Light source module, fluid ultraviolet light processing device

Abstract

This provides a light source module with a form that makes it easy to illuminate a specific area. [Solution] The light source includes a plurality of first light-emitting units, the light control unit includes a plurality of first light control units, each of the first light control units overlapping with one of the first light-emitting units which are different from each other in a top view to form a first laminate, the substrate has a central region and an outer peripheral region located outside the central region, each of the first laminates is arranged in the outer peripheral region, each of the first laminates includes a first light control unit having a planar first incident surface facing the first light-emitting unit side and a convex first exit surface curving away from the first incident surface, a cross section including a first axis passing through the center of the first exit surface and perpendicular to the first incident surface in a top view includes a first cross section with different curvatures on both sides of the first exit surface with respect to the first axis, and in at least one of the first laminates, the optical axis of the first light control unit is nonparallel to the first axis.

Description

Technical Field

[0001] The present disclosure relates to a light source module and a fluid ultraviolet light treatment device.

Background Art

[0002] There is known a lighting device having a plurality of light emitting parts. For example, a first light emitting part composed of a plurality of first light emitting elements connected in series, and a second light emitting part composed of a plurality of second light emitting elements connected in series and emitting light with a light color different from that of the first light emitting part, and a lighting device in which the light distribution angle of the illumination light changes according to the switching of the light color of the illumination light by selective lighting of the first light emitting part and the second light emitting part.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present disclosure is to provide a light source module in a form that easily irradiates light onto a specific region.

Means for Solving the Problems

[0005] A light source module according to one embodiment of the present disclosure comprises a substrate, a light source disposed on the upper surface of the substrate, and an optical member disposed above the substrate with the light source in between, wherein the light source includes a plurality of first light-emitting units, the optical unit includes a plurality of first optical unit components, each of which overlaps with one of the first light-emitting units that are different from each other in a top view to form a first laminate, the substrate has a central region and an outer peripheral region located outside the central region, each of which the first laminate is disposed in the outer peripheral region, and in each of the first laminates, the first optical unit includes a planar first incident surface facing the first light-emitting unit side and a convex first exit surface curving away from the first incident surface, and in a top view, a cross section including a first axis passing through the center of the first exit surface and perpendicular to the first incident surface includes a first cross section with different curvatures on both sides of the first exit surface with respect to the first axis, and in at least one of the first laminates, the optical axis of the first optical unit is nonparallel to the first axis. [Effects of the Invention]

[0006] According to one embodiment of the present disclosure, a light source module in a form that facilitates illuminating a specific area with light can be provided. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view illustrating a light source module according to the first embodiment. [Figure 2] This is a partial top view (1) illustrating a light source module according to the first embodiment. [Figure 3] Figure 2 is a partial top view of the light source module with the optical components removed. [Figure 4] This is a partial top view (2) illustrating a light source module according to the first embodiment. [Figure 5] This is a schematic diagram showing an enlarged view of section A1 in Figure 4. [Figure 6] This is a schematic diagram showing a cross-section of the first laminate S1 along the line VI-VI in Figure 5. [Figure 7]This is a schematic diagram showing a cross-section of the first laminate S1 along the line VII-VII in Figure 5. [Figure 8] This is a perspective view illustrating the first optical control unit. [Figure 9] This is a cross-sectional view (1) illustrating the second layer. [Figure 10] This is a cross-sectional view (2) illustrating the second layer. [Figure 11] This is a schematic diagram illustrating the direction of light emitted from the light source module according to the first embodiment. [Figure 12] This is a partial top view illustrating a light source module according to Modification 1 of the First Embodiment. [Figure 13] This is a schematic diagram showing an enlarged view of section A2 in Figure 12. [Figure 14] Figure 13 is a schematic diagram showing a cross-section of the third layer S3 along the line XIV-XIV. [Figure 15] Figure 13 is a schematic diagram showing a cross-section of the third laminate S3 along the line XV-XV. [Figure 16] This is a schematic diagram illustrating the direction of light emitted from a light source module according to Modification 1 of the First Embodiment. [Figure 17] This is a partial top view illustrating a light source module according to a modified example 2 of the first embodiment. [Figure 18] This is a schematic diagram illustrating the direction of light emitted from a light source module according to a modified example 2 of the first embodiment. [Figure 19] This is a partial top view illustrating a light source module according to a modified example 3 of the first embodiment. [Figure 20] This is a schematic diagram illustrating the direction of light emitted from a light source module according to Modification 3 of the First Embodiment. [Figure 21] This is a perspective view illustrating an optical component used in a light source module according to a modified example 4 of the first embodiment. [Figure 22] This is a perspective view illustrating a fluid ultraviolet light processing apparatus according to the second embodiment. [Figure 23] Figure 21 shows a cross-sectional view along the line XXIII-XXIII. [Figure 24]It is a perspective view illustrating a fluid ultraviolet light treatment apparatus according to Modification 1 of the second embodiment. [Figure 25] It is a cross-sectional view taken along line XXV-XXV of FIG. 24.

Mode for Carrying Out the Invention

[0008] Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In the following description, terms indicating a specific direction or position (for example, "upper", "lower", and other terms including those terms) are used as necessary. However, the use of those terms is for facilitating the understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meaning of those terms. Also, parts denoted by the same reference numerals in a plurality of drawings indicate the same or equivalent parts or members.

[0009] Furthermore, the embodiments shown below exemplify a light source module or the like for embodying the technical idea of the present invention, and do not limit the present invention thereto. Also, the dimensions, materials, shapes, relative arrangements, etc. of the components described below are not intended to limit the scope of the present invention only thereto without specific description, but are intended to be illustrative. Also, the content described in one embodiment is applicable to other embodiments and modifications. Also, the sizes and positional relationships of the members shown in the drawings may be exaggerated for clarity of explanation. Furthermore, in order to avoid making the drawings overly complex, schematic diagrams omitting the illustration of some elements may be used.

[0010] 〈First Embodiment〉 FIG. 1 is a perspective view illustrating a light source module according to the first embodiment. FIG. 2 is a partial top view (1) illustrating the light source module according to the first embodiment. FIG. 3 is a partial top view of the state where the optical member is removed from the light source module shown in FIG. 2.

[0011] In each drawing, for reference, mutually orthogonal X, Y, and Z axes are shown as needed. The direction parallel to the X axis is called the first direction X, the direction parallel to the Y axis is called the second direction Y, and the direction parallel to the Z axis is called the third direction Z. Furthermore, in the first direction X, the direction the arrow is pointing is called the +X direction, and the opposite direction of the +X direction is called the -X direction. In the second direction Y, the direction the arrow is pointing is called the +Y direction, and the opposite direction of the +Y direction is called the -Y direction. In the third direction Z, the direction the arrow is pointing is called the +Z direction, and the opposite direction of the +Z direction is called the -Z direction. However, these do not restrict the orientation when using the light source module, and the orientation of the light source module is arbitrary.

[0012] As shown in Figures 1 to 3, the light source module 1 includes a substrate 10, a light source 20, an optical element 30, a base portion 40, a fixing member 50, a holding member 60, and a spring member 70. The light source module 1 does not necessarily have to include the base portion 40, the fixing member 50, the holding member 60, and the spring member 70. In Figure 1, CS1 schematically indicates the position of a specific cross-section parallel to the third direction Z. The line indicating CS1 is a virtual line, and such a line does not actually exist. Details of CS1 will be described later.

[0013] The substrate 10 is, for example, rectangular in top view. In the illustrated example, the top surface 10a and bottom surface of the substrate 10 are flat surfaces, the longer side of the top surface 10a is parallel to the first direction X, and the shorter side is parallel to the second direction Y. Also, the normal to the top surface 10a is parallel to the third direction Z. However, the shape of the substrate 10 is not limited to a rectangle in top view. The substrate 10 has wiring 11 in a predetermined pattern. A connector 12 that is electrically connected to the wiring 11 may or may not be placed on the top surface 10a of the substrate 10. Unless otherwise specified, top view refers to viewing the light source module 1 from the direction of the normal to the top surface 10a of the substrate 10.

[0014] The light source 20 is positioned on the upper surface 10a of the substrate 10. The optical element 30 is positioned above the substrate 10, with the light source 20 in between. The optical element 30 may or may not be in contact with the light source 20. The light source 20 and the optical element 30 will be described in detail separately.

[0015] In the illustrated example, a pair of base portions 40 are fixed on the substrate 10, and the optical member 30 is held by the base portions 40. Specifically, fixing members 50 are provided on the upper surface of each base portion 40, facing each other and sandwiching the optical member 30 when viewed from above.

