JP2022045957A - Holding member, light source device, projection device, and method for holding optical member - Google Patents

Abstract

To provide a holding member that precisely determines the position of an optical member, a light source device, a projection device, and a method for holding an optical member .SOLUTION: An optical member 4 includes: a first contact target part 41 provided near a first reference surface; a second contact target part 472 provided near a second reference surface, perpendicular to the first reference surface; and a third contact target part 474 provided near a third reference surface, perpendicular to the first and second reference surfaces. The holding member 5 includes: a first contact part 531 for determining the position of the first contact target part 41 in a first axial direction; a second contact part for determining the position of the second contact target part 472 in a second axial direction, perpendicular to the first axial direction; and a third contact part 522a for determining the position of the third contact target part 474 in a third axial direction, perpendicular to the first and second axial directions.SELECTED DRAWING: Figure 4

Description

The present invention relates to a holding member, a light source device, a projection device provided with the light source device, and a method for holding an optical member.

Conventionally, a projection device called a DMD (Digital Micromirror Device) that projects an image formed by using a micromirror display element or a liquid crystal plate onto a screen has been proposed. An optical member such as a condenser lens is fixedly arranged on the projection device by a holding member. As an example of a method for holding a condenser lens, Patent Document 1 discloses a holding structure of a cylindrical lens including a positioning member for positioning the cylindrical lens and a holding member for pressing and holding the cylindrical lens. The opening formed in the holding member is engaged with the claw portion provided in the positioning member, and the cylindrical lens is pressed and held.

Japanese Unexamined Patent Publication No. 2004-157344

Depending on the configuration of the optical member, high-precision positioning is required in the three-axis direction and the rotation direction around each axis in the three-dimensional coordinate system. In the holding mechanism of Patent Document 1, the front surface portion of the cylindrical lens is supported in the optical axis direction by two pressure pieces that are a part of the sheet metal. Therefore, it is assumed that the cylindrical lens moves in the vertical or horizontal direction perpendicular to the optical axis, and the central axis of the cylindrical lens and the optical axis deviate from each other. Therefore, it may be difficult to hold an optical member having a complicated shape by the holding method of Patent Document 1.

In view of the above points, it is an object of the present invention to provide a holding member, a light source device, a projection device, and a holding method for the optical member for positioning the optical member with high accuracy.

The holding member of the present invention is a holding member that holds an optical member, and the optical member intersects a first contacted portion provided on the first reference plane side with the first reference plane. The second contacted portion provided on the reference plane side and the third contacted portion provided on the third reference plane side intersecting the first reference plane and the second reference plane are provided. The first contact portion that positions the first axial position of the first contacted portion and the second contact portion that positions the second axial position of the second contacted portion that intersects the first axial direction. It is characterized by including a portion and a third contact portion for positioning the position in the third axial direction intersecting the first axial direction and the second axial direction of the third contacted portion.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a holding member, a light source device, a projection device, and a holding method of an optical member for positioning an optical member with high accuracy.

It is a figure which shows the functional circuit block of the projection apparatus which concerns on embodiment of this invention. It is a plane schematic diagram which shows the internal structure of the projection apparatus which concerns on embodiment of this invention. It is a schematic diagram which looked at the fluorescent wheel which concerns on embodiment of this invention from the front. It is a perspective view of the state in which the optical member is held by the holding member which concerns on embodiment of this invention. It is a figure which shows the optical member which concerns on embodiment of this invention, (a) is a perspective view, (b) is a front view seen from the first lens surface side. It is a figure which shows the optical member which concerns on embodiment of this invention, (a) is the side view seen from the 2nd lens surface side, (b) is the back view seen from the extension part side formed below. Is. It is a perspective view of the holding member which concerns on embodiment of this invention. It is a perspective view of the fixing member which concerns on embodiment of this invention. It is a side view which shows the state which the optical member is positioned | positioned with respect to the holding member which concerns on embodiment of this invention. It is a rear view which shows the state which the optical member is positioned | positioned with respect to the holding member which concerns on embodiment of this invention. FIG. 10 is a sectional view taken along line XI-XI of the holding member shown in FIG. 10 according to the embodiment of the present invention, showing a state in which the optical member is fixed by the fixing member.

Hereinafter, embodiments for carrying out the present invention will be described. FIG. 1 is a functional circuit block diagram of the projection device 10. The projection device control unit includes a CPU including an image conversion unit 23 and a control unit 38, a front-end unit including an input / output interface 22, and a formatter unit including a display encoder 24 and a display drive unit 26. The image signals of various standards input from the input / output connector unit 21 are converted into an image signal of a predetermined format suitable for display by the image conversion unit 23 via the input / output interface 22 and the system bus SB. After that, it is output to the display encoder 24.

Further, the display encoder 24 expands and stores the input image signal in the video RAM 25, generates a video signal from the stored contents of the video RAM 25, and outputs the video signal to the display drive unit 26.

The display drive unit 26 drives the display element 27, which is a spatial light modulation element (SOM), at an appropriate frame rate corresponding to the image signal output from the display encoder 24. The projection device 10 irradiates the display element 27 with a bundle of light rays emitted from the light source device 60 via the light guide optical system to form an optical image with the reflected light of the display element 27, and the projection optical system 220 ( The image is projected and displayed on a projected object such as a screen (not shown) via (see FIG. 2). The movable lens group 235 of the projection optical system 220 can be driven by the lens motor 29 for zoom adjustment and focus adjustment.

Further, the image compression / decompression unit 31 performs a recording process of compressing the luminance signal and the color difference signal of the image signal by processing such as ADCT and Huffman coding and sequentially writing them to the memory card 32 which is a detachable recording medium. Further, the image compression / decompression unit 31 reads out the image data recorded in the memory card 32 in the reproduction mode, decompresses the individual image data constituting the series of moving images in units of one frame, and decompresses the individual image data in units of one frame, via the image conversion unit 23. Output to the display encoder 24. Therefore, the image compression / decompression unit 31 can output a moving image or the like based on the image data stored in the memory card 32.

The control unit 38 controls the operation of each circuit in the projection device 10, and is composed of a ROM that fixedly stores operation programs such as a CPU and various settings, and a RAM that is used as a work memory. ..

The key / indicator unit 37 is composed of a main key, an indicator, and the like provided in the housing. The operation signal of the key / indicator unit 37 is sent directly to the control unit 38. Further, the key operation signal from the remote controller is received by the Ir receiving unit 35, demodulated into a code signal by the Ir processing unit 36, and output to the control unit 38.

