WO2017163627A1

WO2017163627A1 - Optical device and optical converter

Info

Publication number: WO2017163627A1
Application number: PCT/JP2017/003903
Authority: WO
Inventors: 角田隆史; 鋪田和夫; 中山啓; 土屋道彦
Original assignee: 日立マクセル株式会社; 株式会社コシナ
Priority date: 2016-03-24
Filing date: 2017-02-03
Publication date: 2017-09-28
Also published as: JP7023441B2; JPWO2017163627A1

Abstract

An optical device comprises an optical device body (2) excluding an optical system, and the optical system including a projection lens unit (3) that projects emission light exiting from the optical device body (2) onto a projection plane to display an image. Specifically, the optical device comprises an optical system (5) including: an image angle conversion unit (8) that converts an image at a prescribed angle pertaining to the emission light (Co) from the optical device body (2) to an image rotated at least 90° about the optical axis; the projection lens unit (3) arranged in front of the image angle conversion unit (8) in the light traveling direction (Fc); and a lens shift mechanism (7) that supports the projection lens unit (3) and shifts the projection lens unit (3) vertically and/or horizontally (Fh).

Description

Optical apparatus and optical converter

The present invention relates to an optical device including a projection lens unit that projects light emitted from an optical device main unit excluding an optical system onto a projection surface unit and displays an image, and an optical converter used in combination with the projection lens unit. About.

Generally, projectors (optical devices) that project outgoing light emitted from a projector main body onto a screen through a projection lens and display an image on the screen are widely known. In addition, as a method for installing this type of projector, a stationary type and a ceiling type are known. Usually, the ceiling type is provided with a hanging bracket on the ceiling as disclosed in

Patent Documents

1 and 2 and the like. The projector is fixed to the lower end of the hanging bracket.

The ceiling-suspended type does not require a place for the projector, and is used, for example, in the presentation hall 100 where a fashion show as shown in FIG. 5 is performed. In FIG. 5, reference numeral (101) denotes a projector attached to the ceiling 103 via the hanging metal fitting 102. At such a presentation venue 100, a video camera (not shown) takes a portrait of the person 104 on the stage, which is the subject, and the projector (101) enlarges and displays it on the screen 105 provided on the rear wall of the stage. Yes.

JP 2010-014766 A JP 2011-180407 A

However, the conventional projector (optical device) installed by the above-described ceiling suspension type has the following problems to be solved.

That is, normally, since the projector (101) is installed in a horizontal state in which the longitudinal direction of the front view is located on the left and right, the screen shape is horizontally long. Therefore, in order to shoot the person 104 and enlarge and display only the person 104 on the vertically long screen unit 105, complicated processing such as trimming the person 104 by image processing or the like is required. In addition, since the number of pixels that can be used effectively is reduced, the image quality (resolution, etc.) of the image (video) to be enlarged is reduced.

On the other hand, the video camera is placed sideways, portrait photography is performed in which the entire person 104 enters a vertically long screen, and the longitudinal direction of the front view is vertically positioned like the projector 101v indicated by a virtual line in FIG. If it is installed in the state, it can be enlarged and displayed without image processing or the like, but on the other hand, it is an irregular installation method for the projector (101). The range and the trapezoidal correction range cannot be sufficiently secured, and the projector 101v has to be installed at a position away from the ceiling 103, that is, at a lower height, as indicated by a virtual line in FIG.

Eventually, when a portrait image is enlarged and displayed using the conventional projector (101), it is necessary to set the installation posture in a vertical position as in the projector 101v, and the projector is installed at a lower position with respect to the ceiling. In some applications, there is a difficulty in installation, such as the necessity for the projector to enter the sight of the audience.

An object of the present invention is to provide an optical device and an optical converter that solve the problems existing in the background art.

In order to solve the above-described problem, the optical device P according to the present invention projects an image by projecting the optical device main body 2 excluding the optical system and the emitted light emitted from the optical device main body 2 onto the projection surface 4. When configuring an optical device including an optical system having a projection lens unit 3 for display, an image Vs of a predetermined angle related to the emitted light Co from the optical device main unit 2 is at least perpendicular to the optical axis as a rotation center. An image angle conversion unit 8 that converts the rotated image Vt, a projection lens unit 3 disposed in front of the light advance direction Fc of the image angle conversion unit 8, and the projection lens unit 3 that supports the projection lens unit 3 It is characterized by comprising an optical system 5 having a lens shift mechanism 7 that is displaced in the vertical direction Fv and / or the horizontal direction Fh.

On the other hand, in order to solve the above-described problem, the optical converter 1 according to the present invention is attached to and detached from the optical device main body 2 excluding the optical system, and the emitted light emitted from the optical device main body 2 is projected surface portion. 4 is an optical converter that constitutes a predetermined optical system by being combined with a projection lens unit 3 that projects an image and displays an image, and an image Vs of a predetermined angle related to the emitted light Co from the optical device main unit 2 is obtained. An image angle conversion unit 8 that converts the image Vt to an image Vt that is rotated at least in a right angle direction with the optical axis as a rotation center, and a projection lens unit 3 disposed in front of the light advance direction Fc of the image angle conversion unit 8 The projection lens unit 3 includes a lens shift mechanism unit 7 that displaces the projection lens unit 3 in the vertical direction Fv and / or the horizontal direction Fh.

