JP2018054783A - Heat radiation device, optical device, and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiation device easy for manufacture and efficiently radiating the heat of a base material.SOLUTION: A heat radiation device 7 includes: a base material 71; and a heat radiation part 7H fixed to the base material 71 and capable of rotating with the base material 71. The heat radiation part 7H includes: a first heat sink 72 and a second heat sink 73. The first heat sink 72 is provided around a rotation center axis 7j of the heat radiation part 7H, and includes: a first base part fixed to the base material 71; and a plurality of first fins 723 protruding to the outside of the first base part as viewed from the direction along a rotation center axis 7j. The second heat sink 73 includes: a second base part 731 fixed to the first base part; and a plurality of second fins 733 arranged between neighboring first fins 723 in the plurality of first fins 723.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heat dissipation device, an optical device, and a projector.

  Conventionally, a projector that modulates light emitted from a light source device according to image information and projects an image on a projection surface such as a screen is known. In recent years, a light source device using a light emitting element such as a semiconductor laser and a phosphor has been proposed as a light source device such as a projector (see, for example, Patent Document 1).

  The light source device described in Patent Document 1 includes a semiconductor laser, a reflective color wheel provided with a phosphor layer, a rotation mechanism, and a fin as a heat radiating portion of the reflective color wheel. The phosphor layer provided on the reflective color wheel emits fluorescence by excitation light emitted from the semiconductor laser. The fin is provided on the side opposite to the phosphor layer of the reflective color wheel, and is formed so as to dissipate heat of the reflective color wheel by being rotated by a rotation mechanism.

JP 2012-13897 A

In recent years, there has been a demand for a projector that includes a light source device that emits light with higher luminance and can project a brighter image. When the output of the semiconductor laser is increased in order to emit light with higher luminance, the reflective color wheel becomes higher in temperature, and thus it is necessary to improve the heat dissipation of the heat dissipation portion.
In order to improve heat dissipation, it is conceivable to increase the surface area of the heat dissipation part. However, if the size of the heat dissipation part is increased, the apparatus becomes larger and heavier. Therefore, there is a method of increasing the number of fins by narrowing the interval.
However, in the heat dissipating part (fin) disclosed in Patent Document 1, when the interval between the fins is narrowed, there are problems that processing is difficult, manufacturing man-hours increase, and members are expensive.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A heat dissipation device according to this application example includes a base material, and a heat dissipation unit fixed to the base material and rotatable together with the base material. The heat dissipation unit includes a first heat sink and a second heat sink. A heat sink, wherein the first heat sink is provided around a rotation center axis of the heat radiating portion, and is fixed to the base member, and the first base portion as viewed from a direction along the rotation center axis. A plurality of first fins protruding outward, and the second heat sink includes a second base fixed to the first base or the base material, and adjacent first fins of the plurality of first fins. And a plurality of second fins arranged between the two.

  According to this configuration, the heat radiating portion includes the first heat sink and the second heat sink described above, and the first heat sink has the first base fixed to the base material, and the second heat sink has the second base at the first base or It is fixed to the substrate. And the thermal radiation part is comprised rotatably with the base material. Thereby, the heat generated in the base material can be radiated by the first heat sink and the second heat sink. The first heat sink has a plurality of first fins, and the second heat sink has a plurality of second fins arranged between the adjacent first fins of the plurality of first fins. Thereby, a plurality of first fins and a plurality of second fins are formed without performing high-definition processing, the interval between the first fins and the second fins is narrowed, and the number of fins is increased. That is, it is possible to increase the surface area and form the heat radiating portion. Therefore, it is possible to provide a heat dissipating device that can easily dissipate heat generated in the base material while easily processing the heat dissipating unit and reducing the number of manufacturing steps of the heat dissipating unit.

  Application Example 2 In the heat dissipation device according to the application example described above, it is preferable that the second heat sink has the second base portion fixed to the first base portion.

  According to this configuration, the second heat sink can dissipate heat generated in the base material transmitted to the second base via the first base.

  Application Example 3 In the heat dissipation device according to the application example, the first heat sink has a first connection portion that connects the first base and the first fin, and the second heat sink is the second base. And a second connecting portion that connects the second fin, the first connecting portion is disposed along the base material, and the second connecting portion is disposed along the base material so as to follow the second base portion. It is preferable that it bends.

  According to this configuration, the heat radiating section can receive the heat of the base material from the first connection section and the second connection section in addition to the first base section and the second base section. Therefore, it is possible to provide a heat dissipation device with improved heat dissipation.

  Application Example 4 In the heat dissipation device according to the application example, it is preferable that the second heat sink has the second base portion fixed to the base material.

According to this configuration, the second heat sink can directly receive and release the heat of the base material that has generated heat at the second base.
The second base is fixed to the base material at a position different from the position where the first base is fixed. As a result, the heat radiating section receives the heat of the base material in a wide range, thereby enabling more efficient heat radiation.

  Application Example 5 In the heat dissipation device according to the application example, it is preferable that the second fin protrudes inside the second base portion when viewed from a direction along the rotation center axis.

  According to this configuration, it is possible to form the first base and the second base at positions separated from each other. As a result, the heat radiating section receives the heat of the base material in a wider range, thereby enabling more efficient heat radiation.

  Application Example 6 In the heat dissipation device according to the application example, the first heat sink includes a first connection portion that connects the first base portion and the first fin and is disposed along the base material. It is preferable that the second heat sink has a second connection portion that connects the second base portion and the second fin and is disposed along the base material.

  According to this configuration, the heat of the base material is transmitted to the first heat sink from the first connection portion in addition to the first base portion, and the heat of the base material is transmitted from the second connection portion to the second heat sink in addition to the second base portion. It is transmitted. This makes it possible to efficiently transfer the heat of the base material to the first heat sink and the second heat sink. Therefore, it is possible to provide a heat dissipation device with improved heat dissipation.

  Application Example 7 In the heat dissipation device according to the application example described above, the second base portion surrounds the first base portion and is located outside the first base portion of the first fin when viewed from the direction along the rotation center axis. It is preferable to be formed so as to overlap the protruding part.

  According to this configuration, it is possible to form the first heat sink and the second heat sink by bringing the first base and the second base fixed to the base material close to each other. As a result, it is possible to provide a wide area for the first base and the second base fixed to the base material. Thus, it is possible to efficiently receive heat generated by the base material and to provide a heat dissipation device that further improves heat dissipation. It becomes possible.

  Application Example 8 In the heat dissipation device according to the application example described above, one of the first heat sink and the second heat sink is provided with a protrusion that can be locked to the other in the rotation direction of the heat dissipation part. Is preferred.

  According to this configuration, the first heat sink and the second heat sink are predetermined in the rotation direction by a simple operation of locking the protrusion provided on one of the first heat sink and the second heat sink to the other in the rotation direction. Can be placed in position. That is, the second fin can be easily arranged at a predetermined position between the adjacent first fins of the plurality of first fins. Therefore, easy manufacture of the heat dissipation device is possible.

