JP6318554B2 - Light source device and projector - Google Patents

Description

  The present invention relates to a light source device and a projector.

  The projector modulates light emitted from the light source unit according to image information with a light modulation device, and enlarges and projects the obtained image with a projection lens. In recent years, a laser light source such as a semiconductor laser (LD) capable of obtaining light with high luminance and high output has attracted attention as a light source of a light source device used in such a projector.

  2. Description of the Related Art Conventionally, a projector including a light source device composed of a laser light source as described above uses a collimator lens array in which a plurality of spherical lenses are arranged in an array (see, for example, Patent Document 1 below).

JP2012-118220A

  However, in the above prior art, if the position of any one of the plurality of light sources constituting the array light source is deviated from a predetermined position, it is difficult to align the optical axes of each light source and each collimator lens. There was a problem.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a light source device and a projector capable of easily performing optical axis alignment.

According to the first aspect of the present invention, a plurality of light sources arranged in a first direction, a first cylindrical lens on which light from the plurality of light sources is incident, and light from the first cylindrical lens A light source device including an incident lens unit, a support member that supports the lens unit, and a guide portion provided on the support member, wherein the guide portion includes the first cylindrical lens and the lens. A spacer member for defining a distance from the unit, wherein a bus line of the first cylindrical lens is parallel to the first direction, and the lens unit includes a plurality of light sources provided corresponding to each of the plurality of light sources. A cylindrical lens, wherein a bus line of each of the plurality of cylindrical lenses intersects the first direction, the plurality of light sources includes a first light emitting element, The cylindrical lens includes a second cylindrical lens corresponding to the first light emitting element, and the second cylindrical lens is a cylindrical lens adjacent to the second cylindrical lens among the plurality of cylindrical lenses. Independently , the second cylindrical lens is arranged according to the arrangement of the first light emitting element, and the second cylindrical lens includes a lens surface formed of a cylindrical surface and a first flat surface which is a side surface intersecting the lens surface. And a second flat surface facing the lens surface, wherein the second cylindrical lens has the first flat surface in contact with the support member and the second flat surface is the first flat surface. 1 is arranged on the support member so as to face the cylindrical lens 1 and a part of the second flat surface is in contact with the spacer member. In state, the second light source cylindrical lens is fixed to the support member device is provided.

  According to the configuration of the light source device according to the first aspect, the light emitted from the light source by the first cylindrical lens and the second cylindrical lens can be collimated. Further, the optical axis alignment with the light source can be performed by moving each second cylindrical lens in the first direction. Therefore, optical axis alignment for each of the plurality of light sources can be performed easily and reliably.

In the first aspect, the maximum radiation angle direction of the light emitted from each of the plurality of light sources may be configured to intersect the first direction.
According to this configuration, the interval between the light sources in the first direction can be reduced. Therefore, the first cylindrical lens can be reduced in size.

In the first aspect, the second cylindrical lens has a first flat surface perpendicular to a lens surface of the second cylindrical lens, and the second cylindrical lens has the first flat surface. It is good also as a structure supported by the said supporting member via.
According to this configuration, the second cylindrical lens can be easily moved with respect to the support member during alignment.

In the first aspect, the second cylindrical lens has a second flat surface facing a lens surface of the second cylindrical lens, and the second flat surface is in contact with the guide portion. It is good also as composition which has.
According to this configuration, since the second flat surface moves along the guide portion, the second cylindrical lens can be easily translated. That is, it is possible to align the second cylindrical lens while keeping the incident angle of the light to the second cylindrical lens constant.
In this case, it is preferable that the second flat surface is configured to face the first cylindrical lens.
In this way, the second cylindrical lens and the first cylindrical lens are arranged to face each other with a predetermined distance apart by the guide portion. Therefore, it can prevent that a 2nd cylindrical lens and a 1st cylindrical lens contact.

In the first aspect, the guide portion may be configured to define an interval between the first cylindrical lens and the lens unit.
According to this configuration, the guide portion can function as a spacer between the first cylindrical lens and the second cylindrical lens.

