WO2013054634A1 - 立体画像投影装置、立体画像投影方法、及び立体画像投影システム - Google Patents
立体画像投影装置、立体画像投影方法、及び立体画像投影システム Download PDFInfo
- Publication number
- WO2013054634A1 WO2013054634A1 PCT/JP2012/073476 JP2012073476W WO2013054634A1 WO 2013054634 A1 WO2013054634 A1 WO 2013054634A1 JP 2012073476 W JP2012073476 W JP 2012073476W WO 2013054634 A1 WO2013054634 A1 WO 2013054634A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- image light
- light
- optical system
- image projection
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/363—Image reproducers using image projection screens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0257—Diffusing elements; Afocal elements characterised by the diffusing properties creating an anisotropic diffusion characteristic, i.e. distributing output differently in two perpendicular axes
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/602—Lenticular screens
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
- G03B35/24—Stereoscopic photography by simultaneous viewing using apertured or refractive resolving means on screens or between screen and eye
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/388—Volumetric displays, i.e. systems where the image is built up from picture elements distributed through a volume
- H04N13/393—Volumetric displays, i.e. systems where the image is built up from picture elements distributed through a volume the volume being generated by a moving, e.g. vibrating or rotating, surface
Definitions
- the present invention relates to a stereoscopic image projection apparatus, a stereoscopic image projection method, and a stereoscopic image projection system that project a stereoscopic image.
- Patent Document 1 describes a stereoscopic image projection apparatus that projects an image in a predetermined direction when a hologram is recorded. This stereoscopic image projection apparatus displays a highly reproducible stereoscopic image according to a change in the position of the observer.
- the stereoscopic image projection apparatus described in Patent Document 1 displays a stereoscopic image in a spatial region formed by rotating image light emitted in a predetermined direction. Therefore, there is a tendency that a region where a stereoscopic image is displayed is limited.
- the present invention has been made in view of the above problems, and provides a stereoscopic image projection device, a stereoscopic image projection method, and a stereoscopic image projection system capable of easily expanding a region where a stereoscopic image can be visually recognized. For the purpose.
- a stereoscopic image projection apparatus has an incident surface on which image light is incident and an exit surface on the opposite side of the entrance surface, and the exit direction of the image light on the exit surface and the exit surface are at a predetermined angle.
- a conversion optical system including a plate-like first optical member that changes the traveling direction of image light so as to form a rotation, and rotation for driving the conversion optical system to rotate along the emission surface about a predetermined point on the emission surface
- the driving unit and the rotation axis including the rotation center are erected, and the traveling direction of the image light emitted from the conversion optical system is changed to the first direction along the plane intersecting the rotation axis, and the conversion optical
- An image projection unit that diffuses image light emitted from the system in a second direction along the rotation axis.
- a stereoscopic image projection method is a method of obtaining a stereoscopic image by projecting image light from a conversion optical system that is rotationally driven by a rotational drive unit to an image projection unit, and that provides a perspective on an object.
- Each of a plurality of original images obtained by changing to different positions is divided along one direction of the original image to form a divided image, and from the plurality of divided images, the rotation angle of the conversion optical system, And a selection step of selecting a divided image based on the position of the image light projected on the image projection unit in the image projection unit, and a combining step of creating a projection image for generating image light by combining the selected divided images And a projecting step of generating image light reflecting the projected image and projecting the image light onto the image projecting unit through the conversion optical system, and in the projecting step, the image light emitting unit that continuously emits the image light in a pulse shape
- Images from Is output to the conversion optical system and includes a plate-like optical member having an incident surface on which image light is incident and an exit surface on the opposite side of the incident surface, and the exit direction and exit surface of the image light on the exit surface are predetermined.
- the traveling direction of the image light is changed by a conversion optical system that changes the traveling direction of the image light so as to form an angle, and the conversion optical system is driven to rotate along the exit surface around a predetermined point on the exit surface.
- the image light emitted from the conversion optical system is erected along the rotation axis including the rotation center, and is changed to a first direction along a plane intersecting the rotation axis, and emitted from the conversion optical system.
- the image light is emitted to an image projection unit that diffuses the image light thus processed in the second direction along the rotation axis.
- a stereoscopic image projection system includes an image creation unit that creates a projection image using a plurality of original images obtained by changing the viewpoint of an object to different positions, and the projection image reflects And a plate-like optical member having an incident surface on which the image light is incident and an exit surface on the opposite side of the incident surface.
- a conversion optical system that changes the traveling direction of the image light so that the emission direction of the image light and the emission surface form a predetermined angle, and the conversion optical system along the emission surface with a predetermined point on the emission surface as a rotation center
- a rotational drive unit that rotationally drives and a rotation axis that includes a rotation center, and changes the traveling direction of the image light emitted from the conversion optical system to a first direction along a plane that intersects the rotation axis.
- image light emitted from the conversion optical system An image projection unit that diffuses in a second direction along the rotation axis, and the projection image is composed of a plurality of divided images obtained by dividing the original image along one direction of the original image, and the divided image is converted optically The selection is made based on the rotation angle of the system and the position of the image light projected on the image projection unit in the image projection unit.
- the conversion optical system changes the traveling direction of the image light.
- This conversion optical system rotates about a predetermined point as a rotation center. For this reason, the image light is projected while being scanned around the rotation axis on the image projection unit as the conversion optical system rotates. Then, the image projection unit changes the traveling direction of the projected image light to the first direction.
- the first direction corresponds to a position on the image projection unit and an incident angle to the position. For this reason, when the image light is projected while being scanned on the image projection unit, the image light is projected in different directions according to the position on the image projection unit and the incident angle to the position.
- a stereoscopic image can be displayed.
- the conversion optical system and the image projection unit by using the conversion optical system and the image projection unit, a stereoscopic image can be generated in a wide area away from the conversion optical system. Further, the image projection unit diffuses the projected image light in one direction. Thereby, it becomes possible to extend the area
- the image projection unit may include a diffraction grating. According to this image projection unit, only the image light incident from a specific direction is changed in the first direction. For this reason, even if light enters the image projection unit from a direction other than the incident direction of the image light, the direction is not changed to light traveling in the first direction. Accordingly, it is possible to suppress a reduction in the visibility of the stereoscopic image due to the reflection of disturbance light on the image projection unit.
- the image projection unit may be a reflection hologram including a diffraction grating. According to this image projection unit, it is possible to suppress a reduction in the visibility of a stereoscopic image due to the reflection of disturbance light on the image projection unit.
- the image projection unit may be a transmission hologram including a diffraction grating. According to this image projection unit, it is possible to suppress a reduction in the visibility of a stereoscopic image due to the reflection of disturbance light on the image projection unit. Furthermore, according to this image projection unit, a stereoscopic image can be displayed so as to be superimposed on an actual object.
- the image projection unit may include a reflection plate that reflects image light in the first direction and a diffusion plate that diffuses image light in the second direction, and the reflection plate and the diffusion plate may be stacked. According to this configuration, the image projection unit can be easily formed.
- the diffusion plate may be a lenticular lens including a plurality of cylindrical lenses. According to this configuration, image light can be diffused in one direction.
- a reflection plate may be provided on the lens surface of the diffusion plate. According to this configuration, the functions of the diffusion plate and the reflection plate can be integrated.
- the conversion optical system further includes a second optical member.
- the second optical member converts the image light into parallel light and emits the image light converted into parallel light with respect to the incident surface of the first optical member. Also good.
- the conversion optical system further includes a third optical member, and the third optical member emits image light converged in the third direction with respect to the image projection unit, and the third direction is orthogonal to the rotation axis. It may be a direction along the surface and a direction orthogonal to the emission direction on the emission surface of the first optical member. According to this conversion optical system, a difference in distance from the conversion optical system to the image projection unit is small between the light near the center of the image light and the light near the end of the image light. Therefore, it is possible to suppress the occurrence of distortion of the stereoscopic image due to the difference in distance from the conversion optical system to the image projection unit. Further, the conversion optical system may be a transmission hologram that combines the functions of the first to third optical members. Further, the conversion optical system may be a reflection hologram that combines the functions of the first to third optical members.
- the image projection unit may have a shape curved in a direction perpendicular to the rotation axis. According to such a configuration, it is possible to enlarge the range in which the image light is projected. This makes it possible to project the image light in a direction orthogonal to the direction in which the image light is diffused, that is, in the depth direction. Accordingly, it is possible to further expand the region where the stereoscopic image can be visually recognized.
