WO2022180927A1 - 発光モジュール - Google Patents
発光モジュール Download PDFInfo
- Publication number
- WO2022180927A1 WO2022180927A1 PCT/JP2021/038763 JP2021038763W WO2022180927A1 WO 2022180927 A1 WO2022180927 A1 WO 2022180927A1 JP 2021038763 W JP2021038763 W JP 2021038763W WO 2022180927 A1 WO2022180927 A1 WO 2022180927A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light
- laser beams
- light emitting
- optical unit
- emitting device
- Prior art date
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- 230000003287 optical effect Effects 0.000 claims abstract description 108
- 239000004065 semiconductor Substances 0.000 claims abstract description 28
- 239000013307 optical fiber Substances 0.000 claims description 17
- 239000000835 fiber Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 239000000470 constituent Substances 0.000 description 5
- 230000012447 hatching Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- 229910000980 Aluminium gallium arsenide Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
Images
Classifications
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- 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
- F21V7/04—Optical design
- F21V7/09—Optical design with a combination of different curvatures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0225—Out-coupling of light
- H01S5/02255—Out-coupling of light using beam deflecting elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4087—Array arrangements, e.g. constituted by discrete laser diodes or laser bar emitting more than one wavelength
- H01S5/4093—Red, green and blue [RGB] generated directly by laser action or by a combination of laser action with nonlinear frequency conversion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/30—Semiconductor lasers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/02208—Mountings; Housings characterised by the shape of the housings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0225—Out-coupling of light
- H01S5/02251—Out-coupling of light using optical fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0225—Out-coupling of light
- H01S5/02253—Out-coupling of light using lenses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4018—Lasers electrically in series
Definitions
- the present invention relates to light emitting modules.
- Patent Literature 1 discloses a technique for controlling the beam width of laser light to a desired size using optical members such as prisms and lenses.
- Disclosed is a technique capable of narrowing the overall irradiation area of a plurality of lights when using a plurality of lights emitted from a plurality of emission positions.
- a light-emitting module has a plurality of first semiconductor laser elements that each emit a first laser beam, and the plurality of first laser beams are spaced apart by a first distance in a slow axis direction of the first laser beam. It has a first light emitting device that emits light and a plurality of second semiconductor laser elements that each emit a second laser beam. A second light emitting device that emits a second laser and is arranged side by side with the first light emitting device in the fast axis direction, and a plurality of reflecting surfaces on which the plurality of first laser beams and the plurality of second laser beams are incident are provided.
- the interval between the plurality of first laser beams arranged in the slow axis direction is smaller than the first distance, and the plurality of second laser beams arranged in the slow axis direction a first optical unit that emits the plurality of first laser beams and the plurality of second laser beams by making the intervals between the laser beams smaller than the second distance; the plurality of first laser beams and the plurality of second laser beams; It has a plurality of second reflecting members provided with a plurality of reflecting surfaces on which the laser light is incident, and from the first laser light and the second light emitting device at a third distance in the fast axis direction from the first laser light.
- a second optical unit that reflects each of the emitted second laser beams two or more times to emit the laser beams at intervals smaller than the third distance and with a reduced width in the fast axis direction of each laser beam; and a condenser lens for condensing the plurality of first laser beams and the plurality of second laser beams that have passed through the first optical unit and the second optical unit.
- the present invention it is possible to narrow the overall irradiation area of a plurality of lights, and for example, it is possible to realize a light-emitting module that uses the narrowed plurality of lights to generate emitted light.
- FIG. 1 is a perspective view of a light emitting module according to an embodiment
- FIG. FIG. 3 is a perspective view for explaining each component arranged inside the housing of the light-emitting module according to the embodiment
- 3 is a perspective view of FIG. 2 with the first optical unit omitted
- FIG. FIG. 3 is a top view of FIG. 2 with flexible wiring omitted
- FIG. 5 is a cross-sectional view along the VV cross-sectional line of FIG. 4
- FIG. 4 is a schematic diagram showing the optical action of the first optical unit
- FIG. 10 is a schematic diagram showing the optical action of the second optical unit
- 1 is a perspective view of a light emitting device according to an embodiment
- FIG. FIG. 3 is a perspective view for explaining each component arranged inside the housing of the light-emitting module according to the embodiment
- 3 is a perspective view of FIG. 2 with the first optical unit omitted
- FIG. FIG. 3 is a top view of FIG. 2 with flexible wiring omitted
- FIG. 3 is a perspective view for explaining each component arranged inside the light emitting device according to the embodiment;
- 1 is a top view of a light emitting device according to an embodiment;
- FIG. It is a perspective view of the 1st reflecting member concerning an embodiment.
- 1 is a perspective view of a light emitting unit according to an embodiment;
- FIG. It is a schematic diagram for each demonstrating the 1st light emission width, 2nd light emission width, 1st center-to-center distance, 2nd center-to-center distance, 1st outer edge-to-edge distance, and 2nd outer edge-to-edge distance which concern on embodiment.
- It is a figure which shows an example of the simulation result of the light emitting module which concerns on embodiment.
- It is a figure which shows another example of the simulation result of the light emitting module which concerns on embodiment.
- polygons such as triangles and quadrilaterals
- polygons include shapes with corners rounded, chamfered, chamfered, rounded, etc. call. Not only the corners (ends of sides), but also the shapes processed in the middle part of the sides are called polygons. In other words, shapes that are partially processed while leaving a polygon as a base shall be included in the interpretation of "polygon" described in this specification and claims.
- the term “member” or “part” may be used when describing components.
- a “member” refers to an object that is physically treated as a single unit.
- An object that is physically treated as a single object can also be said to be an object that is treated as a single component in the manufacturing process.
- “part” refers to an object that does not have to be physically treated as a single entity. For example, “part” is used when partially catching a part of one member.
- FIG. 1 is a perspective view of a light emitting module 1.
- FIG. 2 is a perspective view for explaining a plurality of components arranged in the space inside the housing 10 of the light emitting module 1.
- FIG. 3 is a perspective view of the state shown in FIG. 2 with the first optical unit 30A omitted.
- FIG. 4 is a top view of the state shown in FIG. 2 with the flexible wiring 2B omitted.
- 5 is a cross-sectional view along the VV cross-sectional line of FIG. 4.
- FIG. 6 is a schematic diagram for explaining the optical action of the first optical unit 30A. Although FIG. 6 is based on the cross-sectional view of FIG. 5, the optical paths are indicated by hatching, and the hatching of the cross-section in FIG. 5 is omitted for clarity.
