JP2017129748A - Position adjustment device, wavelength converter, diffuse reflection device, light source device and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position adjustment device capable of re-adjusting a position of a rotating wheel, and a wavelength converter, a diffuse reflection device, a light source device and a projector.SOLUTION: A position adjustment device includes: a coupling member coupled to a drive unit having a rotating wheel to which light is incident; and a position adjustment part being fixed to a predetermined position and adjusting a position of the coupling member in an incident direction of the light.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a position adjustment device, a wavelength conversion device, a diffuse reflection device, a light source device, and a projector.

2. Description of the Related Art Conventionally, there has been known a projector including an illumination device that includes a solid-state light source that emits excitation light and a wavelength conversion element that emits fluorescence when excited by the excitation light (see, for example, Patent Document 1).
Specifically, the projector described in Patent Document 1 includes an array light source, a collimator optical system, an afocal optical system, a first retardation plate, a homogenizer optical system, a prism, a first pickup optical system, a light emitting element (wavelength). Conversion device), a second retardation plate, a second pickup optical system, a diffuse reflection element, an integrator optical system, a polarization conversion element, and a superimposing optical system. Among these, the array light source, the collimator optical system, the afocal optical system, the first retardation plate, the homogenizer optical system, the prism, the second retardation plate, the second pickup optical system, and the diffuse reflection element are The prism, the first pickup optical system, the light emitting element (wavelength conversion element), the integrator optical system, the polarization conversion element, and the superimposing optical system are positioned on the first optical axis, and are orthogonal to the first optical axis. Located on the optical axis. The prism is disposed at a portion where the first optical axis and the second optical axis intersect.

  The array light source has a configuration in which a plurality of semiconductor lasers, which are solid light sources, are arranged in an array, and the S-polarized blue light emitted from the array light source is converted into a parallel light beam by a collimator optical system. Then, the beam diameter is adjusted by the afocal optical system. The polarization axis of the blue light is rotated by passing the blue light through the first retardation plate that is a half-wave plate, and a part of the blue light that is S-polarized light is converted to P-polarized light.

Of the S-polarized light and P-polarized light contained in the blue light, the S-polarized light is reflected by the polarization separation element of the prism, and the P-polarized light is transmitted through the polarization separation element.
The reflected S-polarized light is incident as excitation light on the phosphor layer of the light-emitting element via the first pickup optical system, thereby generating yellow fluorescence. This fluorescence is non-polarized light whose polarization direction is not aligned, passes through the first pickup optical system and the polarization separation element in the non-polarized state, and enters the integrator optical system.
On the other hand, the P-polarized light of the blue light transmitted through the polarization separation element passes through the second retardation plate and is converted into circularly polarized light, and is diffused by the diffuse reflection element (diffuse reflection device) via the second pickup optical system. Diffuse reflected. The blue light is incident again on the second pickup optical system and the second retardation plate, converted into S-polarized light, reflected by the polarization separation element, and incident on the integrator optical system.

The integrator optical system includes a first lens array having a plurality of first lenses and a second lens array having a plurality of second lenses corresponding to the plurality of first lenses, and includes the blue light and the fluorescence. The illumination light is divided into a plurality of partial light beams, and is superimposed on a light modulation device that is an illuminated area together with a superimposing optical system. A polarization conversion element is disposed between the integrator optical system and the superimposing optical system, thereby aligning the polarization direction.
Each color light (image light) modulated by each light modulation device is combined by a combining optical system, and then enlarged and projected onto a screen by a projection optical device.

JP-A-2015-106130

In the illumination device described in Patent Document 1, the fluorescence generated by the wavelength conversion device and the blue light diffusely reflected by the diffuse reflection device are combined by the polarization separation element and output to the integrator optical system. It is. For this reason, since it is necessary to match the luminous flux diameters of the fluorescence and the blue light, the wavelength conversion device and the diffuse reflection device include a jig or the like along the optical axis of the light incident on the wavelength conversion device and the diffuse reflection device. And is fixed with an adhesive or the like at a desired position.
However, in the illumination device described in Patent Document 1, the rotating wheel provided with the wavelength conversion layer, the diffusion reflection layer, and the like provided in the wavelength conversion device, the diffusion reflection device, and the like is formed with an adhesive or the like at a desired position. Since it is fixed, there is a problem that the position of the rotating wheel cannot be readjusted after the positions of the wavelength conversion device and the diffuse reflection device are fixed.

  SUMMARY An advantage of some aspects of the invention is that it provides a position adjusting device, a wavelength conversion device, a diffuse reflection device, a light source device, and a projector that can readjust the position of a rotating wheel. With the goal.

  The position adjusting device according to the first aspect of the present invention includes a connecting member connected to a driving device having a rotating wheel on which light is incident, a fixed member fixed at a predetermined position, and the position of the connecting member being determined by the incident direction of the light. And a position adjusting unit that adjusts the position of the connecting member after the position of the connecting member is adjusted.

  According to the first aspect, the position adjusting unit that adjusts the position of the connecting member connected to the drive device having the rotating wheel is configured to be able to readjust the position of the connecting member. The reusability and reworkability can be improved compared to the case where the position of the connecting member is adjusted by the adjusting portion and then fixed by an adhesive or the like.

  In the first aspect, the position adjustment unit has a through-hole extending in the light incident direction, and a fixed cylinder that accommodates at least a part of the coupling member in the through-hole so as to be slidable in the incident direction. A rotating cylinder provided around the fixed cylinder and rotating along a side surface of the fixed cylinder; a pin projecting radially outward of the connecting member; and a side surface of the fixed cylinder. , Extending in a direction along the incident direction, the first guide hole into which the pin is inserted and guiding the movement of the pin, and a side surface of the rotating cylinder, and extending in a direction inclined with respect to the incident direction. A second guide hole into which the pin is inserted and guides the movement of the pin; a first screw that surrounds a protrusion provided at an end of the connecting member and is screwed into the fixed cylinder; and the fixing A second screw that penetrates the cylindrical body and is screwed into the protruding portion Comprises a tip of said first screw is preferably in contact with the coupling member.

In the first aspect, even when the rotating cylinder rotates, the pin protruding from the connecting member is moved in the direction along the second guide hole of the pin by the first guide hole of the fixed cylinder. Movement is restricted. For this reason, the pin moves along the extending direction of the first guide hole extending along the incident direction of the light incident on the rotating wheel. As a result, the connecting member on which the pin protrudes moves along the incident direction, so that the driving device connected to the connecting member, and hence the rotating wheel of the driving device, is moved along the incident direction. Can do. Thereby, the light beam diameter of the light incident on the rotating wheel can be adjusted.
Further, the first screw surrounds the protruding portion provided at the end of the connecting member, is screwed into the fixed cylinder, and the tip of the first screw is in contact with the connecting member. The connecting member and the fixed cylinder can be firmly fixed while urging the member. Furthermore, since the second screw passes through the fixed cylinder and is screwed into the protruding portion, the connecting member can be biased toward the fixed cylinder.
According to this, the first screw biases the connecting member toward the rotating wheel, and the second screw biases the connecting member toward the fixed cylindrical body, so that the connecting member and the fixed cylindrical body can be firmly fixed. Therefore, rattling that occurs between the fixed cylinder and the connecting member can be suppressed. In addition, since the fixed cylinder and the connecting member are fixed by the first screw and the second screw, after the position of the connecting member is adjusted by the position adjusting unit, the connecting member and the fixed cylinder are fixed by an adhesive or the like. Reusability and reworkability can be further improved as compared with the case where it is performed.

In the first aspect, it is preferable that the rotating cylinder has a lever that rotates the rotating cylinder.
According to the first aspect, since the rotating cylinder has the lever for rotating the rotating cylinder, the user can easily rotate the rotating cylinder by operating the lever. Therefore, it is possible to easily adjust the position of the connecting member, and hence the rotating wheel to which the connecting member is connected.

In the first aspect, the fixed cylinder has a first opening having a shape along the rotation direction of the rotary cylinder on the opposite side to the incident direction, and extends outward in the radial direction of the fixed cylinder. It is preferable that an enlarged diameter portion is provided and a part of the lever is inserted through the first opening.
According to the first aspect, since a part of the lever is inserted into the first opening formed in the enlarged diameter portion that spreads outward in the radial direction of the fixed cylinder, the rotation range of the lever is the first opening. It can limit to the range of. Therefore, the position of the rotating wheel can be adjusted within an appropriate range.

In the first aspect, it is preferable to have a restricting portion that restricts movement of the lever.
According to the first aspect, since the restricting portion that restricts the movement of the lever is provided, the movement of the lever can be restricted after the position adjustment of the rotating wheel is executed. Therefore, the position of the rotating wheel can be kept good.

In the first aspect, the first screw and the second screw are provided coaxially, and the second screw has a shape that covers the first screw when viewed from the direction opposite to the incident direction. It is preferable.
According to the first aspect, since the first screw and the second screw are provided on the same axis, the connecting member and the fixing member are fixed as compared with the case where the first screw and the second screw are arranged at positions separated from each other. The cylinder can be securely fixed.
Moreover, since the 2nd screw is a shape which covers a 1st screw, possibility that a 1st screw will be rotated accidentally can be reduced. Furthermore, the possibility that dust adheres to the first screw can be reduced.

  In the first aspect, the position adjustment unit has a through-hole extending in the light incident direction, and a fixed cylinder that accommodates at least a part of the coupling member in the through-hole so as to be slidable in the incident direction. A pin projecting radially outward of the connecting member, a guide hole formed on a side surface of the fixed cylinder, extending in a direction along the incident direction, the pin being inserted, and guiding the movement of the pin A screw having a side part located on the opposite side of the incident direction of the fixed cylindrical body, a head part in contact with the side part and a shaft part screwed into a screwing part of the connecting member, and the connection It is preferable to include a biasing member that is disposed between the member and the side surface portion and biases the connecting member in the screw insertion direction.

According to the first aspect, even if the screw (shaft portion) is rotated, the pin is restricted from moving in the rotation direction of the screw by the guide hole of the fixed cylindrical body. The pin does not move in the rotation direction. For this reason, since the connecting member provided with the projecting pin does not move in the direction, the amount of screwing of the connecting member to the screwing portion is changed by the rotation of the shaft portion of the screw.
As described above, the connecting member provided with the pin is moved along the guide hole extending in the incident direction of the light incident on the rotating wheel. Therefore, the driving device connected to the connecting member, and thus the driving device has. The rotating wheel can be moved along the incident direction. Thereby, the light beam diameter of the light incident on the rotating wheel can be adjusted.
In addition, since the biasing member is disposed between the connecting member and the side surface portion and biases the connecting member in the screw insertion direction, the screw that is screwed into the connecting member and the screwed portion where the screw is screwed Can be suppressed by the biasing member.
Furthermore, since the fixed cylinder and the connecting member are fixed by the screw, the position of the connecting member is adjusted by the position adjusting unit, and then the connecting member and the fixed cylinder are fixed by an adhesive or the like. In addition, reusability and reworkability can be further improved.

In the first aspect, it is preferable that the biasing member is a coil spring, and the coil spring is disposed so as to surround the screw.
According to the first aspect, since the coil spring is disposed so as to surround the screw, rattling caused by a gap between the screw and the screwing portion can be reliably suppressed by the coil spring.