  Application Example 9 In the heat dissipation device according to the application example described above, it is preferable that at least one of the first heat sink and the second heat sink is formed of sheet metal.

  According to this structure, the 1st heat sink or the 2nd heat sink, or these both members are formed by the press work from a sheet metal. Accordingly, the first heat sink and the second heat sink can be manufactured at a lower cost and with a simpler number of manufacturing steps, compared with a molding process that is manufactured from a molten metal by a mold or a cutting process that is manufactured by cutting from a lump of metal. At least one of the heat sinks can be formed.

  Application Example 10 An optical device according to this application example includes the heat dissipation device described above, and a phosphor layer that is provided on a base material of the heat dissipation device and emits light when excitation light is incident thereon. It is characterized by.

  According to this structure, the heat | fever of the fluorescent substance layer which generate | occur | produces when excitation light injects can be transmitted to a thermal radiation part via a base material, and can be thermally radiated. Therefore, it is possible to provide an optical device that suppresses the phenomenon (temperature quenching) in which the light emission efficiency decreases as the temperature of the phosphor increases and temperature degradation. Therefore, the optical device efficiently emits fluorescence, and for example, deterioration (discoloration, breakage, etc.) of the phosphor layer, peeling from the substrate, and the like are suppressed.

  Application Example 11 An optical device according to this application example includes the heat dissipation device described above, and a diffuse reflection portion that is provided on a base material of the heat dissipation device and diffuses and reflects incident light. To do.

  According to this structure, the heat | fever of the diffuse reflection part which generate | occur | produces with incident light can be transmitted to a thermal radiation part via a base material, and can be radiated. Therefore, the optical device is capable of extending the life because temperature degradation is suppressed.

  Application Example 12 A projector according to this application example includes a light source, the optical device described above in which light emitted from the light source is incident, a light modulation device that modulates light emitted from the optical device, and A projection optical device that projects the light emitted from the light modulation device.

  According to this configuration, since the optical device described above is provided, a bright image can be projected over a long period of time.

1 is a schematic diagram illustrating a configuration of a projector according to a first embodiment. The schematic diagram which shows the structure of the illuminating device of 1st Embodiment. The perspective view of the thermal radiation apparatus in 1st Embodiment. The disassembled perspective view of the thermal radiation apparatus in 1st Embodiment. The cross-sectional perspective view which shows the base end side of the 2nd connection part in the thermal radiation apparatus of 1st Embodiment. The perspective view of the thermal radiation apparatus in 2nd Embodiment. The disassembled perspective view of the thermal radiation apparatus in 2nd Embodiment. The top view of the thermal radiation apparatus in 2nd Embodiment. The perspective view of the thermal radiation apparatus in 3rd Embodiment. The disassembled perspective view of the thermal radiation apparatus in 3rd Embodiment. The top view of the thermal radiation apparatus in 3rd Embodiment. The schematic diagram which shows the structure of the light source device in 4th Embodiment. The top view of the heat radiator of a modification. The top view which shows the base material of a modification typically.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The projector according to the present embodiment modulates light emitted from a light source according to image information and projects an image on a projection surface such as a screen. In the drawings shown below, the dimensions and ratios of the components are appropriately changed from the actual ones in order to make the components large enough to be recognized on the drawings.

(First embodiment)
[Schematic configuration of projector]
FIG. 1 is a schematic diagram illustrating a configuration of a projector 1 according to the present embodiment.
As shown in FIG. 1, the projector 1 includes an exterior housing 2, a control unit (not shown) housed in the exterior housing 2, and an optical unit. Although not shown, the projector 1 includes a cooling device that cools a cooling target such as an optical component, and a power supply device that supplies power to the electronic component.

[Configuration of optical unit]
As shown in FIG. 1, the optical unit 3 includes an illumination device 31, a color separation optical system 32, a collimating lens 33, a light modulation device 34, a color synthesis optical device 35, and a projection optical device 36.
As will be described in detail later, the illumination device 31 emits white light WL centered on the illumination optical axis 31Ax.

The color separation optical system 32 includes dichroic mirrors 321, 322, reflection mirrors 323, 324, 325, and relay lenses 326, 327. The white light WL incident from the illumination device 31 is converted into red light (LR) and green light (LG). ) And blue light (LB).
The collimating lens 33 is provided for each color light, and collimates the incident color light.

  The light modulation device 34 is provided for each color light (the light modulation devices for LR, LG, and LB are 34R, 34G, and 34B, respectively). Each of the light modulation devices 34R, 34G, and 34B includes a liquid crystal panel and a pair of polarizing plates disposed on the incident side and the emission side of the liquid crystal panel. The light modulation device 34 has a rectangular image forming region in which a plurality of minute pixels (not shown) are formed in a matrix, and modulates incident color light (LR, LG, LB).

The color synthesis optical device 35 includes, for example, a cross dichroic prism, and synthesizes the color light modulated by the light modulation devices 34R, 34G, and 34B.
The projection optical device 36 includes a lens barrel and a plurality of lenses (both not shown), and projects the light combined by the color combining optical device 35 onto the projection surface SC.

[Configuration of lighting device]
FIG. 2 is a schematic diagram illustrating the configuration of the lighting device 31.
As shown in FIG. 2, the illumination device 31 includes the light source device 4 and the uniformizing optical system 5 and emits the white light WL toward the color separation optical system 32 as described above.

  As illustrated in FIG. 2, the light source device 4 includes a light source unit 41, an afocal optical system 42, a first phase difference element 43, a homogenizer optical system 44, a light separation element 45, a first light collection system 46, an optical device 6, A rotation device 4M, a second phase difference element 48, a second light condensing system 49, and a diffusion device 47 are provided.

The light source unit 41 includes a first light source unit 411, a second light source unit 412, and a light combining member 413.
The first light source unit 411 includes a solid light source array 4111 in which a plurality of semiconductor lasers SS, which are solid light sources, are arranged in a matrix, and a plurality of parallel lenses (not shown) corresponding to the respective semiconductor lasers SS. The first light source unit 411 is arranged so that the optical axis 411Ax is orthogonal to the illumination optical axis 31Ax.

Similarly to the first light source unit 411, the second light source unit 412 includes a solid light source array 4121 in which a plurality of semiconductor lasers SS are arranged in a matrix, and a plurality of parallel lenses (not shown) corresponding to the respective semiconductor lasers SS. Have. The second light source unit 412 is arranged to emit light in a direction orthogonal to the optical axis 411Ax of the first light source unit 411.
These semiconductor lasers SS emit blue light (for example, light having a peak wavelength in a wavelength range of 440 nm to 460 nm). In the present embodiment, the blue light emitted from each semiconductor laser SS is S-polarized light.

  The photosynthetic member 413 is disposed at a position where blue light emitted from the first light source unit 411 and the second light source unit 412 enters. Although not shown in detail in the light combining member 413, a plurality of transmission parts that transmit blue light emitted from the first light source part 411 and a plurality of reflections that reflect blue light emitted from the second light source part 412. It is comprised as a plate-shaped object by which the part was arranged alternately. The light combining member 413 transmits the blue light emitted from the first light source unit 411, reflects the blue light emitted from the second light source unit 412 to the opposite side of the first light source unit 411, and outputs each blue light. Is synthesized.

