Illumination device

Abstract

Provided is a light irradiation device capable of marking the irradiation direction of light. The light irradiation device is a long strip-shaped light irradiation device having a long side direction, and includes: a light exit portion; and a marker member directly or indirectly connected to the light exit portion and having radio-opacity, at least one of the shape and position of the marker member as viewed in a first direction in a direction orthogonal to the long side direction being different from the marker member as viewed in a second direction in the direction orthogonal to the long side direction different from the first direction, and capable of irradiating light emitted from the light exit portion in a predetermined direction intersecting the long side direction.

Description

Technical Field

[0001] This disclosure relates to a lighting device. Background Technology

[0002] For example, Patent Document 1 discloses a light irradiation device that includes a marker portion that is radiopaque and can selectively irradiate light at specific locations within a biological cavity.

[0003] <Prior art documents>

[0004] <Patent Documents>

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-185259 Summary of the Invention

[0006] <Problem to be solved by this invention>

[0007] According to one aspect of this disclosure, the object is to provide a lighting device capable of marking the direction of light illumination.

[0008] <Methods for solving problems>

[0009] In one embodiment, the illumination device is an elongated illumination device having a long side direction, comprising: a light emitting part; a marking member directly or indirectly connected to the light emitting part and having radiation opacity, wherein the marking member observed along a first direction orthogonal to the long side direction has at least one different shape and position than the marking member observed along a second direction orthogonal to the long side direction but different from the first direction, and is capable of illuminating light emitted from the light emitting part along a predetermined direction intersecting the long side direction.

[0010] In one embodiment, the illumination device is an elongated illumination device having a long side direction, comprising: a light emitting part; a support body on which the light emitting part is fixed; and a marking part having radiopaque properties. The marking part, when viewed along a first direction orthogonal to the long side direction, differs from the marking part when viewed along a second direction orthogonal to the long side direction but different from the first direction. The marking part is disposed on the support body and is capable of irradiating light emitted from the light emitting part along a predetermined direction intersecting the long side direction.

[0011] <The Effects of the Invention>

[0012] A lighting device is provided that can mark the direction of light illumination. Attached Figure Description

[0013] Figure 1This is a schematic perspective view showing a structural example of the illumination device according to the first embodiment.

[0014] Figure 2A This is a schematic cross-sectional view showing a first example of the structure of the illumination device according to the first embodiment.

[0015] Figure 2B This is a schematic cross-sectional view showing a second example of the structure of the illumination device according to the first embodiment.

[0016] Figure 3A This is a diagram showing the marking components of the illumination device of the first embodiment viewed along the first direction.

[0017] Figure 3B This is a diagram showing the marking components of the illumination device of the first embodiment viewed along the second direction.

[0018] Figure 4A This is a schematic cross-sectional view showing a structural example of the illumination device according to the second embodiment.

[0019] Figure 4B This is a schematic bottom view showing a structural example of the illumination device according to the second embodiment.

[0020] Figure 5 This illustrates a lighting device with its central axis, parallel to its long side, as the axis of rotation, causing the lighting device to rotate from... Figure 4A A schematic cross-sectional view of the state after rotating 180 degrees.

[0021] Figure 6 This is a schematic cross-sectional view showing a structural example of the illumination device according to the third embodiment.

[0022] Figure 7 This is a schematic cross-sectional view showing a structural example of the illumination device according to the fourth embodiment.

[0023] Figure 8A This is a schematic cross-sectional view showing a structural example of the illumination device according to the fifth embodiment.

[0024] Figure 8B This is a schematic bottom view showing a structural example of the illumination device according to the fifth embodiment.

[0025] Figure 9 This is a schematic cross-sectional view showing a structural example of the illumination device according to the sixth embodiment.

[0026] Figure 10 This is a schematic perspective view showing a structural example of the illumination device according to the seventh embodiment.

[0027] Figure 11 This is a diagram illustrating an example of an in vivo light irradiation component using the light irradiation device of the eighth embodiment.

[0028] Figure 12A This is a schematic diagram showing a structural example of the illumination device according to the eighth embodiment.

[0029] Figure 12B This is a schematic diagram showing another structural example of the illumination device according to the eighth embodiment.

[0030] Figure 13 This is a perspective view of the main body of the lighting device before it is sealed with an insulating layer.

[0031] Figure 14 This is a schematic diagram of a light-emitting element mounted on a support.

[0032] Figure 15 This is a schematic diagram showing an example of a stacked structure of a support and a light-emitting element.

[0033] Figure 16 This is a diagram illustrating an example of an in vivo light irradiation component using the light irradiation device of the 9th embodiment.

[0034] Figure 17 This is a diagram showing an example of the arrangement of optical elements in the illumination device according to the ninth embodiment.

[0035] Figure 18 This is a schematic diagram of the illumination device according to the 10th embodiment.

[0036] Figure 19 This is a schematic diagram showing an example of the light-emitting element used in the 10th embodiment.

[0037] Figure 20A This is a perspective view of the light-emitting element mounting surface of the support used in the 10th embodiment.

[0038] Figure 20B This is a perspective view of the back side of the support used in the 10th embodiment.

[0039] Figure 21 This is a diagram illustrating the electrical and light output characteristics of the illumination device according to an embodiment.

[0040] Figure 22 This is a diagram showing the thermal resistance of the illumination device according to an embodiment.

[0041] Figure 23 This is a schematic cross-sectional view showing the structure of the first example of the illumination device according to the 11th embodiment.

[0042] Figure 24 This is a schematic cross-sectional view showing a second example of the structure of the illumination device according to the 11th embodiment.

[0043] Figure 25This is a schematic cross-sectional view showing the structure of the illumination device according to the 11th embodiment, which is a third example. Detailed Implementation

[0044] Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. The following description is intended to concretize the technical concept of this disclosure; unless otherwise specified, this disclosure is not limited to the following description. In the various drawings, components with the same function are sometimes labeled with the same reference numerals. For ease of explanation and understanding, descriptions are sometimes divided into embodiments, but partial substitutions or combinations of structures shown in different embodiments or examples are also possible. In the embodiments described below, mainly matters different from those described in the previous embodiments will be explained, while matters identical to those described in the previous embodiments will be omitted from repeated description. To clearly illustrate the size and positional relationships of the components shown in the various drawings, sometimes exaggerated representations are used.

[0045] (First Embodiment)

[0046] Reference Figure 1 , Figure 2A , Figure 2B , Figure 3A as well as Figure 3B The structure of the light irradiation device according to the first embodiment will be described. The light irradiation device 10C is inserted into a conduit, for example, and introduced into a biological body. The light irradiation device 10C utilizes the conduit to be inserted near the target site such as a diseased area in the biological body, thereby enabling direct light irradiation, diagnosis, sensing, etc., of the diseased area such as a tumor to examine or confirm the target site. Figure 1 This is a schematic perspective view showing an example of the structure of the illumination device 10C according to the first embodiment. Figure 2A This is a schematic cross-sectional view showing the first example of the structure of the illumination device 10C. Figure 2B This is a schematic cross-sectional view showing the structure of the second example of the illumination device 10C. Figure 2A and Figure 2B A cross-section of an elongated lighting device 10C with a long side direction P is shown, including a central axis C0 along the long side direction P. Figure 3A Observed in the first direction Q1 Figure 1 and Figure 2A The diagram shows the marking component 20A of the illumination device 10C shown. Figure 3B It is observed in the second direction Q2. Figure 1 and Figure 2A The diagram shows the marking component 20A of the illumination device 10C shown.

[0047] The central axis C0 refers to the axis that passes through the center of the cross-section of the illumination device 10C, which is orthogonal to the axis parallel to the long side direction P, and is parallel to the long side direction P. Here, the center refers to the center of the circumcircle when the illumination device 10C is observed in the +Z direction. Figure 2A In the example shown, the lighting device 10C has a generally cuboid shape with the long side P as its long side, formed by the combination of a frame 30A and a marking component 20A. Figure 2A In the example shown, the cross-sectional shape of the lighting device 10C, orthogonal to the axis parallel to the long side direction P, is approximately rectangular. Figure 2A In the example shown, the center of the cross-section of the lighting device 10C, orthogonal to the axis parallel to the long side direction P, is the center of the cross-section of the cuboid orthogonal to the axis parallel to the long side direction P. However, the cross-sectional shape of the lighting device 10C, orthogonal to the axis parallel to the long side direction P, is not limited to a generally rectangular shape and can be any shape. The center of the cross-section of the lighting device 10C, orthogonal to the axis parallel to the long side direction P, can also be the approximate center of any shape orthogonal to the axis parallel to the long side direction P.

[0048] like Figure 1 and Figure 2A As shown, the illumination device 10C includes a light emitting section 60 and a marking component 20A that is directly or indirectly connected to the light emitting section 60 and has radiopaque characteristics. Figure 3A and Figure 3B As shown, the marking member 20A observed along a first direction Q1, which is orthogonal to the long side direction P, differs in at least one aspect in shape and position from the marking member 20A observed along a second direction Q2, which is different from the first direction Q1 and is orthogonal to the long side direction P. The illumination device 10C is capable of illuminating light emitted from the light-emitting element 11 along a predetermined direction R intersecting the long side direction P.

[0049] For example, in a light irradiation device used for medical purposes, it is sometimes necessary to determine the direction of light irradiation from the device while it is positioned within the organism for the purpose of directing light onto a targeted portion of the body. The light irradiation device 10C includes a marking component 20A, which is opaque to radiation such as X-rays, and its shape and position differ at least one of the following when viewed in a first direction Q1 and when viewed in a second direction Q2. Furthermore, the components of the light irradiation device 10C other than the marking component 20A are transmissive to radiation. Therefore, when an X-ray CT (Computed Tomography) image is taken of a organism in which the light irradiation device 10C is internally located, the image of the marking component 20A can be identified in the photographic image. By confirming at least one of the shape and position of the image of the marking component 20A reflected in the X-ray CT image, the orientation of the marking component 20A positioned within the organism can be determined. The orientation of the marking member 20A is known relative to the long side direction P, and the illumination device 10C can illuminate the light emitted from the light-emitting element 11 in a predetermined direction R intersecting the long side direction P. Therefore, in this embodiment, by using the illumination device 10C, the illumination direction of the light from the illumination device 10C can be determined based on the orientation of the marking member 20A as confirmed in the X-ray CT image. From another perspective, by providing the marking member 20A, the illumination device 10C can mark the illumination direction of the light from the illumination device 10C using X-ray CT or the like. In this embodiment, an illumination device 10C capable of marking the illumination direction can be provided.

