JP5849578B2 - Lens fixing mechanism, light source device and projector - Google Patents

Description

  The present invention relates to a lens fixing mechanism, a light source device, and a projector.

  In general, a projector is known as an image projection apparatus that projects an image based on image data output from a personal computer or the like onto a screen or the like. As one type of such a projector, light emitted from a light source is condensed on a micromirror display element called a digital micromirror device (DMD; registered trademark), and an image is reflected by reflected light from the micromirror display element. A projector that employs a forming method is known.

  Conventionally, as a light source in such a projector, a high-intensity discharge lamp is often used. In recent years, various projectors using a light emitting diode, a laser diode, an organic EL, a phosphor or the like as a light source have been developed. For example, Patent Document 1 discloses a technique related to a projector using a light source in which a plurality of laser diodes are arranged in an array.

JP 2011-076781 A

  For example, in the technique according to Patent Document 1, a plurality of collimator lenses are aligned and fixed by a fixing member so as to correspond to the laser diodes arranged in an array in the light source. In fixing the collimator lens, when the collimator lens is sandwiched from above and below, high accuracy is required for the dimensions of the upper and lower fixing members. If there is a dimensional error in the upper and lower fixing members, for example, the collimator lens may be damaged or its optical axis may be shifted.

  It is an object of the present invention to provide a lens fixing mechanism that can fix a plurality of lenses at appropriate positions, and a light source device and a projector using the same.

In order to achieve the above object, one aspect of the lens fixing mechanism of the present invention is a lens fixing mechanism that arranges and fixes a plurality of lenses in a plane perpendicular to the optical axis, and accommodates each of the plurality of lenses. A plurality of holes for positioning the plurality of lenses in the plane, and a plurality of firsts for suppressing movement of the plurality of lenses in a first direction parallel to the optical axis in each of the plurality of holes. And a first member formed smaller than each of the plurality of lenses through which light passing through the plurality of lenses passes, and each of the plurality of lenses is disposed. A lens pressing tool having a plurality of second contact portions provided corresponding to the positions, and a connecting portion for movably connecting the plurality of second contact portions, and light passing through the plurality of lenses passes. Set at each position A second hole that is, anda retainer plate for fixing pressed to each of the first contact portion of the plurality of lenses by pressing the lens retainer to the plurality of lenses, the first The second hole is larger than the first hole and smaller than the second contact portion .

  In order to achieve the object, an aspect of the light source device according to the present invention includes a plurality of light sources arranged on a plane, a plurality of lenses, and the plurality of light sources on the optical axis of light emitted from each of the light sources. And a holding member for holding the plurality of light sources and the lens fixing mechanism.

  In order to achieve the above object, an aspect of the projector of the present invention includes the above-described light source device, and projects a projection image formed using light emitted from the light source device onto a projection target. Features.

  According to the present invention, it is possible to provide a lens fixing mechanism that can fix a plurality of lenses at appropriate positions, and a light source device and a projector using the lens fixing mechanism.

1 is a block diagram showing an outline of a configuration example of a projector according to an embodiment of the invention. 1 is a block diagram showing an outline of an example of an optical system of a projector according to an embodiment of the invention. The perspective view which shows the outline of the structural example of a laser light source unit. The figure which shows the outline of the cross section of the structural example of a laser light source unit. The figure which shows the outline of the structural example of a lens pressing tool. The disassembled perspective view which shows the outline of the structural example of a laser light source unit. The figure for demonstrating the sheet metal as a comparative example of a lens pressing tool.

  An embodiment of the present invention will be described with reference to the drawings. The projection apparatus according to the present embodiment uses a digital light processing (DLP) (registered trademark) system using a micromirror display element. An outline of the configuration of the projector 10 of the present embodiment is shown in FIG. The projector 10 includes an input unit 11, an image conversion unit 12, a projection processing unit 13, a micromirror element 14, a light source unit 15, a mirror 16, a projection lens unit 17, a CPU 18, a main memory 19, A program memory 20, an operation unit 21, an audio processing unit 22, and a speaker 23 are included.

