JP6716923B2 - Position adjustment device, wavelength conversion device, diffuse reflection device, light source device, and projector - Google Patents

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.

BACKGROUND ART Conventionally, there is known a projector including an illumination device including 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, and 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 superposition optical system. Of 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 A prism, a first pickup optical system, a light emitting element (wavelength conversion element), an integrator optical system, a polarization conversion element, and a superposition optical system, which are located on the first optical axis, are arranged on a second optical axis orthogonal to the first optical axis. Located on the optical axis. The prism is arranged 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 that are solid-state light sources are arranged in an array, and the S-polarized blue light that is the laser light emitted from the array light source is converted into a parallel light flux by a collimator optical system. The beam diameter is adjusted by the afocal optical system. The polarization axis of the blue light is rotated by the blue light passing through the first retardation plate, which is a half-wave plate, and part of the blue light that is S-polarized light is converted into P-polarized light.

Of the S-polarized light and P-polarized light included in the blue light, S-polarized light is reflected by the polarization separation element of the prism, and P-polarized light is transmitted through the polarization separation element.
The reflected S-polarized light is made incident on the phosphor layer of the light emitting element as excitation light via the first pickup optical system, whereby yellow fluorescence is generated. This fluorescence is non-polarized light whose polarization directions are 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 blue light that has passed through the polarization separation element passes through the second retardation plate and is converted into circularly polarized light, and is converted by the diffuse reflection element (diffuse reflection device) through the second pickup optical system. It is diffusely reflected. This blue light is re-incident 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 has 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 fluxes, which are superposed together with the superimposing optical system on the light modulator which is the illuminated area. A polarization conversion element is arranged between these integrator optical system and superimposing optical system, and thereby the polarization directions are aligned.
Then, the respective color lights (image lights) modulated by the respective light modulators are combined by the combining optical system, and then enlarged and projected on the screen by the projection optical device.

JP, 2005-106130, A

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 the combined light is emitted to the integrator optical system. Is. For this reason, since it is necessary to match the luminous flux diameters of the fluorescent light and the blue light, the wavelength conversion device and the diffuse reflection device have 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 by 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 and the diffuse reflection layer provided in the wavelength conversion device and the diffuse reflection device is provided 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.

It is an object of the present invention to solve at least one of the above-mentioned problems, and to provide a position adjusting device, a wavelength converting device, a diffuse reflecting device, a light source device, and a projector that can readjust the position of a rotating wheel. With the goal.

A position adjusting device according to a first aspect of the present invention includes a connecting member that is connected to a driving device having a rotating wheel on which light is incident, and is fixed at a predetermined position, and the position of the connecting member is set to the incident direction of the light. And a position adjusting unit for adjusting the position of the connecting member after adjusting the position of the connecting member, the position adjusting unit being configured to adjust the position of the connecting member again.

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 as compared with the case where the position of the connecting member is adjusted by the adjusting unit and then fixed by an adhesive or the like.

In the said 1st aspect, the said position adjustment part has a through-hole which extends in the said incident direction of the light, and the fixed cylinder body which accommodates at least one part of the said connection member slidably in the said incident direction in the said through-hole. A rotary cylinder that is provided around the fixed cylinder and rotates along a side surface of the fixed cylinder; a pin that projects radially outward of the connecting member; and a pin formed on a side surface of the fixed cylinder. A first guide hole that extends in a direction along the incident direction, into which the pin is inserted, and guides the movement of the pin, and a side surface of the rotary cylinder that extends in a direction that is inclined with respect to the incident direction. A second guide hole into which the pin is inserted and which guides the movement of the pin, a first screw which surrounds a protruding portion provided at an end of the connecting member, and which is screwed into the fixed tubular body; It is preferable that a second screw that penetrates the tubular body and is screwed into the protruding portion is provided, and a tip end of the first screw is in contact with the connecting member.

In the first aspect, even when the rotary cylinder rotates, the pin projecting from the connecting member moves in the direction along the second guide hole of the pin by the first guide hole of the fixed cylinder. Movement is restricted. Therefore, 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 having the pin projecting moves along the incident direction, so that the driving device connected to the connecting member, and hence the rotating wheel of the driving device, can be moved along the incident direction. You can Thereby, the luminous flux diameter of the light incident on the rotating wheel can be adjusted.
Further, since the first screw surrounds the protruding portion provided at the end of the connecting member and is screwed into the fixed cylindrical body, and the tip of the first screw is in contact with the connecting member, the first screw is connected. The connecting member and the fixed cylinder can be firmly fixed while urging the member. Furthermore, since the second screw penetrates 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 urges the connecting member toward the rotating wheel and the second screw urges 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. Further, 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 portion, the connecting member and the fixing cylinder are fixed by an adhesive or the like. The reusability and the reworkability can be further improved as compared with the case of performing the above.

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

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

In the said 1st aspect, it is preferable to have a control part which controls the movement of the said lever.
According to the first aspect, since the regulation unit that regulates the movement of the lever is provided, the movement of the lever can be regulated after the position adjustment of the rotating wheel is executed. Therefore, the position of the rotating wheel can be maintained in a good condition.

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 side opposite to the incident direction. It is preferable.
According to the first aspect, since the first screw and the second screw are provided coaxially, 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 tubular body can be securely fixed.
Moreover, since the second screw has a shape that covers the first screw, it is possible to reduce the possibility that the first screw is mistakenly rotated. Further, it is possible to reduce the possibility that dust will adhere to the first screw.

In the said 1st aspect, the said position adjustment part has a through-hole which extends in the said incident direction of the light, and the fixed cylinder body which accommodates at least one part of the said connection member slidably in the said incident direction in the said through-hole. A pin projecting radially outward of the connecting member, a guide hole formed on a side surface of the fixed cylindrical body, extending in a direction along the incident direction, into which the pin is inserted, and guiding the movement of the pin. A screw having a side surface portion located on a side opposite to the incident direction of the fixed cylindrical body, a head portion abutting on the side surface portion, and a shaft portion screwed into a screwing portion of the connecting member; And a biasing member that is disposed between the member and the side surface portion and that biases the connecting member in the insertion direction of the screw.

According to the first aspect, even when the screw (shaft portion) is rotated, the movement of the screw in the rotation direction is restricted by the guide hole of the fixed cylindrical body. The pin does not move in the rotation direction. Therefore, since the connecting member having the pin projecting does not move in the direction, the amount of screwing of the connecting member into the screwing portion changes due to the rotation of the shaft portion of the screw.
In this way, since the connecting member having the pin projecting moves along the guide hole extending in the incident direction of the light incident on the rotating wheel, the driving device connected to the connecting member, and by extension, the driving device has The rotating wheel can be moved along the incident direction. Thereby, the luminous flux diameter of the light incident on the rotating wheel can be adjusted.
Further, since the urging member is arranged between the connecting member and the side surface portion and urges the connecting member in the insertion direction of the screw, the screw screwed to the connecting member and the screwing portion screwed with the screw. It is possible to suppress rattling caused by a gap between the biasing member.
Further, since the fixing cylinder and the connecting member are fixed by the screw, compared to the case where the connecting member and the fixing cylinder are fixed by an adhesive or the like after the position of the connecting member is adjusted by the position adjusting unit. , Reusability and reworkability can be further improved.

In the first aspect, it is preferable that the urging member is a coil spring, and the coil spring is arranged so as to surround the screw.
According to the first aspect, since the coil spring is arranged so as to surround the screw, the rattling caused by the gap between the screw and the threaded 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 a wavelength of the incident light. And
As the wavelength conversion layer, a phosphor layer containing a phosphor can be exemplified.
In the second aspect, the same effects as those of the position adjusting device according to the first aspect can be obtained. Further, since the light flux diameter of the light incident on the wavelength conversion layer can be adjusted, the light flux diameter of the light incident on the wavelength conversion layer (phosphor layer), converted in wavelength, and emitted 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 provided on the light incident side of the rotating wheel and diffusely reflecting the incident light. To do.
According to the third aspect, the same effects as those of the position adjusting device according to the first aspect can be obtained. In addition, the diameter of the light beam that is incident on the diffuse reflection layer and is diffusely reflected can be adjusted.

