JP2010134298A - Optical device and projection type video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical device for protecting a resin-made case by making a pressure contact member of the optical device have a function of shielding light, and provide a projection type video display device using the optical device. <P>SOLUTION: This optical device includes an integrator lens 14 on a light path. The resin-made case of the optical device includes grooves 646 and 649 into which the integrator lens 14 is inserted. The integrator lens 14 is gripped by the pressure contact members 641a and 641b arranged between the grooves 646 and 649 and the integrator lens 14. The pressure contact members 641a and 641b are extended so as to cover the resin on the more upstream side of the optical path than the integrator lens 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical device and a projection display apparatus using the same, and more particularly to a housing structure of an optical system.

  In an optical system (optical device) of a projection display apparatus such as a liquid crystal projector, a light source emits light at a high temperature and precision is required. Therefore, a housing for housing various optical components includes a lid. A heat-resistant resin with little heat shrinkage is used as a whole.

  On the other hand, fixing various optical components requires secure fixing without backlash, but optical components have dimensional tolerances. However, heat-resistant resins with low heat shrinkage generally do not have elasticity, and heat-resistant resins without elasticity absorb dimensional tolerances and it is difficult to fix optical components. It was often fixed (see, for example, Patent Document 1).

However, if the light source is tilted and attached for some reason, the optical path tilts, so not only the optical component on the optical path but also the heat-resistant resin near the optical component mounting part formed for mounting the optical component In addition, excessive heat is applied for a long time, the optical component mounting portion is damaged, and the optical component cannot be securely fixed. In particular, the phenomenon appears remarkably in the integrator lens mounting portion closest to the light source.
JP 2003-287814 A

  However, the above-described configuration requires a large number of separate parts (elastic members) for absorbing and fixing the dimensional tolerances of the optical parts. As a result, the number of parts increases, man-hours increase, and the use of a heat-resistant resin with a high cost increases the cost significantly. Further, particularly in the vicinity of the light source, the heat-resistant resin may be exposed to excessive heat for a long time, the optical component is damaged, and the optical component cannot be reliably fixed.

  Therefore, the present invention has been made to solve such problems. That is, it is an object of the present invention to provide an optical device and a projector device using the optical device that can securely fix an optical component without increasing the number of components and can protect a resin casing. is there.

  One embodiment of the present invention relates to an optical device. This optical device is an optical device having an integrator lens on the optical path, and a resin casing of the optical device is provided with a groove into which the integrator lens is inserted, and the integrator lens is disposed between the groove and the integrator lens. In addition, the pressure contact member is extended so as to cover the resin on the upstream side of the optical path from the integrator lens.

  According to the present invention, the integrator can be fixed and the housing can be protected by using the pressure contact member.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a liquid crystal projector which is an embodiment of a projection display apparatus according to the present invention, and FIG. 2 is a perspective view showing the upper case removed.

  As shown in FIG. 1, a main body case 2 that forms the outline of the liquid crystal projector 1 includes an upper case 2a and a lower case 2b. When the upper case 2a is removed, the inside appears as shown in FIG.

  A projection window 4 through which the projection lens 3 is exposed is formed at the center of the front surface of the main body case 2. A maintenance opening 5 is formed at the center of the upper surface of the main body case 2, and a lid 6 that can be opened and closed is provided in the maintenance opening 5. A projection lens removal button 7 that is operated when removing the projection lens 3 is exposed on the front side of the maintenance opening 5, and an operation display unit 8 is provided on the left side. Further, a cooling vent 9 is formed on the right rear side surface. In addition, leg portions 10 and 10 that are height-adjustable are provided on both side ends of the bottom front end portion.

As shown in FIG. 2, a light source device 11 is disposed in the right rear portion when viewed from the front side, and an optical system 12 extending from the light source device 11 to the projection lens 3 is disposed in the main body case 2. Yes. In the vicinity of the light source device 11, cooling fans 13 and 13 for cooling the light source device 11 and other required cooling parts are provided facing the vent hole 9 shown in FIG. FIG. 3 is a diagram illustrating a configuration example of the optical system 12. The optical system 12 is not limited to that shown in FIG. 3, and the present invention can be applied to various optical systems.

  In FIG. 3, the white light from the light source device 11 passes through the first integrator lens 14, the diaphragm mechanism 15, the second integrator lens 16, the slit plate 17, the polarization beam splitter 18, the condenser lens (condensing lens) 19, and the like. It is guided to the first dichroic mirror 20.

  The first integrator lens 14 and the second integrator lens 16 are composed of heat-resistant glass fly-eye lenses formed by arranging a plurality of cells in a matrix, and uniformize the illuminance distribution of white light emitted from the light source device 11. It has a function. The slit plate 17 is made of an aluminum thin plate and has a function of blocking unnecessary incident light to the polarization beam splitter 18. The polarization beam splitter 18 is a component wave of one of the P wave and S wave of light. It has a function to extract only.

  The light passing through the polarization beam splitter 18 passes through the condenser lens 19 and reaches the first dichroic mirror 20. The first dichroic mirror 20 has a function of reflecting only the blue component of light and passing the red and green components, and the second dichroic mirror 21 reflects the green component of light and allows the red component to pass. It has a function. Therefore, the white light emitted from the light source device 11 is split into blue light, green light and red light by the first and second dichroic mirrors 20 and 21. The blue light reflected by the first dichroic mirror 20 is reflected by the field mirror 22, the green light reflected by the second dichroic mirror 21 remains unchanged, and the red light that has passed through the second dichroic mirror 21 is reflected by the field mirrors 23 and 24. The light is reflected and guided to the video generation device 30.

  The image generating device 30 attaches the red liquid crystal panel 33r, the green liquid crystal panel 33g, and the blue liquid crystal panel 33b to the three side surfaces of the cubic color combining prism 31 via the polarizing plates 32r, 32g, and 33b, respectively. Configured. On the light incident side of the three liquid crystal panels 33r, 33g, and 33b, optical compensators 34r, 34g, and 34b for blocking the incidence of unnecessary light component waves on the liquid crystal panels 33r, 33g, and 33b, and polarization are respectively provided. Plates 35r, 35g, and 35b are arranged.