The control unit 38 is connected to the voice processing unit 34 via the system bus SB. The voice processing unit 34 includes a sound source circuit such as a PCM sound source, converts voice data into analog in the projection mode and the reproduction mode, and drives the speaker 39 to emit loud sound.

The control unit 38 controls the light source control circuit 28. The light source control circuit 28 individually controls the operation of the excitation light irradiation device of the light source device 60 so that light in a predetermined wavelength band required at the time of image generation is emitted from the light source device 60.

Further, the control unit 38 causes the cooling fan drive control circuit 33 to detect the temperature by a plurality of temperature sensors provided in the light source device 60 and the like, and from the result of this temperature detection, the rotation speed of the cooling fan (not shown) in the projection device 10. To control. The control unit 38 keeps the cooling fan rotating even after the power of the projection device 10 is turned off by a timer or the like in the cooling fan drive control circuit 33, or turns off the power of the projection device 10 based on the result of temperature detection by the temperature sensor. It also controls such as setting.

FIG. 2 is a schematic plan view showing the internal structure of the projection device 10. The projection device 10 includes a light source device 60, a light source side optical system 170, a projection optical system 220, and the like. Further, the projection device 10 is a drive unit (excitation light irradiation device 70, red light source device 120, fluorescence wheel device 100, display) in a light source device 60 connected to a circuit board including an internal power supply circuit block, a light source control block, and the like. (Including the element 27 and the like) is driven.

The light source device 60 includes an excitation light irradiation device 70 which is a light source of blue wavelength band light (light L1) and is also an excitation light source, a green light source device 80 which is a light source of green wavelength band light, and a light source of red wavelength band light. It is provided with a certain red light source device 120. The green light source device 80 includes an excitation light irradiation device 70 and a fluorescence wheel device 100.

The light source device 60 is provided with a light guide optical system 140 and a light source side optical system 170 that guide light in each color wavelength band. The light guide optical system 140 guides the light emitted from the excitation light irradiation device 70, the green light source device 80, and the red light source device 120 to the light source side optical system 170.

The excitation light irradiation device 70 is arranged on the back panel 13 side of the projection device 10. The excitation light irradiation device 70 includes a light source group including a plurality of blue laser diodes 71. The blue laser diode 71 is a semiconductor light emitting device, and is arranged so that the red light emitting diode 121 and the optical axis of the emitted light are parallel to each other.

The above-mentioned light source group is configured by arranging a plurality of blue laser diodes 71 in a matrix. In the present embodiment, when the light source group of the blue laser diode 71 is viewed from the left panel 15 side of FIG. 2, the blue laser diode 71 is arranged in a matrix of 2 rows and 5 columns (details are not shown). Further, on the optical axis of each blue laser diode 71, a collimator lens 73 that converts light into parallel light is arranged so as to enhance the directivity of the light emitted from the blue laser diode 71. A reflection mirror group 75 is arranged on the optical axis of each collimator lens 73. The reflection mirror group 75 converts the optical axis of the blue wavelength band light emitted from each blue laser diode 71 by 90 degrees in the direction of the front panel 12. The heat sink 81 is arranged between the blue laser diode 71 and the right panel 14. Further, a cooling fan 261 is arranged between the heat sink 81 and the back panel 13. The blue laser diode 71 is cooled by the cooling fan 261 and the heat sink 81.

The fluorescent wheel device 100 constituting the green light source device 80 is arranged on the optical path of the excitation light emitted from the excitation light irradiation device 70 and in the vicinity of the front panel 12. The fluorescent wheel device 100 includes a fluorescent wheel 101, a motor 110, a condenser lens group 111, and an optical member 4. The fluorescence wheel 101 is arranged so as to be orthogonal to the optical axis of the light emitted from the excitation light irradiation device 70. The motor 110 rotates and drives the fluorescent wheel 101. The condensing lens group 111 condenses the light bundle of the excitation light emitted from the excitation light irradiation device 70 on the fluorescent wheel 101, and also condenses the light bundle emitted from the fluorescent wheel 101 in the direction of the rear panel 13. The optical member 4 collects a bundle of light rays emitted from the fluorescent wheel 101 and reflects it toward the condenser lens 146. A cooling fan 261 is arranged between the motor 110 and the front panel 12, and the cooling fan 261 cools the fluorescent wheel device 100 and the like.

FIG. 3 is a schematic view of the fluorescent wheel 101 as viewed from the front. The fluorescent wheel 101 is formed in a disk or an annular shape, and the opening 112 side is connected to the shaft portion of the motor 110 and is rotatably formed. On the fluorescent wheel 101, a C-annular fluorescent light emitting region 310 and an arc-shaped transmission region 320 are arranged side by side in the circumferential direction. The fluorescence emission region 310 receives the blue wavelength band light emitted from the excitation light irradiation device 70 and condensed by the condenser lens group 111 as the excitation light, and emits the fluorescent light of the green wavelength band light. The transmission region 320 transmits or diffuses the blue wavelength band light emitted from the excitation light irradiation device 70.

The base material 102 of the fluorescent wheel 101 is formed in a disk shape by a metal formed of copper, aluminum, or the like. The surface 102a of the base material 102 on the side of the excitation light irradiation device 70 is mirror-processed by silver vapor deposition or the like. A green phosphor layer is laid on the mirrored surface 102a to form a fluorescence emission region 310. The transmission region 320 is formed by inserting a transparent base material having transparency into an arc-shaped cut-out through hole portion formed in the base material 102. When the transmission region 320 is a region that diffuses and transmits the excitation light, fine irregularities are formed on the surface of the transparent substrate by sandblasting or the like.

When the blue wavelength band light emitted from the excitation light irradiation device 70 irradiates the fluorescence emission region 310 (see, for example, the irradiation region S in FIG. 3), the green phosphor in the green phosphor layer is excited, and the fluorescence emission region 310 Emits green wavelength band light as fluorescent light in all directions. The green wavelength band light is emitted to the back panel 13 side and incident on the condenser lens group 111. On the other hand, the blue wavelength band light incident on the transmission region 320 is transmitted or diffused and transmitted through the fluorescence wheel 101, and is incident on the optical member 4 arranged on the back surface side (in other words, the front panel 12 side) of the fluorescence wheel 101. ..

The condensing lens group 111 shown in FIG. 2 condenses the light bundle of the blue wavelength band light emitted from the excitation light irradiation device 70 on the fluorescence wheel 101 and also condenses the fluorescence emitted from the fluorescence wheel 101. The optical member 4 collects the blue wavelength band light (light L1) emitted through the fluorescent wheel 101 and emits it to the condenser lens 146 side.

