JP2022045955A - 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 provided near a first reference surface; and a second contact target part 431 provided near a second reference surface, perpendicular to the first reference surface side. The holding member 5 for holding the optical member 4 includes: a first positioning part 53 including a first contact part 531 for determining the position of a first contact target part in a first axial direction; and a second positioning part 54 including a second contact part 542 for determining the positions of a second contact target part 431 in a second axial direction and in a third axial direction, perpendicular to the first axial direction of the second contact target part.SELECTED DRAWING: Figure 9

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. A first positioning portion including a first contact portion provided on the reference surface side and positioning the first axial position of the first contact portion, and the second contact portion. It is characterized by comprising a second positioning portion including a second contact portion for positioning a second axial position and a third axial position intersecting each other with the first axial direction of the 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 a side view seen from the 2nd lens surface side, (b) is a plan view seen from the upper flat surface side. It is a perspective view of the holding 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. 9 is a sectional view taken along the line XX of the holding member shown in FIG. 9 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 includes a second contacted portion 431 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). It has a curved second lens surface 43. The second lens surface 43 is a convex cylindrical surface curved around a cylindrical central axis (corresponding to the axis Y2 in FIG. 9) parallel to the Y axis (in other words, parallel to the central axis Y1 of the first lens surface 42). Formed as a cylindrical lens to have. 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). Further, the second contacted portion 431 of the present embodiment is provided outside the effective region A2 on the second lens surface 43. Therefore, the second contacted portion 431 is formed on a curved surface. The second contacted portion 431 is formed at two locations above and below the effective region A2.

The optical member 4 has a third contacted portion 44 on a third reference surface S3 which is parallel to the second reference surface S2 and is located on the opposite side of the second lens surface 43. The third contacted portion 44 is formed in a flat surface shape parallel to the YZ plane. The third contacted portion 44 is provided on the side of the first lens surface 42 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 is on the back side opposite to the first lens surface 42 with respect to the first reference surface S1, the second reference surface S2, and the third reference surface S3. It has a reflective surface 45 that is inclined. The reflective surface 45 is formed perpendicular to the XY plane. 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. Further, flat surfaces 46 and 47 parallel to the XY plane are formed on the upper surface side and the lower surface side of the optical member 4 in the Z-axis direction.

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. Fixing portions 55 and 56 capable of fixing the holding member 5 to the inner case (not shown) of the light source device 60 are formed on the upper portions of the lens holding portion 51 and the lens holding portion 52. 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 the upper plate 521 and the lower plate 522, respectively. The upper plate 521 and the lower plate 522 are formed parallel to the XY plane. Therefore, the lens holding portion 52 is formed in a box shape in which the X-axis positive direction side and the Y-axis positive direction side are open.

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. The second positioning portion 54 has a rib-shaped second contact portion 542 that protrudes inward from the inner surface 541. The second contact portion 542 stands substantially vertically at the same height from the inner surface 541, and has a contact surface 542a capable of contacting the second contact portion 431 of the optical member 4 at an end portion. Therefore, the contact surface 542a of the second contact portion 542 is perpendicular to the first contact portion 531 and has a virtual curved surface S4 having the same diameter as the cylindrical second lens surface 43 (see FIG. 9). Placed on top.

Further, the contact surface 542a is formed in a flat surface shape perpendicular to the first contact portion 531. Therefore, the contact surface 542a and the second contacted portion 431 come into contact with each other in a substantially line. The contact surface 542a may be formed in a concave shape having substantially the same curvature as the second contacted portion 431, and the contact surface 542a and the second contacted portion 431 may be substantially in contact with each other. May be good. The second contact portion 542 is formed at two positions above and below the Z-axis direction, and the length in the Y-axis direction is formed to be substantially the same as the inner surface 541, respectively.

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 plane S2. The second optical path portion 543 is arranged between the upper and lower second contact portions 542 (in other words, the second optical path portion 542 is formed at two upper and lower positions sandwiching the second optical path portion 543). .. The second optical path portion 543 is not limited to the shape of a through hole and may be provided as a notch portion.

The second positioning unit 54 has a lens holding unit 58 that holds the condenser lens 146 shown in FIG. 2 on a surface opposite to the inner surface 541. Further, the end portion (end portion on the positive direction side of the Y-axis) of the second positioning portion 54 is formed in a flat shape substantially parallel to the ZX plane, and has a positioning protrusion 591 and a female screw portion 592 on the upper and lower sides, respectively. .. The positioning protrusion 591 is provided inside the upper and lower female screw portions 592.

Returning to FIG. 4, a fixing member 6 for pressing and fixing the optical member 4 positioned on the first positioning unit 53 and the second positioning unit 54 is attached to the holding member 5. The fixing member 6 has a mounting portion 61 fixed to the holding member 5, and a pressing portion 62 that presses the optical member 4 toward the first contact portion 531 and the second contact portion 542. The fixing member 6 is formed of a metal plate material.

