JP2017142281A - Projection optical device and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection optical device for projecting an image on a side where light enters and for forming a space that can be externally operated.SOLUTION: A projection optical device 1B includes: a first optical system 41 for refracting incident light to exit on a first direction 10D side; a second optical system 42 for reflecting the light exiting from the first optical system 41 to a second direction 20D intersecting the first direction 10D, and further reflecting the light propagating in the second direction 20D on a third direction 30D side opposite to the first direction 10D side; a third optical system 43 for refracting the light exiting from the second optical system 42 to exit on the third direction 30D side; a first storage 51 for storing the first optical system 41; and a third storage 53 for storing the third optical system 43. A notched part 533 is disposed at an end on the third direction 30D side of the third storage 53 on the first storage 51 side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projection optical apparatus and a projector.

  2. Description of the Related Art Conventionally, there has been known a projector including a light modulation device that modulates light emitted from a light source according to image information and a projection optical device that projects light modulated by the light modulation device onto a projection surface. Then, the projection optical apparatus is bent so that the projection optical apparatus can be replaced so that a different projection optical apparatus can be used (see, for example, Patent Document 1) and the projection optical apparatus can be disposed close to the projection surface. A proposed technique (for example, see Patent Document 2) has been proposed.

The technique described in Patent Document 1 includes an interchangeable lens attaching / detaching device. The interchangeable lens attaching / detaching device includes an attaching / detaching mechanism, an attaching / detaching support mechanism, and a lock mechanism. The attachment / detachment mechanism has an operation lever portion, and the lock mechanism has an operation button portion. When the interchangeable lens (projection optical device) is mounted on the projector main body, the interchangeable lens is inserted into the projector main body and then rotated by the operation of the operation lever unit. When the interchangeable lens is rotationally displaced to a predetermined position, it is locked by the lock mechanism. On the other hand, when the interchangeable lens is removed from the projector body, the interchangeable lens is unlocked by pressing the operation button unit, and is rotated in the opposite direction to the above by the operation of the operation lever unit. Can be removed.
Patent Document 2 discloses a projector having a first relay lens group, a direction changing optical element, and a wide-angle lens system, and a lens system (projection optical device) configured to change the direction of light by about 180 °. It is disclosed.

JP 2010-78776 A Japanese Patent No. 5266642

However, in the technique described in Patent Document 1, since the operation lever portion and the operation button portion are exposed on the same side as the interchangeable lens (projection optical device), the operation lever portion and the operation button are not used except for replacement of the projection optical device. There exists a subject that a part may be misoperated and the external appearance of a product will be impaired.
In Patent Document 2, it is described that the lens system can be detachably coupled to the projector main body, but no specific replacement method or mechanism is described. Further, it is conceivable to use the technique described in Patent Document 1 for the projector of Patent Document 2. However, since the technique described in Patent Document 1 is configured to rotate the lens system (projection optical device), the wide angle in the lens system is used. The lens system and the projector main body need to be separated from each other so as not to interfere with each other. That is, the problem that the projector including the lens system becomes large also arises.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 The projection optical apparatus according to this application example refracts incident light and emits the light toward the first direction, and the light emitted from the first optical system in the first direction. And a second reflecting portion for reflecting light traveling in the second direction to a third direction side opposite to the first direction side. An optical system, a third optical system that refracts the light emitted from the second optical system and emits the light toward the third direction, a first storage unit that stores the first optical system, and the second optical system A second storage portion for storing the system, and a third storage portion for storing the third optical system, and an end of the third storage portion on the first storage portion side on the third direction side is provided. A notch is provided, and the notch is inclined so as to approach the optical axis of the third optical system as the distance from the second optical system increases. Inclined portions which, and characterized in that said first housing portion is at least one recess which is recessed on the opposite side.

  According to this configuration, in the projection optical apparatus, the optical system is bent in a substantially U shape. That is, the first storage unit that stores the first optical system and the third storage unit that stores the third optical system are arranged to face each other. And the notch part is provided in the edge part of the 3rd direction side in the 1st accommodating part side of a 3rd accommodating part. Accordingly, the optical system in the direction along the first direction can be reduced in size, and in a device on which the projection optical device is mounted, a space is generated by the notch, and the device can be operated from this space. Can be provided.