The red light source device 120 collects the red light emitting diode 121, which is a semiconductor light emitting element arranged so that the blue laser diode 71 and the optical axis of the emitted light are parallel to each other, and the red wavelength band light emitted from the red light emitting diode 121. It includes a light condensing lens group 125 and. In the red light source device 120, the optical axis of the red wavelength band light emitted from the red light emitting diode 121 intersects with the optical axis of the green wavelength band light emitted from the fluorescence wheel 101 and reflected by the first dichroic mirror 141. Is placed in. The red light source device 120 is cooled by a heat sink 130 provided on the right side panel 14 side, a cooling fan 261 and the like.

The light guide optical system 140 includes a first dichroic mirror 141, a second dichroic mirror 148, a reflection mirror 145, and a plurality of condensing lenses 146, 147, and 149 for condensing a light bundle.

In the first dichroic mirror 141, the blue wavelength band light emitted from the excitation light irradiation device 70 and the green wavelength band light emitted from the fluorescence wheel 101 intersect with the red wavelength band light emitted from the red light source device 120. Placed in position. The first dichroic mirror 141 transmits blue and red wavelength band light and reflects green wavelength band light. The optical axis of the green wavelength band light emitted from the fluorescent wheel 101 is converted by 90 degrees in the direction of the left panel 15.

The optical member 4 collects the blue wavelength band light (light L1) incident on the incident surface (first lens surface 42), reflects it on the reflecting surface 45, and then emits blue wavelength from the emitting surface (second lens surface 43). The band light is focused and emitted to the condenser lens 146 side (see also FIGS. 5 and 6). The condenser lens 146 is arranged on the left side panel 15 side of the optical member 4. The reflection mirror 145 is arranged on the left side panel 15 side of the condenser lens 146. The reflection mirror 145 converts the optical axis of the blue wavelength band light focused by the condenser lens 146 to the back panel 13 side by 90 degrees. The condenser lens 147 is arranged on the back panel 13 side of the reflection mirror 145.

Further, the condenser lens 149 is arranged on the left side panel 15 side of the first dichroic mirror 141. The optical axis of the red wavelength band light transmitted through the first dichroic mirror 141 is incident on the condenser lens 149. Further, the optical axis of the green wavelength band light reflected by the first dichroic mirror 141 substantially coincides with the optical axis of the red wavelength band light and is incident on the condenser lens 149.

The second dichroic mirror 148 is arranged on the left side panel 15 side of the condenser lens 149 and on the back panel 13 side of the condenser lens 147. The second dichroic mirror 148 reflects the red wavelength band light and the green wavelength band light and transmits the blue wavelength band light. Therefore, the red wavelength band light and the green wavelength band light focused by the condenser lens 149 are reflected by the second dichroic mirror 148 and incident on the condenser lens 173 of the light source side optical system 170. On the other hand, the blue wavelength band light transmitted through the condenser lens 147 passes through the second dichroic mirror 148 and passes through the condenser lens 173 to the incident port of the light guide device 175 such as a light tunnel, a glass rod, and a microlens array. Is focused on.

The light source side optical system 170 includes a condenser lens 173, a light guide device 175, a condenser lens 178, an optical axis conversion mirror 181 and a condenser lens 183, an irradiation mirror 185, and a condenser lens 195. The condenser lens 195 is included in a part of the projection optical system 220 because the image light emitted from the display element 27 arranged on the rear panel 13 side of the condenser lens 195 is emitted toward the projection optical system 220. ..

The condenser lens 173 arranged in the vicinity of the light guide device 175 collects the light source light to the incident port of the light guide device 175. The red wavelength band light, the green wavelength band light, and the blue wavelength band light are condensed by the condenser lens 173 and incident on the light guide device 175. The light beam incident on the light guide device 175 becomes a light beam bundle having a uniform intensity distribution by the light guide device 175.

A condenser lens 178 and an optical axis conversion mirror 181 are arranged on the optical axis on the rear panel 13 side of the light guide device 175. The optical axis of the light beam emitted from the exit port of the light guide device 175 is focused by the condenser lens 178, and then the optical axis is converted to the left panel 15 side by the optical axis conversion mirror 181.

The light beam bundle reflected by the optical axis conversion mirror 181 is focused by the condenser lens 183, and then is irradiated to the display element 27 by the irradiation mirror 185 via the condenser lens 195 at a predetermined angle. The display element 27 of this embodiment is a DMD (digital micromirror device) including a plurality of micromirror lenses. A heat sink 190 is provided on the back panel 13 side of the display element 27, and the display element 27 is cooled by the heat sink 190.

The light source light applied to the image forming surface of the display element 27 by the light source side optical system 170 is reflected by the image forming surface of the display element 27 and projected onto the screen as image light via the projection optical system 220. Here, the projection optical system 220 is composed of a condenser lens 195, a movable lens group 235 and a fixed lens group 225 provided in the lens barrel. The lens barrel is a varifocal lens, and is formed so that zoom adjustment and focus adjustment are possible. The movable lens group 235 is formed so as to be automatically or manually adjustable by the lens motor 29.

By configuring the projection device 10 in this way, when the fluorescent wheel 101 is rotated synchronously and light is emitted from the excitation light irradiation device 70 and the red light source device 120 at appropriate timings, the green, blue, and red wavelength bands are recorded. Light is incident on the condenser lens 173 via the light guide optical system 140 and incident on the display element 27 via the light source side optical system 170. Therefore, the display element 27 can project a color image on the screen by displaying the light of each color in a time-division manner according to the data.

FIG. 4 is a diagram showing a holding member 5 that holds the optical member 4. The holding member 5 holds the condenser lens group 111 and the condenser lens 146 shown in FIG. 2, and also holds the optical member 4. Further, the fluorescent wheel 101 is arranged in the accommodating portion 57, which is a space provided between the condenser lens group 111 and the optical member 4. In FIG. 4, the condenser lens group 111 and the condenser lens 146 are not shown.

The optical member 4 is incident with light L1 (blue wavelength band light emitted from the excitation light irradiation device 70) transmitted through the transmission region 320 of the fluorescence wheel 101, reflected by the reflection surface 45, and then reflected on the condenser lens 146 side. It emits to. Further, the optical member 4 is a so-called irregular lens having a spherical first lens surface 42 which is a convex lens and a cylindrical second lens surface 43 on each of the incident side and the emitted side of the light L1, and each first lens. The light L1 can be focused on the surface 42 and the second lens surface 43.