The first aspect may further include a first plane that supports the plurality of light sources, and a bus line of the first cylindrical lens may be parallel to the first plane.
According to this configuration, the optical axes of the plurality of light sources and the first cylindrical lens can be easily adjusted.
In this case, it is preferable that the support member includes a second plane that supports the lens unit, and the first plane is parallel to the second plane.
In this way, it is possible to easily align the plurality of light sources and the lens unit.

  According to the second aspect of the present invention, an illumination device that emits illumination light, a light modulation device that forms image light obtained by modulating the illumination light according to image information, and a projection optical system that projects the image light And a projector using the light source device according to the first aspect as the illumination device.

  According to the configuration of the projector according to the second aspect, since the light source device described above is provided, the projector itself can easily perform optical axis alignment.

It is a top view which shows schematic structure of the projector which concerns on this embodiment. It is a top view which shows schematic structure of the illuminating device which concerns on this embodiment. (A), (b) is a figure which shows the principal part structure of a semiconductor laser. (A), (b) is a figure which shows the detailed structure of a collimating optical system. It is explanatory drawing of the alignment operation | movement of the optical axis in a collimating optical system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In addition, in the drawings used in the following description, in order to make the features easy to understand, there are cases where the portions that become the features are enlarged for the sake of convenience, and the dimensional ratios of the respective components are not always the same as the actual ones. Absent.

(projector)
First, an example of the projector 100 shown in FIG. 1 will be described.
FIG. 1 is a plan view showing a schematic configuration of the projector 100.

  The projector according to the present embodiment is a projection-type image display device that displays a color image (image) on a screen (projected surface). Further, a laser light source such as a semiconductor laser (LD) that can obtain light with high luminance and high output is used as a light source of an illumination device provided in the projector 100.

  Specifically, the projector 100 includes illumination devices 101R, 101G, and 101B, light modulation devices 102R, 102G, and 102B, a combining optical system 103, and a projection optical system 104.

  The illumination devices 101R, 101G, and 101B each emit laser light (illumination light) corresponding to each color of red (R), green (G), and blue (B).

  Each of the illumination devices 101R, 101G, and 101B has basically the same configuration except that semiconductor lasers corresponding to the colors of red (R), green (G), and blue (B) are used as light sources as described later. ing. And each illuminating device 101R, 101G, 101B irradiates illumination light toward each light modulation device 102R, 102G, 102B.

Each of the light modulation devices 102R, 102G, and 102B modulates the laser light from each of the lighting devices 101R, 101G, and 101B according to an image signal, and forms image light corresponding to each color.
Each of the light modulation devices 102R, 102G, and 102B includes a liquid crystal light valve (liquid crystal panel), and each forms image light obtained by modulating illumination light corresponding to each color according to image information. Note that polarizing plates (not shown) are arranged on the incident side and the emission side of each of the light modulation devices 102R, 102G, and 102B, and allow only linearly polarized light (for example, S-polarized light) in a specific direction to pass therethrough. It is like that.

The combining optical system 103 combines the image light from each of the light modulation devices 102R, 102G, and 102B.
The combining optical system 103 includes a cross dichroic prism, and image light from each of the light modulation devices 102R, 102G, and 102B is incident thereon. The combining optical system 103 combines the image light corresponding to each color and emits the combined image light toward the projection optical system 104.

  The projection optical system 104 includes a projection lens group, and enlarges and projects the image light combined by the combining optical system 103 toward the screen SCR. Thereby, an enlarged color video (image) is displayed on the screen SCR.

(Lighting device)
Next, a specific configuration of the lighting devices 101R, 101G, and 101B will be described.
Note that each of the illumination devices 101R, 101G, and 101B is basically the same as described above except that a semiconductor laser (light source) corresponding to each color of red (R), green (G), and blue (B) is used as a light source. The same configuration. Therefore, in the following description, the configuration of the lighting device 101R will be described as an example, and the detailed description of the lighting devices 101G and 101B will be omitted.