- FIG. 7 is a schematic diagram for explaining the optical action of the second optical unit 30B. Light paths are indicated by hatching.
- FIG. 8 is a perspective view of the light emitting device 20.
- FIG. FIG. 9 is a perspective view for explaining each component arranged inside the light emitting device.
- FIG. 10 is a top view of the light emitting device 20.
- FIG. the irradiation area of the light emitted from the light emitting device 20 is indicated by hatching.
- FIG. 11 is a perspective view of the first reflecting member 31.
- FIG. 12 is a perspective view of the light emitting unit 2.
- FIG. FIG. 13 shows each parameter of a first emission width, a second emission width, a first center-to-center distance, a second center-to-center distance, a first outer edge-to-edge distance, and a second outer edge-to-edge distance, which will be described in the following embodiments. It is a schematic diagram showing. Hatching indicates the same irradiation area as in FIG. 10, and also indicates the center point of this irradiation area, if necessary.
- the light-emitting module 1 includes multiple components.
- the plurality of components includes housing 10 , one or more light emitting devices 20 , one or more optical units 30 , condenser lens 40 and optical fiber 50 .
- the light emitting module 1 can include a plurality of light emitting devices 20 including a first light emitting device 20A and a second light emitting device 20B.
- the light emitting module 1 may comprise multiple optical units 30 including a first optical unit 30A and a second optical unit 30B.
- the light-emitting module 1 may also include other components.
- the light-emitting module 1 may further include a light-emitting device in addition to the plurality of light-emitting devices 20 .
- the light-emitting module 1 may not include some of the components listed here.
- the housing 10 is provided with a space for arranging other components (hereinafter referred to as an arrangement space) inside the housing 10 .
- the housing 10 can be said to be a component that defines the layout space.
- the housing 10 preferably has a structure in which gas outside the housing does not easily enter the installation space.
- the housing 10 may be formed such that the arrangement space is a closed space.
- the housing 10 has a mounting surface for mounting other components, one or more side surfaces surrounding the mounting surface, and a first surface located above the mounting surface and facing the mounting surface.
- the housing 10 has a light emitting section 12 that allows light to pass from the installation space to the outside of the housing 10 .
- the housing 10 defines an arrangement space in which the maximum length in the first direction is greater than the maximum length in the second direction perpendicular to the first direction when viewed from above.
- the first direction is equal to the X direction and the second direction is equal to the Y direction.
- the housing 10 can be formed using an aluminum alloy as a main material.
- the housing 10 can be formed using a zinc alloy, a magnesium alloy, or a copper alloy as a main material.
- the main material is the material that accounts for the largest proportion of weight or volume in the object formation. If the formation of interest is formed from one material, that material is the primary material. In other words, that a certain material is the main material includes that the ratio of the material can be 100%.
- Light emitting device 20 comprises one or more components including at least light emitting element 21 .
- the light emitting device 20 comprises a plurality of components including one or more light emitting elements 21, a package 22, one or more submounts 25, one or more reflective members 26, and one or more lens members 27. be able to.
- the light emitting device 20 may also include other components.
- the light-emitting device 20 may further include light-emitting elements in addition to the plurality of light-emitting elements 21 .
- the light-emitting device 20 may not include some of the components listed here.
- the package 22 has a rectangular outer shape with long sides and short sides when viewed from above.
- the long side direction of the package 22 is equal to the Y direction
- the short side direction of the package 22 is equal to the X direction.
- a space for arranging other components of the light emitting device 20 is provided inside the package 22 .
- This space can be a sealed space.
- the package 22 can be composed of, for example, a light-shielding base member 23 forming a recess and a translucent cover member 24 covering the recess.
- One or more light emitting elements 21 are arranged in the space inside the package 22 .
- One or more reflecting members 26 are arranged in this space.
- One or more submounts 25 are arranged in this space.
- One or more light emitting elements 21 are mounted on one or more submounts 25 .
- a semiconductor laser element can be adopted as the light emitting element 21 .
- the light emitting element 21 is not limited to a semiconductor laser element, and may be a light emitting diode or the like.
- a semiconductor laser element is used as the light emitting element 21, it is preferable that the space inside the package 22 is sealed in an airtight state. As a result, it is possible to suppress quality deterioration of light due to dust collection.
- the light emitting element 21 is arranged on the mounting surface of the package 22 (hereinafter, the mounting surface of the housing is referred to as the first mounting surface and the mounting surface of the package 22 is referred to as the second mounting surface), and emits light to the side. emit.
- a light emitting surface of the light emitting element 21 is provided on a side surface of the light emitting element 21 .
- the light emitting surface is not limited to the side surface of the light emitting element 21, and may be provided on the upper surface, for example.
- the light emitted from the emission surface of the light emitting element 21 is irradiated onto the reflection surface of the reflection member 26 .
- the light reflected by the reflecting member 26 travels upward and is emitted to the outside of the package 22 .
- the light emitted to the outside of the package 22 passes through the lens member 27 and is emitted to the outside of the light emitting device 20 .
- the light-emitting element 21 for example, a light-emitting element that emits blue light, a light-emitting element that emits green light, or a light-emitting element that emits red light can be employed. A light-emitting element that emits light of another color may be employed as the light-emitting element 21 .
- Blue light refers to light whose emission peak wavelength is within the range of 420 nm to 494 nm.
- Green light refers to light whose emission peak wavelength is in the range of 495 nm to 570 nm.
- Red light means light whose emission peak wavelength is in the range of 605 nm to 750 nm.
- One or more lens members 27 are arranged above the package 22 . One or more lens members 27 are secured to the package 22 . One or more lens members 27 provide one or more lens surfaces.
- the light that has passed through one or more lens members 27 is emitted as collimated light.
- the lens surfaces are designed such that light incident on lens member 27 is collimated. Collimated light is emitted from each lens surface provided by one or more lens members 27 .
- the light emitting device 20 emits a plurality of lights.
- the plurality of lights are emitted from the light emitting device 20 at intervals of a predetermined distance in a predetermined direction.
- a plurality of collimated lights are emitted from the light emitting device 20 .
- the light emitting device 20 emits a plurality of collimated lights.
- the light emitting device 20 emits multiple lights based on the light emitted from one or more light emitting elements 21 . Each of the plurality of lights can be light emitted from different light emitting elements 21 .
- the light emitting device 20 can have three or more light emitting elements 21 .
- An irradiation area having a first emission width and a second emission width perpendicular to the first emission width is defined from the light emitted from the light emitting device 20 on a plane perpendicular to the light traveling direction.
- the first emission width is greater than the second emission width.
