JP2009076217A - Optical apparatus and cooling method of light source - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical apparatus which can maintain both of a cooling efficiency and safety of a mercury lamp. <P>SOLUTION: A lamp house 101 is connected with a cooling fan 102 and cools down a lamp unit 10 housed in the lamp house 101. Between the cooling fan 102 and the lamp house 101, there is provided a lamp house shutter 103, and when the lamp house shutter 103 is open, cooled air is introduced from a lamp house in-take window to the lamp house 101, and when it is closed the cooled air is not introduced. When the lamp unit 10 is put in and a lamp cover 107 is mounted, the lamp house in-take window 104 and an in-take window 13 are kept open. On the other hand, when the lamp unit 10 is removed from the lamp house 101, both of the lamp house in-take window 104 in the lamp house 101 and the in-take window 13 in the lamp unit 10 are kept closed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical device in which a replaceable lamp unit is used, and a light source cooling method used in the optical device.

  In a display device such as a projector, for example, a mercury lamp is used as a light source with high emission intensity. The mercury lamp has a structure in which an electrode is provided in a glass tube and high-pressure mercury vapor is enclosed. In general, since a mercury lamp becomes hot during use, the mercury lamp has an empty structure. However, the glass tube may be broken by heating, and in this case, a replacement operation by the user is required.

  Corresponding to such a use situation, a structure having a structure that allows a user to replace the mercury lamp safely and easily has been devised and used. In such a structure, a lamp unit incorporating a mercury lamp is used, and replacement of the mercury lamp is performed in units of the lamp unit. Safety here refers to reducing the chances of users touching broken glass tube fragments.

  For example, FIG. 7 shows a cross-sectional structure around a mercury lamp in a lamp unit in the structure described in Patent Document 1. In the lamp unit 60, a mercury lamp 61 to be cooled is fixed to the lamp sealing portion 62. A reflecting mirror 63 is further fixed to the lamp sealing portion 62, and light emitted from the mercury lamp 61 is emitted from the front glass 64 toward the left side in the drawing. In order to cool the mercury lamp 61, a sirocco fan (multi-blade fan) 70 outside the lamp unit 60 is fixed to the lamp sealing portion 62 and the like. The sirocco fan 70 generates cooling air 71, and the cooling air 71 enters the inside of the reflecting mirror 63 through an inflow window 65 provided in a part of the reflecting mirror 63 and is provided at two locations of the lamp sealing portion 62. It exits from the reflecting window 63 through the outflow window 66. The lamp unit 60 is fixed in a projector (not shown) by a mounting bracket 72. In this structure, metal meshes 67a and 67b are installed on the inflow window 65 and the outflow window 66, respectively. Thereby, even if the mercury lamp 61 is broken, a glass piece larger than the opening of the metal mesh does not come out of the reflecting mirror 63 (lamp unit 60). Therefore, the user does not touch the glass piece directly.

  FIG. 8 shows a cross-sectional structure of the lamp unit in the structure described in Patent Document 2. Here, the sectional view shown in FIG. 8A is a sectional view when the lamp unit 80 is incorporated in the projector, and FIG. 8B is a sectional view when the lamp unit 80 is not incorporated in the projector. FIG. In the lamp unit 80, as in the lamp unit 60, a mercury lamp 81, a lamp sealing portion 82, a reflecting mirror 83, and a front glass 84 are used, and an inflow window 85 and an outflow window 86 are formed. . The lamp unit 80 is fixed to a projector (not shown) by a mounting bracket 91. Also in the lamp unit 80, the cooling air 92 enters the reflecting mirror 83 (lamp unit 80) from the air duct 93 through the inflow window 85, cools the mercury lamp 81, and reflects through the outflow window 86. It goes out of the mirror 83 (lamp unit 80). The exhaust fan 94 promotes the flow of the cooling air 92. In the lamp unit 80, a shutter 87 is provided on the inflow window 85, and a metal mesh 88 is provided on the outflow window 86. The shutter 87 is opened when the lamp unit 80 is attached (FIG. 8A), and the cooling air 92 is introduced from the inflow window 85. In a state where the lamp unit 80 is not attached (FIG. 8B), the inflow window 85 is blocked by the shutter 87 by the force of the spring. On the other hand, the metal mesh 88 in the outflow window 86 functions in the same manner as the lamp unit 60. Therefore, when the user removes the lamp unit 80 from the projector, the glass piece does not scatter from the lamp unit 80. Further, in this structure, since the intake resistance in the inflow window 85 is smaller than in the structure in which the metal mesh is provided in the inflow window, the cooling efficiency of the mercury lamp 81 is higher than that in the lamp unit 60.

