JP2018106086A - Light source device, image projection device and method for manufacturing light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device having high heat dissipation performance using a plurality of optical characteristic conversion elements. A light source device 1 includes a plurality of solid-state light sources 2 and a plurality of first optical systems 3a for condensing a plurality of first light 5 emitted from the plurality of solid-state light sources. A plurality of optical characteristic conversion elements 4 that generate a second light 6 having characteristics different from those of the first light by using the system array 3 and a plurality of first lights incident from the plurality of first optical systems. A second optical system array 7 including a plurality of second optical systems 3a collimating a plurality of second lights generated by the plurality of optical property conversion elements, a first optical system array, and a second optical system array. It has a heat radiating member 8 which is arranged between the optical system array and has a plurality of openings 8a opened on the first optical system side and the second optical system side. A plurality of optical characteristic conversion elements are arranged in a plurality of openings in the heat radiating member. [Selection diagram] Fig. 1

Description

  The present invention relates to a light source device configured using a light characteristic conversion element such as a phosphor, and more particularly to a device suitable for an image projection device.

  As a light source device used for an image projection device, there is one using a solid light source (laser light source) and a phosphor as an optical characteristic conversion element. For example, white light can be generated by irradiating a phosphor with blue laser light to obtain yellow light (mixed light of green light and red light) that is fluorescent light on the long wavelength side.

  Patent Document 1 discloses a light source device having a plurality of segment regions, and a phosphor array in which phosphors that emit light of the same wavelength when irradiated with excitation light are arranged in each segment region. . This light source device has a plurality of solid light sources that irradiate each of phosphors arranged in a plurality of segment regions with excitation light, and an illumination optical system that superimposes light from the plurality of phosphors. Furthermore, this light source device has a switching mechanism for switching a phosphor that irradiates excitation light by controlling a solid-state light source, and extends the life of each phosphor by dispersing energy of excitation light that irradiates the phosphor. It is possible.

  Patent Document 2 discloses a phosphor plate manufactured by arranging phosphors on the entire surface of a substrate or in an array. By manufacturing such a phosphor plate, deterioration and breakage of the phosphor are suppressed.

JP 2012-178319 A JP2013-15639A

  However, the light source device and the phosphor plate disclosed in Patent Documents 1 and 2 only have heat radiating means for radiating heat generated in the phosphor to the glass surface having low thermal conductivity in contact therewith by heat conduction. As a result, heat may be accumulated inside the phosphor, and the phosphor may be easily damaged.

  The present invention provides a light source device having a high heat dissipation performance using a plurality of phosphors.

  A light source device according to one aspect of the present invention includes an incident-side optical system including a plurality of first optical systems that collect a plurality of first lights emitted from a plurality of solid-state light sources, and a plurality of first lights. And a plurality of light characteristic conversion elements that generate a plurality of second light having different characteristics from the first light, and arranged in the optical paths of the plurality of second lights emitted from the plurality of light characteristic conversion elements A plurality of apertures that are disposed between the incident side optical system side and the output side optical system side, and are arranged between the incident side optical system and the output side optical system. And a heat dissipation member having a portion. And the some optical characteristic conversion element is arrange | positioned in the some opening part in a thermal radiation member, It is characterized by the above-mentioned.

  Note that an image projection device that projects light by modulating light from the light source device also constitutes another aspect of the present invention.

  According to another aspect of the present invention, there is provided a light source device manufacturing method including an incident-side optical system including a plurality of first optical systems that collect a plurality of first lights emitted from a plurality of solid-state light sources. A plurality of light characteristic conversion elements that generate a plurality of second lights having different characteristics from the first light by using the plurality of first lights, and a plurality of second light emitted from the plurality of light characteristic conversion elements And a light output side optical system including a plurality of second optical systems arranged in the optical path of the light. The manufacturing method includes a step of preparing a heat dissipating member that is disposed between the incident side optical system and the output side optical system and has a plurality of openings opened to the first optical system side and the second optical system side; The material of the light characteristic conversion element is defined by the step of filling the material of the light characteristic conversion element into the plurality of openings in the heat dissipation member and the dimension in the direction in which the incident side and emission side optical systems of the heat dissipation member are disposed. And a step of setting the thickness in the opening using the thickness of the heat dissipating member.