- the maximum width of the light emitting region on this plane can be defined as the first light emitting width.
- a plurality of light-emitting elements 21 are arranged side by side.
- This light emitting device 20 has four light emitting elements 21 .
- a predetermined distance is provided between the adjacent light emitting elements 21 .
- the plurality of light emitting elements 21 are arranged side by side at regular intervals.
- the direction in which the plurality of light emitting elements 21 are arranged is equal to the Y direction. All of the light emitting elements 21 are semiconductor laser elements.
- a plurality of lights are emitted at intervals of a predetermined distance in the Y direction.
- a plurality of equally spaced lights are emitted from the light emitting device 20 .
- the direction in which the multiple lights are arranged is equal to the Y direction.
- the first emission width is equal in the X direction and the second emission width is equal in the Y direction.
- a semiconductor laser element which is an example of the light emitting element 21, will be described.
- Light (laser light) emitted from a semiconductor laser element has a spread. Divergent light is emitted from the emission end face of the semiconductor laser element.
- the emitting end surface of the semiconductor laser element can be called the light emitting surface of the light emitting element 21 .
- the light emitted from the semiconductor laser element forms an elliptical far-field pattern (hereinafter referred to as "FFP") on a plane parallel to the light emitting end face.
- FFP is the shape and light intensity distribution of emitted light at a position away from the emission end face.
- the light passing through the center of the elliptical shape of the FFP in other words, the light having the peak intensity in the light intensity distribution of the FFP is called light traveling along the optical axis or light passing through the optical axis.
- the light having an intensity of 1/e 2 or more with respect to the peak intensity value is referred to as the light of the main part.
- the shape of the FFP of the light emitted from the semiconductor laser element is an elliptical shape in which the stacking direction is longer than the direction perpendicular to the stacking direction on a plane parallel to the light emitting end surface.
- the stacking direction is the direction in which a plurality of semiconductor layers including an active layer are stacked in a semiconductor laser device.
- the direction perpendicular to the stacking direction can also be called the surface direction of the semiconductor layers.
- the major axis direction of the elliptical shape of the FFP can be called the fast axis direction of the semiconductor laser element, and the minor axis direction can be called the slow axis direction of the semiconductor laser element.
- the angle at which the light with the light intensity of 1/e 2 of the peak light intensity spreads is defined as the light spread angle of the semiconductor laser element.
- the divergence angle of light may be obtained from the light intensity of 1/e 2 of the peak light intensity, or from the light intensity of half the peak light intensity, for example.
- the term "light divergence angle” simply refers to the light divergence angle at a light intensity of 1/e 2 of the peak light intensity. It can be said that the spread angle in the fast axis direction is larger than the spread angle in the slow axis direction.
- a semiconductor laser element that emits blue light or a semiconductor laser element that emits green light includes a semiconductor laser element containing a nitride semiconductor.
- GaN, InGaN, and AlGaN, for example, can be used as nitride semiconductors.
- semiconductor laser elements that emit red light include those containing InAlGaP, GaInP, GaAs, and AlGaAs semiconductors.
- the fast axis direction of the laser light emitted from the light emitting device 20 is equal to the X direction, and the slow axis direction is equal to the Y direction.
- a plurality of lights emitted from the plurality of light emitting elements 21 are emitted from the light emitting device 20 such that at least the main portions of the lights do not overlap each other.
- the package 22 can be made smaller by arranging in the slow axis direction than by arranging in the fast axis direction.
- the irradiation area of the laser light can be defined from the light of the main portion.
- the first emission width can be the width of the laser light in the fast axis direction of the light in the main portion
- the second emission width can be the width of the laser light in the slow axis direction of the light in the main portion.
- the illustrated light emitting device 20 includes a plurality of submounts 25 in a one-to-one relationship with the plurality of light emitting elements 21 .
- This light emitting device 20 includes a plurality of reflecting members 26 in a one-to-one relationship with the plurality of light emitting elements 21 .
- This light emitting device 20 includes one lens member 27 having the same number of lens surfaces as the plurality of light emitting elements 21 .
- a plurality of reflecting members 26 are arranged side by side in the same direction as the direction in which the plurality of light emitting elements 21 are arranged.
- a plurality of lens surfaces are arranged side by side in the same direction as the direction in which the plurality of light emitting elements 21 are arranged.
- a plurality of lights are emitted side by side from the light emitting device 20 .
- a plurality of lights are arranged in the same direction as the direction in which the plurality of light emitting elements 21 are arranged, and are emitted from the light emitting device 20 .
- the first optical unit 30A has one or more reflecting members 31 (hereinafter referred to as first reflecting members 31).
- a plurality of reflecting surfaces 31 ⁇ /b>A are provided by one or more first reflecting members 31 .
- the multiple reflecting surfaces 31A are not on the same plane and are parallel to each other.
- a plurality of reflecting surfaces 31A are provided on the same surface side of the first optical unit 30A.
- the plurality of reflective surfaces 31A are provided at positions that do not overlap each other in a plan view seen from a direction perpendicular to a plane parallel to the reflective surface 31A, but they may partially overlap.
- the first reflecting member 31 has a stepped outer shape, and a reflecting surface 31A is formed at each successive step.
- the first reflecting member 31 is a stepped structure mirror having a plurality of stepped shapes, each step being provided with a reflecting surface 31A.
- a plurality of planes forming steps in the first reflecting member 31 are called step surfaces. It can be said that the first reflecting member 31 includes a plurality of step surfaces forming steps. Assuming that one of the continuous steps is the lower step and the other is the upper step, the plurality of step surfaces include at least the upper surface of the lower step, the upper surface of the upper step, and the side surface that intersects both upper surfaces.
- the top surface of the step surface is called the step top surface
- the side surface is called the step side surface.
- two or more step top surfaces and one or more step side surfaces are required.
- the step side surfaces meet both step top surfaces of successive steps.
- the top surface of the step and the side surface of the step perpendicularly intersect with each other, but they do not have to be perpendicular.
- the first reflecting member 31 has a bottom surface located on the opposite side of the top surface of the step.
- the plurality of step surfaces form a stepped shape with the bottom surface as a reference. It has an outer surface that intersects with the uppermost stepped surface on the opposite side of the uppermost stepped upper surface, and an outer surface that intersects with the lowermost stepped upper surface on the opposite side of the stepped upper surface.
- a plurality of stepped surfaces are between the two outer surfaces.
- the plurality of reflecting surfaces 31A are provided on the upper surfaces of the plurality of steps.
- a reflective surface 31A is provided on each stepped upper surface of successive steps.