With these structures, it was possible to increase the cooling efficiency of the mercury lamp and to suppress the scattering of the glass pieces when the glass tube of the mercury lamp was broken. As a result, even when the glass tube of the mercury lamp is broken, the user can safely replace the lamp unit.
JP 2001-125195 A JP 2001-183746 A

  However, in the optical apparatus using the lamp unit, it is difficult to increase both the cooling efficiency and safety of the mercury lamp.

  In the technique described in Patent Document 1, scattering of the glass piece is suppressed by the metal mesh, but the area of the suction window is effectively reduced by the metal mesh. Furthermore, this metal mesh is easily clogged with dust. In particular, dust in the environment where the projector is installed is adsorbed to the metal mesh provided on the suction window side from the outside. Thereby, cooling efficiency falls while using.

  On the other hand, when the glass tube of the mercury lamp is broken when the lamp unit described in Patent Document 2 is incorporated in the projector, the glass piece is not only inside the reflector, but also through the inflow window and the air duct. It also scatters to the side. When the user replaces the lamp unit, the glass piece does not scatter from the lamp unit side, but the glass piece may scatter from the air duct.

  Therefore, it has been difficult to keep both the cooling efficiency and safety of the mercury lamp high in an optical apparatus using a replaceable lamp unit.

  The present invention has been made in view of such problems, and an object thereof is to provide an invention that solves the above problems.

In order to solve the above problems, the present invention has the following configurations.
An optical apparatus according to the present invention is an optical apparatus that is used by mounting an exchangeable lamp unit provided with an inflow window for introducing cooling air in a lamp house, wherein the cooling air is supplied to the lamp house. A lamp house inflow window to be introduced into the inflow window; and a lamp house shutter that opens the lamp house inflow window when an external force is applied to the lamp house shutter driving unit; and the lamp unit is provided in the lamp house. An external force is applied to the lamp house shutter driving unit when the lamp house shutter is mounted.
In the optical apparatus of the present invention, a lamp lid is used when the lamp unit is mounted in the lamp house, and the lamp lid is attached to the lamp house shutter driving unit when the lamp lid is installed. A lamp house shutter driving latch for applying an external force is provided.
In the optical apparatus of the present invention, an elastic body is connected to the lamp house shutter, and the lamp house inflow window is closed by the lamp house shutter when no external force is applied.
In the optical apparatus of the present invention, the lamp unit is provided with a lamp shutter that opens the inflow window when an external force is applied to a lamp shutter driving unit when the lamp unit is mounted in the lamp house. The lamp house is provided with a lamp shutter driving locking portion that applies an external force to the lamp shutter driving portion when the lamp unit is mounted in the lamp house.
In the optical apparatus of the present invention, the lamp unit is provided with an outflow window through which the cooling air is exhausted.
In the optical apparatus according to the present invention, the outflow window is provided with a metal mesh.
In the optical apparatus according to the present invention, the cooling air is generated by a cooling fan, and a lower part of the duct in the cooling fan is configured to be removable.
The light source cooling method of the present invention is a method of cooling a light source in an optical apparatus in which an exchangeable lamp unit provided with an inflow window for introducing cooling air is mounted in a lamp house and used. A lamp house inflow window for introducing the cooling air into the inflow window, and when the lamp unit is mounted on the lamp house, the lamp house inflow window is opened by a lamp house shutter, and the lamp When the unit is detached from the lamp house, the lamp house inflow window is closed by a lamp house shutter.

  Since the present invention is configured as described above, it is possible to obtain an optical apparatus that maintains both the cooling efficiency and safety of the mercury lamp.

  Hereinafter, the best mode for carrying out the present invention will be described. Hereinafter, as an embodiment of the present invention, a projector will be described as an optical apparatus using a replaceable lamp unit.

(First embodiment)
FIG. 1 is a diagram showing a structure around a replaceable lamp unit in the projector according to the first embodiment of the present invention.