In this case, according to a preferred aspect of the invention, the optical system 5 is caused to move the substantial position Xv of the display panel unit Ppp to the actual position Xs of the display panel unit Ppp built in the optical device main body 2. It is possible to provide a relay lens unit 6 that shifts forward in the direction Fc and causes the output light Co from the display panel unit Ppp to enter the image angle conversion unit 8. The relay lens unit 6 has an actual arrangement position. To have a scaling characteristic that reduces an image displayed by the light emitted from the display panel at the substantial position Xv by an arbitrary magnification with respect to the image displayed by the light emitted from the display panel Ppp at Xs. Is desirable. Further, the image angle conversion unit 8 can be constituted by a combination of a plurality of reflecting surfaces 8am, 8bm, 8cm, for example, a prism unit 8u in which a plurality of

prism members

8a, 8b, 8c are combined. 8u can be constituted by three

prism members

8a, 8b, and 8c arranged along the optical path. On the other hand, the prism unit 8u is provided with an image angle changing function capable of changing the angle of the image Vs to an arbitrary angle by rotating at least a part of the prism members 8a ... around the optical axis. Is also possible. Further, the image angle conversion unit 8 can be provided with a back focus adjustment mechanism unit 12 capable of adjusting the back focus with respect to the optical device main body unit 2 on the emission side. The lens shift mechanism unit 7 may be integrally provided with the projection lens unit 3 on the emission side.

According to the optical device P and the optical transducer 1 according to the present invention having such a configuration, the following remarkable effects can be obtained.

(1) An image angle conversion unit 8 that converts an image Vs of a predetermined angle related to the emitted light Co from the optical device main body 2 into an image Vt that is rotated at least in a right angle direction with the optical axis as a rotation center, and this image Since it includes the lens shift mechanism unit 7 that supports the projection lens unit 3 disposed in front of the light advance direction Fc of the angle conversion unit 8 and displaces the projection lens unit 3 in the vertical direction Fv and / or the horizontal direction Fh. For example, even when portrait shooting is performed with the video camera set to a vertical screen, an image shot by the video camera can be displayed as it is while the optical device P such as a projector is in a general horizontal state, Even when such a display is performed, it is possible to avoid a problem that the image quality is unnecessarily lowered.

(2) The optical converter 1 is attached to and detached from the optical device main body 2 excluding the optical system, and the projected light Co emitted from the optical device main body 2 is projected onto the projection surface 4 to display an image. Since the predetermined optical system 5 is configured by combining with the lens unit 3, the optical converter 1 can be configured as an independent unit. Therefore, it can be used by being retrofitted to an optical apparatus P such as an existing projector provided with the interchangeable projection lens unit 3 and is excellent in versatility and developability.

(3) According to a preferred embodiment, the optical system 5 has the substantial position Xv of the display panel part Ppp in front of the light traveling direction Fc with respect to the actual arrangement position Xs of the display panel part Ppp built in the optical device main body 2. If the relay lens unit 6 for allowing the light Co emitted from the display panel unit Ppp to enter the image angle conversion unit 8 is provided, the substantial position Xv of the display panel unit Ppp is set to the front of the optical device main body unit 2. In particular, since it is possible to shift to the outside of the optical device main body 2, the lens shift mechanism unit 7 is not increased in size even when combined with the lens shift mechanism unit 7. It is possible to easily and flexibly cope with selection of the arrangement position of the shift mechanism unit 7 or selection of a shift range (shift rate).

(4) According to a preferred embodiment, the output light from the display panel unit at the substantial position Xv with respect to the image displayed on the relay lens unit 6 by the output light Co from the display panel unit Ppp at the actual arrangement position Xs. If the zoom lens has a scaling characteristic that reduces the image displayed by an arbitrary magnification, the shift range (shift rate) of the image (screen) projected on the projection surface portion 4 is accompanied by a change of the lens shift mechanism portion 7. Since the optical device P such as a projector can be installed at a higher (lower) height relative to the projection surface portion 4 or at a further left and right position, the projection surface portion 4 can be easily enlarged. On the other hand, the installation property (flexibility of installation) of the optical device P can be remarkably improved, for example, it can be installed at a closer position.

(5) According to a preferred embodiment, if the image angle conversion unit 8 is configured by combining a plurality of reflecting surfaces 8am, 8bm, and 8cm, a plurality of

prism members

8a, 8b, 8c and a plurality of mirror members are combined. The image angle conversion unit 8 is excellent in versatility and expansibility without being limited to specific parts.

(6) If the image angle conversion unit 8 is configured by a prism unit 8u in which a plurality of

prism members

8a, 8b, and 8c are combined according to a preferred aspect, the target image angle conversion unit 8 can be easily obtained. In addition, a stable and accurate image angle conversion unit 8 can be configured.

(7) If the prism unit 8u is constituted by three

prism members

8a, 8b, and 8c arranged along the optical path according to a preferred embodiment, the viewpoints of low cost, light weight, small compactness, translucency, etc. Therefore, it can be implemented as the most desirable mode in carrying out the present invention.

(8) An image in which the angle of the image Vs can be changed to an arbitrary angle by rotating at least a part of the

prism members

8a, 8b, and 8c about the optical axis as a rotation center in the prism unit 8u according to a preferred embodiment. If the angle changing function is provided, when the prism unit 8u is constituted by the

prism members

8a, 8b, 8c, at least a part of the

prism members

8a, 8b, 8c is assembled so as to be rotatable about the optical axis as a rotation center. Since it can be realized by attaching, etc., it can respond flexibly and flexibly to various installation locations of the optical device P, the form of the projected surface portion 4, and various performances for the projected image, and relatively easily. Can be implemented.

(9) According to a preferred aspect, if the image angle conversion unit 8 is provided with a back focus adjustment mechanism unit 12 capable of adjusting the back focus with respect to the optical device main body unit 2 on the emission side, various optical devices having different back focus are provided. Since the back focus can be easily adjusted on the optical converter 1 side with respect to the main body 2 as well, it can be constructed as a highly versatile optical converter 1 and has high accuracy with respect to the mounted optical device main body 2. An optimal back focus can be set.