[0050] Here, "at least one difference in shape and position" means that it is sufficient for a visual difference, not necessarily a difference in the radiographic image under radiation. In the radiographic image under radiation, the difference is considered when viewed from above (e.g., the +Y side) and from below (e.g., the -Y side). Figure 1 and Figure 2A The shape and position of the marker components 20A shown are all identical. Therefore, the direction of light irradiation from the illumination device 10C cannot be determined solely from this image. However, since the shape and position of the marker components 20A differ at least once under visual observation, a slight change in the viewing direction will result in a change in the radiographic image under radiation, thus allowing determination of whether it is above or below.

[0051] Figure 3A and Figure 3BThe marking member 20A shown includes an elongated base 21 and a protrusion 22 provided on the surface of the base 21. Therefore, it is possible to provide marking members 20A with different shapes in the first direction Q1 and the second direction Q2. The marking member 20A may be made of a metallic material such as platinum that is opaque to radiation.

[0052] The marking member 20A is not limited to the protrusion 22; at least one of the protrusion and the recess may also be provided on the surface of the base 21. Furthermore, the marking member 20A is not limited to a member having at least one of the base 21 and the protrusion and the recess; it can be a member with at least one different shape and position in the first direction Q1 and the second direction Q2, and members of various shapes can be used. One or more parts of the marking member 20A may also be configured separately from the other parts.

[0053] exist Figure 1 and Figure 2A In the example shown, the light emitting section 60 includes a light-emitting element 11 and a support 12 supporting the light-emitting element 11. The support 12 is disposed on the upper surface (e.g., the +Y side surface) of the base 21 of the marking member 20A. The light-emitting element 11 is disposed on the upper surface of the support 12. The light-emitting element 11 is capable of emitting light from the light emitting surface 111 intersecting the long side direction P, in a direction along the long side direction P. Figure 1 In the example shown, the light-emitting element 11 emits light in the +Z direction. Since the light-emitting part 60 in the illumination device 10C includes the light-emitting element 11 and the support 12, the support 12 can be used as a heat dissipation component to release the heat of the light-emitting element 11.

[0054] In addition, Figure 1 and Figure 2A In the example shown, the lighting device 10C includes an optical component 40 that directs the light emitted by the light-emitting element 11 in the direction along the long side direction P to a direction R that intersects the long side direction P. Figure 1 and Figure 2A In the example shown, the optical component 40 is a prism disposed on the upper surface of the support 12, which includes a reflecting surface 41 intersecting the upper surface of the support 12. The optical component 40 reflects the light emitted from the light-emitting element 11 through the reflecting surface 41, directing the light in direction R. Here, the optical component 40 is not limited to a prism; it can be a mirror, lens, or diffractive optical element, etc., as long as it can direct the light in a predetermined direction. The optical component 40 can be constructed from materials such as resin, glass, or metal. Figure 2B As shown, the optical component 40 can be integrally formed with the support 12.

[0055] exist Figure 2AIn the example shown, the entire surface of the light-emitting element 11 is covered with an insulating layer 16. Therefore, it is possible to prevent a short circuit between the marking member 20A and the light-emitting element 11 via the support 12, which could lead to damage to the light-emitting element 11. Furthermore, in the illumination device 10C, it is not limited to the entire surface of the light-emitting element 11; at least one of the light-emitting element 11 and the support 12 may be covered with an insulating layer. By covering at least one of the light-emitting element 11 and the support 12 with an insulating layer, it is possible to prevent damage to the light-emitting element 11 caused by a short circuit between the marking member 20A and the light-emitting element 11.

[0056] exist Figure 1 and Figure 2A In the example shown, the lighting device 10C has an insulated wire 14 electrically connected to the light-emitting element 11, and the insulated wire 14 is electrically insulated from the marking member 20A. As described above, the insulated wire 14 includes a first insulated wire 14a and a second insulated wire 14b. Because the lighting device 10C has an insulated wire 14 electrically connected to the light-emitting element 11, damage to the light-emitting element 11 caused by a short circuit through the marking member 20A can be prevented.

[0057] exist Figure 1 and Figure 2A In the example shown, the illumination device 10C includes a frame 30A and a light-transmitting component 32. The frame 30A has an opening 31A, and at least a portion of the light-emitting element 11 and at least a portion of the support 12 can be disposed inside it. The light-transmitting component 32 seals the opening 31A of the frame 30A. The light-transmitting component 32 allows light emitted from the light-emitting portion 60 and irradiated along a predetermined direction R intersecting the long side direction P to be transmitted. With this structure, the illumination device 10C can irradiate light from the light-emitting element 11 disposed inside the frame 30A through the light-transmitting component 32. Furthermore, by sealing the opening 31A by the light-transmitting component 32, the interior of the frame 30A can be reduced from being exposed to the outside. The frame 30A may be made of a resin material or a metal material that has light-shielding or absorptive properties for the peak wavelength of the light emitted by the light-emitting element 11. The light-transmitting component 32 may be made of a resin material or a glass material that is transparent for the peak wavelength of the light emitted by the light-emitting element 11.

[0058] In addition, Figure 1 and Figure 2A In the example shown, the light-emitting element 11 is disposed inside the frame 30A, and the inside of the frame 30A is airtight. Therefore, even when the illumination device 10C is disposed inside a biological cavity containing liquids such as blood, liquid can be prevented from entering the interior of the frame 30A, thereby preventing damage to the light-emitting element due to a short circuit caused by the liquid.

[0059] The materials used for the support 12, the light-emitting element 11, the optical component 40, and the insulated wire 14, etc., can be the same as those used in the 8th to 10th embodiments described later, and the same applies to the 2nd to 7th embodiments. Figure 2B In the example shown, where the support 12 and the optical component 40 are integrally formed, the same material can be used for integral forming. For its high thermal conductivity, aluminum nitride (AlN) can be included as the main component. As an example of a method for integrally forming the support 12 and the optical component 40, injection molding or stamping of a ceramic green plate can be used.

[0060] (Second Implementation)

[0061] Reference Figure 4A , Figure 4B as well as Figure 5 The structure of the illumination device in the second embodiment will be explained below. Figure 4A This is a schematic cross-sectional view showing an example of the structure of the illumination device 10D according to the second embodiment. Figure 4B This is a schematic bottom view showing an example of the structure of the lighting device 10D. Figure 5 This illustrates how the lighting device 10D rotates from its central axis C0, which is parallel to the long side direction P, to its central axis C0. Figure 4A The diagram shows a schematic cross-sectional view of the state after being rotated 180 degrees. Furthermore, Figure 4A and Figure 5 A cross-section of a strip-shaped illumination device 10D with a long side direction P, including a central axis C0 along the long side direction P, is shown.

[0062] like Figure 4A , Figure 4B and Figure 5 As shown, the illumination device 10D includes a light-emitting element 11, a support 12 on which the light-emitting element 11 is fixed, and a marking portion 20D that is radiopaque. The marking portion 20D observed along a first direction Q1, orthogonal to the long side direction P, differs from the marking portion 20D observed along a second direction Q2, orthogonal to the long side direction P but different from the first direction Q1, in at least one aspect of shape and position. The marking portion 20D is disposed on the support 12. The illumination device 10D is capable of illuminating light emitted from the light-emitting element 11 in a predetermined direction R intersecting the long side direction. In this embodiment, the light-emitting element 11 is an example of a light-emitting portion 60. Figure 4A In this diagram, to indicate that the light-emitting element 11 and the light-emitting section 60 are the same, the symbols for the light-emitting element 11 and the light-emitting section 60 are shown together. In the following figures, the symbols are also shown together for the same purpose.

[0063] In this embodiment, by including the marking part 20D, similar to the first embodiment described above, the irradiation direction of light from the illumination device 10D can be marked using X-ray CT or the like, thereby providing an illumination device 10C capable of marking the irradiation direction of light. Furthermore, in this embodiment, since the marking part 20D is provided on the support 12, the structure of the illumination device can be simplified compared to the case where a component functioning as the marking part is provided outside the support 12. Here, the marking part 20D is fixed to the support 12 and can move integrally with the support 12. Similarly, in this embodiment, "at least one difference in shape and position" means that it is sufficient for a difference to be visually apparent, and it is not required that there be a difference in the radiographic image under radiation. In the radiographic image under radiation, Figure 4A , Figure 4B , Figure 5 The marked portion 20D shown has the same shape and position when viewed from above (e.g., the +Y side) and from below (e.g., the -Y side). Therefore, the direction of light provided by the illumination device 10D cannot be determined solely from this image. However, since the shape and position of the marked portion 20D differ at least once when viewed visually, the shape will change in the photographic image under radiation if the viewing direction is slightly changed, thus allowing determination of whether it is above or below.

[0064] exist Figure 4A , Figure 4B and Figure 5 In the example shown, the support 12 includes a first surface 12a on which the light-emitting element 11 is disposed, and a second surface 12b located on the opposite side of the first surface 12a. A marking portion 20D is provided on the second surface 12b of the support 12. According to this structure, in the illumination device 10D, by providing a marking portion 20D on the second surface 12b, which is opposite to the first surface 12a used for disposing of the light-emitting element 11, an area on the support 12 can be effectively utilized. The marking portion 20D on the first surface 12a is anisotropic when viewed from a direction parallel or perpendicular to the first surface 12a, and the marking portion 20D on the second surface 12b can be anisotropic in a direction different from that of the first surface 12a. Furthermore, the anisotropy of the marking portion 20D refers to at least one different property in the shape and position of the marking portion 20D.

[0065] Furthermore, in the illumination device 10D, the marking portion 20D is made of a metallic material, and at least a portion of the marking portion 20D has a thickness of 20 μm or more and 100 μm or less. Figure 4A , Figure 4B and Figure 5In the example shown, the marking portion 20D is a plate-shaped component with a thickness t1. The thickness t1 is 20 μm or more and 100 μm or less. By setting the thickness of at least a portion of the marking portion 20D to 40 μm or more, the recognizability in radiographic images under radiation can be improved, and therefore it is preferable. In addition, by setting it to 100 μm or less, miniaturization can be achieved.