  The afocal optical system 42 includes a convex lens 421 and a concave lens 422, and adjusts the beam diameter of blue light emitted from the light source unit 41. Specifically, the afocal optical system 42 condenses blue light emitted as parallel light from the light source unit 41 to reduce the diameter of the light beam, and further collimates and emits the light.

  The first phase difference element 43 is a half-wave plate. The blue light emitted from the afocal optical system 42 passes through the first phase difference element 43, whereby a part of the S-polarized light is converted into P-polarized light, and S-polarized light and P-polarized light are mixed. Light.

  The homogenizer optical system 44 includes a first multi-lens 441 and a second multi-lens 442, and uniformizes the illuminance distribution of blue light that irradiates a phosphor layer 62 described later in the optical device 6. The blue light applied to the phosphor layer 62 functions as excitation light that excites the phosphor in the phosphor layer 62.

  The light separating element 45 is a prism-type PBS (Polarizing Beam Splitter), and prisms 451 and 452 each formed in a substantially triangular prism shape are bonded to each other at the interface, thereby forming a substantially rectangular parallelepiped shape as a whole. The interfaces of the prisms 451 and 452 are inclined by approximately 45 ° with respect to the illumination optical axis 31Ax and the optical axis 411Ax. A polarization separation layer 453 having wavelength selectivity is formed at the interface between the prisms 451 and 452.

The polarization separation layer 453 separates S-polarized light and P-polarized light contained in blue light, and transmits fluorescence emitted by blue light (excitation light) incident on the phosphor layer 62 regardless of the polarization state. . That is, the polarization separation layer 453 separates S-polarized light and P-polarized light for light in a predetermined wavelength region, but transmits S-polarized light and P-polarized light for light in other predetermined wavelength regions. Polarization separation characteristics.
In the blue light emitted from the homogenizer optical system 44, the P-polarized light passes through the polarization separation layer 453 (light separation element 45) and travels toward the second phase difference element 48, and the S-polarized light passes through the polarization separation layer 453. The light is reflected to the first light collecting system 46 side.

  The 1st condensing system 46 is provided with pick-up lenses 461-463, for example. Blue light of S-polarized light that has passed through the homogenizer optical system 44 and reflected by the polarization separation layer 453 is incident on the first light collection system 46. The first condensing system 46 condenses incident blue light (excitation light) on the phosphor layer 62 and condenses and collimates the fluorescence emitted from the phosphor layer 62 toward the polarization separation layer 453. And inject.

The optical device 6 includes a heat radiating device 7 having a base material 71, a reflective layer 61 and a phosphor layer 62 provided on the base material 71. The base material 71, and the reflective layer 61 and the phosphor layer 62 provided on the base material 71 are referred to as a wavelength conversion element 6A.
The base material 71 is formed in a disk shape from a member such as metal or ceramics. The reflective layer 61 is formed on the first surface 71 </ b> A that is the first light collecting system 46 side of the base material 71.
The phosphor layer 62 contains a phosphor (for example, a YAG-based phosphor (Y, Gd) ₃ (Al, Ga) ₅ O ₁₂ : Ce) and is formed on the reflective layer 61 in a ring shape. . The phosphor is excited by blue light (excitation light) collected by the first light collection system 46, and is fluorescence (yellow light including green light and red light, for example, a wavelength range of 500 to 700 nm) which is non-polarized light. Light having a peak wavelength.

A part of the fluorescence emitted from the phosphor layer 62 is directly directed to the first light collecting system 46 side, and a part thereof is reflected by the reflecting layer 61 and is directed to the first light collecting system 46 side.
As described above, when the wavelength conversion element 6A is irradiated with blue light (excitation light), the phosphor layer 62 and the reflection layer 61 diffuse and emit yellow light toward the first light collection system 46. Then, as described above, the yellow light is collimated by the first light collecting system 46 and passes through the polarization separation layer 453.

  Although described in detail later, the heat dissipation device 7 includes a heat dissipation portion 7H fixed to the base material 71 in addition to the base material 71. The heat radiating portion 7H includes a first heat sink 72 and a second heat sink 73 fixed to the second surface 71B opposite to the first surface 71A of the base material 71. The heat radiating device 7 radiates heat of the phosphor layer 62 that generates heat when irradiated with blue light (excitation light).

  The rotating device 4M includes a motor Mo or the like disposed on the second surface 71B side of the base material 71. The motor Mo has a cylindrical hub (not shown) that rotates in the center, and rotates the base 71 and the heat dissipating part 7H fixed to the base 71 around the rotation center axis 7j.

The second retardation element 48 is a quarter-wave plate, and makes the polarization state of blue light (P-polarized light) emitted from the homogenizer optical system 44 and transmitted through the polarization separation layer 453 circularly polarized.
The second condensing system 49 includes, for example, three pickup lenses 491 to 493, and condenses the blue light transmitted through the second phase difference element 48 on the diffusing device 47.

The diffusing device 47 includes a reflecting plate 471 and a rotating device 472.
The reflective plate 471 includes a base material 471a and a reflective film 471b provided on the surface of the base material 471a on the side where the blue light is incident. A plurality of projections and depressions (not shown) are formed on the surface of the base material 471a on which blue light is incident. The reflective film 471b is a metal having a high light reflectance such as silver or aluminum and is formed along the unevenness of the base material 471a. The unevenness and the reflection film 471b form a diffuse reflection portion 471R. The diffuse reflection portion 471R diffusely reflects incident blue light at a diffusion angle similar to that of yellow light emitted from the phosphor layer 62. The diffuse reflection portion 471R is preferably formed so as to cause Lambertian reflection of incident blue light.

  The rotating device 472 is configured to rotate the reflecting plate 471 so that light incident on a specific position of the diffuse reflecting portion 471R is not concentrated and irradiated. Thereby, deterioration of the diffuse reflection portion 471R is suppressed.

The blue light diffusely reflected by the diffusing device 47 is incident on the second phase difference element 48 again via the second condensing system 49. When reflected by the diffusing device 47, the circularly polarized light is reverse to the circularly polarized light incident on the diffusing device 47, and in the process of passing through the second phase difference element 48, it is 90 ° with respect to the polarized light of blue light. The rotated S-polarized light is converted into blue light.
Then, the blue light transmitted through the second phase difference element 48 is reflected by the polarization separation layer 453, is emitted from the phosphor layer 62, and is combined with the yellow light transmitted through the polarization separation layer 453, and is uniformized as white light WL. It is injected into the system 5.

  The homogenizing optical system 5 includes a first lens array 51, a second lens array 52, a polarization conversion element 53, and a superimposing lens 54. The homogenizing optical system 5 makes the illuminance distribution of the white light WL emitted from the light source device 4 substantially uniform in the image forming regions of the respective light modulators 34 (34R, 34G, 34B).