  In this projector, the lamp unit 10 is incorporated as a part of the optical engine 100 as a light source. The optical engine 100 is provided with a lamp house 101 that houses the lamp unit 10. A cooling fan 102 is connected to the lamp house 101 to cool (air cool) the lamp unit 10 housed in the lamp house 101. A lamp house shutter 103 is provided between the cooling fan 102 and the lamp house 101. When the lamp house shutter 103 is opened, cooling air is introduced into the lamp house 101 from the lamp house inflow window 104 and closed. In a state, it will not be introduced. The opening / closing operation of the lamp house shutter 103 is defined by the operation of the shutter lever 106 to which the lever spring 105 is connected. That is, the lamp house shutter 103 is connected to one end of a substantially L-shaped shutter lever 106 and moves in the left and right directions in FIG. 1 by the operation of the shutter lever 106, thereby opening and closing the lamp house inflow window 104. The

  In the lamp unit 10, a reflecting mirror 11 having a mercury lamp (not shown) inside is fixed to a lamp cartridge 12. The lamp cartridge 12 is provided with a cooling air inflow window 13 and an outflow window 14, and the inflow window 13 is provided with a lamp shutter 16 to which a shutter spring 15 is connected. The inflow window 13 is opened and closed by opening and closing. The lamp unit 10 is mounted from the lower side of the lamp house 101 as indicated by an arrow in FIG.

  In this projector (optical engine 100), the form when the lamp unit 10 is mounted is shown in FIG. 2A shows a state in which the lamp unit 10 is inserted into the lamp house 101, and FIG. 2B shows a state in which a lamp lid is further attached to attach and fix the lamp unit 10. It is. The right side of FIG. 2A shows the form of the lamp unit 10 in the inserted state.

  In this projector, when the lamp unit 10 is inserted into the lamp house 101 as shown in FIG. 2A, the inflow window 13 is opened. In this state, the lamp house inflow window 104 is closed. Thereafter, the lamp lid 107 is installed from the lower side in FIG. 2B, so that the lamp unit 10 is fixed in the lamp house 101. In addition, the lamp house inflow window 104 is opened. Accordingly, the cooling air generated by the cooling fan 102 flows along the direction of the arrow in FIG. 2B, and the cooling air is introduced into the inflow window 13 by the lamp house inflow window 104, and the mercury lamp 11 is cooled.

  The lamp lid 107 is provided with a lamp lid projection (lamp house shutter driving latching portion) 108, which contacts the shutter lever 106. Below, the form of the lamp house 101 and the lamp unit 10 when the lamp cover 107 is mounted will be described.

  FIG. 3 is a diagram showing in detail the form of the lamp house 101 when the lamp cover 107 is mounted. Here, FIG. 3A shows a state before the lamp cover 107 is attached, and FIG. 3B shows a state where it is attached. The lamp house 101 is provided with a lamp house inflow window 104 and a lamp house outflow window 109. As shown in FIG. 3B, the lamp house inflow window 104 is provided at a location corresponding to the outlet of the cooling fan 102, and when the lamp unit 10 is mounted, the inflow window. It corresponds also to the place where 13 is arranged. The lamp house outflow window 109 also corresponds to the place where the outflow window 14 is arranged when the lamp unit 10 is mounted. It should be noted that the description of the lamp unit 10 is omitted in both FIGS.

  In a state before the lamp cover 107 is mounted (FIG. 3A), the lamp house shutter 103 is configured to close the lamp house inflow window 104. This is realized by the following form. That is, the substantially L-shaped shutter lever 106 is locked to the lamp house 101 at the shutter lever fulcrum 110 and moves in a direction using this as a rotation axis. The lever spring 105 is wound around the shutter lever fulcrum 110 as an axis, and one end of the lamp is fixed to the lamp housing 101 and the other end is fixed to the shutter lever 106. Therefore, when no external force is applied, the shutter lever 106 has an angle shown in FIG. 3A due to the elastic force of the lever spring 105, and the lamp house inflow window 104 is closed by the lamp house shutter 103. That is, an elastic body (lever spring 105) is connected to the lamp house shutter 103, and the lamp house inflow window 104 is closed by the lamp house shutter 103 when no external force is applied.

  In the state when the lamp cover 107 is mounted (FIG. 3B), the lamp house inflow window 104 is opened. This is realized by the following form. When the lamp cover 107 is mounted, the lamp cover protrusion 108 is in contact with the end of the shutter lever 106 opposite to the side to which the lamp house shutter 103 is connected (the other end: the lamp house shutter drive unit). Is provided. With this configuration, when the lamp cover 107 is mounted, the shutter cover 106 moves against the tension of the lever spring 105 by the lamp cover protrusion 108, resulting in the form (angle) shown in FIG. Accordingly, the lamp house shutter 103 moves to the right side in FIG. Accordingly, when the lamp lid 107 is attached, the lamp house inflow window 104 is opened. That is, the lamp house 101 is configured such that the lamp house inflow window 104 is opened when an external force is applied to the lamp house shutter driving unit. Further, when the lamp unit 10 is inserted and the lamp cover 107 is mounted, this external force is applied to the lamp house shutter driving unit. This external force is applied when a lamp lid protrusion (lamp house shutter driving locking portion) 108 provided on the lamp lid 107 contacts the lamp house shutter driving portion.