A wavelength conversion device according to a second aspect of the present invention includes the position adjustment device, and a wavelength conversion layer that is provided on a light incident side of the rotating wheel and converts the wavelength of the incident light. And
Examples of the wavelength conversion layer include a phosphor layer containing a phosphor.
In the second aspect, the same effects as those of the position adjusting device according to the first aspect can be obtained. Moreover, since the light beam diameter of the light incident on the wavelength conversion layer can be adjusted, the light beam diameter of the light incident on the wavelength conversion layer (phosphor layer) and converted and emitted from the wavelength can be adjusted.

A diffuse reflection device according to a third aspect of the present invention includes the position adjustment device, and a diffuse reflection layer that is provided on a light incident side of the rotating wheel and diffusely reflects the incident light. To do.
According to the said 3rd aspect, there can exist an effect similar to the position adjustment apparatus which concerns on the said 1st aspect. In addition, it is possible to adjust the light beam diameter of light incident on the diffuse reflection layer and diffusely reflected.

A light source device according to a fourth aspect of the present invention includes a light source and at least one of the wavelength conversion device and the diffuse reflection device.
The light source device according to the fourth aspect can achieve the same effects as at least one of the wavelength conversion device according to the second aspect and the diffuse reflection device according to the third aspect.

A light source device according to a fifth aspect of the present invention is a light combining device that synthesizes and emits light emitted from each of a light source, the wavelength conversion device, the diffuse reflection device, and the wavelength conversion device and the diffuse reflection device. At least one of the position adjustment devices provided in each of the wavelength conversion device and the diffuse reflection device, and a housing that houses the light source, the wavelength conversion device, the diffuse reflection device, and the photosynthesis device. The part is exposed outside the casing.
According to the fifth aspect, the light emitted from the light source is incident on the wavelength conversion device and the diffuse reflection device, and the light beam diameter of the light emitted from the wavelength conversion device and the diffuse reflection device can be adjusted. Light with a desired luminous flux diameter can be emitted. Moreover, since the position adjusting device provided in each of the wavelength conversion device and the diffuse reflection device is exposed outside the housing, the positions of the wavelength conversion layer and the diffuse reflection layer can be easily adjusted. Therefore, the brightness of the light emitted from the light source device and the light beam diameter of the light can be easily adjusted.

A projector according to a sixth aspect of the present invention includes the light source device, a light modulation device that modulates light emitted from the light source device, and a projection optical device that projects light modulated by the light modulation device. It is characterized by providing.
According to the said 6th aspect, there can exist an effect similar to the light source device which concerns on the said 4th aspect and the said 5th aspect. Moreover, since the light beam diameter adjusted light is emitted from the light source device, the brightness and saturation of the projection image emitted from the projector can be adjusted. Therefore, it is possible to suppress the occurrence of uneven color in the projected image.

1 is a perspective view showing an external appearance of a projector according to an embodiment of the invention. The schematic diagram which shows the structure of the apparatus main body which concerns on the said embodiment. The schematic diagram which shows the structure of the illuminating device which concerns on the said embodiment. The perspective view which shows the structure of the housing | casing for light source devices which concerns on the said embodiment. The perspective view which shows the 1st housing | casing which comprises the housing | casing for light source devices which concerns on the said embodiment. The perspective view which looked at the wavelength converter which concerns on the said embodiment from the light-incidence side. The perspective view which looked at the wavelength converter which concerns on the said embodiment from the opposite direction side to the light-incidence side. The disassembled perspective view of the wavelength converter which concerns on the said embodiment. The top view of the wavelength converter which concerns on the said embodiment. Sectional drawing of the wavelength converter which concerns on the said embodiment. The rear view of the wavelength converter which concerns on the said embodiment. The side view of the wavelength converter which concerns on the said embodiment. The perspective view which looked at the diffuse reflection apparatus which concerns on the said embodiment from the light-incidence side. The perspective view which looked at the diffuse reflection apparatus which concerns on the said embodiment from the opposite direction side to the light-incidence side. The disassembled perspective view of the diffuse reflection apparatus which concerns on the said embodiment. The top view of the diffuse reflection apparatus which concerns on the said embodiment. Sectional drawing of the diffuse reflection apparatus which concerns on the said embodiment. The rear view of the diffuse reflection apparatus which concerns on the said embodiment. The side view of the diffuse reflection apparatus which concerns on the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[External configuration of projector]
FIG. 1 is a perspective view showing an external appearance of a projector 1 according to the present embodiment.
The projector 1 according to the present embodiment modulates light emitted from a lighting device 41 described later to form an image according to image information, and projects the formed image on a projection surface such as a screen in an enlarged manner. Type image display device. The projector 1 has a configuration in which the wavelength conversion device 6 and the diffuse reflection device 7 that constitute the illumination device 41 have a configuration that suppresses a shift (backlash) at the time of fixing after position adjustment with respect to each optical axis orthogonal direction. This is one of the features.
As shown in FIG. 1, such a projector 1 includes an exterior housing 2 that configures an external appearance and accommodates an apparatus main body 3 (see FIG. 2) described later. The exterior casing 2 is configured in a substantially rectangular parallelepiped shape by combining an upper case 2A, a lower case 2B, a front case 2C, and a rear case 2D, each formed of a synthetic resin. Such an exterior housing 2 has a top surface portion 21, a bottom surface portion 22, a front surface portion 23, a back surface portion 24, a left side surface portion 25, and a right side surface portion 26.

When the projector 1 is placed on the placement surface, the bottom surface portion 22 is provided with leg portions 221 that come into contact with the placement surface in a detachable manner at a plurality of locations.
An opening 231 through which an image projected by the projection optical device 46 passes is formed at the central portion of the front portion 23 so as to expose an end 461 of the projection optical device 46 described later.
Further, an exhaust port 232 through which the heat-carrying cooling gas in the exterior housing 2 is discharged is formed at the position on the left side surface portion 25 side in the front portion 23, and a plurality of louvers 233 are formed in the exhaust port 232. Is provided.
On the other hand, a plurality of indicators 234 indicating the operating state of the projector 1 are provided at a position on the right side surface portion 26 side in the front portion 23.
The right side surface portion 26 is formed with an introduction port 261 for introducing outside air into the inside as a cooling gas, and a cover member 262 provided with a filter (not shown) is attached to the introduction port 261.

[Device configuration]
FIG. 2 is a schematic diagram showing the configuration of the apparatus main body 3.
The apparatus main body 3 includes an image projection apparatus 4 as shown in FIG. Further, although not shown, the apparatus main body 3 includes a control device that controls the operation of the projector 1, a power supply device that supplies power to the electronic components that constitute the projector 1, and a cooling device that cools the heating element. Among these, the control device, for example, outputs an image signal corresponding to image information input from the outside to the image projection device 4 and controls lighting of the plurality of indicators 234.

[Configuration of image projection apparatus]
The image projection device 4 forms an image corresponding to the image signal input from the control device, and projects the image on the projection surface PS. The image projection device 4 includes an illumination device 41, a color separation device 42, a collimating lens 43, a light modulation device 44, a color synthesis device 45, and a projection optical device 46.
Among these, the illumination device 41 emits illumination light WL that uniformly illuminates the light modulation device 44. The configuration of the illumination device 41 will be described in detail later.

The color separation device 42 separates the blue light LB, the green light LG, and the red light LR from the illumination light WL incident from the illumination device 41. The color separation device 42 includes dichroic mirrors 421 and 422, reflection mirrors 423, 424, and 425, relay lenses 426 and 427, and an optical component casing 428 that accommodates them.
The dichroic mirror 421 transmits the blue light LB included in the illumination light WL and reflects the green light LG and the red light LR. The blue light LB transmitted through the dichroic mirror 421 is reflected by the reflection mirror 423 and guided to the collimating lens 43 (43B).
The dichroic mirror 422 reflects the green light LG out of the green light LG and red light LR reflected by the dichroic mirror 421, guides it to the collimating lens 43 (43G), and transmits the red light LR. The red light LR is guided to the collimating lens 43 (43R) via the relay lens 426, the reflection mirror 424, the relay lens 427, and the reflection mirror 425.
The collimating lens 43 (the collimating lenses for red, green, and blue color lights are 43R, 43G, and 43B, respectively) collimates incident light.

The light modulation device 44 (respectively, light modulation devices for red, green, and blue color lights 44R, 44G, and 44B) modulate the incident color lights LR, LG, and LB from the control device. An image is formed for each of the color lights LR, LG, and LB corresponding to the input image signal. Each of these light modulation devices 44 includes, for example, a liquid crystal panel that modulates incident light and a pair of polarizing plates that are disposed on the incident side and the emission side of the liquid crystal panel.
The color synthesizer 45 synthesizes the images for the color lights LR, LG, LB incident from the light modulators 44R, 44G, 44B. In this embodiment, the color synthesizing device 45 is configured by a cross dichroic prism, but may be configured by a plurality of dichroic mirrors.
The projection optical device 46 enlarges and projects the image synthesized by the color synthesizing device 45 onto the projection surface PS. As such a projection optical device 46, for example, a combined lens composed of a lens barrel and a plurality of lenses arranged in the lens barrel can be adopted.

[Configuration of lighting device]
FIG. 3 is a schematic diagram showing the configuration of the illumination device 41.
The illumination device 41 emits the illumination light WL toward the color separation device 42 as described above. As shown in FIG. 3, the illumination device 41 includes a light source device 5 and a uniformizing device 9.

[Configuration of light source device]
The light source device 5 emits a light beam to the homogenizing device 9. The light source device 5 includes a light source unit 51, an afocal optical element 52, a first phase difference element 53, a homogenizer optical device 54, a light synthesis device 55, a first pickup optical device 56, a wavelength conversion device 6, and a second phase difference element 57. In addition to the second pickup optical device 58 and the diffuse reflection device 7, a light source device housing 8 (see FIG. 4) described later is provided.
Among these, the light source unit 51, the afocal optical element 52, the first phase difference element 53, the homogenizer optical device 54, the light synthesis device 55, the second phase difference element 57, the second pickup optical device 58, and the diffuse reflection device 7 are: It is arranged on the first illumination optical axis Ax1 set in the light source device casing 8. On the other hand, the first pickup optical device 56 and the wavelength conversion device 6 are also set in the light source device casing 8 and are disposed on the second illumination optical axis Ax2 orthogonal to the first illumination optical axis Ax1. The light synthesizing device 55 is disposed at the intersection of the first illumination optical axis Ax1 and the second illumination optical axis Ax2, and the second phase difference element 57, the second pickup optical device 58, and the diffuse reflection device 7 include a light source unit. 51, the afocal optical element 52, the first phase difference element 53, the homogenizer optical device 54, and the photosynthesis device 55 are positioned on the opposite side.

  In the following description, the traveling direction of the excitation light emitted from the light source unit 51 along the first illumination optical axis Ax1 is the + Z direction. The progress of the illumination light emitted from the light source device 5 along the second illumination optical axis Ax2 orthogonal to the first illumination optical axis Ax1 out of the + X direction and the + Y direction orthogonal to the + Z direction. The direction is the + X direction. Furthermore, the direction from the bottom surface portion 22 toward the top surface portion 21 is defined as a + Y direction. Although not shown, for convenience of explanation, the direction opposite to the + Z direction is set to the −Z direction. The same applies to the −X direction and the −Y direction.