[0066] Platinum or similar metals can be used as the metallic material constituting the marking portion 20D. The marking portion 20D is formed by plating platinum or similar metals onto the second surface 12b of the support 12. However, the marking portion 20D is not limited to a portion provided on a part of other components such as the support 12. The marking portion 20D can also be a component independent of other components, which is joined to other components such as the support 12 by adhesive components or the like.

[0067] In the illumination device 10D, the position of the mark portion 20D observed along the third direction Q3, which is parallel to the first surface 12a, is more than twice the distance t2 between the first surface 12a and the second surface 12b in the support body 12, relative to the position of the mark portion 20D observed along the third direction Q3 after rotating the illumination device 10D 180 degrees with the central axis C0 of the illumination device 10D parallel to the long side direction P as the rotation axis. Figure 4A The first position 20v shown indicates the position of the mark portion 20D as observed along a third direction Q3, which is parallel to the first surface 12a. On the other hand, Figure 5 The second position 20u shown represents the position of the mark 20D as observed along the third direction Q3 after rotating the illumination device 10D 180 degrees with the central axis C0 parallel to the long side direction P as the rotation axis. For comparison with the first position 20v, Figure 4A The second position 20u shown is represented hypothetically. Figure 5 The second position 20u is shown in the state. The distance d between the first position 20v and the second position 20u is more than twice the distance t2. According to this structure, it is easier to distinguish the difference in position of the marker 20D corresponding to the observation direction. Since it is easier to distinguish the difference in position of the marker 20D corresponding to the observation direction, in this embodiment, the direction of light irradiated from the illumination device 10D can be marked by the marker 20D in a manner that is easy to distinguish, such as X-ray CT.

[0068] In the lighting device 10D, the light emitting part is the light-emitting element 11. The light-emitting element 11 is disposed on the support body 12. According to this structure, the lighting device 10D can have a light source, thus making it easy to perform position control of the lighting device 10D, etc.

[0069] exist Figure 4A , Figure 4B and Figure 5 In the example shown, the optical component 40 of the illumination device 10D is mounted on the support 12.

[0070] (Third Implementation)

[0071] Reference Figure 6 The structure of the illumination device in the third embodiment will be explained. Figure 6 This is a schematic cross-sectional view showing an example of the structure of the illumination device 10E according to the third embodiment. Figure 6 A cross-section of a strip-shaped illumination device 10E with a long side direction P is shown, including the central axis C0 along the long side direction P.

[0072] In the illumination device 10E, marking portions 20D are provided on both the first surface 12a and the second surface 12b. The marking portions 20D on the first surface 12a differ from those on the second surface 12b in at least one of size and position. This structure makes it easier to determine the difference in position of the marking portions 20D corresponding to the observation direction, thus allowing for easy marking of the direction of light irradiated from the illumination device 10E using methods such as X-ray CT.

[0073] exist Figure 6 In the example shown, the marking portion 20D includes a first marking portion 20Da and a second marking portion 20Db. The first marking portion 20Da is disposed parallel to the light-emitting element 11 on the first surface 12a in the direction along the long side direction P. The second marking portion 20Db is disposed on the second surface 12b. The first marking portion 20Da is disposed at a position offset relative to the second marking portion 20Db in the long side direction P. Furthermore, the first marking portion 20Da is smaller than the second marking portion 20Db. In other words, the size and position of the marking portion 20D are different compared to the second marking portion 20Db. In this embodiment, "at least one of the shape and position is different" means that it is sufficient for them to be different visually, and it is not required that they be different in a radiographic image under radiation. In a radiographic image under radiation, Figure 6The marked portion 20D shown has the same shape and position when viewed from above (e.g., the +Y side) and from below (e.g., the -Y side). Therefore, the direction of light emitted by the illumination device 10E cannot be determined solely from this image. However, at least one of the shape and position of the marked portion 20D differs when viewed visually. Therefore, by slightly changing the viewing direction, it will change in the photographic image under radiation, thus allowing determination of whether it is above or below. Furthermore, the situation where the two directions differ visually but are the same in the photographic image under radiation is also the same in the fourth to seventh embodiments described later, and therefore, this will be omitted from the description in the fourth to seventh embodiments.

[0074] (Fourth implementation)

[0075] Reference Figure 7 The structure of the illumination device in the fourth embodiment will be explained. Figure 7 This is a schematic cross-sectional view showing an example of the structure of the illumination device 10F according to the fourth embodiment. Figure 7 A cross-section of a strip-shaped illumination device 10F with a long side direction P is shown, including the central axis C0 along the long side direction P.

[0076] In the illumination device 10F, the light emitting part is an optical fiber 18. The optical fiber 18 is disposed on the support body 12. According to this structure, the illumination device 10F can guide light from a remotely positioned light source, thus eliminating the need to place the light source inside the illumination device. Since no light source is provided in the illumination device 10F, the structure of the light emitting part 60 of the illumination device 10F can be simplified.

[0077] (Fifth Embodiment)

[0078] Reference Figure 8A and Figure 8B The structure of the illumination device in the fifth embodiment will be explained. Figure 8A This is a schematic cross-sectional view showing an example of the structure of the illumination device 10G according to the fifth embodiment. Figure 8A A cross-section of a strip-shaped illumination device 10G with a long side direction P is shown, including the central axis C0 along the long side direction P. Figure 8B This is a schematic bottom view showing an example of the structure of the lighting device 10G.

[0079] like Figure 8B As shown, in the lighting device 10G, the second surface 12b of the support 12 includes a first region 12b1 and a second region 12b2 different from the first region 12b1. A marking portion 20D is provided in the first region 12b1, and an insulated wire 14 is disposed in the second region 12b2. Figure 8A and Figure 8BIn the example shown, a second insulated wire 14b is configured in the second region 12b2.

[0080] In the illumination device 10G, compared with the case where the insulated wire 14 is arranged on the marking part 20D provided on the second surface 12b, the thickness of the illumination device 10G can be reduced by arranging the insulated wire 14 at the same time as the marking part 20D is provided on the second surface 12b of the support body 12.

[0081] (Sixth Embodiment)

[0082] Reference Figure 9 The structure of the illumination device in the sixth embodiment will be explained. Figure 9 This is a schematic cross-sectional view showing an example of the structure of the illumination device 10H according to the sixth embodiment. Figure 9 A cross-section of a strip-shaped illumination device 10H with a long side direction P is shown, including the central axis C0 along the long side direction P.

[0083] The illumination device 10H includes an optical component 40 that applies at least one of the optical effects of reflection, refraction and diffraction to the light emitted from the light emitting section 60, and the main difference from the embodiments described above is that the marking section 20D is provided on the optical component 40.

[0084] In the illumination device 10H, the light emitting unit 60 emits light in a direction along its long side direction P, and the optical component 40 includes a reflective surface 41 that reflects the light from the light emitting unit 60 in a direction intersecting the long side direction P. The marking unit 20D is provided in a region of the optical component 40 outside the region where the reflective surface 41 is provided. Figure 9 In the example shown, the optical component 40 is disposed on the upper surface of the support 12. The optical component 40 is a prism including a reflecting surface 41 and a surface 42 located on the opposite side of the reflecting surface 41. A marking portion 20D is provided on the surface 42 of the optical component 40. In the illumination device 10H, by providing the marking portion 20D in the optical component 40, the structure of the illumination device can be simplified. However, the marking portion 20D may also be provided on the side of the optical component 40 that intersects with the surface 42, for example, at least one of the +X side surface and the -X side surface of the optical component 40.

[0085] (Seventh Embodiment)

[0086] The following is for reference Figure 10 The structure of the illumination device in the seventh embodiment will be explained. Figure 10 This is a schematic perspective view showing an example of the structure of the illumination device 10J according to the seventh embodiment.

[0087] In addition to the marking part 20D, the illumination device 10J also has a second marking part 20J in the portion other than the support body 12 and the optical component 40. Figure 10 In the example shown, the illumination device 10J includes a marking portion 20D disposed on the support 12 and a second marking portion 20J disposed on the opposite side of the optical component 40, passing through the light emitting portion 60. The second marking portion 20J is a cylindrical component capable of housing the insulated wire 14 inside it. However, the shape of the second marking portion 20J is not limited to cylindrical and can be any shape.

[0088] In the illumination device 10J, by including the second marker 20J, the marker portion reflected in the X-ray CT image can be enlarged compared to the case where only the marker portion 20D is provided. This improves the recognizability of the marker portion, thereby providing an illumination device 10J where the position of the illumination device 10J can be easily confirmed. On the other hand, when only the marker portion 20D is provided without the second marker portion 20J, the correct position and orientation can be confirmed by the marker portion 20D. Therefore, an illumination device 10J that can accurately mark the direction of light illumination can be provided.

[0089] Hereinafter, embodiments 8 to 10 will be described. Although embodiments 8 to 10 describe examples without a marking member or marking part, the lighting apparatus described in embodiments 8 to 10 may also include the marking member or marking part described in embodiments 1 to 7.

[0090] (Eighth Embodiment)

[0091] Figure 11 This figure shows an example of an in vivo light irradiation assembly 100 using the light irradiation device 10 of the eighth embodiment. The in vivo light irradiation assembly 100 includes a conduit 50 and a light irradiation device 10 inserted into the conduit 50, and the conduit 50 is filled with a refrigerant 51 at least during use. The in vivo light irradiation assembly 100 is used for treatment, diagnosis, sensing, etc. The light irradiation device 10 is inserted into the conduit 50, for example, in the direction indicated by the white arrow in the figure, and introduced into the body. Since the light irradiation device 10 is a heating element, a refrigerant 51 is supplied into the conduit 50 for use in a state where the heating part is cooled. Therefore, the front end side of the light irradiation device 10 is integrally covered by an insulating layer 16. The refrigerant 51 is, for example, saline, blood, lymph, etc., and the refrigerant temperature is, for example, between 10°C and 36°C. The light irradiation device 10 is inserted into the vicinity of the irradiation target area, such as the affected area, within the body using a conduit 50. Therefore, it can directly irradiate the affected area, such as the tumor, without the need for optical fiber, to examine and confirm the target area for diagnosis, sensing, etc.

