JP2017188297A - Fluorescent device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluorescent device capable of suppressing that the fluorescent device dislocates in an optical axis direction of a concave mirror with respect to the concave mirror.SOLUTION: In a fluorescent device, a support body is formed long in a first direction orthogonal to an optical axis direction of a concave mirror, and is disposed across a reflector. End portions of the support body in the first direction are individually fixed to the reflector. The support body supports, on an inward side thereof, a fluorescent element so that the fluorescent element faces the concave mirror. A size of the support body in the optical axis direction is larger than a size thereof in a second direction orthogonal to each of the optical axis direction and the first direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fluorescent device including a fluorescent element that converts at least part of incident excitation light into fluorescence and outputs the fluorescence.

  Conventionally, as a fluorescent device, there is known a fluorescent device including a fluorescent element that converts incident excitation light into fluorescence and outputs it, and a reflector that has a concave mirror that reflects light output from the fluorescent element on its inner surface. (For example, Patent Document 1). By the way, when the fluorescent element is displaced from an appropriate position (for example, the position of the focal point of the concave mirror) with respect to the concave mirror, the light emitted outward from the reflector does not become desired light.

JP 2003-295319 A

  Then, a subject is providing the fluorescence apparatus which can suppress that a fluorescence element displaces in the optical axis direction of a concave mirror with respect to a concave mirror.

  A fluorescent device supports a fluorescent element that converts at least a part of incident excitation light into fluorescent light and outputs the fluorescent light, a reflector having a concave mirror that reflects light output from the fluorescent element, and the fluorescent element. A support body that is formed in an elongated shape in a first direction perpendicular to the optical axis direction of the concave mirror, and is disposed so as to straddle the reflector, the first direction of the support body End portions of the fluorescent element are fixed to the reflector, and the support body supports the fluorescent element on the inner side so that the fluorescent element faces the concave mirror. In the support body, the optical axis direction is Is larger than the dimension in the second direction perpendicular to the optical axis direction and the first direction.

  Further, in the fluorescent device, the reflector includes an opening end portion having an emission opening for emitting the light reflected by the concave mirror to the outside, and the opening end portion is formed on the support body. A configuration in which two concave portions into which the end portions in the first direction are inserted may be provided.

  In addition, the fluorescent device includes a heat radiating portion connected to the outer side of the support to release heat generated in the fluorescent element, and the reflector reflects light reflected by the concave mirror outward. The heat radiating section includes a passage opening for light emitted from the emission opening to pass therethrough, the concave mirror is an ellipsoidal mirror, and the fluorescent element is It may be arranged at the focal position of the concave mirror, and the passage aperture may be smaller than the exit aperture.

  The fluorescent device may include a light source that emits excitation light incident on the fluorescent element.

  As described above, the fluorescent device has an excellent effect that the fluorescent element can be prevented from being displaced in the optical axis direction of the concave mirror with respect to the concave mirror.

1 is an overall schematic diagram of a fluorescent device according to an embodiment, and is an internal view showing a partial cross section. FIG. It is a principal part perspective view of the fluorescence apparatus which concerns on the same embodiment. FIG. 3 is a main part view of the fluorescent device according to the same embodiment, and is a cross-sectional view taken along line III-III in FIG. 2. It is a principal part figure of the fluorescence apparatus which concerns on the same embodiment, Comprising: It is the IV-IV sectional view taken on the line of FIG. It is a figure explaining the effect | action of the fluorescent device which concerns on the same embodiment, Comprising: It is a principal part cross-sectional view. It is a figure explaining the effect | action of the fluorescent device which concerns on the same embodiment, Comprising: It is a principal part longitudinal cross-sectional view. It is a figure explaining the manufacturing method of the reflector concerning the embodiment.

  Hereinafter, an embodiment of the fluorescent device will be described with reference to FIGS. In each drawing, the dimensional ratio of the drawings does not necessarily match the actual dimensional ratio, and the dimensional ratio between the drawings does not necessarily match.