  According to the present invention, it is possible to realize a light source device with high heat dissipation performance by disposing a phosphor in a plurality of openings provided in a heat dissipation member and disposing the phosphor between an incident side and an output side optical system. it can. As a result, a long-life and high-performance image projection apparatus can be realized.

Sectional drawing which shows the structure of the light source device which is Example 1 of this invention. 1 is a perspective view of a heat dissipation member used in Example 1. FIG. The table which compares the characteristic of Example 1 and a comparative example. Sectional drawing which shows the structure of the light source device which is Example 5 of this invention. Sectional drawing which shows the structure of the light source device which is Example 7 of this invention. Sectional drawing which shows the structure of the light source device which is Example 8 of this invention. Sectional drawing which shows the structure of the modification of Example 8. FIG. FIG. 10 is a diagram illustrating a configuration of a modified example of the seventh embodiment. The figure which shows the structure of the image projection apparatus using the light source device of each Example.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a configuration of a light source device 1 that is Embodiment 1 of the present invention. The light source device 1 is configured for the purpose of emitting light of a specific wavelength, and can be used for an image projection device described later, a headlamp of an automobile, and the like.

  The light source device 1 includes a plurality of solid-state light sources 2, a condensing optical system array 3 that is an incident side optical system (first optical system array), a plurality of light characteristic conversion elements 4, and an emission side optical system (second optical system). A collimating optical system array 7 and a heat dissipating member 8.

  Each of the plurality of solid-state light sources 2 includes a laser diode, an LED, or the like, and emits first light 5. In the condensing optical system array 3, a plurality of condensing optical systems (first optical systems: for example, condensing lenses) 3a for condensing the plurality of first lights 5 from the plurality of solid state light sources 2 are integrated. Is formed. The plurality of condensing optical systems 3a are two-dimensionally arranged along a plane orthogonal to one optical axis of the plurality of condensing optical systems 3a. The condensing optical system array 3 can be formed of plastic, glass, and quartz. The plurality of first lights 5 collected by the plurality of condensing optical systems 3 a are incident on a plurality of light characteristic conversion elements 4 prepared for each first light 5.

  The light characteristic conversion element 4 converts a part of the incident first light 5 into second light 6 having different characteristics from that of the first light 5, in other words, generates the second light 6 using the first light 5. It is an element to do. The conversion to light having different characteristics here corresponds to changing the wavelength, converting coherent light into incoherent light, changing the polarization state, and the like. When changing the wavelength, a member containing the phosphor in the Si resin or the phosphor itself is used as the light characteristic conversion element 4. When converting coherent light into incoherent light, an optical property conversion element 4 containing a powder having a high refractive index such as barium sulfate, alumina, zirconia, or the like in Si resin may be used as a diffuser for diffusing light. .

  In the case where a phosphor is used as the light characteristic conversion element 4, the first light 5 is light having a shorter wavelength than the second light 6, and the second light having a longer wavelength is caused by causing a Stokes shift in the phosphor. The light 6 is converted. However, in the phosphor, heat is generated by the energy loss accompanying such wavelength conversion.

  The collimating optical system array 7 is disposed in the optical path of the plurality of second lights 6. In the collimating optical system array 7, a plurality of collimating optical systems that collimate the plurality of second lights 6 emitted from the plurality of light characteristic conversion elements 4 and the first light 5 transmitted through the plurality of light characteristic conversion elements 4. (Second optical system: for example, a collimating lens) 7a is integrally formed. The plurality of collimating optical systems 7a are two-dimensionally arranged along a plane orthogonal to one optical axis of the plurality of collimating optical systems 7a. Similarly to the condensing optical system array 3, the collimating optical system array 7 can also be formed of plastic, glass and quartz.