[0016] The fixing member 50 is, for example, a plate-shaped metal. The fixing member 50 has, for example, a fixing portion 51 that extends in the short-side direction (Y direction) of the upper surface 10a of the substrate 10 and is fixed to the base portion 40, and spring portions 52 that extend from both ends of the fixing portion 51 onto the upper surface of the optical member 30. The fixing portion 51 can be fixed to the upper surface of the base portion 40 by, for example, screw fastening. The fixing member 50 presses the optical member 30 against the substrate 10 and holds it in place on the base portion 40.

[0017] The substrate 10 on which the light source 20 and optical element 30 are provided can be fixed, for example, on a plate-shaped holding member 60. The substrate 10 can be fixed to the upper surface of the holding member 60, for example, by screws, adhesive, or the like.

[0018] Two spring members 70 are arranged on the holding member 60, extending in the direction of the long side (X direction) of the upper surface 10a of the substrate 10. The spring members 70 can be arranged facing each other with the substrate 10 in between when viewed from above. The spring members 70 are, for example, metal plate springs. The spring members 70 can be fixed to the upper surface of the holding member 60 by, for example, screws. The number of spring members 70 is not limited to two, but can be any number of one or more. Also, the shape of the spring members 70 is not limited to the shape exemplified in Figure 1, but can be any shape. The spring members 70 can be used when fixing the light source module 1 in a predetermined space.

[0019] The light source module 1 may have a jack mechanism instead of the spring member 70. The jack mechanism can be, for example, a mechanism in which the support member moves vertically relative to the upper surface of the holding member 60 by the rotation of a screw member. For example, the light source module 1 can be inserted into a predetermined space with the support member in the lowered position, and then the light source module 1 can be fixed in the predetermined space by rotating the screw member to raise the support member.

[0020] As shown in Figure 3, the substrate 10 has at least a central region R1 and an outer peripheral region R2 located outside the central region R1 as the area where the light source 20 is placed. The central region R1 and the outer peripheral region R2 are regions of the upper surface 10a of the substrate 10.

[0021] In the example shown in Figure 3, the substrate 10 further has an intermediate region R3 located between the central region R1 and the outer peripheral region R2. The central region R1 is located closer to the center than boundary B1. The outer peripheral region R2 is located between boundary B2 and boundary B3. The intermediate region R3 is located between boundary B1 and boundary B2. Boundary B1 is located inside boundary B2. Boundary B2 is located inside boundary B3 and outside boundary B1. Note that in Figure 3, boundaries B1, B2, and B3 are shown as dashed lines, but in reality, such lines do not exist.

[0022] The light source 20 includes a plurality of first light-emitting units 21. In the examples shown in Figures 1 to 3, the light source 20 further includes one or more second light-emitting units 22 and a plurality of third light-emitting units 23. In Figure 3, for convenience, the first light-emitting units 21 are shown with dot patterns of the same density, the plurality of second light-emitting units 22 are shown with dot patterns of the same density, the plurality of third light-emitting units 23 are shown with dot patterns of the same density, and the first light-emitting units 21, the second light-emitting units 22, and the third light-emitting units 23 are shown with dot patterns of different densities.

[0023] In a top view, multiple first light-emitting units 21 are arranged in the outer peripheral region R2. One or more second light-emitting units 22 are arranged in the central region R1. In a top view, multiple third light-emitting units 23 are arranged in the intermediate region R3. Each of the first light-emitting units 21, second light-emitting units 22, and third light-emitting units 23 is connected to each other in series via wiring 11. Note that the first light-emitting units 21 are not arranged in the central region R1. The second light-emitting units 22 are not arranged in the outer peripheral region R2. The first light-emitting units 21 and second light-emitting units 22 are not arranged in the intermediate region R3. The third light-emitting units 23 are not arranged in the central region R1 or the outer peripheral region R2.

[0024] For example, the number of first light-emitting units 21 located in the outer region R2 is greater than the number of second light-emitting units 22 located in the central region R1. The number of third light-emitting units 23 located in the intermediate region R3 is greater than the number of second light-emitting units 22 located in the central region R1, and less than the number of first light-emitting units 21 located in the outer region R2.

[0025] In the example shown in Figure 3, the first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23 are light-emitting units of the same specifications, although they are located in different areas. Here, "same specifications" means that at least the wavelength band of the emitted light, the emission intensity, and the beam angle are the same. The first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23 emit ultraviolet light, for example. In this case, the light source module 1 can emit ultraviolet light from the optical member 30. The first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23 may emit light in wavelength bands other than ultraviolet light.

[0026] When the first light-emitting section 21, the second light-emitting section 22, and the third light-emitting section 23 emit ultraviolet light, the peak wavelength of the ultraviolet light is, for example, 10 nm to 405 nm. It is preferable that the difference in the peak wavelengths of the light emitted by the first light-emitting section 21, the second light-emitting section 22, and the third light-emitting section 23 is within 5 nm. The first light-emitting section 21, the second light-emitting section 22, and the third light-emitting section 23 include light-emitting elements. As light-emitting elements, for example, LEDs (Light Emitting Diodes) or LDs (Laser Diodes) can be used. As the first light-emitting section 21, the second light-emitting section 22, and the third light-emitting section 23, for example, a light-emitting device in which light-emitting elements are mounted on a package can be used. As the material of the package, ceramics and / or resin can be used.

[0027] The first light-emitting section 21, the second light-emitting section 22, and the third light-emitting section 23 may each emit light in different wavelength bands. For example, the first light-emitting section 21, the second light-emitting section 22, and the third light-emitting section 23 may include two or more light-emitting sections from among those with a peak emission wavelength of 260 nm to 280 nm, those with a peak emission wavelength greater than 280 nm and less than 315 nm, and those with a peak emission wavelength of 315 nm to 405 nm. For example, one configuration that includes these three light-emitting sections is one in which the peak emission wavelength of the first light-emitting section 21 is 260 nm to 280 nm, the peak emission wavelength of the second light-emitting section 22 is 315 nm to 405 nm, and the peak emission wavelength of the third light-emitting section 23 is greater than 280 nm and less than 315 nm. Furthermore, the peak wavelengths of the emission from the first light-emitting section 21 and the second light-emitting section 22, the first light-emitting section 21 and the third light-emitting section 23, and the second light-emitting section 22 and the third light-emitting section 23 may be swapped.

[0028] In the examples shown in Figures 1 to 3, 14 first light-emitting units 21 are arranged in the outer peripheral region R2. Additionally, 5 second light-emitting units 22 are arranged in the central region R1. Furthermore, 9 third light-emitting units 23 are arranged in the intermediate region R3. Note that the number of light-emitting units arranged in each region is not limited to the examples in Figures 1 to 3.

[0029] The optical element 30 has a square shape when viewed from above. The optical element 30 may also have a rectangular, circular, or elliptical shape when viewed from above. Note that the terms square and rectangle here include not only shapes with right angles but also shapes with chamfered corners.

[0030] The optical element 30 includes a light control unit 35. The optical element 30 has an upper surface and a lower surface, and the light control unit 35 is located on the upper surface of the optical element 30. The light control unit 35 is a protrusion that projects toward the side opposite to the light source 20. When viewed from above, each protrusion is thickest in the center and becomes thinner as it moves away from the center. The thickness of the protrusion refers to the distance from the upper surface of the optical element 30 to the surface of the protrusion in the direction normal to the upper surface of the optical element 30.

[0031] The optical control unit 35 (convex portion) can function as a convex lens. In the examples shown in Figures 1 to 3, the shape of the convex portion is circular when viewed from above. The optical member 30 can be formed from, for example, glass or resin. Examples of glass include quartz glass and borosilicate glass. Examples of resin include silicone-based resin.

[0032] The optical control unit 35 includes a plurality of first optical control units 31. In the example shown in Figures 1 to 3, the optical control unit 35 further includes one or more second optical control units 32 and a plurality of third optical control units 33. The first optical control units 31 are located in the outer peripheral region when viewed from above the optical member 30. The second optical control units 32 are located in the central region when viewed from above the optical member 30. The third optical control units 33 are located in the intermediate region between the central region and the outer peripheral region when viewed from above the optical member 30.

[0033] For example, assuming that the outer edge of a single light control unit is a circle when viewed from above, adjacent light control units may or may not have overlapping areas where their outer edge circles overlap. In the example in Figure 2, adjacent first light control units 31 do not have overlapping areas where their outer edge circles overlap when viewed from above, but they may have overlapping areas where their outer edge circles overlap. In the example in Figure 2, adjacent third light control units 33 have overlapping areas where their outer edge circles overlap when viewed from above, but they may not have overlapping areas where their outer edge circles overlap. In the example in Figure 2, adjacent first light control unit 31 and third light control unit 33 have overlapping areas where their outer edge circles overlap when viewed from above, but they may not have overlapping areas where their outer edge circles overlap. In the example in Figure 2, adjacent second light control unit 32 and third light control unit 33 do not have overlapping areas where their outer edge circles overlap when viewed from above, but they may have overlapping areas where their outer edge circles overlap. In Figure 2, assuming that the outer edge of a single optical control unit is a circle when viewed from above, the arcs where the circles representing the outer edges of the optical control units overlap are virtually shown as dashed lines. The same applies to Figures 4, 5, 6, 12, 13, 14, 17, and 19 thereafter.