  Accordingly, the blue light reflected by the first dichroic mirror 20 and the field mirror 22 is guided to the blue incident side polarizing plate 35b, and the incident side polarizing plate 35b, the blue optical compensation plate 34b, and the blue liquid crystal panel. 33b and the blue output side polarizing plate 32b, etc., to the color synthesis prism 31. The green light reflected by the second dichroic mirror 21 is guided to the green incident side polarizing plate 35g, and the incident side polarizing plate 35g, the green optical compensator 34g, the green liquid crystal panel 33g, and the green light. The light combining prism 31 is passed through the output side polarizing plate 32g. Similarly, red light transmitted through the first dichroic mirror 20 and the second dichroic mirror 21 and reflected by the two field mirrors 23 and 24 is guided to the incident-side polarizing plate 35r for red, and the incident-side polarized light. The color composition prism 31 is reached through the plate 35r, the red optical compensation plate 34r, the red liquid crystal panel 33r, and the red emission side polarizing plate 32r.

  The three colors of image light guided to the color combining prism 31 are combined by the color combining prism 31 and the color image light obtained thereby is enlarged and projected onto the front screen through the projection lens 3.

  The color synthesizing prism 31, the liquid crystal panels 33r, 33g, and 33b for each color, and the output side polarizing plates 32r, 32g, and 32b are detachable as a unitary prism assembly 36 (see FIGS. 6 and 7). In addition, the incident side polarizing plates 35r, 35g, and 35b and the optical compensators 34r, 34g, and 34b are configured to be detachable individually. The prism assembly 36, the incident side polarizing plates 35r, 35g, 35b and the optical compensators 34r, 34g, 34b can be maintained by opening the lid 6 of the maintenance opening 5 as shown in FIG. .

  5A and 5B are diagrams showing the configuration and operation of the main part of the light source device 11 according to the present embodiment. FIG. 5A is a perspective view of the front opening as seen from the right side, FIG. The flow of cooling air is shown.

  The light source device 11 according to the present embodiment includes an arc tube 110 made of a high-pressure mercury lamp or the like, and a reflector 111 that is disposed so as to cover the arc tube 110 and has a parabolic reflection surface formed on the inner surface and an open front surface. And a heat-resistant glass plate (transparent member) 112 that closes the front opening 111a of the reflector 111. The substantially spherical portion on the base side of the arc tube 110 is a light emitting portion 110a that has a discharge electrode and emits discharge light.

  As shown in FIG. 5 (a), the reflector 111 is previously formed with notches 111b to 111e for ventilation at equal intervals (90 ° intervals) on the top, bottom, left and right of the front opening edge. In the present embodiment, the notch 111d on the left side of the front opening edge of the reflector 111 is used as the intake port 113, while the notch 111e on the opposite surface (right side) facing the intake port 113 is closed, Notches 111b and 111c on both side surfaces (upper and lower surfaces) serve as exhaust ports 114 and 114, respectively.

  In this way, by providing the cooling air exhaust ports 114 and 114 at two positions approximately 90 ° apart from the air intake port 113, the cooling air flowing from the air intake port 113 to the tip of the arc tube 110 as indicated by the arrow a1 is obtained. Since the notch part 111e and the front opening 111a on the opposing surface side are closed by hitting the opposing surface, it passes through the light emitting part 110a of the arc tube 110 toward the back as indicated by the arrow a2, and is indicated by the arrow a3. Thus, the cooling air uniformly cools the periphery of the arc tube 110 without stagnation in the reflector 111. With this configuration, the interior of the reflector 111 can be uniformly cooled even when the light source device 11 is installed at an arbitrary angle at a low cost.

  As described above, the cooling air is circulated throughout the reflector 111 of the light source device 11 without stagnation, thereby facilitating the temperature adjustment of the arc tube 110 and the tip of the arc tube 110, the light emitting unit 110a, and the reflector. Since the cooling effect in the vicinity of the opening 111a can be obtained, the light source device 11 can be installed at an arbitrary angle, and there is no restriction on the installation angle of the liquid crystal projector 1 at low cost.

  In addition, since the exhaust ports 114 and 114 are disposed at approximately 90 ° on both sides from the intake port 113, the exhaust ports 114 and 114 are located at the intermediate portions on both sides of the intake port 113 and its opposite surface. The effect of circulating through the whole without being stagnated in 111 becomes larger.

  In the present embodiment, the exhaust ports 114 and 114 are arranged at approximately 90 ° on both sides from the intake port 113 as described above. However, by providing the exhaust ports 114 and 114 on both side surfaces, a certain amount can be obtained. The effect can be expected.

  6 to 9 are diagrams showing the mounting configuration of the prism assembly part 36 described above. FIG. 6 is an exploded perspective view seen from diagonally above, FIG. 7 is an exploded perspective view seen from diagonally below, and FIG. FIG. 9 is an enlarged view of a main part of the main part, showing a state where the main part is shown.

  The prism assembly 36 is protruded inward from the base portion 40 having a built-in projection lens moving mechanism through an attachment screw 363 through a screw through hole 362 of a leg portion 361 protruding in three directions from a base 360 at the bottom thereof. The fixing portion 41 is fixed to the female screw portion 411 with screws.

  On the mounting portion 41, a pair of engagement pieces 413 are erected at predetermined intervals from an elastic member 412 such as a leaf spring. Each of the engagement pieces 413 is formed with a hemispherical convex portion 414 protruding outward.

  On the other hand, the bottom surface side of the base 360 of the prism assembly 36 is hollow, and an engagement hole 365 is formed in the opposing inner wall for elastically engaging the convex portion 414 of each of the engagement pieces 413. Yes.

  Here, the pair of engaging pieces 413 and 413 on the mounting portion 41 side are erected in accordance with the interval of the inner wall in which the engaging hole 365 on the base 360 side of the prism assembly 36 is formed, The prism assembly 36 has elasticity so that it can be attached and detached when a force larger than its own weight is applied to the prism assembly 36.

  Furthermore, the attachment screw 363 is formed with a male screw portion 364 that is screwed into the female screw portion 411 on the attachment portion 41 side only at the tip portion. Further, the screw through hole 362 on the prism assembly part 36 side is formed to have a smaller diameter than the male screw portion 364 of the mounting screw 363, and a female screw portion (not shown) through which the male screw portion 364 can be screwed is formed. Has been.

  In the above configuration, when the prism assembly part 36 is attached, when the base 360 of the prism assembly part 36 is pushed in to a predetermined position of the attachment part 41, the engagement piece of the attachment part 41 as shown in FIGS. The convex portion 414 of 413 is in a state of being temporarily fixed by elastically engaging with the engagement hole 365 on the base 360 side. In this state, when the attachment screw 363 passed through the screw through hole 362 on the prism assembly part 36 side is tightened to the female screw part 411 on the attachment part 41 side, the prism assembly part 36 is fixed to the attachment part 41.