- the reflecting surface 31A has a reflectance of 90% or more, preferably 95% or more, more preferably 99% or more, with respect to light of a specific wavelength. Although it is preferable that the reflectance of the reflecting surface 31A is higher, it is a parameter that can be appropriately set as long as the desired light can be sufficiently obtained.
- the above numerical conditions for reflectance are non-limiting conditions.
- a direction along the direction in which a step is formed on a step surface will be referred to as a step direction.
- the direction perpendicular to the line of intersection between the top surface and the side surface of the step on a plane parallel to the top surface of the step is the direction of the step on the top surface of the step.
- the direction perpendicular to the line of intersection between the top surface of the step and the side surface of the step is the direction of the step on the top surface of the step.
- the length of the upper surface of the step in the direction of the step is greater than the length of the side surface of the step that intersects with the upper surface of the step.
- the length of the upper surface of the step in the direction of the step is at least three times the length of the side surface of the step intersecting the upper surface of the step.
- the second optical unit 30B has a plurality of reflecting members 32 (hereinafter referred to as second reflecting members 32).
- a plurality of reflecting surfaces 33 are provided by a plurality of second reflecting members 32 .
- the multiple reflective surfaces 33 include one or multiple first reflective surfaces 33A and one or multiple second reflective surfaces 33B.
- the surface shapes of the first reflecting surface 33A and the second reflecting surface 33B are different curved surfaces.
- the plurality of second reflecting members 32 include a reflecting member 32A having a first reflecting surface 33A and a reflecting member 32B having a second reflecting surface 33B.
- the plurality of second reflecting members 32 may include second reflecting members 32 having two or more reflecting surfaces 33 .
- the plurality of second reflecting members 32 may include a second reflecting member 32 having only one reflecting surface 33 .
- the first reflecting surface 33A is formed in a cylindrical concave shape
- the second reflecting surface 33B is formed in a cylindrical convex shape
- the multiple second reflecting members 32 include a concave cylindrical mirror having a first reflecting surface 33A and a convex cylindrical mirror having a second reflecting surface 33B.
- the second optical unit 30B is composed of three second reflecting members 32 . It is composed of two second reflecting members 32 each having a first reflecting surface 33A and one second reflecting member 32 having a second reflecting surface 33B. Both the former two second reflecting members 32 are concave cylindrical mirrors, and the latter one second reflecting member 32 is a convex cylindrical mirror. The number of second reflecting members 32 having first reflecting surfaces 33A is greater than the number of second reflecting members 32 having second reflecting surfaces 33B.
- the condensing lens 40 is a lens for concentrating incident light to a predetermined point or area.
- the condenser lens 40 is, for example, a plano-convex lens.
- the optical fiber 50 has a fiber that connects an entrance and an exit. The light incident from the entrance propagates inside the fiber and exits from the exit.
- the optical fiber 50 has, for example, a core diameter (hereinafter referred to as a fiber diameter) of 400 ⁇ m or less at the entrance.
- the fiber diameter can range from 150 ⁇ m to 300 ⁇ m. Alternatively, the fiber diameter can range from 150 ⁇ m to 250 ⁇ m. Even smaller fiber diameters are possible.
- Light emitting module 1 Next, the light emitting module 1 will be described.
- one or more light-emitting devices 20 are arranged in the arrangement space of the housing 10 .
- One or more light emitting devices 20 are arranged on the mounting surface.
- the light emitting device 20 is arranged such that the lens member 27 faces the first surface side of the housing 10 .
- a plurality of lights are emitted upward from the light emitting device 20 .
- Each light emitting elements 21 arranged in two rows and two columns are arranged in the layout space of the housing 10 . It is not limited to 2 rows and 2 columns, and may be, for example, 3 rows and 2 columns or 3 rows and 3 columns.
- the light emitting elements 21 can be arranged on the mounting surface in N rows and M columns (where N ⁇ 2 and M ⁇ 2, and both N and M are natural numbers). In the illustrated light-emitting module 1, eight light-emitting elements 21 are arranged in four rows and two columns.
- four lights arranged in two rows and two columns are emitted from one or a plurality of light emitting devices 20 in a predetermined direction (for example, upward direction). It is not limited to 2 rows and 2 columns, and may be, for example, 3 rows and 2 columns or 3 rows and 3 columns.
- a plurality of lights travel in a predetermined direction in N rows and M columns (where N ⁇ 2 and M ⁇ 2, and both N and M are natural numbers).
- the four lights do not have to travel in the same direction. For example, they can be moved upward while approaching or separating from each other. It is preferable that the four traveling directions of light have symmetry. In the illustrated light-emitting module 1, eight lights arranged in four rows and two columns travel upward and in the Z direction.
- a plurality of light emitting elements 21 are arranged so that the row direction is equal to the X direction.
- a plurality of light emitting elements 21 are arranged such that the column direction is equal to the Y direction.
- the distance between the centers and the distance between the outer edges can be considered. With the midpoint of the first emission width as the center of light, the distance between the centers of two adjacent lights can be obtained. It is also possible to determine the distance between the centers of two adjacent lights with the midpoint of the second emission width as the center of the light. The distance between the outer edges can be obtained based on the outer edges of the irradiation regions of the light. If there is an overlap between the illumination areas of two adjacent lights, the edge-to-edge distance is zero.
- the center-to-center distance based on the first emission width is the first center-to-center distance
- the center-to-center distance based on the second emission width is the second center-to-center distance
- the outer edge-to-edge distance based on the first emission width is the first outer edge-to-edge distance
- the second center-to-center distance is the center-to-center distance based on the second emission width.
- the edge-to-edge distance based on the emission width is called a second edge-to-edge distance for distinction.
- the center-to-center distance in the row direction is equal to the first center-to-center distance
- the center-to-center distance in the column direction is equal to the second center-to-center distance
- the outer edge-to-edge distance in the row direction is the first edge-to-edge distance
- the edge-to-edge distance in the column direction is equal to the second edge-to-edge distance.
- the first light emission width, the second light emission width, the first center-to-center distance, the second center-to-center distance, the first outer edge-to-edge distance, and the second outer edge-to-edge distance are denoted by W1, W2, C1, respectively. It is exemplified by C2, E1 and E2.
- the plurality of lights emitted from the one or the plurality of light emitting devices 20 have a first center-to-center distance and a second center-to-center distance different from each other at the emission points from the one or the plurality of light emitting devices 20 .
- the first center-to-center distance is greater than the second center-to-center distance.
- the first center-to-center distance is greater than the first emission width of any of the two adjacent lights.