As shown in FIGS. 5 and 6, the optical member 4 is first applied to the first reference plane S1 side parallel to the ZX plane in a Cartesian coordinate system including the X-axis, Y-axis, and Z-axis that are orthogonal to each other. It has a contact portion 41 and a first lens surface 42. The first contacted portion 41 and the first lens surface 42 are juxtaposed with each other, and the first lens surface 42 is formed in the effective region A1 in which the optical path in which the light L1 is incident is located. 5 (b) is shown by hatching). The first contacted portion 41 is provided outside the effective region A1. The first contacted portion 41 comes into contact with the first contacted portion 531 of the holding member 5, which will be described later, and is used for positioning the optical member 4. The first contacted portion 41 is formed in a flat shape. Further, the first lens surface 42 is formed as a convex lens that protrudes spherically from the first contacted portion 41. Therefore, the light L1 irradiated on the first lens surface 42 is focused on the components in the X-axis direction and the Z-axis direction and is incident on the inside of the optical member 4.

Further, the optical member 4 has a curved second lens surface 43 on the second reference surface S2 side parallel to the YZ plane (in other words, on the surface side vertically intersecting with the first reference surface S1). Have. The second lens surface 43 is a cylindrical lens having a convex cylindrical surface curved around a cylindrical central axis Y2 (see FIG. 10) parallel to the Y axis (in other words, parallel to the central axis Y1 of the first lens surface 42). Formed as. This cylindrical surface is formed perpendicular to the ZX plane. Therefore, the light L1 emitted from the second lens surface 43 is focused on the components in the Z-axis direction. As shown in FIG. 6A, an effective region A2 in which the optical path from which the light L1 is emitted is located is formed inside the second lens surface 43 in the height direction (Z-axis direction) (approximately the position). Is indicated by hatching).

The optical member 4 has a flat portion 44 parallel to the second reference surface S2 and at a position opposite to the second lens surface 43. The flat portion 44 is formed in a flat surface shape parallel to the YZ plane. The flat portion 44 is provided on the first lens surface 42 side in the Y-axis direction, and is formed in an area smaller than that of the cylindrical second lens surface 43.

Further, as shown in FIG. 6B, the optical member 4 has a reflective surface 45 inclined with respect to the first reference surface S1 and the second reference surface S2 on the back surface side opposite to the first lens surface 42. Has. The reflection surface 45 is formed perpendicular to the XY plane (or the third reference surface S3 described later). The reflective surface 45 is formed in a slightly convex curved shape (in other words, a concave curved shape with respect to the inside of the optical member 4 irradiated with the light L1) by applying a reflective coat to the outer surface of the optical member 4. .. The reflecting surface 45 reflects the light L1 incident from the first lens surface 42 inside the optical member 4 and guides the light L1 to the second lens surface 43 side. The light L1 reflected by the reflecting surface 45 is focused on the components in the Y-axis direction.

An upper surface portion 46 and an extension portion 47 are formed on the upper end side and the lower end side of the optical member 4 in the Z-axis direction, respectively. The upper surface portion 46 is formed as a flat surface parallel to the XY plane. Further, the extending portion 47 projects downward (Z-axis negative direction) from the lens main body portion 40 on which the first lens surface 42 and the second lens surface 43 are formed, and extends outside the effective regions A1 and A2 of the optical path. The lens. The extension portion 47 of the present embodiment is formed in a short triangular columnar shape. The extending portion 47 has a side surface 471 on the first lens surface 42 side, a second contacted portion 472 on the side surface on the second lens surface 43 side, and a side surface 473 on the reflection surface 45 side. The side surfaces 471 and 473 and the second contacted portion 472 are formed in a flat surface shape. The second contacted portion 472 is formed in parallel with the second reference surface S2.

In the bottom view of FIG. 6B, the side surface 471 is provided inside the first contacted portion 41 and the first lens surface 42. The second contacted portion 472 is provided inside the top portion 431 that intersects the central axis X1 of the second lens surface 43. Further, the side surface 473 is provided inside the reflecting surface 45. Therefore, the optical member 4 is formed with a stepped portion 475 around the outer circumferences of the side surfaces 471 and 473 of the extended portion 47 and the second contacted portion 472 side. Further, the second contacted portion 472 is formed on the second reference surface S2 side like the second lens surface 43.

The extension portion 47 is a third cover at an end portion on a third reference plane S3 parallel to the XY plane (in other words, on a plane that intersects vertically different from the first reference plane S1 and the second reference plane S2). It has a contact portion 474. The third contacted portion 474 is formed in a substantially triangular flat surface shape. The third contacted portion 474 may be formed by projecting a part of the end portion of the extended portion 47.

The holding member 5 shown in FIG. 7 has a lens holding portion 51 for holding the condenser lens group 111 shown in FIG. 2, and a lens holding portion 52 for holding the optical member 4 and the condenser lens 146. The lens holding portion 51 arranges each condensing lens constituting the condensing lens group 111 so that the optical axis is parallel to the Y-axis direction. Further, the lens holding portion 51 has an opening portion 511 that allows the light L1 emitted from the condenser lens group 111 to be transmitted to the lens holding portion 52 side. A fixing portion 55 capable of fixing the holding member 5 to the inner case (not shown) of the light source device 60 is formed on the upper portion of the lens holding portion 51 and the lens holding portion 52. It should be noted that the illustration of the screw hole or the like formed in the fixing portion 55 is omitted. Further, an accommodating portion 57, which is a space in which a part of the fluorescent wheel 101 shown in FIG. 2 is arranged, is provided between the lens holding portion 51 and the lens holding portion 52.

The lens holding portion 52 has a first positioning portion 53 formed in a plate shape substantially parallel to the ZX plane and a second positioning portion connected to the first positioning portion 53 and formed in a plate shape substantially parallel to the YZ plane. It is equipped with 54. The upper portion and the lower portion of the first positioning portion 53 and the second positioning portion 54 are connected by a triangular plate-shaped upper side wall 521 and a lower side wall 522, respectively. The upper side wall 521 and the lower side wall 522 are formed parallel to the XY plane. Therefore, the lens holding portion 52 is formed with a lens accommodating portion 520 in which the X-axis positive direction side and the Y-axis positive direction side are open.

A flat outer peripheral portion 520a on which the fixing member 6 is placed is formed around the outer peripheral edge of the opening edge of the lens accommodating portion 520. The outer peripheral portion 520a is substantially perpendicular to the XY plane and is inclined with respect to the YZ plane and the ZX plane. Female screw portions 591 and 592 are formed on the outer peripheral portion 520a above and below the lens accommodating portion 520.