[0034] Each of the first light control units 31 receives light from one overlapping first light-emitting unit 21 when viewed from above. The incident light has its beam angle narrowed by a protrusion of the first light control unit 31 and is emitted from the side opposite to the substrate 10 (the top side). Each of the second light control units 32 receives light from one or more overlapping second light-emitting units 22 when viewed from above. The incident light has its beam angle narrowed by a protrusion of the second light control unit 32 and is emitted from the side opposite to the substrate 10. Each of the third light control units 33 receives light from one overlapping third light-emitting unit 23 when viewed from above. The incident light has its beam angle narrowed by a protrusion of the third light control unit 33 and is emitted from the side opposite to the substrate 10.

[0035] The first light control unit 31, the second light control unit 32, and the third light control unit 33 may have the same or different thicknesses of their protrusions. The first light control unit 31, the second light control unit 32, and the third light control unit 33 may have the same or different areas of their protrusions when viewed from above. The first light control unit 31, the second light control unit 32, and the third light control unit 33 may have the same or different curvatures of their protrusions. The beam angle can be adjusted by changing the thickness of the protrusions, the area of ​​the protrusions when viewed from above, and / or the curvature of the protrusions.

[0036] In the illustrated example, each of the multiple first light control units 31 constituting the optical element 30 overlaps with a single, distinct first light-emitting unit 21 in a top view, and the second light control unit 32 constituting the optical element 30 overlaps with four second light-emitting units 22 in a top view. This makes it possible to realize a light source module with an optical element 30 in which the multiple first light-emitting units 21 arranged in the outer peripheral region R2 are individually optically controlled by the first light control units 31, and the four second light-emitting units 22 arranged in the central region R1 are optically controlled collectively by a single second light control unit 32.

[0037] Furthermore, the light source module 1 may have a plurality of third light-emitting units 23 and a plurality of third light-control units 33 as needed, and each of the plurality of third light-control units 33 may be arranged to overlap with a single third light-emitting unit 23 that is different from each other when viewed from above. This makes it possible to realize a light source module equipped with an optical member 30 in a form corresponding to the arrangement of the light source 20 including the first light-emitting unit 21, the second light-emitting unit 22, and the third light-emitting unit 23.

[0038] Figure 4 is a partial top view (2) illustrating a light source module according to the first embodiment. As shown in Figure 4, each first light control unit 31 overlaps with one different first light-emitting unit 21 in a top view to form a first stacked body S1. Each first stacked body S1 is arranged in the outer peripheral region R2 shown in Figure 3. In addition, one or more second light control units 32 overlap with one or more second light-emitting units 22 in a top view to form the same number of second stacked bodies S2 as the second light control units 32. In the illustrated example, one second light control unit 32 overlaps with four second light-emitting units 22 in a top view to form one second stacked body S2. The second stacked body S2 is arranged in the central region R1 shown in Figure 3. In addition, each third light control unit 33 overlaps with one different third light-emitting unit 23 in a top view to form a third stacked body S3. Each third stacked body S3 is arranged in the intermediate region R3 shown in Figure 3.

[0039] In Figure 4, CS1 and CS2 schematically represent the positions of specific cross-sections parallel to the third direction Z. The lines representing CS1 and CS2 are imaginary lines and do not actually exist. The same applies to the other figures. Details of CS1 and CS2 will be described later.

[0040] Figure 5 is a schematic diagram showing an enlarged view of section A1 in Figure 4. Figure 6 is a schematic diagram showing a cross-section of the first laminate S1 along the line VI-VI in Figure 5. The line VI-VI is parallel to the second direction Y. The cross-section along the line VI-VI is the first cross-section CS1. That is, Figure 6 shows the first cross-section CS1. Figure 7 is a schematic diagram showing a cross-section of the first laminate S1 along the line VII-VII in Figure 5. The line VII-VII is parallel to the first direction X. The cross-section along the line VII-VII is the second cross-section CS2. That is, Figure 7 shows the second cross-section CS2. Figure 8 is a perspective view illustrating the first optical control unit. Note that the first cross-section CS1 and the second cross-section CS2 are orthogonal.

[0041] In Figures 5 to 8, 21a indicates the light-emitting surface of the first light-emitting unit 21, and 21o indicates the center of the light-emitting surface 21a of the first light-emitting unit 21 in a top view. Also, 31a indicates the first incident surface of the first light control unit 31, 31b indicates the first exit surface of the first light control unit 31, and 31o indicates the center of the first exit surface 31b in a top view. Furthermore, 31x indicates the first axis passing through the center 31o of the first exit surface 31b and perpendicular to the first incident surface 31a, and 31y indicates the optical axis of the first light control unit 31. The optical axis 31y is the optical path of light emitted from the center 21o of the light-emitting surface 21a of the first light-emitting unit 21. Figures 6 and 7 are cross-sections passing through the center 21o of the light-emitting surface 21a of the first light-emitting unit 21 and including the first axis 31x. In this application, the center of the light-emitting surface in a top view means the geometric center of the light-emitting surface when the light-emitting surface is viewed from above. Similarly, the center of the exit surface in a top view refers to the geometric center of the exit surface when viewed from above.

[0042] As shown in Figures 5 to 8, in each first laminate S1, the first light control unit 31 includes a planar first incident surface 31a facing the first light-emitting section 21 and a convex first exit surface 31b that curves away from the first incident surface 31a. In each first laminate S1, the cross section including the first axis 31x includes a first cross section CS1 in which the curvature on both sides of the first exit surface 31b differs with respect to the first axis 31x. In this application, different curvatures refer to the case where the side with the larger curvature has a curvature greater than 102% of the side with the smaller curvature. Same curvatures refer to the case where the curvatures on both sides are perfectly the same, as well as the case where the side with the larger curvature has a curvature of 102% or less of the side with the smaller curvature.

[0043] In the example of the first cross-section CS1 shown in Figure 6, the curvature of the first exit surface 31b located on the side closer to the central region R1 shown in Figure 3 (in the +Y direction in Figure 6) with respect to the first axis 31x is smaller than the curvature of the first exit surface 31b located on the side further from the central region R1 shown in Figure 3 (in the -Y direction in Figure 6) with respect to the first axis 31x.

[0044] At least one first laminate S1 includes a first cross section CS1 with different curvatures on both sides of the first emission surface 31b, thereby making the optical axis 31y of the first light control unit 31 non-parallel to the first axis 31x. As a result, the light source module 1 can easily irradiate a specific area with light. In this application, parallel means when the misalignment between the axes in question is less than 2 degrees. Non-parallel means when the misalignment between the axes in question is 2 degrees or more.

[0045] Each first laminate S1 may or may not include a first cross-section CS1 having different curvatures on both sides of the first emission surface 31b. By including a first cross-section CS1 having different curvatures on both sides of the first emission surface 31b in each first laminate S1, the optical axis 31y of the first light control unit 31 can be made non-parallel to the first axis 31x. Furthermore, by adjusting the orientation of the first cross-section CS1 having different curvatures on both sides of the first emission surface 31b in each first laminate S1 when viewed from above, it is possible to easily irradiate a specific region with light from each first laminate S1.

[0046] In at least one first laminate S1, the center 21o of the light-emitting surface 21a of the first light-emitting unit 21 may or may not be on the first cross section CS1 when viewed from above. In all first laminates S1, the center 21o of the light-emitting surface 21a of the first light-emitting unit 21 may or may not be on the first cross section CS1 when viewed from above.

[0047] In at least one first laminate S1, the first axis 31x may or may not pass through the center 21o of the light-emitting surface 21a of the first light-emitting unit 21. In all first laminates S1, the first axis 31x may or may not pass through the center 21o of the light-emitting surface 21a of the first light-emitting unit 21.

[0048] In part or all of the first laminate S1, the first axis 31x does not have to pass through the center 21o of the light-emitting surface 21a of the first light-emitting unit 21, but it does. In other words, in a top view, the center 31o and the center 21o do not have to coincide, but they do. The positional relationship between the first light-emitting unit 21 and the first light-control unit 31 can be adjusted within the range in which the center 21o of the light-emitting surface 21a overlaps with the first emission surface 31b of the first light-control unit 31 in a top view. In addition to the difference in curvature on both sides of the first emission surface 31b in the first cross section CS1, the degree to which the optical axis 31y of the first light-control unit 31 is non-parallel to the first axis 31x can be changed by adjusting the positional relationship between the center 31o and the center 21o in a top view.