[Configuration of light source section]
The light source unit 51 emits excitation light that is blue light toward the afocal optical element 52. The light source unit 51 includes a first light source unit 511, a second light source unit 512, and a light combining member 513.
The first light source unit 511 includes a solid light source array 5111 in which a plurality of solid light sources SS, which are LDs (Laser Diodes), are arranged in a matrix, and a plurality of parallel lenses (not shown) corresponding to the solid light sources SS. Have. Similarly, the second light source unit 512 includes a solid light source array 5121 in which a plurality of solid light sources SS are arranged in a matrix, and a plurality of parallel lenses (not shown) corresponding to the solid light sources SS. These solid light sources SS emit, for example, excitation light having a peak wavelength of 440 nm, but may emit excitation light having a peak wavelength of 446 nm. In addition, solid light sources that emit excitation light having peak wavelengths of 440 nm and 446 nm may be mixed in the light source units 511 and 512. The excitation light emitted from these solid light sources SS is collimated by a collimating lens and is incident on the light combining member 513. In the present embodiment, the excitation light emitted from each solid light source SS is S-polarized light.

The light combining member 513 transmits the excitation light emitted from the first light source unit 511 along the first illumination optical axis Ax1, and is emitted from the second light source unit 512 along the direction intersecting the first illumination optical axis Ax1. The excitation light thus reflected is reflected along the first illumination optical axis Ax1, and the respective excitation lights are synthesized. In this embodiment, the light combining member 513 includes a plurality of transmission units that transmit excitation light from the first light source unit 511 and a plurality of reflection units that reflect excitation light from the second light source unit 512 alternately. It is configured as an array of plate-like bodies. The excitation light that has passed through the light combining member 513 is incident on the afocal optical element 52.
In FIG. 3, in order to explain the function of the light combining member 513, the second light source unit 512 is arranged on the + X direction side with respect to the light combining member 513. However, in the present embodiment, the second light source unit 512 is located on the + Y direction side with respect to the photosynthetic member 513. However, the second light source unit 512 may be located on the + X direction side as shown in FIG. 3, or may be located on the −Y direction side or the −X direction side.

[Configuration of afocal optical element]
The afocal optical element 52 adjusts the beam diameter of the excitation light incident from the light source unit 51. Specifically, the afocal optical element 52 condenses the excitation light incident as parallel light from the light source unit 51 to reduce the beam diameter, and collimates the excitation light incident from the lens 521. And a lens 522 that emits light. The excitation light emitted from the light source unit 51 is collected by the afocal optical element 52 and is incident on the first phase difference element 53.

[Configuration of First Phase Difference Element]
The first phase difference element 53 is a half-wave plate. By passing through the first phase difference element 53, the S-polarized excitation light incident from the afocal optical element 52 is partially converted into P-polarized excitation light, and S-polarized light and P-polarized light are mixed. It becomes excitation light. The excitation light that has passed through the first phase difference element 53 is incident on the homogenizer optical device 54.
In the present embodiment, the first phase difference element 53 is configured to be rotatable around the optical axis of the first phase difference element 53 (coincident with the first illumination optical axis Ax1). By rotating the first phase difference element 53, the ratio of the S-polarized light and the P-polarized light of the excitation light transmitted through the first phase difference element 53 can be adjusted. As a result, the illumination emitted from the light source device 5 Light white balance can be adjusted.

[Configuration of homogenizer optical device]
The homogenizer optical device 54 is a uniformizing device that equalizes the illuminance distribution of the excitation light incident on the phosphor layer 612 that is the illuminated region in the wavelength conversion device 6 described later together with the first pickup optical device 56 described later. The excitation light transmitted through the homogenizer optical device 54 is incident on the photosynthesis device 55. Such a homogenizer optical device 54 includes a first multi-lens 541 and a second multi-lens 542.

The first multi-lens 541 has a configuration in which a plurality of first lenses 5411 are arranged in a matrix in a plane orthogonal to the first illumination optical axis Ax1, and the incident excitation light is converted into the plurality of first lenses 5411. Is divided into a plurality of partial luminous fluxes.
The second multi-lens 542 has a configuration in which a plurality of second lenses 5421 corresponding to the plurality of first lenses 5411 are arranged in a matrix in a plane orthogonal to the first illumination optical axis Ax1. The second multi-lens 542 cooperates with the second lenses 5421 and the first pickup optical device 56 to combine the plurality of partial light beams divided by the first lenses 5411 with the phosphor layer as the illuminated area. 612 is superimposed. Thereby, the illuminance in the plane orthogonal to the central axis of the excitation light incident on the phosphor layer 612 (in the plane orthogonal to the second illumination optical axis Ax2) is made uniform.
Of the multi lenses 541 and 542, the second multi lens 542 is a plane orthogonal to the first illumination optical axis Ax1 (+ Z direction) with respect to the first multi lens 541 when the light source device 5 is manufactured (assembled). It is configured to be movable along an orthogonal plane with respect to.

[Configuration of photosynthesis device]
The light combining device 55 is a PBS (Polarizing Beam Splitter) having a prism 551 formed in a substantially right-angled isosceles triangular prism shape, and a surface 552 corresponding to the hypotenuse of the first illumination optical axis Ax1 and the second illumination optical axis Ax2. Of the surfaces 553 and 554 corresponding to the adjacent sides, the surface 553 is substantially orthogonal to the second illumination optical axis Ax2, and the surface 554 is approximately orthogonal to the first illumination optical axis Ax1. To do. A polarization separation layer having wavelength selectivity is formed on the surface 552.

The polarization separation layer has a property of separating S-polarized light and P-polarized light contained in the excitation light, and also has a property of transmitting fluorescence generated by the wavelength conversion device 6 described later regardless of the polarization state of the fluorescence. . That is, the polarization separation layer separates S-polarized light and P-polarized light for light in the blue light region wavelength, but transmits S-polarized light and P-polarized light for light in the green light region and red light region. , Having wavelength-selective polarization separation characteristics.
Of such excitation light incident from the homogenizer optical device 54, the P-polarized light is transmitted to the second phase difference element 57 side along the first illumination optical axis Ax1, and the S-polarized light is The light is reflected toward the first pickup optical device 56 along the two illumination optical axes Ax2. That is, the photosynthesis device 55 emits P-polarized excitation light from the excitation light incident from the homogenizer optical device 54 toward the second phase difference element 57, and S-polarized excitation light to the first pickup optical device 56. Exit toward
As will be described in detail later, the light combining device 55 combines the fluorescence incident via the first pickup optical device 56 and the excitation light (blue light) incident via the second phase difference element 57. .

[Configuration of First Pickup Optical Device]
S-polarized excitation light that has passed through the homogenizer optical device 54 and reflected by the polarization separation layer is incident on the first pickup optical device 56. The first pick-up optical device 56 condenses (concentrates) the excitation light on the wavelength conversion element 61 (wavelength conversion layer) of the wavelength conversion device 6 and also collimates the fluorescence emitted from the wavelength conversion element 61. Then, the light is emitted toward the polarization separation layer. The first pickup optical device 56 includes three pickup lenses 561 to 563, but the number of lenses included in the first pickup optical device 56 is not limited to three.

[Configuration of wavelength converter]
The wavelength conversion device 6 converts the wavelength of incident excitation light into fluorescence. The wavelength conversion device 6 includes a wavelength conversion element 61, a rotation device 62, and a position adjustment device 63 that moves the wavelength conversion element 61 and the rotation device 62 along the second illumination optical axis Ax2.
Among these, the rotation device 62 corresponds to the drive device of the present invention, and is configured by a motor or the like that rotates the wavelength conversion element 61 formed in a flat plate shape.

The wavelength conversion element 61 includes a substrate 611, and a phosphor layer 612 and a reflection layer 613 that are located on the surface on the excitation light incident side of the substrate 611.
The substrate 611 corresponds to the rotating wheel of the present invention, and is formed in a substantially circular shape when viewed from the incident side of the excitation light. The substrate 611 can be made of metal, ceramics, or the like. The substrate 611 corresponds to the rotating wheel of the present invention.
The phosphor layer 612 includes a phosphor that is excited by incident excitation light and emits fluorescence that is non-polarized light (for example, fluorescence having a peak wavelength in a wavelength range of 500 to 700 nm). A part of the fluorescence generated in the phosphor layer 612 is emitted to the first pickup optical device 56 side, and the other part is emitted to the reflective layer 613 side.
The phosphor layer 612 corresponds to the wavelength conversion layer of the present invention.
The reflection layer 613 is disposed between the phosphor layer 612 and the substrate 611, and reflects the fluorescence incident from the phosphor layer 612 to the first pickup optical device 56 side.
When such a wavelength conversion element 61 is irradiated with excitation light, the fluorescence is diffused and emitted to the first pickup optical device 56 side by the phosphor layer 612 and the reflection layer 613. Then, the fluorescence enters the polarization separation layer of the light combining device 55 via the first pickup optical device 56, passes through the polarization separation layer along the second illumination optical axis Ax2, and enters the homogenization device 9. Is done. That is, the fluorescence generated in the wavelength conversion element 61 is emitted in the second illumination optical axis Ax2 direction (+ X direction) by the photosynthesis device 55.

The position adjusting device 63 is configured such that at least the position of the phosphor layer 612 is movable along the second illumination optical axis Ax2 with respect to the first pickup optical device 56. By moving the wavelength conversion device 6 (phosphor layer 612) in this manner, the irradiation range of the excitation light to the phosphor layer 612 can be adjusted. For this reason, the diameter of the fluorescent light beam diffused and emitted from the wavelength conversion device 6 can be adjusted, and consequently, the diameter of the fluorescent light beam traveling toward the homogenizing device 9 via the photosynthesis device 55 can be adjusted.
The detailed configuration of the position adjusting device 63 will be described later.

[Configuration of Second Phase Difference Element, Second Pickup Optical Device, and Diffusion Element]
The second phase difference element 57 is a ¼ wavelength plate, and converts the polarization state of the P-polarized excitation light (linearly polarized light) that is transmitted through the light combining device 55 and enters the circularly polarized light.
The second pickup optical device 58 is an optical device that focuses (converges) the excitation light transmitted through the second phase difference element 57 on the diffuse reflection device 7, and in the present embodiment, includes the three pickup lenses 581 to 583. . However, the number of lenses constituting the second pickup optical device 58 is not limited to three as in the first pickup optical device 56.
The diffuse reflection device 7 diffusely reflects incident excitation light (blue light) at a diffusion angle similar to that of the fluorescence diffused and emitted from the wavelength conversion device 6. The diffuse reflection device 7 includes a reflection plate 71 for Lambert reflection of incident light, a rotation device 72 for rotating and cooling the reflection plate 71, and a position adjustment device 73 for moving the reflection plate 71 and the rotation device 72. Have.
Among these, the position adjusting device 73 supports the reflecting plate 71 and the rotating device 72 so as to be movable along the first illumination optical axis Ax1. Since the reflecting plate 71 is moved in this way, the beam diameter of the excitation light incident on the reflecting plate 71 can be adjusted. Therefore, the beam diameter of the excitation light diffused by the diffuse reflection device 7, and thus the polarized light. The beam diameter of the excitation light reflected by the separation layer and traveling toward the homogenizer 9 can be adjusted. That is, the reflecting plate 71 constitutes the diffuse reflection layer and the rotating wheel of the present invention.
The detailed configuration of the position adjustment device 73 will be described later.