  FIG. 2 is a plan view illustrating a schematic configuration of the illumination device 101R, and FIGS. 3A and 3B are diagrams illustrating a configuration of a main part of a semiconductor laser that emits laser light in the illumination device. 4A and 4B are diagrams showing a detailed configuration of the collimating optical system in the illumination apparatus 101R, and FIG. 5 is a diagram for explaining alignment of the optical axis in the collimating optical system.

  As shown in FIG. 2, the illumination device 101R includes a light source unit 10, an afocal optical system 4, a diffractive optical element 6, and a superimposing optical system 7.

  The light source unit 10 includes an array light source 2 including a plurality of solid light sources 2a, and a collimator optical system 3 that converts incident light L1 emitted from each solid light source 2a into parallel light.

  The afocal optical system 4 adjusts the size (spot diameter) of the parallel light converted by the collimator optical system 3. The diffractive optical element 6 causes the diffracted light L2 to enter the superimposing optical system 7, and the light L3 superimposed by the superimposing optical system 7 is irradiated to the light modulation device 102R as illumination light.

  In the array light source 2, as shown in FIG. 3A, a plurality of solid light sources 2 a are arranged in a row on the upper surface (first plane) 21 a of the first base 21. FIG. 3A shows a state in which a plurality of (for example, seven) solid light sources 2a are installed on a first base 21 of the base portion 11 described later.

  As shown in FIG. 3B, the solid-state light source 2a is an elongated rectangular semiconductor laser having a longitudinal direction W1 and a lateral direction W2 when viewed from the optical axis direction of emitted light. The solid light source 2a emits red light (linearly polarized light) L1 having a polarization direction parallel to the longitudinal direction W1. The spread of the light L1 in the short direction W2 is larger than the spread of the light L1 in the longitudinal direction W1. Therefore, the cross-sectional shape BS of the light L has a rectangular shape or an elliptical shape with W2 as the longitudinal direction. That is, the maximum radiation angle direction of the light L1 emitted from each solid light source 2a can be defined by the short direction W2. In the present embodiment, the width of the solid light source 2a in the longitudinal direction W1 is, for example, 18 μm, and the width of the solid light source 2a in the short direction W2 is, for example, 2 μm, but the shape of the solid light source 2a is not limited to this.

  In the illumination device 101G, each solid light source 2a emits green light (linearly polarized light) to the light incident surface of the collimator optical system 3, and in the illumination device 101B, each solid light source 2a emits light from the collimator optical system 3. Blue light (linearly polarized light) is emitted to the surface.

  In this embodiment, the light source unit 10 has the array light source 2 and the collimator optical system 3, and the base part (support member) 11 holding these, as shown in FIG. Hereinafter, the description using FIGS. 4 and 5 will be made using the XYZ coordinate system. 4 and 5, the X direction defines the direction of the optical axis of the light L1 emitted from the solid light source 2a, the Y direction defines the arrangement direction of the plurality of solid light sources 2a, and the Z direction is orthogonal to the XZ direction. The vertical direction is defined.

  As shown in FIGS. 4A and 4B, the base portion 11 includes a first base 21 and a second base 22. The first base 21 is formed integrally with the second base 22. The upper surface (first plane) 21a of the first base 21 and the upper surface (second plane) 22a of the second base 22 are parallel to the YX plane that defines the horizontal plane. That is, the upper surface 21a and the upper surface 22a are parallel to each other, and the upper surface 21a is set at a position higher than the upper surface 22a. The first base 21 is designed so that the optical axis of the light L1 emitted from the solid-state light source 2a disposed on the upper surface 21a intersects the bus 8M of the front cylindrical lens 8 described later.

  The plurality of solid-state light sources 2a are arranged on the upper surface 21a of the first base 21 along the Y direction (first direction) with each laser light emitting surface parallel to the YZ plane. That is, in this embodiment, the light emission area | region of each solid light source 2a is arrange | positioned along the Y direction.

  In the present embodiment, the maximum radiation angle direction (short direction W2 shown in FIG. 3B) of the light L1 emitted from each solid light source 2a is the arrangement direction (first direction) of the solid light sources 2a. The Z direction is orthogonal to (intersects) a certain Y direction.