- the second center-to-center distance is greater than the second emission width of any two adjacent lights. That is, it can be said that there is an interval between two adjacent lights. In other words, it can be said that both the first outer edge distance and the second outer edge distance are values greater than zero.
- a plurality of light emitting devices 20 are arranged in the illustrated light emitting module 1 .
- the plurality of light emitting devices 20 includes a first light emitting device 20A and a second light emitting device 20B that are arranged side by side.
- the first light emitting device 20A and the second light emitting device 20B are arranged side by side in the row direction.
- a plurality of light-emitting elements 21 included in the light-emitting device 20 are arranged so as to line up in the column direction.
- the direction in which the first light emitting device and the second light emitting device are arranged is the same as the X direction.
- the direction in which the plurality of light emitting elements 21 provided in the light emitting device 20 are arranged is equal to the Y direction.
- the plurality of light-emitting elements 21 provided in the first light-emitting device 20A (hereinafter referred to as first light-emitting elements) and the plurality of light-emitting elements 21 provided in the second light-emitting device 20B (hereinafter referred to as second light-emitting elements) (referred to as light-emitting elements) are arranged with equal intervals (first outer edge-to-edge distances) in each row.
- the interval between the plurality of first light emitting elements (second outer edge distance) is the same as the interval between the plurality of second light emitting elements (second outer edge distance). These intervals do not have to be the same.
- the light-emitting module 1 can be easily mounted. can be.
- the illustrated light-emitting unit 2 further includes a wiring connector 2A so that power can be supplied to the two light-emitting devices 20 collectively from the wiring connector 2A.
- a flexible wiring 2B is connected to a wiring connector 2A.
- light emitted from the plurality of light-emitting elements 21 is emitted upward from one or a plurality of light-emitting devices 20 with their optical axes parallel to each other. Parallel here includes differences within ⁇ 2 degrees.
- the direction of travel of a plurality of collimated lights emitted from one or a plurality of light emitting devices 20 is the same as the Z direction.
- the first optical unit 30A is arranged in the arrangement space of the housing 10.
- the first optical unit 30A is arranged above one or more light emitting devices 20 .
- the light emitted from the light emitting device 20 is applied to the first optical unit 30A.
- Light emitted from the light emitting device 20 is reflected by the reflecting surface 31A of the first optical unit 30A.
- a plurality of lights emitted from one or a plurality of light-emitting devices 20 are irradiated onto the plurality of reflecting surfaces 31A and reflected by the plurality of reflecting surfaces 31A.
- the multiple reflective surfaces 31A have the reflectance characteristics described above for the first optical unit 30A with respect to light emitted from one or multiple light emitting devices 20 .
- the centers of the second emission widths of the plurality of lights arranged in the column direction overlap with the reflecting surfaces 31A different from each other.
- the second emission widths of the plurality of lights arranged in the column direction overlap with the reflecting surfaces 31A different from each other.
- a plurality of lights arranged in the column direction are respectively irradiated to different reflecting surfaces 31A.
- the center of the first emission width of each of the plurality of lights arranged in the row direction overlaps the same reflecting surface 31A.
- the first emission widths of the plurality of lights arranged in the row direction overlap the same reflecting surface 31A.
- the main part of the light is irradiated to one reflecting surface 31A of the plurality of reflecting surfaces 31A, and is not irradiated to the other reflecting surfaces 31A.
- the reflective surface 31A is arranged obliquely with respect to the mounting surface.
- the plurality of reflective surfaces 31A are arranged in the column direction when viewed from above.
- the plurality of reflective surfaces 31A arranged in the column direction are arranged upward from the reflective surface 31A at one end to the reflective surface 31A at the other end.
- a plurality of lights emitted from one light emitting device 20 are irradiated to one first reflecting member 31 .
- the first reflecting member 31 has reflective surfaces 31 ⁇ /b>A equal to or more than the number of lights emitted from the light emitting device 20 .
- the first optical unit 30A is composed of one first reflecting member 31 .
- One first reflecting member 31 corresponds to two light emitting devices 20 .
- One light emitting device 20 may correspond to one first reflecting member 31 .
- the first optical unit 30A emits a plurality of lights reflected by a plurality of reflecting surfaces 31A. Light emitted from the first optical unit 30A travels in the column direction. A plurality of lights arranged in the vertical direction are emitted from the first optical unit 30A. The plurality of lights arranged in the vertical direction are the plurality of lights arranged in the direction of the second emission width.
- a plurality of lights aligned in the second light emission width are aligned in the Z direction and emitted from the first optical unit 30A.
- a plurality of lights emitted from the first optical unit 30A travel in the Y direction. All of the plurality of lights emitted from the first optical unit 30A remain collimated lights.
- the second outer edge distance of the plurality of lights emitted from the first optical unit 30A and arranged in the direction of the second emission width is arranged in the direction of the second emission width at the emission points emitted from the one or the plurality of light emitting devices 20. It is smaller than the second outer edge-to-edge distance of the plurality of lights. That is, a plurality of light beams emitted from one or more light emitting devices 20 at predetermined intervals in the direction of the second emission width are emitted from the first optical unit 30A with the intervals reduced. This makes it possible to narrow the overall irradiation area of the plurality of lights arranged in the direction of the second emission width.
- the first outer edge distances of the plurality of lights emitted from the first optical unit 30A and arranged in the direction of the first emission width are arranged in the direction of the first emission width at the emission points emitted from the one or the plurality of light emitting devices 20. It is the same as the first outer edge-to-edge distance of the plurality of lights. Therefore, it can be said that the first optical unit 30A narrows the overall irradiation area of the plurality of lights.
- a plurality of lights emitted from the first light-emitting device 20A at predetermined intervals in the slow axis direction are emitted from the first optical unit 30A with the intervals reduced, resulting in the second emission.
- a plurality of lights emitted from the device 20B at predetermined intervals in the slow axis direction are emitted from the first optical unit 30A with the intervals reduced.
- the first optical unit 30A includes a plurality of laser beams (hereinafter referred to as first lasers) emitted from the first light emitting device 20A and a plurality of laser beams emitted from the second light emitting device 20B. It has one or a plurality of first reflecting members 31 provided with a plurality of reflecting surfaces 31A on which a plurality of laser beams (hereinafter referred to as second laser beams) are incident.
- the first optical unit 30A makes the interval between the plurality of first laser beams aligned in the slow axis direction smaller than the distance when emitted from the first light emitting device 20A, and sets the plurality of first laser beams aligned in the slow axis direction.
- a plurality of first laser beams and a plurality of second laser beams are emitted from the first optical unit 30A by making the intervals of the second laser beams smaller than the distance when they are emitted from the second light emitting device 20B.