(10) If the projection lens unit 3 is integrally provided on the exit side of the lens shift mechanism unit 7 according to a preferred embodiment, the projection lens unit 3 can be designed as a dedicated projection lens for the optical converter 1. The optical converter 1 can be optimized, for example, an optimal optical converter 1 in which the projection lens unit 3 is matched with the relay lens unit 6 and the lens shift mechanism unit 7 can be constructed.

An external plan view of an optical converter according to a preferred embodiment of the present invention, An external plan view showing a state in which the optical converter is mounted on a projector which is an optical device, A front view showing a part of a projector equipped with the optical converter, External perspective view of the optical converter, Schematic diagram showing an installation example using a ceiling-mounted projector equipped with the optical converter, Lens data table of the relay lens unit provided in the optical converter, A perspective view of an image angle conversion unit provided in the optical converter, An exploded perspective view of the image angle conversion unit, Side cross-sectional view showing the upper half of the back focus adjustment mechanism provided in the optical converter, An external perspective view showing an example of a projector that can be equipped with the optical converter, Block configuration diagram showing an example of an optical system and a signal system of a projector that can be equipped with the optical converter, The schematic block diagram which shows an example of the optical system inside the projector which can mount | wear with the optical converter, A flowchart showing the function of each part of the optical converter step by step, Functional explanatory diagram of a relay lens unit provided in the optical converter, Functional explanatory diagram of an image angle converter provided in the optical converter, Schematic configuration diagram for explaining the operation of the optical system including the optical converter,

DESCRIPTION OF SYMBOLS 1: Optical converter, 2: Optical apparatus main-body part, 3: Projection lens part, 4: Projection surface part, 5: Optical system, 6: Relay lens part, 7: Lens shift mechanism part, 8: Image angle conversion part, 8a: prism member, 8b: prism member, 8c: prism member, 8u: prism unit, 8am: reflecting surface, 8bm: reflecting surface, 8cm: reflecting surface, 12: back focus adjusting mechanism, P: optical device, Pp: Projector, Ppp: Display panel section, Vh: Image, Vs: Horizontal image, Vt: Vertical image, Co: Emission light, Fc: Light direction, Fv: Vertical direction, Fh: Horizontal direction, Xs: Arrangement Position, Xv: substantial position

Next, the best embodiment according to the present invention will be given and described in detail with reference to the drawings.

First, in order to facilitate understanding of the optical converter 1 according to the present invention, an outline of the optical device P that can use the optical converter 1 will be described with reference to FIGS. 1 and 10 to 12. In the embodiment, a general-purpose projector Pp is shown as an example of the optical device P.

As shown in FIG. 10, the projector Pp includes a projector main body 2 p that constitutes the optical device main body 2. The illustrated projector main body 2p is covered with a rectangular parallelepiped cabinet 21 having a relatively low height, and a front plate 21f of the cabinet 21 has a lens mounting opening 21h. Reference numeral 3 denotes an interchangeable lens type projection lens unit. As shown in FIG. 1, a mount unit 3m provided at the rear end of the projection lens unit 3 is inserted into the cabinet 21 through the lens mounting opening 21h. It is mounted on the mount 2m (FIG. 1) on the projector body 2p side. The above is the overall appearance configuration of the projector Pp. In FIG. 10, Ppp indicated by a dotted line indicates a display panel unit such as a DMD (digital mirror device) or a liquid crystal panel built in the projector main body 2p, and a predetermined back focus is ensured for the projection lens unit 3. The mounting position Xs is mounted in a fixed state.

On the other hand, FIG. 11 shows a block configuration of an optical system and a signal system in the projector main body 2p. In FIG. 11, 21 indicates the above-described cabinet, 3 indicates the above-described projection lens unit, and Ppp indicates the above-described display panel unit. The projector main body 2p includes an illumination optical unit 31 including a display panel unit Ppp disposed on the upstream side in the light traveling direction with respect to the projection lens unit 3, and a light source unit 32 is disposed at an upstream source of the illumination optical unit 31. . The light source unit 32 to the projection lens unit 3 constitute an optical system in the projector body 2p. In addition, while 33 shows the panel drive part connected to the display panel part Ppp, 34 shows the power supply part for supplying electric power to each required part including the light source part 32. FIG.

FIG. 12 shows a configuration example of an optical system in the projector main body 2p. The optical system illustrated in FIG. 12 includes an illumination optical system 51, a color separation optical system 52, and a relay optical system 53, two

condenser lenses

54 and 55, three

liquid crystal panels

56, 57, and 58, and color synthesis. A prism 59 and a projection lens 3 are provided. In this case, the illumination optical system 51 includes a light source unit 32 in which a white lamp 32o is housed in a reflector 32r, and the first array lens 61, the second array lens 62, and the polarization are arranged downstream of the light source unit 32 in the light traveling direction. A conversion element 63 and a condensing lens 64 are sequentially arranged. The color separation optical system 52 is arranged downstream of the condenser lens 64 to reflect the R light and transmit the G light and B light, and the reflected light (R light) of the dichroic mirror 65. The R light reflected by the reflecting mirror 66 is transmitted through the condenser lens 55. Further, the color separation optical system 52 includes a dichroic mirror 67 that declinates G light that is transmitted through the dichroic mirror 65 and transmits B light, and the reflected light (G light) from the dichroic mirror 67 is a condenser lens. 54 is transmitted. On the other hand, the relay optical system 53 is arranged on the downstream side of the dichroic mirror 65. The first relay lens 68 that transmits the B light that is transmitted through the dichroic mirror 65, and the B light that passes through the first relay lens 68 Reflecting mirror 69, second relay lens 70 through which the B light reflected from the reflecting mirror 69 is transmitted, reflecting mirror 71 from which the B light transmitted through the second relay lens 70 is reflected, and the B light reflected from the reflecting mirror 71 The third relay lens 72 through which the light is transmitted is sequentially arranged.