  The input unit 11 is provided with terminals such as a pin jack (RCA) type video input terminal and a D-sub15 type RGB input terminal, for example, and an analog image signal is input thereto. The input unit 11 converts input analog image signals of various standards into digital image signals. The input unit 11 outputs the converted digital image signal to the image conversion unit 12 via the system bus SB. Note that the input unit 11 may be provided with, for example, an HDMI (registered trademark) terminal and the like so that not only an analog image signal but also a digital image signal can be input. In addition, an audio signal based on an analog or digital signal is input to the input unit 11. The input unit 11 outputs the input audio signal to the audio processing unit 22.

  The image conversion unit 12 is also referred to as a scaler. The image conversion unit 12 converts the input image data into image data having a predetermined format suitable for projection, and transmits the converted data to the projection processing unit 13. If necessary, the image conversion unit 12 transmits image data on which symbols indicating various operation states for On Screen Display (OSD) are superimposed to the projection processing unit 13 as processed image data.

  The light source unit 15 emits light of a plurality of colors including primary color lights of red (R), green (G), and blue (B). Here, the light source unit 15 is configured to sequentially emit a plurality of colors in a time division manner. The light emitted from the light source unit 15 is totally reflected by the mirror 16 and enters the micromirror element 14.

  The micromirror element 14 has a plurality of micromirrors arranged in an array. Each micromirror is turned on / off at high speed to reflect the light emitted from the light source unit 15 toward the projection lens unit 17 or to deflect the light from the direction of the projection lens unit 17. In the micromirror element 14, micromirrors are arranged, for example, for WXGA (Wide eXtended Graphics Array) (horizontal 1280 pixels × vertical 800 pixels). The micromirror element 14 forms, for example, an image with WXGA resolution by reflection at each micromirror. Thus, the micromirror element 14 functions as a spatial light modulation element.

  The projection processing unit 13 drives the micromirror element 14 in order to display the image represented by the image data in accordance with the image data transmitted from the image conversion unit 12. That is, the projection processing unit 13 turns on / off each micromirror of the micromirror element 14. Here, the projection processing unit 13 drives the micromirror element 14 in a time-sharing manner at high speed. The number of divisions per unit time is a number obtained by multiplying a frame rate according to a predetermined format, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations. Further, the projection processing unit 13 controls the operation of the light source unit 15 in synchronization with the operation of the micromirror element 14. In other words, the projection processing unit 13 controls the operation of the light source unit 15 so as to time-divide each frame and sequentially emit light of all color components for each frame.

  The projection lens unit 17 adjusts the light guided from the micromirror element 14 to light projected onto, for example, a screen (not shown). Therefore, the optical image formed by the reflected light from the micromirror element 14 is projected and displayed on the screen via the projection lens unit 17.

  The sound processing unit 22 includes a sound source circuit such as a PCM sound source. Based on analog audio data input from the input unit 11 or based on a signal obtained by analogizing digital audio data given during a projection operation, the audio processing unit 22 drives the speaker 23 to emit a loud sound. The voice processing unit 22 generates a beep sound or the like as necessary. The speaker 23 is a general speaker that emits sound based on a signal input from the sound processing unit 22.

  The CPU 18 controls operations of the image conversion unit 12, the projection processing unit 13, and the sound processing unit 22. The CPU 18 is connected to the main memory 19 and the program memory 20. The main memory 19 is constituted by an SRAM, for example. The main memory 19 functions as a work memory for the CPU 18. The program memory 20 is composed of an electrically rewritable nonvolatile memory. The program memory 20 stores an operation program executed by the CPU 18 and various fixed data. The CPU 18 is connected to the operation unit 21. The operation unit 21 includes a key operation unit provided in the main body of the projector 10 and an infrared light receiving unit that receives infrared light from a remote controller (not shown) dedicated to the projector 10. The operation unit 21 outputs to the CPU 18 a key operation signal based on a key operated by a user with a key operation unit of the main body or a remote controller. The CPU 18 controls the operation of each unit of the projector 10 in accordance with a user instruction from the operation unit 21 using programs and data stored in the main memory 19 and the program memory 20.