  As shown in FIG. 1, the fluorescent device 1 according to the present embodiment includes a light source 2 that emits excitation light, an optical system 3 that receives light emitted from the light source 2, and light that is emitted from the optical system 3. And a fluorescent element 4 on which is incident. The fluorescent device 1 includes a reflector 5 having a concave mirror 51 that reflects light output from the fluorescent element 4 on the inner surface, and a support 6 that supports the fluorescent element 4.

  The fluorescent device 1 includes a light source 2, an optical system 3, a fluorescent element 4, a reflector 5, and a support body 6, and a first housing 7 that houses the first housing 7. And. The second housing 8 includes a fiber connection portion 81 that connects the end portions of the optical fiber 100, and the light reflected by the concave mirror 51 enters the end surface 100 a of the optical fiber 100.

  In FIG. 1 (the same applies to FIG. 2 and subsequent drawings), the first direction D1 is a direction orthogonal to the optical axis direction D3 of the concave mirror 51, and the second direction D2 is the optical axis direction D3 of the concave mirror 51 and the first direction. The directions are orthogonal to D1. Further, hereinafter, the “optical axis direction” simply refers to the optical axis direction D3 of the concave mirror 51, and is also referred to as “third direction”.

  In the present embodiment, a plurality of light sources 2 (four are shown in FIG. 1) are provided. The light source 2 includes a light emitting element 21 that emits light, and a collimating lens 22 that receives the diverging light emitted from the light emitting element 21 and emits the light as parallel light.

  In the present embodiment, the light emitting element 21 is a semiconductor laser. Specifically, the light emitting element 21 is a CAN type (single emitter type) semiconductor laser having one light emitting portion (emitter). The light emitting element 21 may be an array type semiconductor laser having a plurality of light emitting portions, or may be an LED. In the present embodiment, the light emitting element 21 emits blue light (for example, light having a wavelength of 400 to 470 nm).

  The optical system 3 includes a mirror 31 that reflects the light emitted from the light source 2, a condensing lens 32 that focuses the light emitted from the light source 2, and the light emitted from the condensing lens 32 is made uniform to fluoresce. And a diffusion plate 33 that is incident on the element 4. The light emitted from the optical system 3 is uniformly condensed (for example, the beam diameter is about 0.7 mm) and is incident on the fluorescent element 4. Thereby, the temperature quenching in the fluorescent element 4 can be suppressed, or the damage caused by the heat of the fluorescent element 4 can be suppressed.

  The fluorescent element 4 has a phosphor that converts excitation light into fluorescence. In the present embodiment, the phosphor is made of a YAG-based crystal material, and blue light that is excitation light emitted from the light emitting element 21 of the light source 2 is converted into yellow-green fluorescence (for example, a wavelength of 525 to 525). Light having a peak at 575 nm and having a broad spectrum in the visible range from 450 to 800 nm. In addition, the shape (dimension of the 1st direction D1 and the 2nd direction D2) of the fluorescent element 4 is larger than the shape (beam diameter) of the incident light.

  The fluorescent element 4 converts part of the incident excitation light into fluorescence with a phosphor. Therefore, the light output from the fluorescent element 4 includes fluorescence converted by the fluorescent element 4 and unconverted light (light as excitation light) that has not been converted by the fluorescent element 4. In the present embodiment, the light output from the fluorescent element 4 is combined with the yellow-green light that is fluorescence and the blue light that is unconverted light to become white light.

  As shown in FIGS. 1 to 4, the reflector 5 is formed in a hemispherical shape and includes a concave mirror 51 that reflects light on the inner surface. In addition, the reflector 5 has an apex portion 52 having an incident opening 52a for allowing light to enter the fluorescent element 4, and an output for emitting the light reflected by the concave mirror 51 outward. And an opening end 53 having an opening 53a therein.

  The concave mirror 51 is an ellipsoidal mirror in this embodiment. The reflector 5 is formed, for example, by providing a dielectric multilayer film, an aluminum film, a silver film, or the like that becomes the concave mirror 51 on the inner surface of hemispherical glass. Note that the reflector 5 may be formed entirely of aluminum, silver, or the like.