  The excitation light diffusely reflected by the diffuse reflection device 7 is incident on the second phase difference element 57 again via the second pickup optical device 58. When the light is reflected by the diffuse reflection device 7, the circularly polarized light incident on the diffuse reflection device 7 becomes a reverse circularly polarized light, and the reverse circular circle is transmitted through the second phase difference element 57 again. The polarized excitation light is converted into S-polarized excitation light whose polarization direction is rotated by 90 ° with respect to P-polarized light. The S-polarized excitation light is reflected by the polarization separation layer and is incident on the homogenizer 9 as blue light along the second illumination optical axis Ax2. That is, the excitation light diffusely reflected by the diffuse reflection device 7 is emitted by the light combining device 55 in the same direction as the traveling direction of the fluorescence passing through the light combining device 55.

  The pickup lenses 581 to 583 constituting the second pickup optical device 58 are configured to be movable along a plane orthogonal to the first illumination optical axis Ax1. As the lenses 581 to 583 are moved in this manner, the incident angle of the excitation light (blue light) diffused by the diffuse reflection device 7 with respect to the polarization separation layer, and consequently, the light reflected by the polarization separation layer is uniform. The inclination angle of the excitation light traveling toward the conversion device 9 with respect to the second illumination optical axis Ax2 can be adjusted. When the second multi-lens 542 of the homogenizer optical device 54 is moved, the optical path of the excitation light that has passed through the second multi-lens 542 is changed, so that the optical path of the excitation light that passes through the lenses 581 to 583. Will also be changed. Accordingly, the movement of the lenses 581 to 583 also has a function of supplementing the change of the optical path due to the movement of the second multi-lens 542 for blue light.

  In this way, among the excitation light incident on the photosynthesis device 55 via the homogenizer optical device 54, the S-polarized excitation light is wavelength-converted to the fluorescence by the wavelength conversion device 6 and then transmitted through the photosynthesis device 55. Is incident on the homogenizer 9. On the other hand, the P-polarized excitation light is diffused and reflected by being incident on the diffuse reflection device 7, transmitted twice through the second phase difference element 57, reflected by the light combining device 55, and reflected in the S-polarized blue color. Light is incident on the homogenizer 9. That is, the blue light, the green light, and the red light are combined by the light combining device 55, emitted in the second illumination optical axis Ax2 direction (+ X direction), and incident on the uniformizing device 9 as white illumination light.

[Configuration of homogenizer]
The uniformizing device 9 equalizes the illuminance on the plane orthogonal to the central axis of the illumination light incident from the light source device 5 (the plane orthogonal to the optical axis), and as a result, is illuminated in the light modulator 44 (44R, 44G, 44B). The illuminance distribution in the image forming area (modulation area) that is the area is made uniform. The homogenizing device 9 includes a first lens array 91, a second lens array 92, a polarization conversion element 93, and a superimposing lens 94. These configurations 91 to 94 are arranged such that their optical axes coincide with the second illumination optical axis Ax2.

The first lens array 91 has a configuration in which a plurality of small lenses 911 are arranged in a matrix on a plane orthogonal to the optical axis, and incident light is divided into a plurality of partial light beams by the plurality of small lenses 911. To do.
Similar to the first lens array 91, the second lens array 92 has a configuration in which a plurality of small lenses 921 are arranged in a matrix on the optical axis orthogonal plane, and each small lens 921 has a corresponding small lens 911. There is a one-to-one relationship. That is, a partial light beam emitted from a corresponding small lens 911 is incident on a certain small lens 921. The small lenses 921 superimpose a plurality of partial light beams divided by the small lenses 911 on the image forming area of each light modulator 44 together with the superimposing lens 94.
The polarization conversion element 93 is disposed between the second lens array 92 and the superimposing lens 94 and has a function of aligning the polarization directions of a plurality of incident partial light beams.

[Light path adjustment and light beam diameter adjustment in the light source device]
In the light source device 5, the second illumination optical axis Ax <b> 2, which is the optical axis of the uniformizing device 9, the optical path of the fluorescence and the optical path of the blue light emitted from the light source device 5 due to the positional deviation or tolerance of the optical components. May deviate from When a deviation occurs in the optical paths of the fluorescent light and the blue light, unevenness in illuminance occurs in the light modulation device 44 that is illuminated by the corresponding color light, thereby causing unevenness in the color of the projected image. For this reason, in the light source device 5, it is necessary to adjust the optical paths of the fluorescent light and the blue light emitted from the light source device 5.
In addition, even when the light flux diameters of the fluorescent light and the blue light emitted from the light source device 5 are different from each other, the uneven illuminance occurs, and as a result, uneven color occurs in the projected image.
Therefore, it is necessary to adjust the optical paths of the fluorescent light and blue light (optical axis adjustment) as described below, and also to adjust the respective light beam diameters.

First, each of the fluorescent light path and the light beam diameter, which is more powerful than blue light, is adjusted.
First, the second multi-lens 542 of the homogenizer optical device 54 is moved along a plane orthogonal to the first illumination optical axis Ax1, and the incident angle of the excitation light with respect to the wavelength converter 6 (phosphor layer 612) is adjusted. Thereby, it adjusts so that the central axis of the fluorescence radiate | emitted from the wavelength converter 6 and 2nd illumination optical axis Ax2 may correspond.
Then, the wavelength conversion device 6 is moved along the second illumination optical axis Ax2, and the fluorescence emitted from the light source device 5 to the homogenization device 9 is within the arrangement region of the small lenses 911 in the first lens array 91. The position of the phosphor layer 612 on the second illumination optical axis Ax2 is adjusted so as to be incident. Thereby, the luminous flux diameter of the fluorescence is adjusted.

Next, the blue light path and the light beam diameter are adjusted to match the fluorescent light path and the light beam diameter.
First, the pickup lenses 581 to 583 of the second pickup optical device 58 are moved along a plane orthogonal to the first illumination optical axis Ax1, and the incident position of the blue light incident on the diffuse reflection device 7, and thus the light combining device 55. The incident position of the blue light incident on is adjusted. As a result, the optical path of the blue light emitted from the light combining device 55 toward the first lens array 91 is adjusted so as to coincide with the optical path of the fluorescence traveling toward the first lens array 91.
Then, the diffuse reflection device 7 is moved along the first illumination optical axis Ax1, and the blue light is incident on the arrangement region of the small lenses 911 in the first lens array 91, and the fluorescence irradiation range and the blue The position of the diffuse reflection device 7 is adjusted so that the light irradiation range matches. Thereby, the luminous flux diameter of blue light is adjusted so as to coincide with the luminous flux diameter of fluorescence.

In this way, the optical path of the fluorescence and the optical path of the blue light coincide with each other and the luminous flux diameter of the fluorescence and the luminous flux diameter of the blue light coincide with each other. This suppresses the occurrence of uneven color in the projected image.
Note that, as described above, the first phase difference element 53 is configured to be rotatable about the first illumination optical axis Ax1, and thereby includes each of the excitation light passing through the first phase difference element 53. The ratio of P-polarized light and S-polarized light can be adjusted. For this reason, it is possible to adjust the ratio of the amount of excitation light directed from the light combining device 55 to the diffuse reflection device 7 and the amount of excitation light directed to the wavelength conversion device 6, in other words, the ratio of blue light to fluorescence. Therefore, the white balance of the illumination light WL emitted from the light source device 5 can be adjusted.

[Configuration of light source device casing]
FIG. 4 is a perspective view of the light source device housing 8 viewed from the + Z direction side.
As described above, the light source device housing 8 houses the above-described configurations 52 to 58, 6, and 7 at predetermined positions in the first illumination optical axis Ax1 and the second illumination optical axis Ax2 set inside. And connected to the light source unit 51. As shown in FIG. 4, the light source device housing 8 is positioned on the −Y direction side, and is positioned on the + Y direction side with the first housing 8 </ b> A to which the components 52 to 58, 6 and 7 are fixed. The second housing 8B that closes the first housing 8A is combined.
The light source device housing 8 corresponds to the housing of the present invention.

  The light source device housing 8 includes a first surface portion 81 located on the −Z direction side, a second surface portion 82 located on the + Z direction side, a third surface portion 83 located on the + Y direction side, and a first surface portion located on the −Y direction side. It has a fourth surface portion 84, a fifth surface portion 85 located on the −X direction side, and a sixth surface portion 86 located on the + X direction side, and the fifth surface portion 85 protrudes toward the −X direction side when viewed from the + Y direction side. It is formed in the substantially T shape.

FIG. 5 is a perspective view of the light source device housing 8 with the second housing 8B removed, as viewed from the + Z direction side.
As shown in FIG. 5, the first housing 8A includes a first notch 8A1 to which the wavelength conversion device 6 is fixed, and a second notch 8A2 to which the diffuse reflection device 7 is fixed. Among these, the first notch 8A1 is a substantially semicircular notch formed in the fifth surface portion 85. The position adjustment device 63 of the wavelength conversion device 6 is fitted into the first cutout 8A1, and the position adjustment device 63, and thus the wavelength conversion device 6, is fixed by attaching the second housing 8B.
The second cutout 8A2 is a substantially semicircular cutout formed in the second surface portion 82. The position adjustment device 73 of the diffuse reflection device 7 is fitted into the second notch 8A2, and the second housing 8B is attached, thereby fixing the position adjustment device 73, and hence the diffuse reflection device 7.

That is, the light source device housing 8 is exposed in a state in which a part of the position adjustment device 63 of the wavelength conversion device 6 and a part of the position adjustment device 73 of the diffuse reflection device 7 are exposed. The device 7 is accommodated and fixed.
In the present embodiment, although not shown, a cooling device that cools the wavelength conversion device 6 and a cover that circulates the cooling gas from the cooling device are provided so as to cover a part of the wavelength conversion device 6. In addition, the wavelength conversion device 6 is circulated and cooled by being covered with the cover.

[Configuration of wavelength converter]
6 is a perspective view of the wavelength conversion device 6 as viewed from the + X direction side, FIG. 7 is a perspective view of the wavelength conversion device 6 as viewed from the −X direction side, and FIG. It is a disassembled perspective view.
As shown in FIG. 8, the wavelength conversion element 61 includes streamline-shaped fins 614 that are fixed to the surface on the −X direction side of the substrate 611 in addition to the above configuration. By providing the fins 614, the cooling gas circulates through the substrate 611, and the substrate 611 and consequently the phosphor layer 612 are cooled.
A fixed plate 621 is provided on the surface of the rotation device 62 on the −X direction side. The fixing plate 621 is a portion to which a position adjusting device 63 (connecting member 631), which will be described later, is fixed, and an opening 6211 is formed in the approximate center of the fixing plate 621. The rotating device 62 is fitted in the opening 6211.
In addition, screw holes 6212 are formed at both ends of the fixed plate 621 with the opening 6211 interposed therebetween. A screw S1 is inserted into the screw hole 6212 through a connecting member 631 described later, and is fixed to the fixing plate 621.