  Application Example 2 In the projection optical apparatus according to the application example, it is preferable that the third optical system includes a lens that widens incident light.

  According to this configuration, since the projection optical apparatus includes the lens that widens the light incident on the third optical system, projection at a position close to the projection surface is possible.

  Application Example 3 A projector according to this application example includes a main body portion and the projection optical device described above that is detachable from the main body portion, and the main body portion includes a light source and light emitted from the light source. An optical unit having a light modulation device that modulates the optical unit, an exterior housing that houses the optical unit, and a lever that releases the engagement between the main body and the projection optical device, and the projection optical device includes: The light emitted from the optical unit is incident on the first optical system, the third storage portion is disposed on the second direction side of the main body portion, the lever is exposed from the exterior housing, It is arrange | positioned in the position which overlaps with the said 3rd accommodating part seeing from the 2nd direction side.

  According to this configuration, even if the third storage portion is disposed close to the exterior housing, the lever disposed at the position overlapping the third storage portion as viewed from the second direction side is notched and the exterior housing. It can be operated from between. Accordingly, it is possible to prevent the lever from being erroneously operated and to improve the external appearance by reducing the size and arranging the lever at a position where it is difficult to see from the external appearance.

  Application Example 4 In the projector according to the application example described above, it is preferable that the exterior housing has a first recess portion into which at least a part of the second storage portion is inserted.

  According to this configuration, it is possible to reduce the size of the projector in the direction along the first direction. In addition, since the main body and the projection optical device can be visually recognized as an integrated projector, the appearance of the projector can be improved.

  Application Example 5 In the projector according to the application example described above, the exterior housing includes a first outer surface on the third storage portion side and a second recess portion that is recessed from the first outer surface. It is preferable that an exposure hole for exposing the lever is provided in the recess portion 2.

  According to this configuration, since the projector has the second recess provided in the exterior casing in addition to the notch provided in the projection optical apparatus, the third storage portion is further provided in the exterior casing. Even if it is placed close to the lever, the lever can be operated. Therefore, the projector can be further miniaturized.

  Application Example 6 In the projector according to the application example described above, the lever is disposed so as not to protrude from the second recess portion, and is fitted into the second recess portion in a state where the projection optical device is detached. In addition, it is preferable that the outer casing is provided with a detachable cover.

  According to this configuration, since the projector includes the cover described above, another projection optical apparatus having an optical system different from the U-shape with the cover attached to the main body, for example, the first direction side A projection optical device or the like for projecting an image can be attached. Thus, when another projection optical device is mounted on the main body, the projector covers the lever and prevents the step of the outer casing from being recognized by the second recess. it can. Therefore, in a projector in which another projection optical device is mounted, it is possible to reliably prevent erroneous operation of the lever and improve the appearance.

1 is a side view schematically showing a projector according to an embodiment. FIG. 2 is a perspective view illustrating a part of the projector according to the embodiment. The schematic diagram which shows the main structures of the main-body part of this embodiment. The perspective view which shows a part of front part and upper surface part in the main-body part of this embodiment, and a cover. FIG. 2 is a partial cross-sectional view of the projector according to the embodiment. The perspective view which shows the state by which the cover was mounted | worn with the main-body part of this embodiment.

Hereinafter, the projector according to the present embodiment will be described with reference to the drawings.
The projector according to the present embodiment modulates light emitted from a light source according to image information, and enlarges and projects the modulated light onto a projection surface such as a screen.