- the distance between the second outer edges of the plurality of lights emitted from the first optical unit 30A and arranged in the direction of the second emission width is 0 ⁇ m or more and less than 500 ⁇ m.
- This second inter-edge distance is 300 ⁇ m or more smaller than the second inter-edge distance at the emission points of the one or more light emitting devices 20 .
- the second emission width of light emitted from the light emitting device 20 is preferably 250 ⁇ m or more and 500 ⁇ m or less. This makes it more effective to narrow the irradiation area of the entire plurality of lights by narrowing the second distance between the outer edges.
- the second optical unit 30B is arranged in the arrangement space of the housing 10.
- the second optical unit 30B is arranged above and to the side of one or more light emitting devices 20 .
- the light emitted from the light emitting device 20 is applied to the second optical unit 30B.
- the light emitted from the first optical unit 30A is applied to the second optical unit 30B.
- Light reflected by the reflecting surface 33 is emitted from the second optical unit 30B.
- the light incident on the second optical unit 30B is emitted from the second optical unit 30B after being reflected twice or more.
- the light incident on the second optical unit 30B is applied to the first reflecting surface 33A, reflected by the first reflecting surface 33A, and then applied to the second reflecting surface 33B.
- 33 A of 1st reflective surfaces change the light which injects into 33 A of 1st reflective surfaces into light to converge, and reflect it.
- the reflected convergent light travels toward the second reflecting surface 33B.
- the second reflecting surface 33B converts the light incident on the second reflecting surface 33B into collimated light and reflects it.
- the light collimated by the second reflecting surface 33B is emitted from the second optical unit 30B.
- a plurality of lights emitted from the second optical unit 30B and aligned in the direction of the first light emission width are aligned in the direction of the first light emission width at the emission points emitted from the one or more light emitting devices 20. It is smaller than the first outer edge-to-edge distance of the plurality of lights.
- a plurality of lights emitted from one or more light emitting devices 20 at predetermined intervals in the direction of the first emission width are emitted from the second optical unit 30B with the intervals reduced. This makes it possible to narrow the overall irradiation area of the plurality of lights arranged in the direction of the first emission width.
- the distance between the first outer edges of the plurality of lights emitted from the second optical unit 30B and arranged in the direction of the first emission width is the first emission width from the first optical unit 30A to the incidence on the second optical unit 30B. is smaller than the first outer edge-to-edge distance of the plurality of lights arranged in the direction of .
- the first emission widths of the plurality of lights emitted from the second optical unit 30B are smaller than the first emission widths at the emission points emitted from the one or the plurality of light emitting devices 20 .
- a plurality of lights emitted from one or a plurality of light emitting devices 20 are emitted from the second optical unit 30B with the first emission width reduced. This makes it possible to narrow the overall irradiation area of the plurality of lights arranged in the direction of the first emission width.
- the distance between the second outer edges of the plurality of lights emitted from the second optical unit 30B and arranged in the direction of the second emission width is the second distance between the plurality of lights emitted from the first optical unit 30A and arranged in the direction of the second emission width. It is the same as the distance between two outer edges. Therefore, it can be said that the second optical unit 30B narrows the overall irradiation area of the plurality of lights.
- a plurality of lights that enter the first optical unit 30A and are emitted from the first optical unit 30A enter the second optical unit 30B. That is, the light enters the first optical unit 30A first, and then enters the second optical unit 30B.
- the light emitting module can also be designed to enter the second optical unit 30B first and then enter the first optical unit 30A.
- a plurality of lights emitted from the first light-emitting device 20A and the second light-emitting device 20B at predetermined intervals in the fast axis direction are reduced in width in the fast axis direction. Then, it is emitted from the second optical unit 30B.
- the second optical unit 30B has a plurality of second reflecting members 32 having a plurality of reflecting surfaces 33 on which the plurality of first laser beams and the plurality of second laser beams are incident.
- the second optical unit 30B reflects the first laser beam and the second laser beam emitted from the second light emitting device at a predetermined distance from the first laser beam in the fast axis direction two or more times, respectively.
- Each laser beam is emitted from the second optical unit 30B at an interval smaller than a predetermined distance and with a reduced width in the fast axis direction.
- a second reflecting member 32 having a reflecting first reflecting surface 33A is arranged side by side.
- one of the two second reflecting members 32 having the first reflecting surface 33A reflects a plurality of lights emitted from the first light emitting device 20A at the second reflecting member 32, and A plurality of lights emitted from the second light emitting device 20B are not reflected.
- the plurality of lights emitted from the second light emitting device 20B are reflected and the plurality of lights emitted from the first light emitting device 20A are not reflected.
- the second reflecting member 32 having the second reflecting surface 33B reflects a plurality of lights emitted from the first light-emitting device 20A and a plurality of lights emitted from the second light-emitting device 20B. of light is reflected. Since a plurality of converged lights enter the second reflecting member 32 , it is easy to collectively reflect them by one reflecting surface 33 . When separate second reflecting members 32 are arranged, a space is required. , can be made smaller than would be required if placed separately.
- a condensing lens 40 is arranged in the arrangement space of the housing 10 in the light emitting module 1 .
- the condenser lens 40 receives a plurality of lights that have entered the first optical unit 30A and are emitted from the first optical unit 30A, and that have entered the second optical unit 30B and are emitted from the second optical unit 30B. A plurality of lights are incident.
- the condensing lens 40 collects a plurality of lights that have passed through the first optical unit 30A and the second optical unit 30B.
- the optical fiber 50 is connected to the light emitting section 12 of the housing 10 .
- the optical fiber 50 is attached, for example, to the exit of the housing 10 .
- a plurality of lights that have passed through the condenser lens 40 are incident on the optical fiber 50 .
- a plurality of lights condensed by the condensing lens 40 enter the entrance of the optical fiber 50 . Light entering from the entrance of the optical fiber 50 propagates through the fiber and exits from the exit.
- a plurality of lights condensed by the condensing lens 40 enter the optical fiber 50 .
- the fiber diameter at the entrance of the optical fiber 50 can be reduced by reducing the irradiation area of the entire plurality of lights by the first optical unit 30A and the second optical unit 30B.
- FIG. 14 is a diagram showing an example of simulation results of a plurality of lights irradiated to the entrance of the optical fiber 50 in the light emitting module 1 shown.
- the circle in the figure can be assumed to be the fiber diameter at the entrance of the optical fiber 50 .
- the result is that eight beams can be collected and launched into a fiber diameter of 207 ⁇ m.