The mounting portion 61 is formed in the shape of an oblong rectangular plate and has positioning holes 611 and 612. One positioning hole 611 is a round hole, and the other positioning hole 612 is formed in an elongated shape. A cylindrical positioning protrusion 591 formed in the second positioning portion 54 is inserted into each of the positioning holes 611 and 612, and the mounting position of the fixing member 6 is positioned. Further, a screw hole 613 (detailed shape is not shown) is formed in the mounting portion 61. The fixing member 6 is fixed to the holding member 5 by fastening the screw 63 inserted through the screw hole 613 to the female screw portion 592.

The pressing portion 62 is formed in the shape of an elongated rectangular plate that is bent and extended from the mounting portion 61. In a state where the fixing member 6 is fixed to the holding member 5, the pressing portion 62 extends toward the first positioning portion 53 side. The pressing portion 62 is formed in the shape of a cantilevered leaf spring connected with the mounting portion 61 side as a fulcrum portion. Further, the tip portion of the pressing portion 62 is folded back in the direction away from the first positioning portion 53 and the second positioning portion 54. Therefore, at the tip of the pressing portion 62, a convex contact portion 621 is formed on the optical member 4 side shown in FIG.

Next, a method of positioning the optical member 4 will be described mainly with reference to FIGS. 8 to 10. 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. 8, 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. 9, the second contacted portion 431 is brought into contact with the contact surface 542a of the rib-shaped second contacted portion 542. In the present embodiment, since the contact surface 542a is formed flat, the second contact portion 431 and the second contact portion 542 are drawn approximately along the Y-axis direction above and below the optical member 4. It is in contact. Since the second lens surface 43 is supported by the contact surface 542a located on the virtual curved surface S4, the X-axis direction position (second axis direction position) and the Z-axis direction position (third axis direction position) of the optical member 4 ) (The above-mentioned (2) left-right position and (1) height direction position) are positioned. Since the contact surface 542a extends in the Y-axis direction, the optical member 4 is also positioned at an angle θx position around the X axis and an angle θz position around the Z axis. The optical member 4 includes the optical axis of the light L1 emitted from the condenser lens group 111 (or the fluorescent wheel 101) by the first positioning unit 53 and the second positioning unit 54, and the central axis Y1 of the first lens surface 42. Are positioned to approximately match.

After that, the optical member 4 is pressed against the third contacted portion 44 by an appropriate jig (not shown) to the second contacted portion 542 side (adjustment direction D1 (X-axis negative direction) side shown by the broken line in FIG. 9). ). At this time, the third contacted portion 44 is positioned at an angle θy position (the above-mentioned (4) front angle) around the Y axis while being adjusted to be parallel to the YZ plane (more specifically, a curved surface). Positioned at an angle θy1 position around the axis Y2, which is the central axis of S4). As a result, the movement of the optical member 4 along the curved surface S4 is restricted, and the central axis of the second lens surface 43 (that is, the optical axis of the light L1 emitted from the second lens surface 43) and the condenser lens 146 (that is, the optical axis of the light L1 emitted from the second lens surface 43). (See FIG. 2) can be substantially aligned with the central axis.

As shown in FIG. 10, the optical member 4 can be fixed by the fixing member 6 in a state of being positioned by the first positioning unit 53 and the second positioning unit 54. 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 62 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 contacted portion 41 and the first contacted portion 531 are brought into contact with each other, the adhesive G (FIG. 10) is previously applied to one or both of the first contacted portion 41 and the first contacted portion 531. See) can be applied. As a result, while the third contacted portion 44 is urged in the above-mentioned adjustment direction D1 by the jig, the first contacted portion 41 and the first contacted portion 531 are adhered to each other to form an optical member. The posture of 4 can be fixed. The adhesive G can be used as a temporary fixing that suppresses the rotation of the angle θy position around the Y axis when fixed by the fixing member 6, but the optical member 4 uses the adhesive G without using the fixing member 6. It may be used as a fixing member.

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.

As described above, in the optical member 4 described in the embodiment of the present invention, the first contacted portion 41 provided on the first reference surface S1 side and the second reference surface intersecting the first reference surface S1. A second contacted portion 431 provided on the S2 side is provided. The holding member 5 has a first positioning portion 53 including a first contact portion 531 for positioning the first axial position of the first contact portion 41 and the first axial direction of the second contact portion 431. It includes a second positioning portion 54 including a second contact portion 542 that positions the intersecting second axial position and the third axial position. When the optical member 4 is attached, it can be easily adjusted so as to be parallel to the YZ plane perpendicular to the second axial direction.