  The ratio of the emitted second light 6 to the incident first light 5 in the light characteristic conversion element 4 decreases according to the incident density (energy density) of the first light 5 and the temperature rise. For this reason, in this embodiment, in order to reduce the incident density of the first light 5 to each light characteristic conversion element 4, each of the light beams using a plurality of solid light sources 2, condensing optical system 3a and collimating optical system 7a. Increasing the incident area of the first light 5 to the characteristic conversion element 4 reduces the incident density.

  Further, by arranging the optical characteristic conversion element 4 only in the region where the first light 5 is incident and not continuously disposing the region where the first light 5 is not incident (disposed discretely), the optical characteristic is obtained. The amount of conversion element 4 used is reduced and heat dissipation is increased.

  Further, in the present embodiment, the heat radiating member 8 is used in order to improve the heat radiating property. The heat radiating member 8 is disposed around the plurality of discretely arranged light characteristic conversion elements 4. Specifically, as shown in FIG. 2, the heat radiating member 8 has a plurality of openings that open to the condensing optical system array 3 side (incident side optical system side) and the collimating optical system array 7 side (exit side optical system side), respectively. It is a lattice-like single member having the opening 8a. A plurality of light characteristic conversion elements 4 that are discretely arranged in the plurality of openings 8a are arranged. The opening 8a may be rectangular as shown in FIG. 2, or may be another shape such as a circle. In this embodiment, the light characteristic conversion element 4 is in contact with the heat dissipation member 8 (the inner surface of the opening 8a). The cross section of the heat dissipation member 8 shown in FIG. 1 is a cross section taken along the line AA ′ in FIG.

  The optical characteristic conversion element 4 is generally formed of a non-metallic inorganic material and is difficult to dissipate heat. For this reason, the heat radiating member 8 formed of a material having high thermal conductivity (for example, metal) is disposed around each optical characteristic conversion element 4. Thereby, the heat generated in the light characteristic conversion element 4 can be actively drawn into the heat radiating member 8, and cooling of the light characteristic conversion element 4 can be promoted.

  Furthermore, by forming the heat radiating member 8 with a rolled Al plate or the like and making the thickness uniform, it is easy to make the thicknesses of the plurality of light characteristic conversion elements 4 equal to each other using the heat radiating member 8. it can. For example, the heat dissipation member 8 can also serve as a metal mask in the case where the light characteristic conversion element 4 is formed by a printing process such as a metal mask used for soldering, and a plurality of light characteristic conversion elements 4 having the same thickness can be easily obtained. Can be formed.

  In the present embodiment and other embodiments described later, the thickness is a dimension in the direction in which the condensing optical system and the collimating optical systems 3 and 7 are disposed (the traveling direction of the first and second lights 5 and 6). It is. In addition, the case where the thicknesses are equal includes not only the case where the thicknesses are completely equal, but also the case where there is a difference within a tolerance range.

  Thus, a plurality of effects can be obtained by using the heat radiating member 8 formed with a plurality of openings 8a.

  Here, numerical examples of the present embodiment will be described. In the numerical example, six blue laser diodes having a wavelength of 455 nm and an output of 3.5 w were used as the solid light source 2. The total output is 3.5w × 6 = 21w. As the condensing optical system array 3, a lens array having six condensing lenses (condensing optical system 3a) was formed using molded glass. As the optical property conversion element 4, a YAG-Ce phosphor powder dispersed in a low melting glass was used. The curvature of the condensing lens as the six condensing optical systems 3 a was formed so as to condense the first light 5 toward the optical characteristic conversion element 4 in an area of 2 mm square. The collimating optical system array 7 is molded as a lens array having six collimating lenses (collimating optical system 7a) having a curvature such that the second light 6 emitted from the light characteristic conversion element 4 as diverging light is parallel light. It was formed using glass.