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 effect 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 combines light emitted from a light source, the wavelength conversion device, the diffuse reflection device, and light emitted from the wavelength conversion device and the diffusion reflection device. At least one of the position adjusting device provided in each of the wavelength conversion device and the diffuse reflection device, the device including a device and a housing that accommodates the light source, the wavelength conversion device, the diffuse reflection device, and the photosynthesis device. The part is exposed to the outside of the housing.
According to the fifth aspect, the light emitted from the light source enters the wavelength conversion device and the diffuse reflection device, and the luminous flux diameter of the light emitted from the wavelength conversion device and the diffusion reflection device can be adjusted. It is possible to emit light having a desired luminous flux diameter. Further, 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 luminous flux 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 modulator that modulates light emitted from the light source device; and a projection optical device that projects light modulated by the light modulator. It is characterized by being provided.
According to the sixth aspect, the same effects as those of the light source device according to the fourth aspect and the fifth aspect can be obtained. Further, since the light with the light flux diameter adjusted is emitted from the light source device, the brightness and saturation of the projected image emitted from the projector can be adjusted. Therefore, it is possible to suppress the occurrence of color unevenness in the projected image.

FIG. 1 is a perspective view showing the outer 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 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 conversion device concerning the above-mentioned embodiment from the light incidence side. The perspective view which looked at the wavelength conversion device concerning the above-mentioned embodiment from the direction opposite to the light incidence side. FIG. 3 is an exploded perspective view of the wavelength conversion device according to the above 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 conversion device which concerns on the said embodiment. The perspective view which looked at the diffuse reflection device concerning the above-mentioned embodiment from the light incidence side. The perspective view which looked at the diffuse reflection device concerning the above-mentioned embodiment from the direction opposite to the light incidence side. The exploded perspective view of the diffuse reflection device concerning the above-mentioned 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 device concerning the above-mentioned embodiment. The side view of the diffuse reflection device concerning the above-mentioned embodiment.

An embodiment of the present invention will be described below with reference to the drawings.
[External configuration of projector]
FIG. 1 is a perspective view showing an appearance of a projector 1 according to this embodiment.
The projector 1 according to the present embodiment modulates light emitted from an illumination device 41 described below to form an image according to image information, and projects the formed image in an enlarged manner onto a projection surface such as a screen. It is a type image display device. The projector 1 has a configuration in which the wavelength conversion device 6 and the diffuse reflection device 7 that configure the illumination device 41 have a configuration that suppresses a deviation (play) when fixed after position adjustment with respect to the respective optical axis orthogonal directions. It is one of the features.
As shown in FIG. 1, such a projector 1 has an exterior housing 2 that has an external appearance and that houses a device body 3 (see FIG. 2) described later. The exterior housing 2 is formed 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 that are each made of 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.

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

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

[Structure of image projection device]
The image projection device 4 forms an image according 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.
Of these, the illumination device 41 emits the illumination light WL that uniformly illuminates the light modulation device 44. The configuration of the lighting 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, 422, reflection mirrors 423, 424, 425, relay lenses 426, 427, and an optical component housing 428 that houses these.
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 parallelizing lens 43 (43B).
The dichroic mirror 422 reflects the green light LG of the green light LG and the red light LR reflected by the dichroic mirror 421, guides it to the parallelizing 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 lights are 43R, 43G, and 43B, respectively) and collimates the incident light.

The light modulator 44 (the light modulators for the respective color lights of red, green, and blue are designated as 44R, 44G, and 44B) modulates the incident color lights LR, LG, and LB, respectively, from the control device. An image is formed for each of the color lights LR, LG, and LB according to the input image signal. Each of these light modulators 44 is configured to include, for example, a liquid crystal panel that modulates incident light, and a pair of polarizing plates disposed on the incident side and the emitting side of the liquid crystal panel.
The color synthesizing device 45 synthesizes the images of the respective color lights LR, LG, LB which are incident from the respective light modulating devices 44R, 44G, 44B. In the present embodiment, the color synthesizing device 45 is composed of a cross dichroic prism, but it may be composed of a plurality of dichroic mirrors.
The projection optical device 46 enlarges and projects the image combined by the color combining device 45 onto the projection surface PS. As such a projection optical device 46, for example, a combined lens including 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 lighting 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 has a light source device 5 and a homogenizing 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 retardation element 53, a homogenizer optical device 54, a photosynthesis device 55, a first pickup optical device 56, a wavelength conversion device 6, and a second retardation element 57. In addition to the second pickup optical device 58 and the diffuse reflection device 7, a light source device casing 8 (see FIG. 4) described later is provided.
Among these, the light source unit 51, the afocal optical element 52, the first retardation element 53, the homogenizer optical device 54, the photosynthesis device 55, the second retardation element 57, the second pickup optical device 58, and the diffuse reflection device 7, 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 similarly set in the light source device casing 8 and arranged on the second illumination optical axis Ax2 orthogonal to the first illumination optical axis Ax1. The light combining device 55 is arranged 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 are the light source unit. 51, the afocal optical element 52, the first retardation element 53, the homogenizer optical device 54, and the photosynthesis device 55 are located on the opposite side.

In the description below, 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. Further, in the +X direction and the +Y direction which are orthogonal to the +Z direction and are also orthogonal to each other, the traveling of the illumination light emitted from the light source device 5 along the second illumination optical axis Ax2 which is orthogonal to the first illumination optical axis Ax1. The direction is +X direction. Further, the direction from the bottom surface portion 22 to the top surface portion 21 is defined as +Y direction. Although illustration is omitted, for convenience of explanation, the direction opposite to the +Z direction is defined as 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 photosynthetic member 513.
The first light source unit 511 includes a solid-state light source array 5111 in which a plurality of solid-state light sources SS, which are LDs (Laser Diodes), are arranged in a matrix, and a plurality of parallelizing lenses (not shown) corresponding to each solid-state light source SS. Have. Similarly, the second light source unit 512 also includes a solid-state light source array 5121 in which a plurality of solid-state light sources SS are arranged in a matrix, and a plurality of parallelizing lenses (not shown) corresponding to each solid-state light source SS. These solid-state light sources SS emit excitation light having a peak wavelength of 440 nm, but may emit excitation light having a peak wavelength of 446 nm. Further, solid-state light sources that emit excitation lights having peak wavelengths of 440 nm and 446 nm may be mixed in each of the light source units 511 and 512. The excitation light emitted from these solid-state light sources SS is collimated by the collimating lens and is incident on the photosynthetic member 513. In this embodiment, the excitation light emitted from each solid-state 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 emits the excitation light from the second light source unit 512 along the direction intersecting the first illumination optical axis Ax1. The generated excitation light is reflected along the first illumination optical axis Ax1 to combine the excitation lights. In the present embodiment, the light combining member 513 has a plurality of transmissive portions that transmit the excitation light from the first light source unit 511 and a plurality of reflective portions that alternately reflect the excitation light from the second light source unit 512. It is configured as an arrayed plate-shaped body. The excitation light that has passed through such a light combining member 513 is incident on the afocal optical element 52.
In FIG. 3, the second light source unit 512 is arranged on the +X direction side of the light combining member 513 in order to explain the function of the light combining member 513. However, in the present embodiment, the second light source unit 512 is arranged. 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.

[Structure of afocal optical element]
The afocal optical element 52 adjusts the luminous flux diameter of the excitation light incident from the light source unit 51. Specifically, the afocal optical element 52 collimates the excitation light incident from the lens 521 with a lens 521 that condenses the excitation light incident from the light source unit 51 as parallel light to reduce the luminous flux diameter. And a lens 522 for emitting light. The excitation light emitted from the light source unit 51 is condensed by the afocal optical element 52 and is incident on the first retardation element 53.

[Configuration of First Phase Difference Element]
The first retardation element 53 is a half-wave plate. By passing through the first retardation element 53, part of the S-polarized excitation light incident from the afocal optical element 52 is 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 retardation element 53 is incident on the homogenizer optical device 54.
In addition, in the present embodiment, the first retardation element 53 is configured to be rotatable around the optical axis of the first retardation element 53 (coincident with the first illumination optical axis Ax1). By rotating the first retardation element 53, the ratio of the S-polarized light and the P-polarized light of the excitation light that has passed through the first retardation element 53 can be adjusted, and thus the illumination emitted from the light source device 5 can be adjusted. You can adjust the white balance of the light.

