JP5892363B2 - Optical element fixing device, projector including optical element fixing device, and angle adjustment method of optical element by optical element fixing device - Google Patents

Description

  The present invention relates to an optical element fixing device, a projector including the optical element fixing device, and a method of adjusting an angle of the optical element by the optical element fixing device.

  2. Description of the Related Art Today, data projectors are widely used as image projection apparatuses that project a screen of a personal computer, a video image, an image based on image data stored in a memory card or the like onto a screen. This projector condenses the light emitted from the light source with a lens, reflects it with a mirror, condenses it on a micromirror display element called a DMD (digital micromirror device) or a liquid crystal plate, and places it on the screen. A color image is displayed.

  In a general projector using a DMD, light emitted from a light source device via a predetermined optical system needs to be reflected by a mirror of a mirror fixing device disposed immediately before the DMD, and accurately irradiated to the DMD. Therefore, it is necessary to adjust the mirror angle with high accuracy.

  In a conventional mirror fixing device for a projector, a movable member with a mirror attached to a frame fixed to the casing side is a spherical support and three adjustments arranged in three directions around the spherical support. The angle is supported by screws. When adjusting the angle of the mirror, the angle of the mirror is adjusted by rotating the three adjusting screws forward or backward with a jig such as a screwdriver from the outside of the housing.

  For example, as a camera shake correction device that adjusts the angle of an optical system, Patent Document 1 includes a fixed-side unit fixed to the main body side and a movable-side unit provided with an optical element such as a lens. Discloses a device that performs correction by swinging the movable unit with the hinge as a connection point.

JP 2009-205015 A

  However, in the projector capable of adjusting the angle of the mirror with the three adjusting screws, it is necessary to provide a relatively large opening or lid in the exterior portion in order to adjust the three adjusting screws. In a mirror fixing device that reflects light toward the DMD from a laterally lower direction that is oblique with respect to the DMD, adjustment is required to correctly irradiate the DMD with the reflected light using the three adjustment screws. Time required, and there was a drawback that productivity efficiency could not be improved.

  Further, the apparatus described in Patent Document 1 has a complicated structure because it includes a drive mechanism such as a stepping motor.

  The present invention has been made in view of the above-described problems of the prior art, and includes an optical element fixing device and an optical element fixing device that can easily adjust the angle of an optical element with a simple configuration. An object of the present invention is to provide a projector and a method of adjusting an angle of an optical element by an optical element fixing device.

An optical element fixing device according to the present invention is inserted into a fixed frame having a first frame and a second frame arranged with a space therebetween, and a space between the first frame and the second frame. And an optical element support as a movable member that supports the optical element,
The optical element support includes a movable support that is supported by the second frame so as to swing and rotate about a swing center ;
A spherical support portion protruding in a spherical shape on a surface facing the surface having the movable support portion, and an engaging operation portion on a part of the spherical support portion,
The first frame includes a spherical recess for supporting the spherical support portion, and penetrates from the spherical recess to the outer surface of the first frame at the center of the spherical recess, from the outer shape of the engagement operation portion. Is provided with a hole having a large inner diameter .

  According to the present invention, an optical element fixing device capable of easily adjusting the angle of the optical element with a simple configuration, a projector including the optical element fixing device, and an angle adjusting method of the optical element by the optical element fixing device. Can be provided.

1 is an external perspective view showing a projector according to an embodiment of the invention. It is a figure which shows the functional block of the projector which concerns on embodiment of this invention. 1 is a schematic plan view showing an internal structure of a projector according to an embodiment of the invention. It is the perspective view which expanded the principal parts of the optical element fixing device of the projector which concerns on embodiment of this invention, and the display element which is DMD. It is a bottom view of the projector which concerns on embodiment of this invention. It is sectional drawing of the optical element fixing device of the projector which concerns on embodiment of this invention. It is a flowchart which shows an example of the angle adjustment method of the optical element in the optical element fixing device of the projector which concerns on embodiment of this invention. It is a figure which shows an example of the angle adjustment method of the optical element in the optical element fixing device which concerns on embodiment of this invention. It is a figure which shows an example of the angle adjustment method of the optical element in the optical element fixing device which concerns on embodiment of this invention. It is sectional drawing of the optical element fixing device of the projector which concerns on the modification of embodiment of this invention. It is sectional drawing of the optical element fixing device of the projector which concerns on the other modification of embodiment of this invention. It is sectional drawing of the optical element fixing device of the projector which concerns on the other modification of embodiment of this invention.

  Hereinafter, modes for carrying out the present invention will be described. FIG. 1 is an external perspective view of the projector 10. In the present embodiment, left and right in the projector 10 indicate the left and right direction with respect to the projection direction, and front and rear indicate the screen side direction of the projector 10 and the front and rear direction with respect to the traveling direction of the light beam.

  As shown in FIG. 1, the projector 10 has a substantially rectangular parallelepiped shape, and has a lens cover 19 that covers the projection port on the side of the front panel 12 that is a front side plate of the projector housing. The panel 12 is provided with a plurality of intake holes 18. Further, although not shown, an Ir receiver for receiving a control signal from the remote controller is provided.

  In addition, a key / indicator unit 37 is provided on the top panel 11 of the housing. The key / indicator unit 37 switches a power switch key, a power indicator for notifying power on / off, and switching on / off of projection. Keys and indicators such as an overheat indicator for notifying when a projection switch key, a light source unit, a display element, a control circuit, etc. are overheated are arranged.

  In addition, on the rear surface of the housing, there are provided various terminals 20 such as an input / output connector section and a power adapter plug that provide a USB terminal, a D-SUB terminal for image signal input, an S terminal, an RCA terminal, etc. on the rear panel. Yes. In addition, a plurality of intake holes are formed in the back panel. A plurality of exhaust holes 17 are formed in each of the right panel, which is a side plate of the housing (not shown), and the left panel 15, which is the side plate shown in FIG. An intake hole 18 is also formed at a corner near the back panel of the left panel 15.

Next, projector control means of the projector 10 will be described with reference to the functional block diagram of FIG. The projector control means includes a control unit 38, an input / output interface 22, an image conversion unit 23, a display encoder 24, a display drive unit 26, and the like.
The portion related to the bottom panel 16 of the projector housing will be described later.

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

  Then, the image signal of various standards input from the input / output connector unit 21 by the projector control means is in a predetermined format suitable for display by the image conversion unit 23 via the input / output interface 22 and the system bus (SB). After being converted so as to be unified into an image signal, it is output to the display encoder 24.

  The display encoder 24 develops 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 functions as display element control means, and drives the display element 51, which is a spatial light modulation element (SOM), at an appropriate frame rate corresponding to the image signal output from the display encoder 24. Is. Then, the projector 10 irradiates the light beam emitted from the light source unit 60 to the display element 51 through the light guide optical system, thereby forming an optical image with the reflected light of the display element 51, and a projection described later. An image is projected and displayed on a screen (not shown) via the side optical system 220. The movable lens group 235 of the projection side optical system 220 is driven by the lens motor 45 for zoom adjustment and focus adjustment.