  Further, the heat dissipation member 8 disposed around the optical characteristic conversion element 4 has a thickness in the Z direction of 150 μm and is made of Al. Six openings 8a were formed by etching. The material of the optical characteristic conversion element 4 is embedded in these six openings 8a so as to perform mask printing. That is, the material of the optical characteristic conversion element 4 was filled in the six openings 8a, and the thickness of the optical characteristic conversion element 4 was set to be equal to each other using the uniform thickness of the heat radiating member 8. Thereby, the six optical characteristic conversion elements 4 having the same thickness can be easily formed.

When energy transfer in the light source device 1 of this numerical example is measured, the energy density of the first light 5 in the light characteristic conversion element 4 is 3.5 w / (2 mm × 2 mm) = 0.875 w / mm ^2. . The energy converted into the second light 6 by the light characteristic conversion element 4 out of the 3.5 w energy is 1 w, and the energy of the first light 5 that passes through the light characteristic conversion element 4 as it is is 0.5 w. The total was 1.5 w. As a result, the calorific value in the equilibrium state was 2w.
(Comparative example)
Here, a comparative example will be described. This comparative example corresponds to the light source device 1 shown in FIG. Since there is no heat dissipating member 8, a special device must be prepared in order to arrange the light characteristic conversion element at a target position. It is also difficult to make the thicknesses of the plurality of light characteristic conversion elements equal to each other.

  As characteristics of the comparative example, the energy converted into the second light 6 in the light characteristic conversion element 4 is 0.9 w, and the energy of the first light 5 that is transmitted as it is is 0.5 w, which is 1.4 w in total. It became. As a result, the calorific value in the equilibrium state was 2.1 w.

  FIG. 3 shows a table for comparing the characteristics of Example 1 and the comparative example. As can be seen from the figure, the configuration of Example 1 improves the fluorescence conversion efficiency 4 of the light characteristic conversion element 4 by lowering the temperature of the light characteristic conversion element 4 in an equilibrium state as compared with the comparative example, The amount of heat generated by the characteristic conversion element 4 can be reduced.

  A second embodiment of the present invention will be described. In this embodiment, the heat radiating member 8 was bonded to the glass condensing optical system array 3 with an inorganic adhesive. Thereby, the heat generated by the optical characteristic conversion element 4 propagates to the heat radiating member 8 which is an Al plate, further propagates from the heat radiating member 8 to the glass of the condensing optical system array 3, and finally the condensing lens 3a. The surface can be used positively as a heat dissipation surface.

  The characteristics of the present embodiment will be described. The energy converted into the second light 6 by the light characteristic conversion element 4 is 1.1 w, and the energy of the first light 5 that passes through the light characteristic conversion element 4 as it is is 0. The total was 1.6 w. Thereby, the calorific value in the equilibrium state was 1.9 w.

  A third embodiment of the present invention will be described. In this example, the heat radiating member 8 was bonded to the glass collimating optical system array 7 with an inorganic adhesive. Thereby, the heat generated by the optical characteristic conversion element 4 propagates to the heat radiating member 8 which is an Al plate, further propagates from the heat radiating member 8 to the glass of the collimating optical system array 7, and finally the surface of the collimating lens 7a. Can be used positively as a heat dissipation surface.

  The characteristics of the present embodiment will be described. The energy converted into the second light 6 by the light characteristic conversion element 4 is 1.1 w, and the energy of the first light 5 that passes through the light characteristic conversion element 4 as it is is 0. The total was 1.6 w. Thereby, the calorific value in the equilibrium state was 1.9 w.

  Embodiment 4 of the present invention will be described. In this embodiment, the heat radiating member 8 was bonded to the glass condensing optical system array 3 and the collimating optical system array 7 with an inorganic adhesive. Thereby, the heat generated by the optical characteristic conversion element 4 propagates to the heat radiating member 8 which is an Al plate, and further propagates from the heat radiating member 8 to the glass of the condensing optical system array 3 and the glass of the collimating optical system array 7. Finally, the surfaces of the condensing lens 3a and the collimating lens 7a can be positively used as heat dissipation surfaces.