  On the other hand, when the prism assembly 36 is to be removed when the liquid crystal projector 1 is installed upside down by 180 ° in a suspended state, the lid 6 of the maintenance opening 5 is opened as shown in FIG. Then, the mounting screw 363 of the prism assembly 36 is turned with a screwdriver to remove it from the female screw portion 411 of the mounting portion 41. Even if all the mounting screws 363 are removed without holding the prism assembly part 36 by hand, the prism assembly part 36 is temporarily fixed by the engagement piece 413 having elasticity larger than its own weight and does not fall. When all the mounting screws 363 of the prism assembly part 36 are removed, the prism assembly part 36 can be easily detached by pulling by hand. Therefore, the prism assembly 36 can be easily replaced while the liquid crystal projector 1 is suspended from the ceiling, and the work efficiency during maintenance is greatly improved.

  Furthermore, even if the mounting screw 363 is removed from the female screw portion 411 of the mounting portion 41 with a screwdriver, it does not come off from the screw through hole 362 of the prism assembly part 36, so that it does not take time to remove the mounting screw 363 from the driver. Since the next mounting screw 363 can be removed, the working efficiency is further improved.

  Further, by applying the above-described technique to the prism assembly 36 formed by integrating the liquid crystal panels 33r, 33g, and 33b for each of the RGB colors and the output-side polarizing plates 32r, 32g, and 32b with the color combining prism 31, the apparatus can be obtained. There is a great effect that parts can be easily replaced without falling and falling while installed on the ceiling.

  In addition, by configuring the liquid crystal projector 1 as described above, it is possible to easily replace parts while the apparatus is suspended from the ceiling, and it is possible to realize the liquid crystal projector 1 with greatly improved work efficiency during maintenance.

  In the present embodiment, the engaging piece 413 having elasticity is formed on the mounting portion 41 side, and the engaging hole 365 for engaging the convex portion 414 of the engaging piece 413 is formed on the prism assembly component 36 side. In other words, the opposite effect is possible. In short, if an engaging portion having elasticity is formed on at least one of them, the same effect as described above can be obtained.

  10 to 13 are diagrams showing a mounting configuration of the incident-side polarizing plates 35r, 35g, and 35b and the optical compensators 34r, 34g, and 34b described above. FIG. 10 is a diagram illustrating a method of fixing the adjustment component 42, which is a frame to which the optical compensation plate 34g is attached in the present embodiment. FIG. 10A is an exploded perspective view showing a mounting configuration of the adjustment component 42 that is a frame to which the above-described optical compensation plate 34g is attached and an adjustment component stopper 44 that is an auxiliary member to the housing. FIG. 10B is a perspective view showing a state in which the adjustment component 42 is fixed to the housing using the adjustment component stopper 44, and FIG. 11 is a top view of a main part showing a state in which the adjustment component 42 is inserted into the housing. FIG. 12 is a side view of the adjustment component 42 to which the incident-side polarizing plates 35r, 35g, and 35b and the optical compensation plates 34r, 34g, and 34b are attached, and FIG. Here, the green optical compensator 34g and the adjustment component stopper 44 will be described as an example, but the same applies to the red and blue polarizing plates.

  As shown in FIG. 10A, the incident-side polarizing plate 35g and the optical compensation plate 34g are attached to the adjustment component 42. The adjustment component 42 is a resin-made substantially disk-shaped frame in which a total of four corners of the upper part and the lower part are rounded. Both side edges of the adjustment component 42 are inserted into the mounting groove 431. The mounting groove 431 is formed on both side walls of the mounting portion 43 and has a rounded bottom end (not shown) so that the inserted adjustment component 42 can rotate. In the present embodiment, the mounting groove 431 is divided at the left and right at the lower portion, but one groove may be formed integrally with the left and right.

  In this embodiment, an engagement piece 422 that is slightly bent on one side and uses the elasticity of resin is formed at the center of both side edges of the substantially disc-shaped adjustment component 42 (FIGS. 12 and 13). See also). The engagement piece 422 has elasticity that allows it to be attached and detached when a force larger than its own weight is applied to the adjustment component 42 that holds the incident-side polarizing plate 35g and the optical polarizing plate 34g. Further, the bent side surfaces of these engagement pieces 422 are formed in a substantially arc shape as shown in FIGS. 12 and 13 so as not to be caught when inserted into the mounting groove 431 of the mounting portion 43. Yes.

  In the above configuration, when the adjustment component 42 to which the incident-side polarizing plates 35r, 35g, and 35b and the optical compensation plates 34r, 34g, and 34b are attached is attached to the attachment groove 431, the adjustment component 42 is attached to the attachment portion 43 correspondingly. When inserted into the groove 431 and pushed in against the elasticity of the engaging piece 422, the engaging piece 422 elastically moves into the mounting groove 431 of the mounting portion 43 like the adjustment component 42 holding the polarizing plate 35g shown in FIG. It will be in the state temporarily engaged by engaging.

  After being inserted into the mounting groove 431, the adjustment component 42 is fixed to the housing via the adjustment component stopper 44. Specifically, the second fixing portion 613 (also see FIG. 11), which is a frame-side positioning portion and a circular protrusion, provided on the adjustment component 42 is an adjustment component that is the second portion of the auxiliary member. The semi-circular cut 612 of the stopper 44 is pressed so as to be wrapped from the left and right and from above. At the same time, the first fixing portion 611 that is the first portion of the auxiliary member provided on the other end side is temporarily fixed to the screw attachment portion 432 provided on the upper surface of the attachment portion 43 with the attachment screw 441. Next, the angle of the optical compensator 34g is adjusted within the range of play of the first fixed portion 611 by rotating the handle piece 421 for attachment to the housing and rotation adjustment provided on the upper part of the adjustment component 42. adjust. After the adjustment, the attachment screw 441 is permanently fixed to the screw attachment portion 432, and the adjustment component 42 holding the incident-side polarizing plate 35g and the optical compensation plate 34g is firmly fixed to the housing (FIG. 10B).