  An optical system of the projector 10 according to this embodiment including the light source unit 15, the mirror 16, the micromirror element 14, and the projection lens unit 17 will be described with reference to FIG. The light source unit 15 is provided with a laser light source unit 100 having a semiconductor laser (laser diode; LD) 120, which is a semiconductor light emitting element that emits blue laser light, as a light source. The LDs 120 are arranged in an array in the laser light source unit 100. For example, in the present embodiment, a total of 24 LDs 120 are arranged in an array in 3 rows and 8 columns. The blue laser light emitted from each LD 120 passes through a collimator lens 150 disposed corresponding to each LD 120 to become parallel light, and is emitted from the laser light source unit 100.

  At a position facing the collimator lens 150, the mirror 32 is arranged in a step shape. The laser light emitted from the laser light source unit 100 is reflected by the mirror 32 and is combined into one light flux while changing its optical path by 90 degrees. Lenses 33 and 34 and a first dichroic mirror 35 are arranged on the optical path of this light beam. The laser beam reflected by the mirror 32 is converted into a parallel light beam by the lenses 33 and 34 and then enters the first dichroic mirror 35. The first dichroic mirror 35 transmits blue light. Lenses 36 and 37 and a fluorescent wheel 38 are disposed in the optical path of the transmitted light. The blue light transmitted through the first dichroic mirror 35 is irradiated to the fluorescent wheel 38 through the lenses 36 and 37.

  The fluorescent wheel 38 has a disk shape. The fluorescent wheel 38 is divided into two regions, one of which is formed with a diffusing plate for transmission, and the other is formed with a phosphor layer. A fluorescent layer is formed on the surface of the fluorescent wheel 38 where the fluorescent material layer exists by applying a fluorescent material to the surface irradiated with the laser light from the laser light source unit 100. This phosphor is a phosphor that emits green fluorescence when irradiated with blue light. A reflective plate is formed on the back surface of the fluorescent layer. The diffusion plate of the fluorescent wheel 38 is a plate that transmits blue light and diffuses the light. The fluorescent wheel 38 is rotated by driving a motor (M) 39 which is a rotation driving unit. This rotation is synchronously controlled by the projection processing unit 13 together with the micromirror element 14. In the control, the projection processing unit 13 detects the rotation of a marker (not shown) formed on the fluorescent wheel 38 and uses the detection result.

  When the blue laser light enters the fluorescent layer of the fluorescent wheel 38, it emits green fluorescent light. This green fluorescence is emitted isotropically. The fluorescence emitted to the back side of the fluorescent layer is reflected by the reflector. Therefore, the fluorescence emitted from the fluorescent layer is guided to the lenses 37 and 36 side. The green light that has passed through the lenses 37 and 36 enters the first dichroic mirror 35.

  The first dichroic mirror 35 reflects green light. A lens 41 and a second dichroic mirror 42 are disposed in the optical path of the reflected light. The green light reflected by the first dichroic mirror 35 enters the second dichroic mirror 42 via the lens 41. The second dichroic mirror 42 reflects green light. In the optical path of the reflected light, a lens 43, an integrator 44, a lens 45, a mirror 46, a lens 47, and a mirror 16 are arranged in this order. The integrator 44 is an element that makes the luminance distribution of the light beam uniform. The green light reflected by the second dichroic mirror 42 passes through the integrator 44 through the lens 43 to become a luminous flux having a uniform luminance distribution, and enters the mirror 16 through the lens 45, the mirror 46, and the lens 47.

  Further, when the diffusion plate of the fluorescent wheel 38 is on the optical path of the blue laser light emitted from the laser light source unit 100, the blue laser light passes through the following path. The blue laser light emitted from the laser light source unit 100 is incident on the diffusion plate of the fluorescent wheel 38 and passes through the diffusion plate while diffusing. A lens 50, a mirror 51, a lens 52, a mirror 53, a lens 54, and a second dichroic mirror 42 are arranged on the optical path of the transmitted light. The blue light transmitted through the diffusion plate is reflected by the mirror 51 through the lens 50, further reflected by the mirror 53 through the lens 52, and enters the second dichroic mirror 42 through the lens 54. The second dichroic mirror 42 transmits blue light. The blue light transmitted through the second dichroic mirror 42 passes through the integrator 44 via the lens 43 and becomes a light flux having a uniform luminance distribution. The blue light emitted from the integrator 44 enters the mirror 16 via the lens 45, the mirror 46, and the lens 47.