  The collimator optical system 3 includes a front cylindrical lens (first cylindrical lens) 8 and a lens unit 9. The front cylindrical lens 8 and the lens unit 9 are bonded and fixed to the upper surface 22 a of the second base 22.

  The front-stage cylindrical lens 8 has a generatrix 8M along the Y direction, a convex cylindrical surface (lens surface) 8a, and a flat back surface 8b. That is, the bus 8M of the front cylindrical lens 8 is parallel to the upper surface 21a of the first base 21 on which the plurality of solid light sources 2a are arranged.

The front cylindrical lens 8 is arranged so that the back surface 8b (back surface) side faces the light emitting region of each solid-state light source 2a. In the present embodiment, the front cylindrical lens 8 has an installation surface 8c having a flat side surface, and the installation surface 8c is fixed to the upper surface 22a of the second base 22 so that the back surface 8b is along the vertical direction. Be placed. In the present embodiment, the spacer member 30 is disposed between the installation surface 8c and the upper surface 22a, but the spacer member 30 may not be disposed. By providing the spacer member 30, the height of the front cylindrical lens 8 can be adjusted so that the optical axis of the light L <b> 1 intersects with the bus 8 </ b> M of the front cylindrical lens 8.
Based on such a configuration, the front cylindrical lens 8 collimates the light L1 in the ZX plane by generating a lens effect only in the ZX plane orthogonal to the generatrix.

  On the other hand, the lens unit 9 includes a plurality of cylindrical lenses (second cylindrical lenses) 12. The lens unit 9 includes a number of cylindrical lenses 12 corresponding to the solid light sources 2a. Each cylindrical lens 12 is arranged in accordance with the arrangement of the solid light source 2a independently of the other adjacent cylindrical lenses 12.

The cylindrical lens 12 is disposed such that its bus 12M intersects the bus direction (Y direction) of the preceding cylindrical lens 8. In the present embodiment, the bus 12 </ b> M is orthogonal to the bus direction of the front cylindrical lens 8. That is, the cylindrical lens 12 has a generatrix along the Z direction, a convex cylindrical surface (lens surface) 12a, and a flat surface (second flat surface) 12b. The cylindrical lens 12 is disposed so that the flat surface 12b (back surface) side faces the cylindrical surface 8a of the preceding cylindrical lens 8. In the present embodiment, the cylindrical lens 12 has a flat installation surface (first flat surface) 12c on the side surface, and the installation surface 12c is fixed to the upper surface 22a of the second base 22 so as to be a flat surface. 12b is arranged along the vertical direction.
Based on such a configuration, the cylindrical lens 12 collimates the light L1 in the XY plane by causing a lens effect only in the XY plane orthogonal to the generatrix.

  In the present embodiment, the front cylindrical lens 8 is bonded and fixed to the upper surface 22a with the distance from the first base 21 (solid light source 2a) being held at a predetermined distance via the spacer member 31. The spacer member 31 is the upper surface 22 a of the second base 22 and is disposed between the side surface of the first base 21 and the rear surface 8 b of the front cylindrical lens 8.

  Further, the cylindrical lens 12 is bonded and fixed to the upper surface 22a in a state in which the distance from the preceding cylindrical lens 8 is held at a predetermined distance via the spacer member 32. The cylindrical lens 12 is bonded and fixed in a state where the alignment described later with respect to the optical axis of the solid light source 2a is performed.

  Thus, the light source unit 10 according to the present embodiment can convert the light L1 emitted from the solid light source 2a into parallel light by the collimator optical system 3 including two cylindrical lenses.

Then, the assembly method of the light source unit 10 is demonstrated.
First, the base unit 11 having a plurality of solid light sources 2a (array light sources 2) installed on the upper surface 21a of the first base 21 is prepared. Subsequently, the front cylindrical lens 8 and the lens unit 9 are temporarily disposed on the upper surface 22 a of the second base 22 of the base portion 11. At this time, the spacer members 30, 31, 32 are also arranged.