  There has been a configuration that enables adjustment of the polarizing plate by rotating the adjustment part, but those that directly screw the adjustment part, or do not rotate by pressing the protrusion provided on the adjustment part There was also something to do. However, when the adjustment component is screwed by directly applying pressure to the adjustment component via the auxiliary member, there is a problem that the adjustment component rotates. Another problem is that the adjustment component moves in the same direction as the screw at the end of screwing, and the optical axis is distorted. On the other hand, in this embodiment, by screwing with the attachment screw 441 through the auxiliary member 44, the adjustment component 42 is applied with a downward force perpendicular to the minimum optical axis. The adjustment part 42 does not move, and the angle of the polarizing plate can be adjusted accurately and easily.

  When the liquid crystal projector 1 is installed in a state where it is turned upside down 180 ° in a suspended state, the adjustment component 42 to which the incident side polarizing plates 35r, 35g, 35b and the optical compensators 34r, 34g, 34b are attached is removed. As shown in FIG. 4, the lid body 6 of the maintenance opening 5 is opened, and the mounting screw 441 of the adjustment component stopper 44 is removed with a screwdriver. Since the adjustment component stopper 44 is attached by one mounting screw 441, the adjustment component stopper 44 can be easily removed by holding the handle piece 421 of the adjustment component 42. Even if the adjustment component stopper 44 is removed, the adjustment component 42 holding the incident polarizing plate 35g and the optical compensation plate 34g is temporarily fixed by the engagement piece 422 having elasticity larger than its own weight, and does not fall. When the adjustment part stopper 44 is removed, it can be easily removed by pulling the handle piece 421 of the adjustment part 42 by hand. Therefore, the incident side polarizing plates 35r, 35g, and 35b and the optical compensators 34r, 34g, and 34b can be easily replaced while the liquid crystal projector 1 is suspended from the ceiling without losing the adjustment function, and the work efficiency during maintenance can be improved. improves.

  In addition, the flat plate-shaped resin adjustment component 42 to which the incident-side polarizing plates 35r, 35g, and 35b and the optical compensation plates 34r, 34g, and 34b are attached is used in the mounting groove 431 of the mounting portion 43 by using the elasticity of the resin. By forming the engagement pieces 422 that are in pressure contact, the maintainability of the incident-side polarizing plates 35r, 35g, and 35b and the optical compensators 34r, 34g, and 34b is greatly improved at low cost.

  By configuring the liquid crystal projector 1 as described above, after adjusting the angle of the polarizing plate, it is possible to fix the polarizing plate while maintaining the adjusted state. In addition, it is possible to easily replace parts while the apparatus is suspended from the ceiling, and the liquid crystal projector 1 with improved work efficiency during maintenance can be realized.

  In the present embodiment, the case where the above-described technique is applied to the incident-side polarizing plates 35r, 35g, and 35b and the optical compensators 34r, 34g, and 34b has been described. However, any optical component that is attached via an adjustment component may be used. It can be applied to other optical components.

  FIGS. 14A, 14B, and 14C are diagrams showing the configuration and operation of the adjustment component to which the lens is fixed. Here, the condenser lens 19 shown in FIG. 3 will be described as an example.

  For the adjustment part 45 of the rectangular frame formed of resin, positioning is performed by fitting both ends of one side (lower side in the figure) of the outer periphery of the condenser lens 19 to the two lower corners. Fitting portions 451 and 451 are formed. These positioning fitting portions 451 are configured by a wall portion 452 on the back side and a claw portion 453 on the front surface side. Further, only the front-side claw portion 454 is formed at an intermediate portion between the positioning fitting portions 451.

  On the other hand, the upper two corners of the adjustment component 45 are elastically fitted to the upper end portions of the outer peripheral edge of the condenser lens 19 whose lower side is fitted to the positioning fitting portion 451 with elasticity. Portions 455 and 455 are formed. These elastic fitting portions 455 are erected on the frame body 45 and bent in a substantially U shape on the inner side, and claw portions 456 are formed on the inner piece that is elastically deformed.

  In the above configuration, when the condenser lens 19 is attached to the adjustment component 45, first, as shown in FIG. 14A, one side (lower side) of the condenser lens 19 is fitted for positioning on the lower side of the adjustment component 45. It is sandwiched between the wall part 452 and the claw part 453 of the parts 451 and 451. Then, as shown in FIG. 14B, the other side (upper side) of the condenser lens 19 is pushed into the elastic fitting portions 455 and 455 on the upper side of the adjustment component 45.

  As a result, both upper end portions of the condenser lens 19 are fitted into the claw portions 456 of the elastic fitting portion 455 as shown in FIG. 14C, tension is applied in the direction of the arrow, and the condenser lens 19 is completely Positioning is fixed.

  On the other hand, when removing the condenser lens 19 from the adjustment component 45, the two elastic fitting portions 455 are elastically deformed outward and the fitting state between the claw portion 456 and the condenser lens 19 is released, so that the condenser lens 19 is easily removed. be able to.

  As described above, since the lens can be fixed with one component, the number of components is small, so that the working efficiency can be increased and the cost can be reduced. Furthermore, a dedicated capital investment such as welding for fixing the lens is not required. Further, both the adjustment component 45 and the condenser lens 19 can be reused.

  Further, since the adjustment component 45 is formed of resin and the elastic fitting portion 455 is formed using the elasticity of the resin, further cost reduction can be realized.

  By constructing the liquid crystal projector 1 using the above-described technology, the working efficiency is increased and the cost is reduced, and no special equipment such as welding is required, and both the adjustment component 45 and the condenser lens 19 are used. The liquid crystal projector 1 that can be reused can be realized.

  The lens is not limited to the condenser lens 19 and can be applied to various lenses as long as the lens is fixed to the adjustment component. For example, although not shown in the optical system of FIG. 3, a relay lens is generally used to adjust the difference in the optical path lengths of RGB colors. However, since this relay lens is also fixedly attached to an adjustment component, the above-described technique is used. Is applicable.

  FIG. 15A is a perspective view showing a polarizing plate pressing and fixing portion in the present embodiment. FIG. 15B is a perspective view showing a state where the inorganic polarizing plate 623 is pressed and fixed to the polarizing plate pressing and fixing portion in the present embodiment. FIG. 15C is an LL cross-sectional view of FIG. 15B showing a state where the inorganic polarizing plate 623 is pressed and fixed to the polarizing plate pressing and fixing portion in the present embodiment.

  Many of the components around the color combining prism 31 have a short life and require frequent replacement. Therefore, the projection display apparatus according to the present embodiment has a structure in which these components can be easily accessed and replaced when the upper lid 6 is opened. The inorganic polarizing plate 623 in the present embodiment is also one of components having a short life. Therefore, it is desirable that the inorganic polarizing plate 623 can be exchanged simply and safely without opening or closing the lid further if the upper lid is opened. However, it is not desirable to add many parts to provide such a structure.

