.
  • the protruding portion 52 may be fixed to the cylindrical portion 11 by, for example, adhesion, bonding, or fitting.
  • the second member 50 may be in contact with the fourth holding member 61d.
  • the plate-shaped portion 51 of the second member 50 is in contact with the edge portion of the fourth holding member 61d on the second member 50 side.
  • the fourth surface 51u may be in contact with the first end E1.
  • the second member 50 has a third opening 50a through which the fluorescent light L1 passes.
  • the plate-like portion 51 may have the third opening 50a.
  • the third opening 50a of the second member 50 is located on the illumination space S1 side of the first opening 10a of the housing 10. Therefore, the fluorescence L1 passes through the third opening 50a after passing through the first opening 10a.
  • the third opening 50a passes through the center of the plate-like portion 51 in the optical axis direction.
  • the diameter of the third opening 50a is, for example, smaller than the inner diameter of the fourth holding member 61d. As shown in FIG.
  • the cross section perpendicular to the optical axis direction increases. may be inclined with respect to the second optical axis Ax2 in such a way that the area (also referred to as aperture area) is increased.
  • the first inner circumferential surface 51s may be inclined with respect to the central axis of the third opening 50a such that the first inner circumferential surface 51s moves away from the central axis of the third opening 50a as it approaches the illumination space S1.
  • the second member 50 is in a state where the optical system 30 is sandwiched between the second member 50 and the inner surface 10if of the housing 10.
  • the optical system 30 is sandwiched between the second member 50 and the inner surface 10if of the housing 10.
  • the optical system 30 is sandwiched between the first portion 12 of the housing 10 and the second member 50. More specifically, the optical system 30 and the plurality of holding members 61 are sandwiched between the first portion 12 of the housing 10 and the plate-shaped portion 51 of the second member 50.
  • the material of the second member 50 may be aluminum alloy or various synthetic resins. Note that the second member 50 may have a structure in which a plurality of constituent members are connected by adhesion, bonding, fitting, fastening, or the like.
  • the above holding member 61 can be inserted into the internal space 10is of the housing 10 through the first opening 10a.
  • the first lens 321a, the first holding member 61a, the second lens 321b, the second holding member 61b, the wavelength separation filter 31, the third holding member 61c, the third lens 321c, and the fourth holding member 61d In this order of description, they can be inserted into the internal space 10is of the housing 10 through the first opening 10a.
  • the optical system 30 By fixing the second member 50 to the housing 10 from the first opening 10a side, the optical system 30 can be sandwiched between the second member 50 and the inner surface 10if of the housing 10. More specifically, as in the example of FIG. The optical system 30 can be sandwiched between the portion 12 and the second member 50. Through this step, the optical system 30 can be easily fixed in the internal space 10is of the housing 10.
  • each of the first lens 321a, first holding member 61a, second lens 321b, second holding member 61b, wavelength separation filter 31, third holding member 61c, third lens 321c, and fourth holding member 61d It may or may not be fixed to the housing 10.
  • the first lens 321a, the first holding member 61a, the second lens 321b, the second holding member 61b, the wavelength separation filter 31, the third holding member 61c, the third lens 321c, and the fourth holding member 61d are It may be fixed to the housing 10 by sandwiching the first part 12 and the second member 50.
  • the light source 20 may be fixed to the housing 10 by fixing the light source 20 to the housing 10 .
  • the base portion 41 can be fixed to the casing 10 in a state where it can be removed to the outside Ex1 side of the casing 10.
  • the base portion 41 can be fixed to the casing 10 using a plurality of male screw members Sw1 in a state where it can be removed to the outside Ex1 side of the casing 10.
  • the base part 41 is fastened to the housing 10 by inserting each male screw member Sw1 into the through hole Th1 of the base part 41 and fitting it into the screw hole Sh1 of the housing 10. Can be done.
  • the plurality of through holes Th1 may be located at a plurality of locations around the second optical axis Ax2. These multiple locations include a first location where one through hole Th1 is located, and a first predetermined angle (first predetermined angle) about the second optical axis Ax2 with this first location as a reference. (also referred to as an angle) includes two or more locations where the rotation of ⁇ 0 is sequentially performed.
  • first predetermined angle first predetermined angle
  • FIGS. 2 and 5 an example of the second optical axis Ax2 is indicated by a black circle
  • an example of the first predetermined angle ⁇ 0 is indicated by a thin arc-shaped arrow.
  • the plurality of screw holes Sh1 may be located at a plurality of locations around the second optical axis Ax2. These multiple locations include the first location where one screw hole Sh1 is located, and rotation by a first predetermined angle ⁇ 0 around the second optical axis Ax2 based on this first location. and two or more locations.
  • an example of the second optical axis Ax2 is shown by a black circle, and an example of the first predetermined angle ⁇ 0 is shown by a thin arc-shaped arrow.
  • the three through holes Th1 may be located at three locations centered on the second optical axis Ax2. These three locations are the first location where one through hole Th1 is located, and the location after rotating 120 degrees around the second optical axis Ax2 based on this first location. Contains two locations.
  • the three screw holes Sh1 may be located at three locations centered on the second optical axis Ax2. These three locations are the first location where one screw hole Sh1 is located, and the location after rotating 120 degrees around the second optical axis Ax2 based on this first location. Contains two locations.
  • the cross-sectional shape of the second aperture 10b is a circular shape centered on the second optical axis Ax2
  • the shape of the convex portion 412 is a cylindrical shape or a truncated cone shape centered on the second optical axis Ax2
  • the convex portion 412 has a circular shape centered on the second optical axis Ax2.
  • the portion 412 is fitted into the second opening 10b.
  • the plurality of screw holes Sh1 and the plurality of through holes Th1 can be easily aligned. Can be done.
  • the optical system 30 is sandwiched between the inner surface 10if of the housing 10 and the second member 50 fixed to the housing 10 from the first opening 10a side.
  • the optical system 30 is sandwiched between the first portion 12 of the housing 10 and the second member 50 fixed to the housing 10 from the first opening 10a side.
  • the base portion 41 of the first member 40 is located in a state covering the second opening 10b from the external Ex1 side of the casing 10, and can be removed from the external Ex1 side of the casing 10. It is in a state where it is fixed to the housing 10.
  • the base portion 41 to which the wavelength converter 422 is fixed can be removed from the casing 10 while the optical system 30 is fixed in the internal space 10is of the casing 10.
  • the first member 40 including the wavelength conversion section 422 can be removed from the housing 10 while the optical system 30 is fixed in the internal space 10is of the housing 10.
  • the base portion 41 can be removed from the casing 10 toward the outside Ex1 of the casing 10 by removing the plurality of male screw members Sw1 from the plurality of screw holes Sh1.
  • the first member 40 can be removed from the housing 10 toward the outside Ex1 of the housing 10. After removing the first member 40 from the casing 10, a new first member 40 can be attached and fixed to the casing 10, as illustrated in FIG.
  • the first member 40 can be replaced while the optical system 30 is fixed in the internal space 10is of the housing 10.
  • the wavelength converter 422 can be replaced while the optical system 30 is fixed in the internal space 10is of the housing 10.
  • the wavelength conversion section 422 can be replaced without removing the optical system 30 from the illumination device 1. Therefore, it is possible to extend the life of the lighting device 1 and to make it easier to handle.
  • the new first member 40 after replacement may be the first member 40 in which the entire first member 40 that was removed from the housing 10 has been replaced, or the new first member 40 that has been removed from the housing 10.
  • the first member 40 may be one in which the phosphor substrate 42 of the first member 40 is replaced.
  • the lens optical system 32 may be an imaging optical system that forms the image of the wavelength converter 422 on the virtual image plane IS1.
  • this imaging optical system is composed of a first lens 321a, a second lens 321b, and a third lens 321c.
  • the wavelength converter 422 may have a conjugate relationship with the image plane IS1.
  • the conjugate relationship here does not have a strict meaning, but the part where the fluorescence L1 is most concentrated (the size of the cross section perpendicular to the second optical axis Ax2 of the fluorescence L1 on the third aperture 50a side of the wavelength conversion unit 422) The area with the smallest contrast) can be regarded as the image plane IS1.
  • the image plane IS1 may be located at the third aperture 50a, for example.
  • the image surface IS1 may be a flat surface or a curved surface.