  The support 6 supports the fluorescent element 4 on the inner side 61 in the optical axis direction D3 so that the fluorescent element 4 faces the concave mirror 51. The fluorescent element 4 is disposed at the position of the first focal point of the concave mirror 51. In addition, since the end surface 100a of the optical fiber 100 connected to the fiber connection portion 81 is disposed at the position of the second focal point of the concave mirror 51, the light output from the fluorescent element 4 is reflected by the concave mirror 51. The light is condensed on the end face 100 a of the optical fiber 100.

  The support 6 is formed long in the first direction D1. In the present embodiment, the support 6 is formed in a long flat plate shape. And the support body 6 is arrange | positioned so that the reflector 5 may be straddled, and the edge parts 62 and 62 of the 1st direction D1 of the support body 6 are being fixed to the reflector 5, respectively. Specifically, the support 6 is disposed so as to straddle the opening end 53 of the reflector 5, and the ends 62 and 62 of the support 6 in the first direction D <b> 1 are respectively the opening end 53 of the reflector 5. It is fixed to.

  In addition, the opening end part 53 is provided with two recessed parts 53b and 53b, and the edge parts 62 and 62 of the support body 6 in the 1st direction D1 are each inserted in the recessed part 53b. The recess 53b penetrates from the inner surface to the outer surface of the reflector 5 in the first direction D1.

  The end 62 in the first direction D1 of the support 6 is fixed to the reflector 5 by the fixing means 11. In the present embodiment, the end 62 of the support 6 and the fixing means 11 sandwich the opening end 53 of the reflector 5 so that the end 62 of the support 6 is the opening end of the reflector 5. 53 is fixed. The fixing means 11 may be an adhesive.

  The dimension of the support 6 in the optical axis direction D3 is larger than the dimension of the support 6 in the second direction D2. For example, the dimension of the support 6 in the optical axis direction D3 is preferably at least twice the dimension of the support 6 in the second direction D2, and more than three times the dimension of the support 6 in the second direction D2. It is more preferable that In the present embodiment, the size of the support 6 in the first direction D1 is 80 mm, the size of the support 6 in the second direction D2 is 14 mm, and the optical axis direction of the support 6 (third direction). The dimension of D3 is 4 mm.

  The first housing 7 includes a heat dissipating part 71 for releasing heat generated in the fluorescent element 4 at a position facing the opening end 53 of the support 6. And the thermal radiation part 71 is formed in flat form, and is arrange | positioned so that it may orthogonally cross with the optical axis direction D3. The heat radiating portion 71 is connected to the outer side 63 of the support 6 in the optical axis direction D3. Specifically, the heat radiation part 71 is connected to the outer side 63 of the support 6 on the end 62 side in the first direction D1 and in the optical axis direction D3.

  The support 6 has a light conductivity that is greater than the heat conductivity of the reflector 5. For example, the support 6 is made of a metal such as aluminum. In addition, the support body 6 may have translucency, for example, may be formed with aluminum oxide (common name, alumina). Moreover, the thermal radiation part 71 has a heat conductivity larger than the heat conductivity of the reflector 5, and has light-shielding property. For example, the support 6 is made of a metal such as aluminum.

  The outer side 63 of the support 6 in the optical axis direction D3 protrudes from the opening end 53 of the support 6 in the optical axis direction D3. Thereby, the thermal radiation part 71 is separated from the reflector 5 in the optical axis direction D3. The support 6 is fixed to the heat radiating portion 71 by the fixing means 12. Further, the reflector 5 is positioned in the first direction D1 and the second direction D2 with respect to the heat radiating portion 71 by the positioning means 13.

  The heat dissipating part 71 includes a passage opening 71a through which light emitted from the emission opening 53a of the reflector 5 passes. The first housing 7 includes a light transmitting part 72 that transmits light emitted from the emission opening 53a of the reflector 5 so as to cover the passage opening 71a.