  Therefore, in this embodiment, as shown in FIG. 15A, the inorganic polarizing plate 623 is exchanged and fixed using the elasticity of the resin arm 622 formed integrally with the lid, as shown in FIG. . The installation procedure is as follows. First, the end of the inorganic polarizing plate 623 is pressed against an L-shaped guide groove 621 that is provided on the arm 622 and serves as a guide for inserting the inorganic polarizing plate 623. And the inside of the groove | channel 626 for inorganic polarizing plates which is a groove | channel where a polarizing plate is inserted is slid below (FIG.15 (c)). The inorganic polarizing plate 623 is inserted until the lower end of the inorganic polarizing plate 623 hits the lower portion of the inorganic polarizing plate groove 626. Next, the arm 622 is lifted and placed on the inorganic polarizing plate 623, and the inorganic polarizing plate 623 is pressed and fixed to the housing (FIG. 15C).

  In the state where the inorganic polarizing plate 623 is not fixed (FIG. 15A), the arm 622 is positioned below the fixed state shown in FIGS. 15B and 15C (not shown). That is, since the arm 622 is pushed upward in the fixed state of the inorganic polarizing plate 623, the arm 622 is disposed obliquely downward in the upper fixing portion 624 as shown in FIG. The upper end of the inorganic polarizing plate 623 thus formed is configured to be held obliquely downward from the incident side by elastic force. Further, as shown in FIG. 15C, the lower end portion of the inorganic polarizing plate groove 626 in which the inorganic polarizing plate 623 is inserted is cut and narrowed on the incident side to form a lower fixing portion 625. With these structures, by pressing the inorganic polarizing plate 623 against the side surface on the emission side of the mounting portion 43, not only vertical fixing but also horizontal fixing is possible.

  The inorganic polarizing plate 623 in the present embodiment is obtained by vapor-depositing a metal on a glass substrate. For example, the inorganic polarizing plate 623 is sold by Polatechno under the trade name “ProFlux”. When a finger comes in contact with the surface of the polarizing plate, it cannot be used as a polarizing plate due to oxidation. Therefore, in order to attach the inorganic polarizing plate 623 to the housing, it is necessary to consider such as attaching the inorganic polarizing plate 623 while holding the side surface. In the present invention, a guide groove 621 is provided in the arm 622, and a simple fixing method of the inorganic polarizing plate 623 using the elasticity of the arm 622 integrated with the housing is used. Thereby, the inorganic polarizing plate 623 can be easily attached to the inorganic polarizing plate groove 626 without touching the surface of the inorganic polarizing plate 623.

  Furthermore, the inorganic polarizing plate 623 can be easily removed by lifting the arm 622 with a force that overcomes the elastic force and opening it outward. Therefore, according to this structure, the inorganic polarizing plate 623 can be easily replaced as long as the lid 6 is opened without introducing additional components. Accordingly, the inorganic polarizing plate 623 can be fixed and replaced with a simple configuration, and the cost can be reduced.

  In addition, even when the liquid crystal projector 1 is installed in a state where the liquid crystal projector 1 is suspended upside down by 180 ° while being suspended from the ceiling, the inorganic polarizing plate 623 does not fall due to fixation by the arm 622. However, the inorganic polarizing plate 623 can be attached and detached simply by moving the arm 622 with a force that overcomes the elastic force. Therefore, the inorganic polarizing plate 623 can be easily replaced while the liquid crystal projector 1 is suspended from the ceiling, and the work efficiency during maintenance is improved.

  FIG. 16 is an exploded perspective view showing a housing configuration of the optical system.

  The optical system 12 according to the present embodiment is housed in an optical system housing portion 46 having an upper surface opening formed of a heat-resistant resin with less heat shrinkage, and the upper surface opening of the optical system housing portion 46 housing the optical system 12 is an upper lid 47. It is supposed to be covered.

  Conventionally, the entire upper lid 47 is made of heat-resistant resin, but in this embodiment, a sheet metal upper lid 471 is used at a high-temperature portion close to the light source position, and the heat-resistant resin is not used at a low-temperature portion somewhat away from the light source position. A resin upper lid 472 having elasticity is used. Specifically, since the upper part of the first integrator lens 14 shown in FIG. 3 is covered with a sheet metal upper lid 471, a small area is sufficient as shown in FIG.

  The dimensional tolerances of the optical components housed in the optical system housing portion 46 are absorbed by simple spring structure portions 473 and 474 formed by cutting out a part of the sheet metal upper lid 471 and the resin upper lid 472. It is configured.

  As described above, by using a sheet metal upper lid 471 for the high temperature portion of the optical system 12 and a resin upper lid 472 for the low temperature portion, the dimensional tolerances of the optical components can be absorbed by each elasticity and surely fixed. become.

  This eliminates the need for a separate part for fixing the optical part, thereby reducing the number of parts and man-hours. Further, since no expensive heat-resistant resin is used for the upper lid 47, a significant cost reduction can be realized.

  In addition, the dimensional tolerance of the optical components housed in the optical system housing portion 46 can be absorbed by simple spring structure portions 473 and 474 formed by cutting out part of the sheet metal upper lid 471 and the resin upper lid 472. It can be easily realized.

  FIG. 17 is a diagram showing a fixed portion of the lens frame 63. FIG. 17A is a perspective view of the frame 63 before sliding as seen obliquely from above on the incident side. FIG. 17B is a perspective view seen obliquely from above on the emission side when the frame 63 is slid from the position of FIG. 17A in the direction perpendicular to the optical axis to form the auxiliary fixing portions 631a and 631b. FIG. FIG. 17C is a perspective view seen from obliquely above the incident side.

  The frame 63 having optical components needs to be adjusted in the left-right direction perpendicular to the optical axis. For that purpose, after adjusting the position by sliding the frame 63, it is necessary to fix the both ends of the frame 63 with screws. First, as shown in FIG. 17A, the lens mounting portion of the frame 63 is inserted into the housing. Here, the lens mounting portion is not shown, but has a structure as shown in FIG. Next, as shown in FIG. 17B, the frame 63 is slid until the protruding portions 632a and 632b engage with the claws 633a and 633b of the housing, respectively, thereby forming auxiliary fixing portions 631a and 631b. In this state, the frame-side screw holes 634a and 634b and the housing-side screw holes 635a and 635b are temporarily fixed by screws 636a and 636b, respectively, to form main fixing portions 637a and 637b shown in FIG. Then, after adjusting the position of the frame 63 by sliding so that the optical axis is not distorted, the screws are further tightened and finally fixed to fix the relative position of the frame 63 to the housing.