  Therefore, the lamp house inflow window 104 is closed when the lamp cover 107 is not attached, and the lamp house inflow window 104 is opened when the lamp cover 107 is attached, due to the configuration of the lamp house 101 described above.

  On the other hand, FIG. 4 is a diagram showing the structure of the lamp unit 10 in more detail. Here, FIG. 4A is a state before the lamp unit 10 is mounted, and FIG. 4B is a mounted state. The lamp shutter 16 is engaged with the lamp cartridge 12 so as to move along the side surface of the lamp cartridge 12 where the inflow window 13 is provided. For this reason, as shown in FIG. 4B, the lamp shutter 16 is formed with an elongated guide hole 17 having an angle inclined from the vertical direction. A guide protrusion 18 provided on the side surface of the lamp cartridge 12 is engaged with the guide hole 17. Thereby, the movement of the lamp shutter 16 is defined by the shape of the guide hole 17. One end of a shutter spring 15 is connected to the lamp shutter 16, and the other end of the shutter spring 15 is fixed to the upper part of the side surface of the lamp cartridge 12, as shown in FIG. A lamp shutter driving projection (lamp shutter driving unit) 19 is provided at one end of the lamp shutter 16.

  In the lamp unit 10, when no external force is applied to the lamp shutter 16 (lamp shutter driving protrusion 19), the lamp shutter 16 is pulled by the shutter spring 15 as shown in FIG. Become. Accordingly, in FIG. 4, the lamp shutter 16 is fixed so that the guide protrusion 18 is fixed in a state where it is positioned at the lowermost part of the guide hole 17. In other words, the lamp shutter 16 is fixed at the uppermost portion, whereby the inflow window 13 is closed by the lamp shutter 16. This is the state when the lamp unit 10 is not mounted.

  The lamp unit 10 is housed in the lamp house 101 from below as shown in FIG. Therefore, if a lamp shutter driving engagement portion (not shown) is provided at a position corresponding to the lamp shutter driving projection 19 on the inner wall of the lamp house 101, the lamp shutter driving projection 19 is attached to the lamp shutter 10 when the lamp unit 10 is mounted. The force acts on the lower side in FIG. Accordingly, the lamp shutter 16 moves toward the lower right side in FIG. Therefore, when the lamp unit 10 is mounted on the lamp house 101, the state shown in FIG.

  In this case, as illustrated in FIG. 4B, the lamp shutter 16 is pulled downward against the tension of the shutter spring 15. Accordingly, in FIG. 4B, the lamp shutter 16 is fixed so that the guide protrusion 18 is fixed in a state where it is positioned at the uppermost portion of the guide hole 17. That is, the lamp shutter 16 is fixed at the lowermost portion, and the inflow window 13 is thereby opened. That is, when the lamp unit 10 is mounted in the lamp house 101, the inflow window 13 is opened by applying an external force to the lamp shutter driving protrusion (lamp shutter driving portion) 19. The external force is applied when the lamp shutter driving engagement portion abuts against the lamp shutter driving protrusion (lamp shutter driving portion) 19 when the lamp unit 10 is mounted on the lamp house 101.

  With the configuration of the lamp unit 10 described above, the inflow window 13 is closed when the lamp unit 10 is not inserted, and the inflow window 13 is opened when the lamp unit 10 is inserted. . The outflow window 14 is always open regardless of the above operation.

  When the lamp housing 101 and the lamp unit 10 are used in combination, the lamp unit inflow window 104 and the inflow window 13 are inserted when the lamp unit 10 is inserted and the lamp lid 107 is attached. Will be open. Since the lamp house outflow window 109 and the outflow window 14 are always open, the cooling air generated by the cooling fan 102 passes through the lamp house inflow window 104 and the inflow window 13 to cool the mercury lamp and flow out. It passes through the window 14 and the lamp house outflow window 109 and goes out of the lamp house 101. Therefore, the mercury lamp can be efficiently cooled. Since the metal mesh is not used for the lamp house inflow window 104 and the inflow window 13, clogging does not occur due to dust sucked together with the cooling air.