[Main components of the projector]
FIG. 1 is a side view schematically showing a projector 1 of the present embodiment. FIG. 2 is a perspective view showing a part of the projector 1.
As shown in FIGS. 1 and 2, the projector 1 includes a main body 1A having an optical unit 3, a projection optical device 1B that can be attached to and detached from the main body 1A, and the main body 1A without the projection optical device 1B attached thereto. A cover 6 (see FIG. 4) that can be attached to and detached from the part 1A is provided.
The main body 1A emits light toward the first direction 10D. As shown in FIG. 1, the projection optical apparatus 1B includes an optical system bent in a substantially U shape when viewed from the side, and the light emitted from the optical unit 3 is transmitted in the first direction 10D and the first direction 10D. After traveling in the second direction 20D intersecting with the first direction 10D, it is ejected to the third direction 30D side opposite to the first direction 10D side. For convenience of explanation, the first direction 10D is indicated as the front, the second direction 20D is indicated as the upper side, and the right side of the projector 1 viewed from the third direction 30D is indicated as the right side.

[Configuration of the main unit]
FIG. 3 is a schematic diagram showing a main configuration of the main body 1A.
As shown in FIG. 3, the main body 1 </ b> A includes an exterior housing 2, a control unit (not shown) housed in the exterior housing 2, an optical unit 3, and an attachment / detachment mechanism 7. Although not shown, the main body 1A includes a power supply device that supplies power to the light source device 31 and the control unit of the optical unit 3, and a cooling device that cools the optical unit 3 and the power supply device.

  The exterior housing 2 is configured by combining a plurality of synthetic resin members. As shown in FIGS. 1 and 2, the front surface portion 2F that forms the front side (first direction 10D side), the upper side (second) The upper surface portion 2U that forms the direction (20D side), the back surface portion 2B that forms the rear side (the third direction 30D side), and the like. The outer surface 2Ua of the upper surface portion 2U corresponds to the first outer surface.

FIG. 4 is a perspective view showing a part of the front surface portion 2F and the upper surface portion 2U and the cover 6 in the main body portion 1A.
As shown in FIG. 4, the front surface portion 2 </ b> F is provided with a first recess portion 21 that is recessed toward the third direction 30 </ b> D. The upper side of the first hollow portion 21 is open, and a through hole 22 penetrating in the front-rear direction is formed at the center. In the projection optical apparatus 1B, a part (a part of a second storage part 52 described later) is inserted into the first recess part 21, and a part (a cylindrical part 511 of the first storage part 51 described later, see FIG. 1). Is inserted into the through hole 22 and attached to the main body 1A.

  Further, as shown in FIG. 4, the upper surface portion 2U is formed with a second dent portion 23 that is recessed from the outer surface 2Ua (first outer surface) following the first dent portion 21. In the upper surface 23U of the second depression 23, an exposure hole 23h is formed through which a later-described lever 711, 721 of the attachment / detachment mechanism 7 is exposed. The exposure hole 23h is formed in a rectangular shape in plan view, and an inclined surface 23s that widens toward the upper side is formed at the periphery. Although not shown, the exterior housing 2 is provided with an intake port for taking in outside air, an exhaust port for exhausting warm air inside the exterior housing 2 to the outside, and the like.

  The control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and functions as a computer, and is related to control of the operation of the projector 1, for example, image projection. Control and so on.

The optical unit 3 optically processes the light emitted from the light source device 31 under the control of the control unit, and emits the light to the projection optical device 1B.
As shown in FIG. 3, in addition to the light source device 31, the optical unit 3 places the integrator illumination optical system 32, the color separation optical system 33, the relay optical system 34, the optical device 35, and these optical components at predetermined positions on the optical path. An optical component casing 37 is provided.

  The light source device 31 includes a discharge-type light source 311 composed of an ultrahigh pressure mercury lamp, a metal halide lamp, and the like, a reflector 312 and the like. The light source device 31 reflects the light emitted from the light source 311 by the reflector 312 and emits the light toward the integrator illumination optical system 32.

The integrator illumination optical system 32 includes a first lens array 321, a second lens array 322, a polarization conversion element 323, and a superimposing lens 324.
The first lens array 321 has a configuration in which small lenses are arranged in a matrix, and divides the light emitted from the light source device 31 into a plurality of partial lights. The second lens array 322 has substantially the same configuration as the first lens array 321, and partially superimposes the partial light on the surface of the light modulation device 351 together with the superimposing lens 324. The polarization conversion element 323 has a function of aligning random light emitted from the second lens array 322 into substantially one type of polarized light that can be used in the light modulation device.