Specifically, the first lens array 51 has a configuration in which a plurality of small lenses 511, which are small lenses, are arranged in a matrix on a surface orthogonal to the illumination optical axis 31Ax. Divide into partial beams.
Similar to the first lens array 51, the second lens array 52 has a plurality of small lenses 521 arranged in a matrix, and a plurality of partial light beams divided by the small lenses 511 together with the superimposing lenses 54. It is superimposed on the image forming area of the light modulation device 34.
The polarization conversion element 53 is disposed between the second lens array 52 and the superimposing lens 54 and aligns the polarization directions of a plurality of incident partial light beams.

[Configuration of heat dissipation device]
Here, the heat dissipation device 7 will be described in detail.
FIG. 3 is a perspective view of the heat dissipation device 7. FIG. 4 is an exploded perspective view of the heat dissipation device 7. 3 and 4 are views of the heat dissipation device 7 as viewed from the second surface 71B side of the base material 71. FIG.
As shown in FIGS. 3 and 4, the heat radiating device 7 includes the base material 71 and the heat radiating portion 7 </ b> H fixed to the base material 71 as described above. The heat dissipating part 7H includes a first heat sink 72 and a second heat sink 73 disposed on the second surface 71B of the base 71.
The base 71 is formed in a circular shape in plan view, and a round hole 711 into which a hub (not shown) of a motor Mo in the rotating device 4M is fitted is formed in the center.

  The first heat sink 72 is formed by pressing from a sheet metal having a high thermal conductivity such as aluminum, and as shown in FIG. 4, the first base 721, the plurality of first connection portions 722, and the plurality of first fins. 723. The material for forming the first heat sink 72 is not limited to aluminum as long as the material has high thermal conductivity, and may be, for example, copper, silver, or an alloy containing these materials.

The first base portion 721 is provided around the rotation center axis 7j, has a circular shape in plan view, and has a round hole 721a having the same shape as the round hole 711 of the base 71 at the center.
The plurality of first connection portions 722 protrude radially from the first base portion 721 and are disposed along the second surface 71 </ b> B together with the first base portion 721. As shown in FIG. 3, the plurality of first connection portions 722 have an outer shape slightly smaller than the outer shape of the base material 71, and are arranged at equal intervals in the rotation direction R of the heat dissipation device 7. Each first connection portion 722 is formed in a long shape that is longer in the direction of protruding radially than the rotation direction R. In FIG. 3, the rotation direction R of the heat dissipation device 7 is illustrated as counterclockwise when viewed from the second surface 71B side, but the heat dissipation device 7 may be rotated clockwise.

The plurality of first fins 723 protrudes to the outside of the first base portion 721 when viewed from the direction along the rotation center axis 7j on the side opposite to the base 71 of the first base portion 721. Each first fin 723 is bent from one end of the first connection portion 722 in the rotation direction R to the side opposite to the base material 71. Each first fin 723 protrudes so that the distance from the first connection portion 722 increases as the first heat sink 72 is formed from a single sheet metal, and the distance from the rotation center shaft 7j increases. Thus, each first fin 723 is connected to the first base 721 via the first connection portion 722. In other words, each first connection portion 722 connects the first base 721 and each first fin 723 individually.
The first heat sink 72 of the present embodiment has eight first connecting portions 722 and eight first fins 723. Note that the number of the first connection portions 722 and the first fins 723 included in the first heat sink 72 is not limited to eight, and may be other than eight.

The second heat sink 73 is made of the same material as that of the first heat sink 72 and is formed by pressing. As shown in FIG. 4, the second heat sink 73 includes a second base portion 731, a plurality of second connection portions 732, and a plurality of second fins 733.
The second heat sink 73 has a second base portion 731 stacked on the first base portion 721 of the first heat sink 72, and each second fin 733 is disposed between adjacent first fins 723 in the plurality of first fins 723. Is formed.

  The second base portion 731 is formed in a circular shape in plan view larger than the outer shape of the first base portion 721, and a circular hole 731 a having the same shape as the circular hole 711 of the base material 71 is formed in the center.

As shown in FIG. 3, the plurality of second connection portions 732 protrude radially from the second base portion 731, and individually connect the second base portion 731 and the plurality of second fins 733. The plurality of second connection portions 732 have an outer shape that is substantially the same as the outer shape of the first connection portion 722, and are formed at equal intervals in the rotation direction R.
FIG. 5 is a cross-sectional perspective view showing the base end side (second base portion 731 side) of the second connection portion 732 in the heat dissipation device 7.
As shown in FIG. 5, each second connection portion 732 is bent from the second base portion 731 to the base material 71 side along the second surface 71 </ b> B.

The plurality of second fins 733 protrude to the outside of the second base portion 731 when viewed from the direction along the rotation center axis 7j. Similarly to the first fin 723, each second fin 733 bends from one end of each of the second connection portions 732 in the rotation direction R to the opposite side of the base material 71, and the second connection as the distance from the rotation center axis 7j increases. It protrudes so that the distance from the part 732 becomes large.
The second heat sink 73 of the present embodiment has the same number of second connection parts 732 and eight second fins 733 as the first connection parts 722 and the first fins 723. The number of the second connection portions 732 and the second fins 733 included in the second heat sink 73 is not limited to eight, and may be other than eight.

  In addition, a positioning hole 721b is formed in the first base 721, and a positioning hole 731b is formed in the second base 731. The positioning holes 721b and 731b are inner diameters smaller than the inner diameter of the round hole 721a and are used for alignment of the first heat sink 72 and the second heat sink 73 in the rotation direction R. The positioning holes 721b and 731b are formed so that the first heat sink 72 and the second heat sink 73 are aligned at a predetermined position. Specifically, in the first heat sink 72 and the second heat sink 73, pin-shaped jigs are inserted into the positioning holes 721b and 731b, and the circular holes 711 of the base 71, the first heat sink 72, and the second heat sink 73, respectively. The hub of the motor Mo is fitted to 721a and 731a and assembled. Each second fin 733 is disposed at the center between the adjacent first fins 723 in the plurality of first fins 723. Further, the first fins 723 and the second fins 733 are alternately arranged in the rotation direction R.

  The first heat sink 72 is fixed to the base material 71 by applying an adhesive between the first base 721 and the first connection portion 722 and the second surface 71B. The second heat sink 73 is fixed to the first heat sink 72 and the base material 71 by applying an adhesive between the second base portion 731 and the first base portion 721 and between the second connection portion 732 and the second surface 71B. Is done. In other words, the second heat sink 73 has the second base portion 731 fixed to the first heat sink 72 and the second connection portion 732 fixed to the base material 71. An adhesive is also applied between the motor Mo hub and the round holes 711, 721a, 731a, and the base 71, the first heat sink 72, the second heat sink 73, and the motor Mo hub are fixed. As an adhesive used for these fixings, a silicon-based adhesive having a high thermal conductivity can be used.