  • the fluorescence L1 is focused on the image plane IS1 and is emitted into the illumination space S1 through the third aperture 50a.
  • the image plane IS1 does not need to be located inside the third aperture 50a.
  • the image plane IS1 may be located at the boundary between the internal space of the third opening 50a and the internal space 10is of the housing 10, as shown in FIG.
  • the image plane IS1 may be located at a location slightly shifted toward the internal space 10is of the housing 10 from this boundary.
  • the image plane IS1 may be located at the boundary between the internal space of the third opening 50a and the illumination space S1, or may be located at a location slightly shifted from this boundary toward the illumination space S1.
  • the size of the fluorescence L1 on the surface of the wavelength conversion unit 422 is set as a first size
  • the size of the fluorescence L1 on the image plane IS1 is set as a second size
  • the size of the third aperture 50a is set as a third size.
  • the imaging magnification of the lens optical system 32 may be set to a value equal to or less than the value obtained by dividing the third size by the first size.
  • the first size may be, for example, the size of a region of the surface of the wavelength conversion unit 422 on the lens optical system 32 side that is irradiated with the excitation light L0.
  • the third size may be the minimum value of the opening area of the third aperture 50a when viewed along the optical axis direction.
  • the imaging magnification may be a value obtained by dividing the second size by the first size.
  • the size of the fluorescence L1 may be defined by a contour line having a light amount e 1/2 of the peak value in the light amount distribution of the fluorescence L1 in a cross section perpendicular to the second optical axis Ax2.
  • e is called Napier's number.
  • the light rays at both outer edges of the fluorescent light L1 shown in FIG. 3 may be light rays having a light amount e half of the peak value of the light amount distribution in the cross section perpendicular to the second optical axis Ax2 .
  • Light in a region outside the region surrounded by the above contour lines that is, the light rays at both outer edges
  • the size of the fluorescence L1 (second size) on the image plane IS1 is set to the size of the third aperture 50a ( (3rd size) or less. Therefore, it is possible to reduce the possibility that the fluorescent light L1 will enter the peripheral portion of the third opening 50a of the housing 10. Thereby, unnecessary reflected and scattered light leaking from the third opening 50a can be reduced.
  • the imaging magnification of the lens optical system 32 may be set to a value such that the size of the fluorescence L1 passing through the third aperture 50a is smaller than that of the third aperture 50a. Thereby, reflected and scattered light can be further reduced.
  • the spread angle of the fluorescence L1 from the wavelength conversion unit 422 toward the first lens 321a is defined as a first spread angle
  • the spread angle of the fluorescence L1 in the illumination space S1 is defined as a second spread angle
  • an example of the second spread angle ⁇ 2 is indicated by a thin arc-shaped arrow.
  • the first spread angle can be considered as the spread angle of the fluorescence L1 immediately before the lens optical system 32
  • the second spread angle ⁇ 2 can be considered as the spread angle of the fluorescence L1 immediately after the image plane IS1.
  • the lens optical system 32 may be designed under the condition that the second divergence angle ⁇ 2 is smaller than the first divergence angle.
  • the orientation angle (eg, half-value angle) of the fluorescence L1 in the illumination space S1 is about 60 degrees or less.
  • the orientation angle of the lighting device 1 may be, for example, less than 45 degrees, less than 30 degrees, or less than 15 degrees.
  • the lighting device 1 may further include one or more heat radiating members 70.
  • FIG. 8 is a front view schematically showing an example of the appearance of the lighting device 1 according to the second embodiment.
  • An example of the lighting device 1 according to the second embodiment shown in FIG. 8 is based on the lighting device 1 according to the first embodiment, and further includes one or more heat radiating members 70.
  • the heat dissipation member 70 is a member that increases the dissipation of heat from the lighting device 1 to the external space.
  • a metal material with high thermal conductivity such as Cu, Al, Mg, Au, Ag, Fe, Cr, Co, Be, Mo, W, or an alloy is applied.
  • the one or more heat radiating members 70 include, for example, a first heat radiating member 70a and a second heat radiating member 70b.
  • Each of the one or more heat dissipating members 70 has a plurality of protrusions 72.
  • Each of the plurality of protrusions 72 may be a thin plate-like fin or an elongated rod-like pin. The presence of the plurality of protrusions 72 can increase heat dissipation from the heat dissipation member 70 to the external space.
  • Each of the one or more heat dissipating members 70 may include a plate-shaped base 71 and a plurality of protrusions 72 that are respectively positioned to protrude from the base 71. In the example of FIG.
  • the first heat dissipation member 70a includes a plate-shaped first base 71a and a plurality of first protrusions 72a that are respectively positioned and protruding from the first base 71a.
  • the second heat dissipation member 70b includes a plate-shaped second base 71b and a plurality of second protrusions 72b that are respectively positioned and protruded from the second base 71b.
  • the first heat radiating member 70a may be fixed to the base portion 41 of the first member 40, heat is radiated from the wavelength conversion unit 422 via the base portion 41 etc. by the first heat radiating member 70a.
  • Speed can be increased. This can reduce the extent to which the wavelength converter 422 deteriorates due to heat.
  • the first heat radiating member 70a may be in contact with the base portion 41.
  • the first heat radiating member 70a and the base portion 41 may sandwich one or more members.
  • a plate-like member may be applied to the one or more members.
  • the material of one or more members may be, for example, a metal material with high thermal conductivity such as Cu, Al, Mg, Au, Ag, Fe, Cr, Co, Be, Mo, W, or an alloy. .
  • the first heat radiating member 70a is fixed to the base part 41 in a state where it can be removed from the base part 41, after removing the first member 40 from the casing 10, When attaching and fixing a new first member 40 to 10, it is possible to easily reuse the first heat dissipating member 70a.
  • the first base portion 71a is in contact with a surface (also referred to as a fifth surface) 411u of the main body portion 411 of the base portion 41 that is opposite to the first surface 411b.
  • the first heat radiating member 70a may be fixed to the base portion 41.
  • the first base portion 71a may be fastened to the base portion 41 by fitting the male screw member Sw2 inserted into the through hole Th2 of the first base portion 71a into the screw hole Sh2 of the base portion 41. More specifically, the first base portion 71a may be fastened to the base portion 41 by a plurality of sets of the through hole Th2, the male screw member Sw2, and the screw hole Sh2.
  • FIG. 1 the example of FIG.
  • the first base portion 71a has three through holes Th2 each penetrating in the -Z direction as the first direction.
  • the main body part 411 of the base part 41 has three screw holes Sh2 each recessed in the -Z direction as the first direction on the fifth surface 411u side as the plurality of screw holes Sh2.
  • FIG. 9 is a diagram schematically showing an example of how one or more heat radiating members 70 are removed from the lighting device 1 according to the second embodiment.
  • the first heat radiating member 70a can be removed from the base portion 41 by pulling out the plurality of male screw members Sw2 from the plurality of screw holes Sh2.
  • hidden lines depicting examples of the outer edges of some configurations are schematically shown as thin broken lines.
  • the second heat radiating member 70b increases the speed at which heat is dissipated from the light source 20 via the mounting member 200. can be done. This can reduce the degree to which the light source 20 is degraded by heat.
  • the second heat dissipation member 70b is fixed to the mounting member 200 in a state where it can be removed from the mounting member 200, after the mounting member 200 is removed from the casing 10, When attaching and fixing a new attachment member 200 to, the second heat radiating member 70b can be easily reused.
  • the second heat radiation The member 70b may be fixed to the attachment member 200.
  • the second base 71b may be fastened to the mounting member 200 by fitting the male screw member Sw3 inserted into the through hole Th3 of the second base 71b into the screw hole Sh3 of the mounting member 200.
  • the second base portion 71b may be fastened to the mounting member 200 by a plurality of sets of the through hole Th3, the male screw member Sw3, and the screw hole Sh3.
  • the second base portion 71b has three through holes Th3 each penetrating in the ⁇ X direction as the second direction.
  • the first holding portion 21 of the mounting member 200 has three screw holes Sh3, each recessed in the -X direction as the second direction, on the opposite side from the housing 10, as a plurality of screw holes Sh3.
  • the second heat radiating member 70b can be removed from the mounting member 200 by pulling out the plurality of male screw members Sw3 from the plurality of screw holes Sh3.