As a result, the optical member 4 is placed with respect to the holding member 5 in (1) height direction position (Z-axis direction position), (2) left-right direction position (X-axis direction position), and (3) front-back direction position (Y). 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) ) Can be stably fixed with respect to the 6 degrees of freedom. Therefore, the holding member 5 can position the optical member 4 with high accuracy.

Further, a first lens surface 42 is provided in parallel with the flat first contacted portion 41 on the first reference surface S1 side, and a curved second contacted portion 41 is provided on the second reference surface S2 side. The configuration is such that the second lens surface 43 including the portion 431 is provided. As a result, the holding member 5 can support the lens surface side and reliably position and hold the optical member 4 that can collect light and guide the light.

Further, the first reference surface S1 and the second reference surface S2 are provided perpendicularly, the second lens surface 43 is a cylindrical surface perpendicular to the first reference surface S1, and the first contact portion 531 is further provided. It is a flat surface perpendicular to the first axial direction, and the rib-shaped second contact portion 542 is provided perpendicular to the first contact portion 531 and is arranged on a curved surface S4 having the same diameter as the cylindrical surface. The configuration having the contact surface 542a has been described. As a result, the holding member 5 can be easily positioned by supporting a part of the cylindrical surface even if the optical member 4 is a deformed lens having a partially cylindrical surface.

Further, the optical member 4 includes a third contact portion 44 formed on the third reference surface S3 side located on the opposite side of the second contact portion 431 parallel to the second reference surface S2, and the third contact portion 44 is provided. The holding member 5 in which the contact portion 44 is provided on a flat surface can hold the optical member 4 while easily adjusting the angle θy position around the Y axis.

Further, the first contacted portion 41 is provided outside the effective region A1 of the optical path on the first reference surface S1, and the second contacted portion 431 is provided outside the effective region A2 of the optical path on the second reference surface S2. Be done. Further, the first positioning unit 53 has a first optical path portion 532 that transmits the light of the effective region A1 on the first reference surface S1, and the second positioning unit 54 has the light of the effective region A2 on the second reference surface S2. It has a second optical path portion 543 for transmitting the light. 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, if the fixing member 6 for fixing the optical member 4 is provided, and the fixing member 6 urges and fixes the optical member 4 on the first contact portion 531 side and the second contact portion 542 side, the optical member 4 is optically fixed. The member 4 can be stably held in a state of being positioned with respect to the holding member 5.

Further, a light source device 60 and a light source device 60 including a light source (excitation light irradiation device 70 in this embodiment), an optical member 4 to which light L1 emitted from the light source is incident, and the above-mentioned holding member 5 that supports 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 531 positions the position in the first axial direction of the first contact portion 41, and the second contact portion 542 positions the second cover. The configuration is such that the positions in the second axial direction and the positions in the third axial direction that intersect each other with the first axial direction of the contact portion 431 are positioned. 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 position the optical member 4 with high accuracy.

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 and a second contacted portion provided on the second reference plane side intersecting the first reference plane.
A first positioning portion including a first contact portion for positioning the position in the first axial direction of the first contacted portion, and a first positioning portion.
A second positioning portion including a second contact portion that positions a second axial position and a third axial position that intersect each other with the first axial direction of the second contacted portion.
A holding member comprising.
[2] A first lens surface is provided on the first reference surface side in parallel with the flat first contacted portion.
A second lens surface including the curved second contacted portion is provided on the second reference surface side.
The holding member according to the above [1].
[3] The first reference plane and the second reference plane are provided vertically.
The second lens surface is a cylindrical surface perpendicular to the first reference surface.
The first contact portion is a flat surface perpendicular to the first axial direction.
The rib-shaped second contact portion has a contact surface provided perpendicular to the first contact portion and arranged on a curved surface having the same diameter as the cylindrical surface.
The holding member according to the above [2].
[4] The optical member includes a third contacted portion formed on the third reference plane side parallel to the second reference plane and located on the opposite side of the second contacted portion.
The holding member according to any one of the above [1] to [3], wherein the third contacted portion is provided in a flat surface shape.
[5] The first contacted portion is provided outside the effective region of the optical path on the first reference plane.
The second contacted portion is provided outside the effective region of the optical path on the second reference plane.
The first positioning portion has a first optical path portion that transmits light in an effective region on the first reference plane.
The second positioning portion has a second optical path portion that transmits light in an effective region on the second reference plane.
The holding member according to any one of the above [1] to the above [4].
[6] A fixing member for fixing the optical member is provided.
The fixing member is described in any one of the above [1] to the above [5], wherein the optical member is urged and fixed to the first contact portion side and the second contact portion side. Holding member.
[7] 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 and a second contacted portion provided on the second reference plane side intersecting the first reference plane.
The holding member intersects the first positioning portion including the first contact portion for positioning the first axial position of the first contact portion and the first axial direction of the second contact portion. The second positioning portion including the second contact portion for positioning the second axial position and the third axial position is provided.
A light source device characterized by that.
[8] The light source device according to the above [7] 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.
[9] 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 and a second contacted portion provided on the second reference plane side intersecting the first reference plane.
The holding member includes a first positioning portion including a first contact portion and a second positioning portion including a second contact portion.
The position of the first contacted portion in the first axial direction is positioned by the first contact portion.
The second contact portion positions the second axial position and the third axial position that intersect with each other in the first axial direction of the second contact portion.
A holding method characterized by that.