[0049] In the second cross-section CS2 shown in Figure 7, the curvature on both sides of the first emission surface 31b is the same with respect to the first axis 31x. Note that even when there is a portion where circles indicating the outer edges of adjacent light-control units overlap in a top view, as shown in Figure 2, the curvature on both sides of the first emission surface 31b is included in the same shape. Thus, in each first laminate S1, the cross-section including the first axis 31x may include a second cross-section CS2 that is perpendicular to the first cross-section CS1 and has the same curvature on both sides of the first emission surface 31b with respect to the first axis 31x. In all cross-sections parallel to the second cross-section CS2, the curvature on both sides of the first emission surface 31b may be the same with respect to an axis passing through the first cross-section CS1 and perpendicular to the first incident surface 31a. Furthermore, in all cross-sections parallel to the first cross-section CS1, the curvature on both sides of the first exit surface 31b may differ with respect to an axis passing through the second cross-section CS2 and perpendicular to the first incident surface 31a.

[0050] In Figures 4, 5, and 8, the arrows in the first cross-section CS1 indicate the direction of the side with smaller curvature of the first emission surface 31b. In the example in Figure 4, all first stacked bodies S1 include the first cross-section CS1 and the second cross-section CS2. In the first cross-section CS1 of all first stacked bodies S1, the curvature of the first emission surface 31b located closer to the central region R1 shown in Figure 3 with respect to the first axis 31x is smaller than the curvature of the first emission surface 31b located further away from the central region R1 shown in Figure 3 with respect to the first axis 31x. This makes it easier for the light source module 1 to irradiate light from all first stacked bodies S1 toward the center of the central region R1.

[0051] In Figure 4, in at least one first laminate S1, the extension of the first cross section CS1 passes through the central region R1 shown in Figure 3 when viewed from above. In all first laminates S1, the extension of the first cross section CS1 may or may not pass through the central region R1 shown in Figure 3 when viewed from above. When viewed from above, the extensions of the first cross section CS1 of all first laminates S1 may or may not intersect at a single point. By having the extensions of the first cross section CS1 of all first laminates S1 intersect at a single point, the light emitted from each first laminate S1 can be focused into a narrower region.

[0052] Figure 9 is an illustrative cross-sectional view (1) of the second laminate. Figure 9 shows a cross-section parallel to the YZ plane, passing through the center of the second light control unit 32 in a top view in Figure 2. In Figure 9, 22a is the light-emitting surface of the second light-emitting unit 22, and 22o is the center of the light-emitting surface 22a of the second light-emitting unit 22 in a top view. Also, 32a is the second incident surface of the second light control unit 32, 32b is the second exit surface of the second light control unit 32, and 32o is the center of the second exit surface 32b in a top view. Furthermore, 32x is the second axis passing through the center 32o of the second exit surface 32b and perpendicular to the second incident surface 32a, and 32y is the optical axis of the second light control unit 32. The optical axis 32y is the optical path of light emitted from the center 22o of the light-emitting surface 22a of the second light-emitting unit 22.

[0053] As shown in Figure 9, in each second laminate S2, the second light control unit 32 includes a planar second incident surface 32a facing the second light-emitting section 22 and a convex second exit surface 32b that curves away from the second incident surface 32a. In this case, in all cross-sections including the second axis 32x that passes through the center 32o of the second exit surface 32b and is perpendicular to the second incident surface 32a when viewed from above, the curvature on both sides of the second exit surface 32b can be made the same with respect to the second axis 32x. That is, in a standalone state where the second light control unit 32 does not overlap with an adjacent light control unit, it can be rotationally symmetric with respect to the second axis 32x. In the second laminate S2 shown in Figure 9, the optical axis of the second light control unit 32 is parallel to the third direction Z.

[0054] Figure 10 is a cross-sectional view (2) illustrating a second stack. As shown in Figure 10, if the light source module has multiple second stacks S2, the optical axis of the second light control unit 32 may be parallel to the second axis 32x in all second stacks S2, but it is preferable that the optical axis of the second light control unit 32 is non-parallel to the second axis 32x in at least one second stack S2. In both Figure 9 and Figure 10, it is possible to easily irradiate light from the second stack S2 toward the center of the central region R1.

[0055] In the example shown in Figure 10, the second stacked layers S2 other than the central layer include a third cross-section CS3 with different curvatures on both sides of the second emission surface 32b, relative to the second axis 32x. In the second stacked layers S2 other than the central layer, the curvature of the second emission surface 32b located closer to the central region R1 shown in Figure 3 with respect to the second axis 32x is smaller than the curvature of the second emission surface 32b located further away from the central region R1 shown in Figure 3 with respect to the second axis 32x. This makes it possible to make the optical axis of the second light control unit 32 non-parallel to the second axis 32x in the second stacked layers S2 other than the central layer. In both cases of Figure 9 and Figure 10, it is possible to easily irradiate light from the second stacked layers S2 toward the center of the central region R1.

[0056] In addition, in the light source module 1, the direction of light emitted from all third stacked layers S3 is parallel to the third direction Z.

[0057] Thus, as schematically shown in Figure 11, the light source module 1 makes it easier to irradiate light from the first stacked body S1 towards the center of the central region R1. Furthermore, it makes it easier to irradiate light from the second stacked body S2 towards the center of the central region R1. For example, this is effective when the object to be irradiated is located towards the center of the central region R1.

[0058] Furthermore, in each first laminate S1, the curvature of the first emission surface 31b located closer to the central region R1 shown in Figure 3 with respect to the first axis 31x can be made greater than the curvature of the first emission surface 31b located further away from the central region R1 shown in Figure 3 with respect to the first axis 31x. In this case, it becomes easier to irradiate light from the first laminate S1 in a direction away from the central region R1. For example, this is effective when the object to be irradiated with light is located in a direction away from the central region R1.

[0059] <Variation 1 of the First Embodiment> Modification 1 of the first embodiment shows an example of a light source module in which the shape of the protrusion of the third optical control unit 33 in the third laminate S3 differs from that of the first embodiment. In Modification 1 of the first embodiment, the first laminate S1 and the second laminate S2 are the same as in the first embodiment.

[0060] Figure 12 is a partial top view illustrating a light source module according to Modification 1 of the First Embodiment. In Figure 12, CS4 and CS5 schematically indicate the positions of specific cross-sections parallel to the third direction Z. The lines representing CS4 and CS5 are imaginary lines and do not actually exist. The same applies to the other figures. Details of CS4 and CS5 will be described later.

[0061] Figure 13 is a schematic diagram showing an enlarged view of section A2 in Figure 12. Figure 14 is a schematic diagram showing a cross-section of the third laminate S3 along the line XIV-XIV in Figure 13. The line XIV-XIV is parallel to the second direction Y. The cross-section along the line XIV-XIV is the fourth cross-section CS4. That is, Figure 14 shows the fourth cross-section CS4. Figure 15 is a schematic diagram showing a cross-section of the third laminate S3 along the line XV-XV in Figure 13. The line XV-XV is parallel to the first direction X. The cross-section along the line XV-XV is the fifth cross-section CS5. That is, Figure 15 shows the fifth cross-section CS5. Note that the fourth cross-section CS4 and the fifth cross-section CS5 are orthogonal.

[0062] In Figures 12 to 15, 23a indicates the light-emitting surface of the third light-emitting unit 23, and 23o indicates the center of the light-emitting surface 23a of the third light-emitting unit 23 in a top view. Also, 33a indicates the third incident surface of the third light control unit 33, 33b indicates the third exit surface of the third light control unit 33, and 33o indicates the center of the third exit surface 33b in a top view. Furthermore, 33x indicates the third axis passing through the center 33o of the third exit surface 33b and perpendicular to the third incident surface 33a, and 33y indicates the optical axis of the third light control unit 33. The optical axis 33y is the optical path of light emitted from the center 23o of the light-emitting surface 23a of the third light-emitting unit 23. Note that Figures 14 and 15 are cross-sections passing through the center 23o of the light-emitting surface 23a of the third light-emitting unit 23 and including the third axis 33x.

[0063] As shown in Figures 12 to 15, in each third laminate S3, the third light control unit 33 includes a planar third incident surface 33a facing the third light-emitting section 23 and a convex third exit surface 33b that curves away from the third incident surface 33a. In each third laminate S3, the cross section including the third axis 33x includes a fourth cross section CS4 with different curvatures on both sides of the third exit surface 33b, with respect to the third axis 33x.

[0064] In the example of the fourth cross-section CS4 shown in Figure 14, the curvature of the third exit surface 33b located on the side closer to the central region R1 shown in Figure 3 (in the +Y direction in Figure 14) with respect to the third axis 33x is smaller than the curvature of the third exit surface 33b located on the side further from the central region R1 shown in Figure 3 (in the -Y direction in Figure 14) with respect to the third axis 33x.