  Here, the movable range of the frame 63 is a range of play in the left and right directions of the housing side screw holes 635a and 635b in FIG. 17C, and this is a width that sufficiently covers the range necessary for the adjustment of the frame 63. Have. As shown in FIG. 17B, in this range, the projecting portions 632a and 632b always mesh with the claws 633a and 633b of the housing, respectively, and form auxiliary fixing portions 631a and 631b. That is, even when the maintenance work is performed in a state where the liquid crystal projector 1 is suspended upside down by 180 ° in a ceiling state, if the temporary fixing is performed on at least one of the main fixing portions 637a and 637b, the frame is Even if it moves, the frame 63 does not fall from the liquid crystal projector 1. Further, if the auxiliary fixing portions 631a and 631b are formed, the frame 63 will not fall regardless of whether the main fixing portions 637a and 637b are screwed.

  Conventionally, in order to prevent the frame from dropping in a suspended state, it has been necessary to perform screwing work while supporting the frame with one hand. However, by providing protrusions 632a and 632b on the frame 63 and engaging these with the claws 633a and 633b provided on the housing, it is not necessary to support the frame with one hand, and it is possible to work using both hands freely. Become. Accordingly, it is possible to easily and safely exchange and adjust the lens attached to the frame 63 while the liquid crystal projector 1 is suspended from the ceiling, and the work efficiency during maintenance is improved without increasing costs.

  In the auxiliary fixing portion, the protruding portions 632a and 632b and the claws 633a and 633b may be provided on either the incident side or the emission side, but may be provided on both. Further, each of the protruding portions 632a and 632b and the claws 633a and 633b may be one, or three or more. Further, the auxiliary fixing portions 631a and 631b are not limited to a mode in which there is a projection on the frame side and a claw on the housing side, but may have a claw on the frame side and a projection on the housing side, or a mode other than the projection and claw. May be.

  FIG. 18 is a perspective view showing a housing configuration of the integrator lens portion. FIG. 18A is a perspective view showing a usage state of the pressure contact members 641a and 641b in the present embodiment. FIG. 18B is a view of the pressure contact member 641a in the present embodiment as viewed from the M direction in FIG. FIG. 18C is a view of the pressure contact member 641a in the present embodiment as viewed from the N direction of FIG. The pressure contact members 641a and 641b are made of, for example, elastic hard rubber and have a pressing portion 651.

  The optical system 12 of the present embodiment is housed in an optical system housing portion 46 having an upper surface opening formed of a heat-resistant resin with less heat shrinkage, and the upper surface opening of the optical system housing portion 46 housing the optical system 12 is shown in FIG. It is comprised so that it may cover with the upper cover 47 to show.

  The liquid crystal projector 1 according to the present embodiment includes the first integrator lens 14 illustrated in FIG. 3 at a position on the optical path closest to the light source device 11. The first integrator lens 14 shown in FIG. 18A is provided between the left and right ribs and is inserted and fixed in grooves 646 and 649 having a width wider than the thickness of the first integrator lens 14. The left rib 645 is perpendicular to the optical path. Therefore, the groove 646 between the ribs 645 and 647 that grips the integrator lens 14 is also perpendicular to the optical path. On the other hand, of the right-side ribs 648 and 650, the exit-side rib 650 is perpendicular to the optical path, but the incident-side rib 648 is inclined to the incident side.

  As shown in FIGS. 18A and 18B, the press contact members 641a and 641b have a pressing portion 651 that is a protrusion formed integrally therewith. The pressing portion 651 is positioned inside the grooves 646 and 649 when the pressure contact members 641a and 641b are mounted on the ribs 645 and 648, respectively. The integrator lens 14 inserted in the grooves 646 and 649 is pressed and fixed to the ribs 647 and 650 on the emission side in the grooves 646 and 649 by the elastic force of the pressing portion 651, respectively. The pressure contact member 641b installed on the right rib 648 presses the first integrator lens 14 inserted in the groove 649 in an oblique direction on the emission side. That is, in the same manner as the left pressure contact member 641a, in addition to the function of pressing the first integrator lens 14 in parallel with the optical path, the first integrator lens 14 is also pressed in the direction of the left pressure contact member 641a. As a result, the first integrator lens 14 can be kept perpendicular to the optical axis, and the position of the first integrator lens 14 in the left-right direction can be accurately adjusted. In other words, the light incident on the first integrator lens 14 can be accurately emitted without deviation. In the right rib 648 or 650, one pressing member may be used as a presser in the left-right direction and the optical path direction of the first integrator lens 14, respectively. Moreover, the structure of a rib may be reversed right and left.

  The two press contact members 641a and 641b used in this embodiment are the same on the left and right. One pressure contact member has two cuts 642 and 643 that are symmetrical with respect to the long axis direction. In addition, one protrusion 644 having the same shape is formed below the left and right ribs so as to mesh with any of the notches. When the left and right pressure contact members 641a and 641b are arranged so as to cover the incident-side ribs 645 and 648 in directions opposite to each other by 180 °, the positions of the pressure contact members 641a and 641b are firmly fixed on the ribs 645 and 648, respectively. Is done. As a result, the first integrator lens 14 can be securely fixed. Further, since the pressure contact members 641a and 641b are the same on the left and right, the cost can be reduced.

  As described above, simple and reliable fixing is possible by using the pressure contact members 641a and 641b for fixing the first integrator lens 14.

  Conventionally, a pressure contact member has been used for fixing a lens or the like, but the purpose is exclusively for fixing a lens or the like. On the other hand, the pressure contact members 641a and 641b according to the present embodiment fix the first integrator lens 14 and, at the same time, absorb light that does not transmit through the optical components even when the light source is tilted. And by reflecting, it also has the function of protecting the resin on the side surfaces of the ribs 645 and 648 from heat.

  Therefore, in addition to fixing the optical component, an additional component for protecting the resin on the side surfaces of the ribs 645 and 648 from heat becomes unnecessary, so that the number of components and man-hours can be reduced. Furthermore, since no expensive heat-resistant resin is used for the upper lid 47, the cost can be reduced.