[0092] Figure 12A and Figure 12B It is shown Figure 1 A schematic diagram of the structure of the illumination device 10 of the eighth embodiment shown. Figure 12A Illumination device 10A and Figure 12B The lighting device 10B also uses an insulating layer to integrally cover the light-emitting element, a support for mounting the light-emitting element, and an insulated wire electrically connected to the light-emitting element, but the covering state of the insulating layer is different. Figure 12A and Figure 12B In the coordinate system, the optical axis direction is set as the Z direction, the mounting direction of the light-emitting element on the support is set as the Y direction, and the direction orthogonal to the Z and Y directions is set as the X direction. Figure 12A The illumination device 10A includes: a light-emitting element 11 that emits light of a predetermined wavelength; an optical component 17 that directs the light emitted from the light-emitting element 11 into the light source; a support 12 that mounts the light-emitting element 11 and the optical component 17; an insulated wire 14 electrically connected to the light-emitting element 11; and an insulating layer 16A that integrally covers the outer surface of the structure including the light-emitting element 11, the optical component 17, the support 12, and the insulated wire 14. The insulating layer 16A is, for example, a siliconized coating formed by coating a polysilazane solution (hereinafter referred to as a polysilazane coating), and is transparent to light emitted from the light-emitting element 11. By employing a polysilazane coating, the thickness of the insulating layer can be reduced to improve heat dissipation while ensuring insulation. The light-emitting surface 111 of the light-emitting element 11 and the light-incident surface 171 of the optical component 17 are positioned opposite each other across a space 13. Light emitted from the light emitting surface 111 passes through the insulating layer 16A, the space 13, and the insulating layer 16A, and enters the light incident surface 171 of the optical component 17. Figure 12A The insulating layer 16A seals the stacked structure along the surface shape of the support 12 and the light-emitting element 11 and other components mounted on the support 12.

[0093] In this structural example, the long side of the support 12 is parallel to the Z-direction. The illumination device 10 of the eighth embodiment is inserted into the conduit 50 along the +Z direction, and the insulated wires 14, including the first insulated wire 14a and the second insulated wire 14b, extend along the -Z direction. The support 12 is formed of insulating materials such as silicon (Si), aluminum nitride (AlN), silicon nitride (SiN), alumina (Al2O3), glass, quartz, and ceramic, and preferably a material with a thermal conductivity of 100 W / m·K or higher. Furthermore, it is not limited to insulating materials; metal materials such as copper or resin materials can also be used. When using metal materials, appropriate insulation treatment is performed to prevent short circuits, etc. A light-emitting element 11 is mounted on the light-emitting element mounting surface 121 of the support 12.

[0094] Along with the light-emitting element 11, an optical component 17 is mounted on the light-emitting element mounting surface 121 of the support 12, and the light-incident surface 171 of the optical component 17 is inclined relative to the light-emitting element mounting surface 121. Thus, the light-incident surface 171 of the optical component 17 functions as a reflective surface, extracting the output light Lout of the illumination device 10A in the direction of the dashed arrow. Figure 12A In this structural example, the optical component 17 is a reflective component that guides the light emitted from the light-emitting element 11 in a direction intersecting with the light-emitting element mounting surface 121 of the support 12 (e.g., the +Y direction). This allows light to be emitted in the circumferential direction of the illumination device. The optical component 17 can also be a mirror that reflects light incident on the light incident surface 171. The mirror may have a reflective layer of metal and / or dielectric multilayer film. Therefore, it can reflect light efficiently.

[0095] The insulated wire 14 includes a first insulated wire 14a and a second insulated wire 14b. The first insulated wire 14a is electrically connected to one electrode (also called the first electrode) of the light-emitting element 11 on the side of the light-emitting element mounting surface 121, which is the first surface of the support 12 for mounting the light-emitting element 11. The second insulated wire 14b is electrically connected to the other electrode (also called the second electrode) of the light-emitting element 11 on the side of the back surface 122 (also called the second surface), opposite to the light-emitting element mounting surface 121. By using the insulated wires, it is possible to energize the light-emitting element 11. As one of the features of the illumination device 10A, the electrical connection between the first insulated wire 14a and the second insulated wire 14b and the light-emitting element 11 is integrally sealed with an insulating layer 16A together with the support 12, the light-emitting element 11, and the optical component 17. The thickness of the insulating layer 16A is thinner than the thickness of the light-emitting element 11. By using an insulating layer 16 that is thinner than the light-emitting element 11 to integrally cover the illumination device 10A, a compact illumination device 10A that ensures electrical insulation is achieved, making it easier to insert into the conduit 50. Furthermore, by making the thickness of the insulating layer 16A thinner than the thickness of the light-emitting element, the thermal resistance of the insulating layer 16 can be reduced, and heat dissipation can be improved.

[0096] The width of the support 12 in the X direction is such that it can be easily inserted into the conduit 50, but from the viewpoint of increasing the cooling area (i.e., heat dissipation area) of the refrigerant 51, it can be set to be as wide as possible within the range where it can be smoothly inserted into the conduit 50. The thickness of the support 12 in the Y direction is such that it can stably support the light-emitting element 11 and can be smoothly inserted into the conduit 50 with the light-emitting element 11 installed. As an example, the thickness of the support 12 is about 0.075 mm to 0.3 mm.

[0097] The insulating layer 16A, used to integrally seal the support 12 and its constituent parts, is a polysilazane coating, or an insulating resin such as epoxy resin, silicone resin, acrylic resin, or thermoplastic resin. By using an insulating layer for integral sealing, i.e., sealing in one step, the process can be simplified. When using these resins, the insulating layer 16A is preferably a resin with high transmittance to the emission wavelength, which is biocompatible and has high thermal conductivity. As such an insulating resin, polycarbonate (PC), polyethylene terephthalate (PET), polyimide (PI), polyurethane, polyesterimide, etc., can be used, as these resins have had their adverse effects on organisms mitigated by adjusting their composition and structure. The insulating layer 16A can also be a structure in which a biocompatible resin layer is provided on the surface of the polysilazane coating. Through the insulating layer 16A, the electrical connection between the light-emitting element 11 and the first insulated wire 14a and the second insulated wire 14b can be isolated from the refrigerant 51. While maintaining this sealed state, the first insulated wire 14a and the second insulated wire 14b are led out from the insulation layer 16A along the -Z direction.

[0098] The first insulated wire 14a and the second insulated wire 14b, cooled by the refrigerant 51, also function as heat dissipation materials. The insulated wire 14 is, for example, enameled wire, with a polyurethane insulating coating applied to metal wires that are good conductors such as Cu and Ni. Instead of polyurethane, coatings of polyester, polyesterimide, polyimide, or other insulating resins can also be used. By using the insulating coating on the surface of the insulated wire 14 as a heat dissipation material, the heat emitted by the light-emitting element 11 can be released to the outside. When angled enameled wires are used as the first insulated wire 14a and the second insulated wire 14b, a wide wiring pattern is formed, increasing the contact area with the support 12. Furthermore, with the same circumscribed circle area, a circular enameled wire can reduce the circumscribed circle area more than an angled enameled wire, thus enabling further miniaturization.

[0099] The light-emitting element 11, for example, is an end-face emitting laser element, which resonates in a direction parallel to the Z-axis. When an end-face emitting laser element is used as the light-emitting element 11, one end face in the resonant direction becomes the light-emitting surface 111. On the light-emitting element mounting surface 121 of the support 12, an optical component 17 is arranged opposite to the light-emitting surface 111 of the light-emitting element 11, which guides the light emitted from the end-face emitting laser element in a direction intersecting the light-emitting element mounting surface 121. The direction intersecting the light-emitting element mounting surface 121 refers to all directions other than those parallel to the light-emitting element mounting surface 121, and can be set in the range of 50° to 130° relative to the light-emitting element mounting surface 121, for example. It can also be a direction perpendicular to the light-emitting element mounting surface 121. Here, the "perpendicular" direction is not necessarily a right angle in the strict sense relative to the light-emitting element mounting surface 121, and includes a range of 90° ± 5° considering the manufacturing errors and surface conditions of the support 12 and the optical component 17. The light emitted from the light-emitting element 11 is reflected by the light-incident surface 171 of the optical component 17 and directed in a predetermined direction. If a polysilazane coating is used for the insulating layer 16A, the light can also be reflected by the polysilazane coating. As long as a predetermined space 13 can be maintained between the optical component 17 and the light-emitting surface 111 of the light-emitting element 11, the optical component 17 can be constructed by combining a first optical component for controlling the spread angle of the light emitted from the light-emitting element 11 and a second optical component with a reflective function.

[0100] exist Figure 12A In this structural example, to avoid obstructing light emission from the light-emitting element 11 in the Z direction and reflection by the optical component 17, a first insulated wire 14a and a second insulated wire 14b are respectively connected to the upper surface of the light-emitting element 11 and the back surface 122 of the support 12. A conductive layer 124 is formed on at least a portion of the surface of the support 12. Figure 12A In this example, the support 12 includes a conductive layer 124 formed on at least a portion of the light-emitting element mounting surface 121, the back surface 122, and the side surface connecting the light-emitting element mounting surface 121 and the back surface 122. Thus, on one side of the support 12 at the light-emitting element mounting surface 121, a first insulated wire 14a is directly or indirectly electrically connected to one electrode of the light-emitting element 11. On the back surface 122 of the support 12, a second insulated wire 14b is directly or indirectly electrically connected to the other electrode of the light-emitting element 11 through the conductive layer 124 formed on the support 12.

[0101] Figure 12B The structure of the light-emitting element 11 mounted on the support 12 of the lighting device 10B and the insulated wire 14 electrically connected to the light-emitting element 11 is the same as that of the lighting device 10A, but the covering state of the insulating layer 16B is the same. Figure 12AThe thickness of the insulating layer 16B can be at least partially thicker than that of the light-emitting element 11. In this case, the space between the light-emitting surface 111 of the light-emitting element 11 and the light-incident surface 171 of the optical component 17 can be buried in the insulating layer 16B. Light emitted from the light-emitting surface 111 of the light-emitting element 11 passes through the insulating layer 16B and then enters the light-incident surface 171 of the optical component 17. The material of the insulating layer 16B can be the same as that of the insulating layer 16A. By thickening the insulating layer 16B, the support 12, the light-emitting element 11, the optical component 17, and the insulated wire 14 can be stably maintained as a whole, and contact between the optical bonding portion and the electrical connection portion and the refrigerant can be effectively suppressed. Furthermore, the thickness of the insulating layer 16B can be greater than the thickness of the light-emitting element 11 throughout its entire area.