[0065] By including at least one third stack S3 that contains a fourth cross-section CS4 with different curvatures on both sides of the third emission surface 33b, the optical axis 33y of the third light control unit 33 can be made non-parallel to the third axis 33x. As a result, the light source module 1A can be made more efficient at illuminating specific areas with light.

[0066] Each third laminate S3 may or may not include a fourth cross section CS4 with different curvatures on both sides of the third emission surface 33b. In each third laminate S3, by adjusting the orientation of the fourth cross section CS4 with different curvatures on both sides of the third emission surface 33b when viewed from above, it is possible to make it easier to illuminate a specific region with light from all of the third laminates S3.

[0067] In at least one third laminate S3, the center 23o of the light-emitting surface 23a of the third light-emitting part 23 may or may not be on the fourth cross section CS4 when viewed from above. In all third laminates S3, the center 23o of the light-emitting surface 23a of the third light-emitting part 23 may or may not be on the fourth cross section CS4 when viewed from above.

[0068] In at least one third laminate S3, the third axis 33x may or may not pass through the center 23o of the light-emitting surface 23a of the third light-emitting unit 23. In all third laminates S3, the third axis 33x may or may not pass through the center 23o of the light-emitting surface 23a of the third light-emitting unit 23.

[0069] In part or all of the third laminate S3, the third axis 33x does not have to pass through the center 23o of the light-emitting surface 23a of the third light-emitting unit 23, or it does. In other words, in a top view, the centers 33o and 23o do not have to coincide, or they do. The positional relationship between the third light-emitting unit 23 and the third light-control unit 33 can be adjusted within the range in which the center 23o of the light-emitting surface 23a overlaps with the third emission surface 33b of the third light-control unit 33 in a top view. In addition to the difference in curvature on both sides of the third emission surface 33b in the fourth cross section CS4, the degree to which the optical axis 33y of the third light-control unit 33 is non-parallel to the third axis 33x can be changed by adjusting the positional relationship between the centers 33o and 23o in a top view.

[0070] In the fifth cross section CS5 shown in Figure 15, the curvature on both sides of the third emission surface 33b is the same with respect to the third axis 33x. Furthermore, even when there is an overlapping portion between circles indicating the outer edges of adjacent light control units in a top view, the curvature on both sides of the third emission surface 33b is included in the same shape. Thus, in each third laminate S3, the cross section containing the third axis 33x may or may not include the fifth cross section CS5, which is perpendicular to the fourth cross section CS4, and where the curvature on both sides of the third emission surface 33b is the same with respect to the third axis 33x. In all cross sections parallel to the fifth cross section CS5, the curvature on both sides of the third emission surface 33b may or may not be the same with respect to an axis passing through the fourth cross section CS4 and perpendicular to the third incident surface 33a. Furthermore, in all cross-sections parallel to the fourth cross-section CS4, the curvature on both sides of the third exit surface 33b may or may not be different, with reference to an axis passing through the fifth cross-section CS5 and perpendicular to the third incident surface 33a.

[0071] In Figures 12 and 13, the arrow in the fourth cross section CS4 indicates the direction of the side with smaller curvature of the third emission surface 33b. In the example in Figure 12, all third stacks S3 include the fourth cross section CS4 and the fifth cross section CS5. In all third stacks S3, the curvature of the third emission surface 33b located closer to the central region R1 shown in Figure 3 with respect to the third axis 33x is smaller than the curvature of the third emission surface 33b located further away from the central region R1 shown in Figure 3 with respect to the third axis 33x. This makes it easier for the light source module 1A to irradiate light from all third stacks S3 toward the center of the central region R1.

[0072] In Figure 12, in at least one third stack S3, the extension of the fourth cross section CS4 passes through the central region R1 shown in Figure 3 when viewed from above. In all third stack S3s, the extension of the fourth cross section CS4 may or may not pass through the central region R1 shown in Figure 3 when viewed from above. When viewed from above, the extensions of the fourth cross section CS4 of all third stack S3s may or may not intersect at a single point. By having the extensions of the fourth cross section CS4 of all third stack S3s intersect at a single point, the light emitted from each third stack S3 can be focused into a narrower region.

[0073] Thus, as schematically shown in Figure 16, the light source module 1A can easily irradiate light from the first stacked layer S1 toward the center of the central region R1. Furthermore, it can easily irradiate light from the second stacked layer S2 toward the center of the central region R1. In addition, it can easily irradiate light from the third stacked layer S3 toward the center of the central region R1. In other words, the light source module 1A can concentrate more light toward the center of the central region R1 than the light source module 1.

[0074] <Modification 2 of the First Embodiment> Modification 2 of the first embodiment shows an example of a light source module in which the orientation of the first cross-section CS1 in the first laminate S1 is different from that of the first embodiment. In Modification 2 of the first embodiment, the second laminate S2 and the third laminate S3 are the same as in the first embodiment.

[0075] Figure 17 is a partial top view illustrating a light source module according to a modified example 2 of the first embodiment. In the light source module 1B, in all first stacked bodies S1, the optical axis of the first optical control unit 31 is non-parallel to the first axis 31x. In the light source module 1B, all first stacked bodies S1 include a first cross section CS1 and a second cross section CS2. In all first stacked bodies S1, in a top view, the first cross sections CS1 are parallel to each other or on the same plane, and in each first cross section CS1, the positional relationship between the side with a large curvature and the side with a small curvature of the first emission surface 31b with respect to the first axis 31x is the same.

[0076] In the example shown in Figure 17, the curvature of the first emission surface 31b located in the +X direction with respect to the first axis 31x is smaller than the curvature of the first emission surface 31b located in the -X direction with respect to the first axis 31x. This makes it easier for the light source module 1B to irradiate light in a specific direction from all first stacked bodies S1. Specifically, as schematically shown in Figure 18, it is possible to irradiate light from each first stacked body S1 diagonally upward in the +X direction. Each first stacked body S1 has an optical axis parallel to the first cross section CS1 when viewed from above, and the light emitted from each first stacked body S1 is directed from the -X direction to the +X direction when viewed from above. In the light source module 1B, by making the first cross section CS1 parallel to a specific direction when viewed from above, it is possible to irradiate light parallel to the first cross section CS1 when viewed from above in a specific direction from each first stacked body S1.

[0077] <Modification 3 of the First Embodiment> Modification 3 of the first embodiment shows an example of a light source module in which the orientation of the fourth cross-section CS4 in the third laminate S3 differs from that of Modification 2 of the first embodiment. In Modification 3 of the first embodiment, the second laminate S2 and the third laminate S3 are the same as in the first embodiment.

[0078] Figure 19 is a partial top view illustrating a light source module according to a third modification of the first embodiment. In the light source module 1C, the optical axis of the third optical control unit 33 is non-parallel to the third axis 33x in all third stacks S3. In the light source module 1C, all third stacks S3 include a fourth cross section CS4 and a fifth cross section CS5. In all third stacks S3, in a top view, the fourth cross section CS4 is parallel to or on the same plane as the first cross section CS1, and in each fourth cross section CS4, the positional relationship between the side with greater curvature and the side with less curvature of the third emission surface 33b with respect to the third axis 33x is the same as the positional relationship between the side with greater curvature and the side with less curvature of the first emission surface 31b with respect to the first axis 31x in the first cross section CS1.

[0079] In the example shown in Figure 19, the curvature of the third emission surface 33b located in the +X direction with respect to the third axis 33x is smaller than the curvature of the third emission surface 33b located in the -X direction with respect to the third axis 33x. This makes it easier for the light source module 1B to irradiate light in a specific direction from all first stacked layers S1. Specifically, as schematically shown in Figure 20, it is possible to irradiate light from each first stacked layer S1 and third stacked layer S3 diagonally upward in the +X direction. Each first stacked layer S1 and third stacked layer S3 has an optical axis parallel to the first cross section CS1 and fourth cross section CS4 when viewed from above, and the light irradiated from each first stacked layer S1 and third stacked layer S3 is directed from the -X direction to the +X direction when viewed from above. In the light source module 1C, by aligning the first cross section CS1 and the fourth cross section CS4 parallel to a specific direction when viewed from above, light parallel to the first cross section CS1 and the fourth cross section CS4 when viewed from above can be emitted from the first laminate S1 and the third laminate S3 in a specific direction. In other words, the light source module 1C can emit more light in a predetermined direction than the light source module 1B.

[0080] <Modification 4 of the First Embodiment> Modification 4 of the first embodiment shows an example in which individual light control units are used. In the above description, an example was shown in which an optical member equipped with multiple light control units is used in the light source module. However, a light source module may also be used with multiple optical members each equipped with one light control unit.