The first positioning portion 53 has a first contact portion 531 which is a flat surface parallel to the ZX plane. A first optical path portion 532, which is a U-shaped notch, is formed in a part of the first positioning portion 53. The first optical path portion 532 is opened with a size such that the light L1 emitted from the condenser lens group 111 side can be transmitted. The first optical path portion 532 is not limited to a configuration in which a part of the first positioning portion 53 is cut out, and may be formed as a through hole penetrating in a circular shape or the like.

The second positioning portion 54 is formed with an inner surface 541 that is a cylindrical surface-like curved surface that is perpendicular to the ZX plane and is recessed on the negative direction side of the X axis. The inner surface 541 is formed so as to be substantially parallel to the second lens surface 43 formed in a cylindrical surface shape when the optical member 4 is housed in the second positioning portion 54. Further, the second positioning portion 54 is formed with a second contact portion 542 which is continuously provided on the lower side (Z-axis negative direction) side from the inner surface 541. The second contact portion 542 is formed in a flat surface shape parallel to the YZ plane.

Further, in the lens accommodating portion 520, a third contact portion 522a connected from the lower ends of the first contact portion 531 and the second contact portion 542 is formed. The third contact portion 522a corresponds to the inner surface of the lower side wall 522, which is the third positioning portion. The third contact portion 522a is a triangular flat surface formed so as to be perpendicular to the first contact portion 531 and the second contact portion 542.

Further, a second optical path portion 543, which is a through hole penetrating in the X-axis direction, is formed on the inner surface 541. The second optical path portion 543 can transmit the light of the effective region A2 on the second reference surface S2 of the optical member 4. The second optical path portion 543 is not limited to the shape of a through hole and may be provided as a notch portion. Further, a lens holding portion 58 for holding the condenser lens 146 shown in FIG. 2 is provided on the surface of the second positioning portion 54 opposite to the inner surface 541.

The fixing member 6 shown in FIG. 8 is formed of a metal plate material. The fixing member 6 is formed in a substantially rectangular plate shape, and a rectangular notch 61 formed inside in the long direction on one side of the long edge 6a and the notch 61 are formed. It has a rectangular notch 62 formed at a corner with a short edge 6b connected to the edge 6a. A rectangular plate-shaped pressing portion 611 (second pressing portion) extends from the bottom portion 61a side of the notch portion 61. The pressing portion 611 is inclined toward one side of the fixing member 6 and is formed in the shape of a cantilevered leaf spring formed with a width shorter than that of the notch portion 61. The tip of the pressing portion 611 is folded upward in FIG. 8, and a convex contact portion 612 is formed on the mountain side of the folded portion.

Further, in the cutout portion 62, a rectangular plate-shaped pressing portion 621 (first pressing portion) extends from the bottom portion 62a side parallel to the short edge 6b. The pressing portion 621 is on one side of the fixing member 6 and is bent in the same direction as the pressing portion 611, and extends substantially perpendicular to the plate surface of the fixing member 6. The pressing portion 621 is also formed in the shape of a cantilever leaf spring. Further, the tip portion of the pressing portion 621 is folded back on the side opposite to the bending direction on the bottom portion 62a side, and a convex contact portion 622 is formed on the mountain side of the folded portion. The contact portion 612 and the contact portion 622 are formed in a linear ridge line extending in a direction perpendicular to each other.

Further, the fixing member 6 has screw holes 63 and 64, which are round hole-shaped through holes. The screw holes 63 and 64 are provided at substantially diagonal positions of the fixing member 6 separated in the long direction. The fixing member 6 has optics positioned in the first positioning portion 53 and the second positioning portion 54 by fastening the screws 65 inserted through the screw holes 63 and 64 to the female screw portions 591 and 592, respectively. While pressing and fixing the member 4, it is fixed to the holding member 5.

Next, a method of positioning the optical member 4 will be described mainly with reference to FIGS. 9 to 11. The optical member 4 of the present embodiment is arranged so that the optical axis of the light L1 from the fluorescent wheel 101 (or the condenser lens group 111) side is located on the central axis Y1 of the first lens surface 42 which is a spherical convex lens. Will be done. Further, the central axes of the condenser lens group 111 and the condenser lens 146 are arranged so as to be parallel to the XY plane and perpendicular to each other. Therefore, the optical member 4 is arranged so that the optical axis of the light L1 incident from the first lens surface 42 is converted by the reflection surface 45 by 90 degrees in parallel with the XY plane and emitted from the second lens surface 43. The central axis X1 of the second lens surface 43 is arranged so as to coincide with the central axis of the condenser lens 146.

Therefore, when the optical member 4 is held by the holding member 5, (1) height direction position (Z-axis direction position), (2) left-right direction position (X-axis direction position), and (3) front-back direction position (3) Y-axis direction position), (4) Front angle position (Y-axis angle θy position), (5) Tilt angle (X-axis angle θx position), and (6) Horizontal angle (Z-axis angle θz) High positioning accuracy is required for the 6 degrees of freedom of position).

As shown in FIG. 9, in the positioning of the optical member 4, the first contacted portion 41 of the optical member 4 is first brought into contact with the first contacted portion 531. Since the first contacted portion 41 and the first contacted portion 531 are each formed in a flat shape, they are in surface contact with each other. Therefore, the first contacted portion 41 is positioned in the Y-axis direction (first axial position) in parallel with the ZX plane. As a result, the optical member 4 is positioned in the Y-axis direction (the above-mentioned (3) front-back direction position), and the angle θx position around the X-axis and the angle θz position around the Z-axis (the above-mentioned (5) tilt angle). And (6) horizontal angle) are positioned. The first lens surface 42, which is a convex lens, is arranged in the first optical path portion 532.

Next, as shown in FIG. 10, the second contacted portion 472 is brought into contact with the second contacted portion 542. Since the second contacted portion 472 and the second contacted portion 542 are each formed in a flat shape, they are in surface contact with each other. As a result, the optical member 4 is positioned at the X-axis direction position (second axis direction position) (the above-mentioned (2) left-right direction position), and the angle θy position around the Y-axis (the above-mentioned (4) front angle). Is positioned. Since the second contact portion 542 is formed parallel to the YZ plane, the second contact portion 542 is also positioned at an angle θz position around the Z axis (the above-mentioned (6) horizontal angle). Further, FIG. 10 shows that the second lens surface 43 and the inner surface 541 are separated from each other. For example, the second lens surface 43 is on the upper side (Z axis) opposite to the extending portion 47. It may be configured to be in contact with the inner surface 541 (or the convex portion provided on the inner surface 541) on the positive direction side). As a result, rotation of the angle θy around the Y axis can be prevented, and the positioning of the second contacted portion 472 and the second contacted portion 542 can be stabilized.