  The passage opening 71 a of the heat radiating unit 71 is smaller than the emission opening 53 a of the reflector 5. Specifically, the dimension in the first direction D1 of the passage opening 71a is smaller than the dimension in the first direction D1 of the emission opening 53a, and the dimension in the second direction D2 of the passage opening 71a is equal to that of the emission opening 53a. It is smaller than the dimension in the second direction D2.

  The configuration of the fluorescent device 1 according to the present embodiment is as described above. Next, the operation of the fluorescent device 1 according to the present embodiment will be described with reference to FIGS.

  For example, when the temperature of the support 6 rises (or falls) due to heat generation of the fluorescent element 4 (or stop of heat generation), the support 6 may thermally expand (or heat shrink). . In this case, the fluorescent element 4 may be displaced with respect to the concave mirror 51. For example, when an unnecessary load is applied to the support 6 when the support 6 is fixed to the reflector 5, the support 6 is slightly deformed and fixed to the reflector 5. Sometimes. In this case, the fluorescent element 4 may be displaced from the desired position with respect to the concave mirror 51.

  2 to 4, the dimension of the support 6 in the optical axis direction D3 is larger than the dimension of the support 6 in the second direction D2. Thereby, in the support body 6, since the intensity | strength of the optical axis direction D3 becomes larger than the intensity | strength of the 2nd direction D2, it is displaced from the position of the focus of the concave mirror 51 in the optical axis direction D3. Can be suppressed.

  The dimension of the fluorescent element 4 in the second direction D2 is larger than the shape (beam diameter) of incident light. Thereby, even if the fluorescent element 4 is displaced in the second direction D2 with respect to the concave mirror 51, the fluorescent element 4 is arranged at the focal point of the concave mirror 51. Thus, the fluorescent element 4 can be disposed at an appropriate position with respect to the concave mirror 51.

  In addition, since the support 6 has a light shielding property, the light reflected by the concave mirror 51 and incident on the support 6 is lost. That is, the support 6 reduces the effective area (area where light can be emitted) of the emission opening 53a. Therefore, the dimension of the support 6 in the second direction D2 is smaller than the dimension of the support 6 in the optical axis direction D3. Thereby, it can suppress that the support body 6 makes the effective area | region of the output opening 53a small.

  And since the dimension of the optical axis direction D3 of the support body 6 is larger than the dimension of the 2nd direction D2 of the support body 6, it can suppress that the surface area of the support body 6 becomes small. Thereby, it can suppress that the heat dissipation performance of support body 6 itself falls. Therefore, while suppressing that the effective area | region of the radiation | emission opening 53a becomes small, it can also suppress that the performance (heat dissipation performance of support body 6 itself) to which it thermally radiates directly from the support body 6 falls.

  Further, as shown in FIG. 5, the heat radiating portion 71 is connected to the end portion 62 side in the first direction D1 and the outer side 63 in the optical axis direction D3 of the support 6. The passage opening 71 a of the heat radiating portion 71 is smaller than the emission opening 53 a of the reflector 5. Thereby, the heat conduction path R1 from the fluorescent element 4 to the heat radiating portion 71 is shorter than the heat conduction path R2 that radiates heat from the end face 64 in the first direction D1 of the support 6.

Specifically, the following formula is satisfied.
-Distance of route R1 <Distance of route R2-Distance of route R1 =
{(Dimension of the support 6 in the optical axis direction D3) ² + (radius of the passage opening 71a) ² } ^1/2
The distance of the path R2 = (dimension in the first direction D1 of the support 6) / 2
Therefore, the heat dissipation efficiency can be improved.

  As shown in FIG. 6, the concave mirror 51 is an ellipsoidal mirror, and the fluorescent element 4 is disposed at the first focal point of the concave mirror 51 (the focal point closer to the concave mirror 51), and the end face of the optical fiber 100. 100a is arranged at the second focal point of the concave mirror 51 (the focal point farther from the concave mirror 51). According to such a configuration, the light output from the fluorescent element 4 is reflected by the concave mirror 51 and collected toward the end surface 100 a of the optical fiber 100.