  The thickness of the spacer member 30 is adjusted so that the optical axis of the light L1 emitted from the solid light source 2a and the front cylindrical lens 8 have a predetermined positional relationship. For example, the thickness of the spacer member 30 is adjusted so that the optical axis of the light L1 emitted from the solid light source 2a intersects the bus 8M. In the present embodiment, since the bus 8M of the front cylindrical lens 8 is parallel to the upper surface 21a of the first base 21, the optical axes of the plurality of solid light sources 2a and the front cylindrical lens 8 can be easily aligned.

  In this state, for example, a lens pressing member is pressed against the cylindrical surface 12a side of the cylindrical lens 12 with a screw through a biasing member such as a spring so that the front cylindrical lens 8 and the cylindrical lens 12 are not tilted.

  Here, since the front cylindrical lens 8 produces a lens effect only in the XZ plane, it is not necessary to consider alignment with the solid-state light source 2a in the Y direction. In the present embodiment, the front cylindrical lens 8 is held at a predetermined distance from the solid light source 2 a via the spacer member 31. Therefore, the front cylindrical lens 8 is guided in the Z direction in contact with the spacer member (guide member) 31 during adjustment. Therefore, alignment (alignment) with respect to the solid-state light source 2a in the front-stage cylindrical lens 8 is simple because only one direction (Z direction) needs to be considered. In the present embodiment, the spacer member 31 is used as a guide part when the front cylindrical lens 8 is moved, but the present invention is not limited to this, and the wall may be a wall or a bowl-like part provided on the upper surface 22a.

  After the alignment of the front cylindrical lens 8, the UV curable adhesive is infiltrated into the gaps between the spacer members 30, 31, 32, the front cylindrical lens 8, the cylindrical lens 12, and the base portion 11.

  Subsequently, by moving each cylindrical lens 12 independently in the horizontal direction using, for example, a tool such as tweezers, a spot of the light L1 emitted from the solid light source 2a and transmitted through the previous cylindrical lens 8 is a predetermined value. Adjust so that it is in position.

  For example, the cylindrical lens 12 is moved in the horizontal direction (Y direction) on the upper surface 22a of the second base 22 while the light L1 through the cylindrical lens 12 is irradiated on the screen SCR. Since the installation surface 12c is a flat surface, the cylindrical lens 12 can be easily moved with respect to the upper surface 22a. In the present embodiment, since the upper surface 22a of the second base 22 and the upper surface 21a of the first base 21 are parallel to each other, the base portion 11 is aligned with the plurality of solid light sources 2a and the respective cylindrical lenses 12. Can be easily performed.

  At this time, as shown in FIG. 5, the spot of the light L1 moves on the screen SCR. For example, the alignment (alignment) of the cylindrical lens 12 with respect to the solid light source 2a can be performed by comparing with the alignment mark MK marked on the screen SCR. For example, the light L1 emitted from the cylindrical surface 12a of the cylindrical lens 12 is adjusted to a position where it is converted into parallel light along the X direction.

Here, since the cylindrical lens 12 produces a lens effect only in the XY plane, it is not necessary to consider alignment with the solid light source 2a in the Z direction. In the present embodiment, the cylindrical lens 12 is maintained at a predetermined distance from the preceding cylindrical lens 8 via the spacer member 32. Therefore, the cylindrical lens 12 is smoothly guided while the flat surface 12b is in contact with the spacer member (guide member) 32 at the time of adjustment, and alignment becomes easy. In addition, the spacer member 32 prevents the cylindrical lens 12 and the front-stage cylindrical lens 8 from contacting each other during alignment. Further, the alignment of the cylindrical lens 12 can be easily performed while keeping the incident angle of the light L1 to the cylindrical lens 12 constant.
Therefore, the alignment (alignment) of the cylindrical lens 12 with respect to the solid light source 2a is simple because only one direction (Y direction) needs to be considered. In the present embodiment, the spacer member 32 is used as a guide portion when the cylindrical lens 12 is moved, but the present invention is not limited to this, and the guide may be a wall or a bowl-shaped portion provided on the upper surface 22a.