[Configuration of homogenizer optical device]
The homogenizer optical device 54 is a homogenizing device that homogenizes 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 below, together with the first pickup optical device 56 described below. 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 excitation light incident on the first multi-lens 5411 is provided. 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. Then, the second multi-lens 542 cooperates with each second lens 5421 and the first pickup optical device 56 to divide the plurality of partial light beams divided by each first lens 5411 into a phosphor layer which is the illuminated region. 612 is superimposed. As a result, 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). (Orthogonal plane with respect to) is movable.

[Configuration of photosynthesis device]
The light synthesizing device 55 is a PBS (Polarizing Beam Splitter) having a prism 551 formed in a substantially right-angled isosceles triangular prism, 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 inclined substantially 45° with respect to each other, the surface 553 is substantially orthogonal to the second illumination optical axis Ax2, and the surface 554 is substantially 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 in 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 having a wavelength in the blue light region, but transmits S-polarized light and P-polarized light for light having a wavelength in the green light region and the red light region, respectively. , Having wavelength-selective polarization separation characteristics.
Of the excitation light incident from the homogenizer optical device 54, the P-polarized light is transmitted to the second retardation element 57 side along the first illumination optical axis Ax1 by the photosynthesis device 55, and the S-polarized light is The light is reflected toward the first pickup optical device 56 side along the two-illumination optical axis Ax2. That is, the photosynthesis device 55 emits P-polarized excitation light out of the excitation light incident from the homogenizer optical device 54 toward the second phase difference element 57, and outputs S-polarized excitation light in the first pickup optical device 56. Emit toward.
Further, as will be described in detail later, the photosynthesis device 55 synthesizes 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]
The S-polarized excitation light that has passed through the homogenizer optical device 54 and is reflected by the polarization separation layer is incident on the first pickup optical device 56. The first pickup optical device 56 collects (focuses) 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. , 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 wavelength-converts the 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.
Of these, the rotating device 62 corresponds to the driving device of the present invention, and is configured by a motor or the like for rotating 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 reflective layer 613 located on the surface of the substrate 611 on the incident side of excitation light.
The substrate 611 corresponds to the rotating wheel of the present invention, and is formed in a substantially circular shape when viewed from the excitation light incident side. 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 the incident excitation light and emits fluorescence that is unpolarized light (for example, fluorescence having a peak wavelength in the wavelength range of 500 to 700 nm). 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 reflective 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 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 photosynthesis 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. To be done. That is, the fluorescence generated by the wavelength conversion element 61 is emitted by the photosynthesis device 55 in the second illumination optical axis Ax2 direction (+X direction).

The position adjusting device 63 is configured such that at least the position of the phosphor layer 612 with respect to the first pickup optical device 56 is movable along the second illumination optical axis Ax2. 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. Therefore, the luminous flux diameter of the fluorescent light diffused and emitted from the wavelength conversion device 6 can be adjusted, and by extension, the luminous flux diameter of the fluorescent light traveling to the homogenizing device 9 side via the photosynthesis device 55 can be adjusted.
The detailed configuration of the position adjusting device 63 will be described later.

[Configurations of Second Phase Difference Element, Second Pickup Optical Device, and Diffusion Element]
The second retardation element 57 is a quarter-wave plate and converts the polarization state of the P-polarized excitation light (linearly polarized light) that is transmitted through the photosynthesis device 55 and is incident into circularly polarized light.
The second pickup optical device 58 is an optical device that collects (focuses) the excitation light that has passed through the second phase difference element 57 on the diffuse reflection device 7, and has three pickup lenses 581 to 583 in the present embodiment. .. However, the number of lenses forming the second pickup optical device 58 is not limited to three, like the first pickup optical device 56.
The diffuse reflection device 7 diffuse-reflects the incident excitation light (blue light) at a diffusion angle similar to that of the fluorescence emitted by being diffused from the wavelength conversion device 6. The diffuse reflection device 7 includes a reflection plate 71 that Lambert-reflects incident light, a rotation device 72 that rotates the reflection plate 71 to cool it, and a position adjustment device 73 that moves the reflection plate 71 and the rotation device 72. Have.
Of 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. By moving the reflection plate 71 in this way, it is possible to adjust the luminous flux diameter of the excitation light incident on the reflection plate 71. Therefore, the luminous flux diameter of the excitation light diffused by the diffuse reflection device 7, and thus the polarization The luminous flux diameter of the excitation light reflected by the separation layer and traveling toward the homogenizing device 9 can be adjusted. That is, the reflector 71 constitutes the diffuse reflection layer and the rotating wheel of the present invention.
The detailed configuration of the position adjusting 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 reflected by the diffuse reflection device 7, the circularly polarized light incident on the diffuse reflection device 7 becomes circularly polarized light in the opposite direction, and in the process of passing through the second phase difference element 57 again, the circularly polarized light in the opposite direction. The polarized excitation light is converted into S-polarized excitation light whose polarization direction is rotated by 90° with respect to P-polarized light. Then, the S-polarized excitation light is reflected by the polarization separation layer and is incident on the homogenizing device 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 photosynthesis device 55 in the same direction as the traveling direction of the fluorescence passing through the photosynthesis device 55.

The pickup lenses 581 to 583 forming the second pickup optical device 58 are configured to be movable along a plane orthogonal to the first illumination optical axis Ax1. By moving each of the lenses 581 to 583 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 further, reflected by the polarization separation layer, is uniform. It is possible to adjust the tilt angle of the excitation light with respect to the second illumination optical axis Ax2 traveling toward the conversion device 9. When the second multi-lens 542 of the homogenizer optical device 54 is moved, the optical path of the excitation light passing through the second multi-lens 542 is changed, so that the optical paths of the excitation light passing through the lenses 581 to 583 are changed. Is also changed. Therefore, the movement of the lenses 581 to 583 also has a function of complementing the change of the optical path of the blue light due to the movement of the second multi-lens 542.

In this way, of the excitation light that has entered the photosynthesis device 55 via the homogenizer optical device 54, the S-polarized excitation light is wavelength-converted into the fluorescence by the wavelength conversion device 6 and then passes through the photosynthesis device 55. And is incident on the homogenizing device 9. On the other hand, the P-polarized excitation light is diffused and reflected by being incident on the diffuse reflection device 7, transmitted through the second retardation element 57 twice, and reflected by the photosynthesis device 55 to be S-polarized blue. The light is incident on the homogenizing device 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 homogenizing device 9 as white illumination light.

[Configuration of homogenizer]
The homogenizing device 9 homogenizes 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 in turn, is illuminated by the light modulator 44 (44R, 44G, 44B). The illuminance distribution of the image forming area (modulation area) which is an 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 in a plane orthogonal to the optical axis, and the plurality of small lenses 911 divide the incident illumination light into a plurality of partial light fluxes. To do.
Like 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 in a plane orthogonal to the optical axis, and each small lens 921 corresponds to the corresponding small lens 911. It has a one-to-one relationship with. That is, the partial light flux emitted from the corresponding small lens 911 enters a certain small lens 921. These small lenses 921 superimpose the plurality of partial light beams divided by the respective 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 arranged 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.

[Optical path adjustment of luminous flux and luminous flux diameter adjustment in light source device]
In the light source device 5, the optical path of the fluorescent light and the optical path of the blue light emitted from the light source device 5 are the second illumination optical axis Ax2 which is the optical axis of the homogenizing device 9 due to the positional deviation and the tolerance of the optical components. There may be a deviation from. When the optical paths of the fluorescent light and the blue light are deviated, unevenness in illuminance occurs in the light modulation device 44 illuminated by the corresponding colored light, which causes unevenness in the projected image. Therefore, 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.
Also, when the light flux diameters of the fluorescent light and the blue light emitted from the light source device 5 are different, the uneven illuminance described above occurs, and thus the projected image also has uneven color.
Therefore, as described below, it is necessary to perform the optical path adjustment (optical axis adjustment) of the fluorescent light and the blue light as well as the respective light flux diameter adjustments.