  Further, the image compression / decompression unit 31 performs a recording process in which the luminance signal and the color difference signal of the image signal are data-compressed by a process such as ADCT and Huffman coding, and are sequentially written in a memory card 32 which is a detachable recording medium. .

  Further, the image compression / decompression unit 31 reads the image data recorded on the memory card 32 in the reproduction mode, decompresses each image data constituting a series of moving images in units of one frame, and converts the image data into an image conversion Based on the image data that is output to the display encoder 24 via the unit 23 and stored in the memory card 32, processing for enabling display of a moving image or the like is performed.

  An operation signal of a key / indicator unit 37 composed of a main key and an indicator provided on the top panel 11 of the housing is directly sent to the control unit 38, and a key operation signal from the remote controller is sent to the Ir receiving unit 35. , And the code signal demodulated by the Ir processor 36 is output to the controller 38.

  Note that an audio processing unit 47 is connected to the control unit 38 via a system bus (SB). The sound processing unit 47 includes a sound source circuit such as a PCM sound source, converts the sound data into analog in the projection mode and the playback mode, and drives the speaker 48 to emit loud sounds.

  Further, the control unit 38 controls a light source control circuit 41 as a light source control means, and the light source control circuit 41 is configured so that light of a predetermined wavelength band required at the time of image generation is emitted from the light source unit 60. The light emission of the excitation light irradiation device, the red light source device, and the blue light source device of the light source unit 60 is individually controlled.

  Further, the control unit 38 causes the cooling fan drive control circuit 43 to perform temperature detection using a plurality of temperature sensors provided in the light source unit 60 and the like, and controls the rotation speed of the cooling fan from the result of the temperature detection. Further, the control unit 38 causes the cooling fan drive control circuit 43 to keep the cooling fan rotating even after the projector body is turned off by a timer or the like, or to turn off the projector body depending on the result of temperature detection by the temperature sensor. Control is also performed.

  Next, the internal structure of the projector 10 will be described. FIG. 3 is a schematic plan view showing the internal structure of the projector 10. As shown in FIG. 3, the projector 10 includes a control circuit board 241 in the vicinity of the right panel 14. The control circuit board 241 includes a power circuit block, a light source control block, and the like. In addition, the projector 10 includes a light source unit 60 on the side of the control circuit board 241, that is, at a substantially central portion of the projector housing. Further, the projector 10 includes an optical system unit 160 between the light source unit 60 and the left panel 15.

  The light source unit 60 includes an excitation light irradiation device 70 that is a light source device disposed in the vicinity of the rear panel 13 at a substantially central portion in the left-right direction of the projector housing, and a light flux emitted from the excitation light irradiation device 70. A fluorescent light emitting device 100 arranged on the optical axis and in the vicinity of the front panel 12, and a blue light source device arranged in the vicinity of the front panel 12 so as to be parallel to the light beam emitted from the fluorescent light emitting device 100 300, the red light source device 120 disposed between the excitation light irradiation device 70 and the fluorescent light emitting device 100, the emitted light from the fluorescent light emitting device 100, the emitted light from the red light source device 120, the blue light source device 300 And a light guide optical system 140 that converts the optical axes of the emitted light to the same optical axis and guides each color light to the entrance of the light tunnel 175, which is a predetermined surface.

  The excitation light irradiation device 70 includes an excitation light source 71 which is a light source element such as a laser element arranged so that the optical axis is parallel to the rear panel 13, and the optical axis of the light emitted from the excitation light source 71 in the direction of the front panel 12 A reflecting mirror group 75 that converts the light to 90 degrees, a condenser lens 78 that condenses the light emitted from the excitation light source 71 reflected by the reflection mirror group 75, and a heat sink disposed between the excitation light source 71 and the right panel 14. 81.

  The excitation light source 71 includes a total of 24 blue laser diodes in 3 rows and 8 columns arranged in a matrix. On the optical axis of each blue laser diode, the light emitted from each blue laser diode is converted into parallel light. A collimator lens 73, which is a condenser lens, is disposed. The reflection mirror group 75 includes a plurality of reflection mirrors arranged in a stepped manner, and reduces the cross-sectional area of the light beam emitted from the excitation light source 71 in one direction and emits it to the condensing lens 78.

  Two cooling fans 261 are disposed between the heat sink 81 and the back panel 13, and the excitation light source 71 is cooled by the cooling fan 261 and the heat sink 81. Further, a cooling fan 261 is also disposed between the reflection mirror group 75 and the back panel 13, and the reflection mirror group 75 and the condenser lens 78 are cooled by the cooling fan 261.

  The fluorescent light emitting device 100 is arranged so as to be parallel to the front panel 12, that is, the fluorescent wheel 101 disposed so as to be orthogonal to the optical axis of the emitted light from the excitation light irradiation device 70, and the fluorescent wheel 101 is rotationally driven. And a condensing lens group 111 that condenses the light bundle emitted from the fluorescent wheel 101 toward the rear panel 13.

  The fluorescent wheel 101 is a disk-shaped metal substrate, and an annular fluorescent light emitting region that emits fluorescent light in the green wavelength band using the light emitted from the excitation light source 71 as excitation light is formed as a recess, and the excitation light And functions as a fluorescent plate that emits fluorescence. In addition, the surface of the fluorescent light wheel 101 including the fluorescent light emitting region on the side of the excitation light source 71 is mirror-processed by silver deposition or the like to form a reflective surface that reflects light, and a green phosphor layer is formed on the reflective surface. It is laid.

  The light emitted from the excitation light irradiating device 70 applied to the green phosphor layer of the fluorescent wheel 101 excites the green phosphor in the green phosphor layer, and the light bundle is emitted in all directions from the green phosphor. Is emitted directly to the excitation light source 71 side or after being reflected by the reflection surface of the fluorescent wheel 101 to the excitation light source 71 side. Moreover, the excitation light irradiated to the metal substrate without being absorbed by the phosphor of the phosphor layer is reflected by the reflecting surface and is incident on the phosphor layer again to excite the phosphor. Therefore, by using the surface of the concave portion of the fluorescent wheel 101 as a reflective surface, the utilization efficiency of the excitation light emitted from the excitation light source 71 can be increased, and the light can be emitted more brightly.

  In the excitation light reflected on the phosphor layer side by the reflecting surface of the fluorescent wheel 101, the excitation light emitted to the excitation light source 71 side without being absorbed by the phosphor passes through a first dichroic mirror 141 described later. Since the fluorescent light is reflected by the first dichroic mirror 141, the excitation light is not emitted to the outside. A cooling fan 261 is disposed between the wheel motor 110 and the front panel 12, and the fluorescent wheel 101 is cooled by the cooling fan 261.