[0102] Figure 13 This is a perspective view of the main body of the illumination device before it is sealed by the insulating layer 16 (or 16A, or 16B). A predetermined space 13 is provided between the light emitting surface 111 of the light-emitting element 11 and the light incident surface 171 of the optical component 17. Light emitted from the light-emitting element 11 passes through the space 13 and enters the optical component 17, and is reflected in a predetermined direction. A conductive layer 124 is formed in such a way that it covers at least a portion of the light-emitting element mounting surface 121, at least a portion of the side surface, and at least a portion of the back surface 122 of the support 12. The upper surface of the light-emitting element 11 is connected to the first insulated wire 14a, and the bottom surface of the light-emitting element 11 is connected to the conductive layer 124 formed on the light-emitting element mounting surface 121.

[0103] A portion of the insulating film on the first insulated wire 14a is removed, and the internal metal wiring is electrically connected to one electrode of the light-emitting element 11. A portion of the insulating film on the second insulated wire 14b is removed, and the internal metal wiring is electrically connected to the other electrode of the light-emitting element 11. Figure 13 In this example, a conductive layer 124 is formed from the light-emitting element mounting surface 121 of the support 12, through the side surface, to the back surface 122. The internal metal wiring of the second insulated wire 14b is connected to the conductive layer 124 on the back surface 122 of the support 12. Thus, an electrical connection can be formed between the other electrode of the light-emitting element 11 and the second insulated wire 14b. By providing the conductive layer 124, which is electrically connected to the surface of the support 12, the conductive layer 124 can be used as a heat dissipation component.

[0104] As described above, the optical component 17 is mounted on the support 12 and is positioned opposite the light-emitting surface 111 of the light-emitting element 11. The main body of the optical component 17 is formed of a dielectric material such as glass, and a silver thin film is formed on the light-incident surface 171, but this is not limited to this example. Thin films of aluminum, aluminum alloys, gold, nickel, and platinum can be formed on the light-incident surface (i.e., the reflecting surface) of the main body of insulating materials such as plastics, resins, silicon (Si), aluminum nitride (AlN), silicon nitride (SiN), alumina (Al2O3), glass, quartz, and ceramics. Alternatively, a dielectric multilayer film can be formed instead of a metal reflective film. A light-transmitting insulating layer 16A or 16B is covered on the support 12, the light-emitting element 11, the optical component 17, and a portion of the insulated wire 14 by impregnation, spraying, or other methods.

[0105] Figure 14 This is a schematic diagram of a light-emitting element 11 mounted on a support 12. The light-emitting element 11, as an example, is a ridge-shaped laser element with end-face emission. The light-emitting element 11 includes an n-side electrode 113, an n-side semiconductor layer 114, an active layer 115, a p-side semiconductor layer 116, and a p-side electrode 118. The n-side semiconductor layer 114 may include a light-guiding layer with added n-type impurities, a cladding layer, a contact layer, etc. The p-side semiconductor layer 116 may include a light-guiding layer with added p-type impurities, a cladding layer, a contact layer, etc. The p-side electrode 118 is electrically connected to a first insulated wire 14a. When an ITO electrode is used as the p-side electrode 118, the p-side electrode 118 can also serve as a cladding layer. The p-side electrode 118 is electrically connected to a second insulated wire 14b through a conductive layer 124 formed on the support 12. Figure 14 In this example, the n-side electrode 113 and the first insulated wire 14a can be directly connected, or they can be indirectly connected. For example, a second support can be disposed between the n-side electrode 113 and the first insulated wire 14a. (See reference...) Figure 15 As will be explained later, by holding the light-emitting element 11 between two supports 12-1 and 12-2, heat dissipation can be improved.

[0106] The semiconductor material and composition of the light-emitting element 11 are designed to emit laser light of a desired wavelength. When the light-emitting element 11 is used as an ultraviolet laser, violet laser, blue laser, or green laser, GaN-type materials such as GaN, InGaN, and AlGaN are used. When the light-emitting element 11 is used as a red laser, infrared laser, or near-infrared laser, GaAs-type materials such as GaAs and AlGaAs, or InP-type materials such as InAlGaP and GaInP, are used. With the light-emitting element 11 mounted on the support 12, from the viewpoint of sealing the first insulated wire 14a and the second insulated wire 14b together using insulating layers 16A or 16B, a larger ridge width can be formed to ensure the gain of the active layer 115. The ridge width can be designed to be, for example, from 2 μm to 100 μm. The lateral mode can be either multi-mode or single-mode.

[0107] Unlike irradiation devices that irradiate lasers via optical fibers, the light emitted by the light-emitting element 11 in this embodiment is linearly polarized light. By using optical components 17 such as mirrors to change the reflection direction, the direction of the emitted linearly polarized light can be altered. This, for example, reduces the reflectivity when it enters a living organism and increases the transmittance to the organism. Light in a specific polarization state during the laser emission phase is also depolarized or depolarized when transmitted through a medium such as an optical fiber. In this embodiment, light can be directly irradiated onto the affected area within the body without using an optical fiber; therefore, light can be irradiated onto a target location such as the affected area while maintaining a specific polarization state.

[0108] Figure 15 This is a schematic diagram showing a stacked example of the support 12 and the light-emitting element 11. In this structural example, the light-emitting element 11 is sandwiched between a first support 12-1 and a second support 12-2. The first support 12-1 contacts the upper surface of the light-emitting element 11, and the second support 12-2 contacts the bottom surface of the light-emitting element 11. By sandwiching the light-emitting element 11 between the first support 12-1 and the second support 12-2, heat can be efficiently released from the upper and lower sides of the light-emitting element 11, thereby improving the heat dissipation of the lighting device 10. The rear end of at least one of the support 12-1 and the second support 12-2 can extend in the -Z direction. Figure 15 In this embodiment, it is assumed that light is output in a direction not parallel to the optical axis (Z-axis) (e.g., Y-direction) by optical component 17. However, as described in the second embodiment, when light is extracted in a direction parallel to the light-emitting element mounting surface 121 of the support 12, the front end sides of the first support 12-1 and the second support 12-2 can be extended longer in the +Z direction. Figure 15 The entire structure is covered by insulating layer 16A or 16B.

[0109] (9th embodiment)

[0110] Figure 16 This figure illustrates an example of an in vivo light irradiation assembly 200 using the light irradiation device 20 of the ninth embodiment. The in vivo light irradiation assembly 200 includes a conduit 50 and a light irradiation device 20 inserted into the conduit 50, and the conduit 50 is filled with a refrigerant 51 when in use. The in vivo light irradiation assembly 200 is used for treatment, diagnosis, sensing, etc. Similar to the light irradiation device 10 of the eighth embodiment, the light irradiation device 20 is inserted into the conduit 50 along the "insertion direction" indicated by the white arrow in the figure and introduced into the body.

[0111] The illumination device 20 is used with its heat-generating parts cooled. In the ninth embodiment, insulated wires 24 are led out from both sides of the insulating layer 26 along the optical axis to improve heat dissipation. The insulated wires 24 include a first insulated wire 24a and a second insulated wire 14b electrically connected to the light-emitting element 11. The length of the insulated wires 24 led out from the insulating layer 26 along the +Z direction can be shorter than the length of the insulated wires 24 led out from the insulating layer 26 along the -Z direction. To achieve this structure, the light emitted from the light-emitting element 11 is guided in a direction parallel to the mounting surface of the light-emitting element, or in a direction unobstructed by the first insulated wires 24a and the second insulated wires 24b. The insulating layer 26 can be coated in the following manner: Figure 12A As shown, a thin cover is applied along the surface shape of the support 12 and the components mounted on the support 12 to improve heat dissipation, or as shown... Figure 12B As shown, the parts installed on the support 12 are locally thicker, and the overall thickness of the lighting device is minimized to ensure the electrical insulation of the refrigerant 51.

[0112] Figure 17 This is a diagram showing an example of the configuration of the optical components 27 of the illumination device 20. Figure 17 To clearly illustrate the structure, the diagram shows the state before the first insulated wire 24a and the second insulated wire 24b are electrically connected to the light-emitting element 11. Light emitted from the light-emitting surface 111 of the light-emitting element 11 is reflected by the optical component 27 in a direction substantially parallel to the light-emitting element mounting surface 121, and the output light Lout of the illumination device 20 is extracted along the direction of the dashed arrow. Light can also be reflected in a direction not parallel to the light-emitting element mounting surface 121, provided that the reflected light from the optical component 27 is not blocked by the first insulated wire 24a and the second insulated wire 24b.

[0113] In the actual lighting device 20, the light-emitting element 11, the optical component 27, and the electrical connection portions of the light-emitting element 11 and the first insulated wire 24a and the second insulated wire 24b are integrally sealed with the support body 12 by the insulating layer 26. At least a portion of the insulating layer 26 between the light-emitting surface 111 of the light-emitting element 11 and the light-incident surface 171 of the optical component is transparent to light emitted from the light-emitting element 11.

[0114] The light-emitting element 11 is, for example, a surface-emitting laser element. The light-emitting element 11 can be a laser element with a wide ridge structure similar to that in the eighth embodiment. The direction parallel to the Z-axis of the light-emitting element 11 is the resonant direction. An optical component 27 is disposed on the light-emitting element mounting surface 121 of the support 12 to guide light emitted from the exit surface of the laser element in a direction parallel to the light-emitting element mounting surface 121 of the support 12. First insulated wire 24a and second insulated wire 24b (see reference) Figure 16 The light-emitting element 11 and the support 12 are sandwiched between the two and extend along the +Z and -Z directions. Therefore, the light from the light-emitting element 11 is reflected by the optical component 27 in a direction that is not blocked by the first insulated wire 24a and the second insulated wire 24b.