- the three-dimensional image projection device the three-dimensional image projection method, and the three-dimensional image projection system of the present invention, it is possible to easily expand an area where a three-dimensional image can be visually recognized.
- FIGS. 1 and 2 are diagrams for explaining a configuration of a stereoscopic image projection system 100A including the stereoscopic image projection apparatus 1A according to the first embodiment.
- FIG. 1 is a block diagram for explaining the configuration of a stereoscopic image projection system 100A.
- FIG. 2 is a diagram for explaining the configuration of the stereoscopic image projection system 100A.
- the stereoscopic image projection system 100 ⁇ / b> A includes a stereoscopic image projection apparatus 1 ⁇ / b> A, an image creation unit 2, and an image light emitting unit 3.
- the image creation unit 2 creates a projection image.
- the projected image is an image projected by the image light emitting unit 3.
- the image light is light that reflects the projection image emitted from the image light emitting unit 3. The process of creating a projection image will be described later.
- the position where the image creation unit 2 is arranged is not particularly limited, but is arranged below the stereoscopic image projection apparatus 1A in the first embodiment.
- a computer including a data recording device, a working memory, and a CPU is used.
- the image light emitting unit 3 generates the image light L and emits it toward the stereoscopic image projector 1A.
- the image light L is generated based on the projection image created by the image creation unit 2.
- the image light emitting unit 3 is disposed below the stereoscopic image projector 1A.
- the image light emitting unit 3 may be disposed on the upper side of the stereoscopic image projector 1A.
- the image light emitting unit 3 includes a control unit 3a and a projector 3b.
- Position data indicating a rotation angle which will be described later, is sequentially input from the stereoscopic image projector 1A to the control unit 3a.
- the control unit 3a outputs a projection image to the projector 3b based on this position data.
- the projector 3b generates image light L based on the projection image and emits the image light L toward the stereoscopic image projection apparatus 1A.
- a device capable of continuously emitting the image light L reflecting the projection image in a pulse shape is used.
- a projector incorporating a digital micromirror device (DMD) manufactured by Texas Instruments can be used.
- DMD digital micromirror device
- the image light L is projected every time the conversion optical system 10 ⁇ / b> A described later rotates by 0.7 degrees.
- the projector 3b is configured to be able to project 15000 frames of image light L in at least one second.
- the stereoscopic image projection system 100A includes a mirror 4 for adjusting the optical axis.
- the mirror 4 guides the image light L emitted from the image light emitting unit 3 to the stereoscopic image projector 1A.
- the mirror 4 is disposed at a position where the optical axis AP of the projector 3b and the optical axis AL of the stereoscopic image projector 1A intersect (see FIG. 2).
- the stereoscopic image projection system 100A includes the mirror 4, but the stereoscopic image projection system 100A may not include the mirror 4.
- the image light emitting unit 3 is arranged so that the optical axis AP of the projector 3b overlaps the optical axis AL of the stereoscopic image projection apparatus 1A.
- the stereoscopic image projection apparatus 1A includes a conversion optical system 10A, a rotation drive unit 20, and an image projection unit 30A.
- the conversion optical system 10A changes the traveling direction of the image light L emitted from the projector 3b.
- the conversion optical system 10 ⁇ / b> A is configured to be rotatable by the rotation drive unit 20, thereby shifting the image light L whose traveling direction is changed in the rotation direction and emitting the image light L to the image projection unit 30 ⁇ / b> A.
- the conversion optical system 10 ⁇ / b> A includes a first optical member 11 and a second optical member 12. The first optical member 11 and the second optical member 12 are arranged in the order of the second optical member 12 and the first optical member 11 from the image light emitting unit 3 side.
- the first optical member 11 is a deflection optical plate that changes the traveling direction of the image light L.
- the first optical member 11 has a disk shape that can transmit the image light L.
- the first optical member 11 has an entrance surface 11p and an exit surface 11r.
- the incident surface 11p is a surface on which the image light L is incident.
- the exit surface 11r is a surface that is opposite to the entrance surface 11p and that emits the image light L.
- the first optical member 11 changes the traveling direction of the image light L so that the emission direction C1 of the image light L on the emission surface 11r and the emission surface 11r make a predetermined angle A1.
- the predetermined angle is set based on the shape and size of the image projection unit 30A or the positional relationship between the image projection unit 30A and the conversion optical system 10A. In the first embodiment, the predetermined angle A1 is 68 degrees.
- the first optical member 11 is, for example, a linear prism plate that can change the traveling direction of incident light to a predetermined direction.
- the linear prism plate is a plate-like optical member in which prisms are arranged side by side on a plane.
- the pitch between the prisms is set to 1 mm or less.
- the pitch of the linear prism plate of the first embodiment is 0.3 mm.
- the first optical member 11 may be configured by one linear prism plate that can change the traveling direction of the image light L by a predetermined angle, or may be configured by combining a plurality of linear prism plates.
- the first optical member 11 of the first embodiment is composed of one linear prism plate that can change the traveling direction of the image light L by 22 degrees.
- the first optical member 11 is rotationally driven by the rotational drive unit 20 with the center of the first optical member 11 as the center of rotation. Thereby, the emission direction C1 of the image light L is shifted along the rotation direction.
- the first optical member 11 has a rotation reference member 11a.
- the rotation reference member 11 a is a reference for acquiring the rotation angle of the first optical member 11.
- the rotation reference member 11a is, for example, convex portions arranged at equal intervals on the outer peripheral edge of the disk-shaped first optical member 11.
- the second optical member 12 converts the image light L into parallel light.
- the second optical member 12 is disposed on the image light emitting unit 3 side of the first optical member 11 along the optical axis AL of the incident image light of the stereoscopic image projector 1A. That is, the image light L enters the first optical member 11 after passing through the second optical member 12.
- the second optical member 12 is a Fresnel lens capable of converting light emitted from the focal point into parallel light.
- the Fresnel lens is a lens obtained by dividing a normal lens into parallel regions. Since the Fresnel lens has a plurality of lenses formed on parallel straight lines, it converts the image light L emitted from the focal point into parallel light.
- the Fresnel lens of the first embodiment has, for example, an outer diameter of 300 mm and a focal length of 600 mm.
- the rotation drive unit 20 drives the conversion optical system 10A to rotate in one direction.
- the rotation driving unit 20 rotates the conversion optical system 10A along the emission surface 11r with the center on the emission surface 11r as the rotation axis RA.
- the rotation drive unit 20 includes a control board 21, a servo amplifier 22, a rotation drive mechanism 23, and an encoder 24.
- the control board 21 outputs a drive signal to the servo amplifier 22. Further, the control board 21 calculates a rotation angle of the first optical member 11 based on a numerical value output from an encoder 24 described later, and sends position data indicating the rotation angle to the control unit 3a of the image light emitting unit 3. Is output.
- the servo amplifier 22 rotationally drives the rotational drive mechanism 23 at a desired angular velocity based on the drive signal output from the control board 21.
- the rotation drive mechanism 23 rotates the conversion optical system 10A at a desired angular velocity by supplying electric power from the outside.
- Such a rotation drive mechanism 23 can be realized by an electric motor, a belt drive, a gear, and the like.
- the encoder 24 acquires a numerical value based on the rotation reference member 11 a of the first optical member 11 and outputs it to the control board 21.
- the image projection unit 30A reflects the image light L in a predetermined direction and diffuses the image light L in one direction (second direction).
- the one direction in the first embodiment is a direction along the rotation axis RA.
- the image projection unit 30A is erected along the rotation axis RA including the rotation center, and has a shape curved in a direction perpendicular to the rotation axis RA.
- the image projection unit 30 ⁇ / b> A has a configuration in which a reflection plate 32 and a diffusion plate 33 are stacked on a base 31. Referring to FIG. 4, a reflection plate 32 is formed on the base 31, and a diffusion plate 33 is formed on the reflection plate 32.
- the base 31 has a front surface 31p on which the image light L is projected and a back surface 31r on the opposite side of the front surface 31p.
- glass can be used for PMMA (acrylic) and PC (polycarbonate), which are optically transparent members.
- the base 31 has a predetermined curved shape when viewed from the direction of the rotation axis RA.
- the predetermined curve is, for example, a circle, ellipse, parabola, or hyperbola that is a conic curve.