[Configuration of position adjustment device]
The position adjustment device 63 moves the wavelength conversion element 61 and the rotation device 62 corresponding to the rotation wheel of the present invention along the X direction, and adjusts the beam diameter of the light incident on the wavelength conversion element 61. 6 to 8, the position adjusting device 63 includes a connecting member 631, a fixed cylinder 632, a rotating cylinder 633, a pin 634, a grip 635, a fixing screw 636, a first screw 637, and a second screw. 638 and screw S1.
Note that the fixed cylinder 632, the rotary cylinder 633, the pin 634, the grip 635, the fixing screw 636, the first screw 637, the second screw 638, and the screw S1 function as a position adjusting unit of the present invention.

[Composition of connecting members]
Among these, the connecting member 631 is a member that is connected to the fixed plate 621 of the rotating device 62 that rotationally drives the wavelength conversion element 61. The connecting member 631 includes a plate-like portion 6311, an extending portion 6312, and a protruding portion 6313.
The plate-like portion 6311 is formed in a substantially circular shape and is disposed to face the fixed plate 621. An extension portion 6312 extending in the −X direction is connected to a substantially central portion of the surface on the −X direction side of the plate-like portion 6311. In addition, a through hole 63111 is formed in each of the plate-like portion 6311 on the + Z direction side and the −Z direction side. A screw S1 is inserted into each of the through holes 63111, and the connecting member 631 is fixed to the fixing plate 621.

The extending part 6312 is a cylindrical part that extends in the −X direction from the substantially central part of the plate-like part 6311. The extending portion 6312 is disposed in a through hole 63211 of the fixed cylinder 632, which will be described later, and is supported so as to be movable in the X direction in the through hole 63211. In addition, three attachment portions 63121 are formed on the radially outer side of the extension portion 6312. These three attachment portions 63121 are formed in the 4 o'clock direction, the 8 o'clock direction, and the 12 o'clock direction, respectively, when the cylindrical extension portion 6312 is viewed along the −X direction. A pin 634, which will be described later, protrudes from these attachment portions 63121.
The protruding portion 6313 is a portion protruding in the direction from the surface 63122 (end portion) on the −X direction side of the extending portion 6312. A threaded portion 63131 that penetrates the projecting portion 6313 in the + X direction and is threaded with a second screw 638 described later is formed at a substantially central portion of the projecting portion 6313.

[Configuration of fixed cylinder]
The fixed cylinder 632 is a member that slidably accommodates the extending portion 6312 that is at least a part of the connecting member 631. As shown in FIGS. 6 to 8, the fixed cylindrical body 632 includes a cylindrical portion 6321, an enlarged diameter portion 6322, and a screwing portion 6323. The tubular portion 6321 is formed with a through-hole 63211 that penetrates the tubular portion 6321 in the direction along the X direction. The extending portion 6312 is inserted through the through-hole 63211.
In addition, three first guide holes 63212 are formed on the side surface of the fixed cylindrical body 632 (tubular portion 6321). These three first guide holes 63212 guide the movement of the pin 634. These first guide holes 63212 have a shape extending in the incident direction of light incident on the wavelength conversion element 61 (the direction along the −X direction), and the pins 634 are inserted into the first guide holes 63212. . Note that these first guide holes 63212 are formed at positions corresponding to the mounting portions 63121 of the extending portions 6312.
The threaded portion 6323 is a substantially donut-shaped member formed at a position on the −X direction side of the through hole 63211. The threaded portion 6323 is threadedly engaged with a first screw 637 described later.

The enlarged diameter portion 6322 is fixed at a position on the −X direction side of the cylindrical portion 6321 and is disposed outside the light source device casing 8. The enlarged diameter portion 6322 is formed in a plate shape that extends radially outward of the cylindrical portion 6321. Such a diameter-expanded portion 6322 includes a first opening 63221, a second opening 63222, and a third opening 63223. Among these, the 1st opening part 63221 is an opening part formed in the shape in alignment with the rotation direction of the rotating cylinder 633 mentioned later. In other words, the first opening 63221 is formed in a substantially arc shape. A grip portion 635 described later is inserted through the first opening 63221.
The second opening 63222 is an opening that is positioned in the −Y direction of the first opening 63221 and has substantially the same shape as the first opening 63221. A fixing screw 636 is inserted through the second opening 63222.
Furthermore, the third opening 63223 is an opening located on the −Y direction side of the second opening 63222. The third opening 63223 is a circular opening having a diameter larger than that of the through hole 63211 formed at a position facing the through hole 63211 of the cylindrical portion 6321. A first screw 637, which will be described later, is screwed into a screwing portion 6323 provided in the through hole 63211 via the third opening 63223.

[Configuration of rotating cylinder]
The rotating cylinder 633 is a cylinder that is provided around the fixed cylinder 632 and rotates along the side surface of the cylindrical portion 6321 of the fixed cylinder 632. As shown in FIGS. 6 to 8, the rotating cylinder 633 includes a cylindrical main body portion 6331 and an extending portion 6332 extending from the main body portion 6331. Among these, the main body portion 6331 is a cylindrical body extending along the X direction, and includes three second guide holes 63331.
These three second guide holes 63331 guide the movement of the pin 634. These second guide holes 63331 have a shape extending in an inclined manner with respect to the incident direction of light incident on the wavelength conversion element 61 (the direction along the −X direction). More specifically, the −Z direction end of the second guide hole 63331 is inclined so as to be positioned on the + X direction side of the + Z direction end of the second guide hole 63331. The pin 634 is inserted through the second guide hole 63331. Note that the second guide holes 63331 are formed at positions corresponding to the attachment portions 63121 of the extension portions 6312.

The extending portion 6332 is a portion that extends in the direction from the position on the + Y direction side at the end portion on the −X direction side of the main body portion 6331. The extending portion 6332 includes a through hole 63321 and a screwing hole 63322.
The through hole 63321 is a through hole provided at a position corresponding to the first opening 63221 of the enlarged diameter portion 6322. A grip portion 635 is fitted into the through hole 63321 through the first opening 63221. As a result, the user grips the grip portion 635 and moves the grip portion 635 along the first opening 63221, thereby rotating the rotating cylinder 633. That is, the gripping portion 635 and the extending portion 6332 constitute the lever of the present invention.
The screw hole 63322 is a screw hole provided at a position corresponding to the second opening 63222 of the enlarged diameter portion 6322. A fixing screw 636 is inserted into the screwing hole 63322 through the second opening 63222, and the fixing screw 636 is screwed. The head 6361 of the fixing screw 636 abuts against the surface on the −X direction side of the second opening 63222 and presses the surface by rotating the fixing screw 636 in the tightening direction. As a result, the rotating cylinder 633 is fixed at the position moved by the operation of the grip portion 635. That is, the fixing screw 636 and the enlarged diameter portion 6322 function as a restricting portion of the present invention that restricts movement of the grip portion 635 and the extending portion 6332 that function as the lever of the present invention.

[Pin configuration]
FIG. 9 is a plan view of the wavelength converter 6 viewed from the + Y direction side.
6 to 9, the pin 634 is a member that protrudes from the extending portion 6312, is guided by the first guide hole 63212 and the second guide hole 63331, and moves in the direction along the X direction. is there. That is, since the pin 634 protrudes from the extending portion 6312, the extending portion 6312 (the connecting member 631) moves in the same direction as the moving direction of the pin.
Such a pin 634 includes a bearing portion 6341, a contact portion 6342, and a screw 6343. This bearing portion 6341 is a portion fixed to the attachment portion 63121 of the extension portion 6312. The bearing portion 6341 is formed with a screwing portion into which the screw 6343 is screwed.
The contact portion 6342 is a portion that is disposed between the bearing portion 6341 and the screw 6343 and contacts the edge portions of the first guide hole 63212 and the second guide hole 63331. The abutting portion 6342 is formed in a cylindrical shape surrounding the periphery of the threaded portion of the bearing portion 6341.
The screw 6343 is screwed into a screwing portion formed in the bearing portion 6341 and the attachment portion 63121 through the contact portion 6342. As a result, a pin 634 is formed, and the pin 634 is guided by the first guide hole 63212 and the second guide hole 633311, whereby the connecting member 631, and thus the wavelength conversion element 61 moves along the X direction.

[Configuration of first screw]
10 is a cross-sectional view of the wavelength converter 6 taken along line A1-A1 in FIG. 9 as viewed from the -Z direction.
The first screw 637 is a screw provided on the same axis (X axis) as a second screw 638 described later, and has a function of suppressing rattling of the connecting member 631 and the fixed cylinder 632. The first screw 637 surrounds the protruding portion 6313 of the connecting member 631 and is screwed into the fixed cylinder 632.
As shown in FIGS. 8 and 10, the first screw 637 includes a main body portion 6371, a screwing portion 6372, a contact portion 6373, and a notch 6374. Among these, the main body portion 6371 is formed in a cylindrical shape. Further, the screwing portion 6372 is formed on the outer peripheral edge of the main body portion 6371. The threaded portion 6372 is a portion that is threadedly engaged with the threaded portion 6323 of the fixed cylindrical body 632.
The contact portion 6373 is a surface on the + X direction side of the main body portion 6371 and contacts the surface 63122 on the −X direction side of the extension portion 6312. Further, the notch 6374 is formed at an end portion of the main body portion 6371 on the −X direction side, and is a portion where a predetermined jig is attached to the notch 6374. With such a configuration, when the predetermined jig is mounted in the notch 6374 and rotated, the first screw 637 moves to the + X direction side and is screwed into the screwing portion 6323 of the fixed cylinder 632. The contact portion 6373 of the first screw 637 contacts the surface 63122. Accordingly, the first screw 637 can firmly fix the connecting member 631 and the fixed cylinder 632 while urging the connecting member 631 toward the + X direction.

[Configuration of second screw]
The second screw 638 is a screw provided coaxially with the first screw 637 and has a function of suppressing rattling of the connecting member 631 and the fixed cylindrical body 632. The second screw 638 passes through the fixed cylindrical body 632 (expanded diameter portion 6322) and is screwed into the screwed portion 63131 of the protruding portion 6313.
Such a second screw 638 includes a shaft portion 6381 and a head portion 6382. Among these, the shaft portion 6381 is a screwing portion extending in the + X direction, and the shaft portion 6381 is screwed into the screwing portion 63131 of the protruding portion 6313. The head 6382 has a shape that covers the first screw 637 when viewed from the −X direction side. Specifically, the head 6382 has a shape that extends radially outward and extends in the + X direction. The edge portion 6383 of the head portion 6382 comes into contact with the end portion on the −X direction side of the cylindrical portion 6321 of the fixed cylindrical body 632.
With such a configuration, the second screw 638 biases the connecting member 631 toward the −X direction. As described above, since the first screw 637 biases the connecting member 631 toward the + X direction, the first screw 637 and the second screw 638 interact with each other, and the connecting member 631 and the fixing member 631 are fixed. The cylindrical body 632 is firmly fixed.