[0115] The optical component 27 reflects light emitted from the light-emitting surface of the light-emitting element 11 in, for example, a direction parallel to the mounting surface 121 of the light-emitting element. Here, "parallel" does not need to be strictly parallel to the mounting surface 121 of the light-emitting element; an error of ±10° is permissible, including the surface condition of the support 12 and manufacturing errors of the optical component 27. Light can also be extracted from angles other than parallel, as long as the laser light reflected by the optical component 27 does not collide with the first insulated wire 24a and the second insulated wire 24b. The optical component 27 preferably has the same thickness as the light-emitting element 11, or a thinner thickness. The optical component can be a mirror or prism with a planar surface, or a polarizing element with an inserted surface element. Furthermore, the optical component 27 can also be an optical element with a lens function, used to control the diffusion angle of the light emitted from the light-emitting element 11. The optical component 27 can also be composed of two or more optical elements. For example, it may include an optical element having a lens function that controls the diffusion angle of the light emitted by the light-emitting element 11, and an optical element that reflects the light whose diffusion angle is controlled by the optical element at a predetermined angle.

[0116] With the first insulated wire 24a and the second insulated wire 24b extending from both ends of the support 12 along the +Z and -Z directions, respectively, the insulating layer 26 integrally seals the parts requiring electrical insulation. The electrical connection between the light-emitting element 11 and the first and second insulated wires 24a and 24b, as well as at least the light-emitting surface 111 of the light-emitting element 11 and the light-incident surface 171 of the optical component 17, are sealed by the insulating layer 26 and isolated from the refrigerant 51. The insulating layer 26 is preferably a biocompatible resin with high thermal conductivity.

[0117] At least one end of the support body 12 in the long side direction (Z direction) can protrude from the insulating layer 26. The support body 12 protruding from the insulating layer 26 contacts the refrigerant 51 to ensure heat dissipation of the lighting device 20. Furthermore, by extending the first insulated wire 24a and the second insulated wire 24b to both sides of the support body 12 in the long side direction, heat dissipation can be further improved compared to the eighth embodiment. Similar to the eighth embodiment, the overall thickness and width of the lighting device 20 are approximately 0.5 mm, realizing an ultra-compact lighting device 20 that can be installed in the conduit 50. In the structure of the ninth embodiment, as... Figure 15 As shown, the light-emitting element 11 can be held by two supports 12-1 and 12-2. In the ninth embodiment, the light emitted from the light-emitting element 11 is extracted in a direction unobstructed by the support 12. Therefore, by being held by two supports 12-1 and 12-2, the heat dissipation of the lighting device 20 can be further improved.

[0118] (10th Embodiment)

[0119] Figure 18 This is a schematic diagram of the lighting device 30 according to the tenth embodiment. Similar to the eighth and ninth embodiments, the lighting device 30 can also be installed in the conduit 50 (see reference 1). Figure 11 and Figure 16 In this embodiment, a light-emitting component consisting of a light-emitting device 30 and a conduit 50 is used. In the 10th embodiment, a vertical cavity surface-emitting laser (VCSEL) is used as the light-emitting element 31.

[0120] The illumination device 30 includes two light-emitting elements 31 for emitting light of a specified wavelength, a support 12 for mounting the light-emitting elements 31, and insulated wires 34 electrically connected to the light-emitting elements 31. The insulated wires 34 include a first insulated wire 34a connected to one electrode of each light-emitting element 31, and a second insulated wire 34b connected to the other electrode. The light-emitting surface of the light-emitting element 31, the electrical connection between the light-emitting element 31 and the insulated wires 34, are integrally sealed to the support 12 via an insulating layer 36. At least one end of the support 12 along its long side (Z direction) can protrude from the insulating layer 36. At least a portion of the insulating layer 36 covering the light-emitting surface is translucent. The thickness of the insulating layer 36 can be thicker or thinner than the thickness of the light-emitting elements 31.

[0121] The light-emitting surface of the VCSEL used for the light-emitting element 31 is parallel to the light-emitting element mounting surface 121 of the support 12. The laser emitted from the VCSEL, as shown by the white arrow in the figure, is emitted in a direction perpendicular to the light-emitting element mounting surface 121. In this structure, optical components such as mirrors are not required.

[0122] The first insulated wire 34a and the second insulated wire 34b are, for example, two-core enameled wires. The first insulated wire 34a is on one side of the light-emitting element mounting surface 121 of the support 12 and is connected to one electrode of each light-emitting element 31. The second insulated wire 34b is on the back side of the support 12 (the side opposite to the light-emitting element mounting surface 121) and is connected to the other electrode of each light-emitting element 31. The first insulated wire 34a and the second insulated wire 34b sandwich the support 12 and extend from at least one end of the support 12 along its long side to the outside of the insulation layer 36.

[0123] Figure 19 This is a schematic diagram illustrating an example of the light-emitting element 31 used in the 10th embodiment. The VCSEL, serving as the light-emitting element 31, has a stacked structure consisting of a semiconductor substrate 401, an n-side reflective film 402, an n-type semiconductor layer 403, an active layer 404, a p-type semiconductor layer 405, and a p-side reflective film 406 stacked in this order along the -Y direction. The light emission direction is the +Y direction. The conductivity types of the p-type and n-type semiconductors can also be reversed. The semiconductor substrate 401 can be removed. The n-type semiconductor layer 403 has a flat portion and a protrusion extending from this flat portion in the -Y direction. An active layer 404 is provided on the upper surface of the protrusion of the n-type semiconductor layer 403. A p-type semiconductor layer 405 is provided on the upper surface of the active layer 404, and a p-side reflective film 406 is provided in the area above the p-type semiconductor layer 405, excluding the edge region. A p-side contact layer can be provided between the p-type semiconductor layer 405 and the p-side reflective film 406.

[0124] The light-emitting element 31 includes an insulating layer 407 that covers the upper surface of the flat portion and the side surfaces of the protrusions in the n-type semiconductor layer 403, the side surfaces of the active layer 404, and the edge regions of the side surfaces and upper surface of the p-type semiconductor layer 405. The light-emitting element 31 includes a p-side electrode 408 electrically connected to the p-type semiconductor layer 405 and an n-side electrode 409 electrically connected to the n-type semiconductor layer 403. One side of the p-side electrode 408 and the n-side electrode 409 is disposed on the light-emitting element mounting surface 121 of the support 12. Alternatively, a conductive connection layer (or bump) connected to the light-emitting element mounting surface 121 of the support 12 can be provided in a manner that aligns the p-side electrode 408 and the n-side electrode 409 in the -Y direction. When the light-emitting element 31 is flip-chip mounted on the support 12 via the conductive connection layer connected to the p-side electrode 408 and the n-side electrode 409, the p-side reflective film 406 does not contact the light-emitting element mounting surface of the support 12.

[0125] The n-side reflective film 402 and the p-side reflective film 406 can each be formed, for example, by a DBR (Distributed Bragg Reflector). A DBR has a structure composed of alternating layers of high-refractive-index and low-refractive-index layers. The DBR has a wavelength range of high reflectivity known as the stopband. The center wavelength and wavelength width of the stopband depend on the refractive index and thickness of the high-refractive-index layers and the refractive index and thickness of the low-refractive-index layers. The reflectivity of the DBR in the stopband increases with the refractive index difference between the high-refractive-index and low-refractive-index layers and the number of layers.

[0126] exist Figure 19 In the example shown, a standing wave is formed between the n-side reflective film 402 and the p-side reflective film 406. The wavelength of the standing wave in air falls within the stopband of the n-side reflective film 402 and the p-side reflective film 406, and this wavelength is the oscillation wavelength of the laser. An integer multiple of half of the oscillation wavelength is equal to the optical distance between the opposing reflective surfaces of the n-side reflective film 402 and the p-side reflective film 406. The optical distance is the distance obtained by multiplying the actual distance light travels in a medium by the refractive index of that medium. By applying a positive voltage between the p-side electrode 408 and the n-side electrode 409, current can be injected into the active layer 404. With the injected current, an inversion distribution is generated in the active layer 404, and light amplification, i.e., laser oscillation, is generated due to stimulated emission of the oscillation wavelength. As described above, in the VCSEL of this embodiment, one side of the p-side electrode 408 and the n-side electrode 409 is used as the mounting surface, and it is envisioned that the laser is extracted from the semiconductor substrate 401 side.

[0127] and, Figure 19The structure of the VCSEL shown is illustrative. The structural elements contained in the VCSEL can be formed from known materials. The shape of some of the structural elements contained in the VCSEL can be changed, and other structural elements can also be included. Laser can also be extracted from the opposite side of the semiconductor substrate 401.

[0128] Figure 20A This is a perspective view of the light-emitting element mounting surface 121 side of the support 12 used in the 10th embodiment. Figure 20B This is a perspective view of the back side 122 of the support body. Here, the side opposite to the light-emitting element mounting surface 121 is referred to as the "back side". Conductive layers 124 and 125 are formed on the light-emitting element mounting surface 121 of the support body 12. Conductive layer 124 is formed on the light-emitting element mounting surface 121 of the support body 12 and is electrically insulated from conductive layer 125. Conductive layer 124 includes a connection region 124c connected to one electrode of the light-emitting element 31, and a wide portion 124w at the end of the support body 12 on the -Z side, which is wider than the connection region 124c. The wide portion 124w is used for electrical connection with the first insulated wire 34a. Conductive layer 125 is formed extending from the side of the support body 12 to the back side 122.

[0129] The p-side electrode 408 and n-side electrode 409 of the light-emitting element 31 are respectively connected to the conductive layers 124 and 125 of the light-emitting element mounting surface 121 via conductive connecting layers (or bumps). The wide portion 124w of the conductive layer 124 is electrically connected to the first insulated wire 34a. A portion of the insulating film of the first insulated wire 34a is removed, and the internal metal wiring is connected to the conductive layer 124. On the back surface 122 of the support 12, the conductive layer 125 is electrically connected to the second insulated wire 34b. A portion of the insulating film of the second insulated wire 34b is removed, and the internal metal wiring is connected to the conductive layer 125.

[0130] The first insulated wire 34a and the second insulated wire 34b sandwich the support body 12 and extend along the long side (Z direction) of the support body without obstructing the light emission of the VCSEL. Figure 18 In this configuration, the second insulated wire 34b connected to the back surface 122 of the support 12 can also extend to the vicinity of the front end on the +Z side of the support 12. The first insulated wire 34a and the second insulated wire 34b, protruding from the insulation layer 36 along the -Z direction, come into contact with the refrigerant and are cooled. The support 12 can also protrude from the insulation layer 36 at at least one end in the long side direction and be directly cooled by the refrigerant. The conductive layers 124 and 125 formed on the surface of the support 12 can also serve as heat sinks.