  The color separation optical system 33 includes two dichroic mirrors 331 and 332, and a reflection mirror 333. The light emitted from the integrator illumination optical system 32 is red light (hereinafter referred to as “R light”), green light (hereinafter referred to as “light”). G light ”) and blue light (hereinafter referred to as“ B light ”).

  The relay optical system 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344, and has a function of guiding the R light separated by the color separation optical system 33 to an R light light modulation device 351. The optical unit 3 has a configuration in which the relay optical system 34 guides the R light. However, the configuration is not limited thereto, and may be configured to guide the B light, for example.

The optical device 35 is a light modulation device 351 provided for each color light (the light modulation device for R light is 351R, the light modulation device for G light is 351G, and the light modulation device for B light is 351B), And a cross dichroic prism 352 as a color synthesizing optical device.
The light modulation device 351 includes a transmissive liquid crystal panel, an incident-side polarizing plate disposed on the light incident side of the liquid crystal panel, and an emission-side polarizing plate disposed on the light emission side of the liquid crystal panel.
The light modulation device 351 has a rectangular image forming area in which a plurality of micro pixels (not shown) are formed in a matrix. Each pixel is set to a light transmittance corresponding to the image information, and a display image is formed in the image forming area. Each color light is modulated by the light modulator 351 and then emitted to the cross dichroic prism 352.

  The cross dichroic prism 352 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. In the cross dichroic prism 352, the dielectric multilayer film reflects R light and B light modulated by the light modulation devices 351R and 351B, and transmits G light modulated by the light modulation device 351G. Synthesize modulated light.

  The attachment / detachment mechanism 7 is configured to be able to engage and release the projection optical apparatus 1B from the main body 1A. The projection optical apparatus 1B has levers 711 and 721, and the levers 711 and 721 are operated by an operator to be attached to and detached from the main body 1A. A schematic configuration of the attachment / detachment mechanism 7 will be described later.

[Configuration of projection optical device]
The projection optical apparatus 1B includes a plurality of lenses, and enlarges and projects the light combined by the cross dichroic prism 352 onto a projection surface disposed on the rear side (third direction 30D side) of the projector 1.
As shown in FIGS. 1 and 2, the projection optical apparatus 1B includes a first optical system 41, a second optical system 42, a third optical system 43, and a storage unit 5 that stores these optical systems. As described above, the optical system is generally U-shaped. The storage unit 5 includes a first storage unit 51 that stores the first optical system 41, a second storage unit 52 that stores the second optical system 42, and a third storage unit 53 that stores the third optical system 43. ing.

  As shown in FIG. 1, in the projection optical apparatus 1B, the light emitted from the cross dichroic prism 352 enters the first optical system 41, and the third optical system 43 is located above the exterior housing 2 (upper surface portion 2U). It is arranged to be located. That is, the third storage portion 53 is disposed on the second direction 20D side of the main body portion 1A, and the outer surface 2Ua of the exterior housing 2 is on the third storage portion 53 side.

  The first optical system 41 has a plurality of lenses (one lens is shown in FIG. 1), refracts the light emitted from the cross dichroic prism 352 of the main body 1A, and emits the light toward the first direction 10D.

The second optical system 42 has a first reflecting part 421 and a second reflecting part 422.
The first reflecting unit 421 is disposed in front of the first optical system 41 and reflects the light emitted from the first optical system 41 toward the second direction 20D. The second reflecting unit 422 reflects the light traveling in the second direction 20D toward the third direction 30D. In addition, the 2nd optical system 42 may be the structure which has a lens in addition to the 1st reflection part 421 and the 2nd reflection part 422.

  The third optical system 43 has a plurality of lenses (one lens is shown in FIG. 1), refracts the light emitted from the second optical system 42, and emits the light toward the third direction 30D. The third optical system 43 includes a lens that widens incident light, widens the angle of the light emitted from the second optical system 42, and projects the light upward. In other words, the projection optical apparatus 1B projects an image on a projection surface (not shown) arranged above the main body 1A in the second direction 20D on the third direction 30D side. In addition, the projection optical device 1B can project at a position close to the projection surface, and the projector 1 functions as a short focus projector by mounting the projection optical device 1B.