As described above, the heat radiating portion 7H includes the first base portion 721 and the second base portion 731 stacked in the vicinity of the rotation center shaft 7j, and outside the first base portion 721 and the second base portion 731 when viewed from the direction along the rotation center shaft 7j. The first fins 723 and the second fins 733 are alternately arranged.
The heat radiating device 7 rotates with the hub around the rotation center shaft 7j by driving the motor Mo. And the heat | fever of the fluorescent substance layer 62 which generate | occur | produces by irradiating blue light (excitation light) is transmitted from the base material 71 to the thermal radiation part 7H, and is thermally radiated by this thermal radiation part 7H.

As described above, according to the present embodiment, the following effects can be obtained.
(1) The heat radiating device 7 includes a heat radiating portion 7H fixed to the base 71, and the heat radiating portion 7H includes a first heat sink 72 and a second heat sink 73. The first heat sink 72 and the second heat sink 73 are configured such that the second fins 733 of the second heat sink 73 are disposed between the adjacent first fins 723 of the plurality of first fins 723. Thus, the plurality of first fins 723 and the plurality of second fins 733 are formed without performing high-definition processing, the distance between the first fins 723 and the second fins 733 is reduced, and the number of fins ( The sum of the number of the first fins 723 and the number of the second fins 733), that is, the surface area can be increased to form the heat radiating portion 7H. Therefore, it is easy to manufacture the heat radiating portion 7H, and it is possible to provide the heat radiating device 7 that efficiently radiates the heat of the base material 71 while reducing the number of manufacturing steps of the heat radiating portion 7H.

  (2) As for the 1st heat sink 72, the 1st base 721 is fixed to the base material 71, and as for the 2nd heat sink 73, the 2nd base 731 is being fixed to the 1st base 721. Accordingly, the first heat sink 72 radiates the heat of the base material 71 transmitted to the first base portion 721, and the second heat sink 73 the heat of the base material 71 transmitted to the second base portion 731 via the first base portion 721. Can be dissipated.

  (3) The first heat sink 72 has a first connection part 722 fixed to the base 71, and the second heat sink 73 has a second connection part 732 fixed to the base 71. As a result, the heat radiating portion 7 </ b> H receives the heat of the base material 71 from the first connecting portion 722 and the second connecting portion 732 in addition to the first base portion 721 and the second base portion 731. Therefore, it is possible to provide the heat dissipating device 7 with improved heat dissipation.

(4) The first heat sink 72 and the second heat sink 73 are formed from sheet metal by pressing. Accordingly, it is possible to manufacture the first heat sink 72 and the second heat sink 73 at a lower cost and with a simpler manufacturing process than other manufacturing methods (metal molding, metal cutting, etc.). Become.
In addition, since the plate thickness can be reduced compared to other manufacturing methods, the heat radiation portion 7H can be reduced in weight. Furthermore, since the heat radiation part 7H can be reduced in weight, it is possible to employ a low-power motor Mo, that is, a small-sized and low power consumption motor Mo.

  (5) The phosphor layer 62 is provided on the base 71 provided in the heat dissipation device 7. Thereby, the heat dissipation device 7 can efficiently dissipate the heat of the phosphor layer 62 that generates heat when the excitation light enters. Therefore, it is possible to provide the optical device 6 in which the temperature quenching of the phosphor layer 62 and the temperature deterioration are suppressed. Therefore, the optical device 6 efficiently emits fluorescence (yellow light), and, for example, deterioration (discoloration, breakage, etc.) of the phosphor layer 62 and peeling from the base material 71 are suppressed.

  (6) Since the projector 1 includes the optical device 6 described above, it is possible to project a bright image over a long period of time.

(Second Embodiment)
Hereinafter, the heat dissipation device 8 according to the second embodiment will be described with reference to the drawings. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
FIG. 6 is a perspective view of the heat dissipation device 8. FIG. 7 is an exploded perspective view of the heat dissipation device 8. FIG. 8 is a plan view of the heat dissipation device 8 viewed from the second heat sink 82 side (second surface 71B side).
As shown in FIGS. 6 and 7, the heat dissipation device 8 includes a heat dissipation portion 8H that is different from the heat dissipation portion 7H of the first embodiment.

  The heat radiating portion 8H includes a first heat sink 81 having a shape similar to the shape of the first heat sink 72 of the first embodiment, and a second heat sink 82 having a shape different from the shape of the second heat sink 73 of the first embodiment. ing. In addition, the second heat sink 73 of the first embodiment has a second base 731 fixed to the first base 721, but the second heat sink 82 of the present embodiment is fixed to the base 71. It has two bases 821.

  Specifically, the first heat sink 81 is formed of the same material as that of the first heat sink 72, and similarly to the first heat sink 72, the first base portion 811, the plurality of first connection portions 812 and the plurality of first fins 813 are formed. Have. The first base portion 811 has a shape in which the positioning hole 721b (see FIG. 4) provided in the first base portion 721 of the first embodiment is not provided. In the center of the first base portion 811, a round hole 811 a having the same shape as the round hole 711 of the base material 71 is formed.

  The plurality of first connection portions 812 and the plurality of first fins 813 have the outer shapes of the first connection portions 722 and the first fins 723 of the first embodiment in order to arrange the second base portion 821 of the second heat sink 82. It is formed slightly smaller than the outer shape. The plurality of first connection portions 812 are disposed along the second surface 71 </ b> B together with the first base portion 811. The first heat sink 81 of the present embodiment has eight first connecting portions 812 and eight first fins 813 each. In addition, the number of the 1st connection part 812 and the 1st fin 813 which the 1st heat sink 81 has is not limited to eight pieces, The number other than eight may be sufficient.

The second heat sink 82 is made of the same material as that of the first heat sink 81 and is formed by pressing. As shown in FIG. 7, the second heat sink 82 includes a second base portion 821, a plurality of second connection portions 822, a plurality of second fins 823, and a protruding portion 824.
As shown in FIGS. 6 and 7, the second base portion 821 is formed in a ring shape and has an outer shape along the outer peripheral edge of the base material 71, and the first heat sink 81 is open on the inner side so that the first heat sink 81 can be arranged. . That is, the outer shape of the second base portion 821 is formed in substantially the same shape as the outer shape of the base material 71.

  The plurality of second connection portions 822 individually connect the second base portion 821 and the plurality of second fins 823, and extend from the inner peripheral edge of the second base portion 821 toward the rotation center axis 7j. The plurality of second connection portions 822 are provided at equal intervals in the rotation direction R, and the rotation center shaft 7j side is spaced apart from each other, and the first base portion 811 is openable. The plurality of second connection portions 822 are disposed along the second surface 71 </ b> B together with the second base portion 821.

The plurality of second fins 823 protrudes inside the second base portion 821 when viewed from the direction along the rotation center axis 7j. Like the first fin 813, the plurality of second fins 823 bend from one end of each of the plurality of second connection portions 822 in the rotation direction R to the opposite side of the base material 71 and move away from the rotation center axis 7j. It protrudes so that the distance from the 2nd connection part 822 becomes large.
The second heat sink 82 of the present embodiment has eight second connection portions 822 and eight second fins 823, respectively. Note that the number of the second connection portions 822 and the second fins 823 included in the second heat sink 82 is not limited to eight, and may be other than eight.