  • the lighting device 1 may include either one of the first heat radiating member 70a and the second heat radiating member 70b, or both of the first heat radiating member 70a and the second heat radiating member 70b. may be provided.
  • the first heat radiating member 70a may be directly fixed to the housing 10.
  • the base portion 41 may be fixed to the housing 10 by being held between the first heat radiating member 70a and the housing 10.
  • the first heat radiating member 70a may be fixed to the housing 10 in a removable state.
  • the first heat radiating member 70a may be fixed to the base part 41 in a state where it can be removed from the base part 41.
  • the fixation of the first heat dissipating member 70a to the housing 10 may be realized by various methods such as fastening and adhesion.
  • the fastening may be realized, for example, by fitting a male thread member into a screw hole having a female thread on the inner peripheral surface.
  • Adhesion may be achieved using, for example, an adhesive with low adhesive strength.
  • This adhesive may be realized using, for example, a curable adhesive resin such as an epoxy resin or a silicone resin.
  • the first heat radiating member 70a may have a structure including a third predetermined portion directly fixed to the housing 10, for example.
  • One or more protrusions and/or one or more flanges, etc. may be applied to the third predetermined portion.
  • the base portion 41 may include, for example, a fourth predetermined portion having a shape in which various members and/or portions for directly fixing the first heat dissipating member 70a to the housing 10 can be arranged. For example, a portion having a through hole and/or a notch-like portion may be applied to the fourth predetermined portion.
  • FIG. 10 is a front view schematically showing the appearance of another example of the lighting device 1 according to the second embodiment.
  • the base portion 41 may include a plurality of protrusions (also referred to as third protrusions) 73a.
  • each of the plurality of third protrusions 73a may be a thin plate-like fin, or may be an elongated rod-like pin.
  • the plurality of third protrusions 73a can function as a heat radiating part that increases the speed of dissipating heat from the base part 41 to the external space. Thereby, the speed at which heat is dissipated from the wavelength conversion section 422 can be increased.
  • each of the plurality of third protrusions 73a protrudes from the fifth surface 411u of the main body portion 411 of the base portion 41 toward the side opposite to the housing 10.
  • the speed at which heat is dissipated from the wavelength conversion unit 422 can be increased with a simple configuration. As a result, the life of the lighting device 1 can be easily extended.
  • the mounting member 200 may include a plurality of protrusions (also referred to as fourth protrusions) 73b.
  • the first holding part 21 may include a plurality of fourth protrusions 73b.
  • each of the plurality of fourth protrusions 73b may be a thin plate-like fin or an elongated rod-like pin.
  • the plurality of fourth protrusions 73b can function as a heat dissipation section that increases the speed at which heat dissipates from the first holding section 21 to the external space. This allows the speed at which heat is dissipated from the light source 20 to be increased. As a result, the degree to which the light source 20 deteriorates due to heat can be reduced.
  • the plurality of fourth protrusions 73b are in a state of protruding from the surface of the first holding part 21 on the opposite side to the housing 10.
  • the speed at which heat is dissipated from the light source 20 can be increased with a simple configuration.
  • the life of the lighting device 1 can be easily extended.
  • the base portion 41 is rotated at two or more angles around the virtual rotation axis Ax3 passing through the second opening 10b. It may have a structure that can be fixed to the housing 10 in a state where it can be removed to the outside Ex1. In other words, when the base part 41 is released from being fixed to the housing 10, it rotates to the outside Ex1 at two or more angles around the virtual rotation axis Ax3 passing through the second opening 10b. It may have a structure that allows it to be fixed to the housing 10 in a removable state.
  • the center P0 of the area A0 of the wavelength converter 422 that is irradiated with the excitation light L0 may be located at a location shifted from the virtual rotation axis Ax3.
  • the area A0 may be circular or may have another shape such as an ellipse. If the area A0 is circular or elliptical, the center P0 may be the center point of the area A0. If the area A0 has another shape, the center P0 may be the center of gravity of the area A0.
  • the base part 41 is rotated about the virtual rotation axis Ax3, and then the base part 41 is fixed to the housing 10. can do. Thereby, the area A0 that is irradiated with the excitation light L0 in the wavelength converter 422 can be changed. As a result, deterioration of the wavelength converter 422 can be reduced. Therefore, the life of the lighting device 1 can be extended.
  • FIG. 11 is a plan view schematically showing the appearance of an example of the lighting device 1 according to the third embodiment.
  • FIG. 12 is a sectional view schematically showing the first member 40 and the vicinity of the first member 40 in a cross section of an example of the lighting device 1 according to the third embodiment.
  • FIG. 13 is a bottom view schematically showing an example of the configuration of the first member 40 of the lighting device 1 according to the third embodiment.
  • FIG. 14 is a diagram schematically showing an example of how the base portion 41 is released from being fixed to the housing 10 in the lighting device 1 according to the third embodiment.
  • examples of each of the second optical axis Ax2 and the virtual rotation axis Ax3 are indicated by black circles.
  • FIG. 11 and 13 examples of each of the second optical axis Ax2 and the virtual rotation axis Ax3 are indicated by black circles.
  • an example of each of the second optical axis Ax2 and the virtual rotation axis Ax3 is shown by a thin dashed line
  • an example of the outer edge of the excitation light L0 is schematically shown by a thin broken line
  • the fluorescence L1 An example of the outer edge of is schematically shown by a thin two-dot chain line.
  • an example of the outer edge of the area A0 of the wavelength converter 422 that is irradiated with the excitation light L0 is indicated by a circle drawn with a broken line.
  • FIGS. 11 to 14 An example of the lighting device 1 according to the third embodiment shown in FIGS. 11 to 14 is based on the lighting device 1 according to the first embodiment, but the position of the first member 40 is perpendicular to the second optical axis Ax2. It has a configuration shifted in the direction.
  • the portion of the second opening 10b on the first member 40 side and the position of the first member 40 are set perpendicular to the second optical axis Ax2. It has a configuration in which it is translated in parallel in the ⁇ X direction, which is one direction.
  • the base portion 41 is fixed to the housing 10 by removing the plurality of male screw members Sw1 from the plurality of screw holes Sh1 and the plurality of through holes Th1. may be canceled.
  • the plurality of through holes Th1 are located at a plurality of locations around a virtual rotation axis Ax3 that is shifted from the second optical axis Ax2 in the ⁇ X direction. These multiple locations include the first location where one through hole Th1 is located, and rotation by a first predetermined angle ⁇ 0 around the virtual rotation axis Ax3 based on this first location. and two or more of the above locations.
  • the plurality of screw holes Sh1 are located at a plurality of locations around the virtual rotation axis Ax3. These multiple locations include the first location where one screw hole Sh1 is located, and rotation by a first predetermined angle ⁇ 0 around the virtual rotation axis Ax3 based on this first location.
  • FIGS. 11 and 13 an example of the first predetermined angle ⁇ 0 is indicated by a thin arc-shaped arrow. More specifically, for example, when the first predetermined angle ⁇ 0 is 120 degrees, three through holes Th1 may be located at three locations around the virtual rotation axis Ax3. These three locations are the first location where one through hole Th1 is located, and the second location that is rotated 120 degrees around the virtual rotation axis Ax3 based on this first location. including one location. Furthermore, three screw holes Sh1 may be located at three locations around the virtual rotation axis Ax3. These three locations are the first location where one screw hole Sh1 is located, and the second location that is rotated 120 degrees around the virtual rotation axis Ax3 based on this first location. including one location.
  • the virtual rotation axis Ax3 passes through the center of the portion of the second opening 10b into which the convex portion 412 is fitted.
  • the cross-sectional shape of the portion of the second opening 10b into which the convex portion 412 is fitted is a circular shape centered on the virtual rotation axis Ax3, and the shape of the convex portion 412 is centered on the virtual rotation axis Ax3. Assume that the shape is cylindrical. In this case, if the fixation of the base part 41 to the housing 10 is released, the base part 41 can be rotated, for example, while the convex part 412 is fitted into the second opening 10b.
  • the base part 41 is attached to the housing 10.
  • the base portion 41 can be fixed to the housing 10 at two or more different angles rotated about the virtual rotation axis Ax3. For example, when the first predetermined angle ⁇ 0 mentioned above is 120 degrees, there are three combinations of the three screw holes Sh1 and the three through holes Th1. Therefore, the base portion 41 can be fixed to the housing 10 at three different angles rotated about the virtual rotation axis Ax3.