  As shown in FIG. 1, the first storage portion 51 has a cylindrical portion 511 on the light incident side, and this cylindrical portion 511 is inserted from the through hole 22 (see FIG. 4) of the first recess portion 21. A plurality of protrusions 511 a provided intermittently in the circumferential direction about the optical axis 41 </ b> Ax of the first optical system 41 are formed on the outer periphery of the cylindrical portion 511.

The second storage part 52 is formed in a rectangular cross section between the part where the first reflection part 421 is arranged and the part where the second reflection part 422 is arranged.
As shown in FIGS. 1 and 2, a part of the second storage portion 52 is inserted and disposed in the first recess portion 21 of the exterior housing 2.

As shown in FIG. 2, the third storage portion 53 is formed in a rectangular shape when viewed from the third direction 30 </ b> D side, and a protruding portion 531 that protrudes in the third direction 30 </ b> D side is formed on the exterior housing 2 side. Is formed.
FIG. 5 is a partial cross-sectional view of the projector 1, and is a view of the third storage portion 53 and the main body 1A in the vicinity of the third storage portion 53 as viewed from the left.
As shown in FIG. 5, the protruding portion 531 is formed so as to cover the end portion on the exterior housing 2 side of the lens 431 disposed on the most light emission side of the third optical system 43. Since the projection optical apparatus 1B is formed so as to perform tilt projection as described above, the portion of the lens 431 that does not contribute to image projection can be covered in this way.

Moreover, the 3rd accommodating part 53 has the lower surface part 53D which forms the main-body part 1A side (1st accommodating part 51 side), as shown in FIG.
The lower surface portion 53 </ b> D includes a facing portion 532 that faces the upper surface portion 2 </ b> U of the exterior housing 2, and a notch portion 533.
The notch portion 533 is provided on the rear side (the third direction 30D side) of the facing portion 532, and the end portion on the third direction 30D side on the main body 1A side (the first storage portion 51 side) of the third storage portion 53. Form. As shown in FIG. 5, the notch 533 includes a recess 533 a provided below the protrusion 531 and an inclined portion 533 b provided between the recess 533 a and the facing portion 532.

The recessed part 533a is recessed on the opposite side to the exterior housing | casing 2 (1st accommodating part 51). As shown in FIG. 2, the inclined portion 533 b is provided at the center of the third storage portion 53 in the left-right direction. As shown in FIG. 5, the inclined portion 533 b is directed from the end on the first direction 10D side of the recess 533 a toward the facing portion 532. Is inclined. Specifically, the inclined portion 533b is inclined so as to approach the optical axis 43Ax (see FIG. 1) of the third optical system 43 as the distance from the second optical system 42 increases.
Further, as shown in FIG. 5, a part of the facing part 532, the inclined part 533 b, and a part of the recessed part 533 a are formed so as to be located above the second recessed part 23. The slope 23s on the periphery of the exposure hole 23h is formed so as to be positioned below the facing portion 532 and the inclined portion 533b.

[Schematic configuration of attachment / detachment mechanism]
Here, a schematic configuration of the attachment / detachment mechanism 7 will be described.
Although detailed description is omitted, the attaching / detaching mechanism 7 includes a base member (not shown), a first rotating member 71, a second rotating member 72 (see FIG. 1), and a spring (not shown).
The base member (not shown) has an insertion hole through which the cylindrical portion 511 (see FIG. 1) of the first storage portion 51 is inserted, and is fixed to the optical component casing 37.