  Thereby, in the area | region where the light reflected by the concave mirror 51 passes, the area | region in the passage opening 71a becomes smaller than the area | region in the output opening 53a. Therefore, even if the passage opening 71a is smaller than the exit opening 53a, the light emitted from the exit opening 53a passes through the passage opening 71a without being shielded by the heat radiating portion 71. Therefore, it is possible to prevent the light efficiency from being lowered.

  Next, a method for manufacturing the reflector 5 according to this embodiment will be described with reference to FIG.

  As shown in FIG. 7, the apparatus for manufacturing the reflector prototype 15 that is the prototype of the reflector 5 includes a convex first mold 16, a concave second mold 17, and an annular third mold 18. ing. The first mold 16 and the third mold 18 can be moved individually with respect to the second mold 17.

  The first mold 16 includes a convex inner surface forming portion 16a that forms the inner surface 15a of the reflector prototype 15, and an inner surface forming portion 16a that forms the concave portion 15b that becomes the concave portion 53b of the reflector 5 in the reflector prototype 15. And a recessed portion forming portion 16b protruding from the surface. The second mold 17 includes a concave outer surface forming portion 17 a that forms the outer surface 15 a of the reflector prototype 15.

  First, as shown in FIG. 7A, a material (for example, glass gob) is supplied into the second mold 17. Then, as shown in FIG. 7B, the reflector prototype 15 is molded between the first mold 16 and the second mold 17. Thereafter, as shown in FIG. 7C, the tip of the reflector prototype 15 (lower side than the broken line portion of FIG. 7C) is removed, and the concave mirror 51 is formed on the inner surface of the reflector prototype 15. Is applied, the reflector 5 is manufactured.

  As described above, the inner surface 15 a and the recess 15 b of the reflector prototype 15 are formed by the first mold 16. Thereby, for example, when the distance between the first mold 16 and the second mold 17 is changed due to a manufacturing error or the like when the reflector prototype 15 is formed, the thickness of the reflector prototype 15 is changed. However, the positional relationship between the inner surface 15a and the recess 15b is constant without changing.

  Accordingly, the positional relationship between the concave mirror 51 and the concave portion 53b of the reflector 5 is naturally constant. Since the fluorescent element 4 is supported by the support body 6 positioned in the concave portion 53b of the reflector 5, the fluorescent element 4 is disposed at a fixed position, that is, a desired position with respect to the concave mirror 51 of the reflector 5. It will be. In addition, the manufacturing method of the reflector 5 is not restricted to such a method.

  As described above, the fluorescent device 1 according to the present embodiment includes the fluorescent element 4 that converts and outputs at least a part of incident excitation light into fluorescence, and the concave mirror 51 that reflects the light output from the fluorescent element 4. A reflector 5 having an inner surface; and a support 6 that supports the fluorescent element 4. The support 6 is elongated in a first direction D1 orthogonal to the optical axis direction D3 of the concave mirror 51. The end portions 62 and 62 of the support body 6 in the first direction D1 are fixed to the reflector body 5 respectively, and the support body 6 includes the fluorescent element 4. The fluorescent element 4 is supported on the inner side 61 so as to face the concave mirror 51. In the support 6, the dimension of the optical axis direction D3 is the same as the optical axis direction D3 and the first direction D1, respectively. The dimension is larger than the dimension in the second direction D2 perpendicular to each other.

  According to such a configuration, the support body 6 is formed in an elongated shape in the first direction D1 orthogonal to the optical axis direction D3 and is disposed so as to straddle the reflector 5, and the first direction D1 of the support body 6 The end portions 62 and 62 are respectively fixed to the reflector 5. Since the support 6 supports the fluorescent element 4 on the inner side 61, the fluorescent element 4 faces the concave mirror 51.