[0131] The VCSEL chip used as the light-emitting element 31 has a length and height of less than 200 μm on one side, is mounted on the support 12, and is sealed by the insulating layer 36. The overall thickness and width of the illumination device 30 are approximately 0.5 mm, realizing an ultra-miniature illumination device 30 that can be installed in the conduit 50. Figure 18 In this example, the thickness of the insulating layer 36 is thinner than the thickness of the light-emitting element 31.

[0132] Figure 21 This is a diagram showing the electrical and light output characteristics of the manufactured lighting device. Figure 22 This is a diagram showing the thermal resistance. The characteristics of this illumination device were determined by fabricating and measuring a sample of the structure according to the eighth embodiment. The resonator length (length in the Z direction) of the light-emitting element 11 used is 1.5 mm, the width (length in the X direction) is 0.2 mm, and the oscillation wavelength is 640 nm. The support 12 is an AlN substrate with a thickness (length in the Y direction) of 0.1 mm. The mirror is a silver mirror with a bottom dimension (length × width) of 0.3 mm × 0.2 mm and a height of 0.2 mm. The first insulated wire 14a and the second insulated wire 14b are polyurethane copper wires with a diameter of 0.1 mm and a length of 1.5 m. The insulation layer 16 is a polysilazane coating.

[0133] Figure 21 The horizontal axis represents the current value [mA] applied through the insulated wire 14, the left vertical axis represents the light output [mW], and the right vertical axis represents the voltage [V]. The black markings in the figure represent the current-to-light output characteristic, and the white markings represent the current-to-voltage characteristic. The light output increases with increasing current; a 100mA injection current yields 30mW of light power.

[0134] Figure 22 The horizontal axis represents time (seconds), and the vertical axis represents thermal resistance (K / W). The thermal resistance reaches saturation approximately 0.1 seconds after the illumination device is switched on. By cooling the illumination device with refrigerant 51 during operation, heat can be efficiently released from the support 12, insulated wires 14, and insulation layer 16, thereby stabilizing the operation of the illumination device.

[0135] The above description is based on specific structural examples, but the present invention is not limited to the structural examples described above. For example, in the eighth embodiment, a second insulated wire 14b that does not obstruct light emission can be led out from the front end of the support 12 along the +Z direction and function as a heat dissipation component. In the structure of the eighth or tenth embodiment, a photodetector such as a photodiode can be arranged on the light-emitting element mounting surface 121 of the support 12 together with the light-emitting element to serve as a biosensor. In the structure of the tenth embodiment, one light-emitting element 31 and one light-receiving element can be installed instead of the structure in which two light-emitting elements 31 are installed on the support 12. When two-core enameled wires are used as insulated wires 14 and 34, one metal wire is used to provide an electrical signal to the light-emitting element 11 or 31, and the other metal wire is used as a readout wire for the signal output from the photodetector.

[0136] The illumination devices 10 (including 10A and 10B), 20, and 30 of embodiments 8 to 10 can be used in combination with an endoscope. The light-emitting elements 11 and 31 can be used not only as a therapeutic laser light source but also as a sensing light source or an illumination light source. In any case, they can function as illumination devices with heat dissipation properties that release heat from the light-emitting elements to the outside, electrical insulation sufficient to ensure insulation in the refrigerant, and can be installed in a conduit. Unlike optical fibers, insulated wires with insulating coatings have greater flexibility. Furthermore, the structure of mounting the light-emitting element itself on the support 12 has excellent integration and a wide range of applications for sensors.

[0137] This disclosure can be used not only for light illumination devices inserted into medical catheters, but also for other medical applications. Additionally, it can be applied to sensors and other applications requiring localized light illumination in conjunction with a refrigerant.

[0138] The illumination devices of embodiments 1 to 7 are not limited to structures installed in living organisms for medical purposes, but can also be used as lighting sources for inspecting the interiors of precision equipment or similar devices in small spaces.

[0139] (11th Embodiment)

[0140] Figure 23 This is a schematic cross-sectional view showing the first example of the structure of the illumination device 10K according to the 11th embodiment. Figure 24 This is a schematic cross-sectional view showing a second example of the structure of the illumination device 10K according to the 11th embodiment. Figure 25 This is a schematic cross-sectional view showing the third example of the structure of the illumination device 10K according to the 11th embodiment. Figures 23-25A cross-section of a strip-shaped illumination device 10K, each having a long side direction P, is shown, including the central axis C0 along the long side direction P.

[0141] Similar to embodiments 8 through 10, the illumination device 10K is also installed inside the conduit 50 (see Figure 10). Figure 11 and Figure 16 In this embodiment, the illumination device 10K and the conduit 50 can constitute an in vivo illumination assembly. In the 11th embodiment, the light emitting section 60 includes a light-emitting element 11 and a support 12-3 supporting the light-emitting element 11. The support 12-3 includes components that are impermeable to radiation such as X-rays. For example, the support 12-3 contains Cu-W or Cu-Mo. Since the support 12-3 includes components that are impermeable to radiation such as X-rays, there is no need to provide an additional marking section. The support 12-3 has a cutout 12c on the opposite side of the optical component 40, across the light emitting section 60. Since the support 12-3 itself can also serve as a marking component or marking section, the illumination device 10K can be miniaturized. The light-emitting element 11 is fixed to the support 12-3, and the support 12-3 and the light emitting surface 111 are configured close together, thus improving the accuracy of the illumination direction. The support 12-3 can also be a block made of Cu-W or Cu-Mo. Since the support 12-3 is conductive, the support 12-3 itself can also serve as a conductive layer.

[0142] The light-emitting element 11 is disposed on the first surface 12a of the upper surface of the support 12-3. The light-emitting element 11 is capable of emitting light from the light-emitting surface 111 intersecting the long side direction P, along the long side direction P. Figure 23 In the example shown, the light-emitting element 11 emits light along the +Z direction. In the illumination device 10K, since the light emitting part 60 includes the light-emitting element 11 and the support 12-3, the support 12-3 can be used as a heat dissipation component to release the heat of the light-emitting element 11.

[0143] The support 12-3 is impermeable to radiation such as X-rays and has a cut 12c. Its shape and position differ at least one of the following when viewed from the first direction Q1 and when viewed from the second direction Q2. Therefore, if an X-ray CT scan or similar imaging technique is used to photograph a biological body internally equipped with the illumination device 10K, the image of the support 12-3 can be confirmed in the photographic image. By confirming at least one of the shape and position of the image of the support 12-3 reflected in the X-ray CT image, the orientation of the support 12 disposed within the biological body can be confirmed. The orientation of the support 12-3 relative to the long side direction P is known, and the illumination device 10K can direct the light emitted from the light-emitting element 11 towards a predetermined direction R intersecting the long side direction P. Therefore, in this embodiment, by using the illumination device 10K, the direction of light irradiation from the illumination device 10K can be determined based on the orientation of the support 12-3 confirmed in the X-ray CT photographic image.

[0144] exist Figure 23 In the first example shown, the support 12-3 has a cut 12c, while... Figure 24 In the second example shown, the support 12-4 may have a protrusion 12d extending along the +Y direction from a first surface 12a, which serves as the upper surface of the support 12-4. The support 12-4, including the protrusion 12d, may be formed as a single integral component, or it may be formed by joining components of different sizes in a cuboid shape. Like the support 12-3, the support 12-4 is impermeable to radiation such as X-rays.

[0145] Or, such as Figure 25 As shown in Example 3, the support 12-5 and the marking portion 20D provided in the optical component 40 can be used together. Like the support 12-3, the support 12-5 is impermeable to radiation such as X-rays.

[0146] This application claims priority to Japanese Patent Application No. 2023-217446, filed with the Japanese Patent Office on December 22, 2023, and Japanese Patent Application No. 2023-217447, filed with the Japanese Patent Office on December 22, 2023, and incorporates the entire contents of those Japanese patent applications.

[0147] Embodiments of the present invention may also include, for example, the following structures.

[0148] <Item 1> A strip-shaped illumination device having a long side direction, comprising: a light emitting part; a marking part directly or indirectly connected to the light emitting part and having radiation impermeability, wherein the marking part observed along a first direction orthogonal to the long side direction has at least one different shape and position than the marking part observed along a second direction orthogonal to the long side direction but different from the first direction, and is capable of irradiating light emitted from the light emitting part along a predetermined direction intersecting the long side direction.

[0149] <Item 2> According to the illumination device described in <Item 1> above, the marking portion includes: a base of an elongated strip; and at least one of a protrusion and a recess disposed on the surface of the base.

[0150] <Item 3> The illumination device according to <Item 1> or <Item 2> above, wherein the illumination device further includes an optical component that reflects light emitted from the light emitting portion along the long side direction in a direction intersecting the long side direction.

[0151] <Item 4> The illumination device according to any one of <Item 1> to <Item 3> above, wherein the light emitting part includes a light-emitting element and a support for supporting the light-emitting element.

[0152] <Item 5> The illumination device described in <Item 4> above, wherein at least one of the light-emitting element and the support is covered by an insulating layer.

[0153] <Item 6> The illumination device according to <Item 4> or <Item 5> above, wherein the illumination device has an insulated wire electrically connected to the light-emitting element, and the insulated wire is electrically insulated from the marking portion.

[0154] <Item 7> The illumination device according to any one of <Items 4> to <Item 6> further includes: a frame having an opening, capable of disposing at least a portion of the light-emitting element and at least a portion of the support body on the inner side; a light-transmitting member sealing the opening of the frame, the light-transmitting member transmitting light emitted from the light-emitting portion and illuminating along a predetermined direction intersecting the long side direction.

[0155] <Item 8> According to the lighting device described in <Item 7> above, the light-emitting element is disposed on the inner side of the frame, and the inner side of the frame is airtight.

[0156] <Item 9> A strip-shaped illumination device having a long side direction, comprising: a light emitting part; a support body on which the light emitting part is fixed; a marking part having radiopaque properties, wherein the marking part observed along a first direction orthogonal to the long side direction has at least one different shape and position than the marking part observed along a second direction orthogonal to the long side direction but different from the first direction, the marking part being disposed on the support body and capable of irradiating light emitted from the light emitting part along a predetermined direction intersecting the long side direction.