Further, the third contacted portion 474 is brought into contact with the third contacted portion 522a. Since the third contacted portion 474 and the third contacted portion 522a are each formed in a flat shape, they are in surface contact with each other. As a result, the optical member 4 is positioned in the Z-axis direction (position in the third axis direction) (the above-mentioned (1) height direction position). Since the third contact portion 522a is formed parallel to the XY plane, the angle θx position around the X axis and the angle θy position around the Y axis (the above-mentioned (5) tilt angle and (4) front angle). Is also positioned.

When the optical member 4 is positioned in this way, the optical axis of the light L1 emitted from the condenser lens group 111 (or the fluorescent wheel 101) is substantially aligned with the central axis Y1 of the first lens surface 42. The optical axis of the light L1 (central axis X1) emitted from the second lens surface 43 can be substantially aligned with the optical axis of the condenser lens 146.

Not limited to the order of the above description, the optical member 4 may have the first contact portion 41, the second contact portion 472, and the third contact portion 474 with respect to the first contact portion 531 and the first contact portion 474. (2) Positioning can be performed by contacting the contact portion 542 and the third contact portion 522a.

As shown in FIG. 11, the optical member 4 can be fixed by the fixing member 6 in a state of being positioned by the first positioning unit 53, the second positioning unit 54, and the lower side wall 522. In a state where the fixing member 6 is fixed to the holding member 5, the optical member 4 is urged toward the third contact portion 522a by the pressing portion 621. Further, the optical member 4 is held in a state of being urged toward the first contact portion 531 and the second contact portion 542 by the pressing portion 611 of the fixing member 6. Therefore, the optical member 4 can be stably arranged in the light source device 60 in a state of being positioned with high accuracy with respect to the above-mentioned 6 degrees of freedom. Since the optical member 4 is stably supported in this way, the position and orientation of the optical member 4 are maintained and the light is stabilized even if vibration is applied to the light source device 60 or the projection device 10 on which the light source device 60 is mounted. It is possible to guide the light.

Further, the optical member 4 includes a first lens surface 42, a second lens surface 43, and a reflection surface 45 for condensing light, and a reflection surface 45 for changing the direction of the optical axis, and one member has a plurality of functions. Have. Therefore, the number of parts can be reduced and the light source device 60 and the projection device 10 can be miniaturized.

Before the first contact portion 41 and the first contact portion 531 are brought into contact with each other, the adhesive G (see FIG. 11) is previously applied to one or both of the first contact portion 41 and the first contact portion 531. ) Can be applied. The adhesive G may be used as a temporary fixing that suppresses the rotation of the angle θy position around the Y axis when the adhesive G is fixed by the fixing member 6. Further, the optical member 4 may be fixed to the holding member 5 by using the adhesive G as the fixing member without using the fixing member 6.

Further, the adhesive G may be applied between the second contacted portion 472 and the second contacted portion 542, or between the third contacted portion 474 and the third contacted portion 522a. In this case, it adheres to one or both of the contacted portion (second contacted portion 472, third contacted portion 474) and the contacted portion (second contacted portion 542, third contacted portion 522a). Agent G can be applied.

Further, the optical member 4 and the holding member 5 may be fixed by the fixing member 6 without using the adhesive G. In this case, the process of applying the adhesive G can be simplified and the working time can be shortened. Further, the fixing member is not limited to the fixing member 6 and the adhesive G described in the present embodiment, and other means for fixing the optical member 4 may be applied.

Further, in the present embodiment, the configuration for positioning the optical member 4 in an orthogonal coordinate system in which the X-axis, the Y-axis, and the Z-axis are orthogonal to each other has been described, but the holding member 5 and the fixing member 6 are the X-axis, the Y-axis, and the fixing member 6. The optical member 4 may be positioned for 6 degrees of freedom in a coordinate system in which the Z axes intersect without being orthogonal to each other (for example, an oblique coordinate system in which all or a set of three axes intersects diagonally).

Further, in the description of the present embodiment, the first contact portion 531 is described as a flat surface, but for example, a concave portion or a plurality of convex portions may be provided in a part of the first contact portion 531. Even in this case, the portion of the first contact portion 531 that abuts on the first contact portion 41 of the optical member 4 is composed of a plurality of (for example, three or more points) protruding portions arranged in a flat shape. As a result, the first contact portion 531 of the optical member 4 can be easily positioned in the Y-axis direction while being parallel to the ZX plane. Similarly, the second contact portion 542 and the third contact portion 522a may be configured to be partially provided with a concave portion or a plurality of convex portions.

As described above, in the optical member 4 described in the embodiment of the present invention, the flat first contacted portion 41 formed on the first reference surface S1 side intersects the first reference surface S1. (Ii) A flat second contacted portion 472 formed on the reference surface S2 side and a flat third formed on the third reference surface S3 side intersecting the first reference surface S1 and the second reference surface S2. A contacted portion 474 is provided. In the holding member 5, the flat first contact portion 531 that positions the first contact portion 41 in parallel with the ZX plane and the second contact portion 472 are X in parallel with the YZ plane. A flat second contact portion 542 that positions the axial position, a flat third contact portion 522a that positions the third contact portion 474 in parallel with the XY plane, and an optical member. A fixing member 6 (adhesive G) for fixing the 4 is provided.

As a result, the optical member 4 has (1) a height direction position (Z-axis direction position), (2) a left-right direction position (X-axis direction position), and (3) a front-back direction position (Y) with respect to the holding member 5. Axial position), (4) Front angle position (angle θy position around Y axis), (5) Tilt angle (angle θx position around X axis), and (6) Horizontal angle (angle θz position around Z axis) ) Is stably fixed for 6 degrees of freedom. Further, since the contact portion 531,542,522a used for positioning and the contacted portion 41,472,474 are flattened, the inclination of the optical member 4 can be easily positioned, and the fixing member 6 can be easily positioned. (Or the adhesive G) can easily prevent misalignment when fixing. Therefore, the holding member 5 can easily and accurately position the optical member 4.