  On the other hand, in a state where the lamp unit 10 is removed from the lamp house 101, the lamp house inflow window 104 in the lamp house 101 and the lamp unit 10 in the state shown in FIGS. 2A and 3A. Both inflow windows 13 are closed. Therefore, even if the glass tube of the mercury lamp is broken at this time, the glass piece does not scatter from the inflow window 13. Further, when the glass tube is broken during use, the glass piece may be scattered on the cooling fan 102 side through the inflow window 13 and the lamp house inflow window 104. However, the glass piece does not scatter from the lamp house inflow window 104 with the lamp unit 10 removed.

  A similar structure can be provided for the outflow window 14 and the lamp house outflow window 109. Thereby, scattering of the glass piece from the outflow window 14 and the lamp house outflow window 109 can be similarly suppressed. However, these may not be provided with the same structure as described above, but may be configured such that the outflow window 14 is provided with a metal mesh. The reason for this is that when a metal mesh is provided on the inflow side window, dust is easily clogged with dust, whereas dust that has once entered the reflector 11 (near the mercury lamp) burns due to high temperatures, so the outflow side This is because there is a low possibility that the metal mesh provided in the window will be clogged with dust. Thereby, scattering of the glass piece from the lamp unit 10 is suppressed.

  Therefore, in the projector using the lamp house 101 and the lamp unit 10, both the cooling efficiency and safety of the mercury lamp can be kept high.

  In the above embodiment, the shutter lever 106 has a substantially L shape, and the elongated guide hole 17 is formed in the lamp shutter 16 to realize the above operation when the lamp unit 10 is mounted. However, it is not limited to this. Even when the shutter lever 106 and the lamp shutter 16 have different shapes and the same operation is realized, it is obvious that the same effect can be obtained.

(Second Embodiment)
In the projector according to the second embodiment, the safety is further improved by devising the structure of the duct in the cooling fan used in the projector according to the first embodiment.

  FIG. 5 is a perspective view showing the structure in the vicinity of the lamp house 201 and the cooling fan 210 in this projector, and FIG. 6 is a cross-sectional view showing the structure of the cooling fan 210.

  Similar to the projector according to the first embodiment, in this projector, the cooling fan 210 is connected to the lamp house 201 having the same structure as the lamp house according to the first embodiment, and the lamp house inflow window 204 is connected. Introduce cooling air. The inner wall structure (duct) in the cooling fan 210 has a two-piece structure of an upper duct 211 and a lower duct (lower duct) 212. The lamp house 201 and the cooling fan 210 (lower duct 212) are fixed to the bottom cabinet 220.

  When the mercury lamp breaks while the projector is in use, as shown in FIG. 6A, the glass piece 230 passes from the inside of the lamp unit (reflecting mirror) through the inflow window and the lamp house inflow window. May enter the duct.

  Here, as described in the first embodiment, when the lamp unit is removed, the glass piece 230 is not scattered through the lamp house inflow window. However, if the number of glass pieces 230 in the duct increases every time the mercury lamp is broken, the cooling efficiency is reduced. Moreover, since dust also accumulates in the duct, periodic cleaning is necessary. However, if many glass pieces 230 exist at that time, it is dangerous.

  Therefore, in this cooling fan 210, the duct has a two-piece structure, and the lower duct 212 can be removed as shown in FIG. 6B. Further, as shown in FIG. 5, the lower duct 212 has a simple shape composed of a flat surface and a simple curved surface, unlike a lamp unit or the like. Therefore, since the glass piece 230 exists on the surface of the simple structure on the lower duct 212 by gravity, if the lower duct 212 is removed, the glass piece 230 can be easily cleaned. At this time, dust and the like in the cooling fan 210 can be removed particularly easily. Alternatively, the lower duct 212 may be replaced in the same manner as the lamp unit.

  As described above, when the glass tube of the mercury lamp is broken, the user removes the lamp unit itself after removing the lamp unit from the lamp house 201. At this time, since the glass piece does not scatter from the lamp unit or the lamp house 201, the user can perform this operation safely.

  On the other hand, a glass piece 230 exists in the cooling fan 210. This can be easily removed by removing the lower duct 230. Therefore, if the lamp unit is replaced and the lower duct 230 is cleaned (replaced), no glass piece remains in the projector.

  Therefore, in addition to the effects of the first embodiment, safety can be further improved.

  In the above example, the case where a mercury lamp is used as the light source has been described. However, the present invention is not limited to this, and the lamp house, the lamp unit, and the cooling fan having this structure are similarly applicable as long as the light source can be replaced. It is clear that can be used.