  The characteristics of the present embodiment will be described. The energy converted into the second light 6 by the light characteristic conversion element 4 is 1.2 w, and the energy of the first light 5 that passes through the light characteristic conversion element 4 as it is is 0. The total was 1.7 w. Thereby, the calorific value in the equilibrium state was 1.8 w.

  A fifth embodiment of the present invention will be described with reference to FIG. In this embodiment, a transparent substrate 11 having translucency is provided between the heat dissipation member 8 and the condensing optical system array 3. The other configuration is the same as that of the first embodiment.

  As the transparent substrate 11, a glass substrate of BK7 can be used. The heat radiating member 8 formed by etching the Al plate in the same manner as in Example 1 is attached to one surface of the transparent substrate 11 with an inorganic adhesive. Next, the optical characteristic conversion element 4 is embedded in the opening 8a by an embedding method.

  The heat radiating member 8 and the optical characteristic conversion element 4 are arranged on the transparent substrate 11 which is the same substrate manufactured in this way, and a component in which these are integrated is manufactured. Then, the condensing optical system array 3 is bonded to the other surface of the transparent substrate 11, and the collimating optical system array 7 is bonded to the surface of the heat radiating member 8 opposite to the transparent substrate 11 side.

  By passing through such a manufacturing process, it becomes easy to produce the optical characteristic conversion element 4 by the embedding method as compared with the case where the transparent substrate 11 is not provided.

  A sixth embodiment of the present invention will be described. In this embodiment, Cu is used for the heat radiating member 8. Since Cu has a higher thermal conductivity than Al used in Example 1, as a result, the heat dissipation characteristics are improved, and the optical characteristic conversion efficiency can be improved.

  The characteristics of the present embodiment will be described. The energy converted into the second light 6 by the light characteristic conversion element 4 is 1.1 w, and the energy of the first light 5 that passes through the light characteristic conversion element 4 as it is is 0. The total was 1.6 w. Thereby, the calorific value in the equilibrium state was 1.9 w.

  A seventh embodiment of the present invention will be described with reference to FIG. The present embodiment is a modification of the fifth embodiment shown in FIG. In the present embodiment, the first light characteristic conversion element 12 and the second light characteristic conversion element 13 are used instead of the plurality of light conversion elements 4 in the first to sixth embodiments. In Examples 1-6, the number of the some solid light sources 2 and the number of the some optical characteristic conversion elements 4 are mutually equal. On the other hand, in the present embodiment, the number of the plurality of solid state light sources 2 and the number of the plurality of light characteristic conversion elements 4 are different from each other. Specifically, the number of solid-state light sources 2 is three, and first and second light characteristic conversion elements 12 and 13 are provided as two light characteristic conversion elements.

  The first light characteristic conversion element 12 is the same as the light characteristic conversion element 4 of Examples 1 to 6, but the second light characteristic conversion element 13 is equivalent to one in which the two light characteristic conversion elements 4 are integrally formed. To do. The first light 5 from one solid light source 2 is incident on the first light characteristic conversion element 12, and the first light 5 from two solid light sources 2 is incident on the second light characteristic conversion element 13. To do.

  The phosphor as the optical characteristic conversion element has different calorific value depending on the type, and it is desirable to divide it into small parts as in the first to sixth examples, and the second optical characteristic conversion element 13. In some cases, the temperature distribution and the characteristics obtained therewith are better when formed continuously. In this embodiment, a YAG-Ce phosphor is used as the first light characteristic conversion element 12 in order to make the characteristics of the second light 6 generated by the first and second light characteristic conversion elements 12 and 13 different. A sialon phosphor was used as the second characteristic conversion element 13. And the circumference | surroundings of each fluorescent substance were enclosed by the heat radiating member 8. FIG. As a result, a light source device having a good balance of heat dissipation characteristics, less temperature unevenness, and good characteristics could be produced.