The R light transmitted through the condenser lens 55 enters the R light incident surface of the color combining prism 59 through the R light liquid crystal panel 56, and the G light transmitted through the condenser lens 54 is transmitted through the G light liquid crystal panel. The B light incident on the G light incident surface of the color combining prism 59 through 57 and the B light transmitted through the third relay lens 72 enters the B light incident surface of the color combining prism 59 through the B light liquid crystal panel 58. Shine. The R light, G light, and B light are combined by the color combining prism 59 and enter the projection lens unit 3 from the emission surface of the color combining prism 59. Therefore, the three liquid crystal panels of the R light liquid crystal panel 56, the G light liquid crystal panel 57, and the B light liquid crystal panel 58 constitute the display panel portion Ppp. As described above, the illustrated optical system constitutes a known general projector element. In FIG. 12, the optical system excluding the light source unit 32 and the projection lens unit 3 constitutes the illumination optical unit 31 described above. In FIG. 12, reference numeral 4 denotes a projection surface using a flat screen.

Further, as shown in FIG. 11, the projector body 2p includes a cooling unit (cooling fan or the like) 35 for cooling the inside of the cabinet 21 including the light source unit 33, a video signal input / output unit including a video signal input unit and an output unit. 36, an audio signal input / output unit 37 including an audio signal input unit and an output unit, a communication unit 38 for exchanging communication with the outside, a control unit 39 for performing various control processes including a CPU, a nonvolatile memory, a RAM, and the like. Including an internal memory 40, an operation unit 41 for performing various inputs from an operation panel desired externally, an image adjustment unit 42 capable of performing various adjustments related to images, a storage unit 43, and the like. , Signal lines, power supply lines, etc., are connected via various connection lines 44 to form a known general projector element.

Next, the configuration of the optical converter 1 according to the present embodiment will be specifically described with reference to FIGS. 1 to 9 and FIG.

As shown in FIGS. 1 and 2, the optical converter 1 is roughly divided into a relay lens unit 6, an image angle conversion unit 8, and a lens shift mechanism unit 7 in order from the rear side to the front side in front of the light traveling direction Fc. Configure. The relay lens unit 6, the image angle conversion unit 8, and the lens shift mechanism unit 7, which are illustrated as examples, are configured as separate units, and are connected using flange units 6 f, 8 ff, 8 fr, 7 f provided at the front and rear, The whole is configured as an integrated optical transducer 1.

In this case, the relay lens unit 6 sets the substantial position Xv of the display panel unit Ppp with respect to the actual arrangement position Xs of the display panel unit Ppp such as a liquid crystal panel built in the projector body 2p shown in FIG. , A function of shifting forward in the light traveling direction Fc, that is, a relay function. Furthermore, in addition to the relay function, the illustrated relay lens unit 6 converts an image displayed by the emitted light Co from the display panel unit Ppp at the actual arrangement position Xs into an image that enters the relay lens unit 6. On the other hand, it has a scaling characteristic (magnification function) that is reduced by an arbitrary magnification.

In this way, the relay lens unit 6 displays the image displayed by the emitted light Co from the display panel unit Ppp at the actual arrangement position Xs by the emitted light from the display panel unit at the substantial position Xv. If the zoom ratio is reduced by an arbitrary magnification, the shift range (shift rate) of the image (screen) projected on the projection surface section 4 can be easily expanded without changing the lens shift mechanism section 7. Therefore, the optical device P such as a projector can be installed at a higher (lower) height with respect to the projection surface portion 4, or can be installed at positions farther left and right, and with respect to the projection surface portion 4, The installation property (flexibility of installation) of the optical device P can be dramatically improved, for example, it can be installed at a closer position.

The relay lens unit 6 includes a lens barrel 6c as an outer shell, and has a lens-side mount unit 6m that can be attached to and detached from the projector main body 2p at the rear end of the lens barrel 6c. It has a flange portion 6f. The lens barrel 6c is configured by incorporating a lens group in which a plurality of lenses are arranged. Lens data of the exemplified relay lens unit 6 is shown in FIG. The relay lens unit 6 has a magnification set to 0.5. In FIG. 6, nd is the refractive index and νd is the Abbe number. In FIG. 6, the “object plane” in the plane number is the recombination plane.

Therefore, as shown in FIG. 1, the substantial position Xv (position corresponding to the image forming point) of the display panel unit Ppp at the arrangement position Xs inside the projector main body 2p is set outside the projector Pp by the relay lens unit 6. It is possible to shift up to.

The image angle conversion unit 8 has a function of converting a horizontal image into a vertical image with the optical axis as a fulcrum. The configuration of the exemplified image angle conversion unit 8 is shown in FIGS. 2, 7 to 8 and 15. FIG. The image angle conversion unit 8 includes a housing 8h serving as an outer shell. As illustrated in FIG. 1, the image angle conversion unit 8 includes a flange 8fr that is coupled to a flange 6f provided on the lens barrel 6c at the rear end of the housing 8h. The front end has a flange portion 8ff. Further, the housing 8h incorporates a prism unit 8u shown in FIG. 7, which is configured by combining three

prism members

8a, 8b, 8c shown in FIG. As a result, as shown in FIG. 15, the horizontal image Vs (horizontal R) incident on the prism unit 8u can be converted into a vertical image Vt (vertical R) and emitted from the prism unit 8u. Of the three

prism members

8a, 8b, and 8c, 8am, 8bm, and 8cm indicate the reflecting surfaces of the

prism members

8a, 8b, and 8c, respectively.