  As shown in FIG. 7, a pair of protrusions 824 are provided so as to protrude from the inner peripheral edge of the second base portion 821 and to face each other with the rotation center shaft 7j interposed therebetween. As shown in FIG. 8, the pair of protrusions 824 are formed so as to contact the first connection part 812 of the first heat sink 81 at a predetermined position in the rotation direction R. The first heat sink 81 and the second heat sink 82 are fixed to the base material 71 at positions where the pair of protrusions 824 are in contact with the first connection portion 812, and their positions are determined in the rotation direction R.

  Specifically, in the heat dissipating part 8H of the present embodiment, when the second heat sink 82 is rotated clockwise relative to the first heat sink 81, as shown in FIG. 1 contact part 812 contacts. Each second fin 823 is disposed at the center between the adjacent first fins 813 in the plurality of first fins 813. As described above, the second heat sink 82 is provided with the protruding portion 824 that can be locked to the first heat sink 81 in the rotation direction R of the heat radiating portion 8H.

The first heat sink 81 is fixed to the base material 71 by applying an adhesive between the first base portion 811 and the first connection portion 812 and the second surface 71B. The second heat sink 82 is fixed to the base material 71 by applying an adhesive between the second base portion 821 and the second connection portion 822 and the second surface 71B. Further, an adhesive is also applied between the motor Mo hub and the round holes 711 and 811a.
Thus, in the heat radiating portion 8H, the first base portion 811 of the first heat sink 81 is fixed to the base material 71 in the vicinity of the rotation center shaft 7j, and the second base portion 821 of the second heat sink 82 is in the vicinity of the outer peripheral edge portion of the base material 71. It is fixed to the base material 71. The first connection portion 812 and the second connection portion 822 are fixed to the base material 71 between the first base portion 811 and the second base portion 821.

  And the heat radiating device 8 rotates with a hub centering on the rotation center axis | shaft 7j by the drive of the motor Mo. The heat of the phosphor layer 62 that generates heat when irradiated with blue light (excitation light) is radiated by the heat radiating device 8.

As described above, according to the present embodiment, the following effects can be obtained.
(1) Since the second base 821 is fixed to the base material 71 in the second heat sink 82, the heat of the base material 71 that has generated heat can be directly received by the second base 821 and can be dissipated.
Further, the second base 821 is fixed to the base material 71 at a position different from the position where the first base 811 is fixed. Thereby, the heat radiating portion 8H receives the heat of the base material 71 in a wide range, and more efficient heat radiation is possible.

  (2) In the heat radiating portion 8H, the first base portion 811 is fixed to the base material 71 in the vicinity of the rotation center axis 7j, and the second base portion 821 is fixed to the base material 71 in the vicinity of the outer peripheral edge portion of the base material 71. The first connection portion 812 and the second connection portion 822 are fixed to the base material 71 between the first base portion 811 and the second base portion 821. As a result, the heat radiating portion 8H can receive heat from substantially the entire area of the base material 71, thereby enabling more efficient heat dissipation.

  (3) Since the optical device 6 further suppresses the heat generation of the phosphor layer 62, it is possible to emit light more efficiently, and the phosphor layer 62 is deteriorated (discolored or damaged) or peeled off from the base material 71. Etc. are further suppressed.

  (4) The second heat sink 82 is provided with a protrusion 824 that can be locked to the first heat sink 81 in the rotational direction of the heat radiating portion 8H. Accordingly, the first heat sink 81 and the second heat sink 82 can be disposed at predetermined positions in the rotation direction R by a simple operation of locking the protrusion 824 to the first heat sink 81. That is, the second fins 823 can be easily arranged at the center between the adjacent first fins 813 in the plurality of first fins 813. Therefore, the heat radiator 8 can be easily manufactured.

(Third embodiment)
Hereinafter, the heat dissipation device 9 according to the third embodiment will be described with reference to the drawings. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
FIG. 9 is a perspective view of the heat dissipation device 9. FIG. 10 is an exploded perspective view of the heat dissipation device 9. FIG. 11 is a plan view of the heat dissipation device 9.
The heat radiating device 9 includes a heat radiating portion 9H different from the heat radiating portion 7H of the first embodiment and the heat radiating portion 8H of the second embodiment, as shown in FIGS.

The heat radiating portion 9 </ b> H includes a first heat sink 91 and a second heat sink 92.
The first heat sink 91 and the second heat sink 92 are metal materials having high thermal conductivity, and are formed by molding or cutting.
As shown in FIGS. 10 and 11, the first heat sink 91 includes a first base 911 and a plurality of first fins 912.
The first base 911 is formed in a disk shape around the rotation center axis 7j, and a round hole 911a having the same shape as the round hole 711 is formed in the center.

  The plurality of first fins 912 project radially outward from the first base 911 when viewed from the direction along the rotation center axis 7j on the side opposite to the base 71 of the first base 911. The plurality of first fins 912 are formed in a rectangular shape when viewed in the rotation direction R, and the inner end (the rotation center shaft 7j side) end portion is separated from the round hole 911a. The first heat sink 91 of the present embodiment has 16 first fins 912. The number of the first fins 912 included in the first heat sink 91 is not limited to 16 and may be other than 16.

As shown in FIG. 10, the second heat sink 92 includes a second base 921 and a plurality of second fins 922.
As shown in FIG. 9, the second base 921 has an outer shape that is substantially the same size as the outer shape of the base material 71 and is formed in a disc shape, and an opening in which the first base 911 can be disposed at the center. 921a is formed. That is, the second base 921 is provided from the vicinity of the outer peripheral edge of the base material 71 to a position close to the first base 911 and is formed so as to surround the first base 911. Further, as shown in FIG. 11, the second base 921 is formed so as to overlap with a portion protruding outward from the first base 911 of the first fin 912 when viewed from the direction along the rotation center axis 7j.

  The plurality of second fins 922 protrude to the opposite side of the base 71 of the second base 921 and protrude radially. The second heat sink 92 of this embodiment has 16 second fins 922. The number of the second fins 922 included in the second heat sink 92 is not limited to 16, and may be other than 16.

  Further, the second fin 922 is formed in a rectangular shape when viewed from the rotation direction R. As shown in FIG. 11, the second fin 922 has an outer end that follows the outer end of the second base 921, and an inner (rotation center shaft 7 j side) end protrudes from the opening 921 a. It is separated from the first base 911.

In the heat dissipation device 9, after the second heat sink 92 is disposed on the base material 71, the first base 911 of the first heat sink 91 is disposed in the opening 921 a, and each second fin 922 is adjacent to the plurality of first fins 912. Arranged between the matching first fins 912 and assembled. The second heat sink 92 is fixed to the base material 71 by applying an adhesive between the second base 921 and the second surface 71B. The first heat sink 91 is fixed to the base 71 by applying an adhesive between the first base 911 and the second surface 71B. An adhesive is also applied between the motor Mo hub and the round hole 911a.
Although explanation is omitted, positioning of the first heat sink 91 and the second heat sink 92 in the rotation direction R is performed using a jig.