  The light source unit 15 further includes a light emitting diode (LED) 55 which is a semiconductor light emitting element that emits red light as a light source. Lenses 56 and 57 and a first dichroic mirror 35 are disposed on the optical path of the light emitted from the LED 55. The red light emitted from the LED 55 enters the first dichroic mirror 35 via the lenses 56 and 57. The first dichroic mirror 35 transmits red light. The red light transmitted through the first dichroic mirror 35 is incident on the second dichroic mirror 42 via the lens 41. The second dichroic mirror 42 reflects red light. The red light reflected by the second dichroic mirror 42 passes through the integrator 44 via the lens 43 and becomes a light flux having a uniform luminance distribution. The red light emitted from the integrator 44 enters the mirror 16 through the lens 45, the mirror 46, and the lens 47.

  The green light, the blue light, and the red light reflected by the mirror 16 are irradiated to the micromirror element 14 through the lens 48, respectively. The micromirror element 14 forms a light image by reflected light toward the projection lens unit 17. This optical image is irradiated onto a screen or the like (not shown) to be projected via the lens 48 and the projection lens unit 17.

  An operation of the projector 10 according to the present embodiment will be described. The following operations are executed by the projection processing unit 13 under the control of the CPU 18. The projection processing unit 13 controls the light emission timing of the blue light emitting LD 120 and the red light emitting LED 55 of the laser light source unit 100, the rotation timing of the fluorescent wheel 38 synchronized with this light emission timing, and the operation of the micromirror element 14. Be controlled.

  For example, a case where light of three colors of red light (R), green light (G), and blue light (B) is incident on the micromirror element 14 will be described as an example. At the timing when the red light is incident on the micromirror element 14, the LED 55 for red light emission is turned on and the LD 120 for blue light emission is turned off. At the timing when the green light is incident on the micromirror element 14, the red light emitting LED 55 is turned off and the blue light emitting LD 120 is turned on. At this time, the fluorescent wheel 38 is rotated by the motor 39 so that the fluorescent layer is positioned in the optical path of the blue light. At the timing when the blue light is incident on the micromirror element 14, the LED 55 for red light emission is turned off and the LD 120 for blue light emission is turned on. At this time, the fluorescent wheel 38 is configured such that the diffusion plate is positioned in the optical path of the blue light by the rotation of the motor 39. As described above, the red light, the green light, and the blue light are sequentially incident on the micromirror element 14 by controlling the lighting and extinguishing of the LED 55 and the LD 120 and the rotation angle of the fluorescent wheel 38 by the motor 39.

  The micromirror element 14 increases the time for guiding the incident light to the projection lens unit 17 as the luminance based on the image data is higher for each minute mirror (each pixel) for each color light, and reduces the incident light as the luminance is lower. The time for guiding to the projection lens unit 17 is shortened. That is, the projection processing unit 13 causes the micromirror element 14 so that the micromirror corresponding to the pixel with low luminance is turned on for a long time so that the micromirror corresponding to the pixel with low luminance is turned off for a long time. To control. By doing in this way, the brightness | luminance of each color can be expressed for every minute mirror (each pixel) about the light inject | emitted from the projection lens part 17. FIG.

For each frame, an image is expressed by combining the brightness expressed by the time when the micromirror is on for each color. As described above, the projection lens unit 17 emits projection light representing an image. By projecting this projection light onto, for example, a screen, an image is displayed on the screen or the like.
In the above description, an example of a projector that uses three colors of red light, green light, and blue light has been described. However, these colors may be used to form an image by combining complementary colors such as magenta and yellow, white light, and the like. The projector may be configured so as to emit the light.

  Details of the structure of the laser light source unit 100 according to the present embodiment will be described with reference to FIGS. A perspective view of the laser light source unit 100 is shown in FIG. 3, and a sectional view thereof is shown in FIG. In the laser light source unit 100, the LD 120 is fixed to the first fixing member 130. That is, the first fixing member 130 is provided with a recess. The inner diameter of the recess is substantially the same as the outer diameter of the bottom of the LD 120. In this way, the bottom of the LD 120 is fixed to the first fixing member 130 by fitting.