- the shape of the base 31 in the first embodiment is a shape obtained by partially cutting a cylinder having a diameter of 600 mm.
- the base 31 has a shape in which a predetermined curve extends in the direction of the rotation axis RA and is curved in a direction perpendicular to the rotation axis RA.
- the reflector 32 reflects the image light L incident on the image projection unit 30A.
- an acrylic mirror which is a reflecting material made of synthetic resin can be used.
- the diffusion plate 33 diffuses the image light L in a direction (second direction) along the rotation axis RA of the rotation driving unit 20.
- the diffusion plate 33 is disposed on the reflection plate 32.
- the diffusing plate 33 is, for example, a lenticular lens including a plurality of cylindrical lenses 33a.
- the lenticular lens has a lens surface 33p where the curved surface of the cylindrical lens 33a is exposed, and a non-lens surface 33r on the opposite side of the lens surface 33p.
- the extending direction of the cylindrical lens 33a intersects the direction of the rotation axis RA.
- the lenticular lens is affixed on the reflecting plate 32 of the base 31 using, for example, a double-sided adhesive tape.
- the non-lens surface 33r is pasted so as to face the reflecting plate 32.
- an optical transparent adhesive sheet LUCIACS (registered trademark) CS9621T or LUCIACS (registered trademark) CS9622T manufactured by Nitto Denko Corporation can be used as a double-sided tape.
- FIG. 5 is a flowchart showing main steps of the stereoscopic image projecting method of the first embodiment.
- the stereoscopic image capturing method of the first embodiment includes a dividing step S1, a selecting step S2, a combining step S3, and a projecting step S4.
- FIG. 6A is a diagram for explaining a process of preparing an original image.
- the original image is an image obtained by changing the viewpoint with respect to the object to different positions.
- the original images 42 to 44 are obtained by shooting every 60 degrees within a range of 60 degrees in the right rotation direction and 60 degrees in the left rotation direction. An example is shown.
- the photographed original images 42 to 44 are input to the image creating unit 2.
- the original image may be, for example, an image obtained by taking the actual object 41 as a projection target and photographing the object 41 with a digital camera or the like.
- generated the projection target by computer graphics may be sufficient.
- an image captured by a video camera or the like may be input to the image creation unit 2 in real time.
- FIG. 6B is a diagram for explaining a process of dividing the original image.
- each of the original images 42 to 44 input to the image creating unit 2 is divided along one direction of the original images 42 to 44 to generate divided images.
- One direction in the present embodiment is the vertical direction of the original image.
- the number of divisions is set based on, for example, the shape or size of the image projection unit 30A. Although the original image is divided into three in FIG. 6B, the actual number of divisions may be three or more. For example, the number of divisions may be sixteen or more. There is no particular upper limit to the number of divisions.
- a predetermined image is selected from the divided images (S3: selection step).
- the predetermined image is selected based on the rotation angle of the conversion optical system 10A and the position of the image light L projected on the image projection unit 30A.
- the selection step S3 will be described in more detail.
- the image light L projected from the first optical member 11 onto the image projection unit 30A is reflected by the reflection plate 32 of the image projection unit 30A.
- the image light L is reflected in different directions for each of the positions Pa to Pc projected onto the image projection unit 30A.
- the position of the image light L moves as the conversion optical system 10A rotates. By this movement, the incident angle with respect to the reflecting plate 32 changes at the respective positions Pa to Pc. Accordingly, the image light L is reflected in different directions for each rotation angle of the conversion optical system 10A. Then, an image formed from the original image viewed from each direction is selected as an image for generating each image light L reflected in different directions.
- a part L1 of the image light L emitted from the conversion optical system 10A is reflected in the direction D1 at a reflection angle ⁇ 2 corresponding to the incident angle ⁇ 1 with respect to the image projection unit 30A.
- a part L1 of the image light L needs to reflect a projection image when the object 41 is viewed from the direction D1. Accordingly, one of the divided images 42a to 42c obtained by dividing the original image 42 is selected.
- a part L2 of the image light L emitted from the conversion optical system 10A is reflected in the direction D2.
- a part L2 of the image light L needs to reflect a projection image when the object 41 is viewed from the direction D2. Accordingly, one of the divided images 43a to 43c obtained by dividing the original image 43 is selected.
- step S5 the selected divided images are combined.
- step S5 the selected divided images are combined to form one combined projection image.
- the combined projection image is input to the image light emitting unit 3, and the image light L reflecting the combined projection image is projected onto the image projection unit 30A (S7: projection step).
- the image light L is projected onto the image projection unit 30A via the conversion optical system 10A.
- a stereoscopic image is projected through the above steps.
- FIG. 21 is a diagram for explaining the effect of the stereoscopic image projecting device 90 of the comparative example.
- the stereoscopic image projection device 90 includes an image light emitting unit 91, a conversion optical system 92, and a rotation driving unit 93.
- the conversion optical system 92 includes a first optical unit 92a, a second optical unit 92b, and a diffusion plate 92c.
- the first optical unit 92a converts the image light L into parallel light.
- the second optical unit 92b changes the traveling direction of the image light L converted into parallel light.
- the diffusion plate 92c diffuses the image light L whose traveling direction is changed in a predetermined direction. That is, the stereoscopic image projection device 90 is different from the stereoscopic image projection device 1A of the first embodiment in that it does not include the image projection unit 30A and the conversion optical system 92 includes the diffusion plate 92c. .
- the stereoscopic image projecting device 90 projects the image light L emitted from the image light emitting unit 91 via the conversion optical system 92. If it does so, the advancing direction of the image light L will be changed and it will rotate in the state from which the direction was changed. Accordingly, the stereoscopic image 95 is projected onto the triangular pyramid-shaped space area 94. According to such a stereoscopic image projection device 90, the area where the stereoscopic image 95 is projected is limited to the spatial area 94. Since the spatial region 94 is formed in the vicinity of the surface 92p of the diffusion plate 92c, it is difficult to realize projection as if the stereoscopic image 95 is floating in the air.
- the conversion optical system 10A changes the traveling direction of the image light L to a predetermined direction, so that the image light L is imaged along with the rotation of the conversion optical system 10A.
- the image is projected on the projection unit 30A while being scanned around the rotation axis RA. Since the image projection unit 30A includes the reflecting plate 32, the projected image light L is reflected at a reflection angle corresponding to the incident angle. Since this conversion optical system 10A is rotationally driven by the rotation drive unit 20, the projection position of the image light L in the image projection unit 30A is moved in the rotation direction. In this way, by using the conversion optical system 10A and the image projection unit 30A, a stereoscopic image 35 can be generated in a wide area away from the conversion optical system 10A.
- FIG. 8 is a diagram for explaining the effect of the stereoscopic image projection apparatus 1A.
- FIG. 8A shows the traveling direction of part of the image light L at a predetermined rotation angle.
- the image light L is reflected at a reflection angle corresponding to the incident angle at a predetermined point Pa of the image projection unit 30A, and travels in the direction of the arrow Da.
- FIG. 8B shows a traveling direction of a part of the image light L when the conversion optical system 10A is rotated by a certain angle from the state of FIG. At this time, the image light L reflected at the point Pa is reflected at a reflection angle corresponding to the incident angle, and proceeds in the direction of the arrow Db. Further, FIG.
- FIG. 8C shows a traveling direction of a part of the image light L when the conversion optical system 10A is rotated by a certain angle from the state of FIG. 8B.
- the image light L reflected at the point Pa is reflected at a reflection angle corresponding to the incident angle, and proceeds in the direction of the arrow Dc.
- the image light L is reflected from the image projection unit 30A in different directions. Therefore, a stereoscopic image can be displayed.
- FIG. 9 is a diagram for explaining the effect of the stereoscopic image projection apparatus 1A.
- the image light L projected by the diffusion plate 33 of the image projection unit 30A is diffused in one direction.
- the diffusing plate 33 of the first embodiment is arranged so that the extending direction Dr of the cylindrical lens 33a intersects the rotation axis RA.
- the image light L reflected by the image projection unit 30A is diffused in the direction Dp along the rotation axis RA, so that the vertical region in which the stereoscopic image 35 is visually recognized is expanded in the direction along the rotation axis RA. It becomes possible to do. Therefore, it is possible to easily expand the vertical region in which the stereoscopic image 35 is visually recognized.