[Position adjustment method of wavelength conversion element]
FIG. 11 is a plan view of the wavelength conversion device 6 viewed from the −X direction side, and FIG. 12 is a side view of the wavelength conversion device 6 viewed from the −Z direction side.
The beam diameter of light incident on the wavelength conversion element 61 of the wavelength conversion device 6 is adjusted by operating the position adjustment device 63. First, the user moves the grip portion 635 constituting the lever of the position adjustment device 63 in the + K1 direction. Thus, when the gripping portion 635 is moved in the + K1 direction, the rotating cylinder 633 is rotated in the + K1 direction.
Here, even if the rotating cylinder 633 is rotated in the + K1 direction, the pin 634 is restricted from moving in the + K1 direction by the first guide hole 63212 of the fixed cylinder 632. 634 does not move in the + K1 direction. Therefore, the pin 634 is pressed toward the + X direction side by the second guide hole 63331, and as shown in FIG. 12, along the first guide hole 63212 extending along the X direction, in the + T1 direction, that is, the + X direction. Moving.
As a result, the connecting member 631 on which the pin 634 protrudes moves in the + X direction, and thus the fixing plate 621 to which the connecting member 631 is fixed, and thus the wavelength conversion element 61 moves in the + X direction. Therefore, by moving the grip 635 in the + K1 direction, the wavelength conversion element 61 comes close to the first pickup optical device 56, and the diameter of the light beam incident on the wavelength conversion element 61 increases.

On the other hand, when the user moves the grip portion 635 constituting the lever of the position adjusting device 63 in the direction opposite to the + K1 direction (hereinafter referred to as the −K1 direction), the rotating cylinder 633 rotates in the −K1 direction.
Here, even when the rotating cylinder 633 is rotated in the −K1 direction, the pin 634 is moved in the −K1 direction by the first guide hole 63212 of the fixed cylinder 632 as described above. Since it is regulated, the pin 634 does not move in the −K1 direction. For this reason, the pin 634 is pressed toward the −X direction side by the second guide hole 63331, and as shown in FIG. 12, along the first guide hole 63212 extending along the X direction, the −T1 direction, that is, − Move in the X direction.
As a result, the connecting member 631 on which the pin 634 protrudes moves in the −X direction, and thus the fixing plate 621 to which the connecting member 631 is fixed, and thus the wavelength conversion element 61 moves in the −X direction. Therefore, by moving the grip 635 in the −K1 direction, the wavelength conversion element 61 is separated from the first pickup optical device 56, and the beam diameter of the light incident on the wavelength conversion element 61 is reduced.
As described above, when the user moves the grip portion 635 in the + K1 direction or the −K1 direction, the beam diameter of the light incident on the wavelength conversion element 61 is adjusted. And after the said adjustment is performed, the fixing screw 636 is fastened and the adjustment of the said light beam diameter is complete | finished.

[Configuration of diffuse reflection device]
FIG. 13 is a perspective view of the diffuse reflection device 7 fixed to the light source device housing 8 as seen from the −Z direction side, and FIG. 14 is a perspective view of the diffuse reflection device 7 as seen from the + Z direction side. FIG. 15 is an exploded perspective view of the diffuse reflector 7.
The reflection plate 71 is configured by a substrate having a diffuse reflection layer provided on the light incident side. As shown in FIGS. 13 to 15, in addition to the above configuration, the propeller fixed to the surface on the + Z direction side of the reflection plate 71. Shaped fins 711 are provided. By providing the fins 711, the cooling gas circulates in the reflecting plate 71 to cool the reflecting plate 71 and, consequently, the diffuse reflection layer.
A fixed plate 721 is provided on the surface on the + Z direction side of the rotating device 72. The fixing plate 721 is a portion to which a position adjusting device 73 (connecting member 731), which will be described later, is fixed, and an opening 7211 is formed in the approximate center of the fixing plate 721. A rotating device 72 is fitted in the opening 7211.
Further, three screw holes 7212 are formed in the vicinity of the outer edge of the opening 7211 of the fixing plate 721. The screw S2 is inserted into the screw hole 7212 via a connecting member 731 described later, and is fixed to the fixing plate 721.

[Configuration of position adjustment device]
The position adjusting device 73 moves the reflecting plate 71 and the rotating device 72 corresponding to the rotating wheel of the present invention along the Z direction, and adjusts the beam diameter of the light incident on the reflecting plate 71. As shown in FIGS. 13 to 15, the position adjusting device 73 includes a connecting member 731, a fixed cylindrical body 732, a pin 733, a side surface portion 734, an adjusting screw 735, an urging member SP, a frame body 736, a fixing screw 737, and A restriction screw 738 is provided.
Note that the fixed cylindrical body 732, the pin 733, the side surface portion 734, the adjustment screw 735, the biasing member SP, the frame body 736, the fixing screw 737, and the regulating screw 738 function as a position adjustment portion of the present invention.

[Composition of connecting members]
Among these, the connecting member 731 is a member that is connected to the fixed plate 721 of the rotating device 72 that rotates the reflecting plate 71. The connecting member 731 includes a main body portion 7311, a central plate portion 7312, a protruding portion 7313, a plurality of through holes 7314, and an attachment portion 7315.
The main body portion 7311 is formed in a substantially cylindrical shape and is disposed to face the fixed plate 721. A central plate portion 7312 that closes the cylindrical main body portion 7311 is provided inside the cylindrical main body portion 7311. A projecting portion 7313 projecting in the + Z direction is formed at the approximate center of the center plate portion 7312.
A screwing portion 73131 into which an adjusting screw 735 described later is screwed is formed at the approximate center of the protruding portion 7313. In addition, three through holes 7314 are formed around the protrusion 7313. The three through holes 7314 are provided at positions corresponding to the three screw holes 7212 of the fixing plate 721, and screws S 2 are inserted through the three through holes 7314 and screwed into the screw holes 7212. As a result, the connecting member 731 is fixed to the fixing plate 721.

  The main body 7311 is disposed inside a fixed cylinder 732 to be described later, and is supported so as to be movable along the Z direction in the fixed cylinder 732. In addition, three attachment portions 7315 are formed on the radially outer side of the main body portion 7311. These three attachment portions 7315 are formed in the 2 o'clock direction, the 6 o'clock direction, and the 10 o'clock direction, respectively, when the cylindrical main body portion 7311 is viewed along the + Z direction. A pin 733, which will be described later, protrudes from these attachment portions 7315.

[Configuration of fixed cylinder]
The fixed cylinder 732 is a member that accommodates the connecting member 731 in a slidable manner. As shown in FIGS. 13 to 15, the fixed cylinder 732 includes a cylindrical portion 7321 and a frame portion 7322. The connecting member 731 is inserted into the cylindrical portion 7321.
In addition, three third guide holes 7321 are formed on the side surface of the fixed cylinder 732 (tubular portion 7321). These three third guide holes 7321 guide the movement of the pin 733. These third guide holes 7321 have a shape extending in the incident direction of light incident on the reflecting plate 71 (the direction along the + Z direction), and the pin 733 is inserted into the third guide hole 7321. Note that the third guide holes 7321 are formed at positions corresponding to the mounting portions 7315 of the connecting member 731.

The frame portion 7322 is a ring-shaped portion that extends from the end on the + Z direction side of the tubular portion 7321 to the radially outer side of the tubular portion 7321. The frame portion 7322 is disposed outside the light source device housing 8. In the frame portion 7322, three screw holes 73221 and two screw holes 73222 are formed. Of these, the three screw holes 73221 are provided at the 4 o'clock, 8 o'clock, and 12 o'clock positions when the frame portion 7322 is viewed from the + Z direction side. A fixing screw 737 is screwed through a through hole 7361 of 736.
The two screw holes 73222 are provided at the 3 o'clock and 9 o'clock positions when the frame portion 7322 is viewed from the + Z direction side, and the regulation screw 738 is screwed into the two screw holes 73222. .

[Pin configuration]
FIG. 16 is a plan view of the diffuse reflection device 7 as seen from the + Y direction side.
As shown in FIGS. 13 to 16, the pin 733 is a member that protrudes from the connecting member 731, is guided by the third guide hole 7321, and moves in the direction along the Z direction. That is, the connecting member 731 moves in the same direction as the movement direction of the pin 733 in accordance with the movement of the pin 733.
Such a pin 733 includes a bearing portion 7331, a contact portion 7332 and a screw 7333. The bearing portion 7331, the abutting portion 7332, and the screw 7333 have the same shape as the bearing portion 6341, the abutting portion 6342, and the screw 6343, and thus description thereof is omitted. With such a configuration, the pin 733 is guided in the third guide hole 73211, whereby the connecting member 731 and, consequently, the reflecting plate 71 moves along the Z direction.

[Configuration of side section]
17 is a cross-sectional view of the diffuse reflector 7 taken along line B1-B1 of FIG. 16 as viewed from the -X direction.
As shown in FIGS. 13 to 15 and FIG. 17, the side surface part 734 is a plate-like member formed in a circular shape, and is a part located on the + Z direction side of the fixed cylinder 732. Specifically, the side surface portion 734 is supported by the surface on the + Z direction side of the frame portion 7322 of the fixed cylinder 732.
The side surface portion 734 includes a through hole 7341 at a substantially central portion. An adjustment screw 735, which will be described later, is inserted into the through-hole 7341, and is screwed into the threaded portion 73131 of the protruding portion 7313 of the connecting member 731.
Note that a nut 735A and an urging member SP attached to a shaft portion 7352 of an adjustment screw 735, which will be described later, abut on the surface 7342 on the −Z direction side of the side surface portion 734.

[Configuration of adjusting screw]
The adjustment screw 735 is inserted through the through hole 7341 of the side surface portion 734 and screwed into the screwing portion 73131 in the protruding portion 7313 of the connecting member 731. That is, the adjustment screw 735 has a function of moving the connecting member 731 along the Z direction by the rotation of the adjustment screw 735. The adjustment screw 735 includes a head portion 7351, a shaft portion 7352, and a nut 735A as shown in FIGS.
Among these, the head portion 7351 is a portion that abuts against the surface on the + Z direction side of the side surface portion 734. As shown in FIG. 15, a cutout 73511 is formed in the head 7351. When a predetermined jig is attached to the cutout 73511 and rotated, the adjustment screw 735 rotates.
The shaft portion 7352 extends from the head portion 7351 in the −Z direction and is formed with a thread groove, and is screwed into the screwed portion 73131 of the protruding portion 7313 of the connecting member 731. A nut 735A is fitted into the shaft portion 7352. That is, as shown in FIG. 17, the head portion 7351 is located on the + Z direction side of the side surface portion 734, the nut 735A is located on the −Z direction side of the side surface portion 734, and abuts against the surface of the side surface portion 734, respectively. ing. With such a configuration, rattling of the adjustment screw 735 is suppressed.

[Configuration of biasing member]
The biasing member SP is a member that is disposed between the connecting member 731 and the side surface portion 734 and biases the connecting member 731 in the insertion direction (−Z direction) of the adjustment screw 735. This urging member SP is constituted by, for example, a coil spring or the like, and as shown in FIG. 17, abuts on the surface on the + Z direction side of the central plate portion 7312 and the surface 7342 on the −Z direction side of the side surface portion 734, The side surface portion 734 is urged in the −Z direction.
Such a biasing member SP is disposed on the central plate portion 7312 so as to surround the periphery of the protruding portion 7313, and the shaft portion 7352 of the adjustment screw 735 is inserted through the center of the biasing member SP. In other words, the biasing member SP is disposed so as to surround the shaft portion 7352 of the adjustment screw 735. According to this, rattling of the adjustment screw 735 caused by a slight gap generated between the screw groove formed in the shaft portion 7352 of the adjustment screw 735 and the screwing portion 73131 of the protruding portion 7313 is suppressed.