The first rotating member 71 has an insertion hole through which the cylindrical portion 511 is inserted. As shown in FIG. 4, a lever 711 exposed from the exposure hole 23h is provided at the end.
The second rotating member 72 has an insertion hole into which the cylindrical portion 511 is inserted, and a lever 721 (see FIG. 4) exposed from the exposure hole 23h is provided at the end. That is, the levers 711 and 721 are located below the third storage portion 53. In other words, the levers 711 and 721 are arranged between the first storage part 51 and the third storage part 53 at a position overlapping the third storage part 53 when viewed from the second direction 20D side. Moreover, the levers 711 and 721 are arranged so as not to protrude from the second recess 23 as shown in FIG.
Further, the insertion holes of the first rotating member 71 and the second rotating member 72 have a portion through which the plurality of protrusions 511a are not inserted and a notch through which the plurality of protrusions 511a are inserted (both not shown).

  The first rotating member 71 and the second rotating member 72 are rotatably supported by the base member with the optical axis 41Ax being the same axis. The first rotating member 71 is biased in the rotational direction by a spring (not shown) with respect to the second rotating member 72, and as shown in FIG. 4, the lever 711 and the lever 721 are separated from each other by a predetermined distance in the rotational direction. Arranged. The predetermined distance is a distance that an operator can hold with a fingertip.

  When the levers 711 and 721 are gripped by the operator's fingertips, the first rotating member 71 and the second rotating member 72 are rotated against the biasing force of the spring, and the lever 711 is the lever 721. It will be in the state close to. The first rotating member 71 and the second rotating member 72 are in a first state in which the projection optical apparatus 1B can be inserted at a predetermined position in the rotation direction in a state where the lever 711 is close to the lever 721, and are rotated from the first state. Then, it will be in the 2nd state which protrusion 511a engages. Then, in the second state, the first rotating member 71 and the second rotating member 72 are members that are not shown when the operator's finger is removed from the levers 711 and 721 and the first rotating member 71 is biased by the spring. Is in a third state in which the second state is maintained. That is, in the projection optical apparatus 1B, the levers 711 and 721 are operated, and in the first state, the cylindrical portion 511 is inserted through the first rotating member 71 and the second rotating member 72, and in the third state via the second state. Locked to the main body 1A.

  On the other hand, when the levers 711 and 721 are grasped with the fingertips from the third state, the projection optical device 1B is unlocked, and when the first rotating member 71 and the second rotating member 72 are rotated to predetermined positions, The engagement with the part 1A is released, and the body 1A can be detached. In addition, the marking which specifies the rotation direction of a 1st state and a 2nd state is provided in the right-and-left both sides of the exposure hole 23h of the upper surface 23U in the 2nd hollow part 23. As shown in FIG.

  In this way, the third storage portion 53 is formed with the notch portion 533, and the levers 711 and 721 are disposed below the notch portion 533, so that the facing portion 532 is the main body portion 1A (external housing). 2), the operator's fingertip is inserted between the notch 533 and the outer surface 2Ua, and a space for operating the levers 711 and 721 can be secured.

Further, the main body 1A is configured such that other projection optical devices (not shown) other than the projection optical device 1B having a substantially U-shaped optical system can be attached and detached, and when other projection optical devices are mounted. A cover 6 shown in FIG. 4 is attached.
As shown in FIG. 4, the cover 6 is formed so as to be fitted to the upper side of the first depression 21 and the second depression 23.
As shown in FIG. 4, the cover 6 is provided with an engaging portion 61 that protrudes from the end on the third direction 30 </ b> D side, and a protruding portion 62 that protrudes from both the left and right sides. The cover 6 is slid from the first direction 10D side to the third direction 30D side and attached to the exterior housing 2. Specifically, the cover 6 has the left and right protrusions 62 guided by the guide part 211 provided in the first recess part 21 and the engagement part 61 inserted into the insertion hole 24 provided in the upper surface part 2U. Attached to the exterior casing 2. Further, the cover 6 is maintained in a state where the engaging portion 61 is engaged with and attached to an engaged portion (not shown) provided in the insertion hole 24.

FIG. 6 is a perspective view showing a state in which the cover 6 is attached to the main body 1A. The cover 6 covers the exposed hole 23h as shown in FIGS. 4 and 6, and has a shape following the outer surface 2Ua as shown in FIG. And the cover 6 forms an opening part with the peripheral part of the 1st hollow part 21. As shown in FIG. The main body 1A to which the cover 6 is attached can be mounted with another projection optical device formed so as not to interfere with the cover 6, such as a projection optical device that projects an image in the first direction 10D. .
When the cover 6 is slid from the third direction 30D side to the first direction 10D side and removed from the exterior housing 2, the main body portion 1A can be mounted on the main body portion 1A of the projection optical device 1B described above. .