  The red light source device 120 includes a red light source 121 disposed so that the optical axis is parallel to the excitation light source 71, and a condensing lens group 125 that condenses the light emitted from the red light source 121. The red light source device 120 is disposed so that the optical axis intersects the light emitted from the excitation light irradiation device 70 and the green wavelength band light emitted from the fluorescent wheel 101. The red light source 121 is a red light emitting diode as a semiconductor light emitting element that emits red wavelength band light. Furthermore, the red light source device 120 includes a heat sink 130 disposed on the right panel 14 side of the red light source 121. A cooling fan 261 is disposed between the heat sink 130 and the front panel 12, and the red light source 121 is cooled by the cooling fan 261.

  The blue light source device 300 includes a blue light source 301 disposed so as to be parallel to the optical axis of the light emitted from the fluorescent light emitting device 100, and a condenser lens group 305 that collects the light emitted from the blue light source 301. Prepare. The blue light source device 300 is arranged so that the light emitted from the red light source device 120 and the optical axis intersect. The blue light source 301 is a blue light emitting diode as a semiconductor light emitting element that emits light in a blue wavelength band. Furthermore, the blue light source device 300 includes a heat sink 310 disposed on the front panel 12 side of the blue light source 301. A cooling fan 261 is disposed between the heat sink 310 and the front panel 12, and the blue light source 301 is cooled by the cooling fan 261.

  The light guide optical system 140 is a condensing lens that condenses the light bundles in the red, green, and blue wavelength bands, a dichroic mirror that converts the optical axes of the light bundles in the respective color wavelength bands into the same optical axis, etc. Consists of. Specifically, the optical axis of the blue wavelength band light emitted from the excitation light irradiation device 70 and the green wavelength band light emitted from the fluorescent wheel 101, and the optical axis of the red wavelength band light emitted from the red light source device 120 The first dichroic mirror 141 that transmits the blue and red wavelength band light, reflects the green wavelength band light, and converts the optical axis of the green light by 90 degrees toward the left panel 15 is disposed at the position where ing.

  Further, the blue wavelength band light is transmitted at a position where the optical axis of the blue wavelength band light emitted from the blue light source device 300 and the optical axis of the red wavelength band light emitted from the red light source device 120 intersect, A second dichroic mirror 148 that reflects green and red wavelength band light and converts the optical axes of the green and red light in the direction of the rear panel 13 by 90 degrees is disposed. A condensing lens is disposed between the first dichroic mirror 141 and the second dichroic mirror 148. Further, in the vicinity of the light tunnel 175, a condenser lens 173 that condenses the light source light at the entrance of the light tunnel 175 is disposed.

  The optical system unit 160 includes an illumination side block 161 located on the left side of the excitation light irradiation device 70, an image generation block 165 located near a position where the back panel 13 and the left panel 15 intersect, and a light guide optical system. The projection-side block 168 located between the 140 and the left panel 15 is configured in a substantially U-shape.

  The illumination side block 161 includes a part of the light source side optical system 170 that guides the light source light emitted from the light source unit 60 to the display element 51 provided in the image generation block 165. The light source side optical system 170 included in the illumination side block 161 includes a light tunnel 175 that uses a light beam emitted from the light source unit 60 as a light flux having a uniform intensity distribution, and a light collecting unit that collects light emitted from the light tunnel 175. There are an optical lens 178, an optical axis conversion mirror 181 that converts the optical axis of the light beam emitted from the light tunnel 175 in the direction of the image generation block 165, and the like.

  As the light source side optical system 170, the image generation block 165 includes a condenser lens 183 that condenses the light source light reflected by the optical axis conversion mirror 181 on the display element 51, and a light beam that has passed through the condenser lens 183 as a display element. And an irradiation mirror 185 that is a reflection mirror that irradiates 51 at a predetermined angle.

  The projector 10 according to the embodiment of the present invention includes a mirror fixing device 500 that can easily adjust the angle of the irradiation mirror 185. A detailed description of the mirror fixing device 500 will be described later.

  Further, the image generation block 165 includes a DMD serving as the display element 51, and a heat sink 190 for cooling the display element 51 is disposed between the display element 51 and the rear panel 13. Element 51 is cooled. Further, a condensing lens 195 as the projection-side optical system 220 is disposed in the vicinity of the front surface of the display element 51.

  The projection-side block 168 has a lens group of the projection-side optical system 220 that emits ON light reflected by the display element 51 to the screen. The projection-side optical system 220 includes a fixed lens group 225 built in a fixed lens barrel and a movable lens group 235 built in a movable lens barrel, and is a variable focus lens having a zoom function, and is movable by a lens motor. Zoom adjustment and focus adjustment can be performed by moving the lens group 235.

  FIG. 4 is an enlarged perspective view of main parts of a mirror fixing device 500 as an optical element fixing device of the projector 10 shown in FIG. 3, a display element 51 as a DMD, and the like. The projector 10 according to the embodiment of the present invention includes a mirror fixing device 500 including an irradiation mirror 185 as an optical element. The irradiation mirror 185 of the mirror fixing device 500 reflects the light emitted from the light source unit 60 and transmitted through the condenser lens 173, the light tunnel 175, the condenser lens 178, the optical axis conversion mirror 181, the condenser lens 183, and the like. The display element 51, which is a DMD, is irradiated at a predetermined angle.

  The mirror fixing device 500 of this embodiment includes a fixed frame 510 fixed to the device main body side, and an optical element support 520 as a movable member that is a mirror holder to which the irradiation mirror 185 is attached. The fixed frame 510 is fixed to the bottom panel 16 of the housing to which the cylindrical portion 220a of the projection-side optical system 220, the DMD substrate 51a to which the display element 51 as the DMD is attached, and the like are fixed. In FIG. 4, only a part of the fixed frame 510 is displayed, and other parts are not shown. As will be described later, the optical element support 520 is configured to be adjustable in angle with respect to the fixed frame 510 from the bottom surface side of the mirror fixing device 500 by a jig 600 such as a Phillips screwdriver.

  Next, the structure on the bottom side of the projector 10 will be described. FIG. 5 is a bottom view of the projector 10 according to the embodiment of the present invention. As shown in FIG. 5, a small rectangular opening 16a is formed in the bottom panel 16 of the housing of the projector 10 according to the position of the mirror fixing device 500, and a bottom panel lid 16b is screwed into the opening 16a. 801 and 801 are fixed. The opening 16a and the bottom panel lid 16b are provided to adjust the angle in the optical axis direction of the irradiation mirror 185 attached to the mirror fixing device 500 described above.

  Further, an opening 16c is formed near the center of the bottom panel 16 of the housing of the projector 10 according to the position of the excitation light irradiation device 70, and the bottom panel lid 16d is fixed to the opening 16c by screws 802 and 802. ing. The opening 16c and the bottom panel lid 16d enable maintenance of the excitation light irradiation device 70.

  FIG. 6 is a cross-sectional view of the mirror fixing device 500 of the projector 10 according to the embodiment of the present invention. The mirror fixing device 500 includes a fixed frame 510 having a lower frame 510a that is a first frame and an upper frame 510c that is a second frame arranged with a space therebetween, and a lower frame 510a and an upper frame 510c. And an optical element support 520, which is inserted into the space between which the irradiation mirror 185 as an optical element is fixed.