As described above, after the alignment of the front cylindrical lens 8 and each cylindrical lens 12 with respect to the solid light source 2a is completed, UV light is irradiated from above to fix the adhesive. Thereafter, the lens pressing member, spring, screw and the like are removed. The lens holder may be bonded to the cylindrical lens 12 with an adhesive.
In this way, the assembly of the light source unit 10 according to the present embodiment is completed.

  Returning to FIG. 2, the afocal optical system 4 includes lenses 4a and 4b. The diffractive optical element 6 includes a computer generated hologram (CGH).

  The diffractive optical element 6 diffracts the incident light L1 to uniformize the intensity distribution of red light (diffracted light) L1 incident on the light modulation device 102R, which will be described later, and to enter the light modulation device 102R. It has a function to increase the utilization efficiency of L1.

  The diffractive optical element 6 is a surface relief type hologram element having a fine concavo-convex structure designed by a computer on the surface of a base material made of a light transmissive material such as quartz (glass) or synthetic resin. The diffractive optical element 6 is a wavefront conversion element that converts the wavefront of incident light using a diffraction phenomenon. In particular, in the phase modulation type CGH, wavefront conversion is possible with almost no loss of incident light wave energy. Accordingly, CGH can generate a uniform intensity distribution or a simple intensity distribution.

  The diffraction element pattern has such a fine uneven structure, and is formed with a plurality of recesses formed in a rectangular shape in cross section at different depths, and in a rectangular shape in cross section at different heights between these recesses. And a convex portion. In the diffractive optical element 6, in the diffractive element pattern, the diffractive element pattern can have a desired diffusion function by appropriately adjusting design conditions including the width of the concave portion and the depth of the concave portion (height of the convex portion). it can. Further, as a technique for optimizing the setting conditions of the diffraction element pattern, for example, a calculation technique such as an iterative Fourier method can be cited.

  Here, a plurality of light beams emitted from the polarization direction conversion element 5 are incident on the diffractive optical element 6. For this reason, a plurality of first-order diffracted lights are emitted from the diffractive optical element 6. Moreover, the chief rays of the respective first-order diffracted lights are parallel to each other. Therefore, in the present invention, a bundle of these first-order diffracted lights is handled as one diffracted light L2 unless otherwise specified. The direction of the principal ray at the center of the diffracted light L2 passes through the center of the bundle of the plurality of first-order diffracted lights and is parallel to the principal ray of each first-order diffracted light.

  The diffractive optical element 6 has a rectangular light distribution as a whole, and the aspect ratio (aspect ratio) of this light distribution is the aspect ratio (aspect ratio) of the illumination target (image forming area of the light modulation device). A diffracted light distribution that coincides with is generated. Accordingly, the illumination light having a rectangular shape as a whole can be efficiently incident on the image forming regions of the light modulation devices 102R, 102G, and 102B having the rectangular shape.

  Further, in the diffractive optical element 6, it is preferable that the light L <b> 1 is incident perpendicular to the incident surface 6 a of the diffractive optical element 6. The optical axis direction of the light L1 is orthogonal to the incident surface 6a. This facilitates the diffractive optical design of CGH for obtaining the above-described diffracted light L2.

  According to the illuminating device 101R having the above-described configuration, when the optical axes of the collimator optical system 3 and the solid light source 2a are aligned, each cylindrical lens 12 crosses the first direction (the bus line of the cylindrical lens 12). It can be done simply by moving it in the direction). Therefore, the optical axis alignment for each of the plurality of solid state light sources 2a can be performed easily and reliably.

  Further, the maximum radiation angle direction of the light L1 emitted from each solid light source 2a is orthogonal to the arrangement direction of the solid light sources 2a. The front-stage cylindrical lens 8 collimates the light L1 in the generatrix direction of the cylindrical lens 12. Therefore, according to the present embodiment, cost reduction can be achieved by downsizing the cylindrical lens 12.