- the area where the stereoscopic image 35 is displayed is formed in an area surrounded by the image projection unit 30A. Since the image projection unit 30A is disposed at a predetermined distance from the conversion optical system 10A, the stereoscopic image 35 can be displayed at a position separated from the conversion optical system 10A in the direction of the rotation axis RA. For this reason, the projection as if the stereoscopic image 35 is floating in the air can be realized.
- FIG. 10 is a diagram for explaining the effect of the stereoscopic image projection apparatus 1A from another viewpoint.
- the image projection unit 30A of the stereoscopic image projection apparatus 1A has a shape curved in a direction perpendicular to the rotation axis RA. For this reason, the image light L reflected from the image projection unit 30A is projected onto a region surrounded by the image projection unit 30A. More specifically, the image light L reflected from the image projection unit 30A includes the image projection unit 30A, a surface including the reflection direction Dd of the image light L from the point Pd, and the reflection direction De of the image light L from the point Pe. Is projected onto a region surrounded by a plane including. Therefore, it is possible to extend the region where the stereoscopic image is visually recognized in the so-called depth direction. Therefore, it is possible to further expand the region where the stereoscopic image is visually recognized.
- the point Pd is one end of the image projection unit 30A when the image projection unit 30A is viewed from the direction of the rotation axis RA. From the point Pd, the image light L is reflected in different directions. In the reflected image light L, a direction having a direction component separated from the image projection unit 30A is a reflection direction Dd.
- the point Pe is the other end of the image projection unit 30A when the image projection unit 30A is viewed from the direction of the rotation axis RA. In the reflected image light L from the point Pe, a direction having a direction component away from the image projection unit 30A is the reflection direction De.
- the conversion optical system 10A changes the traveling direction of the image light L to a predetermined direction, so that the image light L is rotated along with the rotation of the conversion optical system 10A. Is projected onto the image projection unit 30A while being scanned around the rotation axis RA. Since the image projection unit 30A includes the reflecting plate 32, the projected image light L is reflected at a reflection angle corresponding to the incident angle. Since this conversion optical system 10A is rotationally driven by the rotation drive unit 20, the projection position of the image light L in the image projection unit 30A is moved in the rotation direction.
- the projected image light L is composed of a selected image selected based on the rotation angle of the conversion optical system 10A and the position of the image light L projected on the image projection unit 30A from the rotation angle in the image projection unit 30A. Reflects the projected image. Therefore, since the image light L corresponding to the directions is projected in different directions, a stereoscopic image with high reproducibility can be displayed even if the position of the observer changes. In this way, by using the conversion optical system 10A and the image projection unit 30A, a stereoscopic image 35 can be generated in a wide area away from the conversion optical system 10A.
- the diffusion plate 33 of the image projection unit 30A diffuses the projected image light L in one direction. Thereby, since the image light L reflected by the image projection unit 30A is diffused in one direction, the region where the stereoscopic image 35 is displayed can be expanded in one direction. Therefore, the area where the stereoscopic image 35 is displayed can be easily expanded.
- a stereoscopic image projection system 100B including the stereoscopic image projector 1B of the second embodiment will be described.
- the stereoscopic image projector 1B according to the second embodiment is different from the reflector 32 and the diffuser plate 33 in that the image projector 30B includes an optical sheet 36 on which a diffraction grating is formed.
- the image projection apparatus 1A is different from the stereoscopic image projection apparatus 1A according to one embodiment.
- Other configurations of the stereoscopic image projector 1B of the second embodiment are the same as those of the stereoscopic image projector 1A of the first embodiment.
- the image projection unit 30B will be described in detail.
- the image projection unit 30 ⁇ / b> B has a base 31 and an optical sheet 36.
- the optical sheet 36 on which the diffraction grating is formed is affixed to the surface 31 p of the base 31.
- a hologram can be used as the optical sheet 36.
- a hologram is a medium on which optical information is recorded using a holographic technique. When this hologram is irradiated with light, light is diffracted by the diffraction grating constituting the hologram, and light in which the light intensity and phase, which are information of the light recorded in the hologram, is reproduced.
- a reflection hologram (Lippmann hologram) can be used for the optical sheet 36.
- the light traveling in the same direction as the image light L emitted from the conversion optical system 10A is used as the reference light RL, and information on the object light OL is recorded.
- the object light OL recorded on the optical sheet 36 is light incident from the back surface 31r of the image projection unit 30B. That is, as the object light OL, light that travels in the first direction C3a along the plane orthogonal to the rotation axis RA and diffuses in the direction C4 (second direction) along the rotation axis RA is recorded. .
- the optical sheet 36 from the same direction as the reference light RL when light enters the optical sheet 36 from the same direction as the reference light RL, light having the same information as the object light OL is reproduced. That is, when light enters the optical sheet 36 from the same direction as the reference light RL, the light travels in the first direction C3 in the plane orthogonal to the rotation axis RA and diffuses in the direction C4 along the rotation axis RA. Light is reproduced. At this time, the angle A3 between the emission direction C5 of the image light L emitted from the conversion optical system 10A and the traveling direction C3a of the image light L changed in direction by the image projection unit 30B is set to 90 ° or less. ing.
- a method for manufacturing the optical sheet 36 that is a reflection hologram will be described.
- a photosensitive sheet 36 a on which a hologram is recorded is prepared and attached to the surface 31 p of the base 31.
- a lens sheet 37 having a lenticular lens is disposed on the back surface 31 r of the base 31.
- the object light OL is irradiated from the back surface 31 r side of the base portion 31 and the reference light RL is irradiated from the front surface 31 p side of the base portion 31.
- the object light OL is parallel light incident perpendicularly to the back surface 31r of the base 31.
- the reference light RL is parallel light that is incident on the surface 31p of the base 31 with a predetermined angle.
- the predetermined angle is, for example, 22 degrees from the surface of 31p.
- a diffraction grating corresponding to interference fringes caused by the object light OL and the reference light RL is recorded on the photosensitive sheet 36a.
- the optical sheet 36 which is a reflection hologram is manufactured by the above procedure. Further, when displaying a color stereoscopic image in the stereoscopic image projector 1B, the optical sheet 36 is manufactured by multiple exposure of the reference light RL and the object light OL with red, green, and blue laser beams, respectively.
- the manufacturing method of the optical sheet 36 is not limited to the said method.
- the optical sheet 36 may be manufactured using an apparatus described in a hologram creating apparatus invented by the present inventor (Japanese Patent Laid-Open No. 11-249536).
- the optical sheet 36 may be attached to the base 31 after being produced by exposure.
- the image projection apparatus 1B is different from the image projection apparatus 1A only in that the image projection unit 30B includes an optical sheet 36 that is a reflection hologram. Therefore, the stereoscopic image projection method described in detail in the first embodiment can be used as a stereoscopic image projection method using the stereoscopic image projection device 1B.
- the conversion optical system 10A changes the traveling direction of the image light L to a predetermined direction, so that the image light L is converted into an image projection unit along with the rotation of the conversion optical system 10A.
- 30B is projected while being scanned around the rotation axis RA.
- the image projection unit 30B has an optical sheet 36 that is a reflection hologram. Therefore, the projected image light L is converted into the same direction C3a as the traveling direction of the object light OL recorded on the optical sheet 36, and is diffused in the direction C4 along the rotation axis RA. Since this conversion optical system 10A is rotationally driven by the rotational drive unit 20, the projection position of the image light L in the image projection unit 30B moves in the rotational direction.
- the first direction C3a corresponds to the position on the image projection unit 30B and the incident angle of the image light L to the position. Therefore, when the image light L is projected while being scanned on the image projection unit 30B, the image light L is projected in different directions according to the position on the image projection unit 30B and the incident angle to the position. The Accordingly, an image corresponding to the viewpoint of the observer V can be projected, and thus the stereoscopic image 35 can be displayed. In addition, by using the conversion optical system 10A and the image projection unit 30B, a stereoscopic image 35 can be generated in a wide area away from the conversion optical system 10A.
- the image projection unit 30B has the optical sheet 36 that is a reflection hologram.
- the optical sheet 36 when light is incident from the same direction as the reference light RL, light having the same information as the object light OL is reproduced. That is, only the image light L emitted from the conversion optical system 10A is handled, and the image light L travels in the first direction C3a and is converted into light that diffuses in the direction C4 along the rotation axis RA. For this reason, even if light enters the image projection unit 30B from a direction other than the incident direction of the image light L, the light proceeds to the first direction C3a and is not converted to light that diffuses in the direction C4. Accordingly, it is possible to suppress a reduction in the visibility of the stereoscopic image 35 due to the reflection of disturbance light on the image projection unit 30B.