[0081] Figure 21 is a perspective view illustrating an optical component used in a light source module according to a modification 4 of the first embodiment. As shown in Figure 21, the optical component 30A has a light control unit 35 positioned above one light-emitting part of the light source 20. The light control unit 35 may include, for example, a first cross section CS1 and a fourth cross section CS4. In Figure 21, CS1 (CS4) schematically indicates the position of the first cross section CS1 or the fourth cross section CS4. The line indicating CS1 (CS4) is a virtual line and does not actually exist.

[0082] The light source 20 is, for example, a light-emitting device in which one light-emitting element is mounted on a package. In this case, the first laminate S1 and the third laminate S3 can be constructed by using the optical member 30A. The light source 20 may also be a light-emitting device in which one or more light-emitting elements are mounted on a package. In this case, the second laminate S2 can be constructed by using the optical member 30A. By arranging these multiple optical members 30A in positions as shown in Figure 2, for example, a light source module can be constructed.

[0083] <Second Embodiment> The second embodiment shows an example of a fluid ultraviolet light processing apparatus having a light source module according to the first embodiment.

[0084] Figure 22 is a perspective view illustrating a fluid ultraviolet light processing apparatus according to the second embodiment. Figure 23 is a cross-sectional view taken along line XXIII-XXIII in Figure 22. In Figure 23, arrows with a dot pattern schematically indicate the fluid flow. Arrows without a dot pattern schematically indicate the direction of ultraviolet light emitted by the light source module.

[0085] As shown in Figures 22 and 23, the fluid ultraviolet light processing apparatus 2 includes a fluid channel 210 through which fluid flows, and two light source modules 1 capable of irradiating the fluid channel 210 with ultraviolet light emitted from the optical element 30. There may be one light source module 1 or three or more.

[0086] The flow pipe 210 has a fluid inlet 211 and an outlet 212, a flow channel 213 through which the fluid flows, a first connecting part 214 connecting the inlet 211 and the flow channel 213, and a second connecting part 215 connecting the outlet 212 and the flow channel 213. The fluid flows in from the inlet 211, passes through the flow channel 213, and flows out from the outlet 212. The direction of fluid flow may be opposite.

[0087] The first connection section 214 is provided with a light source placement section 214a into which one of the light source modules 1 is inserted. The light source placement section 214a is positioned such that the direction in which one of the light source modules 1 is inserted is approximately perpendicular to the direction in which the fluid flows into the inflow section 211, and the optical member 30 of the inserted light source module 1 faces the flow path section 213. One of the light source modules 1 is inserted into the light source placement section 214a and fixed to the light source placement section 214a by a spring member 70 (see Figure 1).

[0088] The second connection section 215 is provided with a light source placement section 215a into which the other light source module 1 is inserted. The light source placement section 215a is positioned such that the direction in which the other light source module 1 is inserted is approximately perpendicular to the direction in which the fluid flows out from the outflow section 212, and the optical member 30 of the inserted light source module 1 faces the flow path section 213. The other light source module 1 is inserted into the light source placement section 215a and fixed to the light source placement section 215a by a spring member 70 (see Figure 1).

[0089] The lower surface of one of the holding members 60 (see Figure 1) constituting the light source module 1 can be positioned to make surface contact with the inner wall surface of the light source placement section 214a. Similarly, the lower surface of the other holding member 60 (see Figure 1) constituting the light source module 1 can be positioned to make surface contact with the inner wall surface of the light source placement section 215a. This allows the heat generated during the operation of each light source module to be dissipated into the fluid flowing around the light source placement section.

[0090] The flow channel 213 extends in the direction normal to the upper surface 10a (see Figure 1) of the substrate 10 of one light source module 1. The flow channel 213 also extends in the direction normal to the upper surface 10a (see Figure 1) of the substrate 10 of the other light source module 1. Each light source module 1 can irradiate the flow channel 213 with ultraviolet light emitted from the optical element 30.

[0091] As shown in the examples in Figures 22 and 23, the fluid ultraviolet light processing device 2 can irradiate the fluid flowing through the channel 213 with ultraviolet light from two light source modules 1. This allows the fluid ultraviolet light processing device 2 to process the fluid by irradiating it with ultraviolet light, thereby reducing, for example, the number of bacteria and viruses in the treated water compared to the water before treatment. The fluid can include liquids, gases, etc.

[0092] The inlet section 211 is located on the opposite side of the light source placement section 214a from the flow path section 213. Between the outer wall surface of the light source placement section 214a and the inner wall surface of the first connection section 214, there are gaps on the upper and lower sides of the light source placement section 214a, facing each other. The fluid flowing from the inlet section 211 into the first connection section 214 flows into the flow path section 213 through these gaps on the upper and lower sides of the light source placement section 214a, facing each other.

[0093] Furthermore, the outlet section 212 is located on the opposite side of the light source placement section 215a from the flow path section 213. Between the outer wall surface of the light source placement section 215a and the inner wall surface of the second connection section 215, there are gaps on the upper and lower sides of the light source placement section 215a, facing each other. The fluid flowing from the flow path section 213 into the second connection section 215 flows out to the outlet section 212 through the gaps on the upper and lower sides of the light source placement section 215a, facing each other.

[0094] The fluid velocity in the flow channel 213 may be faster in the central part of the flow channel 213 than in the outer part, or vice versa. In the example shown in Figure 23, the fluid flowing into the flow channel 213 through the upper side of the outer wall surface of the light source placement section 214a and the fluid flowing into the flow channel 213 through the lower side merge in the central part 213c of the flow channel 213, so the fluid velocity in the central part 213c is faster than the fluid velocity in the outer part. In this case, by using a light source module 1 that can concentrate light on the central part 213c of the flow channel 213, the amount of ultraviolet light irradiated to the central part 213c can be increased, thereby improving the sterilization performance. Note that light source module 1A may be used instead of light source module 1. By using light source module 1A, the amount of ultraviolet light irradiated to the central part 213c can be increased even further, thereby improving the sterilization performance.

[0095] Furthermore, in the light source module 1, light is concentrated in the central part 213c of the flow channel section 213, thereby reducing vignetting caused by the light source placement.

[0096] <Modification 1 of the second embodiment> Modification 1 of the second embodiment shows an example of a fluid ultraviolet light processing apparatus having a different light source module than that of the second embodiment. In the fluid ultraviolet light processing apparatus according to Modification 1 of the second embodiment, the direction in which the light source module is inserted with respect to the fluid inflow and outflow direction is different from that of the fluid ultraviolet light processing apparatus according to the second embodiment.

[0097] Figure 24 is a perspective view illustrating a fluid ultraviolet light processing apparatus according to Modification 1 of the second embodiment. Figure 25 is a cross-sectional view taken along the line XXV-XXV in Figure 24. In Figure 25, arrows with a dot pattern schematically indicate the fluid flow. Arrows without a dot pattern schematically indicate the direction of ultraviolet light emitted by the light source module. As shown in Figures 24 and 25, the fluid ultraviolet light processing apparatus 2A differs from the fluid ultraviolet light processing apparatus 2 in that the two light source modules 1 are replaced with two light source modules 1B.

[0098] Furthermore, in the fluid ultraviolet light processing apparatus 2A, unlike the fluid ultraviolet light processing apparatus 2, the light source arrangement section 214a is arranged such that the direction in which one light source module 1B is inserted is approximately parallel to the direction in which the fluid flows into the inlet section 211, and the optical member 30 of the inserted light source module 1B faces the flow channel section 213. In addition, the light source arrangement section 215a is arranged such that the direction in which the other light source module 1B is inserted is approximately parallel to the direction in which the fluid flows out from the outlet section 212, and the optical member 30 of the inserted light source module 1B faces the flow channel section 213.

[0099] In the example shown in Figure 25, the inlet 211 is located on the opposite side of the light source placement section 214a from the flow path section 213. Between the outer wall surface of the light source placement section 214a and the inner wall surface of the first connection section 214, there are gaps on the near and far sides of the light source placement section 214a. The fluid flowing from the inlet 211 into the first connection section 214 flows into the flow path section 213 through these gaps on the near and far sides of the light source placement section 214a.

[0100] Furthermore, the outlet section 212 is located on the opposite side of the flow path section 213 from the light source placement section 215a. Between the outer wall surface of the light source placement section 215a and the inner wall surface of the second connection section 215, there are gaps on the near side and the far side of the light source placement section 215a, facing each other. The fluid flowing from the flow path section 213 into the second connection section 215 flows out to the outlet section 212 through the gaps on the near side and the far side of the light source placement section 215a, facing each other.