- FIG. 15 shows simulation results assuming a light-emitting module 1 with greater mounting variations than the light-emitting module 1 in FIG. In this figure, the result is that eight beams can be collected and launched into a fiber diameter of 242 ⁇ m. Assuming an ideal light emitting module 1, a result was obtained that light could be incident on a fiber diameter of 169 ⁇ m.
- the light-emitting module 1 can make 6 or more and 12 or less lights emitted from one or a plurality of light-emitting devices 20 enter a fiber diameter of 150 ⁇ m or more and 300 ⁇ m or less. . 6 or more and 10 or less lights emitted from one or a plurality of light emitting devices 20 can be made incident on a fiber diameter of 150 ⁇ m or more and 250 ⁇ m or less. By using the technology disclosed in the light-emitting module 1, it is possible to make more light enter a smaller fiber diameter without being limited to this condition.
- the light-emitting device according to the present invention is not strictly limited to the light-emitting devices of the embodiments. In other words, the present invention cannot be realized unless it is limited to the outer shape and structure of the light emitting device disclosed in the embodiments. It can be applied without making it mandatory to have all the components necessary and sufficient. For example, if some of the constituent elements of the light-emitting device disclosed in the embodiments are not described in the claims, the partial constituent elements may be replaced, omitted, modified in shape, or changed in material. The degree of freedom of design by a person skilled in the art is recognized, and it is specified that the invention described in the claims is applied.
- the light-emitting device described in each embodiment can be used for lighting, projectors, in-vehicle headlights, head-mounted displays, displays, and the like.
- Light Emitting Module 10 Case 12 Light Emitting Part 20 Light Emitting Device 20A First Light Emitting Device 20B Second Light Emitting Device 21 Light Emitting Element 22 Package 23 Base Member 24 Lid Member 25 Submount 26 Reflecting Member 27 Lens Member 30 Optical Unit 30A First Optics Unit 31 First reflecting member 31A Reflecting surface 30B Second optical unit 32 Second reflecting member 32A Reflecting member 32B Reflecting member 33 Reflecting surface 33A First reflecting surface 33B Second reflecting surface 40 Collecting lens 50 Optical fiber 2 Light emitting unit 2A Wiring Connector 2B flexible wiring
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Abstract
Description
実施形態に係る発光モジュール1を説明する。図1から図13は、発光モジュール1の例示的な一形態を説明するための図面である。図1は、発光モジュール1の斜視図である。図2は、発光モジュール1の筐体10内部の空間に配置される複数の構成要素を説明するための斜視図である。図3は、図2の状態からさらに第1光学ユニット30Aを省いた状態の斜視図である。図4は、図2の状態からさらにフレキシブル配線2Bを省いた状態の上面図である。図5は、図4のV-V断面線における断面図である。図6は、第1光学ユニット30Aによる光学作用を説明するための模式図である。図6は図5の断面視に基づいているが、光路をハッチングで示し、見易さのために図5で断面を示したハッチングは省かれている。図7は、第2光学ユニット30Bによる光学作用を説明するための模式図である。光路はハッチングで示されている。図8は、発光装置20の斜視図である。図9は、発光装置の内部に配置される各構成要素を説明するための斜視図である。図10は、発光装置20の上面図である。なお、発光装置20から出射される光の照射領域をハッチングで示している。図11は、第1反射部材31の斜視図である。図12は、発光ユニット2の斜視図である。図13は、以下の実施形態で説明される第1発光幅、第2発光幅、第1中心間距離、第2中心間距離、第1外縁間距離、及び、第2外縁間距離の各パラメータを示す模式図である。ハッチングは図10と同様の照射領域を示しており、必要に応じてこの照射領域の中心点も示している。
筐体10には、その内側において、他の構成要素を配置するための空間(以下、配置空間と呼ぶものとする。)が設けられる。言い換えれば、筐体10は、配置空間を規定する構成要素といえる。筐体10は、筐体外部の気体が配置空間内に容易に侵入しない構造であることが好ましい。例えば、配置空間が密閉空間となるように、筐体10を形成してもよい。
発光装置20は、少なくとも発光素子21を含む、1または複数の構成要素を備える。発光装置20は、1または複数の発光素子21、パッケージ22、1または複数のサブマウント25、1または複数の反射部材26、及び、1または複数のレンズ部材27を含む、複数の構成要素を備えることができる。
第1光学ユニット30Aは、1または複数の反射部材31(以下、第1反射部材31と呼ぶ。)を有する。1または複数の第1反射部材31により複数の反射面31Aが設けられる。複数の反射面31Aは、同一平面上になく、かつ、互いに平行である。複数の反射面31Aは、第1光学ユニット30Aの同じ面側に設けられる。この複数の反射面31Aは、この反射面31Aに平行な平面に垂直な方向から見た平面視で、互いに重ならない位置に設けられているが、一部で重なっていてもよい。
第2光学ユニット30Bは、複数の反射部材32(以下、第2反射部材32と呼ぶ。)を有する。複数の第2反射部材32により複数の反射面33が設けられる。複数の反射面33には、1または複数の第1反射面33Aと、1または複数の第2反射面33Bと、が含まれる。第1反射面33A及び第2反射面33Bの面形状は、それぞれ異なる曲面となる。