  • the first predetermined angle ⁇ 0 may be an arbitrary number obtained by dividing 360 degrees by a natural number of 2 or more.
  • the number of each of the plurality of screw holes Sh1 and the plurality of through holes Th1 is not limited to three, but may be any natural number of two or more.
  • the base part 41 can be removably fixed to the housing 10 at two or more angles rotated around the virtual rotation axis Ax3 passing through the second opening 10b.
  • Possible structures of the base part 41 can be realized.
  • the base part 41 is rotated by an angle n times the first predetermined angle ⁇ 0 (n is a natural number) about the virtual rotation axis Ax3.
  • the base portion 41 can be fixed to the housing 10.
  • the area A0 that is irradiated with the excitation light L0 in the wavelength converter 422 can be changed.
  • deterioration of the wavelength converter 422 can be reduced. Therefore, the life of the lighting device 1 can be extended.
  • the virtual rotation axis Ax3 does not need to intersect the area A0.
  • the region A0 to which the excitation light L0 is irradiated in the wavelength conversion portion 422 is changed from the first region to a region that overlaps with the first region.
  • a design that can be changed to a second area where the area of interest is not present may be realized.
  • the distance D0 between the second optical axis Ax2 and the virtual axis of rotation Ax3 may be larger than half the diameter R0 of the area A0.
  • the distance D0 may be a distance by which the virtual rotation axis Ax3 is offset from the second optical axis Ax2 in a direction perpendicular to the second optical axis Ax2.
  • the distance D0 is the distance by which the virtual rotation axis Ax3 is offset from the second optical axis Ax2 in the -X direction as the second direction.
  • the position of the virtual rotation axis Ax3 is not limited to a position offset from the second optical axis Ax2 in the -X direction, but may be a position offset from the second optical axis Ax2 in any direction perpendicular to the second optical axis Ax2. There may be.
  • the virtual rotation axis Ax3 may not be parallel to the second optical axis Ax2, but may be slightly inclined with respect to the second optical axis Ax2.
  • the wavelength separation filter 31 and the first aperture 10a are arranged in this order in the first direction, and the light source 20, the wavelength separation filter 31, and the wavelength conversion section 422 may be arranged in the order described in the second direction intersecting the first direction.
  • the wavelength separation filter 31 may transmit the excitation light L0 from the light source 20 toward the wavelength conversion section 422, and may reflect the fluorescence L1 from the wavelength conversion section 422 toward the first opening 10a. If this configuration is adopted, the size of the lighting device 1 in the first direction can be reduced.
  • FIG. 15 is a cross-sectional view schematically showing an example of the configuration of the lighting device 1 according to the fourth embodiment.
  • An example of the lighting device 1 according to the fourth embodiment shown in FIG. 15 is based on the lighting device 1 according to the first embodiment described above shown in FIG. 3.
  • An example of the lighting device 1 according to the fourth embodiment is such that the shape of the casing 10 is changed from an I-shape to an L-shape, and one or more lenses 321 in the optical system 30 are arranged in an internal space 10is of the casing 10. and a configuration in which the arrangement of the wavelength separation filter 31 and one or more holding members 61 of the holding mechanism 60 is changed.
  • an object having a cylindrical shape bent in an L shape (also referred to as an L-shaped cylindrical body) is applied to the casing 10.
  • the cylindrical portion 11 of the housing 10 has a hollow space extending along the -X direction as the second direction and a hollow space extending along the -Z direction as the first direction. It has a shape in which a portion having a hollow space passing therethrough is connected. In other words, the cylindrical portion 11 has an L-shaped bent longitudinal direction.
  • the cylindrical portion 11 has a first end E1 and a second end E2 at both ends in the longitudinal direction. More specifically, the first end E1 is located at the end of the cylindrical portion 11 on the ⁇ Z direction side, which is the first direction.
  • the second end portion E2 is located at the end of the cylindrical portion 11 on the ⁇ X direction side as the second direction.
  • the first opening 10a opens in the -Z direction as the first direction at the end of the housing 10 in the -Z direction as the first direction.
  • the second opening 10b is a hole penetrating the first portion 12 that projects inward from the second end E2 of the cylindrical portion 11 in the -X direction as the second direction.
  • the second opening 10b opens in the -X direction as the second direction at the end of the casing 10 in the -X direction as the second direction.
  • the wavelength separation filter 31 is located between the light source 20 and the wavelength conversion section 422.
  • the light source 20, the wavelength separation filter 31, and the wavelength converter 422 are arranged in the order described in the -X direction as the second direction.
  • the wavelength separation filter 31 for example, by appropriately setting the thickness of the plurality of dielectric thin films constituting the dielectric multilayer film 312, the excitation light L0 in the dielectric multilayer film 312 can be transmitted and the fluorescence L1 can be transmitted through the wavelength separation filter 31.
  • the first lens 321a and the second lens 321b are located between the wavelength conversion section 422 and the wavelength separation filter 31.
  • the wavelength separation filter 31, the second lens 321b, the first lens 321a, and the wavelength converter 422 are arranged in this order in the -X direction as the second direction.
  • the third lens 321c is located between the wavelength separation filter 31 and the first aperture 10a.
  • the wavelength separation filter 31, the third lens 321c, and the first aperture 10a are arranged in this order in the -Z direction as the first direction.
  • one or more holding members 61 of the holding mechanism 60 include a fifth holding member 61a, a second holding member 61b, a third holding member 61c, and a fourth holding member 61d. 61e included.
  • the outer peripheral portion of the first lens 321a is held between the first portion 12 and the first holding member 61a in the ⁇ X direction as the second direction.
  • the outer peripheral portion of the second lens 321b is held between the first holding member 61a and the fifth holding member 61e in the -X direction as the second direction.
  • the second holding member 61b is located between the fifth holding member 61e and the wavelength separation filter 31.
  • the third holding member 61c is sandwiched between the wavelength separation filter 31 and a portion of the inner surface 10if of the casing 10 facing the -X direction as the second direction.
  • the outer peripheral portion of the third lens 321c is held between the second holding member 61b and the fourth holding member 61d in the ⁇ Z direction as the first direction.
  • the second member 50 fixed to the housing 10 from the first opening 10a side is in a state where the optical system 30 is sandwiched between the second member 50 and the inner surface 10if of the housing 10. In other words, the optical system 30 is sandwiched between the second member 50 and the inner surface 10if of the housing 10.
  • the wavelength separation filter 31 and the third lens 321c of the optical system 30 are connected to a portion of the inner surface 10if of the housing 10 that faces the -Z direction as the first direction, and a portion of the second member that faces the -Z direction as the first direction. It is sandwiched between 50 and 50.
  • the base portion 41 is in a state covering the second end portion E2, the first portion 12, and the second opening 10b toward the +X direction opposite to the ⁇ X direction as the second direction. positioned.
  • the base portion 41 is fixed to the casing 10 in such a manner that it can be removed from the second end E2 side of the casing 10 in the -X direction as the second direction.
  • the first lens 321a, the first holding member 61a, the second lens 321b, the fifth holding member 61e, the third holding member 61c, the wavelength separation filter 31, the second The holding member 61b, the third lens 321c, and the fourth holding member 61d can be inserted into the internal space 10is of the housing 10 through the first opening 10a in this order.
  • the optical system 30 can be sandwiched between the second member 50 and the inner surface 10if of the housing 10. Through this step, the optical system 30 can be easily fixed in the internal space 10is of the housing 10.
  • the base portion 41 to which the wavelength conversion unit 422 is fixed can be removed from the housing 10 while the optical system 30 is fixed in the internal space 10is of the housing 10.
  • the first member 40 including the wavelength conversion section 422 can be removed from the housing 10 toward the outside Ex1.
  • a new first member 40 can be attached and fixed to the housing 10. Therefore, the first member 40 can be replaced while the optical system 30 is fixed in the internal space 10is of the housing 10.
  • the wavelength converter 422 can be replaced while the optical system 30 is fixed in the internal space 10is of the housing 10.
  • the wavelength conversion section 422 can be replaced without removing the optical system 30 from the illumination device 1. Therefore, it is possible to extend the life of the lighting device 1 and make it easier to handle.
  • the lighting device 1 is located between the second surface 12u of the first portion 12 on the external Ex1 side and the base portion 41.