[0101] The fluid flowing from the inlet 211 to the first connection 214 flows into the flow channel 213, passing through the front and back sides of the outer wall surface of the light source placement section 214a. In Figure 25, the fluid passing through the front and back sides of the outer wall surface of the light source placement section 214a is indicated by dashed arrows. The fluid flowing into the flow channel 213 through the front side of the outer wall surface of the light source placement section 214a and the fluid flowing into the flow channel 213 through the back side merge at the upper outer periphery 213o of the flow channel 213, resulting in a flow velocity at the upper outer periphery 213o being faster than the flow velocity at the center and the lower outer periphery. The reason for the merger at the upper outer periphery 213o is that there is no fluid flowing into the flow channel 213 by passing over the outer wall surface of the light source placement section 214a, as in the example in Figure 23. In this case, by using a light source module 1B that can concentrate light on the upper outer periphery 213o of the flow channel section 213, the amount of ultraviolet light irradiated to the upper outer periphery 213o can be increased, thereby improving the sterilization performance. Alternatively, a light source module 1C may be used instead of light source module 1B. By using light source module 1C, the amount of ultraviolet light irradiated to the upper outer periphery 213o can be increased even further, thereby further improving the sterilization performance.

[0102] Preferred embodiments have been described in detail above. However, the embodiments are not limited to those described above, and various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims.

[0103] For example, the light control unit may be a cylindrical lens or a Fresnel lens.

[0104] In addition to the embodiments described above, the following further notes are disclosed. (Note 1) circuit board and A light source arranged on the upper surface of the substrate, It comprises an optical control unit and an optical member positioned above the substrate with the light source in between, The light source includes a plurality of first light-emitting units, The optical control unit includes a plurality of first optical control units, Each of the first light control units overlaps with one of the first light-emitting units, which are different from each other when viewed from above, to form a first laminate. The substrate has a central region and an outer peripheral region located outside the central region, and each of the first laminates is arranged in the outer peripheral region. In each of the first laminates, the first light control unit comprises a planar first incident surface facing the first light-emitting unit and a convex first exit surface curving away from the first incident surface, and in a top view, the cross section including a first axis passing through the center of the first exit surface and perpendicular to the first incident surface includes a first cross section with different curvatures on both sides of the first exit surface with respect to the first axis. A light source module in which, in at least one of the first laminates, the optical axis of the first optical control unit is non-parallel to the first axis. (Note 2) The light source module according to Appendix 1, wherein in at least one of the first laminates, the center of the light-emitting surface of the first light-emitting portion is located on the first cross-section when viewed from above. (Note 3) In each of the first laminates, the cross section including the first axis includes a second cross section perpendicular to the first cross section, wherein the curvature on both sides of the first exit surface is the same with respect to the first axis. The light source module according to Appendix 1 or 2, wherein in at least one of the first laminates, in a top view, the extension of the first cross section passes through the central region, and in the first cross section, the curvature of the first emission surface located closer to the central region with respect to the first axis is smaller than the curvature of the first emission surface located further away from the central region with respect to the first axis. (Note 4) In all of the first laminates, the optical axis of the first optical control unit is non-parallel to the first axis. In all of the first laminates, the cross-section including the first axis includes the second cross-section. The light source module as described in Appendix 3, wherein in all of the first laminates, in a top view, the extension of the first cross section passes through the central region, and in the first cross section, the curvature of the first emission surface located closer to the central region with respect to the first axis is smaller than the curvature of the first emission surface located further away from the central region with respect to the first axis. (Note 5) In all of the first laminates, the optical axis of the first optical control unit is non-parallel to the first axis. In all of the first laminates, the cross section including the first axis includes a second cross section perpendicular to the first cross section, wherein the curvature on both sides of the first exit surface is the same with respect to the first axis. The light source module according to Appendix 1 or 2, wherein in all of the first laminates, the first cross-sections are parallel to each other in a top view, and in each first cross-section, the positional relationship between the side with a large curvature and the side with a small curvature of the first emission surface with respect to the first axis is the same. (Note 6) The light source further includes one or more second light-emitting units, The optical control unit further includes one or more second optical control units, One or more of the second light control units overlap with one or more of the second light-emitting units in a top view, forming the same number of second laminates as the second light control units. Each of the second laminates is arranged in the central region, In each of the second laminates, the second light control unit comprises a planar second incident surface facing the second light-emitting section and a convex second exit surface curving away from the second incident surface, as described in any one of appendices 1 to 4, the light source module. (Note 7) The light source module according to Appendix 6, wherein in one of the second stacked layers, the optical axis of the second optical control unit is parallel to a second axis that passes through the center of the second emission surface and is perpendicular to the second incidence surface when viewed from above. (Note 8) In at least one of the second laminates, a cross section containing a second axis passing through the center of the second exit surface and perpendicular to the second incident surface in a top view includes a third cross section with different curvatures on both sides of the second exit surface with respect to the second axis. The light source module according to appendix 6 or 7, wherein in at least one of the second laminates, the optical axis of the second optical control unit is non-parallel to the second axis. (Note 9) The light source further includes a plurality of third light-emitting units, The optical control unit further includes a plurality of third optical control units, Each of the third light control units overlaps with one of the third light-emitting units, which are different from each other when viewed from above, to form a third laminate. The substrate has an intermediate region located between the central region and the outer peripheral region, and each of the third laminates is arranged in the intermediate region. In each of the third laminates, the third light control unit comprises a planar third incident surface facing the third light-emitting section and a convex third exit surface curving away from the third incident surface, and in a top view, the cross section including a third axis passing through the center of the third exit surface and perpendicular to the third incident surface includes a fourth cross section with different curvatures on both sides of the third exit surface with respect to the third axis. The light source module according to any one of appendices 6 to 8, wherein in at least one of the third stacks, the optical axis of the third optical control unit is non-parallel to the third axis. (Note 10) The light source module according to Appendix 9, wherein in at least one of the third laminates, the center of the light-emitting surface of the third light-emitting portion is located on the fourth cross-section when viewed from above. (Note 11) In each of the third laminates, the cross section including the third axis has the same curvature on both sides of the third exit surface with respect to the third axis, and includes a fifth cross section that is perpendicular to the fourth cross section. The light source module according to Appendix 9 or 10, wherein in at least one of the third laminates, in a top view, the extension of the fourth cross section passes through the central region, and in the fourth cross section, the curvature of the third emission surface located closer to the central region with respect to the third axis is smaller than the curvature of the third emission surface located further away from the central region with respect to the third axis. (Note 12) In all of the aforementioned third laminates, the optical axis of the third optical control unit is nonparallel to the third axis. In all of the third laminates, the cross-section including the third axis includes the fifth cross-section. The light source module according to Appendix 11, wherein in all of the third laminates, in a top view, the extension of the fourth cross section passes through the central region, and in the fourth cross section, the curvature of the third emission surface located closer to the central region with respect to the third axis is smaller than the curvature of the third emission surface located further away from the central region with respect to the third axis. (Note 13) The light source further includes one or more second light-emitting units, The optical control unit further includes one or more second optical control units, One or more of the second light control units overlap with one or more of the second light-emitting units in a top view, forming the same number of second laminates as the second light control units. Each of the second laminates is arranged in the central region, The light source module according to Appendix 5, wherein each of the second laminates comprises a second light control unit having a planar second incident surface facing the second light-emitting section and a convex second exit surface that curves away from the second incident surface. (Note 14) The light source further includes a plurality of third light-emitting units, The optical control unit further includes a plurality of third optical control units, Each of the third light control units overlaps with one of the third light-emitting units, which are different from each other when viewed from above, to form a third laminate. The substrate has an intermediate region located between the central region and the outer peripheral region, and each of the third laminates is arranged in the intermediate region. In each of the third laminates, the third light control unit comprises a planar third incident surface facing the third light-emitting section and a convex third exit surface curving away from the third incident surface, and in a top view, the cross section including a third axis passing through the center of the third exit surface and perpendicular to the third incident surface includes a fourth cross section with different curvatures on both sides of the third exit surface with respect to the third axis. The light source module according to Appendix 13, wherein in at least one of the third stacks, the optical axis of the third optical control unit is non-parallel to the third axis. (Note 15) In all of the aforementioned third laminates, the optical axis of the third optical control unit is nonparallel to the third axis. In all of the third laminates, the cross section including the third axis includes a fifth cross section perpendicular to the fourth cross section, where the curvature on both sides of the third exit surface is the same with respect to the third axis. The light source module according to Appendix 14, wherein in all of the third stacked bodies, in a top view, the fourth cross section is parallel to the first cross section, and in each of the fourth cross sections, the positional relationship between the side with greater curvature and the side with less curvature of the third emission surface with respect to the third axis is the same as the positional relationship between the side with greater curvature and the side with less curvature of the first emission surface with respect to the first axis in the first cross section. (Note 16) A light source module according to any one of appendices 1 to 15, which emits ultraviolet light from the optical element. (Note 17) A fluid-flow channel pipe, A fluid ultraviolet light processing apparatus comprising a light source module described in Appendix 16, which is capable of irradiating the flow channel tube with ultraviolet light emitted from the optical element. [Explanation of Symbols]