  A heat sink 110 having heat radiation fins 112 is connected to the first fixing member 130. The radiating fins 112 are provided to release heat generated from the LD 120, and cooling air is applied from a cooling fan (not shown). Therefore, the heat generated from the LD 120 is radiated from the radiation fins 112.

  The second fixing member 140 is superimposed on the first fixing member 130. The second fixing member 140 is provided with a through hole 142 corresponding to the position of the LD 120. The inner diameter of the through hole 142 on the first fixing member 130 side is larger than the outer diameter of the upper part of the LD 120, that is, the part on the side emitting the blue laser light. In this way, the upper portion of the LD 120 is disposed in the through hole 142. The inner diameter of the through hole 142 opposite to the first fixing member 130 is substantially the same as the outer diameter of the collimator lens 150. Each collimator lens 150 is disposed in the through hole 142, and is positioned in a plane orthogonal to the optical axis by the through hole 142. Further, the through hole 142 is provided with a step 144 such that the inner diameter on the LD 120 side is smaller than the outer diameter of the collimator lens 150. The step 144 forms a gap between the collimator lens 150 and the LD 120. That is, the collimator lens 150 is positioned in the optical axis direction by the step 144 so as not to move to the LD 120 side from a predetermined position.

  In order to press the collimator lens 150 toward the LD 120 side, a lens pressing tool 160 and a pressing sheet metal 170 are disposed. The structure of the lens pressing tool 160 is shown in FIG. As shown in this figure, the lens presser 160 has a total of 24 rings 162 in 3 rows and 8 columns corresponding to the number of collimator lenses 150. The inner diameter of the ring 162 is smaller than the outer diameter of the collimator lens 150 on the emission side. The rings 162 are connected to each other by a connecting portion 164. The connecting portion 164 has a curved shape. Here, the thickness of the ring 162 and the connecting portion 164 is, for example, about 0.2 mm, and the thickness of the connecting portion 164 is, for example, about 0.2 mm as well as the thickness. The connecting portion 164 has flexibility and can change the distance between the rings 162. The lens pressing tool 160 can be integrally formed by pattern etching of a sheet metal, for example. The lens pressing tool 160 is easily formed by integral formation. The hole of the ring 162 is a hole through which the light that has passed through the collimator lens 150 passes.

  The presser metal plate 170 has a total of 24 circular holes in 3 rows and 8 columns corresponding to the number of collimator lenses 150. This hole is a hole through which the light passing through the collimator lens 150 passes. The diameter of the hole is larger than the inner diameter of the ring 162 of the lens pressing tool 160 and smaller than the outer diameter of the ring 162. By fitting each ring 162 of the lens presser 160 on the exit side of each collimator lens 150 and pressing the lens presser 160 against the LD 120 side by the presser metal plate 170, the collimator lens 150 is fixed so as not to move in the optical axis direction. The As shown in an exploded perspective view of the laser light source unit 100 in FIG. 6, the lens pressing tool 160 and the pressing metal plate 170 are fixed to the second fixing member 140 with screws 180. As described above, the collimator lens 150 is fixed in the second fixing member 140. Therefore, if the second fixing member 140 is formed with sufficient accuracy, the collimator lens 150 is fixed with an appropriate optical axis. In addition, by making the diameter of the hole of the pressing metal plate 170 larger than the inner diameter of the ring 162 of the lens pressing tool 160 and smaller than the outer diameter of the ring 162, the light passing through the hole of the ring 162 is not blocked and the ring 162 is It can be pressed in the direction of the collimator lens 150.

  The blue laser light emitted from the LD 120 enters the collimator lens 150, and the blue laser light converted into parallel light by the collimator lens 150 passes through a hole formed in the holding plate 170 and is emitted from the laser light source unit 100. Is done.

  According to the present embodiment, the lens pressing member 160 can slightly change the pitch between the rings 162 by the bending of the connecting portion 164 that connects the ring 162 and the ring 162. As a result, the center axis of each ring 162 exactly matches the center axis of the plurality of collimator lenses 150, and the lens pressing member 160 can accurately fix all the collimator lenses 150. That is, the optical axis can be accurately aligned.