Further, the optical member 4 has a first lens surface 42 arranged in parallel with the first contacted portion 41 on the first reference surface S1 side, and a second lens surface 43 provided on the second reference surface S2 side. An extension portion 47 extending outside the effective regions A1 and A2 of the optical path of the first lens surface 42 and the second lens surface 43 to form a second contact portion 472 and a third contact portion 474. The configuration including the above has been described. As a result, the contact (contact) region of the second contacted portion 472 and the third contacted portion 474 can be easily and widely secured outside the effective regions A1 and A2, and the light on the optical path is obstructed. It is possible to easily position the optical member 4 without any problem.

Further, the holding member 5 includes a first positioning portion 53 having a first contact portion 531 and a first optical path portion 532, a second positioning portion 54 having a second contact portion 542 and a second optical path portion 543, and a second. A third positioning portion (lower side wall 522) on which the three contact portions 522a are formed is provided. As a result, the holding member 5 can position and fix the optical member 4 without obstructing the light transmitted through the optical member 4.

Further, the first positioning portion 53, the second positioning portion 54, and the third positioning portion (lower side wall 522) are connected to each other, and the first contact portion 531, the second contact portion 542, and the third contact portion 522a are connected to each other. Each of the first contacted portion 41, the second contacted portion 472, and the third contacted portion 474 of the optical member 4 are vertically formed. As a result, the optical member 4 can be positioned on the optical path with reference to the X-axis, Y-axis, and Z-axis in the orthogonal coordinate system.

Further, the fixing member 6 includes a first pressing portion (621) that urges the third contacted portion 474 of the optical member 4 toward the third contacted portion 522a, and the first contacted portion 41 of the optical member 4. And a second pressing portion (611) that urges the second contacted portion 472 toward the first contacted portion 531 and the second contacted portion 542, respectively. This makes it possible to prevent misalignment when the optical member 4 is fixed by the fixing member 6. Further, even while the optical member 4 is fixed, the optical member 4 can be stably supported by restricting movement in the X-axis direction, the Y-axis direction, and the Z-axis direction.

Further, a light source device 60 and a light source device 60 including a light source (excitation light irradiation device 70 in the present embodiment), the optical member 4 to which the light L1 emitted from the light source is incident, and the holding member 5 supporting the optical member 4. In the projection device 10, since the holding member 5 can stably position the optical member 4 with high accuracy, it is possible to prevent the optical member 4 from being displaced even if vibration or the like is applied to the housing. Further, the number of optical members can be reduced by configuring the optical member 4 to have a plurality of optical functions, and the light source device 60 and the projection device 10 can be miniaturized as a whole.

Further, in the method of holding the optical member 4 by the holding member 5 described above, the first contact portion 41 is positioned in the Y-axis direction in parallel with the ZX plane by the first contact portion 531 and the second contact portion 542. The second contacted portion 472 is positioned in the X-axis direction in parallel with the YZ plane, and the third contacted portion 474 is positioned in the Z-axis direction in parallel with the XY plane by the third contacted portion 522a. The optical member 4 is fixed to the holding member 5. As a result, the optical member 4 has (1) a height direction position (Z-axis direction position), (2) a left-right direction position (X-axis direction position), and (3) a front-back direction position (Y) with respect to the holding member 5. Axial position), (4) Front angle position (angle θy position around Y axis), (5) Tilt angle (angle θx position around X axis), and (6) Horizontal angle (angle θz position around Z axis) ) Is stably fixed to the 6 degrees of freedom. Therefore, the holding member 5 can easily and accurately position the optical member 4.

The embodiments described above are presented as examples, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and variations thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

The inventions described in the first claims of the present application are described below.
[1] A holding member that holds an optical member.
The optical member includes a first contacted portion provided on the first reference plane side, a second contacted portion provided on the second reference plane side intersecting the first reference plane, and the first contacted portion. A reference plane and a third contacted portion provided on the third reference plane side intersecting with the second reference plane are provided.
The first contact portion that positions the position of the first contact portion in the first axial direction, and the first contact portion.
A second contact portion that positions the position of the second contact portion in the second axial direction that intersects the first axial direction, and the second contact portion.
A third contact portion that positions the position in the third axial direction intersecting the first axial direction and the second axial direction of the third contact portion, and the third contact portion.
A holding member comprising.
[2] The optical member is
A first lens surface juxtaposed with the flat first contacted portion on the first reference surface side,
The second lens surface provided on the second reference surface side and
An extension portion provided with a flat second contacted portion and a flat third contacted portion extending outside the effective region of the optical path of the first lens surface and the second lens surface. When,
The holding member according to the above [1].
[3] A first positioning portion having a flat first contact portion and a first optical path portion for transmitting light in an effective region on the first reference plane.
A second positioning portion having a flat second contact portion and a second optical path portion that transmits light in an effective region on the second reference plane.
A third positioning portion provided with the flat third contact portion, and a third positioning portion.
The holding member according to the above [1] or the above [2].
[4] The first positioning unit, the second positioning unit, and the third positioning unit are connected to each other.
The first contact portion, the second contact portion, and the third contact portion are provided vertically, respectively.
The first contacted portion, the second contacted portion, and the third contacted portion of the optical member are vertically provided.
The holding member according to the above [3].
[5] A fixing member for fixing the optical member is provided.
The fixing member is
A first pressing portion that urges the third contacted portion of the optical member toward the third contact portion, and
A second pressing portion that urges the first contact portion and the second contact portion of the optical member toward the first contact portion and the second contact portion, respectively.
The holding member according to any one of the above [1] to the above [4].
[6] A light source, an optical member to which light emitted from the light source is incident, and a holding member for supporting the optical member are provided.
The optical member includes a first contacted portion provided on the first reference plane side, a second contacted portion provided on the second reference plane side intersecting the first reference plane, and the first contacted portion. A reference plane and a third contacted portion provided on the third reference plane side intersecting with the second reference plane are provided.
The holding member has a first contact portion that positions the first axial position of the first contact portion and a second axial position that intersects the first axial direction of the second contact portion. A second contact portion for positioning and a third contact portion for positioning the position in the third axial direction intersecting the first axial direction and the second axial direction of the third contact portion are provided.
A light source device characterized by that.
[7] The light source device according to the above [6] and
A display element that is irradiated with light from the light source from the light source device to form image light, and
A projection optical system that projects the image light emitted from the display element onto a screen, and
A control unit that controls the display element and the light source device,
A projection device characterized by having.
[8] A method of holding an optical member by a holding member.
The optical member includes a first contacted portion provided on the first reference plane side, a second contacted portion provided on the second reference plane side intersecting the first reference plane, and the first contacted portion. A reference plane and a third contacted portion provided on the third reference plane side intersecting with the second reference plane are provided.
The holding member includes a first contact portion, a second contact portion, and a third contact portion, respectively.
The position of the first contacted portion in the first axial direction is positioned by the first contact portion.
The position of the second contacted portion in the second axial direction intersecting with the first axial direction is positioned by the second contact portion.
The third contact portion positions the position of the third contact portion in the first axial direction and the third axial direction intersecting with the second axial direction.
A holding method characterized by that.