  The fixed frame 510 is formed of, for example, a predetermined material such as aluminum, and is fixed to the main body side of the projector 10 by a lower frame 510a in the fixed frame 510. Specifically, the fixed frame 510 is fixed to the bottom panel 16 of the housing of the projector 10 via, for example, an intermediate member 560.

  In the present embodiment, the fixed frame 510 is formed in a U-shaped cross section. Specifically, the fixed frame 510 includes a flat lower frame 510a as a first frame, a flat side frame 510b extending vertically upward from an end of the lower frame 510a, and an upper end of the side frame 510b. A flat plate-like upper frame 510c as a second frame extending horizontally from the portion. In the present embodiment, the lower frame 510a and the upper frame 510c are formed in parallel flat plate shapes, and the surfaces facing each other are parallel surfaces.

  In the present embodiment, the lower frame 510a and the side frame 510b are integrally formed. The upper frame 510c is detachably fixed to the upper end of the side frame 510b by a fixing member 513 such as a screw. The optical element support 520 is sandwiched between the lower frame 510a and the upper frame 510c.

  The lower frame 510a has a spherical concave portion 510g having a smooth surface. The spherical concave portion 510g has a center of curvature as the center of curvature 580 of the movable support portion 520a as the upper supported portion where the optical element support 520 is supported by the upper frame 510c, and the radius of curvature of the spherical support portion 520c. And substantially the same radius of curvature. That is, the spherical concave portion 510g functions as a lower support portion 510f that supports the spherical surface support portion 520c having a smooth surface formed in a convex shape on the lower side of the optical element support body 520.

  In the center of the spherical recess 510g, the spherical recess 510g penetrates the outer surface of the lower frame 510a, and has an inner diameter larger than the outer diameter of the projection 520k of the optical element support 520, and accommodates this projection 520k. A hole 510h is formed.

  The hole 510h and the protrusion 520k of the optical element support 520 regulate the moving range in which the optical element support 520 swings. By restricting the movement range of the optical element support 520 to a predetermined range, it is possible to prevent problems such as the irradiation mirror 185 coming into contact with the fixed frame 510 and being damaged during angle adjustment.

  The hole 510h of the lower frame 510a is provided with a fixing member 530 that fixes the positional relationship between the optical element support 520 and the fixing frame 510 after the angle adjustment. Specifically, the fixing member 530 prevents the protrusion 520k of the optical element support 520 housed in the hole 510h from moving. The fixing member 530 is, for example, an adhesive that is filled in the hole 510h and cured.

  In the present embodiment, a gap is formed between the side frame 510b and the optical element support 520. For example, the gap is set to such a size that the optical element support 520 does not come into contact with the fixed frame 510 when it moves.

  The upper frame 510c functions as an upper support portion 510e that supports the upper portion of the optical element support 520. In the present embodiment, a recess 510d is formed in the upper frame 510c. The recess 510d receives a protrusion 520d formed at the upper end of the optical element support 520. That is, the protrusion 520d is slidably fitted into the recess 510d.

  The optical element support 520 has a movable support portion 520a supported on the upper surface 510c that is the second frame so as to be swingable and rotatable on the upper surface that intersects the surface to which the irradiation mirror 185 that is the optical element is fixed. Prepare.

  The movable support portion 520a of the optical element support 520 has a protruding portion 520d having a hemispherical tip and a convex shape. The curvature radius of the curved surface of the protrusion 520d of the optical element support 520 is that of the curved surface of the concave portion 510d of the upper frame 510c with the center of curvature 580 located near the top of the optical element support 520 as the center of curvature. It is comprised so that it may become substantially the same as a curvature radius.

  In addition, as described above, the radius of curvature of the curved surface of the spherical surface support portion 520c of the optical element support 520 has the center of curvature at the center of curvature (rotation center) 580 located near the upper portion of the optical element support 520 as the lower frame. The curvature radius of the curved surface of the spherical recess 510g of 510a is configured to be substantially the same.

  The movable support portion 520a of the optical element support 520 is not limited to the above form. For example, the movable support portion 520a is formed by a projecting portion 520d having a sharp conical tip, and is formed on the upper frame 510c. May be formed with a curved recess for receiving the movable support portion 520a.

  The optical element support 520 is formed of a predetermined material such as aluminum, and is formed in a substantially rectangular parallelepiped. Convex-shaped portions are formed on the upper and lower portions of the substantially rectangular parallelepiped, and are sandwiched between the upper frame 510c and the lower frame 510a.

  The optical element support 520 is opposed to the surface having the movable support portion 520a and the movable support portion 520a provided with the protruding portion 520d convex upward, which is supported by the concave portion 510d of the upper frame 510c of the fixed frame 510. A spherical support portion 520c as a lower supported portion 520b projecting in a spherical shape centering on the center of curvature of the swing center 580 of the movable support portion 520a on the lower surface which is a surface, and formed on a part of the spherical support portion 520c And a protrusion 520k. The protrusion 520k is configured to loosely fit into a hole 510h formed in the spherical recess 510g of the lower frame 510a.

  In addition, an inclined surface as an optical element mounting portion 520e is formed on the side surface of the optical element support 520 that intersects the upper surface and the lower surface on which the movable support portion 520a and the spherical support portion 520c are provided, and an irradiation mirror is formed on the inclined surface. 185 is attached.

  An engaging operation portion 520m with which the adjustment jig 600 is engaged is formed at the tip of the protrusion 520k. The engagement operation portion 520m is formed in a hollow shape or a protruding shape. Further, the engagement operation portion 520m is, for example, a single line or a cross shape passing through the center of the tip of the protrusion 520k, and further a hexagon, a star-shaped depression or a protrusion shape centering on the center of the tip of the protrusion 520k. Either of them may be used. In the present embodiment, it is assumed that a cross-shaped groove portion that engages the tip portion 601 of the plus driver of the jig 600 is formed as the engagement operation portion 520m of the projection portion 520k.

  Further, as described above, the bottom panel 16 of the housing of the projector 10 has an opening in accordance with the positions of the hole 510h of the lower frame 510a of the mirror fixing device 500 and the protrusion 520k of the optical element support 520. A portion 16a is formed, and a bottom panel lid 16b is fixed to the opening 16a with screws 801 and 801. When the angle of the irradiation mirror 185 is adjusted, the opening 16a and the bottom panel lid 16b are removed from the screws 801 and 801 and the bottom panel lid 16b, the hole 510h of the lower frame 510a, and the protrusion 520k of the optical element support 520. Are exposed, the angle is adjusted, and an adhesive is applied and fixed, and then the screws 801 and 801 and the bottom panel lid 16b are attached.

  An example of a manufacturing method of the mirror fixing device 500 that is the above-described optical element fixing device will be described. In the initial state, the upper frame 510c is not attached to the lower frame 510a.

  First, the irradiation mirror 185 as an optical element is fixed to the inclined surface of the optical element mounting portion 520e of the optical element support 520 with an adhesive or the like.