  • An annular member (also referred to as an annular spacer) 80 may be provided.
  • the annular spacer 80 may be held between the second surface 12u of the first portion 12 of the housing 10 and the base portion 41. More specifically, the annular spacer 80 may be held between the second surface 12u and the main body portion 411 of the base portion 41.
  • the housing 10 and the base portion 41 can be separated from each other in the direction in which the second opening 10b opens in the first portion 12 due to the presence of the annular spacer 80. Therefore, even if the thickness of the wavelength conversion section 422 varies during manufacturing, by using the annular spacer 80 having a thickness corresponding to the thickness of the wavelength conversion section 422, the thickness of the wavelength conversion section 422 can be reduced.
  • the surface exposed to the internal space 10is can be easily aligned.
  • FIG. 16 is a front view schematically showing the appearance of a lighting device 1 according to another first example.
  • FIG. 17 is a sectional view schematically showing an example of a cross section of the illumination device 1 according to another first example at a position corresponding to line III-III in FIG. 2.
  • a lighting device 1 according to another first example shown in FIGS. 16 and 17 is based on the lighting device 1 according to the first embodiment, and further includes an annular spacer 80.
  • the annular spacer 80 has a plate-like shape and has a hole 80h passing through the annular spacer 80.
  • FIGS. 16 the annular spacer 80 has a plate-like shape and has a hole 80h passing through the annular spacer 80.
  • the annular spacer 80 may be a thin member having a thickness smaller than each of the first portion 12 and the main body portion 411 of the base portion 41 .
  • the thickness direction of the annular spacer 80 is along the direction in which the first portion 12 of the housing 10 and the main body portion 411 of the base portion 41 are separated.
  • the hole 80h passes through the annular spacer 80 along the direction in which the first portion 12 of the housing 10 and the main body portion 411 of the base portion 41 are apart.
  • the convex portion 412 of the base portion 41 may be fitted into the hole 80h or may be inserted through the hole 80h.
  • the annular spacer 80 is located not only between the second surface 12u of the first portion 12 on the external Ex1 side and the base portion 41, but also between the second end E2 of the housing 10 and the base portion 41. You can leave it there.
  • the annular spacer 80 may have a shape that does not conflict with the male threaded member Sw1, such as having a plurality of through holes through which the male threaded member Sw1 is inserted.
  • the annular spacer 80 may have an annular shape when viewed from above, or may have an angular annular shape, or may have a circumferential shape centered around the hole 80h. It may have a C-shape in which the parts are not connected.
  • the lighting device 1 is configured to move the housing in the direction in which the second opening 10b opens in the first portion 12 by the screwing amount of the plurality of male screw members Sw1 into the plurality of screw holes Sh1. It may have a configuration in which the distance between the body 10 and the base portion 41 can be adjusted.
  • the lighting device 1 instead of including the annular spacer 80, includes a female screw portion on the inner peripheral surface of each of the plurality of through holes Th1 in the base portion 41, into which the male screw member Sw1 is fitted. Good too.
  • the second opening 10b is opened in the first portion 12 by adjusting the screwing amount of the plurality of male screw members Sw1 into the plurality of through holes Th1 and the plurality of screw holes Sh1, each having a female thread portion.
  • the housing 10 and the base portion 41 may be separated from each other as appropriate in the direction shown in FIG. With this configuration as well, even if the thickness of the wavelength conversion section 422 varies during manufacturing, the surface of the wavelength conversion section 422 exposed to the internal space 10is can be aligned.
  • the second member 50 is in a state where the optical system 30 is sandwiched between it and the inner surface 10if of the housing 10, and is fixed to the housing 10 from the first opening 10a side.
  • FIG. 18 is a sectional view schematically showing an example of a cross section of the illumination device 1 according to another second example at a position corresponding to line III-III in FIG. 2.
  • a lighting device 1 according to another second example shown in FIG. 18 is based on the lighting device 1 according to the first embodiment.
  • one or more of the holding members 61 does not include the fourth holding member 61d, and the second member 50 is replaced with the third holding member 61c instead of the fourth holding member 61d. It also has a structure that functions as a lens holder that holds the third lens 321c.
  • the protrusion 52 of the second member 50 has a cylindrical shape surrounding the second optical axis Ax2.
  • the inner peripheral surface of the second member 50 is located closer to the second optical axis Ax2 than the outer peripheral surface of the third lens 321c.
  • the peripheral edge of the third lens 321c is held between the third holding member 61c and the protrusion 52 of the second member 50 in the optical axis direction.
  • the edge of the third holding member 61c on the third lens 321c side is in contact with the peripheral edge of the surface of the third lens 321c on the wavelength separation filter 31 side, and the protrusion of the second member 50
  • the edge portion of the lens 52 on the third lens 321c side is in contact with the peripheral edge portion of the surface of the third lens 321c on the first opening 10a side.
  • the plate-like portion 51 of the second member 50 is located in the internal space 10is of the casing.
  • Either or both of the plate-shaped portion 51 and the protruding portion 52 may have an outer peripheral surface fixed to the cylindrical portion 11 of the housing 10 .
  • the outer periphery of one or both of the plate-shaped portion 51 and the protruding portion 52 is fitted into a female threaded portion located on the inner periphery of the cylindrical portion 11 on the first end E1 side. It may have a male threaded portion.
  • Either or both of the plate-like part 51 and the protruding part 52 may be fixed to the cylindrical part 11 by, for example, adhesion, bonding, or fitting.
  • the optical system 30 is sandwiched between the second member 50 and the inner surface 10if of the housing 10.
  • the optical system 30 is sandwiched between the first portion 12 of the housing 10 and the second member 50. More specifically, the optical system 30 and the holding mechanism 60 are sandwiched between the first portion 12 of the housing 10 and the plate-shaped portion 51 of the second member 50.
  • the plate-shaped portion 51 of the second member 50 may be located closer to the wavelength separation filter 31 than the first opening 10a, or may be located at the first opening 10a.
  • the fluorescence L1 may pass through the first opening 10a of the casing 10 after passing through the third opening 50a of the second member 50, or the fluorescence L1 may pass through the first opening 10a of the casing 10 while passing through the third opening 50a of the second member 50. It may also pass through the third opening 50a.
  • FIG. 19 is a sectional view schematically showing an example of a cross section of the illumination device 1 according to another third example at a position corresponding to line III-III in FIG. 2.
  • the lighting device 1 according to another third example shown in FIG. The first portion 12 has a reduced thickness.
  • the first member 40 can be replaced while the optical system 30 is fixed in the internal space 10is of the housing 10, as in each of the above embodiments.
  • the wavelength converter 422 can be replaced while the optical system 30 is fixed in the internal space 10is of the housing 10.
  • the wavelength conversion section 422 can be replaced without removing the optical system 30 from the illumination device 1. Therefore, it is possible to extend the life of the lighting device 1 and make it easier to handle.
  • the casing 10 and the base part 41 are in a state where the base part 41 is fixed to the casing 10 in a state where it can be removed to the external Ex1 side of the casing 10.
  • a mechanism (also referred to as an attachment mechanism) 90 may be included.
  • the base portion 41 can be easily removed and attached to the housing 10.
  • the wavelength conversion section 422 can be easily replaced without removing the optical system 30 from the illumination device 1.
  • the attachment mechanism 90 includes one or more second parts of the base part 41 being hooked to one or more first parts of the casing 10, thereby attaching the casing.
  • a mechanism is employed in which the base portion 41 is fixed to the casing 10 in a state where it can be removed to the outside Ex1 side of the body 10.
  • FIG. 20 is a sectional view schematically showing the configuration of an example of the attachment mechanism 90 in the lighting device 1 according to another fourth example.
  • FIG. 21 is a cross-sectional view schematically showing an example of a state in which the first member 40 is being removed from the housing 10 in the lighting device 1 having the attachment mechanism 90 according to the example.
  • FIG. 22 is a cross-sectional view schematically showing an example of the lighting device 1 having the attachment mechanism 90 according to the example, with the first member 40 removed from the housing 10.
  • the housing 10 has one or more convex portions 91, for example, as one or more first portions of the attachment mechanism 90.
  • the base portion 41 has a plurality of elastic portions 92, for example, as one or more second portions of the attachment mechanism 90.