First, each of the fluorescence optical path and the luminous flux diameter having a power higher than that of blue light is adjusted.
First, the second multilens 542 of the homogenizer optical device 54 is moved along a plane orthogonal to the first illumination optical axis Ax1 to adjust the incident angle of the excitation light with respect to the wavelength conversion device 6 (phosphor layer 612). As a result, the central axis of the fluorescence emitted from the wavelength conversion device 6 and the second illumination optical axis Ax2 are adjusted to coincide with each other.
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 falls within the area where the small lenses 911 are arranged 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. As a result, the diameter of the fluorescent light flux is adjusted.

Next, the optical path and luminous flux diameter of blue light are adjusted to match the optical path and luminous flux diameter of fluorescent light.
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 photosynthesis 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 photosynthesis device 55 toward the first lens array 91 is adjusted to match 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, the blue light is made incident on the arrangement region of the small lenses 911 in the first lens array 91, and the irradiation range of the fluorescence and the blue color. The position of the diffuse reflection device 7 is adjusted so that the light irradiation range matches. Thus, the luminous flux diameter of blue light is adjusted to match the luminous flux diameter of fluorescent light.

In this way, the optical path of the fluorescent light and the optical path of the blue light coincide with each other, and the luminous flux diameter of the fluorescent light coincides with the luminous flux diameter of the blue light. This suppresses the occurrence of color unevenness in the projected image.
As described above, the first retardation element 53 is configured to be rotatable about the first illumination optical axis Ax1 and is thereby included in the excitation light passing through the first retardation element 53. The ratio of the P-polarized light and the S-polarized light that is reflected can be adjusted. Therefore, it is possible to adjust the ratio between the light amount of the excitation light traveling from the photosynthesis device 55 to the diffuse reflection device 7 and the light amount of the excitation light traveling to the wavelength conversion device 6, in other words, the ratio of the blue light and the fluorescence. Therefore, the white balance of the illumination light WL emitted from the light source device 5 can be adjusted.

[Structure of light source device housing]
FIG. 4 is a perspective view of the light source device housing 8 as viewed from the +Z direction side.
As described above, the light source device housing 8 houses the above-mentioned components 52 to 58, 6, 7 at predetermined positions on the first illumination optical axis Ax1 and the second illumination optical axis Ax2 set inside. And is connected to the light source unit 51. As shown in FIG. 4, the light source device housing 8 is located on the −Y direction side and is located on the +Y direction side together with the first housing 8A to which the components 52 to 58, 6, and 7 are fixed. , And a configuration in which 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 has 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 four surface portions 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 projects toward the −X direction side when viewed from the +Y direction side. It is formed in a 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 cutout 8A1 to which the wavelength conversion device 6 is fixed and a second cutout 8A2 to which the diffuse reflection device 7 is fixed. Of these, the first cutout 8A1 is a substantially semicircular cutout formed in the fifth surface portion 85. The position adjusting device 63 of the wavelength converting device 6 is fitted into the first notch 8A1 and the second casing 8B is attached, so that the position adjusting device 63, and by extension, the wavelength converting device 6 is fixed.
The second cutout 8A2 is a substantially semicircular cutout formed in the second surface portion 82. The position adjusting device 73 of the diffuse reflection device 7 is fitted into the second cutout 8A2, and the second housing 8B is attached, so that the position adjusting device 73 and, by extension, the diffuse reflection device 7 are fixed.

That is, the light source device housing 8 exposes a part of the position adjusting device 63 of the wavelength conversion device 6 and a part of the position adjusting device 73 of the diffuse reflection device 7 and exposes the wavelength conversion device 6 and the diffuse reflection device 7. The device 7 is housed and fixed.
In the present embodiment, although not shown, a cooling device for cooling the wavelength conversion device 6 and a cover through which cooling gas from the cooling device circulates are provided so as to cover a part of the wavelength conversion device 6. Therefore, 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 viewed from the +X direction side, FIG. 7 is a perspective view of the wavelength conversion device 6 viewed from the −X direction side, and FIG. 8 is a view of the wavelength conversion device 6. It is an exploded perspective view.
As shown in FIG. 8, the wavelength conversion element 61 includes streamlined fins 614 fixed to the surface of the substrate 611 on the −X direction side, in addition to the above configuration. By providing the fins 614, the cooling gas circulates in the substrate 611 and cools the substrate 611 and thus the phosphor layer 612.
A fixed plate 621 is provided on the −X direction side surface of the rotation device 62. The fixing plate 621 is a portion to which a position adjusting device 63 (coupling member 631) described later is fixed, and an opening 6211 is formed at substantially the center of the fixing plate 621. The rotating device 62 is fitted into the opening 6211.
Further, screw holes 6212 are formed at both ends of the fixed plate 621 that sandwich the opening 6211. The screw S1 is inserted into the screw hole 6212 via 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 rotating wheel of the present invention along the X direction, and adjusts the light flux diameter of the light incident on the wavelength conversion element 61. As shown in FIGS. 6 to 8, the position adjusting device 63 includes a connecting member 631, a fixed cylinder 632, a rotary cylinder 633, a pin 634, a grip 635, a fixing screw 636, a first screw 637, and a second screw. 638 and screw S1.
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 the position adjusting unit of the present invention.

[Composition of connecting members]
Of these, the connecting member 631 is a member 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-shaped portion 6311, an extending portion 6312, and a protruding portion 6313.
The plate-shaped portion 6311 is formed in a substantially circular shape, and is arranged so as to face the fixed plate 621. An extending portion 6312 extending in the −X direction is connected to a substantially central portion of the −X direction side surface of the plate-shaped portion 6311. Further, through holes 63111 are formed on the +Z direction side and the −Z direction side of the plate-shaped portion 6311, respectively. 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 portion 6312 is a cylindrical portion that extends in the −X direction from the substantially central portion of the plate-shaped portion 6311. The extending portion 6312 is arranged in a through hole 63211 of a fixed cylindrical body 632, which will be described later, and is movably supported in the through hole 6321 along the X direction. Further, three mounting portions 63121 are formed on the radially outer side of the extending portion 6312. These three attachment portions 63121 are formed in each of the 4 o'clock direction, the 8 o'clock direction, and the 12 o'clock direction when the columnar extending portion 6312 is viewed along the −X direction. Pins 634, which will be described later, are provided in a protruding manner on these attachment portions 63121.
The protruding portion 6313 is a portion protruding from the surface 63122 (end portion) on the −X direction side of the extending portion 6312 in that direction. A screwing portion 63131 that penetrates the protruding portion 6313 in the +X direction and is screwed with a second screw 638 to be described later is formed in a substantially central portion of the protruding portion 6313.

[Structure of fixed cylinder]
The fixed cylindrical body 632 is a member that slidably accommodates the extending portion 6312 that is at least a part of the connecting member 631. The fixed tubular body 632 includes a tubular portion 6321, an enlarged diameter portion 6322, and a screwing portion 6323, as shown in FIGS. 6 to 8. The tubular portion 6321 is formed with a through hole 63211 that penetrates the tubular portion 6321 in a direction along the X direction. The extending portion 6312 is inserted into the through hole 63211.
Further, three first guide holes 63212 are formed on the side surface of the fixed cylindrical body 632 (cylindrical 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 (direction along the −X direction), and the pin 634 is inserted into the first guide holes 63212. .. The 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 6321. The threaded portion 6323 is threadedly engaged with a first screw 637 described later.

The enlarged diameter portion 6322 is fixed to the position on the −X direction side of the tubular portion 6321 and is arranged outside the light source device housing 8. The enlarged diameter portion 6322 is formed in a plate shape that extends radially outward of the tubular portion 6321. The expanded diameter portion 6322 includes a first opening 63221, a second opening 63222, and a third opening 63223. Of these, the first opening 63221 is an opening formed in a shape along the rotation direction of the rotary cylinder 633 described later. In other words, the first opening 63221 is formed in a substantially arc shape. A grip portion 635, which will be described later, is inserted into the first opening 63221.
Further, the second opening 63222 is an opening located in the −Y direction of the first opening 63221 and formed in substantially the same shape as the first opening 63221. A fixing screw 636 is inserted into 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 6321 1 formed at a position facing the through hole 6321 1 of the tubular portion 6321. The first screw 637, which will be described later, is screwed into the screwing portion 6323 provided in the through hole 6321 through the third opening 63223.