As described above, according to the present embodiment, the following effects can be obtained.
(1) Since the optical system of the projection optical apparatus 1B is bent in a substantially U shape, the front-rear direction (the direction along the first direction 10D) can be reduced in size. Further, on the first storage portion 51 side of the third storage portion 53, a notch portion 533 is provided at an end portion on the third direction 30D side. Accordingly, even when the facing portion 532, that is, the third storage portion 53 is arranged close to the exterior casing 2, the levers 711 and 721 can be operated from between the notch 533 and the exterior casing 2. . Therefore, it is possible to provide the projection optical apparatus 1B that can operate the levers 711 and 721 disposed in the vicinity of the third storage portion 53 while reducing the size.

  (2) In the projector 1, the levers 711 and 721 are located below the third storage portion 53. Accordingly, it is possible to prevent the levers 711 and 721 from being erroneously disposed at positions where the levers 711 and 721 are difficult to see from the outside, and to provide the projector 1 with improved appearance.

  (3) Since the projector 1 includes a lens that widens the light incident on the projection optical apparatus 1B, projection at a position close to the projection surface is possible.

  (4) The projector 1 is configured such that a part of the second storage portion 52 is inserted into the first hollow portion 21 of the exterior housing 2. Accordingly, the projector 1 can be downsized in the front-rear direction (the direction along the first direction 10D). In addition, since the main body 1A and the projection optical apparatus 1B can be viewed as an integrated projector 1, the appearance of the projector 1 can be improved.

  (5) Since the projector 1 includes the second recess 23 provided in the exterior housing 2 in addition to the notch 533 provided in the projection optical apparatus 1B, the facing portion 532 is further provided in the exterior housing. Even if it is arranged close to the body 2, the levers 711 and 721 can be operated. Therefore, the projector 1 can be further downsized.

  (6) The projector 1 is fitted with the first dent portion 21 and the second dent portion 23 in a state where the projection optical device 1B is removed from the main body portion 1A, and the cover 6 is detachable from the exterior housing 2. It has. The main body 1A is configured such that other projection optical devices can be attached and detached with the cover 6 attached. Thus, in the projector 1, when another projection optical apparatus is mounted on the main body 1 </ b> A, the levers 711 and 721 are covered by the cover 6, and the first recess 21 and the second recess 23 are covered. It is possible to prevent the step of the exterior casing 2 from being recognized. Therefore, in the projector 1 in which another projection optical device is mounted, it is possible to reliably prevent erroneous operation of the levers 711 and 721 and to improve the appearance.

(Modification)
In addition, you may change the said embodiment as follows.
The cutout portion 533 of the embodiment is formed in the order of the recessed portion 533a and the inclined portion 533b from the end portion on the third direction 30D side, but may be configured in the order of the inclined portion and the recessed portion. .
Moreover, although the notch part 533 of the said embodiment is comprised by the recessed part 533a and the inclination part 533b, the aspect comprised only by a recessed part or only an inclination part may be sufficient. In addition, the inclined portion may be partially uneven as long as it is inclined as a whole as well as a flat shape.

  The inclined portion 533b of the embodiment is provided at the center of the third storage portion 53 in the left-right direction, but may be formed over the entire left-right direction.

  In the said embodiment, although the 1st hollow part 21 and the 2nd hollow part 23 are connected and formed, even if it is a shape where the 1st hollow part 21 and the 2nd hollow part 23 space apart. Good. In the case of this configuration, the cover that is attached to and detached from the second recess 23 is not attached and detached by the slide method, but, for example, by engaging one side of the two opposite sides with the main body and then pressing the other A method of engaging with the main body can be exemplified.