4 Optical member 5 Holding member 6 Fixing member 10 Projector 12 Front panel 13 Back panel 14 Right panel 15 Left panel 21 Input / output connector unit 22 Input / output interface 23 Image conversion unit 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 Audio processing unit 35 Ir receiver 36 Ir processing unit 37 Key / indicator 38 Control unit 39 Speaker 41 First contact Part 42 First lens surface 43 Second lens surface 44 Third contacted part 45 Reflective surface 46 Flat surface 47 Flat surface 51 Lens holding part 52 Lens holding part 53 First positioning part 54 Second positioning part 55 Fixed part 56 Fixed Part 57 Accommodating part 58 Lens holding part 60 Light source device 61 Mounting part 62 Pressing part 63 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 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 Guide optical system 141 First dichroic mirror 145 Reflection 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 Second contacted part 511 Opening 521 Upper plate 522 Lower plate 531 First contact part 532 First optical path part 541 Inner surface 542 Second contact part 542a Contact surface 543 Second optical path part 591 Positioning protrusion 592 Female screw part 611 Positioning hole 612 Positioning hole 613 Screw hole 621 Contact part A1 Effective area A2 Effective area D1 Adjustment direction G Adhesive L1 Optical S Irradiation area S1 First 1 reference plane S2 2nd reference plane S3 3rd reference plane S 4 Curved surface SB system bus X1 Central axis Y1 Central axis θx Angle θy Angle θz Angle θy1 Angle

Claims (9)

A holding member that holds an optical member.
The optical member includes a first contacted portion provided on the first reference plane side and a second contacted portion provided on the second reference plane side intersecting the first reference plane.
A first positioning portion including a first contact portion for positioning the position in the first axial direction of the first contacted portion, and a first positioning portion.
A second positioning portion including a second contact portion that positions a second axial position and a third axial position that intersect each other with the first axial direction of the second contacted portion.
A holding member comprising. A first lens surface is provided on the first reference surface side in parallel with the flat first contacted portion.
A second lens surface including the curved second contacted portion is provided on the second reference surface side.
The holding member according to claim 1. The first reference plane and the second reference plane are provided vertically, and the first reference plane and the second reference plane are provided vertically.
The second lens surface is a cylindrical surface perpendicular to the first reference surface.
The first contact portion is a flat surface perpendicular to the first axial direction.
The rib-shaped second contact portion has a contact surface provided perpendicular to the first contact portion and arranged on a curved surface having the same diameter as the cylindrical surface.
The holding member according to claim 2. The optical member includes a third contacted portion formed on the third reference plane side parallel to the second reference plane and located on the opposite side of the second contacted portion.
The holding member according to any one of claims 1 to 3, wherein the third contacted portion is provided in a flat surface shape. The first contacted portion is provided outside the effective region of the optical path on the first reference plane.
The second contacted portion is provided outside the effective region of the optical path on the second reference plane.
The first positioning portion has a first optical path portion that transmits light in an effective region on the first reference plane.
The second positioning portion has a second optical path portion that transmits light in an effective region on the second reference plane.
The holding member according to any one of claims 1 to 4, wherein the holding member is characterized in that. A fixing member for fixing the optical member is provided.
The holding according to any one of claims 1 to 5, wherein the fixing member is urged and fixed to the first contact portion side and the second contact portion side. Element. 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 and a second contacted portion provided on the second reference plane side intersecting the first reference plane.
The holding member intersects the first positioning portion including the first contact portion for positioning the first axial position of the first contact portion and the first axial direction of the second contact portion. The second positioning portion including the second contact portion for positioning the second axial position and the third axial position is provided.
A light source device characterized by that. The light source device according to claim 7 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 and a second contacted portion provided on the second reference plane side intersecting the first reference plane.
The holding member includes a first positioning portion including a first contact portion and a second positioning portion including a second contact portion.
The position of the first contacted portion in the first axial direction is positioned by the first contact portion.
The second contact portion positions the second axial position and the third axial position that intersect with each other in the first axial direction of the second contact portion.
A holding method characterized by that.

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