  In each of the above embodiments, the example in which the present invention is applied to the projector has been described. However, the present invention is not limited to this, and it is apparent that the present invention can be applied to any optical apparatus using a replaceable light source. It is.

1 is an external view of a projector according to a first embodiment of the invention. In the projector which becomes the 1st Embodiment of this invention, it is a figure (a: before lamp cover mounting | wearing, b: after lamp cover mounting | wearing) which shows the form when a lamp unit is mounted | worn. It is a figure (a: before lamp cover mounting | wearing, b: after lamp cover mounting | wearing) which shows the form when a lamp unit is mounted | worn in the lamp house of the projector used as the 1st Embodiment of this invention. It is a figure (a: lamp unit insertion, b: after lamp unit insertion) which shows the form at the time of mounting | wearing with the lamp unit of the projector used as the 1st Embodiment of this invention. It is a figure which shows the structure of the cooling fan vicinity in the projector used as the 2nd Embodiment of this invention. It is sectional drawing of the cooling fan in the projector used as the 2nd Embodiment of this invention. It is sectional drawing of an example of the lamp unit used for the conventional projector. It is sectional drawing of another example of the lamp unit used for the conventional projector.

Explanation of symbols

10, 60, 80 Lamp unit 11, 63, 83 Reflector 12 Lamp cartridge 13, 65, 85 Inflow window 14, 66, 86 Outflow window 15 Shutter spring 16 Lamp shutter 17 Guide hole 18 Guide protrusion 19 Lamp shutter drive Projection (lamp shutter drive)
61, 81 Mercury lamps 62, 82 Lamp sealing portions 64, 84 Front glass 67a, 67b, 88 Metal mesh 70 Sirocco fans 71, 92 Cooling air 72 Mounting bracket 87 Shutter 93 Blower duct 94 Exhaust fan 100 Optical engine 101, 201 Lamp house 102, 210 Cooling fan 103 Lamp house shutter 104, 204 Lamp house inflow window 105 Lever spring 106 Shutter lever 107 Lamp cover 108 Lamp cover protrusion (Lamp house shutter driving latch)
109 Lamphouse outflow window 110 Shutter lever fulcrum 211 Upper duct 212 Lower duct (lower duct)
220 bottom cabinet

Claims (9)

An interchangeable lamp unit provided with an inflow window for introducing cooling air is an optical instrument that is used in a lamp house,
The lamp house is provided with a lamp house inflow window for introducing the cooling air into the inflow window, and a lamp house shutter for opening the lamp house inflow window by applying an external force to the lamp house shutter driving unit. And
When the lamp unit is mounted in the lamp house, an external force is applied to the lamp house shutter driving unit. When the lamp unit is installed in the lamp house, a lamp lid is used,
An optical apparatus, wherein the lamp cover is provided with a lamp house shutter driving locking portion that applies an external force to the lamp house shutter driving portion when the lamp cover is installed.   The optical apparatus according to claim 1, wherein an elastic body is connected to the lamp house shutter, and the lamp house inflow window is closed by the lamp house shutter when no external force is applied. The lamp unit is provided with a lamp shutter that opens the inflow window by applying an external force to the lamp shutter driving unit when the lamp unit is mounted in the lamp house.
The lamp house is provided with a lamp shutter driving locking portion that applies an external force to the lamp shutter driving portion when the lamp unit is mounted on the lamp house.
The optical apparatus according to any one of claims 1 to 3, wherein the optical apparatus is characterized in that:   The optical apparatus according to claim 1, wherein the lamp unit is provided with an outflow window through which the cooling air is exhausted.   The optical apparatus according to claim 5, wherein the outflow window is provided with a metal mesh. The cooling air is generated by a cooling fan,
The optical apparatus according to any one of claims 1 to 6, wherein a lower part of the duct in the cooling fan is removable.   The optical apparatus according to any one of claims 1 to 7, wherein the optical apparatus is a projector. A method for cooling a light source in an optical apparatus in which an exchangeable lamp unit provided with an inflow window for introducing cooling air is mounted in a lamp house and used.
The lamp house is provided with a lamp house inflow window for introducing the cooling air into the inflow window,
When the lamp unit is mounted on the lamp house, the lamp house inflow window is opened by a lamp house shutter,
When the lamp unit is removed from the lamp house, the lamp house inflow window is closed by a lamp house shutter.
A method of cooling a light source.

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