  And the heat radiating device 9 rotates with the hub around the rotation center shaft 7j by the drive of the motor Mo. The heat of the phosphor layer 62 that generates heat when irradiated with blue light (excitation light) is dissipated by the heat dissipating device 9.

As described above, according to the present embodiment, the following effects can be obtained.
The heat dissipation device 9 has a first base 911 and a second base 921 that are respectively fixed to the base material 71, and the second base 921 is provided from the vicinity of the outer peripheral edge of the base material 71 to a position close to the first base 911. ing. As a result, in the heat dissipation device 9, the areas of the first base portion 911 and the second base portion 921 that are fixed to the base material 71 are widely configured, so that the heat of the base material 71 is received more efficiently and the heat dissipation is further improved. It becomes possible to make it.

(Fourth embodiment)
Hereinafter, a projector according to a fourth embodiment will be described with reference to the drawings. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
The projector (not shown) of this embodiment includes a light source device 100 that is different from the light source device 4 of the first embodiment.
FIG. 12 is a schematic diagram illustrating a configuration of the light source device 100 of the present embodiment.
As shown in FIG. 12, the light source device 100 has a simpler configuration than the light source device 4 (see FIG. 2) of the first embodiment. Specifically, the light source device 100 includes a first light source unit 10, a collimating optical system 70, a dichroic mirror 103, a collimating condensing optical system 90, and a second light source unit in addition to the optical device 6 and the rotating device 4M included in the light source device 4. 710, a condensing optical system 760, a scattering plate 765, and a collimating optical system 770.

  The first light source unit 10 includes a semiconductor laser and emits blue light E (emission intensity peak: about 445 nm) as excitation light. The first light source unit 10 may be composed of one semiconductor laser or may be composed of a plurality of semiconductor lasers. The first light source unit 10 can also use a semiconductor laser that emits blue light having a wavelength other than 445 nm (for example, 460 nm).

The collimating optical system 70 includes a first lens 77 and a second lens 78, and makes the light emitted from the first light source unit 10 substantially parallel.
The dichroic mirror 103 has a function of reflecting the blue light E and passing the yellow light Y including red light and green light. The dichroic mirror 103 is disposed at an angle of 45 ° with respect to the optical axis of the first light source unit 10, and reflects the blue light E emitted from the first light source unit 10 and passing through the collimating optical system 70.

  The collimator condensing optical system 90 includes a first lens 95 and a second lens 96. The collimator condensing optical system 90 substantially parallelizes the function of condensing the blue light E reflected by the dichroic mirror 103 onto the wavelength conversion element 6A of the optical device 6 and the fluorescence (yellow light) emitted from the wavelength conversion element 6A. It has a function to do.

The second light source unit 710, the condensing optical system 760, the scattering plate 765, and the collimating optical system 770 are disposed on the opposite side of the dichroic mirror 103 from the collimating optical system 70.
The second light source unit 710 includes a semiconductor laser similar to the first light source unit 10 and emits blue light B.
The condensing optical system 760 includes a first lens 762 and a second lens 764, and substantially condenses the blue light B emitted from the second light source unit 710 on the scattering plate 765.

  The scattering plate 765 scatters the incident blue light B so as to obtain a light distribution similar to the light distribution of the yellow light Y emitted from the wavelength conversion element 6A. As the scattering plate 765, for example, polished glass (optical glass) can be used.

The collimating optical system 770 includes a first lens 772 and a second lens 774 and makes the light from the scattering plate 765 substantially parallel.
The blue light B collimated by the collimating optical system 770 is reflected by the dichroic mirror 103 to the side opposite to the collimating condensing optical system 90.

  The yellow light Y emitted from the first light source unit 10 and converted by the wavelength conversion element 6A passes through the dichroic mirror 103, and is combined with the blue light B emitted from the second light source unit 710 and reflected by the dichroic mirror 103. Then, the white light W is emitted to the first lens array 51 (see FIG. 2).

  The optical device 6 functions as described in the first embodiment. That is, the heat dissipation device 7 of the optical device 6 rotates with the hub about the rotation center axis 7j by driving the motor Mo. And the heat | fever of the fluorescent substance layer 62 which heat | fever-generates by irradiating blue light E is transmitted to the thermal radiation part 7H from the base material 71, and is thermally radiated by this thermal radiation part 7H. Note that the heat radiating device 8 or the heat radiating device 9 may be used instead of the heat radiating device 7.

  As described above, it is possible to provide the heat dissipating devices 7, 8, 9 and the optical device 6 that have the above-described effects even in an aspect having a simple configuration as in the light source device 100 of the present embodiment. Become.

Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be added to the above-described embodiment. A modification will be described below.
(Modification 1)
In the heat radiating portions 7H, 8H, and 9H of the above embodiment, the number of the first fins 723, 813, and 912 and the number of the second fins 733, 823, and 922 are formed in the same number. You may comprise the thermal radiation part from which the number of 2nd fins differs.
Further, the intervals between the plurality of first fins and the intervals between the plurality of second fins may not be equal.

(Modification 2)
In the heat dissipation device 7 of the first embodiment, the first base 721 and the second base 731 are stacked in the vicinity of the rotation center shaft 7j, and the first fin 723 and the second fin 733 are the first base 721 and the second base 731. However, it may have the following configuration. That is, the first base portion having a shape that follows the vicinity of the outer peripheral edge portion of the base material 71, the first heat sink having a plurality of first fins projecting inside the first base portion, and the first base portion are laminated. A second heat sink having a second base and a plurality of second fins projecting inside the second base, and having a plurality of second fins arranged between adjacent first fins in the plurality of first fins. The heat radiating part may be configured as described above.

(Modification 3)
In the 1st heat sink and the 2nd heat sink with which a thermal radiation part is provided, one may be formed by press work, and the other may be formed by molding processing or cutting processing.

(Modification 4)
Although the heat radiation parts 7H, 8H, and 9H of the embodiment include two heat sinks, a configuration including three or more heat sinks is also possible.
As a configuration including three heat sinks, for example, the following modes are possible.
As one example, a third heat sink having a third base fixed to the second base 731 and a plurality of third fins protruding outside the third base in the configuration of the heat radiating part 7H of the first embodiment. In addition, a heat dissipating part in which the third fin is disposed between the first fin 723 and the second fin 733 is possible.
As another example, a configuration in which a third heat sink shaped like the second heat sink 82 of the second embodiment is added to the configuration of the heat radiating portion 7H of the first embodiment, and the third fin of the third heat sink is the first fin. A heat dissipating part disposed between the first fin 723 and the second fin 733 is possible.
In the case of these configurations, it is desirable that the interval between the fins and the number of fins are set so that the heat radiating portion rotates in a balanced manner and the air flows appropriately.

(Modification 5)
The shapes of the first heat sink, the first fin, and the second fin of the second heat sink in the heat radiating unit are not limited to the shapes shown in the above embodiment, and may be, for example, the shapes shown in FIG.
FIG. 13 is a plan view of a heat radiating device 200 of a modified example, and is a diagram showing an image of the shapes of the first fins 211 and the second fins 221 of the first heat sink 210 and the second heat sink 220 provided in the heat radiating device 200. is there.