As described above, if the image angle conversion unit 8 for converting the horizontal image Vs into the vertical image Vt is provided between the relay lens unit 6 and the lens shift mechanism unit 7 with the optical axis as a fulcrum, the video camera can be used. Even when portrait photography is performed on a vertical screen, an image photographed by a video camera can be displayed as it is while the projector Pp is kept in a general horizontal state, and a problem that image quality deteriorates can be avoided. Furthermore, when configuring the image angle conversion unit 8, if the prism unit 8u is formed by combining a plurality of

prism members

8a, 8b, 8c, the target image angle conversion unit 8 can be easily obtained. There is an advantage that a stable and accurate image angle conversion unit 8 can be configured. In particular, as illustrated, if the prism unit 8u is constituted by three

prism members

8a, 8b, and 8c arranged along the optical path, from the viewpoints of low cost, light weight, small size compactness, translucency, and the like. Since it can be the most advantageous configuration, it can be implemented as the most desirable mode in carrying out the present invention.

By the way, as shown in FIG. 8, the image angle conversion unit 8 forms a prism unit 8u by combining a plurality of

prism members

8a, 8b, 8c. Is provided with an image angle changing function capable of changing the angle of the image Vs to an arbitrary angle by rotating at least a part of the prism member 8a... You can also. In this case, a support structure that can rotate relative to the

prism members

8a, 8b, and 8c without attaching the contact surfaces of the

prism members

8a, 8b, and 8c by bonding or the like is provided. Good. If such an image angle changing function is provided, it is possible to respond flexibly and flexibly to various installation locations of the optical device P and the form of the projected surface part 4, and various performances for the projected image, etc. There is an advantage that it can be implemented relatively easily.

On the other hand, the lens shift mechanism portion 7 includes a support plate 7s that also serves as a flange portion 7f coupled to the flange portion 8ff provided in the housing 8h at the rear end, and an operation mechanism (drive not shown) is provided on the front surface of the support plate 7s. The X direction movable platen 7x that is displaced in the X direction is supported by the mechanism), and the Y direction movable platen 7y that is displaced in the Y direction by the operation mechanism (drive mechanism) (not shown) is supported on the front surface of the X direction movable plate 7x. . The front surface of the Y-direction movable plate 7y is integrally provided with a mount portion 7m to which the projection lens portion 3 is attached and detached.

Further, as shown in FIG. 1, a back focus adjustment mechanism section 12 that can adjust a back focus with respect to the projector main body section 2p on the emission side of the image angle conversion section 8 (the light incident side with respect to the lens shift mechanism section 7). Is provided. FIG. 9 shows a cross-sectional structure of the upper half of the back focus adjustment mechanism 12. The back focus adjustment mechanism 12 includes a first fixed cylinder 81 provided on the image angle converter 8 side and a second fixed cylinder 82 provided on the lens shift mechanism 7 side. The outer peripheral surface is inserted into the inner peripheral surface of the second fixed cylinder portion 82, and the second fixed cylinder portion 82 has a plurality of guides that are long in the front-rear direction (optical axis direction). Rotating rollers 84 are provided in the first fixed cylinder portion 81 and engaged with the guide holes 83 to be guided. As a result, the second fixed cylinder portion 82 is allowed only displacement in the front-rear direction (optical axis direction) relative to the first fixed cylinder portion 81.

The first fixed cylinder part 81 and the second fixed cylinder part 82 are provided with

male screw parts

81p and 82n using helicoid screws each having a large diameter, and the first fixed cylinder part 81 and the second fixed cylinder part 82. An adjustment ring 85 is formed that has

female thread portions

85p and 85n using helicoid screws that are threaded into the

male thread portions

81p and 82n on the inner peripheral surface. In this case, since the screw forming directions of the

male screw portions

81p and 82n are in a forward / reverse relationship, if the adjustment ring 85 is rotated in the forward direction, the first fixed tube portion 81 and the second fixed tube portion 82 are relative to each other. If the first fixed cylinder part 81 and the second fixed cylinder part 82 are relatively moved, the first fixed cylinder part 81 and the second fixed cylinder part 82 are displaced relatively. Thus, the back focus can be easily adjusted by operating the adjustment ring 85. In particular, by arranging the back focus adjustment mechanism unit 12 on the emission side of the image angle conversion unit 8, it is possible to correct the overall distance from the emission side of the image angle conversion unit 8 to the display panel unit Ppp.

Therefore, if such a back focus adjustment mechanism section 12 is provided, the back focus can be easily adjusted on the optical converter 1 side even for various projector main body sections 2p with different back focus. There is an advantage that it can be constructed as a high optical converter 1 and that an optimal back focus with high accuracy can be set for the mounted projector body 2p.

Next, the usage method and function of the optical transducer 1 according to the present embodiment will be described with reference to FIGS.

First, a method of using the optical converter 1 will be described with reference to FIGS. The optical converter 1 is a general projector Pp that includes a projector main body 2p and a projection lens unit 3 that projects an emitted light Co emitted from the projector main body 2p onto a screen unit 4 to display an image. It can be used in combination with the projection lens unit 3 provided for Pp.