[0105] 1,1A,1B,1C Light Source Module 2.2A Fluid UV Light Processing Apparatus 10 circuit boards 10a Top 11 Wiring 12 connectors 20 light source 21 First light-emitting section 21a, 22a, 23a Light-emitting surface 21o,22o,23o center 22 Second light-emitting section 23 Third light-emitting section 30,30A Optical components 31 First Optical Control Unit 31a 1st entrance plane 31b 1st exit surface 31o,32o,33o center 31x 1st axis 31y,32y,33y optical axis 32 Second Optical Control Unit 32a 2nd entrance plane 32b Second exit surface 32x 2nd axis 33 Third Optical Control Unit 33a Third entrance plane 33b Third exit surface 33x 3rd axis 35 Optical Control Unit 40 Base 50 Fixing member 51 Fixed part 52 Spring section 60 Retaining member 70 Spring component 210 flow channel pipe 211 Inlet 212 Outlet 213 Flow channel section 213c central part 213o Upper part of the outer circumference 214 First connection section 214a,215a Light source arrangement part 215 Second connection section R1 central area R2 outer area R3 intermediate area S1 First Laminate S2 2nd laminate S3 Third Laminate

Claims

1. circuit board and A light source arranged on the upper surface of the substrate, It comprises an optical control unit and an optical member positioned above the substrate with the light source in between, The light source includes a plurality of first light-emitting units, The optical control unit includes a plurality of first optical control units, Each of the first light control units overlaps with one of the first light-emitting units, which are different from each other when viewed from above, to form a first laminate. The substrate has a central region and an outer peripheral region located outside the central region, and each of the first laminates is arranged in the outer peripheral region. In each of the first laminates, the first light control unit comprises a planar first incident surface facing the first light-emitting section and a convex first exit surface curving away from the first incident surface, and in a top view, the cross section including a first axis passing through the center of the first exit surface and perpendicular to the first incident surface includes a first cross section with different curvatures on both sides of the first exit surface with respect to the first axis. A light source module in which, in at least one of the first laminates, the optical axis of the first optical control unit is nonparallel to the first axis.

2. The light source module according to claim 1, wherein in at least one of the first laminates, the center of the light-emitting surface of the first light-emitting portion is located on the first cross-section when viewed from above.

3. In each of the first laminates, the cross section including the first axis includes a second cross section perpendicular to the first cross section, wherein the curvature on both sides of the first exit surface is the same with respect to the first axis. The light source module according to claim 1, wherein in at least one of the first laminates, in a top view, the extension of the first cross section passes through the central region, and in the first cross section, the curvature of the first emission surface located on the side closer to the central region with respect to the first axis is smaller than the curvature of the first emission surface located on the side further from the central region with respect to the first axis.

4. In all of the first laminates, the optical axis of the first optical control unit is non-parallel to the first axis. In all of the first laminates, the cross section including the first axis includes the second cross section. The light source module according to claim 3, wherein in all of the first laminates, in a top view, the extension of the first cross section passes through the central region, and in the first cross section, the curvature of the first emission surface located closer to the central region with respect to the first axis is smaller than the curvature of the first emission surface located further away from the central region with respect to the first axis.

5. In all of the first laminates, the optical axis of the first optical control unit is non-parallel to the first axis. In all of the first laminates, the cross section including the first axis includes a second cross section perpendicular to the first cross section, wherein the curvature on both sides of the first exit surface is the same with respect to the first axis. The light source module according to claim 1, wherein in all of the first laminates, the first cross-sections are parallel to each other when viewed from above, and in each first cross-section, the positional relationship between the side with a large curvature and the side with a small curvature of the first emission surface with respect to the first axis is the same.

6. The light source further includes one or more second light-emitting units, The optical control unit further includes one or more second optical control units, One or more of the second light control units overlap with one or more of the second light-emitting units in a top view, forming the same number of second laminates as the second light control units. Each of the second laminates is arranged in the central region, The light source module according to claim 1, wherein each of the second laminates comprises a second light control unit having a planar second incident surface facing the second light-emitting unit and a convex second exit surface that curves away from the second incident surface.

7. The light source module according to claim 6, wherein in one of the second laminates, the optical axis of the second light control unit is parallel to a second axis that passes through the center of the second emission surface and is perpendicular to the second incident surface when viewed from above.

8. In at least one of the second laminates, a cross section in a top view that includes a second axis passing through the center of the second exit surface and perpendicular to the second incident surface includes a third cross section with respect to the second axis, where the curvature on both sides of the second exit surface is different. The light source module according to claim 6, wherein in at least one of the second laminates, the optical axis of the second optical control unit is non-parallel to the second axis.

9. The light source further includes a plurality of third light-emitting units, The optical control unit further includes a plurality of third optical control units, Each of the third light control units overlaps with one of the third light-emitting units, which are different from each other when viewed from above, to form a third laminate. The substrate has an intermediate region located between the central region and the outer peripheral region, and each of the third laminates is arranged in the intermediate region. In each of the third laminates, the third light control unit comprises a planar third incident surface facing the third light-emitting section and a convex third exit surface curving away from the third incident surface, and in a top view, the cross section containing a third axis passing through the center of the third exit surface and perpendicular to the third incident surface includes a fourth cross section with different curvatures on both sides of the third exit surface with respect to the third axis. The light source module according to claim 6, wherein in at least one of the third laminates, the optical axis of the third optical control unit is non-parallel to the third axis.

10. The light source module according to claim 9, wherein in at least one of the third laminates, the center of the light-emitting surface of the third light-emitting portion is located on the fourth cross-section when viewed from above.

11. In each of the third laminates, the cross section including the third axis has the same curvature on both sides of the third exit surface with respect to the third axis, and includes a fifth cross section that is perpendicular to the fourth cross section. The light source module according to claim 9, wherein in at least one of the third laminates, in a top view, the extension of the fourth cross section passes through the central region, and in the fourth cross section, the curvature of the third emission surface located closer to the central region with respect to the third axis is smaller than the curvature of the third emission surface located further away from the central region with respect to the third axis.

12. In all of the above third laminates, the optical axis of the third optical control unit is non-parallel to the third axis. In all of the third laminates, the cross section including the third axis includes the fifth cross section. The light source module according to claim 11, wherein in all of the third laminates, in a top view, the extension of the fourth cross section passes through the central region, and in the fourth cross section, the curvature of the third emission surface located closer to the central region with respect to the third axis is smaller than the curvature of the third emission surface located further away from the central region with respect to the third axis.

13. The light source further includes one or more second light-emitting units, The optical control unit further includes one or more second optical control units, One or more of the second light control units overlap with one or more of the second light-emitting units in a top view, forming the same number of second laminates as the second light control units. Each of the second laminates is arranged in the central region, The light source module according to claim 5, wherein each of the second laminates comprises a second light control unit having a planar second incident surface facing the second light-emitting unit and a convex second exit surface curving away from the second incident surface.

14. The light source further includes a plurality of third light-emitting units, The optical control unit further includes a plurality of third optical control units, Each of the third light control units overlaps with one of the third light-emitting units, which are different from each other when viewed from above, to form a third laminate. The substrate has an intermediate region located between the central region and the outer peripheral region, and each of the third laminates is arranged in the intermediate region. In each of the third laminates, the third light control unit comprises a planar third incident surface facing the third light-emitting section and a convex third exit surface curving away from the third incident surface, and in a top view, the cross section containing a third axis passing through the center of the third exit surface and perpendicular to the third incident surface includes a fourth cross section with different curvatures on both sides of the third exit surface with respect to the third axis. The light source module according to claim 13, wherein in at least one of the third laminates, the optical axis of the third optical control unit is non-parallel to the third axis.

15. In all of the above third laminates, the optical axis of the third optical control unit is non-parallel to the third axis. In all of the third laminates, the cross section including the third axis has the same curvature on both sides of the third exit surface with respect to the third axis, and includes a fifth cross section perpendicular to the fourth cross section. The light source module according to claim 14, wherein in all of the third laminates, in a top view, the fourth cross section is parallel to the first cross section, and in each of the fourth cross sections, the positional relationship between the side with greater curvature and the side with less curvature of the third emission surface with respect to the third axis is the same as the positional relationship between the side with greater curvature and the side with less curvature of the first emission surface with respect to the first axis in the first cross section.

16. A light source module according to any one of claims 1 to 15, wherein ultraviolet light is emitted from the optical member.

17. A fluid-flow channel pipe, A fluid ultraviolet light processing apparatus comprising a light source module according to claim 16, which is capable of irradiating the flow channel tube with ultraviolet light emitted from the optical member.

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