- the background contrast is improved and the visibility of the stereoscopic image 35 can be further increased.
- the image projector 30B does not include the diffusion plate 33. Accordingly, since the occurrence of chromatic dispersion caused by the diffraction of the diffusion plate 33 can be suppressed, the occurrence of uneven color in the stereoscopic image 35 can be suppressed.
- the image projection unit 30B does not include the diffusion plate 33, and only light from the incident direction of the image light L is converted into light that diffuses in the direction C4. Therefore, the image projection unit 30B can be made transparent.
- the observer V can observe the three-dimensional stereoscopic image displayed in the space in front of or behind the image projection unit 30B, and can also observe the object and the scenery on the opposite side of the image projection unit 30B. it can.
- the three-dimensional image projector of the third embodiment is that the image projection unit 30C includes an optical sheet 38 on which a diffraction grating is formed instead of the reflecting plate 32 and the diffusing plate 33. Different from 1A.
- the stereoscopic image projector of the third embodiment is different from the stereoscopic image projector 1B of the second embodiment in that an optical sheet 38 that is a transmission hologram is provided instead of the optical sheet 36 that is a reflection hologram.
- Other configurations of the stereoscopic image projector of the third embodiment are the same as those of the stereoscopic image projectors 1A and 1B of the first and second embodiments.
- the image projection unit 30C including the optical sheet 38 will be described in detail.
- the image projection unit 30 ⁇ / b> C includes a base 31 and an optical sheet 38.
- the base 31 PMMA, PC, or glass which is an optically transparent member can be used.
- the optical sheet 38 on which the diffraction grating is formed is affixed to the surface 31 p of the base 31.
- a transmission hologram is used for the optical sheet 38.
- the light traveling in the same direction as the image light L emitted from the conversion optical system 10A is used as the reference light RL, and information on the object light OL is recorded.
- the object light OL recorded on the optical sheet 38 is light incident from the surface 31p side of the base portion 31 and travels in the first direction C3b along the plane orthogonal to the rotation axis RA and travels to the rotation axis RA.
- Light diffusing in the direction C4 along is recorded (see FIG. 16). Therefore, when light enters the optical sheet 38 from the same direction as the reference light RL, light having the same information as the object light OL is reproduced. That is, when the image light L enters the optical sheet 38 from the same direction as the reference light RL, the image light L that travels in the first direction C3b and diffuses in the direction C4 is reproduced.
- the angle A4 between the emission direction C5 of the image light L emitted from the conversion optical system 10A and the traveling direction C3b of the image light L whose direction is changed by the image projection unit 30C is set to 90 ° or more. ing.
- a method for manufacturing the optical sheet 38 which is a transmission hologram will be described.
- a photosensitive sheet 38 a on which a transmission hologram is recorded is prepared and attached to the surface 31 p of the base 31.
- a lens sheet 37 having a lenticular lens is disposed on the surface 31p side of the base 31 so as to be separated from the photosensitive sheet 38a.
- the object light OL is irradiated from the surface 31p side of the base portion 31
- the reference light RL is irradiated from the surface 31p side of the base portion 31.
- the object light OL incident on the photosensitive sheet 38a is light emitted from the lens sheet 37, and is light that is orthogonal to the base 31 and diffuses in one direction.
- the reference light RL is parallel light that is incident on the surface 31p of the base 31 with a predetermined angle A2.
- the predetermined angle A2 is 68 degrees as an example.
- the optical sheet 38 which is a transmission hologram is manufactured by the above procedure. Further, when displaying a color stereoscopic image in the stereoscopic image projector, the optical sheet 38 is manufactured by multiple exposure of the reference light RL and the object light OL with red, green, and blue laser beams, respectively.
- the optical sheet 38 is manufactured by multiple exposure using only a monochromatic laser and adjusting the angles of the reference light RL and the object light OL so as to correct the Bragg matching angles of red, green, and blue. Also good.
- the optical sheet 38 may be attached to the base 31 after being produced by exposure.
- the stereoscopic image projection apparatus 1C is different from the image projection apparatus 1A only in that the stereoscopic image projection unit 30C includes an optical sheet 38 that is a transmission hologram. Therefore, the stereoscopic image projection method described in detail in the first embodiment can be used as the stereoscopic image projection method using the stereoscopic image projection apparatus of the third embodiment. More specifically, in the selection step S3 (see FIGS. 5 and 7), the observer V who observes the stereoscopic image 35 from the back surface 31r of the base 31 when generating the image light L that passes through the image projection unit 30C. An image corresponding to the direction of the line of sight is selected.
- the three-dimensional image 35 can be generated in a wide area away from the conversion optical system 10A, similarly to the three-dimensional image projector 1A of the first embodiment.
- the three-dimensional image projector of 3rd Embodiment it has the optical sheet 38 which is a transmission hologram. Therefore, the three-dimensional image projector of the third embodiment can suppress a decrease in the visibility of the three-dimensional image 35 due to the reflection of disturbance light. Furthermore, the stereoscopic image projector of the third embodiment can suppress the occurrence of uneven color in the stereoscopic image 35.
- the stereoscopic image projection apparatus of the third embodiment it is possible to display an actual object and the reproduced stereoscopic image 35 so as to overlap each other.
- a stereoscopic image projection system 100C including the stereoscopic image projector 1C of the fourth embodiment will be described.
- the stereoscopic image projector 1C of the fourth embodiment is different from the stereoscopic image projector 1A of the first embodiment in that the conversion optical system 10B further includes a third optical member 13.
- the other configuration of the stereoscopic image projector 1C of the fourth embodiment is the same as that of the stereoscopic image projector 1A of the first embodiment.
- the conversion optical system 10B including the third optical member 13 will be described in detail.
- the conversion optical system 10 ⁇ / b> B further includes a third optical member 13 in addition to the first optical member 11 and the second optical member 12.
- the second optical member 12, the first optical member 11, and the third optical member 13 are arranged in this order from the image light emitting unit 3 side.
- the third optical member 13 is fixed to the emission surface 11 r of the first optical member 11. Accordingly, the third optical member 13 rotates around the rotation axis RA in synchronization with the rotation of the first optical member 11.
- the third optical member 13 is a cylindrical lens that converges the image light L that is parallel light only in one direction.
- the third optical member 13 converges the image light L in the third direction C6.
- the third direction C6 is a direction included in the virtual plane P1 orthogonal to the rotation axis RA, and is a direction orthogonal to the emission direction C1 on the emission surface 11r of the first optical member 11.
- the image light L emitted from the third optical member 13 and reaching the image projection unit 30A is converged only in the third direction C6 on the image projection unit 30A. For this reason, the image light L that has reached the image projection unit 30A is not converged in the direction C4 along the rotation axis RA on the image projection unit 30A.
- the cylindrical lens of the third optical member 13 is preferably a flat cylindrical lens having a plurality of lenses formed on a parallel straight line by dividing a curved lens into parallel regions like a Fresnel lens.
- the image projection apparatus 1C is different from the image projection apparatus 1A only in that the conversion optical system 10B includes a third optical member 13 that is a cylindrical lens. That is, only the point where the image light L is converged only in the third direction C6 on the image projection unit 30A is different from the image projection apparatus 1A. Therefore, the stereoscopic image projection method described in detail in the first embodiment can be used as a stereoscopic image projection method using the stereoscopic image projector 1C. More specifically, in the selection step S3 (see FIGS.
- the stereoscopic image 35 is observed from the surface 31p side of the base 31 when generating the image light L whose direction is changed in the image projection unit 30A. An image corresponding to the direction of the line of sight of the observer V to be selected is selected.
- FIG. 19A is a diagram for explaining the operational effects of the conversion optical system 10 ⁇ / b> A of the first embodiment that does not include the third optical member 13.
- the image light L is emitted to the image projection unit 30A. Accordingly, the image light L is irradiated on a range E1 including the end points M1, M2 and the midpoint M3 on the image projection unit 30A.
- the image projection unit 30A When the image projection unit 30A has a curved shape so as to surround the rotation axis RA, the distance until the image light L emitted from the conversion optical system 10A reaches the end points M1 and M2, and until it reaches the middle point M3.