  Further, by using CGH as the diffractive optical element 6, it is possible to generate illumination light having a more uniform illuminance distribution (brightness) while reducing the aberration caused by the superimposing optical system 7. And such illumination light can be efficiently irradiated with respect to the image formation area of the said light modulation apparatus 102R used as illumination object.

  Therefore, by applying the illumination devices 101R, 101G, and 101B to the projector 100, it is possible to perform display with excellent image quality while further reducing the size of the projector 100 itself.

  In the projector 100 according to the present embodiment, since illumination light with a predetermined linear polarization is emitted from each of the illumination devices 101R, 101G, and 101B, the illumination light can be reliably incident on the light modulation devices 102R, 102G, and 102B. .

  In addition, although one embodiment of the present invention has been illustrated and described, the present invention is not necessarily limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. It is.

  In the above embodiment, the projector 100 including the three light modulation devices 102R, 102G, and 102B is exemplified. However, the projector 100 can be applied to a projector that displays a color image (image) with one light modulation device. Further, the light modulation device is not limited to the above-described liquid crystal panel, and for example, a digital mirror device (DMD: registered trademark of Texas Instruments Inc., USA) can be used.

  Moreover, in the said embodiment, although the surface relief type | mold hologram element was used as the diffractive optical element 6, you may use a volume hologram type element. Further, a composite hologram element of a surface relief hologram and a volume hologram may be used.

2a ... Solid light source (light source), 8 ... Pre-stage cylindrical lens (first cylindrical lens), 8M ... Busbar, 8a, 12a ... Cylindrical surface (lens surface), 8c ... Installation surface (first flat surface), 9 ... Lens unit, 11 ... base portion (first support portion), 12 ... cylindrical lens (second cylindrical lens), 12M ... busbar, 12b ... flat surface (second flat surface), 12c ... installation surface (first Flat surface), 21a ... upper surface (first plane), 22a ... upper surface (second plane), 31, 32 ... spacer member (guide portion), 100 ... projector, 101R, 101G, 101B ... illumination device, 104 ... projection optics.

Claims (5)

A plurality of light sources arranged in a first direction;
A first cylindrical lens on which light from the plurality of light sources is incident;
A lens unit on which light from the first cylindrical lens is incident;
A support member for supporting the lens unit;
A light source device comprising a guide portion provided on the support member,
The guide portion includes a spacer member that defines an interval between the first cylindrical lens and the lens unit;
A generatrix of the first cylindrical lens is parallel to the first direction;
The lens unit includes a plurality of cylindrical lenses provided corresponding to the plurality of light sources,
The generatrix of each of the plurality of cylindrical lenses intersects the first direction,
The plurality of light sources includes a first light emitting element,
The plurality of cylindrical lenses include a second cylindrical lens corresponding to the first light emitting element,
The second cylindrical lens is arranged according to the arrangement of the first light emitting element independently of the cylindrical lens adjacent to the second cylindrical lens among the plurality of cylindrical lenses ,
The second cylindrical lens has a lens surface composed of a cylindrical surface, a first flat surface that is a side surface intersecting with the lens surface, and a second flat surface facing the lens surface,
The second cylindrical lens is disposed on the support member such that the first flat surface is in contact with the support member and the second flat surface is opposed to the first cylindrical lens,
The light source device , wherein the second cylindrical lens is fixed to the support member in a state where a part of the second flat surface is in contact with the spacer member .   2. The light source device according to claim 1, wherein a maximum radiation angle direction of light emitted from each of the plurality of light sources intersects the first direction. A first plane supporting the plurality of light sources;
The generatrix of the first cylindrical lens is a light source apparatus according to claim 1 or 2, characterized in that parallel to the first plane. The light source device according to claim 3 , wherein the support member includes a second plane that supports the lens unit, and the first plane is parallel to the second plane. An illumination device that emits illumination light;
A light modulation device that modulates the illumination light according to image information to form image light;
A projection optical system for projecting the image light,
The projector which uses the light source device as described in any one of Claims 1-4 as said illuminating device.

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