[Structure of rotating cylinder]
The rotary 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 rotary cylinder 633 includes a cylindrical main body portion 6331 and an extending portion 6332 extending from the main body portion 6331. Of these, the main body portion 6331 is a tubular body extending along the X direction and includes three second guide holes 63311.
These three second guide holes 63311 guide the movement of the pin 634. These second guide holes 63311 have a shape that extends obliquely with respect to the incident direction of light incident on the wavelength conversion element 61 (direction along the −X direction). More specifically, the −Z direction side end of the second guide hole 63311 is inclined so as to be located on the +X direction side with respect to the +Z direction side end of the second guide hole 63311. The pin 634 is inserted into the second guide hole 63311. The second guide holes 63311 are formed at positions corresponding to the mounting portions 63121 of the extending 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 screw hole 63322.
The through hole 63321 is a through hole provided at a position corresponding to the first opening 63221 of the expanded diameter portion 6322. The grip portion 635 is fitted into the through hole 63321 via 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, whereby the rotary cylinder 633 rotates. That is, the grip portion 635 and the extension portion 6332 form the lever of the present invention.
The screwing hole 63322 is a screwing hole provided at a position corresponding to the second opening 63222 of the expanded 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 into the screwing hole 63322. The head 6361 of the fixing screw 636 contacts the surface of the second opening 63222 on the −X direction side by pressing in the direction of tightening the fixing screw 636, and presses the surface. As a result, the rotary cylinder 633 is fixed at the position moved by the operation of the grip portion 635. That is, the fixing screw 636 and the expanded diameter portion 6322 function as the restriction portion of the present invention that restricts the movement of the grip portion 635 and the extension portion 6332 that function as the lever of the present invention.

[Pin configuration]
FIG. 9 is a plan view of the wavelength conversion device 6 viewed from the +Y direction side.
As shown in FIGS. 6 to 9, the pin 634 is a member that is provided to project from the extending portion 6312, is guided by the first guide hole 63212 and the second guide hole 63311, and moves in the direction along the X direction. is there. That is, since the pin 634 is provided so as to project from the extending portion 6312, the extending portion 6312 (connecting member 631) moves in the same direction as the moving direction of the pin.
Such a pin 634 has a bearing portion 6341, a contact portion 6342, and a screw 6343. The 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 with 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 that contacts the edge portions of the first guide hole 63212 and the second guide hole 63311. The abutting portion 6342 is formed in a tubular shape that surrounds the periphery of the threaded portion of the bearing portion 6341.
The screw 6343 is screwed to the screwing portion formed on the bearing portion 6341 and the mounting portion 63121 via the contact portion 6342. As a result, the pin 634 is formed, and the pin 634 is guided by the first guide hole 63212 and the second guide hole 63311, so that the connecting member 631, and thus the wavelength conversion element 61 moves in the X direction.

[Structure of first screw]
FIG. 10 is a cross-sectional view of the wavelength conversion device 6 taken along the line A1-A1 of FIG. 9 as seen 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 cylindrical body 632. The first screw 637 surrounds the protruding portion 6313 of the connecting member 631 and is screwed into the fixed cylindrical body 632.
As shown in FIGS. 8 and 10, such a first screw 637 includes a main body portion 6371, a screwing portion 6372, an abutting portion 6373, and a cutout 6374. Of these, the main body portion 6371 is formed in a tubular shape. The threaded portion 6372 is formed on the outer peripheral edge of the main body portion 6371. The screwing portion 6372 is a portion that is screwed into the screwing 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 a portion formed at the end of the main body portion 6371 on the −X direction side, and a predetermined jig is attached to the notch 6374. With such a configuration, when the predetermined jig is attached to the notch 6374 and rotated, the first screw 637 moves in the +X direction side and is screwed into the screwing portion 6323 of the fixed tubular body 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 cylindrical body 632 while urging the connecting member 631 toward the +X direction side.

[Second screw configuration]
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 penetrates the fixed cylindrical body 632 (the expanded diameter portion 6322) and is screwed into the screwing portion 63131 of the projecting portion 6313.
Such a second screw 638 includes a shaft portion 6381 and a head portion 6382. Of these, the shaft portion 6381 is a screwing portion that extends 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 portion 6382 has a shape that extends radially outward and extends in the +X direction side. The edge portion 6383 of the head portion 6382 is in contact with the end portion of the tubular portion 6321 of the fixed tubular body 632 on the −X direction side.
With such a configuration, the second screw 638 biases the connecting member 631 in the −X direction. Further, 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.

[Adjusting the position of the 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 light beam diameter of the 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 that constitutes the lever of the position adjusting device 63 in the +K1 direction. In this way, when the grip portion 635 is moved in the +K1 direction, the rotary cylinder 633 rotates in the +K1 direction.
Here, even when the rotary cylinder 633 rotates 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 63311, 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 is provided is moved in the +X direction, so that the fixing plate 621 to which the connecting member 631 is fixed and thus the wavelength conversion element 61 is moved in the +X direction. Therefore, by moving the grip portion 635 in the +K1 direction, the wavelength conversion element 61 comes close to the first pickup optical device 56, and the luminous flux diameter of the light incident on the wavelength conversion element 61 increases.

On the other hand, when the user moves the grip portion 635 that forms the lever of the position adjusting device 63 in the direction opposite to the +K1 direction (hereinafter, referred to as the −K1 direction), the rotary cylinder 633 rotates in the −K1 direction.
Here, even when the rotating tubular body 633 rotates in the −K1 direction, as described above, the pin 634 can be moved in the −K1 direction by the first guide hole 63212 of the fixed tubular body 632. Since it is restricted, the pin 634 does not move in the -K1 direction. Therefore, the pin 634 is pressed in the −X direction side by the second guide hole 63311, and as shown in FIG. 12, along the first guide hole 63212 extending in 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 is provided is moved in the −X direction, so that the fixing plate 621 to which the connecting member 631 is fixed and thus the wavelength conversion element 61 is moved in the −X direction. Therefore, by moving the grip portion 635 in the −K1 direction, the wavelength conversion element 61 is separated from the first pickup optical device 56, and the luminous flux 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 luminous flux diameter of the light incident on the wavelength conversion element 61 is adjusted. Then, after the adjustment is performed, the fixing screw 636 is fastened to complete the adjustment of the luminous flux diameter.

[Configuration of diffuse reflector]
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. 15 is an exploded perspective view of the diffuse reflection device 7.
The reflection plate 71 is composed of a substrate provided with a diffuse reflection layer on the light incident side. As shown in FIGS. 13 to 15, in addition to the above structure, the propeller fixed to the +Z direction side surface of the reflection plate 71. -Shaped fin 711. By providing the fins 711, the cooling gas circulates in the reflection plate 71 and cools the reflection plate 71 and thus the diffuse reflection layer.
A fixed plate 721 is provided on the +Z direction side surface of the rotating device 72. The fixing plate 721 is a portion to which a position adjusting device 73 (coupling member 731) described later is fixed, and an opening portion 7211 is formed substantially in the center of the fixing plate 721. The rotating device 72 is fitted in the opening 7211.
Further, three screw holes 7212 are formed near the outer edge of the opening 7211 of the fixing plate 721. A screw S2 is inserted into the screw hole 7212 via a connecting member 731, which will be 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 luminous flux 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 cylinder 732, a pin 733, a side surface portion 734, an adjusting screw 735, a biasing member SP, a frame body 736, a fixing screw 737, and A regulation screw 738 is provided.
The fixed cylinder 732, the pin 733, the side surface portion 734, the adjusting screw 735, the biasing member SP, the frame body 736, the fixing screw 737, and the regulating screw 738 function as the position adjusting portion of the present invention.