- a distance difference R1 is generated between the distance and the distance. That is, because the image projection unit 30A is curved, the light near the center of the image light L needs to travel longer than the light near the end of the image light L by the distance difference R1.
- the distance difference R1 When the distance difference R1 is large, the reproduced stereoscopic image 35 may be distorted.
- FIG. 19 (b) is a diagram for explaining the operational effects of the conversion optical system 10 ⁇ / b> B of the fourth embodiment including the third optical member 13.
- the image light L emitted from the conversion optical system 10B of the fourth embodiment is converged in the third direction C6. Accordingly, the image light L is irradiated on a range E2 including the end points M4 and M5 and the midpoint M6 on the image projection unit 30A.
- This range E2 is narrower than the range E1 of the first embodiment. For this reason, the distance difference R2 between the distance until the image light L emitted from the conversion optical system 10B reaches the end points M4 and M5 and the distance until it reaches the middle point M6 can be reduced. Therefore, distortion of the reproduced stereoscopic image 35 can be suppressed.
- the conversion optical system 10B including the third optical member 13 is applied to any of the stereoscopic image projector 1A of the first embodiment, the stereoscopic image projector 1B of the second embodiment, and the stereoscopic image projector of the third embodiment. Is possible.
- the configuration for suppressing the distortion of the stereoscopic image due to the curvature of the image projection unit 30A is not limited to the configuration including the third optical member 13.
- pre-distorted image light may be emitted from the conversion optical system 10A so that an image is projected without distortion when the image light L is projected onto the curved image projection unit 30A.
- a matrix indicating distortion is calculated, and image data is multiplied by an inverse matrix of the matrix.
- the above-described embodiment shows an example of the stereoscopic image projection apparatuses 1A to 1C, the stereoscopic image projection method, and the stereoscopic image projection systems 100A to 100C.
- the stereoscopic image projection apparatuses 1A to 1C, the stereoscopic image projection method, and the stereoscopic image projection systems 100A to 100C are not limited to the above-described embodiments.
- the stereoscopic image projection apparatuses 1A to 1C, the stereoscopic image projection method, and the stereoscopic image projection systems 100A to 100C may be modified or applied to others without departing from the scope of the claims.
- the Fresnel lens is used for the second optical member 12, it is not limited to this.
- the second optical member 12 an optical member different from a Fresnel lens that can convert the image light L into parallel light may be used.
- a hologram having the function of the second optical member 12 may be manufactured and used.
- the first optical member 11 is a linear prism plate, but is not limited to this.
- an optical member different from a linear prism plate that can convert the traveling direction of the image light L into a predetermined direction may be used.
- a hologram having the function of the first optical member 11 may be manufactured and used.
- a lenticular lens is used for the diffusion plate 33, it is not limited to this.
- an optical member different from the lenticular lens capable of diffusing the projected image light L in a predetermined direction may be used.
- a prism plate having a fine prism pitch may be used.
- Image projection unit 30A may be image projection unit 30D having the configuration shown in FIG.
- a lenticular lens 33 including a plurality of cylindrical lenses 33 a is pasted on the back surface 31 r of the base 31.
- the non-lens surface 33r of the lenticular lens 33 is pasted so as to face the back surface 31r of the base 31.
- a reflecting plate 32 b is provided on the lens surface 33 p of the lenticular lens 33.
- Such a reflector 32b can be formed by vapor deposition of aluminum.
- the base 31 and the lenticular lens 33 may be integrally formed.
- the image light L may be irradiated from the lenticular lens 33 side.
- the stereoscopic image projection apparatuses 1A to 1C project the image light L emitted from the image light emission unit 3 including the projector 3b onto the image projection units 30A to 30D.
- the image light projected on the image projection units 30A to 30D is not limited to this.
- the image light may be generated, for example, by causing a laser beam, which is light having directivity, to enter a medium on which a hologram is recorded.
- the image light emitting unit 3 including the projector 3b and the image creating unit 2 are arranged on the vertically lower side of the image projecting unit (screen) 30. Further, the conversion optical systems 10A and 10B and the rotation driving unit 20 are arranged vertically below the image projecting units 30A to 30D.
- the stereoscopic image projection apparatus is not limited to this arrangement.
- the image creating unit 2, the image light emitting unit 3, the conversion optical systems 10A and 10B, and the rotation driving unit 20 may be arranged vertically above the image projecting units 30A to 30D.
- the image creating unit 2, the image light emitting unit 3, the conversion optical systems 10A and 10B, and the rotation driving unit 20 are arranged on the ceiling, and the image light L from the projector 3b is transmitted through the conversion optical systems 10A and 10B to the image projection unit 30A. May be projected to ⁇ 30D.
- first optical member 11, the second optical member 12, and the third optical member 13 may produce and use holograms having these functions, or multiple exposures may be performed by combining the functions combined with each other. It may be produced and used.
- the first optical member 11, the second optical member 12, and the third optical member 13 may be produced as reflection holograms to control the traveling direction of light.
- the image light emitting unit 3 is arranged vertically above the image projecting units 30A to 30D, and the conversion optical systems 10A and 10B and the rotation driving unit 20 are arranged vertically below the image projecting units 30A to 30D.
- the image light emitting unit 3 may be arranged vertically below the image projecting units 30A to 30D, and the conversion optical systems 10A and 10B and the rotation driving unit 20 may be arranged vertically above the image projecting units 30A to 30D.
- the stereoscopic image projection apparatuses 1A to 1C are provided with the conversion optical systems 10A and 10B so that the optical axis AL of the stereoscopic image projection apparatuses 1A to 1C is along the vertical direction.
- the conversion optical systems 10A and 10B of the stereoscopic image projectors 1A to 1C may be arranged in a direction in which the optical axis AL of the conversion optical systems 10A and 10B intersects the vertical direction.
- the conversion optical systems 10A and 10B may be arranged so that the optical axis AL is along the horizontal direction.
- the image projection units 30A to 30D are arranged so as to be curved in a direction perpendicular to the rotation axis RA along the horizontal direction.
- the stereoscopic image projectors 1A to 1C may be used for projecting a stereoscopic image on a dashboard of an automobile.
- image light is emitted from the image generation unit and the image projection unit embedded in the dashboard, and a stereoscopic image is projected by the image projection unit installed on the dashboard.
- the windshield may be used as the base of the image projection unit.
- a reflection plate and a diffusion plate are formed on the windshield.
- An optical sheet having a diffraction grating is attached to the windshield.
- the stereoscopic image projectors 1A to 1C may be used to project a stereoscopic image on a stage or screen such as an exhibition hall, a movie theater, or a theater. Moreover, you may comprise the product which adds this and adds a stereoscopic video display as an added value.