  The pressure contact members 641a and 641b may be metal leaf springs. According to this, the side surfaces of the ribs 645 and 648 made of resin can be widely covered with the sheet metal. That is, light from the light source can be absorbed and reflected by the sheet metal, and the side surfaces of the resinous ribs 645 and 648 can be protected from heat. Thereby, the improvement of durability of a housing | casing is realizable. If a metal leaf spring that also functions as a pressure contact is used, it is not necessary to provide new parts, paint the side surfaces of the ribs, or change the color of the resin itself. Thereby, cost reduction can be aimed at.

  In this embodiment, the pressure contact member is used only for fixing the first integrator lens 14, which is considered to be most likely to be deteriorated by light irradiation because the resin nearby is closest to the light source, but the second integrator lens 16 or Of the polarizing plate, an optical component such as an incident side polarizing plate that does not require fine adjustment may have this structure.

  FIG. 19 is a diagram showing the configuration and operation of the projection lens removing device, and FIG. 20 is an exploded perspective view showing the projection lens mounting mechanism.

  The mounting mechanism of the projection lens 3 shown in FIG. 20 is the same as the conventional one, and the projection lens 3 is fixed by a pin that restrains the rotation of the projection lens 3 mounted in a screwed manner, like an interchangeable lens of a camera. A push button 48 for releasing the rotation constraint of the projection lens 3 by the fixing pin is provided above the mounting portion 49 of the projection lens 3. A projection lens removing device 50 of this embodiment shown in FIG. 19 is attached above the projection lens 3 in the vicinity of the push button 48 as shown in FIG.

  As shown in FIG. 19, the projection lens removing device 50 of the present embodiment surrounds the projection lens removing button 7 whose upper surface is exposed from the upper surface of the main body case 1 as shown in FIG. It has a frame 51 and an elastic body 52 made of a coil spring that biases the projection lens removal button 7 upward. The projection lens removal button 7 is provided with a substantially cylindrical sliding member 71 protruding on both sides. On the other hand, the frame 51 includes a first inclined surface 511 on which one side of the sliding member 71 of the projection lens removal button 7 slides, and a second inclined surface 512 on which the other side of the sliding member 71 slides. As shown in FIG. 20, a pressing member 513 for pressing a push button 48 provided on the upper portion of the mounting portion 49 of the projection lens 3 is provided. Here, a driven mechanism is constituted by the frame 51 and its first inclined surface 511 with respect to the sliding member 71, and a backward movement mechanism is constituted by the elastic body 52 and the second inclined surface 512 of the frame 51. ing.

  In the above configuration, when the projection lens removal button 7 exposed on the upper surface of the main body case 1 is operated and moved downward as shown in FIG. 19B, the sliding member 71 provided on the projection lens removal button 7 is framed. It is possible to slide the first inclined surface 511 provided in 51, move the frame body 51 in a direction crossing the moving direction of the projection lens removal button 7, and press the push button 48 by the pressing member 513. Become. Thereby, the rotation restriction by the fixing pin of the projection lens 3 attached to the projection lens attachment portion 49 is released, and the projection lens 3 can be rotated and removed.

  Further, after the projection lens 3 is detached, the projection lens removal button 7 is automatically set to the initial position by the restoring force of the elastic body 52 installed at the lower part of the projection lens removal button 7 as shown in FIG. At the same time, the frame 51 can be automatically moved back by sliding with the second inclined surface 512 of the sliding member 71.

  As a result, the projection lens removal button 7 can be installed in a direction that intersects with the moving direction of the push button 48, so that there are fewer restrictions on the installation surface of the projection lens removal button 7. Accordingly, since the projection lens removal button 7 can be installed so as to be exposed on the upper surface of the main body case 1, the liquid crystal projector 1 with improved operability of the projection lens removal button 7 can be realized.

  Further, after the projection lens removal button 7 is operated, the projection lens removal button 7 and the frame 51 can be automatically returned to their original positions. Accordingly, it is possible to follow in the intersecting direction with a small number of parts, and to perform a reliable return of the mechanism.

  If the push button 48 has a sufficient restoring force, the returning mechanism as described above can be omitted by using the restoring force.

  FIG. 21 is a perspective view showing a main configuration of the projection lens moving device.

  The projection lens moving device 53 includes an up / down direction moving member 531, a left / right direction moving member 532, a driving mechanism (not shown), and a control mechanism described later. The projection lens 3 is attached to the left / right moving member 532 and moves in the left / right direction when the left / right moving member 532 is driven, and moves in the left / right direction together with the up / down moving member 531 when the up / down moving member 531 is driven. The member 532 moves up and down, and the projection lens 3 moves up and down.

  Each moving member 531, 532 is formed with a movement amount limiting shaped through-hole 533, 534 communicating with each other, and separation type photo interrupters 54, 54 are arranged at openings on both sides thereof. Since the horizontal movement member 532 moves independently in the horizontal direction, the vertical movement member 531 is formed with a horizontally long through hole 533.

  FIG. 22 is a block diagram showing a control mechanism of the projection lens moving device 53. The microcomputer 55 constituting the control means moves up and down based on the operation display unit 8 and the input from the photo interrupter 54 described above. The motor 56 and the left / right movement motor 57 are controlled. The microcomputer 55 detects that the moving members 531 and 532 have moved and blocked the light based on the output from the photo interrupter 54 and determines that the moving limit has been reached. When the movement amount is small, an ordinary U-shaped photo interrupter may be used instead of the separation type photo interrupters 54 and 54.

  23 and 24 are flowcharts showing an example of movement amount restriction control.

  In the control example of the flowchart shown in FIG. 23, first, the input of the lens shift signal from the operation display unit 8 is awaited (NO loop of step S11), and if there is an input of the lens shift signal, it corresponds to the input lens shift signal. The drive motor 56 or 57 is driven and controlled in the corresponding direction (YES in step S11 → step S12).

  After that, it waits for the signal from the photo interrupter 54 to be turned off (NO loop in step S13), and when the photo interrupter signal is turned off, the light is blocked by the moving member 531 or 532, and thus moves. It is determined that the limit has been exceeded, and the moving motor 56 or 57 that has been driven is stopped (YES in step S13 → step S14). Then, the moving motor 56 or 57 is reversely controlled for a predetermined time to return to within the movement amount limit, and the next lens shift signal is input (NO loop from step S15 to step S11).