[Composition of connecting members]
Of these, the connection member 731 is a member connected to the fixed plate 721 of the rotation device 72 that rotationally drives the reflection 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 a mounting portion 7315.
The main body portion 7311 is formed in a substantially tubular shape, and is arranged so as to face the fixed plate 721. A central plate portion 7312 that closes the tubular main body portion 7311 is provided inside the tubular main body portion 7311. A projecting portion 7313 that projects in the +Z direction is formed at substantially the center of the central plate portion 7312.
A screwing portion 73131 to which an adjusting screw 735 described later is screwed is formed at approximately the center of the protruding portion 7313. Further, three through holes 7314 are formed around the protruding portion 7313. The three through holes 7314 are provided at positions corresponding to the three screw holes 7212 of the fixing plate 721, and the screws S2 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 fixed plate 721.

Further, the main body portion 7311 is arranged inside a fixed cylindrical body 732 described later, and is supported movably in the fixed cylindrical body 732 along the Z direction. Further, three mounting portions 7315 are formed on the outside in the radial direction of the main body portion 7311. These three attachment portions 7315 are formed in each of the 2 o'clock direction, the 6 o'clock direction, and the 10 o'clock direction when the tubular main body portion 7311 is viewed along the +Z direction. A pin 733, which will be described later, is provided in a protruding manner on these mounting portions 7315.

[Structure of fixed cylinder]
The fixed tubular body 732 is a member that slidably accommodates the connecting member 731. As shown in FIGS. 13 to 15, the fixed tubular body 732 includes a tubular portion 7321 and a frame portion 7322. The connecting member 731 is inserted into the tubular portion 7321.
Further, three third guide holes 73211 are formed on the side surface of the fixed tubular body 732 (cylindrical portion 7321). These three third guide holes 73211 guide the movement of the pin 733. These third guide holes 73211 have a shape extending in the incident direction of light incident on the reflection plate 71 (direction along the +Z direction), and the pin 733 is inserted into the third guide hole 73211. The third guide holes 73211 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 of the tubular portion 7321 on the +Z direction side to the outside in the radial direction of the tubular portion 7321. The frame portion 7322 is arranged outside the light source device housing 8. In such a frame portion 7322, three screw holes 73221 and two screw holes 73222 are formed. Of these, three screw holes 73221 are respectively provided at positions of 4 o'clock, 8 o'clock, and 12 o'clock when the frame portion 7322 is viewed from the +Z direction side, and the screw hole 73221 has a frame body described later. The fixing screw 737 is screwed through the through hole 7361 of the 736.
Further, the two screw holes 73222 are provided at the positions of 3 o'clock and 9 o'clock 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 viewed from the +Y direction side.
As shown in FIGS. 13 to 16, the pin 733 is a member that is provided so as to project from the connecting member 731, is guided by the third guide hole 73211, and moves in the direction along the Z direction. That is, the connecting member 731 moves in the same direction as the moving direction of the pin 733 in accordance with the movement of the pin 733.
Such a pin 733 has a bearing portion 7331, a contact portion 7332, and a screw 7333. Note that the bearing portion 7331, the contact portion 7332, and the screw 7333 have the same shapes as the bearing portion 6341, the contact portion 6342, and the screw 6343, and therefore description thereof will be omitted. With such a configuration, the pin 733 is guided by the third guide hole 73211, so that the connecting member 731, and thus the reflecting plate 71, moves in the Z direction.

[Structure of side part]
FIG. 17 is a cross-sectional view of the diffuse reflection device 7 taken along line B1-B1 of FIG. 16 as seen from the −X direction.
As shown in FIGS. 13 to 15 and 17, the side surface portion 734 is a circular plate-shaped member and is a portion located on the +Z direction side of the fixed cylindrical body 732. Specifically, the side surface portion 734 is supported by the surface of the frame portion 7322 of the fixed cylindrical body 732 on the +Z direction side.
The side surface portion 734 has a through hole 7341 at a substantially central portion. An adjusting screw 735, which will be described later, is inserted into the through hole 7341 and screwed into the screwing portion 73131 of the projecting portion 7313 of the connecting member 731.
A nut 735A and a biasing member SP attached to a shaft portion 7352 of the adjusting screw 735, which will be described later, come into contact with the −Z direction side surface 7342 of the side surface portion 734.

[Adjustment screw configuration]
The adjusting screw 735 is inserted through the through hole 7341 of the side surface portion 734 and screwed into the screwing portion 73131 of the projecting portion 7313 of the connecting member 731. That is, the adjusting screw 735 has a function of moving the connecting member 731 along the Z direction by the rotation of the adjusting screw 735. The adjusting screw 735 includes a head portion 7351, a shaft portion 7352, and a nut 735A, as shown in FIGS.
Of these, the head portion 7351 is a portion that comes into contact with the surface of the side surface portion 734 on the +Z direction side. As shown in FIG. 15, a cutout 73511 is formed in the head portion 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 a portion where a screw groove is formed, and is screwed into the screwing portion 73131 of the projecting portion 7313 of the connecting member 731. A nut 735A is fitted in 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 each comes into contact with the surface of the side surface portion 734. ing. With such a configuration, rattling of the adjusting screw 735 is suppressed.

[Structure of biasing member]
The urging member SP is a member that is arranged between the connecting member 731 and the side surface portion 734 and urges the connecting member 731 in the insertion direction (−Z direction) of the adjusting screw 735. The biasing member SP is configured by, for example, a coil spring or the like, and as shown in FIG. 17, contacts the +Z direction side surface of the central plate portion 7312 and the −Z direction side surface 7342 of the side surface portion 734, The side surface portion 734 is biased in the −Z direction.
Such biasing member SP is arranged on the central plate portion 7312 so as to surround the periphery of the protruding portion 7313, and the shaft portion 7352 of the adjusting screw 735 is inserted in the center of the biasing member SP. In other words, the biasing member SP is arranged so as to surround the shaft portion 7352 of the adjusting screw 735. According to this, rattling of the adjusting screw 735 caused by a slight gap generated between the screw groove formed in the shaft portion 7352 of the adjusting 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 body 736 has openings 7360, three through holes 7361, and two recesses 7362, as shown in FIGS.
The opening 7360 is an opening provided substantially in the center of the frame body 736, and the adjustment screw 735 can be adjusted through 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 screwed into a screw hole 73221 formed in the frame portion 7322 of the fixed cylindrical body 732 so as to sandwich the side surface portion 734. As a result, the frame body 736 is fixed to the fixed cylindrical body 732.

The two recesses 7362 are provided at the end portion on the +X direction side and the end portion on the −X direction side of the frame body 736. These recesses 7362 are recesses having a size 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 fixing cylinder body 732, the fixing screw 737 does not contact the frame body 736. ..

[Regulation screw configuration]
FIG. 18 is a plan view of the diffuse reflection device 7 viewed from the +Z direction side.
The restriction screw 738 is a member that presses the side surface portion 734 against the frame portion 7322 of the fixed cylindrical body 732 to restrict the rotation of the side surface portion 734. A washer 7381 is inserted into the shaft portion of the regulation screw 738. The restriction screw 738 is screwed into the screw hole 73222 of the frame portion 7322 as shown in FIG. At this time, the washer 7381 inserted into the regulation screw 738 contacts the vicinity of the edge of the side surface portion 734. That is, the +X direction side edge and the −X direction side edge of the side surface portion 734 are pressed against the frame portion 7322 by the washer 7381, and rotation thereof is restricted. As a result, 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 viewed from the −X direction side.
The luminous flux diameter of the light incident on the reflection plate 71 of the diffuse reflection device 7 is adjusted by operating the position adjusting device 73. First, the user moves the adjusting screw 735 of the position adjusting device 73 in the +K2 direction using a predetermined jig. Thus, when the adjusting screw 735 is rotated in the +K2 direction, the shaft portion 7352 of the adjusting screw 735 is rotated in the +K2 direction.
Here, even when the shaft portion 7352 rotates in the +K2 direction, the movement of the pin 733 in the +K2 direction is restricted by the third guide hole 73211 of the fixed cylindrical body 732, and thus the pin 733. Does not move in the +K2 direction. For this reason, since the connecting member 731 provided with the pin 733 protruding does not move in the +K2 direction, the rotation amount of the shaft portion 7352 of the adjusting screw 735 increases the screwing amount of the projecting portion 7313 with the screwing portion 73131. To do.
As a result, the connecting member 731 provided with the pin 733 moves along the third guide hole 73211 in the +T2 direction, that is, the +Z direction shown in FIG. 19, so that the fixing plate 721 to which the connecting member 731 is fixed is fixed. Then, the reflection plate 71 moves in the +Z direction. Therefore, by rotating the adjusting screw 735 in the +K2 direction, the reflecting plate 71 is separated from the second pickup optical device 58, and the luminous flux diameter of the light incident on the reflecting plate 71 is reduced.