  • two convex portions 91 and two elastic portions 92 are schematically depicted as one specific example.
  • One or more convex portions 91 are located on the outer peripheral portion 11o of the cylindrical portion 11.
  • One or more convex portions 91 can be realized by providing one or more of a concave portion, a convex portion, and a step portion in the outer peripheral portion 11o of the cylindrical portion 11.
  • the one or more convex portions 91 may be a plurality of convex portions 91 located at different locations in the circumferential direction of the outer peripheral portion 11o of the cylindrical portion 11, or the one or more convex portions 91 may be It may be one annular convex part 91 located along the circumferential direction in the outer peripheral part 11o of.
  • Each of the plurality of elastic parts 92 includes, for example, a fixed part 921 fixed to the main body part 411 of the base part 41, and a protruding part 922 protruding from the main part 411 along the outer peripheral part 11o of the cylindrical part 11. ,including.
  • the fixed portion 921 may be fixed to the side surface 411s of the main body portion 411, for example.
  • the side surface 411s is located on the outer periphery of the main body portion 411, and may be a surface connecting the first surface 411b and the fifth surface 411u.
  • the plurality of fixed portions 921 are fixed, for example, at a plurality of different positions in the circumferential direction of the side surface 411s of the main body portion 411.
  • the protruding portion 922 may be, for example, a plate-shaped portion made of an elastic material and having a hook-shaped portion F1 protruding toward the cylindrical portion 11 at the tip.
  • the elastic material may be, for example, a metal material such as iron or stainless steel, or resin.
  • the plurality of elastic parts 92 may be constituted by one member together with the main body part 411 of the base part 41, or may be fixed to the main body part 411 by adhesion, bonding, fastening, fitting, or the like.
  • FIGS. 20 to 22 as an example of one or more convex portions 91, a first convex portion 91a and a second convex portion 91b located on the outer peripheral portion 11o of the cylindrical portion 11 are illustrated. There is. As an example of the plurality of elastic parts 92, a first elastic part 92a and a second elastic part 92b fixed to two different positions in the circumferential direction of the side surface 411s of the main body part 411 are depicted.
  • the first elastic portion 92a includes a first fixed portion 921a fixed to the main body portion 411, and a first protruding portion 922a protruding from the main body portion 411 along the outer peripheral portion 11o of the cylindrical portion 11.
  • the first protruding portion 922a is a plate-shaped portion made of an elastic material, and has a first hook-shaped portion F1a protruding toward the cylindrical portion 11 at its tip.
  • the second elastic portion 92b includes a second fixed portion 921b fixed to the main body portion 411, and a second protruding portion 922b protruding from the main body portion 411 along the outer peripheral portion 11o of the cylindrical portion 11.
  • the second protruding portion 922b is a plate-shaped portion made of an elastic material, and has a second hook-shaped portion F1b protruding toward the cylindrical portion 11 at the tip.
  • each of the hooked portions F1 of the plurality of elastic portions 92 is hooked on one or more convex portions 91, so that the external Ex1 of the casing 10
  • the base portion 41 is fixed to the housing 10 in a state where it can be removed to the side.
  • the first hooked portion F1a of the first elastic portion 92a is hooked on the first convex portion 91a
  • the second hooked portion F1b of the second elastic portion 92b is hooked on the second convex portion It is in a state where it is stuck in 91b.
  • the base portion 41 is fixed to the casing 10 in a state where it can be removed to the outside Ex1 side of the casing 10.
  • the protruding part 922 is elastically deformed to release the hooked part F1 from the convex part 91, and the first The member 40 may be in a state of being moved in a direction away from the first portion 12.
  • the first protruding portion 922a is elastically deformed to release the first hooked portion F1a from being caught on the first convex portion 91a
  • the second protruding portion 922b is elastically deformed to release the second hook-shaped portion F1b from being caught on the second convex portion 91b, while moving the first member 40 away from the first portion 12.
  • the state in which it is being moved is shown. Thereby, as shown in FIG. 22, the first member 40 including the base portion 41 can be removed from the housing 10.
  • the casing 10 can be Then, a new first member 40 can be attached and fixed.
  • the plurality of elastic parts 92 may be located at a plurality of locations around the virtual rotation axis Ax0 corresponding to the second optical axis Ax2 or the virtual rotation axis Ax3.
  • the plurality of locations include, for example, a first location where one elastic portion 92 is located, and rotation by a first predetermined angle ⁇ 0 around the virtual rotation axis Ax0 based on the first location. It may include two or more places you have visited.
  • the plurality of convex portions 91 may be located at a plurality of locations around the virtual rotation axis Ax0.
  • the plurality of locations include, for example, a first location where one convex portion 91 is located, and a rotation by a first predetermined angle ⁇ 0 around the virtual rotation axis Ax0 with this first location as a reference. and two or more places visited in sequence.
  • the three elastic parts 92 may be located at three locations around the virtual rotation axis Ax0. These three locations are the first location where one elastic part 92 is located, and the second location that is rotated by 120 degrees around the virtual rotation axis Ax0 based on this first location. including one location.
  • the three convex portions 91 may be located at three locations around the virtual rotation axis Ax0. These three locations include the first location where one convex portion 91 is located, and the location where the first location is rotated by 120 degrees around the virtual rotation axis Ax0 in order. Contains two locations.
  • the base part 41 will rotate around the virtual rotation axis Ax0 passing through the second opening 10b, as in the third embodiment. It may be removably fixed to the housing 10 at two or more angles. In other words, when the base portion 41 is released from being fixed to the casing 10, the casing 10 is rotated at two or more angles around the virtual rotation axis Ax0 passing through the second opening 10b.
  • the base part 41 may be removably fixed to the More specifically, for example, when the base part 41 is released from being fixed to the housing 10, the base part 41 is rotated at an angle that is n times the first predetermined angle ⁇ 0 (n is a natural number) about the virtual rotation axis Ax0. After rotation, the base portion 41 can be fixed to the housing 10. Thereby, the area A0 that is irradiated with the excitation light L0 in the wavelength converter 422 can be changed. As a result, deterioration of the wavelength converter 422 can be reduced. Therefore, the life of the lighting device 1 can be extended.
  • the housing 10 has a plurality of elastic parts each having a hook part at the tip as one or more first parts of the mounting mechanism 90, and the base part 41 is one of the first parts of the mounting mechanism 90.
  • the two or more second parts may include one or more convex parts on which the hook parts are hooked.
  • the base portion 41 has one or more convex portions, for example, a corner formed by the side surface 411s and the fifth surface 411u of the main body portion 411, or a protrusion, depression, or step on the side surface 411s. You can leave it there.
  • Each of the plurality of elastic parts includes, for example, a fixed part fixed to the outer peripheral part of the cylindrical part 11 and a protruding part that protrudes from the cylindrical part 11 along the side surface 411s of the main body part 411 of the base part 41. , and a hook portion may be present at the tip of each protruding portion.
  • FIG. 23 is a sectional view schematically showing the configuration of another example of the attachment mechanism 90 in the lighting device 1 according to another fourth example.
  • FIG. 24 is a cross-sectional view schematically showing an example of a state in which the first member 40 is being removed from the housing 10 in the lighting device 1 having the attachment mechanism 90 according to another example.
  • FIG. 25 is a cross-sectional view schematically showing an example of a state in which the first member 40 is removed from the housing 10 in the lighting device 1 having the attachment mechanism 90 according to another example.
  • the housing 10 has a plurality of ball plunger parts 93, for example, as one or more first parts of the attachment mechanism 90.
  • the base portion 41 has one or more hook portions 94 as one or more second portions of the attachment mechanism 90, for example.
  • two ball plunger portions 93 and two hook portions 94 are schematically depicted as one specific example.
  • the plurality of ball plunger parts 93 are located on the outer peripheral part 11o of the cylindrical part 11.
  • the ball plunger portion 93 is a positioning mechanism in which a portion of a sphere pushed by a spring within a cylindrical case protrudes outside the case.
  • the plurality of ball plunger parts 93 are located, for example, in a plurality of different positions in the circumferential direction of the outer peripheral part 11o of the cylindrical part 11.
  • One or more hook portions 94 protrude from the outer circumferential portion of the main body portion 411 of the base portion 41 along the outer circumferential portion 11o of the cylindrical portion 11.