  Next, the projection 520k on the lower surface side of the optical element support 520, to which the above-described irradiation mirror 185 is attached, is inserted into the lower frame 510a, and the hole 510h of the lower frame 510a is inserted into the lower frame 510a. The spherical support portion 520c on the side and the spherical concave portion 510g of the lower frame 510a are disposed so as to contact each other.

  Next, the upper frame 510c is attached to the side frame 510b so that the recess 510d of the upper frame 510c is fitted to the protrusion 520d of the movable support 520a of the optical element support 520, and the fixing member 513 such as a screw is used. The upper frame 510c is fixed to the side frame 510b.

  Next, a method for adjusting the mirror fixing device 500 of the projector 10 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a flowchart showing an example of a method for adjusting the mirror fixing device 500 of the projector 10. 8 and 9 are diagrams illustrating an example of a method for adjusting the angle of the irradiation mirror 185 of the mirror fixing device 500. FIG. 8 and 9, the bottom panel 16, the bottom panel lid 16b, the screw 801, and the intermediate member 560 are not shown.

  First, the mirror fixing device 500 that is an optical element fixing device is fixed to the projector 10 that is an optical device. Specifically, the mirror fixing device 500 is fixed to the bottom panel 16 that is the bottom plate of the projector 10 by the lower frame 510a that is the first frame. As shown in FIG. 5, an opening 16a is formed in the bottom panel 16 of the projector 10 at a position corresponding to the hole 510h of the lower frame 510a.

  Next, with the bottom panel lid 16b and the screw 801 removed from the bottom panel 16, a jig 600 such as a Phillips screwdriver is engaged with the engagement operation portion 520m at the tip of the projection 520k, and the irradiation mirror 185 Adjust the angle. The angle of the irradiation mirror 185 is adjusted, for example, so that the illuminance of the image projected from the projector 10 onto the screen becomes an optimal value.

  Specifically, in step S101, the optical element support 520 is rotated by operating the protrusion 520k to rotate about the rotation shaft 581 of the protrusion 520k. Specifically, as shown in FIGS. 8 and 9, the engagement operation portion 520 m formed on the tip portion 601 of the jig 600 such as a Phillips screwdriver is used to engage the protrusion portion 520 k of the optical element support 520. The optical element support 520 is rotated around the rotation axis by rotating the jig 600 clockwise or counterclockwise with the portion 520m engaged.

  In step S105, the optical element fixed to the optical element support 520 is moved by swinging the axis that is the rotation shaft 581 of the protrusion 520k so that the protrusion 520k moves in the hole 510h of the lower frame 510a. Angle adjustment for changing the optical axis direction of a certain irradiation mirror 185 is performed. At this time, the lower spherical support portion 520c of the optical element support 520 slides with respect to the spherical recess 510g of the lower frame 510a.

  By the above steps S101 and S105, the protrusion 520k of the optical element support 520 is attached to the optical element support 520 by rotating about the rotation axis 581 or by swinging the axis that is the rotation axis 581. The angle of the irradiation mirror 185 can be adjusted. Note that the order of steps S101 and S105 may be reversed, and adjustments of steps S101 and S105 may be appropriately performed until the illuminance reaches an optimum value.

  Next, in step S110, when the angle adjustment of the irradiation mirror 185 is completed, the optical element support 520 is fixed by a fixing member 530 such as an adhesive. Specifically, the hole 510h of the lower frame 510a is filled with an adhesive, and after a predetermined time has elapsed, the adhesive is cured, whereby the position of the protrusion 520k of the optical element support 520 is fixed by the fixing member 530. Secure against 510a.

  In the above embodiment, the protrusion 520d is formed on the movable support portion 520a of the optical element support 520 of the mirror fixing device 500, and the recess 510d is formed on the upper frame 510c, but this is not a limitation. Absent. For example, as shown in FIG. 10, a convex portion 510p is formed on the upper frame 510c, a concave portion 520p is formed on the movable support portion 520a of the optical element support 520, and the convex portion 510p is formed on the concave portion 520p. The upper frame 510c may be configured to support the upper surface of the optical element support 520 by being slidably fitted.

  Further, in the above embodiment, the plus-shaped groove portion with which the tip end portion of the jig 600 is engaged is formed as the engagement operation portion 520m at the lower end portion of the projection 520k of the optical element support 520. However, the present invention is not limited to this form. For example, as shown in FIG. 10, a plus-shaped protrusion may be formed as an engagement operation portion 520 m at the tip of the lower end side of the protrusion 520 k of the optical element support 520. At this time, the angle adjustment of the optical element support 520, that is, the angle adjustment of the irradiation mirror 185 is performed using the jig 600 in which a plus-shaped groove portion is formed at the tip portion 601. Further, the shape of the engagement operation portion 520m is not limited to the above-described shape, and various shapes may be employed. As described above, the engagement operation portion 520m is a single line or cross-shaped groove or plate-like protruding shape passing through the center of the tip of the protrusion 520k, and further a hexagon centered at the center of the tip of the protrusion 520k. It may be either a star-shaped depression or a protruding shape.

  In the above embodiment, after the angle adjustment, the hole 510h of the lower frame 510a is filled with a fixing member 530 such as an adhesive to fix the position of the protrusion 520k of the optical element support 520 to the lower frame 510a. However, it is not limited to this form. After the angle adjustment, for example, as shown in FIG. 10, a set screw 531 as a fixing member is inserted from the lower side of the lower frame 510a, and the tip end of the set screw 531 is a spherical surface support portion 520c of the optical element support 520. The optical element support 520 may be fixed to the lower frame 510a by abutting against and pressing. Thus, the optical element support 520 can be easily fixed to the lower frame 510a by the set screw 531. Further, by loosening the set screw 531, the angle of the optical axis of the irradiation mirror 185 can be easily adjusted again.

  Further, the support structure of the optical element support 520 and the upper frame 510c is not limited to the above form. For example, as shown in FIG. 11A, the movable support portion 520a of the optical element support 520 is formed by a projecting portion 520d having a sharp conical tip, and the upper frame 510c, which is the second frame, A curved recess 510d that receives the movable support 520a may be formed. Thus, if the tip of the protrusion 520d has a sharp conical shape, the frictional resistance between the optical element support 520 and the upper frame 510c is reduced during angle adjustment, and the angle of the irradiation mirror 185 can be adjusted more easily. It can be carried out.

  Further, as shown in FIG. 11B, the movable support portion 520a of the optical element support 520 is formed by a protrusion 520d having a hemispherical tip, and the upper frame 510c has a larger curvature than the protrusion 520d. A concave portion 510d having a curved shape with a radius and a smooth surface may be formed. By adopting such a configuration, it is possible to reduce the frictional resistance between the optical element support 520 and the upper frame 510c, and to reduce the angle shift due to the external force of the optical element support 520 with respect to the upper frame 510c.

  Also, as shown in FIG. 11C, the movable support portion 520a of the optical element support 520 is formed by a protruding portion 520d whose tip is hemispherical, and a groove-shaped recess 510d is formed in the upper frame 510c. May be. By adopting such a configuration, it is possible to further reduce the angle shift due to the external force of the optical element support 520 with respect to the upper frame 510c.