  The shape of the ring 162 is not limited to an annular shape as in the present embodiment. The shape of the ring 162 may be polygonal in its outer shape and / or hole shape, for example. However, when the collimator lens 150 having a symmetrical shape with respect to the optical axis is used, it is preferable that the ring 162 has an annular shape, and in particular, the hole has a circular shape. This is because, since the ring 162 has an annular shape, a force can be applied to the collimator lens 150 evenly from each direction, and the collimator lens 150 can be prevented from being damaged. Moreover, the shape of the connection part 164 is not limited to this embodiment, if the space | interval of the ring 162 changes. In addition, the connection part 164 functions like a spring by providing the connection part 164 with a curved string shape as in this embodiment, and can give a certain degree of freedom to the ring 162 in the plane direction. . Moreover, in this embodiment, although the pressing sheet metal 170 shall have a circular hole, it is not restricted to this. It is only necessary to have a hole through which the laser beam emitted from the LD 120 can pass through the ring 162 in contact with the ring 162.

  If the lens presser 160 is a sheet metal 960 having a hole 962 corresponding to the position of the collimator lens 150 as shown in FIG. 7, the following difference from the present embodiment occurs. When a plurality of collimator lenses 150 are pressed and fixed by the sheet metal 960, the pitch of the individual collimator lenses 150, that is, the pitch of the through holes of the second fixing member 140 and the pitch of the holes 962 of the sheet metal 960 are completely matched. It is difficult to make it. Therefore, for any one of the plurality of collimator lenses 150, the optical axis defined by the second fixing member 140 and the center of the hole 962 of the sheet metal 960 may be shifted. At this time, the sheet metal 960 cannot uniformly press the entire circumference of the collimator lens 150. As a result, the collimator lens 150 may be broken or the optical axis of the collimator lens 150 may be shifted. On the other hand, in the lens pressing tool 160 of the present embodiment, the ring 162 slightly moves in the plane direction, so that the entire circumference of the collimator lens 150 can be pressed with an equal force.

  Further, according to the lens pressing tool 160 in the present embodiment, each ring 162 of the lens pressing tool 160 is connected and integrated with each other as compared with the case where the ring 162 is not connected by the connecting part 164. Therefore, all the rings 162 can be installed on each collimator lens 150 at a time.

  Thus, for example, the through hole 142 functions as a plurality of holes for accommodating a plurality of lenses and positioning the plurality of lenses in a plane, and for example, the step 144 is connected to the optical axis in each of the plurality of holes. The second fixing member functions as a plurality of first contact portions that suppress the movement of the plurality of lenses in the parallel first direction. For example, the second fixing member has a plurality of holes and a plurality of first contact portions. Function as. For example, the ring 162 has a first hole formed smaller than the size of each of the plurality of lenses through which light passing through the plurality of lenses passes, and a plurality of rings 162 are provided corresponding to the arrangement positions of the plurality of lenses. For example, the connecting part 164 functions as a connecting part that movably connects the second contact parts to each other. For example, the lens presser 160 has a plurality of second contact parts. And a lens pressing tool having a connecting portion. For example, the presser metal plate 170 has second holes respectively provided at positions where light passing through the plurality of lenses passes, and presses the lens presser against the plurality of lenses to thereby respectively hold the plurality of lenses to the first contact portions. It functions as a presser plate that is pressed against and fixed to.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the column of problems to be solved by the invention can be solved and the effect of the invention can be obtained. The configuration in which this component is deleted can also be extracted as an invention. Furthermore, constituent elements over different embodiments may be appropriately combined.