集光レンズ40は、入射した光を、所定の点または領域に集めるためのレンズである。集光レンズ40は、例えば、平凸レンズである。
光ファイバ50は、入射口と出射口とを繋ぐファイバを有する。入射口から入射した光は、ファイバ内部を伝搬して、出射口から出射される。光ファイバ50は、例えば、入射口におけるコアの直径(以下、ファイバ径と呼ぶ。)が400μm以下である。ファイバ径は150μm以上300μm以下の範囲とすることができる。あるいは、ファイバ径は150μm以上250μm以下の範囲とすることができる。さらに小さいファイバ径であってもよい。
次に、発光モジュール1について説明する。
発光モジュール1において、筐体10の配置空間に、1または複数の発光装置20が配置される。1または複数の発光装置20は、実装面に配置される。発光装置20は、レンズ部材27が筐体10の第1面側を向くように配置される。複数の光が、発光装置20から上方に向かって出射される。
10 筐体
12 光出射部
20 発光装置
20A 第1発光装置
20B 第2発光装置
21 発光素子
22 パッケージ
23 基部材
24 蓋部材
25 サブマウント
26 反射部材
27 レンズ部材
30 光学ユニット
30A 第1光学ユニット
31 第1反射部材
31A 反射面
30B 第2光学ユニット
32 第2反射部材
32A 反射部材
32B 反射部材
33 反射面
33A 第1反射面
33B 第2反射面
40 集光レンズ
50 光ファイバ
2 発光ユニット
2A 配線コネクタ
2B フレキシブル配線
Claims (8)
- それぞれ第1レーザ光を出射する複数の第1半導体レーザ素子を有し、前記第1レーザ光の遅軸方向に第1距離の間隔をあけて前記複数の第1レーザ光を出射する第1発光装置と、
それぞれ第2レーザ光を出射する複数の第2半導体レーザ素子を有し、前記第2レーザ光の遅軸方向に第2距離の間隔をあけて前記複数の第2レーザを出射し、速軸方向に前記第1発光装置と並べて配置される第2発光装置と、
前記複数の第1レーザ光及び複数の第2レーザ光が入射する複数の反射面を設ける1または複数の第1反射部材を有し、前記遅軸方向に並ぶ前記複数の第1レーザ光の間隔を前記第1距離よりも小さくし、かつ、前記遅軸方向に並ぶ前記複数の第2レーザ光の間隔を前記第2距離よりも小さくして、前記複数の第1レーザ光及び複数の第2レーザ光を出射する第1光学ユニットと、
前記複数の第1レーザ光及び複数の第2レーザ光が入射する複数の反射面を設ける複数の第2反射部材を有し、前記第1レーザ光と、前記第1レーザ光から速軸方向に第3距離をあけて前記第2発光装置から出射された前記第2レーザ光をそれぞれ2回以上反射して、前記第3距離よりも小さい間隔で、かつ、各レーザ光の前記速軸方向の幅を小さくして出射する第2光学ユニットと、
前記第1光学ユニット及び前記第2光学ユニットを経由した前記複数の第1レーザ光及び複数の第2レーザ光を集光する集光レンズと、
を備える、発光モジュール。 - 前記集光レンズによって集光された前記複数の第1レーザ光及び複数の第2レーザ光が入射する光ファイバ、をさらに備える、請求項1に記載の発光モジュール。
- 前記複数の第1レーザ光及び複数の第2レーザ光は、全部で6以上のレーザ光で構成され、
前記光ファイバの、前記複数の第1レーザ光及び複数の第2レーザ光が入射するファイバ径は、150μm以上300μm以下である、請求項2に記載の発光モジュール。 - 前記第1光学ユニットは、複数の段形状が形成され、各段に前記反射面が設けられた段構造ミラーであり、
前記複数の第2反射部材は、第1凹面シリンドリカルミラー、及び、凸面シリンドリカルミラーを含む、請求項1乃至3のいずれか一項に記載の発光モジュール。 - 前記複数の第2反射部材は、第2凹面シリンドリカルミラーをさらに含み、
前記第1凹面シリンドリカルミラーにおいて、前記複数の第1レーザ光が反射され、かつ、前記複数の第2レーザ光は反射されず、
前記第2凹面シリンドリカルミラーにおいて、前記複数の第2レーザ光が反射され、かつ、前記複数の第1レーザ光は反射されず、
前記凸面シリンドリカルミラーにおいて、前記複数の第1レーザ光及び複数の第2レーザ光が反射される、請求項4に記載の発光モジュール。 - 前記第1距離と前記第2距離は同じである、請求項1乃至5のいずれか一項に記載の発光モジュール。
- 前記第2光学ユニットには、前記第1光学ユニットから出射された前記複数の第1レーザ光及び複数の第2レーザ光が入射する、請求項1乃至6のいずれか一項に記載の発光モジュール。
- 前記第1発光装置は、コリメート光にして前記複数の第1レーザ光を出射し、
前記第2発光装置は、コリメート光にして前記複数の第2レーザ光を出射する、請求項1乃至7のいずれか一項に記載の発光モジュール。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013130692A (ja) * | 2011-12-21 | 2013-07-04 | Sanyo Electric Co Ltd | 光源装置及び投写型映像表示装置 |
WO2016067822A1 (ja) * | 2014-10-28 | 2016-05-06 | ソニー株式会社 | 光源装置及びプロジェクタ |
JP2018155791A (ja) * | 2017-03-15 | 2018-10-04 | 株式会社フジクラ | 光モジュール |
JP2020095939A (ja) * | 2018-12-12 | 2020-06-18 | 日亜化学工業株式会社 | 発光モジュールの製造方法、発光モジュール及びプロジェクタ |
JP2020136386A (ja) * | 2019-02-15 | 2020-08-31 | 日亜化学工業株式会社 | 発光装置、及び、光学装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4711155B2 (ja) | 2009-06-30 | 2011-06-29 | カシオ計算機株式会社 | 光源装置及びプロジェクタ |
JP6113426B2 (ja) | 2011-09-08 | 2017-04-12 | ギガフォトン株式会社 | マスタオシレータシステムおよびレーザ装置 |
JP6393466B2 (ja) | 2013-10-02 | 2018-09-19 | 株式会社島津製作所 | 発光装置 |
EP3180652A4 (en) | 2014-08-14 | 2018-04-04 | Mtt Innovation Incorporated | Multiple-laser light source |
TWI575299B (zh) * | 2015-05-08 | 2017-03-21 | 中強光電股份有限公司 | 照明系統以及投影裝置 |
JP2017010636A (ja) * | 2015-06-17 | 2017-01-12 | ウシオ電機株式会社 | Ld光源装置および光源装置 |
JP2017054764A (ja) | 2015-09-11 | 2017-03-16 | ウシオ電機株式会社 | 蛍光光源装置 |
CN110082998A (zh) * | 2018-01-25 | 2019-08-02 | 深圳光峰科技股份有限公司 | 激光合光装置及显示设备 |
JP7174251B2 (ja) * | 2019-03-22 | 2022-11-17 | 日亜化学工業株式会社 | 光源装置および光学エンジン |
JP2020204734A (ja) | 2019-06-18 | 2020-12-24 | パナソニックIpマネジメント株式会社 | 光源装置 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013130692A (ja) * | 2011-12-21 | 2013-07-04 | Sanyo Electric Co Ltd | 光源装置及び投写型映像表示装置 |
WO2016067822A1 (ja) * | 2014-10-28 | 2016-05-06 | ソニー株式会社 | 光源装置及びプロジェクタ |
JP2018155791A (ja) * | 2017-03-15 | 2018-10-04 | 株式会社フジクラ | 光モジュール |
JP2020095939A (ja) * | 2018-12-12 | 2020-06-18 | 日亜化学工業株式会社 | 発光モジュールの製造方法、発光モジュール及びプロジェクタ |
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