On the other hand, when the user rotates the adjusting screw 735 of the position adjusting device 73 in the direction opposite to the +K2 direction (hereinafter, referred to as −K2 direction), the shaft portion 7352 of the adjusting screw 735 rotates in the −K2 direction.
Here, even when the shaft portion 7352 rotates in the −K2 direction, the movement of the pin 733 in the −K1 direction is restricted by the third guide hole 73211 of the fixed cylindrical body 732. The pin 733 does not move in the −K2 direction. Therefore, since the connecting member 731 provided with the pin 733 protruding does not move in the −K2 direction, the screwing amount of the protruding portion 7313 with the screwing portion 73131 is increased by the rotation of the shaft portion 7352 of the adjusting screw 735. Decrease.
As a result, the connecting member 731 on which the pin 733 is provided is moved along the third guide hole 73211 in the direction opposite to the +T2 direction shown in FIG. 19 (hereinafter referred to as the −T2 direction), that is, the −Z direction. Therefore, the fixing plate 721 to which the connecting member 731 is fixed, and thus the reflecting plate 71, moves in the −Z direction. Therefore, by rotating the adjusting screw 735 in the −K2 direction, the reflection plate 71 comes close to the second pickup optical device 58, and the luminous flux diameter of the light incident on the reflection plate 71 increases. Then, the adjustment of the luminous flux diameter is completed.

[Effect of Embodiment]
The projector 1 according to the present embodiment described above has the following effects.
The 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 reflection plate 71 enable the positions of the connecting members 631 and 731 to be readjusted. Since it is configured, it is possible to improve reusability and reworkability as compared with a 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, for example.

Even when the rotary cylinder 633 rotates, the pin 634 projecting from the connecting member 631 is moved by the first guide hole 63212 of the fixed cylinder 632 in the direction along the second guide hole 63311 of the pin 634. Movement is regulated. Therefore, the pin 634 moves along the extending direction of the first guide hole 63212 extending along the incident direction (direction along the X direction) of the light incident on the wavelength conversion element 61. As a result, the connecting member 631 with the pin 634 protruding therefrom moves in the X direction, so that 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 luminous flux diameter of the light incident on the wavelength conversion element 61 can be adjusted.

Further, the first screw 637 surrounds the projecting portion 6313 provided at the end portion of the connecting member 631, and is screwed into the screwing portion 6323 of the fixed tubular body 632, and the tip of the first screw 637 (abutting portion 6373). Is in contact with the connecting member 631, it is possible to firmly fix the connecting member 631 and the fixed cylindrical body 632 while urging the connecting member 631 by the first screw 637. Furthermore, since the second screw 638 penetrates the fixed cylindrical body 632 and is screwed into the screwing portion 63131 of the protruding portion 6313, the connecting member 631 can be biased toward the fixed cylindrical body 632.
According to this, the first screw 637 urges the coupling member 631 toward the wavelength conversion element 61 side, and the second screw 638 urges the coupling member 631 toward the fixed cylinder body 632 side. The body 632 can be firmly fixed. Therefore, rattling that occurs between the fixed cylindrical body 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, after the position of the connecting member 631 is adjusted by the position adjusting device 63, the connecting member 631 and the fixed cylinder are fixed. The reusability and reworkability can be further improved as compared with the case where the body 632 is fixed with an adhesive or the like.

Since the rotary cylinder 633 has the extending portion 6332 and the gripping portion 635 that function as a lever that rotates the rotary cylinder 633, the user can easily operate the gripping portion 635 to easily rotate the rotary cylinder 633. Can be rotated. Therefore, it is possible to easily adjust the positions of the connecting member 631, and by extension, the wavelength conversion element 61 and the rotating device 62 to which the connecting member 631 is connected.

Since the grip portion 635, which is a part of the lever, is inserted into the first opening 63221 formed in the expanded diameter portion 6322 that expands radially outward of the fixed cylinder 632, the rotation range of the lever (grasping 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 restriction portion that restricts the movement of the grip portion 635 that functions as a lever, the movement of the lever (grip 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 coaxially, as compared with the case where the first screw 637 and the second screw 638 are arranged at distant positions, the connecting member 631 and the fixed cylindrical body 632 are provided. Can be securely fixed.
Further, since the second screw 638 has a shape that covers the first screw 637, it is possible to reduce the possibility that the first screw 637 is erroneously rotated. Further, it is possible to reduce the possibility that dust will adhere to the first screw 637.

Even when the adjusting screw 735 (shaft portion 7352) of the position adjusting device 73 rotates, the pin 733 moves in the rotating direction of the adjusting screw 735 by the third guide hole 73211 of the fixed cylindrical body 732. Is restricted, the pin 733 does not move in the rotation direction. For this reason, the connecting member 731 provided with the pin 733 protruding does not move in that direction either, so that the rotation of the shaft portion 7352 of the adjusting screw 735 causes the screwing portion 73131 formed on the protruding portion 7313 of the connecting member 731. The amount of screwing in is changed.
In this way, since the connecting member 731 having the pin 733 projecting moves along the third guide hole 73211 extending in the incident direction of the light incident on the reflection plate 71, the rotating device connected to the connecting member 731. The 72 and the reflector 71 can be moved along the incident direction. Thereby, the luminous flux diameter of the light incident on the reflection 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 to the connecting member 731, The biasing member SP can suppress rattling caused by a gap between the adjusting screw 735 and the screwing portion 73131 with which the adjusting screw 735 is screwed.
Further, since the fixing cylinder 732 and the connecting member 731 are fixed by the adjusting screw 735, after the position of the connecting member 731 is adjusted by the position adjusting device 73, the connecting member 731 and the fixing cylindrical body 732 are adhesive or the like. The reusability and reworkability can be further improved as compared with the case of fixing by.
In addition, since the biasing member SP is composed of a coil spring and the biasing member SP is arranged so as to surround the adjusting screw 735, it is caused by the gap between the adjusting screw 735 and the screwing portion 73131. Tapping can be reliably suppressed by the biasing member SP.

Since the light flux diameter of the light incident on the wavelength conversion element 61 can be adjusted, the light flux diameter of the fluorescence incident on the phosphor layer 612 of the wavelength conversion element 61, converted in wavelength, and emitted can be adjusted.
In addition, the light flux diameter of the light that is incident on the diffuse reflection layer of the reflector 71 and is diffusely reflected can be adjusted.

The light emitted from the light source unit 51 is incident on the wavelength conversion device 6 and the diffuse reflection device 7, and the luminous flux 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 having a luminous flux 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 to the outside of the light source device housing 8, the wavelength conversion element 61 and the reflection plate 71 are provided. The position can be adjusted easily. Therefore, the brightness of the light emitted from the light source device 5 and the luminous flux diameter of the light can be easily adjusted, and in turn, the white balance of the light emitted from the light source device 5 can be adjusted.
In addition, since the light source device 5 emits the light whose luminous flux diameter and white balance are adjusted, the brightness and the saturation of the projection image emitted from the projector 1 can be adjusted. Therefore, it is possible to suppress the occurrence of color unevenness in the projected image.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved.
In the above embodiment, the rotary cylinder 633 is provided with the extending portion 6332 that functions as a lever. However, the invention is not limited to this, and for example, the rotary cylinder 633 may not include the extending portion 632. In this case, the user holds the rotary cylinder 633 and rotates the rotary cylinder 633 to adjust the position of the connecting member 631, and thus the wavelength conversion element 61.

In the above-described embodiment, the fixed tubular body 632 includes the expanded diameter portion 6322 and the first opening 63221 formed in the expanded diameter portion 6322. However, without being limited to this, for example, the fixed cylindrical body 632 may not include the expanded diameter portion 6322 and the first opening 63221 formed in the expanded diameter portion 6322. In this case, the user can move the gripping portion 635 to outside the predetermined range regulated by the first opening 63221, and further increase the moving distance of the connecting member 631, and thus the wavelength conversion element 61.