- a stereoscopic image projection device a stereoscopic image projection method, and stereoscopic image projection systems 100A to 100C in which a region where a stereoscopic image can be visually recognized is expanded.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Projection Apparatus (AREA)
- Stereoscopic And Panoramic Photography (AREA)
Abstract
Description
図1及び図2は、第1実施形態の立体画像投影装置1Aを含む立体画像投影システム100Aの構成を説明するための図である。図1は立体画像投影システム100Aの構成を説明するためのブロック図である。図2は、立体画像投影システム100Aの構成を説明するための図である。図1及び図2に示されるように、立体画像投影システム100Aは、立体画像投影装置1A、画像作成部2、及び画像光出射部3を備えている。
次に、第2実施形態の立体画像投影装置1Bを含む立体画像投影システム100Bを説明する。図11に示すように、第2実施形態の立体画像投影装置1Bは、反射板32及び拡散板33に代えて、回折格子が形成された光学シート36を画像投影部30Bが含む点で、第1実施形態の立体画像投影装置1Aと相違する。第2実施形態の立体画像投影装置1Bのその他の構成は、第1実施形態の立体画像投影装置1Aと同様である。以下、画像投影部30Bについて詳細に説明する。
次に、第3実施形態の立体画像投影装置を説明する。第3実施形態の立体画像投影装置は、反射板32及び拡散板33に代えて、回折格子が形成された光学シート38を画像投影部30Cが備える点で、第1実施形態の立体画像投影装置1Aと相違する。また、第3実施形態の立体画像投影装置は、反射型ホログラムである光学シート36に代えて、透過型ホログラムである光学シート38を備える点で、第2実施形態の立体画像投影装置1Bと相違する。第3実施形態の立体画像投影装置のその他の構成は、第1及び第2実施形態の立体画像投影装置1A,1Bと同様である。以下、光学シート38を備える画像投影部30Cについて詳細に説明する。
次に、第4実施形態の立体画像投影装置1Cを含む立体画像投影システム100Cを説明する。第4実施形態の立体画像投影装置1Cは、転換光学系10Bが第3光学部材13をさらに含む点で、第1実施形態の立体画像投影装置1Aと相違する。第4実施形態の立体画像投影装置1Cのその他の構成は、第1実施形態の立体画像投影装置1Aと同様である。以下、第3光学部材13を含む転換光学系10Bについて詳細に説明する。
Claims (15)
- 画像光が入射される入射面及び前記入射面の反対側にある出射面を有し、前記出射面における前記画像光の出射方向と前記出射面とが所定の角度をなすように前記画像光の進行方向を転換する板状の第1光学部材を含む転換光学系と、
前記出射面上の所定点を回転中心として、前記転換光学系を前記出射面に沿って回転駆動する回転駆動部と、
前記回転中心を含む回転軸に沿って立設され、前記転換光学系から出射された前記画像光の進行方向を前記回転軸に対して交わる面に沿った第1方向に転換すると共に、前記転換光学系から出射された前記画像光を前記回転軸に沿った第2方向に拡散する画像投影部と、を備える立体画像投影装置。 - 前記画像投影部は、回折格子を含む請求項1に記載の立体画像投影装置。
- 前記画像投影部は、前記回折格子を含む反射型ホログラムである請求項2に記載の立体画像投影装置。
- 前記画像投影部は、前記回折格子を含む透過型ホログラムである請求項2に記載の立体画像投影装置。
- 前記画像投影部は、前記画像光を前記第1方向に反射する反射板と、前記画像光を前記第2方向に拡散する拡散板と、を有し、
前記反射板と前記拡散板とは積層されている請求項1に記載の立体画像投影装置。 - 前記拡散板は複数のシリンドリカルレンズを含むレンチキュラーレンズである請求項5に記載の立体画像投影装置。
- 前記拡散板のレンズ面には、前記反射板が設けられている請求項6に記載の立体画像投影装置。
- 前記転換光学系は、第2光学部材をさらに含み、
前記第2光学部材は、前記画像光を平行光に変換すると共に前記第1光学部材の前記入射面に対して前記平行光に変換された前記画像光を出射する請求項1~7の何れか一項に記載の立体画像投影装置。 - 前記転換光学系は、第3光学部材をさらに含み、
前記第3光学部材は、前記画像投影部に対して第3方向に収束させた前記画像光を出射し、
前記第3方向は、前記回転軸に対して直交する面に沿った方向であり且つ前記第1光学部材の前記出射面における前記出射方向に直交する方向である請求項1~8の何れか一項に記載の立体画像投影装置。 - 前記画像投影部は前記回転軸に垂直な方向に湾曲した形状である請求項1~9の何れか一項に記載の立体画像投影装置。
- 前記転換光学系は、回折格子を含む請求項1に記載の立体画像投影装置。
- 回転駆動部により回転駆動される転換光学系から画像投影部に画像光を投影して立体画像を得る方法であって、
物体に対する視点を互いに異なる位置に変化させて得た複数の原画像のそれぞれを、前記原画像の一方向に沿って分割して分割画像を形成する分割工程と、
複数の前記分割画像から、前記転換光学系の回転角度、及び前記画像投影部に投影された前記画像光の前記画像投影部における位置に基づいて前記分割画像を選択する選択工程と、
選択された前記分割画像を組み合わせて前記画像光を発生するための投影画像を作成する結合工程と、
前記投影画像が反映された前記画像光を生成し、前記転換光学系を通じて前記画像投影部に投影する投影工程と、を備え、
前記投影工程では、
前記画像光をパルス状に連続的に出射する画像光出射部から前記画像光を前記転換光学系に出射し、
前記画像光が入射される入射面及び前記入射面の反対側にある出射面を有する板状の光学部材を含み、前記出射面における前記画像光の出射方向と前記出射面とが所定の角度をなすように前記画像光の進行方向を転換する転換光学系により前記画像光の進行方向を転換し、
前記出射面上の所定点を回転中心として、前記転換光学系を前記出射面に沿って回転駆動し、
前記回転中心を含む回転軸に沿って立設され、前記転換光学系から出射された前記画像光の進行方向を前記回転軸に対して交わる面に沿った第1方向に転換すると共に、前記転換光学系から出射された前記画像光を前記回転軸に沿った第2方向に拡散する画像投影部に前記画像光を出射する立体画像投影方法。 - 前記画像投影部は、前記転換光学系から出射された前記画像光を反射する反射板及び前記画像光を一方向に拡散する拡散板が積層されている請求項12に記載の立体画像投影方法。
- 物体に対する視点を互いに異なる位置に変化させて得られた複数の原画像を用いて投影画像を作成する画像作成部と、
前記投影画像が反映された画像光をパルス状に連続的に出射する画像光出射部と、
前記画像光が入射される入射面及び前記入射面の反対側にある出射面を有する板状の光学部材を含み、前記出射面における前記画像光の出射方向と前記出射面とが所定の角度をなすように前記画像光の進行方向を転換する転換光学系と、
前記出射面上の所定点を回転中心として、前記転換光学系を前記出射面に沿って回転駆動する回転駆動部と、
前記回転中心を含む回転軸に沿って立設され、前記転換光学系から出射された前記画像光の進行方向を前記回転軸に対して交わる面に沿った第1方向に転換すると共に、前記転換光学系から出射された前記画像光を前記回転軸に沿った第2方向に拡散する画像投影部と、
を備え、
前記投影画像は前記原画像の一方向に沿って前記原画像が分割された複数の分割画像により構成され、
前記分割画像は、前記転換光学系の回転角度、及び前記画像投影部に投影された前記画像光の前記画像投影部における位置に基づいて選択される立体画像投影システム。 - 前記画像投影部は、前記転換光学系から出射された前記画像光を反射する反射板及び前記画像光を一方向に拡散する拡散板が積層されている請求項14に記載の立体画像投影システム。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013538480A JP6212683B2 (ja) | 2011-10-14 | 2012-09-13 | 立体画像投影装置、立体画像投影方法、及び立体画像投影システム |
US14/351,856 US9516299B2 (en) | 2011-10-14 | 2012-09-13 | Three-dimensional image projector, three-dimensional image projection method, and three-dimensional image projection system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-227030 | 2011-10-14 | ||
JP2011227030 | 2011-10-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013054634A1 true WO2013054634A1 (ja) | 2013-04-18 |
Family
ID=48081692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/073476 WO2013054634A1 (ja) | 2011-10-14 | 2012-09-13 | 立体画像投影装置、立体画像投影方法、及び立体画像投影システム |
Country Status (4)
Country | Link |
---|---|
US (1) | US9516299B2 (ja) |
JP (1) | JP6212683B2 (ja) |
TW (1) | TW201326906A (ja) |
WO (1) | WO2013054634A1 (ja) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016002144A1 (ja) * | 2014-07-01 | 2016-01-07 | 国立研究開発法人情報通信研究機構 | 立体ディスプレイ |
JP2016014743A (ja) * | 2014-07-01 | 2016-01-28 | 国立研究開発法人情報通信研究機構 | 立体ディスプレイ |
WO2020090422A1 (ja) * | 2018-10-31 | 2020-05-07 | ソニー株式会社 | 映像表示装置 |
US10758974B2 (en) | 2014-02-21 | 2020-09-01 | Terves, Llc | Self-actuating device for centralizing an object |
US10865465B2 (en) | 2017-07-27 | 2020-12-15 | Terves, Llc | Degradable metal matrix composite |
US11167343B2 (en) | 2014-02-21 | 2021-11-09 | Terves, Llc | Galvanically-active in situ formed particles for controlled rate dissolving tools |
JP2022501619A (ja) * | 2018-09-17 | 2022-01-06 | ハイパーステルス・バイオテクノロジー・コーポレーション | レーザ散乱、偏位および操作のためのシステムおよび方法 |
US11685983B2 (en) | 2014-02-21 | 2023-06-27 | Terves, Llc | High conductivity magnesium alloy |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI625551B (zh) | 2013-03-15 | 2018-06-01 | 傲思丹度科技公司 | 具有改良之視角深度及解析度之三維光場顯示器及方法 |
JP6456189B2 (ja) * | 2015-02-27 | 2019-01-23 | 国立研究開発法人情報通信研究機構 | 立体画像表示装置 |
KR20190100428A (ko) | 2016-07-19 | 2019-08-28 | 게이트박스 가부시키가이샤 | 화상 표시장치, 화제 선택 방법, 화제 선택 프로그램, 화상 표시 방법 및 화상 표시 프로그램 |