  On the other hand, in the control example of the flowchart shown in FIG. 24, as described above, the lens shift signal is first input after waiting for the lens shift signal input from the operation display unit 8 (NO loop in step S21). The driving motor 56 or 57 corresponding to the lens shift signal is drive-controlled in the corresponding direction (YES in step S21 → step S22).

  After that, it waits for the signal from the photo interrupter 54 to be turned off (NO loop in step S23), and when the photo interrupter signal is turned off, the light is blocked by the moving member 531 or 532, and thus moves. It is determined that the limit has been exceeded, and the moving motor 56 or 57 that has been driven is stopped (YES in step S23 → step S24). Then, after waiting for the input of the lens shift signal in the reverse direction (NO loop of step S25), if there is an input of the lens shift signal in the reverse direction, the process returns to step S22 to control the movement motor 56 or 57. Perform (Step S25 → Step S22). In this control example, the reverse control for a predetermined time as in step 15 of the control example is not performed. Therefore, when the movement limit is exceeded, only the lens shift signal in the reverse direction (return direction) is accepted in step S25. Yes.

  As described above, in the present embodiment, the amount of movement in the vertical and horizontal directions can be limited by the pair of photo interrupters 54 and 54, and thus the cost can be reduced. In addition, since the movement amount can be limited only by a member that moves the projection lens 3 without using other components, the movement amount can be precisely controlled. Further, the amount of movement in any shape other than a square can be limited by the shape of the through holes 533 and 534 opened in the projection lens moving members 531 and 532.

  In the above embodiment, a liquid crystal projector using a liquid crystal panel as a light modulation element is shown as a projection image display device. However, a projection image including another image light generation system other than the invention requiring a liquid crystal panel. The present invention can also be applied to a display device. For example, the present invention can also be applied to a projector using a DLP (Digital Light Processing; registered trademark of Texas Instruments (TI)) system.

It is a perspective view which shows the liquid crystal projector which is one Embodiment of the projection type video display apparatus concerning this invention. It is the perspective view which removed and showed the case on it. It is a figure which shows the structural example of an optical system. It is a principal part perspective view which shows the state which open | released the cover body of the opening for maintenance. It is a figure which shows the principal part structure and effect | action of a light source device in this embodiment. It is a figure which shows the attachment structure of the prism assembly components in this embodiment, and is the exploded perspective view seen from diagonally upward. It is the disassembled perspective view similarly seen from diagonally downward. It is a principal part longitudinal cross-sectional view which shows the state similarly attached. It is the principal part enlarged view similarly. It is a figure which shows the fixing method of the adjustment components which are the frames which attached the optical compensation board in this embodiment. FIG. 10A is an exploded perspective view showing a mounting configuration of an adjustment component, which is a frame to which the above-described optical compensation plate is mounted, and an adjustment component stopper, which is an auxiliary member, on a housing. FIG. 10B is a perspective view showing a state in which the adjustment component is fixed to the housing using the adjustment component stopper. It is a principal part top view which shows the state which inserted the adjustment components in the housing | casing. It is a side view of the adjustment component to which the incident side polarizing plate and the optical compensation plate were attached. It is the principal part enlarged view similarly. It is a figure which shows the structure and effect | action of an adjustment component to which a lens is fixed in this embodiment. It is a perspective view which shows the polarizing plate press fixation part in this embodiment. It is a perspective view which shows the state by which the inorganic polarizing plate was similarly pressed and fixed to the polarizing plate press fixed part. It is LL sectional drawing of FIG.15 (b) which shows the state by which the inorganic polarizing plate was similarly pressed and fixed to the polarizing plate press fixation part. It is a disassembled perspective view which shows the housing | casing structure of the optical system in this embodiment. It is a figure which shows the fixed part of the flame | frame of a lens. FIG. 17A is a perspective view of the pre-sliding frame as viewed obliquely from the incident side. FIG. 17B is a perspective view seen from obliquely upward on the emission side when the frame is slid from the position of FIG. 17A in a direction perpendicular to the optical axis to form an auxiliary fixing portion. FIG. 17C is a perspective view seen from obliquely above the incident side. It is a perspective view which shows the housing structure of an integrator lens part. FIG. 18A is a perspective view showing a usage state of the pressure contact member in the present embodiment. FIG. 18B is a view of the pressure contact member in the present embodiment as viewed from the M direction in FIG. FIG. 18C is a view of the pressure contact member in the present embodiment as viewed from the N direction in FIG. It is a figure which shows the structure and effect | action of the projection lens removal apparatus in this embodiment. It is a disassembled perspective view which similarly shows the attachment mechanism of a projection lens. It is a perspective view which shows the principal part structure of the projection lens moving apparatus in this embodiment. It is a block diagram which similarly shows the control mechanism of a projection lens moving apparatus. It is a flowchart which similarly shows the example of control of movement amount restriction | limiting. It is a flowchart which similarly shows the other control example of movement amount restriction | limiting.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Liquid crystal projector, 14 1st integrator lens, 34r, 34g, 34b Optical compensator, 35r, 35g, 35b Incident side polarizing plate, 36 Prism assembly component, 42 Adjustment component, 421 Handle piece, 422 Engagement piece, 43 Mounting part , 431 mounting groove, 432 screw mounting portion, 44 adjustment part stopper, 441 mounting screw, 611 first fixing portion, 612 notch, 613 second fixing portion, 621 guide groove, 622 arm, 623 inorganic polarizing plate, 624 upper fixing portion 625 Lower fixing part, 626 Inorganic polarizing plate groove, 63 frame, 631a, 631b Auxiliary fixing part, 632a, 632b Projection part, 633a, 633b Claw, 634a, 634b Frame side screw hole, 635a, 635b Housing side screw hole, 636 a, 636b screw, 637a, 637b main fixing part, 641a, 641b pressure contact member, 642, 643 notch, 644 protrusion, 645, 647, 648, 650 rib, 646, 649 groove, 651 pressing part

Claims (4)

An optical device comprising an integrator lens on the optical path,
The resin housing of the optical device is provided with a groove into which the integrator lens is inserted,
The integrator lens is sandwiched by a pressure contact member disposed between the groove and the integrator lens, and the pressure contact member extends so as to cover the resin upstream of the integrator lens in the optical path. apparatus.   The optical apparatus according to claim 1, wherein the pressure contact member is installed at two positions on the left and right sides of the integrator lens and is formed in the same shape.   The optical apparatus according to claim 1, wherein the pressure contact member is made of metal.   A projection-type image display device comprising the optical device according to claim 1, wherein the light emitted from the light source is modulated and output based on an image signal.

Images