  The projector 1 of the embodiment is configured such that a part of the second storage portion 52 is inserted into the exterior housing 2, but substantially all of the second storage portion 52 is inserted in the front-rear direction. You may comprise so that the 2nd accommodating part 52 may not be inserted in the exterior housing | casing 2. FIG.

  In the embodiment, the levers 711 and 721 are shown as members operated from the space provided by the notch 533. However, the present invention is also applicable to a configuration in which members other than the levers 711 and 721 are arranged. .

In the projector 1 of the embodiment, a transmissive liquid crystal panel is used as the light modulation device 351. However, a reflective liquid crystal panel may be used.
In addition, the light modulation device 351 of the above embodiment employs a so-called three-plate method using three light modulation devices corresponding to R light, G light, and B light. Or may be applied to a projector including two or four or more light modulation devices.
Further, a micromirror type light modulation device such as a DMD (Digital Micromirror Device) may be used as the light modulation device.

  The light source device 31 of the embodiment employs the discharge-type light source 311, but may be composed of other types of light sources, solid-state light sources such as light emitting diodes and lasers.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 1A ... Main-body part, 1B ... Projection optical apparatus, 2 ... Exterior housing, 2Ua ... Outer surface (1st outer surface), 3 ... Optical unit, 5 ... Storage part, 6 ... Cover, 7 ... Detachable mechanism, 10D ... 1st direction, 20D ... 2nd direction, 21 ... 1st hollow part, 23 ... 2nd hollow part, 23h ... Exposure hole, 30D ... 3rd direction, 31 ... Light source device, 41 ... 1st optical system, 41Ax: optical axis, 42: second optical system, 43: third optical system, 43Ax: optical axis, 51: first storage unit, 52: second storage unit, 53: third storage unit, 311: light source, 351 , 351B, 351G, 351R ... light modulation device, 352 ... cross dichroic prism, 421 ... first reflecting part, 422 ... second reflecting part, 533 ... notch part, 533a ... recessed part, 533b ... inclined part, 711, 721 ... lever.

Claims (6)

A first optical system that refracts incident light and emits the light in a first direction;
A first reflecting portion that reflects light emitted from the first optical system in a second direction that intersects the first direction, and light that has traveled in the second direction is opposite to the first direction side. A second optical system having a second reflecting portion that reflects toward the third direction;
A third optical system that refracts light emitted from the second optical system and emits the light toward the third direction;
A first storage portion for storing the first optical system;
A second storage section for storing the second optical system;
A third storage portion for storing the third optical system;
With
A notch portion is provided at an end of the third storage portion on the first storage portion side in the third direction side,
The notch is at least one of an inclined portion that is inclined so as to be closer to the optical axis of the third optical system and a recessed portion that is recessed on the opposite side to the first storage portion as the distance from the second optical system increases. A projection optical apparatus, characterized in that: The projection optical apparatus according to claim 1,
The projection optical apparatus, wherein the third optical system includes a lens that widens incident light. A projector that projects an image,
A projection optical apparatus according to claim 1 or claim 2, wherein the projection unit can be attached to and detached from the main body unit,
With
The main body is
An optical unit having a light source and a light modulation device for modulating light emitted from the light source;
An exterior housing for housing the optical unit;
A lever for releasing the engagement between the main body and the projection optical device;
With
In the projection optical device, light emitted from the optical unit is incident on the first optical system, the third storage unit is disposed on the second direction side of the main body unit,
The projector is characterized in that the lever is disposed at a position that is exposed from the exterior housing and overlaps the third storage portion when viewed from the second direction side. The projector according to claim 3,
The projector according to claim 1, wherein the exterior housing includes a first recess portion into which at least a part of the second storage portion is inserted. The projector according to claim 3 or 4, wherein
The exterior housing has a first outer surface on the third storage portion side, and a second recessed portion that is recessed from the first outer surface,
The projector according to claim 2, wherein an exposure hole for exposing the lever is provided in the second recess. The projector according to claim 5, wherein
The lever is arranged so as not to protrude from the second depression.
A projector comprising a cover that fits into the second recess and is attachable to and detachable from the exterior housing with the projection optical device removed.

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