[Frame structure]
The frame body 736 is a member located on the + Z direction side of the side surface portion 734. The frame body 736 is a metal plate formed in a substantially circular shape. Such a frame 736 has an opening 7360, three through holes 7361, and two recesses 7362 as shown in FIGS.
The opening 7360 is an opening provided substantially at the center of the frame 736, and the adjustment screw 735 can be adjusted via the opening 7360.
Further, three through holes 7361 are formed outside the opening 7360 of the frame body 736. A fixing screw 737 is inserted into the through hole 7361 and is screwed into a screw hole 73221 formed in the frame portion 7322 of the fixed cylinder 732 so as to sandwich the side surface portion 734. Accordingly, the frame body 736 is fixed to the fixed cylinder body 732.

  The two recesses 7362 are provided at the end on the + X direction side and the end on the −X direction side of the frame 736. These concave portions 7362 are concave portions having dimensions slightly larger than the diameter of the fixing screw 737 (the washer 7381 attached to the fixing screw 737). Therefore, even when the fixing screw 737 is screwed into the screw hole 73222 of the frame portion 7322 after the frame body 736 is fixed to the fixed cylinder body 732, the fixing screw 737 does not contact the frame body 736. .

[Configuration of regulating screw]
FIG. 18 is a plan view of the diffuse reflection device 7 as viewed from the + Z direction side.
The restriction screw 738 is a member that depresses the side surface portion 734 against the frame portion 7322 of the fixed cylindrical body 732 and restricts the rotation of the side surface portion 734. A washer 7381 is inserted through the shaft portion of the regulating screw 738. As shown in FIG. 18, the restriction screw 738 is screwed into the screw hole 73222 of the frame portion 7322. At this time, the washer 7381 inserted through the regulating screw 738 comes into contact with the vicinity of the edge of the side surface portion 734. That is, the + X direction side edge portion and the −X direction side edge portion of the side surface portion 734 are pressed against the frame portion 7322 by the washer 7381, and the rotation is restricted. Accordingly, even when the adjustment screw 735 is rotated in the + K2 direction and the direction opposite to the + K2 direction (hereinafter referred to as the −K2 direction), the adjustment screw 735 does not rotate in accordance with the rotation of the adjustment screw 735. .

[Reflector position adjustment method]
FIG. 19 is a side view of the diffuse reflection device 7 as viewed from the −X direction side.
The beam diameter of the light incident on the reflection plate 71 of the diffuse reflection device 7 is adjusted by operating the position adjustment device 73. First, the user moves the adjustment screw 735 of the position adjustment device 73 in the + K2 direction using a predetermined jig. Thus, when the adjustment screw 735 is rotated in the + K2 direction, the shaft portion 7352 of the adjustment screw 735 is rotated in the + K2 direction.
Here, even when the shaft portion 7352 rotates in the + K2 direction, the pin 733 is restricted from moving in the + K2 direction by the third guide hole 7321 of the fixed cylindrical body 732, and thus the pin 733. Does not move in the + K2 direction. For this reason, the connecting member 731 on which the pin 733 protrudes also does not move in the + K2 direction, so that the amount of screwing of the protruding portion 7313 to the screwing portion 73131 increases by the rotation of the shaft portion 7352 of the adjusting screw 735. To do.
Accordingly, the connecting member 731 on which the pin 733 protrudes moves in the + T2 direction shown in FIG. 19, that is, the + Z direction along the third guide hole 73211, and thus the fixing plate 721 to which the connecting member 731 is fixed. As a result, the reflecting plate 71 moves in the + Z direction. Therefore, by rotating the adjustment screw 735 in the + K2 direction, the reflecting plate 71 is separated from the second pickup optical device 58, and the beam diameter of the light incident on the reflecting plate 71 is reduced.

On the other hand, when the user rotates the adjustment screw 735 of the position adjusting device 73 in the direction opposite to the + K2 direction (hereinafter referred to as the −K2 direction), the shaft portion 7352 of the adjustment screw 735 rotates in the −K2 direction.
Here, even when the shaft portion 7352 rotates in the −K2 direction, the pin 733 is restricted from moving in the −K1 direction by the third guide hole 7321 of the fixed cylindrical body 732. The pin 733 does not move in the −K2 direction. For this reason, the connecting member 731 on which the pin 733 protrudes also does not move in the −K2 direction. Therefore, the rotation amount of the shaft portion 7352 of the adjusting screw 735 causes the amount of screwing of the protruding portion 7313 to the screwing portion 73131. Decrease.
As a result, the connecting member 731 on which the pin 733 protrudes moves along the third guide hole 7321 in the direction opposite to the + T2 direction shown in FIG. 19 (hereinafter referred to as the −T2 direction), that is, in the −Z direction. Therefore, the fixed plate 721 to which the connecting member 731 is fixed, and thus the reflective plate 71 moves in the −Z direction. Therefore, by rotating the adjustment screw 735 in the −K2 direction, the reflecting plate 71 comes close to the second pickup optical device 58, and the beam diameter of the light incident on the reflecting plate 71 is increased. Then, the adjustment of the light beam diameter is terminated.

[Effect of the embodiment]
The projector 1 according to the present embodiment described above has the following effects.
Position adjusting devices 63 and 73 for adjusting the positions of the connecting members 631 and 731 connected to the rotating devices 62 and 72 having the wavelength conversion element 61 and the reflecting plate 71 can adjust the positions of the connecting members 631 and 731 again. Since it is configured, for example, the reusability and the reworkability can be improved as compared with the case where the positions of the connecting members 631 and 731 are adjusted by the position adjusting device and then fixed by an adhesive or the like.

  Even when the rotating cylinder 633 rotates, the pin 634 protruding from the connecting member 631 is moved in the direction along the second guide hole 63331 of the pin 634 by the first guide hole 63212 of the fixed cylinder 632. Movement is regulated. For this reason, the pin 634 moves along the extending direction of the first guide hole 63212 extending along the incident direction (the direction along the X direction) of the light incident on the wavelength conversion element 61. As a result, the connecting member 631 on which the pin 634 protrudes moves along the X direction. Therefore, the rotating device 62 connected to the connecting member 631, and thus the rotating device 62 and the wavelength conversion element 61 are moved in the X direction. Can be moved along. Thereby, the light beam diameter of the light incident on the wavelength conversion element 61 can be adjusted.

Further, the first screw 637 surrounds the protruding portion 6313 provided at the end of the connecting member 631, and is screwed into the screwed portion 6323 of the fixed cylindrical body 632, and the tip of the first screw 637 (contact portion 6373). Since the contact member 631 is in contact with the connection member 631, the connection member 631 and the fixed cylindrical body 632 can be firmly fixed while the connection member 631 is urged by the first screw 637. Furthermore, since the second screw 638 passes through the fixed cylinder 632 and is screwed into the screw part 63131 of the protrusion 6313, the connecting member 631 can be biased toward the fixed cylinder 632.
According to this, the first screw 637 biases the connecting member 631 toward the wavelength conversion element 61, and the second screw 638 biases the connecting member 631 toward the fixed cylinder 632, so that the connecting member 631 and the fixed cylinder The body 632 can be firmly fixed. Therefore, rattling that occurs between the fixed cylinder 632 and the connecting member 631 can be suppressed. Further, since the fixed cylinder 632 and the connecting member 631 are fixed by the first screw 637 and the second screw 638, the position adjusting device 63 adjusts the position of the connecting member 631, and then the connecting member 631 and the fixed cylinder. Compared with the case where the body 632 is fixed by an adhesive or the like, the reusability and the reworkability can be further improved.

  Since the rotating cylinder 633 includes the extending part 6332 and the gripping part 635 that function as a lever for rotating the rotating cylinder 633, the user can easily operate the rotating cylinder 633 by operating the gripping part 635. Can be rotated. Therefore, the positions of the connecting member 631 and, consequently, the wavelength conversion element 61 and the rotating device 62 to which the connecting member 631 is connected can be easily adjusted.

  Since the gripping portion 635 that is a part of the lever is inserted into the first opening 63221 formed in the enlarged diameter portion 6322 that spreads outward in the radial direction of the fixed cylinder 632, the rotation range of the lever (gripping portion 635) Can be limited to the range of the first opening 63221. Therefore, the position of the wavelength conversion element 61 can be adjusted within an appropriate range.

  Since the fixing screw 636 is provided as a restricting portion for restricting the movement of the gripping portion 635 functioning as a lever, the movement of the lever (gripping portion 635) can be restricted after the position adjustment of the wavelength conversion element 61 is executed. . Therefore, the adjusted position of the wavelength conversion element 61 can be kept good.

Since the first screw 637 and the second screw 638 are provided on the same axis, the connecting member 631 and the fixed cylinder 632 are compared with the case where the first screw 637 and the second screw 638 are arranged at positions apart from each other. Can be securely fixed.
Moreover, since the 2nd screw 638 is a shape which covers the 1st screw 637, possibility that the 1st screw 637 may be rotated accidentally can be reduced. Further, the possibility of dust adhering to the first screw 637 can be reduced.

Even when the adjusting screw 735 (shaft portion 7352) of the position adjusting device 73 is rotated, the pin 733 is moved in the rotating direction of the adjusting screw 735 by the third guide hole 7321 of the fixed cylinder 732. Therefore, the pin 733 does not move in the rotation direction. For this reason, the connecting member 731 on which the pin 733 protrudes also does not move in this direction, so that the threaded portion 73131 formed on the protruding portion 7313 of the connecting member 731 by the rotation of the shaft portion 7352 of the adjusting screw 735. The amount of screwing to changes.
As described above, the connecting member 731 provided with the projecting pin 733 moves along the third guide hole 7321 extending in the incident direction of the light incident on the reflecting plate 71, and thus the rotating device connected to the connecting member 731. 72 and the reflecting plate 71 can be moved along the incident direction. Thereby, the light beam diameter of the light incident on the reflecting plate 71 can be adjusted.

Further, since the biasing member SP is disposed between the connecting member 731 and the side surface portion 734 and biases the connecting member 731 in the insertion direction of the adjusting screw 735, the adjusting screw 735 screwed into the connecting member 731; Shaking caused by the gap with the screwing portion 73131 to which the adjustment screw 735 is screwed can be suppressed by the biasing member SP.
Further, since the fixed cylinder 732 and the connecting member 731 are fixed by the adjustment screw 735, after the position of the connecting member 731 is adjusted by the position adjusting device 73, the connecting member 731 and the fixed cylinder 732 are adhesives or the like. Reusability and reworkability can be further improved as compared with the case of fixing by.
In addition, since the urging member SP is constituted by a coil spring and the urging member SP is disposed so as to surround the adjusting screw 735, the urging member SP is generated due to a gap between the adjusting screw 735 and the screwing portion 73131. Shaking can be reliably suppressed by the biasing member SP.

Since the light beam diameter of the light incident on the wavelength conversion element 61 can be adjusted, the light beam diameter of the fluorescence incident on the phosphor layer 612 of the wavelength conversion element 61 and converted and emitted from the wavelength can be adjusted.
In addition, it is possible to adjust the beam diameter of light that is incident on the diffuse reflection layer of the reflection plate 71 and diffusely reflected.