In use, first, as shown in FIG. 1, the projection lens unit 3 attached to the projector body 2p is removed from the projector body 2p of the projector Pp. Then, the removed mount portion 3m of the projection lens portion 3 is attached to the mount portion 7m at the front end of the optical converter 1 prepared in advance. FIG. 4 shows this state, and an arrow D1 in FIG. 1 shows an image of this operation. 1 to 3, reference numeral 21 denotes a cabinet of the projector

main body

2p, 21f denotes a front plate in the

cabinet

21, and 21h denotes a lens mounting opening provided in the front plate 21f.

On the other hand, the optical converter 1 equipped with the projection lens unit 3 attaches the mount 6m provided at the rear end to the mount 2m of the projector body 2p. 2 and 3 show this state. Therefore, the optical system including the projection lens unit 3 and the optical converter 1 constitutes the entire optical system 5 in the projector Pp. In FIG. 1, an arrow D2 shows an image of this operation. Thereby, the projector Pp that is already installed can be changed to the projector Pp equipped with the optical converter 1 according to the present embodiment, and in particular, used as a projector Pp for projecting and displaying a portrait image. it can.

Next, the overall function (action) of the projector Pp including the optical converter 1 will be described with reference to FIGS. The overall function will be described step by step with reference to the flowchart shown in FIG. 13 for the projector Pp installed at the fashion show venue shown in FIG. 5 as an example.

In this case, as shown in FIG. 5, the projector Pp is mounted horizontally on the ceiling 103 of the venue 101 via the hanging metal fittings 102 and is enlarged by a portrait image on the vertically long screen portion 4 on the wall surface behind the stage. Demonstrate the function to display. In addition, it is assumed that the subject (person 104) on the stage is photographed as a vertically long image, that is, a vertically long screen by a video camera (not shown) that is 90 [°] wide. The screen unit 4 may be a case where a separate screen is installed on the wall surface, or a case where the white wall surface is used as it is as a screen.

First, a vertically long image (vertical screen) is captured by the video camera (step S1). Therefore, the image data of the subject that is a vertically long image is in a landscape orientation in which the orientation of the subject is rotated by 90 °. On the other hand, image data based on photographing is transmitted to the projector Pp and given to the input unit of the projector Pp (projector body 2p) (step S2). As a result, the projector main body 2p emits outgoing light based on the image Vh in which the subject is turned sideways.

Further, the emitted light Co emitted from the projector main body 2p enters the relay lens unit 6 in the optical converter 1 according to the present embodiment, and passes through the relay lens unit 6 (step S3). In the relay lens unit 6, the substantial position Xv of the display panel unit Ppp is shifted forward in the light advance direction Fc with respect to the actual arrangement position Xs of the display panel unit Ppp based on the lens data shown in FIG. In addition, an image displayed by the emitted light emitted from the substantial position Xv of the display panel unit Ppp is further changed to an image displayed by the emitted light Co emitted from the display panel unit Ppp at the actual arrangement position Xs. On the other hand, the image is reduced by an arbitrary magnification (illustration is 0.5 times).

FIG. 14B schematically shows an image Vs obtained by reducing an image based on the emitted light Co emitted from the projector main body 2p by a predetermined magnification. In this case, the orientation of the subject in the image Vs is a horizontal orientation rotated by 90 ° as indicated by the characters “horizontal R” shown in FIG. In FIG. 14A, the image Vh before the reduction is shown in an image form for comparison with the image Vs after the reduction.

Furthermore, the image Vs emitted from the relay lens unit 6 enters the prism unit 8 u constituting the image angle conversion unit 8. Then, by passing through the prism unit 8u (image angle conversion unit 8), as shown in FIG. 15, the horizontal image Vs is rotated by 90 ° around the optical axis as a fulcrum, and the vertical image Vt (Step S4). That is, as shown in FIG. 15, the lateral image Vs incident on the prism member 8a in the horizontal direction is reflected by the reflecting surface 8am of the prism member 8a and is emitted upward in the direction perpendicular to the incident direction. Then, the light enters the next prism member 8b as the image Vm1. Since the prism member 8b has a different orientation with respect to the prism member 8a, the incident light incident on the prism member 8b is reflected rightward in the horizontal direction by the reflecting surface 8bm of the prism member 8b. The image Vs reflected by the reflecting surface 8bm is incident on the next prism member 8c as a vertical image Vm2. Since the prism member 8c has a different orientation with respect to the prism member 8b, the incident light incident on the prism member 8c is reflected forward by the reflecting surface 8cm of the prism member 8c in the horizontal direction and converted into the vertical direction. The image Vt relating to “R” is emitted from the prism member 8c. In this way, the horizontal image Vs incident on the prism unit 8u is rotated by 90 [deg.] Around the optical axis by the prism unit 8u and converted into the vertical image Vt.

Next, the emitted light (image Vt) emitted from the prism unit 8u (image angle conversion unit 8) passes through the lens shift mechanism unit 7 (step S5). The lens shift mechanism unit 7 performs shift adjustment with respect to a screen position for displaying an image in the X direction (horizontal direction) and the Y direction (vertical direction).

Incidentally, in this case, since the image Vh is reduced by a predetermined magnification (for example, 0.5 times) by the relay lens unit 6, the shift range of the reduced image Vt (Vs) is greatly enlarged. 14A shows the shift range in the case of the image (screen) Vh, and FIG. 14B shows the shift range in the case of the image (screen) Vs. Note that symbol A is an effective image circle. In the case of the image Vh, as shown in (a), the shift range in the X direction is the range indicated by the images Vhp and Vhq, and the shift range in the Y direction is the range indicated by the images Vhu and Vhd. On the other hand, in the case of the image Vs, as shown in (b), the shift range in the X direction is the range indicated by the images Vsp and Vsq, and the shift range in the Y direction is the range indicated by the images Vsu and Vsd. . Thus, the shift range of the reduced image Vs can be greatly enlarged with respect to the image Vh before reduction.