  By the way, in the support body 6, the dimension of the optical axis direction D3 is larger than the dimension of the 2nd direction D2 orthogonal to the optical axis direction D3 and the 1st direction D1, respectively. Thereby, in the support body 6, the intensity | strength of the optical axis direction D3 becomes larger than the intensity | strength of the 2nd direction D2. Therefore, the fluorescent element 4 can be prevented from being displaced in the optical axis direction D3 with respect to the concave mirror 51.

  Further, in the fluorescent device 1 according to the present embodiment, the reflector 5 includes an opening end 53 having an emission opening 53a for emitting the light reflected by the concave mirror 51 outward, and The open end 53 is configured to include two recesses 53b into which the end 62 of the support 6 in the first direction D1 is inserted.

  According to such a configuration, the reflector 5 includes the opening end portion 53 having the emission opening 53a for emitting the light reflected by the concave mirror 51 outward. And the opening edge part 53 is equipped with the two recessed parts 53b and 53b, and the edge part 62 of the 1st direction D1 of the support body 6 is inserted in the two recessed parts 53b and 53b, respectively. Thereby, for example, the support 6 can be easily positioned with respect to the reflector 5.

  Further, the fluorescent device 1 according to the present embodiment includes a heat radiating portion 71 connected to the outer side 63 of the support 6 in order to release the heat generated in the fluorescent element 4, and the reflector 5 includes The light reflected by the concave mirror 51 is provided with an emission opening 53a for emitting the light outward, and the heat radiating portion 71 is provided with a passage opening 71a for allowing the light emitted from the emission opening 53a to pass therethrough, The concave mirror 51 is an ellipsoidal mirror, and the fluorescent element 4 is disposed at the focal point of the concave mirror 51, and the passage opening 71a is smaller than the emission opening 53a.

  According to such a configuration, the heat radiating portion 71 is connected to the outer side 63 of the support 6 and releases heat generated in the fluorescent element 4. The light reflected by the concave mirror 51 is emitted to the outside of the reflector 5 from the emission opening 53 a of the reflector 5, and then the light emitted from the emission opening 53 a passes through the passage opening 71 a of the heat radiating unit 71. pass. By the way, the passage opening 71a is smaller than the emission opening 53a. Thereby, for example, since the heat conduction path R1 from the fluorescent element 4 to the heat radiating portion 71 is shortened, the heat radiation efficiency can be improved.

  The concave mirror 51 is an ellipsoidal mirror, and the fluorescent element 4 is disposed at the focal point of the concave mirror 51. Thereby, the light emitted from the emission opening 53 a is condensed toward another focal point of the concave mirror 51. Therefore, even if the passage opening 71a is smaller than the exit opening 53a, the light emitted from the exit opening 53a passes through the passage opening 71a without being shielded by the heat radiating portion 71. Therefore, it is possible to prevent a decrease in light efficiency.

  In addition, the fluorescent device 1 according to the present embodiment includes a light source 2 that emits excitation light incident on the fluorescent element 4.

  The fluorescent device is not limited to the configuration of the above-described embodiment, and is not limited to the above-described effects. It goes without saying that the fluorescent device can be variously modified without departing from the gist of the present invention. For example, it is needless to say that one or a plurality of configurations and methods according to various modifications described below may be arbitrarily selected and employed in the configurations and methods according to the above-described embodiments.

  In the fluorescent device 1 according to the above-described embodiment, the reflector 5 includes an incident opening 52a different from the emission opening 53a. However, the fluorescent device is not limited to such a configuration. For example, the reflector 5 may have a configuration in which the incident opening 52a is also used as the emission opening 53a. According to such a configuration, the light emitted from the light source 2 passes through the emission opening 53a, is reflected by the concave mirror 51 and then enters the fluorescent element 4, and the light output from the fluorescent element 4 is the concave mirror. After being reflected by 51, the light passes through the emission opening 53a and is emitted.

  Moreover, in the fluorescent device 1 according to the above-described embodiment, the opening end portion 53 of the reflector 5 includes the concave portion 53b penetrating from the inner surface to the outer surface of the reflector 5 in the first direction D1. However, the fluorescent device is not limited to such a configuration. For example, the opening end 53 may be configured not to include the recess 53b. Further, for example, the recess 53b may be partially disposed on the inner surface side of the reflector 5 without penetrating from the inner surface to the outer surface of the reflector 5 in the first direction D1.