TWI642973B (zh) * | 2017-09-12 | 2018-12-01 | 晶將數位多媒體科技股份有限公司 | 3D floating stereoscopic image creation and display device |
WO2020045167A1 (ja) * | 2018-08-31 | 2020-03-05 | 富士フイルム株式会社 | 投写型表示装置 |
DE102019212306A1 (de) * | 2019-08-16 | 2021-02-18 | Robert Bosch Gmbh | Anzeigevorrichtung für ein 3D-Display für ein Fahrzeug, 3D-Display mit einer Anzeigevorrichtung und Verfahren zum Herstellen einer Anzeigevorrichtung |
JP2021071754A (ja) * | 2019-10-29 | 2021-05-06 | ソニー株式会社 | 画像表示装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0566478A (ja) * | 1991-09-10 | 1993-03-19 | Dainippon Printing Co Ltd | 反射型スクリーン及びその製造方法 |
JP2006047690A (ja) * | 2004-08-04 | 2006-02-16 | Ts Photon:Kk | 投射型ip方式による三次元ディスプレイシステム |
JP2006133455A (ja) * | 2004-11-05 | 2006-05-25 | Matsushita Electric Ind Co Ltd | 三次元画像表示装置 |
JP2007304248A (ja) * | 2006-05-10 | 2007-11-22 | Nippon Telegr & Teleph Corp <Ntt> | 3次元表示装置 |
WO2009113618A1 (ja) * | 2008-03-13 | 2009-09-17 | 有限会社ホーリーマイン | 立体画像投影装置 |
JP2012128898A (ja) * | 2010-12-14 | 2012-07-05 | Hitachi Media Electoronics Co Ltd | 光ピックアップ及び光ディスク装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0400373D0 (en) * | 2004-01-09 | 2004-02-11 | Koninkl Philips Electronics Nv | A three-dimensional display |
WO2006134793A1 (ja) * | 2005-06-14 | 2006-12-21 | Brother Kogyo Kabushiki Kaisha | 投影装置 |
-
2012
- 2012-09-13 TW TW101133559A patent/TW201326906A/zh unknown
- 2012-09-13 US US14/351,856 patent/US9516299B2/en active Active
- 2012-09-13 WO PCT/JP2012/073476 patent/WO2013054634A1/ja active Application Filing
- 2012-09-13 JP JP2013538480A patent/JP6212683B2/ja not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0566478A (ja) * | 1991-09-10 | 1993-03-19 | Dainippon Printing Co Ltd | 反射型スクリーン及びその製造方法 |
JP2006047690A (ja) * | 2004-08-04 | 2006-02-16 | Ts Photon:Kk | 投射型ip方式による三次元ディスプレイシステム |
JP2006133455A (ja) * | 2004-11-05 | 2006-05-25 | Matsushita Electric Ind Co Ltd | 三次元画像表示装置 |
JP2007304248A (ja) * | 2006-05-10 | 2007-11-22 | Nippon Telegr & Teleph Corp <Ntt> | 3次元表示装置 |
WO2009113618A1 (ja) * | 2008-03-13 | 2009-09-17 | 有限会社ホーリーマイン | 立体画像投影装置 |
JP2012128898A (ja) * | 2010-12-14 | 2012-07-05 | Hitachi Media Electoronics Co Ltd | 光ピックアップ及び光ディスク装置 |
Non-Patent Citations (1)
Title |
---|
Y. AOKI ET AL.: "Directional light scanning 3-D display", CONFERENCE PAPER, ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE AND EXHIBITION (ACP), 2 November 2009 (2009-11-02), pages WL113 * |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11167343B2 (en) | 2014-02-21 | 2021-11-09 | Terves, Llc | Galvanically-active in situ formed particles for controlled rate dissolving tools |
US10758974B2 (en) | 2014-02-21 | 2020-09-01 | Terves, Llc | Self-actuating device for centralizing an object |
US10870146B2 (en) | 2014-02-21 | 2020-12-22 | Terves, Llc | Self-actuating device for centralizing an object |
US11097338B2 (en) | 2014-02-21 | 2021-08-24 | Terves, Llc | Self-actuating device for centralizing an object |
US11685983B2 (en) | 2014-02-21 | 2023-06-27 | Terves, Llc | High conductivity magnesium alloy |
JP2016014743A (ja) * | 2014-07-01 | 2016-01-28 | 国立研究開発法人情報通信研究機構 | 立体ディスプレイ |
JP2016014742A (ja) * | 2014-07-01 | 2016-01-28 | 国立研究開発法人情報通信研究機構 | 立体ディスプレイ |
WO2016002144A1 (ja) * | 2014-07-01 | 2016-01-07 | 国立研究開発法人情報通信研究機構 | 立体ディスプレイ |
US10865465B2 (en) | 2017-07-27 | 2020-12-15 | Terves, Llc | Degradable metal matrix composite |
JP2022501619A (ja) * | 2018-09-17 | 2022-01-06 | ハイパーステルス・バイオテクノロジー・コーポレーション | レーザ散乱、偏位および操作のためのシステムおよび方法 |
WO2020090422A1 (ja) * | 2018-10-31 | 2020-05-07 | ソニー株式会社 | 映像表示装置 |
JPWO2020090422A1 (ja) * | 2018-10-31 | 2021-09-30 | ソニーグループ株式会社 | 映像表示装置 |
JP7439764B2 (ja) | 2018-10-31 | 2024-02-28 | ソニーグループ株式会社 | 映像表示装置 |
Also Published As
Publication number | Publication date |
---|---|
TW201326906A (zh) | 2013-07-01 |
US20140307064A1 (en) | 2014-10-16 |
JPWO2013054634A1 (ja) | 2015-03-30 |
JP6212683B2 (ja) | 2017-10-18 |
US9516299B2 (en) | 2016-12-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6212683B2 (ja) | 立体画像投影装置、立体画像投影方法、及び立体画像投影システム | |
CN102428402B (zh) | 使用散斑抑制元件上的小透镜排列的光学投影系统 | |
US11422441B2 (en) | Image display apparatus with reflection regions | |
US9454013B2 (en) | Autostereoscopic display device and projecting method using the same | |
US20200387060A1 (en) | Projector with laser and phosphor | |
US11429064B2 (en) | Holographic display apparatus for providing expanded viewing window | |
CN110462489B (zh) | 图像显示装置和图像显示元件 | |
CN1157625C (zh) | 立体显示装置 | |
US20160134861A1 (en) | Autostereoscopic projection device | |
JP2008107583A (ja) | 3次元画像表示装置及びその表示方法 | |
JP2007101929A (ja) | 投影型三次元表示装置 | |
JP3254365B2 (ja) | マルチ画像表示装置 | |
JP5032796B2 (ja) | 立体画像表示装置 | |
JP6456189B2 (ja) | 立体画像表示装置 | |
Uchida et al. | 360-degree three-dimensional table-screen display using small array of high-speed projectors | |
KR102540148B1 (ko) | 컴퓨터 합성 홀로그래픽 커스틱 이미지 생성 홀로그램 광학소자와 그의 제조 방법 및 장치 | |
JPH0618810A (ja) | 表示装置 | |
WO2022065185A1 (ja) | Ar用光学素子及びその製造方法、並びに、ar表示装置 | |
CN218122454U (zh) | 投影光机 | |
JP7081285B2 (ja) | 虚像表示装置、スクリーン部材及びスクリーン部材の製造方法 | |
US20230418089A1 (en) | Display apparatus | |
JPH0944066A (ja) | ホログラム表示システム | |
CN107515473A (zh) | 光学系统 | |
KR20120058165A (ko) | 프로젝터 | |
JP2007033932A (ja) | 投射装置及びこれを用いた画像表示装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12839837 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2013538480 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14351856 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12839837 Country of ref document: EP Kind code of ref document: A1 |