On the other hand, the image Vt (light emitted from the prism unit 8u) that has passed through the lens shift mechanism unit 7 enters the projection lens unit 3 and passes through the projection lens unit 3 (step S6). The image Vt transmitted through the projection lens unit 3 is projected on the screen unit 4. At this time, the image Vt is adjusted by various adjustment mechanisms including a zooming adjustment mechanism and a focusing adjustment mechanism provided in the projection lens unit 3. As a result, the optimally adjusted image Vt is displayed on the screen unit 4.

Note that FIG. 16 shows a schematic image of the entire configuration including the optical transducer 1 with particular attention to the optical system 5.

As shown in the figure, a horizontally long screen image V1 (image is horizontally oriented) by the emitted light Co emitted from the display panel unit Ppp is incident on the prism unit 8u via the relay lens unit 6 described above, and the inside of the prism unit 8u. In FIG. This image formation becomes the first image formation surface, and the screen image V2 on the first image formation surface becomes a vertically long screen rotated 90 [°] as shown in FIG.

This screen image V2 is reduced (illustration is 0.5) by the scaling function of the relay lens unit 6. This reduction rate can correspond to the vertical shift of the lens shift mechanism unit 7. The screen image V2 at this time is a screen that is vertically inverted with respect to the final screen (screen image V3) that is enlarged and projected on the screen unit 4.

Then, the screen image V2 imaged in the prism unit 8u is enlarged and projected through the projection lens unit 3 onto the screen unit 4 serving as the second imaging surface. The screen image enlarged and projected on the screen unit 4 is V3 in FIG. 16, that is, a vertically long formal screen image V3. In addition, the number of lenses, the curvature, the configuration, and the like in various lens groups including the projection lens unit 3 and the relay lens unit 6 illustrated in FIG. 16 are schematically illustrated, and can be appropriately set according to various modes. .

As described above, the optical converter 1 according to the present embodiment has, as a basic configuration, the image Vs having a predetermined angle related to the emitted light Co from the projector main body 2p at least in the perpendicular direction with the optical axis as the rotation center. An image angle conversion unit 8 that converts the rotated image Vt and a projection lens unit 3 disposed in front of the light advance direction Fc of the image angle conversion unit 8 are supported to support the projection lens unit 3 in the vertical direction Fv and / or the horizontal direction. Since the lens shift mechanism unit 7 that is displaced in the direction Fh is provided, the optical device P such as a projector can be used in a general horizontal direction even when portrait photography is performed with a video camera, for example, a vertical screen. The image captured by the video camera can be displayed as it is in the mounted state, and the problem that the image quality is unnecessarily lowered even when such display is performed can be avoided.

The optical converter 1 is attached to and detached from the projector main body 2p excluding the optical system, and the projection lens unit 3 displays an image by projecting the emitted light Co emitted from the projector main body 2p onto the projection surface 4. Since the predetermined optical system 5 is configured by combining the two, the optical converter 1 can be configured as an independent single unit. Therefore, it can be used by being retrofitted to an optical apparatus P such as an existing projector provided with the interchangeable projection lens unit 3 and is excellent in versatility and developability.

Next, a modified embodiment of the optical transducer 1 according to the present invention will be described with reference to FIG. 1, FIG. 4, FIG. 13 to FIG.

First, the first modified embodiment will be described. The optical converter 1 shown in FIG. 1 is used in combination with a general projector Pp including a projector main body 2p and a projection lens unit 3, and in particular, the projection lens unit 3 attached to the projector Pp. Is used as it is. On the other hand, the first modified embodiment is an optical converter 1 that does not use the projection lens unit 3 provided in the projector Pp. That is, the projection lens unit 3 is provided on the exit side of the lens shift mechanism unit 7 provided in the optical converter 1 shown in FIG. 1, and the overall configuration is the same as that shown in FIG. Become. Therefore, according to the optical converter 1 according to the first modified embodiment, the projection lens unit 3 attached to the projector Pp and the optical converter 1 according to the first modified embodiment are used only by being exchanged. be able to. According to the first modified embodiment configured as described above, the projection lens unit 3 can be designed as a dedicated projection lens for the optical converter 1, and therefore the projection lens unit 3 is shifted from the relay lens unit 6 and the lens shift. There is an advantage that the optical converter 1 can be optimized, for example, an optimal optical converter 1 matched with the mechanism unit 7 or the like can be constructed.

Next, a second modified embodiment will be described. In the second modified embodiment, the optical converter 1 is integrated in advance with the projector Pp. Therefore, the projector integrally including the optical converter 1 in the second modified embodiment constitutes the projector Pp according to the present invention. That is, the projector Pp configured as the second modified embodiment includes a projector main body 2p excluding the optical system, and a projection lens unit that projects an emitted light emitted from the projector main body 2p on the screen unit 4 to display an image. When the projector is provided with the optical system having 3, the substantial position Xv of the display panel part Ppp is set to the light traveling direction Fc with respect to the actual arrangement position Xs of the display panel part Ppp built in the projector main body part 2p. A relay lens unit 6 that shifts forward, a projection lens unit 3 disposed in front of the light traveling direction Fc of the relay lens unit 6, and supports the projection lens unit 3 to make the projection lens unit 3 in the longitudinal direction Fv and / or The optical system 5 includes a lens shift mechanism 7 that is displaced in the lateral direction Fh.