  Further, as shown in FIGS. 11A, 11B, and 11C, the optical element support 520 has a convex shape and the upper frame 510c has a concave shape. The support 520 may have a concave shape, and the upper frame 510c may have a convex shape.

  Further, in the above-described embodiment, the optical element support 520 has the protrusion 520k on a part of the spherical support 520c, and the engagement operation part 520m having a depression or a protrusion is formed at the tip of the protrusion 520k. However, it is not limited to this form. For example, as shown in FIG. 12, the engaging operation portion 520m may be provided on a part of the spherical support portion 520c without providing the projection portion 520k on the spherical support portion 520c. At this time, the hole 510h of the first frame 510a is configured to penetrate from the spherical recess 510g to the outer surface of the first frame 510a and have an inner diameter larger than the outer shape of the engagement operation portion 520m.

  The mirror fixing device 500 as the optical element fixing device described above includes the engaging operation portion 520m directly on the spherical support portion 520c without providing the projection portion 520k on the spherical support portion 520c. The angle of the irradiation mirror 185 as an element can be adjusted.

  In the above embodiment, the opening 16a is formed in the bottom panel 16 of the projector 10 in accordance with the position of the mirror fixing device 500. However, the present invention is not limited to this form. For example, the bottom panel 16 may be provided with a single hole having a size that allows the tip 601 of the jig 600 to be inserted in accordance with the position of the mirror fixing device 500.

  In the present embodiment, the mirror fixing device 500 using the irradiation mirror 185 as an optical element has been described as the optical element fixing device. However, the present invention is not limited to this embodiment. For example, a reflection mirror, a half mirror, a laser element, or the like may be employed as the optical element, and the angle of the optical axes may be adjusted.

  As described above, according to the embodiment of the present invention, the mirror fixing device 500 as the optical element fixing device includes the lower frame 510a and the second frame which are the first frames arranged with a space therebetween. A fixed frame 510 provided with a certain upper frame 510c, and an optical element support 520 that is inserted into a space between the lower frame 510a and the upper frame 510c and to which the irradiation mirror 185 that is an optical element is fixed, The optical element support 520 includes a movable support portion 520a that is supported so as to be swingable and rotatable with respect to the upper frame 510c, which is the second frame, on a surface that intersects the surface on which the irradiation mirror 185 is fixed. The 520 can be easily swung and rotated. Then, a spherical support portion 520c protruding in a spherical shape with the center of curvature of the swing center 580 of the movable support portion 520a is provided on a surface facing the surface having the movable support portion 520a, and a part of the spherical support portion 520c The lower frame 510a has the same center of curvature as the center of curvature of the movable support portion 520a in which the optical element support 520 is supported by the upper frame 510c, and the same radius of curvature as that of the spherical support portion 520c. A hole having a spherical concave portion 510g having a radius of curvature, and having a larger inner diameter than the outer shape of the engaging operation portion 520m, penetrating from the spherical concave portion 510g to the outer surface of the lower frame 510a at the center of the spherical concave portion 510g. Since the portion 510h is provided, the spherical support portion 520c provided with the engagement operation portion 520m can be slid and rotated along the spherical concave portion 510g to change the orientation of the optical element support 520 stably.

Therefore, a mirror fixing device 500 as an optical element fixing device capable of easily adjusting the angle of the irradiation mirror 185 with the jig 600 with a simple configuration, and a mirror supported by the optical element fixing device are provided. The projector 10 can be provided.
Moreover, it can be set as the structure which can perform angle adjustment correctly by making a curvature center and a curvature radius appropriate.

  Further, in the embodiment of the present invention, after fixing the mirror fixing device 500 as the optical element fixing device to the projector 10 as the optical device, the jig 600 is engaged with the engagement operation portion 510k, and the engagement operation portion An optical element fixed to the optical element support 520 by rotating the optical element support 520 by rotating it about 510k and moving the engagement operation portion 510k within the hole 510h. Since the angle adjustment for changing the optical axis direction of the irradiation mirror 185 is performed, the angle of the irradiation mirror 185 can be easily adjusted. An angle adjustment method can be provided.

  Further, in the embodiment of the present invention, the lower frame 510a as the first frame and the upper frame 510c as the second frame have mutually parallel surfaces as parallel planes, and are formed in parallel flat plate shapes. Therefore, the mirror fixing device 500 having the above configuration can be easily manufactured. Since the upper frame 510c has a structure that is detachably fixed to the upper portion of the side frame 510b by a fixing member 513 such as a screw, the optical element support 520 is attached to the lower frame 510a and the upper frame 510c at the time of manufacturing the apparatus. The optical element support 520 can be easily disposed between them.

  In addition, according to the embodiment of the present invention, the engagement operation portion 520m is provided on the surface of the spherical support portion 520c with a single line or cross-shaped groove having a length shorter than the diameter of the hole portion 510h. Since it is either a plate-like protruding shape, or a hexagonal shape or a star-shaped depression or protruding shape that is smaller than the diameter of the hole 510h, a jig corresponding to the engagement operation portion 520m Using 600, the angle of the optical axis of the irradiation mirror 185 can be easily adjusted.

  In addition, according to the embodiment of the present invention, the engagement operation portion 520m is provided at the tip of the rod-like projection portion that protrudes from the spherical support portion 520c and has a diameter smaller than the diameter of the hole portion. The jig 600 corresponding to the engagement operation portion 520m can be used to easily adjust the angle of the optical axis of the irradiation mirror 185, and the movable range of the optical element support 520 can easily correspond to the hole. It can be limited to a range.

  Further, in the embodiment of the present invention, the engagement operation portion 520m is rotated or moved to change the optical axis direction of the irradiation mirror 185, and then bonded to the hole portion 510h of the lower frame 510a that is the first frame. Since the position of the spherical support portion 520c is fixed to the lower frame 510a by the fixing member 530 that is filled and hardened with the agent, the angle of the irradiation mirror 185, which is an optical element, can be adjusted with high accuracy with a simple configuration. In this state, it is possible to provide a mirror fixing device 500 that can be maintained for a long time, and a method of adjusting the angle of the irradiation mirror 185 in the mirror fixing device 500. In addition, by using an adhesive such as an ultraviolet curable resin or a thermosetting resin as the fixing member 530, the position of the protrusion 520k can be fixed to the lower frame 510a easily in a short time.

  Further, in the embodiment of the present invention, the movable support portion 520a of the optical element support 520 is formed by a protruding portion 520d having a hemispherical tip, and the upper frame 510c is formed with a recess 510d that receives the movable support portion 520a. Since the recess 510d and the protrusion 520d slide during the mirror angle adjustment, a small frictional resistance is provided between the recess 510d and the protrusion 520d, and the mirror angle can be easily adjusted. Can be provided, and a method of adjusting the angle of the irradiation mirror 185 in the mirror fixing device 500 can be provided.