The light emitted from the light source 51 is incident on the wavelength conversion device 6 and the diffuse reflection device 7, and the diameter of the light emitted from the wavelength conversion device 6 and the diffuse reflection device 7 can be adjusted. It is possible to emit light with a beam diameter of. In addition, since part of the position adjusting devices 63 and 73 provided in the wavelength conversion device 6 and the diffuse reflection device 7 are exposed outside the light source device housing 8, the wavelength conversion element 61 and the reflection plate 71. The position can be adjusted easily. Therefore, the brightness of the light emitted from the light source device 5 and the light beam diameter of the light can be easily adjusted, and consequently the white balance of the light emitted from the light source device 5 can be adjusted.
Moreover, since the light beam diameter and the light with the adjusted white balance are emitted from the light source device 5, the brightness and saturation of the projection image emitted from the projector 1 can be adjusted. Therefore, it is possible to suppress the occurrence of uneven color in the projected image.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above embodiment, the rotating cylinder 633 includes the extending portion 6332 that functions as a lever. However, the present invention is not limited to this, and for example, the rotating cylinder 633 may not include the extending portion 6332. In this case, the user can adjust the position of the connecting member 631 and thus the wavelength conversion element 61 by holding the rotating cylinder 633 and rotating the rotating cylinder 633.

  In the above embodiment, the fixed cylinder 632 includes the enlarged diameter portion 6322 and the first opening 63221 formed in the enlarged diameter portion 6322. However, the present invention is not limited to this, and, for example, the fixed cylinder 632 may not include the enlarged diameter portion 6322 and the first opening 63221 formed in the enlarged diameter portion 6322. In this case, the user can move the grip portion 635 to a position outside the predetermined range restricted by the first opening portion 63221, and can further increase the moving distance of the connecting member 631 and thus the wavelength conversion element 61.

  In the above embodiment, the fixing screw 636 is provided as a restricting portion that restricts the movement of the extending portion 6332 and the grip portion 635 that function as a lever. However, the present invention is not limited to this. For example, a restricting portion different from the fixing screw 636 may be provided as the restricting portion, or the restricting portion may not be provided. Even in this case, the position of the wavelength conversion element 61 after the position adjustment can be maintained by the above action of the first screw 637 and the second screw 638.

In the above embodiment, the first screw 637 and the second screw 638 are provided coaxially. However, the present invention is not limited to this. For example, the first screw 637 and the second screw 638 may not be provided on the same axis. Even in this case, the same effects as in the above embodiment can be obtained.
Further, the second screw 638 has a shape that covers the first screw 637. However, the present invention is not limited to this. For example, the second screw 638 may not have a shape that covers the first screw 637. Even in this case, since the first screw 637 and the second screw 638 interact with each other, the same effect as in the above embodiment can be obtained.

  In the above embodiment, the position adjustment device 63 of the wavelength conversion device 6 moves the position of the wavelength conversion element 61 by operating the grip portion 635 after the first screw 637 and the second screw 638 are attached. . However, the present invention is not limited to this. For example, the first screw 637 may be attached to the position after the wavelength conversion element 61 is moved to a desired position by the operation of the grip portion 635. In this case, since the first screw 637 can be reliably brought into contact with the surface 63122, the connecting member 631 and the fixed cylinder 632 can be firmly fixed. Therefore, the occurrence of rattling can be more reliably suppressed.

  In the above embodiment, the urging member SP is configured by a coil spring. However, the present invention is not limited to this. For example, the urging member SP may not be configured by a coil spring. Further, when the biasing member SP is not configured by the coil spring, the biasing member SP may not be disposed around the adjustment screw 735.

  In the above embodiment, the position adjustment device 73 of the diffuse reflection device 7 includes the regulation screw 738. However, the present invention is not limited to this. For example, the position adjustment device 73 may not include the restriction screw 738. In this case, for example, instead of the side surface portion 734, an adjustment screw including a head having substantially the same shape as the side surface portion 734 may be provided. According to this, even if the side surface portion 734 is not provided, the same effect as that of the above embodiment can be obtained.

  In each of the above embodiments, the light modulation device 44 (44R, 44G, 44B) is used. However, the present invention is not limited to this. For example, instead of the transmission type light modulation device 44 (44R, 44G, 44B), a reflection type light modulation device may be used. In this case, color separation and color composition may be executed by the color composition device 45 without providing the color separation device 32.

In the above embodiment, the projector 1 includes the three light modulation devices 44 (44R, 44G, 44B). However, the present invention is not limited to this, that is, two or less, or four or more light modulation devices are used. The present invention can also be applied to projectors that have been used.
In addition, as long as the light modulation device can modulate an incident light beam and form an image according to image information, a device using a micromirror, for example, a device using a DMD (Digital Micromirror Device) or the like can be used. A light modulation device may be used.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 41 ... Illumination device, 44 ... Light modulation device, 46 ... Projection optical device, 5 ... Light source device, 51 ... Light source part (light source), 55 ... Photosynthesis device, 56 ... Wavelength conversion device, 61 ... Wavelength conversion element 611 ... Substrate (rotor wheel), 612 ... phosphor layer (wavelength conversion layer), 613 ... reflective layer, 62 ... rotating device (drive device), 63 ... position adjusting device, 631 ... connecting member, 6311 ... plate-like 63111 ... through-hole, 6312 ... extension part, 63121 ... attachment part, 63122 ... surface, 6313 ... projection part, 63131 ... screwing part, 632 ... fixed cylinder (position adjustment part), 6321 ... cylindrical part, 6321 ... Through-hole, 63212 ... First guide hole, 6322 ... Expanded diameter part, 63221 ... First opening, 63222 ... Second opening, 63223 ... Third opening, 6323 ... Screwing part, 633 ... Rotating cylinder ( Position adjustment part), 6331 ... main body part, 63311 ... second guide hole, 6332 ... extension part (lever), 63321 ... through hole, 63322 ... screwing hole, 634 ... pin (position adjustment part), 6341 ... bearing part , 6342 ... abutting part, 635 ... gripping part (position adjusting part / lever), 636 ... fixing screw (regulating part), 6361 ... head, 637 ... first screw, 6371 ... main body part, 6372 ... screwing part, 6373 ... Abutting part, 6374 ... Notch, 638 ... Second screw, 6381 ... Shaft part, 6382 ... Head part, 6383 ... Edge part, 7 ... Diffuse reflection device, 71 ... Reflecting plate (rotating wheel), 72 ... Rotating device (Drive device), 721 ... fixing plate, 7211 ... opening, 7212 ... hole, 73 ... position adjusting device, 731 ... connecting member, 7311 ... main body, 7312 ... center plate, 7313 ... projection, 73131 ... screwing Part 7 DESCRIPTION OF SYMBOLS 14 ... Through-hole, 7315 ... Attachment part, 732 ... Fixed cylinder (position adjustment part), 7321 ... Cylindrical part, 7321 ... 3rd guide hole (guide hole), 7322 ... Frame part, 73221 ... Hole, 73222 ... Hole 733 ... Pin (position adjustment part), 7331 ... Bearing part, 734 ... Side face part (position adjustment part), 7341 ... Through hole, 7342 ... Surface, 735 ... Adjustment screw (position adjustment part / screw), 7351 ... Head , 73511 ... notch, 7352 ... shaft part, 735A ... nut, 736 ... frame (position adjusting part), 7360 ... opening, 7361 ... through hole, 7362 ... recessed part, 737 ... fixing screw (position adjusting part), 738 ... Restricting screw (position adjusting unit), 7381... Washer, 8.

Claims (13)

A coupling member coupled to a drive device having a rotating wheel on which light is incident;
A position adjusting unit that is fixed at a predetermined position and adjusts the position of the connecting member along the incident direction of the light,
The position adjusting device is configured to be able to readjust the position of the connecting member after adjusting the position of the connecting member. The position adjusting device according to claim 1,
The position adjusting unit is
A fixed cylindrical body having a through hole extending in the light incident direction, and accommodating at least a part of the coupling member in the through hole so as to be slidable in the incident direction;
A rotating cylinder that is provided around the fixed cylinder and rotates along a side surface of the fixed cylinder;
A pin projecting radially outward of the connecting member;
A first guide hole formed on a side surface of the fixed cylinder, extending in a direction along the incident direction, the pin being inserted, and guiding the movement of the pin;
A second guide hole formed on a side surface of the rotating cylinder, extending in a direction inclined with respect to the incident direction, the pin being inserted, and guiding the movement of the pin;
A first screw that surrounds a protrusion provided at an end of the connecting member and is screwed into the fixed cylinder;
A second screw that penetrates through the fixed cylinder and is screwed into the protruding portion,
A position adjusting device, wherein a tip of the first screw is in contact with the connecting member. The position adjusting device according to claim 2,
The position adjusting device, wherein the rotating cylinder includes a lever that rotates the rotating cylinder. In the position adjustment device according to claim 3,
The fixed cylinder has a first opening having a shape along the rotation direction of the rotary cylinder on the opposite side to the incident direction, and includes a diameter-expanded portion that extends outward in the radial direction of the fixed cylinder,
A part of the lever is inserted into the first opening, and the position adjusting device is characterized in that: The position adjusting device according to claim 4,
A position adjusting device comprising a restricting portion for restricting movement of the lever. In the position adjustment device according to any one of claims 2 to 5,
The first screw and the second screw are provided coaxially,
The position adjusting device according to claim 1, wherein the second screw has a shape that covers the first screw when viewed from a direction opposite to the incident direction. The position adjusting device according to claim 1,
The position adjusting unit is
A fixed cylindrical body having a through hole extending in the light incident direction, and accommodating at least a part of the coupling member in the through hole so as to be slidable in the incident direction;
A pin projecting radially outward of the connecting member;
A guide hole that is formed on a side surface of the fixed cylinder, extends in a direction along the incident direction, the pin is inserted, and guides the movement of the pin;
A side surface portion located on the opposite side of the incident direction of the fixed cylinder;
A screw having a head portion that contacts the side surface portion and a shaft portion that is screwed into the screwing portion of the connecting member;
And a biasing member disposed between the coupling member and the side surface portion and biasing the coupling member in the screw insertion direction. The position adjusting device according to claim 7,
The biasing member is a coil spring;
The position adjusting device, wherein the coil spring is disposed so as to surround the screw. The position adjusting device according to any one of claims 1 to 8,
A wavelength conversion device comprising: a wavelength conversion layer provided on a light incident side of the rotating wheel and configured to convert a wavelength of the incident light. The position adjusting device according to any one of claims 1 to 8,
A diffuse reflection device, comprising: a diffuse reflection layer provided on a light incident side of the rotating wheel and configured to diffusely reflect the incident light. A light source;
A light source device comprising: at least one of the wavelength conversion device according to claim 9 and the diffuse reflection device according to claim 10. A light source;
The wavelength converter according to claim 9,
The diffuse reflector according to claim 10;
A light combining device that combines and emits light emitted from each of the wavelength conversion device and the diffuse reflection device;
A housing that houses the light source, the wavelength conversion device, the diffuse reflection device, and the photosynthesizing device,
At least a part of the position adjusting device provided in each of the wavelength conversion device and the diffuse reflection device is exposed to the outside of the casing. A light source device according to claim 11 or claim 12,
A light modulation device that modulates light emitted from the light source device;
And a projection optical device that projects light modulated by the light modulation device.

Images