  FIG. 8 shows a configuration example of the light characteristic conversion elements 4a and 4b having different sizes and the two heat radiating members 81 and 82 surrounding them from the incident side of the first light 5 based on the same concept. It shows. The heat dissipating member 81 has four openings, and four light characteristic conversion elements 4a which are divided into small portions are arranged therein. The heat radiating member 82 is formed so as to surround the outer periphery of the heat radiating member 81, and the light characteristic conversion element 4 b continuously formed in a rectangular frame shape is disposed between the heat radiating members 81, 82.

  Example 8 of the present invention will be described with reference to FIG. In this embodiment, the thickness of the opening 8a of the heat radiating member 8 is equal to that of the light characteristic conversion element 4, but the thickness of the portion other than the opening 8a (the portion away from the opening 8a) is made larger than the thickness of the opening 8a. ing. Thereby, it is possible to secure a large area for conducting heat from the heat radiating member 8 to the condensing optical system and the collimating optical system arrays 3 and 7, and to improve the heat radiation efficiency.

  FIG. 7 shows a modification of this embodiment. In FIG. 6, the condensing optical system and collimating optical system arrays 3 and 7 are integrally formed including a plurality of condensing lenses 3a and collimating lenses 7a, respectively. On the other hand, in the modification of FIG. 7, a plurality of condensing lenses 3a and a plurality of collimating lenses 7a are separately formed. However, also in the modified example of FIG. 7, the plurality of condensing lenses 3 a and the plurality of collimating lenses 7 a are respectively fitted into the openings 8 a of the heat radiating member 8, thereby collecting the condensing optical system array 3 and the collimating optical system array. 7 is formed. In order to fit these lenses 3a and 7a into the opening 8a, the thickness of the heat radiating member 8 other than the opening 8a and the opening 8a is made larger than that in FIG. As a result, it is possible to secure a larger area through which heat is conducted from the heat radiating member 8 to the condensing optical system and the collimating optical system arrays 3 and 7 and to further improve the heat radiation efficiency.

  FIG. 9 shows a configuration of an image projection apparatus (hereinafter referred to as a projector) using the light source device 1 of each of the above-described embodiments. In the projector, white light 102 (red light 102r, green light 102g, and blue light 102b indicated by dotted lines) emitted from the light source device 1 enters a projector optical system described below. First, red, green, and blue light 102r, 102g, and blue light 102b enter the polarization conversion element 103, where red, green, and blue illumination light (shown by dotted lines) 104r as linearly polarized light having a uniform polarization direction. , 104g, 104b.

  These illumination lights 104r, 104g, and 104b are separated by the dichroic mirror 105 into red illumination light 104r, blue illumination light 104b, and green illumination light 104g. The green illumination light 104g passes through the polarization separation element (hereinafter referred to as PBS) 108 and the phase compensation plate 112 and reaches the light modulation element 111g. The red and blue illumination lights 104 r and 104 b pass through the polarizing plate 106 and enter the color selective phase plate 107. The color selective phase plate 107 rotates the polarization direction of the blue illumination light 104b by 90 ° while maintaining the polarization direction of the red illumination light 104r as it is. The red illumination light 104r emitted from the color selective phase plate 107 passes through the PBS 109 and the phase compensation plate 112r and reaches the light modulation element 111r. The blue illumination light 104b emitted from the color selective phase plate 107 is reflected by the PBS 109, passes through the phase compensation plate 112b, and reaches the light modulation element 111b. Each light modulation element is constituted by a reflective liquid crystal panel or a digital micromirror device. A transmissive liquid crystal panel can also be used as the light modulation element.

  The light modulation elements 111g, 111r, and 111b modulate the incident green, red, and blue illumination lights 104g, 104r, and 104b to convert them into green, red, and blue image lights 115g, 115b, and 115r. The image lights 115g, 115b, and 115r are combined via the PBSs 108 and 109 and the combining prism 118, and projected onto a projection surface such as a screen by the projection lens 120. Thereby, a color image as a projection image is displayed.

  According to the present embodiment, a projector having a long life and high performance can be realized by using the light source device 1 having excellent heat dissipation efficiency.