[0157] <Item 10> According to the illumination device described in <Item 9> above, the support body includes: a first surface on which the light emitting portion is disposed; a second surface located on the opposite side of the first surface, and the marking portion is disposed on the second surface of the support body.

[0158] <Item 11> According to the illumination device described in <Item 9> or <Item 10> above, the thickness of at least a portion of the marking portion is more than 40 μm and less than 100 μm.

[0159] <Item 12> According to any one of <Items 9> to <Item 11> above, the illumination device, wherein the support body includes: a first surface on which the light emitting portion is disposed; a second surface located on the opposite side of the first surface, wherein the position of the marking portion when viewed in a third direction parallel to the first surface differs from the position of the marking portion when viewed in the third direction after the illumination device has been rotated 180 degrees along the central axis of the illumination device parallel to the long side direction, by more than twice the distance between the first surface and the second surface in the support body.

[0160] <Item 13> The illumination device according to any one of <Items 9> to <Item 12> above, wherein the support body includes: a first surface on which the light emitting portion is disposed; a second surface located on the opposite side of the first surface, wherein the marking portion is disposed on both the first surface and the second surface, and the marking portion disposed on the first surface is different in at least one of size and position from the marking portion disposed on the second surface.

[0161] <Item 14> The illumination device according to any one of <Item 9> to <Item 13> above, wherein the light emitting part is a light-emitting element, and the light-emitting element is disposed on the support.

[0162] <Item 15> The illumination device according to any one of <Item 9> to <Item 14> above, wherein the light emitting part is an optical fiber, and the optical fiber is disposed on the support.

[0163] <Item 16> According to the illumination device described in <Item 14> above, the support body includes: a first surface on which the light emitting portion is disposed; a second surface located on the opposite side of the first surface, the second surface of the support body including a first region and a second region different from the first region, the marking portion being disposed in the first region, and an insulated wire being disposed in the second region.

[0164] <Item 17> An elongated illumination device having a long side direction, comprising: a light emitting part; a support body on which the light emitting part is fixed; an optical component providing at least one optical function of reflection, refraction, and diffraction for light emitted from the light emitting part; a radiopaque marking part, wherein the marking part observed along a first direction orthogonal to the long side direction has at least one different shape and position than the marking part observed along a second direction orthogonal to the long side direction but different from the first direction, the marking part being disposed on the optical component and capable of illuminating the light emitted from the light emitting part along a predetermined direction intersecting the long side direction.

[0165] <Item 18> According to the illumination device described in <Item 17> above, the light emitting part emits light along the long side direction, the optical component includes a reflective surface, the reflective surface reflects the light from the light emitting part in a direction intersecting the long side direction, and the marking part is disposed in the area of ​​the optical component other than the area where the reflective surface is disposed.

[0166] <Item 19> According to the illumination device described in <Item 17> above, in addition to the marking portion, a second marking portion is also provided in the portion other than the support and the optical component.

[0167] <Item 20> The illumination device according to any one of <Items 17> to <Item 19> above, wherein the support and the optical component are integrally formed.

[0168] <Item 21> An elongated light-emitting device having a long side direction, wherein the light-emitting device includes a light-emitting section having a light-emitting element and a support for supporting the light-emitting element, the support including a component with radiation opacity, the support observed along a first direction orthogonal to the long side direction having at least one different shape and position than the support observed along a second direction orthogonal to the long side direction but different from the first direction, and is capable of irradiating light emitted from the light-emitting section along a predetermined direction intersecting the long side direction.

[0169] Symbol Explanation

[0170] 10, 10A, 10B, 10C, 10D, 10E, 10F, 10G, 10H, 10J, 10K, 20, 30 Illumination devices

[0171] 11, 31 Light-emitting elements

[0172] 111 Light exit surface

[0173] Support components 12, 12-1, 12-2, 12-3, 12-4

[0174] 12a First page

[0175] 12b Second page

[0176] 12b1 First Area

[0177] 12b2 Second Zone

[0178] 12c cut

[0179] 12d protrusion

[0180] 121 Mounting surface of light-emitting element

[0181] 122 Back

[0182] 124, 125 conductive layers

[0183] 14, 24, 34 insulated wires

[0184] 14a, 24a, 34a First Insulation Wire

[0185] 14b, 24b, 34b Second Insulated Wires

[0186] Insulation layers 16, 16A, 16B, 26, 36

[0187] 17, 27 Optical components

[0188] 18 optical fibers

[0189] 20A Marking Component

[0190] 20D Marking Section

[0191] 20J Second Marking Section

[0192] 20V First Position

[0193] 20u Second Position

[0194] t1 thickness

[0195] t2, d distance

[0196] 30A frame

[0197] 31A Opening

[0198] 32 Light-transmitting components

[0199] 40 Optical components

[0200] 41 Reflective surface

[0201] 42 sides

[0202] 50 catheters

[0203] 51 Refrigerant

[0204] 60 Light exit part

[0205] 100, 200 Intracellular Lighting Components

[0206] Q1 First Direction

[0207] Q2 Second Direction

[0208] Q3 Third direction

[0209] P Long side direction

[0210] R direction

Claims

1. A strip-shaped lighting device having a long side, comprising: light exit part; and The marking component is directly or indirectly connected to the light emitting part and has radiation-impermeable properties. The marking component observed along a first direction orthogonal to the long side direction differs from the marking component observed along a second direction orthogonal to the long side direction but different from the first direction in at least one of shape and position. It can illuminate light emitted from the light emitting part along a predetermined direction that intersects the direction of the long side.

2. The illumination device according to claim 1, wherein, The marking component includes: The base of the long strip; and At least one of the protrusions and recesses provided on the surface of the base.

3. The illumination device according to claim 1 or 2, wherein, The illumination device includes an optical component that reflects light emitted from the light emitting portion along the long side direction in a direction intersecting the long side direction.

4. The illumination device according to any one of claims 1 to 3, wherein, The light emitting part includes a light-emitting element and a support body that supports the light-emitting element.

5. The illumination device according to claim 4, wherein, At least one of the light-emitting element and the support is covered by an insulating layer.

6. The illumination device according to claim 4 or 5, wherein, The lighting device has insulated wires that are electrically connected to the light-emitting element. The insulated wire is electrically insulated from the marking component.

7. The illumination device according to any one of claims 4 to 6, further comprising: The frame has an opening, which allows at least a portion of the light-emitting element and at least a portion of the support to be disposed on the inner side respectively; and A light-transmitting component that seals the opening in the frame. The light-transmitting component transmits light emitted from the light-emitting portion and irradiated along a predetermined direction intersecting the long side direction.

8. The illumination device according to claim 7, wherein, The light-emitting element is disposed on the inner side of the frame. The inner side of the frame is airtight.

9. A strip-shaped lighting device having a long side, comprising: light exit part; The support body is fixed with the light emitting part; and The marking part is radiopaque. The mark portion observed along a first direction orthogonal to the long side direction differs from the mark portion observed along a second direction orthogonal to the long side direction but different from the first direction in at least one of shape and position. The marking portion is disposed on the support body. It can illuminate light emitted from the light emitting part along a predetermined direction that intersects the direction of the long side.

10. The illumination device according to claim 9, wherein, The support includes: The first surface having the light emitting portion is configured thereon; and The second surface is located on the opposite side of the first surface. The marking portion is disposed on the second surface of the support.

11. The illumination device according to claim 9 or 10, wherein, At least a portion of the marking portion has a thickness of 20 μm or more and 100 μm or less.

12. The illumination device according to any one of claims 9 to 11, wherein, The support includes: The first surface having the light emitting portion is configured thereon; and The second surface is located on the opposite side of the first surface. The position of the mark when viewed in a third direction parallel to the first surface differs from the position of the mark when viewed in the third direction after the lighting device has been rotated 180 degrees along the central axis of the lighting device parallel to the long side direction, by more than twice the distance between the first and second surfaces in the support.

13. The illumination device according to any one of claims 9 to 12, wherein, The support includes: The first surface having the light emitting portion is configured thereon; and The second surface is located on the opposite side of the first surface. The marking portion is disposed on both the first surface and the second surface. The marking portion disposed on the first surface is different from the marking portion disposed on the second surface in at least one of the size and position.

14. The illumination device according to any one of claims 9 to 13, wherein, The light-emitting part is a light-emitting element. The light-emitting element is disposed on the support.

15. The illumination device according to any one of claims 9 to 14, wherein, The light emitting part is an optical fiber. The optical fiber is disposed on the support.

16. The illumination device according to claim 14, wherein, The support includes: The first surface having the light emitting portion is configured thereon; and The second surface is located on the opposite side of the first surface. The second surface of the support includes a first region and a second region different from the first region. The marking portion is provided in the first region. Insulated wires are installed in the second area.

17. A strip-shaped lighting device having a long side, comprising: light exit part; The support body is fixed with the light emitting part; An optical component that provides at least one optical function of reflection, refraction, and diffraction for light emitted from the light emitting portion; and The marking part is radiopaque. The mark portion observed along a first direction orthogonal to the long side direction differs from the mark portion observed along a second direction orthogonal to the long side direction but different from the first direction in at least one of shape and position. The marking portion is disposed on the optical component. The light emitted from the light-emitting part can be irradiated along a predetermined direction that intersects the direction of the long side.

18. The illumination device according to claim 17, wherein, The light emitting part emits light along the long side direction. The optical component includes a reflective surface that reflects light from the light-emitting portion in a direction intersecting the long side direction. The marking portion is located in the area of ​​the optical component other than the area where the reflective surface is provided.

19. The illumination device according to claim 17, wherein, In addition to the marked portion, a second marked portion is also provided in the portion other than the support and the optical component.

20. The illumination device according to any one of claims 17 to 19, wherein, The support and the optical components are integrally formed.

21. A strip-shaped lighting device having a long side, wherein, The illumination device includes a light emitting section, which has a light-emitting element and a support for supporting the light-emitting element. The support includes components that are radiopaque. The support, as viewed along a first direction orthogonal to the long side, differs from the support, in at least one of shape and position, as viewed along a second direction orthogonal to the long side but different from the first direction. It can illuminate light emitted from the light emitting part along a predetermined direction that intersects the direction of the long side.

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