Although the best embodiment (modified embodiment) has been described in detail above, the present invention is not limited to such an embodiment, and the present invention is not limited to such a configuration, shape, material, quantity, numerical value, and the like. Any change, addition, or deletion can be made without departing from the scope of the above.

For example, the case where the image angle conversion unit 8 is configured by a combination of a plurality of

prism members

8a, 8b, and 8c has been exemplified. However, the image angle conversion unit 8 is configured by combining a plurality of mirror members. It can be replaced by means. Therefore, the image angle conversion unit 8 can be configured by combining a plurality of

prism members

8a, 8b, 8c and a plurality of mirror members by configuring with a plurality of reflecting surfaces 8am, 8bm, and 8cm. Without being limited, it can be used as the image angle conversion unit 8 excellent in versatility and development. Further, the relay lens unit 6 is a relay function that shifts the substantial position Xv of the display panel unit Ppp to the front of the light traveling direction Fc with respect to the actual arrangement position Xs of the display panel unit Ppp built in the projector main body 2p. It is sufficient to have a zooming function as shown in the example. At this time, in the case of providing a scaling function, it is desirable to reduce the image by an arbitrary magnification, but this does not exclude the case of equal magnification or enlargement. In addition, although 0.5 magnification was illustrated as a magnification to reduce, it can implement by various magnifications, such as 0, 3 times, 0.8 times. On the other hand, the lens shift mechanism unit 7 is configured to be displaced in both the vertical direction Fv and the horizontal direction Fh. However, the configuration in which the lens shift mechanism unit 7 is displaced only in either the vertical direction Fv or the horizontal direction Fh is not excluded. Further, as the display panel unit Ppp, display panels based on various display methods such as a display panel based on the DMD method, a liquid crystal panel based on the liquid crystal method, a display panel based on the DLP method, and the like can be applied.

The optical converter according to the present invention can be used for various projectors having a similar display function including various projectors having a detachable projection lens unit, and the optical device is a portrait object such as a portrait photographed person. It can be used for various display applications including the case of projecting and displaying (image).

Claims

An optical device comprising: an optical device main body excluding an optical system; and an optical system having a projection lens unit that projects an emitted light emitted from the optical device main body onto a projection surface portion to display an image. An image angle conversion unit that converts an image of a predetermined angle related to light emitted from the unit into an image that is rotated at least in a right angle direction with the optical axis as a rotation center, and the image angle conversion unit disposed in front of the light traveling direction An optical apparatus comprising an optical system having a projection lens unit and a lens shift mechanism unit that supports the projection lens unit and displaces the projection lens unit in a vertical direction and / or a horizontal direction.
The optical system shifts the substantial position of the display panel unit forward with respect to the light traveling direction with respect to the actual arrangement position of the display panel unit built in the optical device main body unit, and emits light emitted from the display panel unit. The optical apparatus according to claim 1, further comprising a relay lens unit that allows light to enter the image angle conversion unit.
The relay lens unit can display an image displayed by light emitted from the display panel unit at the substantial position with an arbitrary magnification with respect to an image displayed by light emitted from the display panel unit at the actual arrangement position. The optical apparatus according to claim 2, further comprising a zooming characteristic for reducing the size.
3. The optical apparatus according to claim 1, wherein the image angle conversion unit is configured by a combination of a plurality of reflecting surfaces.
The optical apparatus according to claim 4, wherein the image angle conversion unit includes a prism unit in which a plurality of prism members are combined.
6. The optical apparatus according to claim 5, wherein the prism unit includes three prism members arranged along an optical path.
The prism unit includes an image angle changing function capable of changing an angle of an image to an arbitrary angle by rotating at least a part of the prism member about an optical axis as a rotation center. Item 7. The optical device according to Item 5 or 6.
A predetermined optical system is configured by attaching to and detaching from the optical device main unit excluding the optical system, and combining the projection light unit that projects the emitted light emitted from the optical device main unit onto the projection surface unit and displays the image. An image angle conversion unit that converts an image of a predetermined angle related to light emitted from the optical device main body into an image rotated at least in a right angle direction with the optical axis as a rotation center, An optical conversion comprising: a lens shift mechanism unit that supports the projection lens unit disposed in front of the image angle conversion unit in the light advancing direction and displaces the projection lens unit in the vertical direction and / or the horizontal direction. vessel.
The optical system shifts the substantial position of the display panel unit forward with respect to the light traveling direction with respect to the actual arrangement position of the display panel unit built in the optical device main body unit, and emits light emitted from the display panel unit. The optical converter according to claim 8, further comprising a relay lens unit that allows light to enter the image angle conversion unit.
The relay lens unit can display an image displayed by light emitted from the display panel unit at the substantial position with an arbitrary magnification with respect to an image displayed by light emitted from the display panel unit at the actual arrangement position. 10. The optical converter according to claim 9, further comprising a zooming characteristic for reducing the size.
The optical converter according to claim 8 or 9, wherein the image angle conversion unit is configured by a combination of a plurality of reflection surfaces.
12. The optical converter according to claim 11, wherein the image angle conversion unit includes a prism unit in which a plurality of prism members are combined.
13. The optical converter according to claim 12, wherein the prism unit is constituted by three prism members arranged along an optical path.
The said prism unit is provided with the image angle change function which can change the angle of an image by rotating at least one part of the said prism member by using an optical axis as a fulcrum. Optical transducer.
10. The optical converter according to claim 8, wherein the image angle conversion unit includes a back focus adjustment mechanism unit capable of adjusting a back focus with respect to the optical device main body unit on an emission side.
The optical converter according to claim 8, wherein the lens shift mechanism unit is integrally provided with the projection lens unit on an emission side.