  • the main body portion 411 and the one or more hook portions 94 may be composed of one member, or may have a configuration in which two or more members are connected by adhesion, joining, fastening, or fitting. Good too.
  • FIGS. 23 to 25 as an example of the plurality of ball plunger parts 93, a first ball plunger part 93a and a second ball plunger part 93b, which are respectively located on the outer peripheral part 11o of the cylindrical part 11, are depicted.
  • a first hook portion 94a and a second hook portion 94b are drawn, which respectively protrude from two different locations in the circumferential direction of the outer periphery of the main body portion 411 of the base portion 41. ing.
  • the base portion 41 is in a state fixed to the housing 10.
  • the first hook portion 94a is hooked on the sphere of the first ball plunger portion 93a
  • the second hook portion 94b is hooked on the sphere of the second ball plunger portion 93b.
  • the base portion 41 is fixed to the casing 10 in a state where it can be removed to the outside Ex1 side of the casing 10.
  • the hook part 94 is released from being hooked on the sphere, and the first member 40 is moved to the first part. It can be set as a state in which it is moved in a direction away from 12.
  • the first hook part 94a is released from being hooked on the sphere, and by compressing the spring in the second ball plunger part 93b, the first hook part 94a is released from the hooked state.
  • a state is shown in which the first member 40 is moved in the direction away from the first portion 12 while the two hook portions 94b are released from being hooked on the sphere.
  • the first member 40 including the base portion 41 can be removed from the housing 10.
  • the casing 10 can be Then, a new first member 40 can be attached and fixed.
  • the plurality of ball plunger parts 93 may be located at a plurality of locations around the virtual rotation axis Ax0 corresponding to the second optical axis Ax2 or the virtual rotation axis Ax3.
  • the plurality of locations include, for example, a first location where one ball plunger portion 93 is located, and a rotation by a first predetermined angle ⁇ 0 around the virtual rotation axis Ax0 with this first location as a reference. and two or more places visited in sequence.
  • the plurality of hook portions 94 may be located at a plurality of locations around the virtual rotation axis Ax0.
  • the plurality of locations include, for example, a first location where one hook portion 94 is located, and rotation by a first predetermined angle ⁇ 0 around the virtual rotation axis Ax0 based on the first location. It may include two or more places you have visited.
  • the three ball plunger parts 93 may be located at three locations around the virtual rotation axis Ax0. These three locations include the first location where one ball plunger portion 93 is located, and the location after rotating 120 degrees around the virtual rotation axis Ax0 based on this first location. Contains two locations.
  • the three hook portions 94 may be located at three locations around the virtual rotation axis Ax0. These three locations are the first location where one hook portion 94 is located, and the second location that is rotated by 120 degrees around the virtual rotation axis Ax0 based on this first location. including one location.
  • the base part 41 will rotate around the virtual rotation axis Ax0 passing through the second opening 10b, as in the third embodiment. It may be removably fixed to the housing 10 at two or more angles. In other words, when the base portion 41 is released from being fixed to the casing 10, the casing 10 is rotated at two or more angles around the virtual axis of rotation Ax0 passing through the second opening 10b.
  • the base part 41 may be removably fixed to the More specifically, for example, when the base part 41 is released from being fixed to the housing 10, the base part 41 is rotated at an angle that is n times the first predetermined angle ⁇ 0 (n is a natural number) about the virtual rotation axis Ax0. After rotation, the base portion 41 can be fixed to the housing 10. Thereby, the area A0 that is irradiated with the excitation light L0 in the wavelength converter 422 can be changed. As a result, deterioration of the wavelength converter 422 can be reduced. Therefore, the life of the lighting device 1 can be extended.
  • the base portion 41 may be fixed to the casing 10 in a removable state to the external Ex1 side of the casing 10 using various members or objects such as adhesives, for example. .
  • the first member 40 including the wavelength converter 422 can be removed from the housing 10 and the wavelength converter 422 can be replaced.
  • the adhesive may, for example, have low tackiness. Adhesives with low tack can be made using, for example, curable adhesive resins such as epoxy resins or silicone resins. Further, the adhesive may contain, for example, a thermally conductive filler.
  • an adhesive containing a thermally conductive filler is a base material made of a curable adhesive resin such as an epoxy resin or a silicone resin, and a large number of thermally conductive particles dispersed in this base material.
  • An adhesive material having the following properties can be considered.
  • the thermally conductive particles for example, one or more particles selected from silver particles, gold particles, aluminum nitride particles, and boron nitride particles can be applied.
  • the male threaded portion (also referred to as the first male threaded portion) of the base portion 41 fits into the female threaded portion (also referred to as the first female threaded portion) of the housing 10. (also referred to as the first configuration), or a configuration in which the male threaded portion (also referred to as the second male threaded portion) of the housing 10 is fitted into the female threaded portion (also referred to as the second female threaded portion) of the base portion 41 (also referred to as a second configuration), the base portion 41 may be fixed to the housing 10 in a removable state toward the external Ex1 side of the housing 10.
  • first configuration is a configuration in which the second opening 10b has a first female thread on the inner circumference, and the base portion 41 has a first male thread on the outer circumference of the convex portion 412. Conceivable.
  • the second opening 10b has, for example, a portion with a first inner diameter located on the inner space 10is side (also referred to as a first small diameter portion) and a portion with a first inner diameter located on the outside Ex1 side.
  • the first large diameter portion may also have a first female threaded portion at the inner circumference. .
  • the convex portion 412 includes, for example, a portion having a first outer diameter located on the wavelength conversion portion 422 side (also referred to as a second small diameter portion) and a first outer diameter portion located on the main body portion 411 side.
  • a portion having a second outer diameter larger than the diameter also referred to as a second large diameter portion
  • the second large diameter portion may have a first male threaded portion at the outer periphery.
  • the casing 10 has a second opening at the second end E2 in which the first female screw portion is located in the inner peripheral portion and is recessed in a direction away from the main body portion 411.
  • the base part 41 is a cylindrical cylinder having an annular groove part centered on the casing 10b, with a first male screw part located on the outer periphery thereof on the casing 10 side, and protruding from the main body part 411 toward the casing 10 side.
  • a configuration having a shaped portion may be adopted.
  • the casing 10 has a second male threaded portion at the outer circumferential portion (also referred to as the first outer circumferential portion) on the second end E2 side, and the base portion 41 has a second male screw portion at the inner circumferential portion (also referred to as the first outer circumferential portion).
  • the second female screw portion is located at the first inner circumferential portion) and has a cylindrical portion protruding from the main body portion 411 along the first outer circumferential portion of the housing 10 .
  • the casing 10 has a second opening 10b that is recessed in a direction away from the main body 411 and has a second male threaded portion located on the outer periphery at the second end E2.
  • the base part 41 is a cylindrical cylinder having an annular groove part centered on the body part 411 and having a second female screw part located on the inner peripheral part thereof on the housing 10 side and protruding from the main body part 411 toward the housing 10 side.
  • a configuration having a shaped portion may be adopted.
  • the one or more lenses 321 in the lens optical system 32 may include the first lens 321a and the second lens 321b and may not include the third lens 321c, or the first lens 321 may not include the third lens 321c. 321a and may not include the second lens 321b and the third lens 321c.
  • any one of a concave lens, a meniscus lens, and a convex lens may be applied to each of the one or more lenses 321 as appropriate.
  • each of the one or more lenses 321 may be either a spherical lens or an aspherical lens.
  • the inner wall of the housing 10 may have a protrusion or a recess for fixing one or more lenses 321.
  • the number of holding members 61 in the holding mechanism 60 may be reduced as appropriate.
  • one or more holding members 61 may have a function to reduce stray light.
  • the wavelength separation filter 31 is not limited to a dichroic mirror, and may be realized using other configurations such as a dichroic prism.
  • the wavelength conversion section 422 may be directly fixed to the base section 41 without intervening the second holding section 421.
  • the light source 20 may further include a light guide member such as a fiber and a rod lens in addition to the light emitting element.
  • the fiber includes a linear core and a cladding.
  • the cladding has a lower refractive index than the core and covers the core.
  • the excitation light L0 can be transmitted through the core while being totally reflected at the interface between the core and the cladding.
  • the rod lens has, for example, a columnar shape. The excitation light L0 can be transmitted through the inside of the rod lens while being totally reflected on the side surface of the rod lens.