  Each embodiment described above is only a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

DESCRIPTION OF SYMBOLS 1 Light source device 2 Solid light source 3 Condensing optical system array 4 Light characteristic conversion element 5 1st light 6 2nd light 7 Collimating optical system array 8 Heat radiation member

Claims (15)

An incident side optical system including a plurality of first optical systems for condensing a plurality of first lights emitted from a plurality of solid state light sources;
A plurality of light characteristic conversion elements that generate a plurality of second lights having different characteristics from the first light by using the plurality of first lights;
An emission side optical system including a plurality of second optical systems arranged in an optical path of the plurality of second lights emitted from the plurality of light characteristic conversion elements;
A heat dissipating member disposed between the incident side optical system and the output side optical system, and having a plurality of openings opened on the incident side optical system side and the output side optical system side;
The light source device, wherein the plurality of light characteristic conversion elements are arranged in the plurality of openings in the heat dissipation member.   The light source device according to claim 1, wherein the heat radiating member is formed as a single member having the plurality of openings. When the thickness in the direction in which the incident side and emission side optical systems in the heat radiating member are arranged is a thickness,
The light source device according to claim 1, wherein a thickness of the heat radiating member is equal to a thickness of the light characteristic conversion element. When the thickness in the direction in which the incident side and emission side optical systems in the heat radiating member are arranged is a thickness,
The light source device according to claim 1, wherein a thickness of the heat radiating member is larger than a thickness of the light characteristic conversion element.   The thickness of the said opening part is equal to the thickness of the said optical characteristic conversion element among the said heat radiating members, and the thickness of parts other than the said opening part is larger than the thickness of the said optical characteristic conversion element. Light source device.   The light source device according to claim 1, wherein the heat radiating member is in contact with the incident-side optical system.   The light source device according to claim 1, wherein the heat radiating member is in contact with the emission side optical system. The heat radiating member and the light characteristic conversion element are disposed on the same substrate different from the incident side and emission side optical systems,
The substrate is in contact with one of the entrance side and exit side optical systems;
6. The light source device according to claim 1, wherein the heat radiating member formed on the substrate is in contact with the other of the incident-side and emission-side optical systems.   The light source device according to claim 1, wherein the heat dissipation member is a metal.   10. The light source device according to claim 1, wherein the number of the plurality of solid-state light sources and the number of the plurality of light characteristic conversion elements are the same as each other.   The light source device according to claim 1, wherein the number of the plurality of solid state light sources and the number of the plurality of light characteristic conversion elements are different from each other.   The plurality of first optical systems is a first lens array configured integrally, and the plurality of the second optical systems are a second lens array configured integrally. The light source device according to any one of 1 to 11. The plurality of first optical systems are two-dimensionally arranged along a plane orthogonal to one optical axis of the plurality of first optical systems,
The plurality of second optical systems are two-dimensionally arranged along a plane orthogonal to one optical axis of the plurality of second optical systems. The light source device according to any one of the above. A light source device according to any one of claims 1 to 13,
A light modulation element that modulates light from the light source device;
An image projection apparatus, wherein an image is displayed by projecting light modulated by the light modulation element onto a projection surface. An incident side optical system including a plurality of first optical systems for condensing a plurality of first lights emitted from a plurality of solid state light sources;
A plurality of light characteristic conversion elements that generate a plurality of second lights having different characteristics from the first light by using the plurality of first lights;
A light source device manufacturing method including: an emission side optical system including a plurality of second optical systems arranged in an optical path of the plurality of second lights emitted from the plurality of light characteristic conversion elements,
Preparing a heat dissipating member disposed between the incident-side optical system and the exit-side optical system and having a plurality of openings opened on the first optical system side and the second optical system side;
Filling the plurality of openings in the heat dissipation member with the material of the light characteristic conversion element;
When the dimension of the heat radiation member in the direction in which the incident side and output side optical systems are arranged is the thickness, the thickness of the material of the light characteristic conversion element in the opening is set using the thickness of the heat radiation member A method of manufacturing a light source device.