  In the fluorescent device 1 according to the embodiment, the heat radiating portion 71 is connected to the outer side 63 of the support 6 in the optical axis direction D3. However, the fluorescent device is not limited to such a configuration. For example, the structure that the heat radiation part 71 is connected to the end face 64 of the support body 6 in the first direction D1 may be employed. For example, the heat dissipation part 71 may not be provided, and the support 6 may be configured to release all the heat generated in the fluorescent element 4 to the outside air.

  Further, in the fluorescent device 1 according to the above embodiment, the concave mirror 51 is configured to be an ellipsoidal mirror. However, the fluorescent device is not limited to such a configuration. For example, the concave mirror 51 may be a spherical mirror, or may be a parabolic mirror.

  In the fluorescent device 1 according to the embodiment, the fluorescent element 4 is configured to convert a part of the incident light into fluorescence. However, the fluorescent device is not limited to such a configuration. For example, the fluorescent element 4 may be configured to convert all incident light into fluorescence.

DESCRIPTION OF SYMBOLS 1 ... Fluorescence apparatus, 2 ... Light source, 3 ... Optical system, 4 ... Fluorescence element, 5 ... Reflector, 6 ... Support body, 7 ... 1st housing | casing, 8 ... 2nd housing | casing, 11 ... Fixing means, DESCRIPTION OF SYMBOLS 12 ... Fixing means, 13 ... Positioning means, 15 ... Reflector prototype, 15a ... Inner surface, 15b ... Recess, 15c ... Outer surface, 16 ... First type, 16a ... Inner surface formation part, 16b ... Recess formation part, 17 ... Second Mold, 17a ... outer surface forming part, 18 ... third mold, 21 ... light emitting element, 22 ... collimating lens, 31 ... mirror, 32 ... condensing lens, 33 ... diffuser plate, 51 ... concave mirror, 52 ... top part, 52a Inlet aperture, 53 ... Open end, 53a ... Outgoing aperture, 53b ... Recess, 61 ... Inward side, 62 ... End side, 63 ... Outer side, 64 ... End face, 71 ... Radiation part, 71a ... Pass-through opening, 72 ... translucent portion, 81 ... fiber connecting portion, 100 ... optical fiber, 100a ... end face, D1 ... first Direction, D2 ... second direction, D3 ... optical axis direction (third direction)

Claims (4)

A fluorescent element that converts and outputs at least part of the incident excitation light into fluorescence; and
A reflector having on its inner surface a concave mirror that reflects the light output from the fluorescent element;
A support for supporting the fluorescent element,
The support is formed in an elongated shape in a first direction orthogonal to the optical axis direction of the concave mirror, and is disposed so as to straddle the reflector.
The ends in the first direction of the support are respectively fixed to the reflectors,
The support body supports the fluorescent element on the inner side so that the fluorescent element faces the concave mirror,
The fluorescent device, wherein the support has a dimension in the optical axis direction that is larger than a dimension in a second direction orthogonal to the optical axis direction and the first direction. The reflector includes an opening end portion having an exit opening for emitting the light reflected by the concave mirror outward.
The fluorescent device according to claim 1, wherein the opening end portion includes two concave portions into which end portions in the first direction of the support body are respectively inserted. In order to release heat generated in the fluorescent element, a heat radiating part connected to the outer side of the support,
The reflector includes an exit opening for the light reflected by the concave mirror to exit outward,
The heat dissipating part includes a passage opening through which light emitted from the emission opening passes,
The concave mirror is an ellipsoidal mirror,
The fluorescent element is disposed at a focal point of the concave mirror;
The fluorescent device according to claim 1, wherein the passage opening is smaller than the emission opening. The fluorescent device according to claim 1, further comprising a light source that emits excitation light incident on the fluorescent element.

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