4 Optical member 5 Holding member 6 Fixing member 6a Edge 6b Edge edge 10 Projector 12 Front panel 13 Back panel 14 Right panel 15 Left panel 21 I / O connector 22 I / O interface 23 Image converter 24 Display encoder 25 Video RAM 26 Display drive unit 27 Display element 28 Light source control circuit 29 Lens motor 31 Image compression / expansion unit 32 Memory card 33 Cooling fan drive control circuit 34 Voice processing unit 35 Ir receiver 36 Ir processing unit 37 Key / indicator 38 Control unit 39 Speaker 40 Lens body 41 First contacted 42 First lens surface 43 Second lens surface 44 Flat part 45 Reflective surface 46 Top surface 47 Extended part 51 Lens holding part 52 Lens holding part 53 First positioning part 54 Second Positioning part 55 Fixed part 57 Accommodating part 58 Lens holding part 60 Light source device 61 Notch 61a Bottom 62 Notch 62a Bottom 63 Screw hole 64 Screw hole 65 Screw 70 Excitation light irradiation device 71 Blue laser diode 73 Collimeter lens 75 Reflection mirror Group 80 Green light source device 81 Heat sink 100 Fluorescent wheel device 101 Fluorescent wheel 102 Base material 102a Surface 110 Motor 111 Condensing lens group 112 Opening 120 Red light source device 121 Red light emitting diode 125 Condensing lens group 130 Heat sink 140 Light guide optical system 141 First dichroic mirror 145 Reflective mirror 146 Condensing lens 147 Condensing lens 148 Second dichroic mirror 149 Condensing lens 170 Light source side optical system 173 Condensing lens 175 Light guide device 178 Condensing lens 181 Optical axis conversion mirror 183 Condensing lens 185 Irradiation mirror 190 Heat sink 195 Condenser lens 220 Projection optical system 225 Fixed lens group 235 Movable lens group 261 Cooling fan 310 Fluorescent light emitting area 320 Transmission area 431 Top 471 Side 472 Second contact 473 Side 474 Third contact 475 Stepped part 511 Opening part 520 Lens accommodating part 520a Outer peripheral part 521 Upper side wall 522 Lower side wall 522a Third contact part 531 First contact part 532 First optical path part 541 Inner surface 542 Second contact part 543 Second optical path part 591 Female screw part 592 Female screw part 611 Second Pressing part 612 Contact part 621 First pressing part 622 Contact part A1, A2 Effective area G Adhesive L1 Light S Irradiation area S1 First reference surface S2 Second reference surface S3 Third reference surface SB System bus X1 Central axis Y1 Central axis Y2 Cylindrical Central axis θx angle θy angle θz angle

Claims (8)

A holding member that holds an optical member.
The optical member includes a first contacted portion provided on the first reference plane side, a second contacted portion provided on the second reference plane side intersecting the first reference plane, and the first contacted portion. A reference plane and a third contacted portion provided on the third reference plane side intersecting with the second reference plane are provided.
The first contact portion that positions the position of the first contact portion in the first axial direction, and the first contact portion.
A second contact portion that positions the position of the second contact portion in the second axial direction that intersects the first axial direction, and the second contact portion.
A third contact portion that positions the position in the third axial direction intersecting the first axial direction and the second axial direction of the third contact portion, and the third contact portion.
A holding member comprising. The optical member is
A first lens surface juxtaposed with the flat first contacted portion on the first reference surface side,
The second lens surface provided on the second reference surface side and
An extension portion provided with a flat second contacted portion and a flat third contacted portion extending outside the effective region of the optical path of the first lens surface and the second lens surface. When,
The holding member according to claim 1, wherein the holding member comprises. A first positioning portion having a flat first contact portion and a first optical path portion for transmitting light in an effective region on the first reference plane.
A second positioning portion having a flat second contact portion and a second optical path portion that transmits light in an effective region on the second reference plane.
A third positioning portion provided with the flat third contact portion, and a third positioning portion.
The holding member according to claim 1 or 2, wherein the holding member is provided with. The first positioning unit, the second positioning unit, and the third positioning unit are connected to each other.
The first contact portion, the second contact portion, and the third contact portion are provided vertically, respectively.
The first contacted portion, the second contacted portion, and the third contacted portion of the optical member are vertically provided.
The holding member according to claim 3. A fixing member for fixing the optical member is provided.
The fixing member is
A first pressing portion that urges the third contacted portion of the optical member toward the third contact portion, and
A second pressing portion that urges the first contact portion and the second contact portion of the optical member toward the first contact portion and the second contact portion, respectively.
The holding member according to any one of claims 1 to 4, wherein the holding member is provided with. A light source, an optical member to which light emitted from the light source is incident, and a holding member for supporting the optical member are provided.
The optical member includes a first contacted portion provided on the first reference plane side, a second contacted portion provided on the second reference plane side intersecting the first reference plane, and the first contacted portion. A reference plane and a third contacted portion provided on the third reference plane side intersecting with the second reference plane are provided.
The holding member has a first contact portion that positions the first axial position of the first contact portion and a second axial position that intersects the first axial direction of the second contact portion. A second contact portion for positioning and a third contact portion for positioning the position in the third axial direction intersecting the first axial direction and the second axial direction of the third contact portion are provided.
A light source device characterized by that. The light source device according to claim 6 and
A display element that is irradiated with light from the light source from the light source device to form image light, and
A projection optical system that projects the image light emitted from the display element onto a screen, and
A control unit that controls the display element and the light source device,
A projection device characterized by having. It is a method of holding an optical member by a holding member.
The optical member includes a first contacted portion provided on the first reference plane side, a second contacted portion provided on the second reference plane side intersecting the first reference plane, and the first contacted portion. A reference plane and a third contacted portion provided on the third reference plane side intersecting with the second reference plane are provided.
The holding member includes a first contact portion, a second contact portion, and a third contact portion, respectively.
The position of the first contacted portion in the first axial direction is positioned by the first contact portion.
The position of the second contacted portion in the second axial direction intersecting with the first axial direction is positioned by the second contact portion.
The third contact portion positions the third axial position that intersects the first axial direction and the second axial direction of the third contact portion.
A holding method characterized by that.

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