In the above-described embodiment, the fixing screw 636 is provided as a restriction portion that restricts the movement of the extension portion 6332 that functions as a lever and the grip portion 635. However, the present invention is not limited to this, and for example, a restriction part different from the fixing screw 636 may be provided as the restriction part, or the restriction part 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 actions of the first screw 637 and the second screw 638.

In the above embodiment, the first screw 637 and the second screw 638 are coaxially provided. However, without being limited to this, for example, the first screw 637 and the second screw 638 may not be provided coaxially. Even in this case, the same effect as that of the above-described embodiment can be obtained.
Further, the second screw 638 has a shape that covers the first screw 637. However, without being limited to this, for example, the second screw 638 may not have a shape that covers the first screw 637. Even in this case, the first screw 637 and the second screw 638 interact with each other, so that the same effect as that of the above-described embodiment can be obtained.

In the above-described embodiment, the position adjusting 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, not limited to this, for example, the first screw 637 may be attached to the above position after the wavelength conversion element 61 is moved to a desired position by the operation of the grip portion 635. In this case, the first screw 637 can be reliably brought into contact with the surface 63122, so that the connecting member 631 and the fixed cylinder 632 can be further firmly fixed. Therefore, rattling can be suppressed more reliably.

In the above-described embodiment, the biasing member SP is configured by the coil spring. However, without being limited to this, for example, the biasing member SP may not be configured by a coil spring. Further, when the biasing member SP is not composed of the coil spring, the biasing member SP does not have to be arranged around the adjusting screw 735.

In the above embodiment, the position adjusting device 73 of the diffuse reflection device 7 is provided with the regulation screw 738. However, without being limited to this, for example, the position adjusting device 73 may not include the regulation screw 738. In this case, for example, instead of the side surface portion 734, an adjusting screw having a head portion 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-described embodiment can be obtained.

In each of the above-described embodiments, the light modulator 44 (44R, 44G, 44B) is used. However, the present invention is not limited to this, and for example, instead of the transmissive optical modulator 44 (44R, 44G, 44B), a reflective optical modulator may be used. In this case, the color separating device 32 may not be provided, and the color combining device 45 may execute the color separation and the color combination.

In the above-described embodiment, the projector 1 includes three light modulation devices 44 (44R, 44G, 44B), but the invention is not limited to this. That is, two or less light modulation devices or four or more light modulation devices are used. The present invention can be applied to other projectors.
Further, as long as it is an optical modulator capable of modulating an incident light beam to 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, other than liquid crystal is used. A light modulator 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 (rotating body wheel), 612... Phosphor layer (wavelength converting layer), 613... Reflecting layer, 62... Rotating device (driving device), 63... Position adjusting device, 631... Connecting member, 6311... Plate shape Part, 63111... through hole, 6312... extension part, 63121... mounting part, 63122... surface, 6313... projecting part, 63131... screwing part, 632... fixed tubular body (position adjusting part), 6321... tubular part, 63211... Through hole, 63212... First guide hole, 6322... Expanded portion, 63221... First opening, 63222... Second opening, 63223... Third opening, 6323... Threaded portion, 633... Rotating cylinder (Position adjusting part), 6331... Main body part, 63311... Second guide hole, 6332... Extension part (lever), 63321... Through hole, 63322... Screw hole, 634... Pin (position adjusting part), 6341... Bearing Portion, 6342... contact portion, 635... gripping portion (position adjusting portion/lever), 636... fixing screw (regulating portion), 6361... head portion, 637... first screw, 6371... main body portion, 6372... screwing portion , 6373... Abutting part, 6374... Notch, 638... Second screw, 6381... Shaft part, 6382... Head part, 6383... Edge part, 7... Diffuse reflection device, 71... Reflector plate (rotating wheel), 72... Rotation Device (driving device), 721... Fixing plate, 7211... Opening part, 7212... Hole, 73... Position adjusting device, 731... Connecting member, 7311... Main body part, 7312... Central plate part, 7313... Projection part, 73131... Screw Joint part, 7314... Through hole, 7315... Attachment part, 732... Fixed cylinder body (position adjustment part), 7321... Cylindrical part, 73211... Third guide hole (guide hole), 7322... Frame part, 73221... Hole, 73222... Hole, 733... Pin (position adjusting part), 7331... Bearing part, 734... Side part (position adjusting part), 7341... Through hole, 7342... Surface, 735... Adjusting screw (position adjusting part/screw), 7351 ... Head portion, 73511... Notch, 7352... Shaft portion, 735A... Nut, 736... Frame body (position adjusting portion), 7360... Opening portion, 7361... Through hole, 7362... Recessed portion, 737... Fixing screw (position adjusting portion) , 738... Regulation screw (position adjusting part), 7381... Washer, 8... Light source device housing (housing).

Claims (13)

A connecting member connected to a driving device having a rotating wheel on which light is incident;
The position of the front Symbol connecting member and a position adjusting section that adjusts along the incident direction of the light,
The position adjusting unit,
A fixed cylinder having a through hole extending in the incident direction, and accommodating at least a part of the connecting member in the through hole so as to be slidable in the incident direction;
A fixing member that restricts movement of the connecting member along the incident direction,
Before SL coupling member, by the regulation of the fixing member with respect to the movement of the connecting member is released, the position adjusting apparatus characterized by being re adjustably configure position in the incident direction. The position adjusting device according to claim 1,
The position adjusting unit,
A rotary cylinder that is provided around the fixed cylinder and rotates along the 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 cylindrical body, extending in a direction along the incident direction, into which the pin is inserted, and guiding the movement of the pin;
A second guide hole which is formed on a side surface of the rotary cylinder, extends in a direction inclined with respect to the incident direction, and into which the pin is inserted, and which guides the movement of the pin;
A first screw that surrounds a protruding portion provided at an end of the connecting member and that is screwed into the fixed tubular body;
A second screw that penetrates through the fixed cylinder and is screwed into the protruding portion,
The position adjusting device, wherein the 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 rotary cylinder has a lever for rotating the rotary cylinder. The position adjusting device according to claim 3,
The fixed cylindrical body has a first opening having a shape along the rotation direction of the rotary cylindrical body on the side opposite to the incident direction, and includes a diameter-expanded portion that spreads radially outward of the fixed cylindrical body,
A position adjusting device, wherein a part of the lever is inserted into the first opening. The position adjusting device according to claim 4,
A position adjusting device having a restricting portion for restricting movement of the lever. The position adjusting device according to any one of claims 2 to 5,
The first screw and the second screw are provided coaxially,
The position adjusting device, wherein the second screw has a shape that covers the first screw when viewed from the side opposite to the incident direction. The position adjusting device according to claim 1,
The position adjusting unit,
A pin projecting radially outward of the connecting member,
A guide hole formed on the side surface of the fixed cylinder, extending in the direction along the incident direction, into which the pin is inserted, and guiding the movement of the pin,
A side surface portion located on the side opposite to the incident direction of the fixed cylindrical body,
A screw having a head portion that abuts the side surface portion and a shaft portion that is screwed into a screwing portion of the connecting member;
A position adjusting device, comprising: a biasing member that is disposed between the connecting member and the side surface portion and that biases the connecting member in the insertion direction of the screw. The position adjusting device according to claim 7,
The biasing member is a coil spring,
The position adjusting device, wherein the coil spring is arranged so as to surround the screw. A position adjusting device according to any one of claims 1 to 8,
Wherein provided on the light-incident side of the rotating wheel, the wavelength conversion apparatus characterized by comprising: a wavelength conversion layer that converts a wavelength of incoming Isa the said light. A position adjusting device according to any one of claims 1 to 8,
Wherein provided on the light-incident side of the rotating wheel, diffuse reflector, characterized in that it comprises a diffusion reflection layer for diffusively reflecting the light incident Isa. 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 conversion device according to claim 9,
A diffuse reflection device according to claim 10;
A light synthesizing device for synthesizing and radiating 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 photosynthesis 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 housing. A light source device according to claim 11 or claim 12,
A light modulator for modulating the light emitted from the light source device;
A projection optical device that projects the light modulated by the light modulation device.

Images