Hereinafter, the invention described in the scope of claims of the present application will be appended.
[1] A lens fixing mechanism for arranging and fixing a plurality of lenses side by side in a plane orthogonal to the optical axis,
A plurality of holes that respectively accommodate the plurality of lenses and position the plurality of lenses in the plane; and the plurality of lenses in a first direction parallel to the optical axis in each of the plurality of holes. A fixing member having a plurality of first contact portions that suppress movement of
A plurality of first holes each having a first hole formed smaller than the size of each of the plurality of lenses through which light passing through the plurality of lenses passes; A lens pressing tool having two contact portions and a connecting portion that movably connects the plurality of second contact portions to each other;
A second hole provided at each of the positions where light passing through the plurality of lenses passes, and pressing the lens pressing member against the plurality of lenses, thereby causing the plurality of lenses to respectively contact the first contact portion; A holding plate to hold down and fix,
A lens fixing mechanism.
[2] The lens fixing mechanism according to [1], wherein the second contact portion has an annular shape having an inner diameter smaller than an outer diameter of the lens corresponding to each of the plurality of lenses. .
[3] The lens fixing mechanism according to [1] or [2], wherein the connecting portion has a curved string shape.
[4] The lens fixing mechanism according to any one of [1] to [3], wherein the second contact portion and the connecting portion are integrally formed.
[5] The lens fixing mechanism according to any one of [1] to [4], wherein the second hole is larger than the first hole and smaller than the second contact portion. .
[6] A plurality of light sources arranged on a plane;
Multiple lenses,
The lens fixing mechanism according to any one of [1] to [5], which fixes the plurality of lenses on an optical axis of light emitted from each of the light sources;
A holding member that holds the plurality of light sources and the lens fixing mechanism;
A light source device comprising:
[7] The light source device according to [6] is provided,
Projecting a projection image formed using light emitted from the light source device onto a projection target;
A projector characterized by that.

  DESCRIPTION OF SYMBOLS 10 ... Projector, 11 ... Input part, 12 ... Image conversion part, 13 ... Projection process part, 14 ... Micromirror element, 15 ... Light source part, 16 ... Mirror, 17 ... Projection lens part, 18 ... CPU, 19 ... Main memory , 20 ... Program memory, 21 ... Operation unit, 22 ... Audio processing unit, 23 ... Speaker, 32, 46, 51, 53 ... Mirror, 33, 34, 36, 37, 41, 43, 45, 47, 48, 50 , 52, 54, 56, 57 ... lens, 35 ... first dichroic mirror, 38 ... fluorescent wheel, 39 ... motor, 42 ... second dichroic mirror, 44 ... integrator, 55 ... light emitting diode (LED), 100 ... Laser light source unit, 110 ... heat sink, 112 ... radiation fin, 120 ... semiconductor laser (LD), 130 ... first fixing member, 140 ... second Fixing member, 142 ... through hole, 144 ... stepped, 150 ... collimator lens, 160 ... lens retainer, 162 ... ring, 164 ... connection section, 170 ... holding sheet metal, 180 ... screw.

Claims (6)

A lens fixing mechanism for arranging and fixing a plurality of lenses side by side in a plane perpendicular to the optical axis,
A plurality of holes that respectively accommodate the plurality of lenses and position the plurality of lenses in the plane; and the plurality of lenses in a first direction parallel to the optical axis in each of the plurality of holes. A fixing member having a plurality of first contact portions that suppress movement of
A plurality of first holes each having a first hole formed smaller than the size of each of the plurality of lenses through which light passing through the plurality of lenses passes; A lens pressing tool having two contact portions and a connecting portion that movably connects the plurality of second contact portions to each other;
A second hole provided at each of the positions where light passing through the plurality of lenses passes, and pressing the lens pressing member against the plurality of lenses, thereby causing the plurality of lenses to respectively contact the first contact portion; A holding plate to hold down and fix,
Equipped with,
The lens fixing mechanism, wherein the second hole is larger than the first hole and smaller than the second contact portion .   2. The lens fixing mechanism according to claim 1, wherein the second contact portion has an annular shape having an inner diameter smaller than an outer diameter of the lens corresponding to each of the plurality of lenses.   The lens fixing mechanism according to claim 1, wherein the connecting portion has a curved string shape. 4. The lens fixing mechanism according to claim 1, wherein the second contact portion and the connecting portion are integrally formed. 5. A plurality of light sources arranged on a plane;
Multiple lenses,
The lens fixing mechanism according to any one of claims 1 to 4 , wherein the plurality of lenses are fixed on an optical axis of light emitted from each of the light sources.
A holding member that holds the plurality of light sources and the lens fixing mechanism;
A light source device comprising: Comprising the light source device according to claim 5 ;
Projecting a projection image formed using light emitted from the light source device onto a projection target;
A projector characterized by that.

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