  • the input ends of these light guide members correspond to the first end faces located at the longitudinal ends of the fibers or the first end faces located at the ends of the rod lenses
  • the output ends of the light guide members correspond to the first end faces located at the longitudinal ends of the fibers. This corresponds to a second end surface on the opposite side to the first end surface of the rod lens or a second end surface on the opposite side to the first end surface of the rod lens.
  • Excitation light L0 from the light emitting element enters the input end of the light guide member, travels within the light guide member, and exits from the output end of the light guide member.
  • the emission part 20e of the light source 20 corresponds to the emission end of the light guide member.
  • the light source 20 may emit excitation light L0 having linear polarization.
  • the polarization of the excitation light L0 may be, for example, s-polarized light with respect to the incident surface of the wavelength separation filter 31.
  • various lenses may be located between the light source 20 and the wavelength separation filter 31.
  • the first portion 12 may have light-absorbing properties.
  • Light-absorbing means a member having a light absorption rate of 60% or more in the visible light range.
  • the inner circumferential surface forming the second opening 10b of the first portion 12 may have light-absorbing properties.
  • the inner peripheral surface of the first portion 12 may have a high absorption rate for the fluorescence L1.
  • the absorption rate of the fluorescence L1 on the inner peripheral surface of the first portion 12 may be, for example, 60% or more, 80% or more, or 90% or more.
  • the inner circumferential surface of the first portion 12 may have a high absorption rate over the entire wavelength range of the fluorescence L1, or may have a high absorption rate at the peak wavelength of the fluorescence L1.
  • the absorption rate of the fluorescence L1 on the inner circumferential surface of the first portion 12 may be increased by blackening treatment or the like.
  • blackening treatment for example, blackening treatment by chemical conversion treatment, plating, painting, etc. can be employed.
  • blackening treatment either a matte blackening treatment or a glossy blackening treatment may be employed.
  • the absorption rate of the fluorescence L1 on the inner circumferential surface of the first portion 12 may be increased.
  • one or more of black metal, black metal oxide film, and black resin may be applied to the black material.
  • a dielectric multilayer film has, for example, a structure in which a plurality of dielectric thin films are stacked.
  • the dielectric material for example, one or more of SiO 2 , TiO 2 , niobium pentoxide (Nb 2 O 5 ), tantalum pentoxide (Ta 2 O 5 ), and magnesium fluoride (MgF 2 ) is employed. be done.
  • This dielectric multilayer film can also be called a low reflection film or an antireflection film.
  • the lighting device 1 has been described in detail as described above, the above description is an example in all aspects, and the lighting device 1 is not limited thereto. Numerous examples not illustrated may be envisioned without departing from the scope of this disclosure. The configurations described in each of the embodiments and various examples described above can be appropriately combined or omitted as long as they do not contradict each other.
  • This disclosure includes the following content.
  • the lighting device includes a casing having a first portion that has a first opening that opens to the outside, and a second opening that opens to the outside; a light source that emits excitation light; an optical system located in the internal space of the housing; and a light source that emits fluorescence having a wavelength spectrum different from that of the excitation light in response to irradiation of the excitation light from the light source.
  • a first member having a wavelength conversion unit and a base portion to which the wavelength conversion unit is fixed; and a second member having a third opening fixed to the housing from the first opening side and through which the fluorescent light passes.
  • the optical system includes: a wavelength separation filter that guides the excitation light from the light source to the wavelength conversion section and guides the fluorescence from the wavelength conversion section to the first aperture; a lens optical system including one or more lenses located on the optical path of the fluorescence leading to the first aperture, the base portion covering the second aperture from the outside side, and The optical system is fixed to the housing in a state where it can be removed to the outside, the wavelength conversion section is located in a state where it is exposed to the internal space, and the optical system It is sandwiched between the two members and the inner surface of the casing.
  • the lighting device of (1) or (2) above further includes a heat dissipation member that is fixed to the base in a removable manner and has a plurality of protrusions. It's okay.
  • the base portion may include a plurality of protrusions.
  • the casing and the base portion are fixed to the casing in a state where the base portion is removable to the outside.
  • the mounting mechanism may also include a mounting mechanism.
  • the base portion includes a convex portion that fits into the second opening from the outside, and the wavelength conversion portion includes the It may be fixed on the convex portion.
  • the base portion is rotated relative to the housing about a virtual rotation axis passing through the second opening.
  • the casing includes a cylindrical body, and the second opening is different from the first opening with the interior space in between.
  • the optical system may be located on the opposite side, and the optical system may be sandwiched between the first portion and the second member of the housing.
  • the wavelength conversion section, the wavelength separation filter, and the first aperture are arranged in a first direction, and the light source and the wavelength separation filter are arranged in the first direction.
  • the wavelength separation filters are arranged in a second intersecting direction, and the wavelength separation filters reflect the excitation light from the light source toward the wavelength conversion section and direct the fluorescence from the wavelength conversion section through the first opening. It may also be transmitted toward.
  • the wavelength separation filter and the first aperture are lined up in a first direction, and the light source, the wavelength separation filter, and the wavelength conversion parts are lined up in a second direction intersecting the first direction, and the wavelength separation filter transmits the excitation light from the light source toward the wavelength conversion part, and also transmits the excitation light from the wavelength conversion part.
  • the fluorescent light may be reflected toward the first aperture.
  • the lens optical system includes a first lens and a second lens, and is sandwiched between the first lens and the second lens. It may further include a spacer.
  • the lighting device according to any one of (1) to (11) above further includes an annular spacer located between the external surface of the first portion and the base portion. You can leave it there.
  • illumination device 10 housing 10a first aperture 10b second aperture 10if inner surface 10is internal space 12 first part 20 light source 30 optical system 31 wavelength separation filter 32 lens optical system 321 lens 321a first lens 321b second lens 321c third lens 40 First member 41 Base part 412 Convex part 422 Wavelength conversion part 50 Second member 50a Third opening 61 Holding member 61a First holding member 70 Heat dissipation member 70a First heat dissipation member 72 Protrusion 72a First protrusion 73a Third Projection 80 Annular spacer 90 Mounting mechanism A0 Area Ax0, Ax3 Virtual rotation axis Ex1 External L0 Excitation light L1 Fluorescence P0 Center

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un dispositif d'éclairage qui comprend un boîtier, une source de lumière qui émet une lumière d'excitation, un système optique qui est situé dans un espace interne à l'intérieur du boîtier, un premier élément et un second élément. Le boîtier comporte une première ouverture qui s'ouvre vers l'extérieur, et une première partie qui est pourvue d'une deuxième ouverture qui s'ouvre vers l'extérieur. Le premier élément comporte une unité de conversion qui émet une fluorescence à la suite d'une irradiation avec la lumière d'excitation, et une partie de base à laquelle l'unité de conversion est fixée. Le second élément est fixé au boîtier à partir du côté de première ouverture, le second élément comportant une troisième ouverture à travers laquelle passe la fluorescence. Le système optique comprend un filtre qui guide la lumière d'excitation de la source de lumière à l'unité de conversion et qui guide la fluorescence de l'unité de conversion à la première ouverture, et un système optique de lentille qui comprend une ou plusieurs lentilles positionnées sur l'axe optique de la fluorescence d'une unité de conversion de longueur d'onde à la première ouverture. La partie de base recouvre la deuxième ouverture depuis le côté extérieur, la partie de base étant fixée au boîtier dans un état qui permet à la partie de base d'être récupérée vers l'extérieur. Le système optique est pris en sandwich entre le second élément et la surface interne du boîtier.
PCT/JP2023/029738 2022-08-30 2023-08-17 Dispositif d'éclairage WO2024048307A1 (fr)

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JP2022-136540 2022-08-30

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017138412A1 (fr) * 2016-02-09 2017-08-17 パナソニックＩｐマネジメント株式会社 Dispositif de source de lumière et dispositif de projection
JP2021144145A (ja) * 2020-03-12 2021-09-24 セイコーエプソン株式会社 拡散装置、光学装置及びプロジェクター

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017138412A1 (fr) * 2016-02-09 2017-08-17 パナソニックＩｐマネジメント株式会社 Dispositif de source de lumière et dispositif de projection
JP2021144145A (ja) * 2020-03-12 2021-09-24 セイコーエプソン株式会社 拡散装置、光学装置及びプロジェクター

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