  As shown in FIG. 13, a plurality of first fins corresponding to the rotation direction R, that is, in a spiral shape from the inner side (rotation center axis 7j side) to the outer side so that the air resistance decreases as the heat dissipation device 200 rotates. 211, a plurality of second fins 221 may be formed, and a plurality of second fins arranged between adjacent first fins in the plurality of first fins 211 may be provided. According to this configuration, it is possible to reduce noise by reducing wind noise during rotation of the heat dissipation device 200, and it is possible to form an air flow from the inside to the outside. Heat dissipation is possible.

(Modification 6)
In the above embodiment, the configuration in which the heat dissipation portions 7H, 8H, and 9H are provided on the base 71 of the wavelength conversion element 6A is shown. And you may comprise the apparatus which provides the thermal radiation part provided with a 2nd heat sink. In the case of this configuration, the base material 471a and the heat radiating part provided on the base material 471a correspond to a heat radiating device, and the heat radiating device and the diffuse reflection part 471R provided on the base material 471a correspond to an optical device.

(Modification 7)
In the projector 1 according to the first embodiment, the optical device 6 and the diffusing device 47 are configured separately, but a projector including a device in which the optical device 6 and the diffusing device 47 are integrated is also possible. In this integrated device, the phosphor layer 62 in the optical device 6 and the diffuse reflection part 471R in the diffusion device 47 are provided on the same base material, and the heat radiation parts 7H, 8H, A configuration in which 9H is fixed is also possible.

FIG. 14 is a plan view schematically showing a base material 600 of this modification.
As shown in FIG. 14, the substrate 600 has a phosphor layer 610 and a diffuse reflection part 620 formed on one surface. The substrate 600 is formed in a disc shape, and the phosphor layer 610 is formed in a ring shape in the vicinity of the outer peripheral edge of the substrate 600. The diffuse reflection part 620 is formed in a ring shape inside the phosphor layer 610. And the structure which arrange | positions the thermal radiation part (illustration omitted) provided with a 1st heat sink and a 2nd heat sink on the other surface of this base material 600 is also possible.
In this configuration, the base material 600 and the heat radiating portion correspond to a heat radiating device, and the phosphor layer 610 and the diffuse reflection portion 620 provided on the heat radiating device and the base material 600 correspond to an optical device.

(Modification 8)
The heat radiating part 8H of the second embodiment is provided with a protrusion 824 on the second heat sink 82 so that the first heat sink 81 and the second heat sink 82 are arranged at predetermined positions in the rotation direction R. The locking projection may constitute a heat radiating portion provided on the first heat sink.
Further, the heat dissipation device 7 of the first embodiment is configured such that a pin-shaped jig is inserted into the positioning holes 721b and 731b so that the first heat sink 72 and the second heat sink 73 are positioned in the rotation direction R. However, instead of one positioning hole in the positioning holes 721b and 731b, a projecting portion that is locked to the other positioning hole may be provided. According to this configuration, the first heat sink 72 and the second heat sink 73 can be positioned in the rotation direction R without using a jig.

(Modification 9)
The base material 71 of the embodiment is not limited to a disk shape but may be a polygonal shape.

(Modification 10)
In the projector 1 of the embodiment, a transmissive liquid crystal panel is used as the light modulator 34, but a reflective liquid crystal panel may be used. Further, a micromirror type light modulation device such as a DMD (Digital Micromirror Device) may be used as the light modulation device.

(Modification 11)
The light modulation device 34 of the embodiment employs a so-called three-plate method using three light modulation devices 34R, 34G, and 34B, but is not limited thereto, and may adopt a single-plate method, or The present invention can also be applied to a projector including two or four or more light modulation devices.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 6 ... Optical apparatus, 7, 8, 9, 200 ... Radiation device, 7H, 8H, 9H ... Radiation part, 7j ... Rotation center axis, 34 ... Light modulation apparatus, 36 ... Projection optical apparatus, 47 ... Diffusion Apparatus, 71,600 ... Base material, 72, 81, 91, 210 ... First heat sink, 73, 82, 92, 220 ... Second heat sink, 211, 723, 813, 912 ... First fin, 221, 733, 823 , 922 ... second fin, 471 ... reflector, 471a ... base material, 471b ... reflective film, 472 ... rotating device, 610 ... phosphor layer, 471R, 620 ... diffuse reflector, 721,811,911 ... first base , 722, 812... First connecting portion, 731, 821, 921, second base portion, 732, 822, second connecting portion, 824, projection portion.

Claims (12)

A substrate;
A heat dissipating part fixed to the base material and rotatable together with the base material;
With
The heat radiating portion includes a first heat sink and a second heat sink,
The first heat sink is
A first base provided around the rotation center axis of the heat dissipating part and fixed to the base;
A plurality of first fins protruding outward from the first base as seen from the direction along the rotation center axis;
Have
The second heat sink is
A second base fixed to the first base or the substrate;
A plurality of second fins disposed between adjacent first fins of the plurality of first fins;
A heat dissipating device characterized by comprising: The heat dissipating device according to claim 1,
The second heat sink, wherein the second base is fixed to the first base. The heat dissipation device according to claim 2,
The first heat sink has a first connection portion that connects the first base and the first fin,
The second heat sink has a second connection portion that connects the second base portion and the second fin,
The first connection portion is disposed along the base material,
The heat dissipation device, wherein the second connection portion is bent from the second base portion along the base material. The heat dissipating device according to claim 1,
The second heat sink, wherein the second base is fixed to the base material. The heat dissipating device according to claim 4,
The heat radiation device, wherein the second fin protrudes inside the second base portion when viewed from a direction along the rotation center axis. The heat dissipating device according to claim 4 or 5,
The first heat sink has a first connection portion that connects the first base and the first fin and is disposed along the base material.
The second heat sink includes a second connection portion that connects the second base portion and the second fin and is disposed along the base material. The heat dissipating device according to claim 4 or 5,
The second base portion is formed so as to surround the first base portion and overlap with a portion of the first fin that protrudes outward from the first base portion when viewed from a direction along the rotation center axis. A heat dissipation device. It is a heat radiating device as described in any one of Claims 1-7,
One of the first heat sink and the second heat sink is provided with a protrusion that can be locked to the other in the rotation direction of the heat dissipation portion. It is a heat radiating device as described in any one of Claims 1-8,
At least one of the first heat sink and the second heat sink is formed of a sheet metal. The heat dissipation device according to any one of claims 1 to 9,
A phosphor layer that is provided on the base material of the heat dissipation device and emits light when the excitation light is incident thereon;
An optical device comprising: The heat dissipation device according to any one of claims 1 to 9,
A diffusive reflector provided on the base of the heat dissipation device, and diffusely reflects incident light;
An optical device comprising: A light source;
The optical device according to claim 10 or 11, wherein light emitted from the light source is incident;
A light modulation device for modulating light emitted from the optical device;
A projection optical device for projecting light emitted from the light modulation device;
A projector characterized by comprising:

Images