  In the modification of the embodiment of the present invention, the movable support portion 520a of the optical element support 520 is formed by a projecting portion 520d having a sharp cone at the tip, and the movable support portion 520a is provided on the upper frame 510c. Since the curved concave portion 510d to be received is formed, the mirror fixing device 500 capable of easily adjusting the angle of the mirror with a small frictional resistance between the concave portion 510d and the protruding portion 520d and with less wear. And a method of adjusting the angle of the irradiation mirror 185 in the mirror fixing device 500 can be provided.

  In addition, according to the embodiment of the present invention, the optical element support 520 has an optical element so that the curvature radius of the lower spherical support part 520c is substantially the same as the curvature radius of the spherical concave part 510g of the lower frame 510a. Since the support body 520 and the lower frame 510a are formed, the optical element support body 520 can slide smoothly with respect to the lower frame 510a, and the angle can be easily adjusted.

  Further, according to the embodiment of the present invention, the swing center (rotation center) 580 that is the center of curvature of the sliding surface of the spherical support 520c on the lower side of the optical element support 520 and the upper side of the optical element support 520 are provided. Since the center of rotation (rotation center) 580, which is the center of curvature of the sliding surface of the protruding portion 520d, is configured to be substantially the same, the optical element support 520 is attached to the lower frame 510a and the upper frame 510c. On the other hand, it can slide smoothly and the angle can be adjusted easily.

  Further, since the present invention is applied to the mirror fixing device 500 that employs the reflection mirror irradiation mirror 185 as an optical element, the angle adjustment of the optical axis of the irradiation mirror 185 can be easily performed with high accuracy. Further, the optical element is not limited to the reflection mirror. For example, a light source such as a half mirror or a laser element may be employed as the optical element.

  Further, according to the embodiment of the present invention, the excitation light irradiation device 70 that is an optical device, the light source side optical system 170 that guides and emits the light from the light source device to the display element 51, and the light from the light source device is optical. A display element 51 that forms an image, a projection-side optical system 220 that projects an optical image formed by the display element 51 on a screen, and a control unit 38 that is a projector control means for controlling the light source device and the display element 51. The light source side optical system 170 includes at least a lens and a mirror, and an irradiation mirror 185 that is a reflection mirror held by a mirror fixing device 500 that is an optical element fixing device from an excitation light irradiation device 70 that is a light source device. Since the display element 51 is irradiated with light, the angle of the irradiation mirror 185 can be easily adjusted, and the projector 10 that can easily achieve the optimum illuminance can be provided.

  Further, according to the embodiment of the present invention, the hole 510h formed in the spherical recess 510g of the lower frame 510a of the mirror fixing device 500 and the spherical support 520c formed on the lower side of the optical element support 520 are provided on the lower surface. Since the mirror fixing device 500 is disposed inside the opening 16a provided on the bottom surface of the projector 10, the mirror fixing device 500 can be easily attached to the mirror fixing device 500 from the bottom surface side of the projector 10 using a jig such as a Phillips screwdriver. The projector 10 that can adjust the angle can be provided. In the present embodiment, the opening 16 and the bottom panel lid 16b provided on the bottom surface of the projector 10 can be formed relatively small.

  Further, the mirror fixing device 500 that is an optical element fixing device is fixed to the bottom panel 16 that is a bottom plate of the projector 10 by a lower frame 510a that is a first frame, and the lower frame 510a is fixed to the bottom panel 16 of the projector 10. Since the opening 16a is formed at a position corresponding to the hole 510h, the angle of the irradiation mirror 185, which is an optical element, is accommodated in the hole 510h of the lower frame 510a from the bottom side of the projector 10 when adjusting the angle. By engaging the tip 601 of the jig 600 with the protrusion 520k and rotating the protrusion 520k or swinging the axis of the protrusion 520k as described above, the angle of the irradiation mirror 185 can be easily adjusted. It can be performed.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

The invention described in the first claim of the present application will be appended below.
[1] A fixed frame having a first frame and a second frame arranged with a space between them, and inserted in a space between the first frame and the second frame to support an optical element An optical element support as a movable member,
The optical element support includes a movable support that is supported so as to swing and rotate with respect to the second frame, and a spherical support that protrudes in a spherical shape on a surface that faces the surface having the movable support. And having an engaging operation part in a part of the spherical support part,
The first frame includes a spherical recess for supporting the spherical support portion, and penetrates from the spherical recess to the outer surface of the first frame at the center of the spherical recess, from the outer shape of the engagement operation portion. An optical element fixing device comprising a hole having a large inner diameter.
[2] The spherical support portion has a spherical shape with the center of curvature as the center of curvature of the movable support portion,
2. The optical element fixing device according to claim 1, wherein the spherical concave portion has a center of curvature as a center of curvature of the movable support portion, and has substantially the same radius of curvature as the radius of curvature of the spherical support portion.
[3] The optical element fixing device according to claim 1 or 2, wherein the first frame and the second frame have parallel planes facing each other.
[4] The optical element fixing device according to any one of claims 1 to 3, wherein the first frame and the second frame are formed in a parallel flat plate shape.
[5] The engagement operation part is provided on the surface of the spherical support part, and is a single line or a cross-shaped groove or a plate-like protruding shape having a length shorter than the diameter of the hole part, The optical element fixing device according to any one of claims 1 to 4, wherein the optical element fixing device is any one of a hexagonal shape, a star-shaped depression, or a protruding shape having an outer shape smaller than a diameter of the hole portion.
[6] The optical device according to [5], wherein the engagement operation portion is provided at a tip of a rod-like projection portion protruding from the spherical support portion and having a diameter smaller than the diameter of the hole portion. Element fixing device.
[7] The optical element fixing device according to any one of [1] to [6], wherein the first frame further includes a fixing member that prevents the spherical support portion from moving.
[8] The optical element fixing device according to [7], wherein the fixing member is an adhesive that fills and cures the hole.
[9] The movable support portion of the optical element support is formed by a protrusion having a hemispherical tip, and the second frame has a recess for receiving the movable support portion. The optical element fixing device according to any one of claims 1 to 8.
[10] The movable support portion of the optical element support is formed by a projecting portion having a sharp conical tip, and a curved concave portion for receiving the movable support portion is formed on the second frame. The optical element fixing device according to any one of claims 1 to 8, wherein the optical element fixing device is provided.
[11] The optical element fixing device according to any one of [1] to [10], wherein the optical element is a reflection mirror.
[12] a light source device;
A light source side optical system for guiding light from the light source device to a display element;
A display element that forms an optical image with light from the light source device;
A projection-side optical system that projects an optical image formed by the display element onto a screen;
Projector control means for controlling the light source device and the display element,
The projector according to claim 11, wherein the light source side optical system includes the optical element fixing device according to claim 11.
[13] The optical element fixing device is fixed to the bottom panel of the projector by the first frame, and an opening is formed in the bottom panel of the projector at a position corresponding to the hole of the first frame. The projector according to claim 12.
[14] An angle adjustment method of an optical element by the optical element fixing device according to any one of claims 1 to 11,
After fixing the optical element fixing device to an optical apparatus, a jig is engaged with the engagement operation part, and the optical element support is rotated by operating to rotate about the engagement operation part, An optical element fixing device that adjusts an angle to change an optical axis direction of the optical element fixed to the optical element support so as to move the engagement operation part in the hole. The angle adjustment method of the optical element by the method.
[15] After rotating or moving the engagement operation portion to change the optical axis direction of the optical element, the hole portion of the first frame is filled with an adhesive, and the spherical support portion is The position is fixed, The angle adjustment method of the optical element by the optical element fixing device of Claim 14 characterized by the above-mentioned.
[16] The angle adjustment method of an optical element by the optical element fixing device according to [14] or [15], wherein the optical element is a reflection mirror.
[17] The angle adjustment method for an optical element by the optical element fixing device according to any one of [14] to [16], wherein the optical device is a projector.

DESCRIPTION OF SYMBOLS 10 Projector 11 Top panel 12 Front panel 13 Rear panel 14 Right panel 15 Left panel 16 Bottom panel 16a Opening part 16b Bottom panel cover 16c Opening part 16d Bottom panel cover 17 Exhaust hole 18 Intake hole 19 Lens cover 20 Various terminals 21 Input / output connector Unit 22 input / output interface 23 image conversion unit 24 display encoder 25 video RAM
26 display drive unit 31 image compression / decompression unit 32 memory card 35 Ir reception unit 36 Ir processing unit 37 key / indicator unit 38 control unit 41 light source control circuit 43 cooling fan drive control circuit 45 lens motor 47 audio processing unit 48 speaker 51 display Element 51a DMD substrate 60 Light source unit 70 Excitation light irradiation device (light source device) 71 Excitation light source (light source element)
73 collimator lens 75 reflecting mirror group 78 condensing lens 81 heat sink 100 fluorescent light emitting device 101 fluorescent wheel 110 wheel motor 111 condensing lens group 120 red light source device 121 red light source 125 condensing lens group 130 heat sink 140 light guide optical system 141 first Dichroic mirror 148 Second dichroic mirror 160 Optical system unit 161 Illumination side block 165 Image generation block 168 Projection side block 170 Light source side optical system 173 Condensing lens 175 Light tunnel 178 Condensing lens 181 Optical axis conversion mirror 183 Condensing lens 185 Irradiation Mirror (optical element, reflection mirror)
190 heat sink 195 condensing lens 220 projection side optical system 220a cylindrical portion 225 fixed lens group 235 movable lens group 241 control circuit board 261 cooling fan 300 blue light source device 301 blue light source 305 condensing lens group 310 heat sink 500 mirror fixing device (light source) Element fixing device)
510 fixed frame 510a lower frame (first frame)
510b side frame 510c upper frame (second frame)
510d Concave portion 510e Upper support portion 510f Lower support portion 510g Spherical concave portion 510h Hole portion 510p Convex shape portion 513 Fixing member (screw)
520 Optical element support (mirror holder, movable member)
520a Movable support part (upper supported part)
520b Lower supported portion 520c Spherical support portion 520d Protruding portion (upper convex shape portion) 520e Optical element attaching portion 520k Protruding portion (rod-like protruding portion) 520m Engagement operation portion 520p Concave shape portion 530 Fixing member (adhesive)
531 Set screw (fixing member) 560 Intermediate member 580 Oscillation center (rotation center) 581 Rotating shaft 600 Jig (adjustment jig: driver) 601 Tip 801 Screw 802 Screw

Claims (17)

As a movable frame that is inserted into a space between the first frame and the second frame and supports the optical element, and a fixed frame having a first frame and a second frame arranged with a space between them An optical element support of
The optical element support includes a movable support that is supported by the second frame so as to swing and rotate about a swing center ;
A spherical support portion protruding in a spherical shape on a surface facing the surface having the movable support portion, and an engaging operation portion on a part of the spherical support portion,
The first frame includes a spherical recess for supporting the spherical support portion, and penetrates from the spherical recess to the outer surface of the first frame at the center of the spherical recess, from the outer shape of the engagement operation portion. An optical element fixing device comprising a hole having a large inner diameter . The spherical support portion has a spherical shape with the center of curvature as the center of oscillation of the movable support portion,
2. The optical element fixing device according to claim 1 , wherein the spherical concave portion has the same center of curvature as the center of curvature of the movable support portion and the same radius of curvature as that of the spherical support portion. 3. The optical element fixing device according to claim 1, wherein the first frame and the second frame have parallel planes facing each other. The optical element fixing device according to any one of claims 1 to 3 , wherein the first frame and the second frame are formed in a parallel flat plate shape. The engagement operation portion is provided on the surface of the spherical support portion, and is a single line having a length shorter than the diameter of the hole, a cross-shaped groove or a plate-like protruding shape, and further, hexagons are smaller outer diameter than, or optical element fixing device according to any one of claims 1 to 4, characterized in that either star-shaped recess or protrusion shape. 6. The optical element fixing device according to claim 5 , wherein the engaging operation portion is provided at a tip end of a rod-like projection portion that protrudes from the spherical support portion and has a diameter smaller than the diameter of the hole portion. . The optical element fixing device according to any one of claims 1 to 6 , wherein the first frame further includes a fixing member that prevents the spherical support portion from moving. The optical element fixing device according to claim 7 , wherein the fixing member is an adhesive that fills and cures the hole. The movable support portion of the optical element support body is formed by a projecting portion having a hemispherical tip, and the second frame has a recess for receiving the movable support portion. The optical element fixing device according to any one of claims 1 to 8 . The movable support portion of the optical element support is formed by a projecting portion having a sharp conical tip, and a curved concave portion for receiving the movable support portion is formed on the second frame. optical element fixing device according to any one of claims 1 to 8, characterized. The optical element, the optical element fixing device according to any one of claims 1 to 10, characterized in that a reflecting mirror. A projector comprising the optical element fixing device according to claim 11 . The optical element fixing device is fixed to the bottom panel of the projector by the first frame, and an opening is formed in the bottom panel of the projector at a position corresponding to the hole of the first frame. The projector according to claim 12 . An angle adjustment method of an optical element by the optical element fixing device according to any one of claims 1 to 11 ,
After fixing the optical element fixing device to an optical apparatus, a jig is engaged with the engagement operation part, and the optical element support is rotated by operating to rotate about the engagement operation part, An optical element fixing device that adjusts an angle to change an optical axis direction of the optical element fixed to the optical element support so as to move the engagement operation part in the hole. The angle adjustment method of the optical element by the method. After rotating or moving the engagement operation portion to change the optical axis direction of the optical element, the hole portion of the first frame is filled with an adhesive to fix the position of the spherical support portion. The angle adjustment method of the optical element by the optical element fixing device according to claim 14 . 16. The method of adjusting an angle of an optical element by an optical element fixing device according to claim 14, wherein the optical element is a reflection mirror. Angle adjusting method of an optical element according to the optical element fixing device according to any one of claims 14 to 16, wherein said optical apparatus is a projector.

Images