CN213517756U - Real-time dynamic three-dimensional display augmented reality near-to-eye display device - Google Patents
Real-time dynamic three-dimensional display augmented reality near-to-eye display device Download PDFInfo
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- CN213517756U CN213517756U CN202022921129.XU CN202022921129U CN213517756U CN 213517756 U CN213517756 U CN 213517756U CN 202022921129 U CN202022921129 U CN 202022921129U CN 213517756 U CN213517756 U CN 213517756U
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Abstract
The utility model discloses a near-to-eye display device of augmented reality of real-time dynamic three-dimensional display, include: the LCOS module comprises a self-luminous LCOS module, a filtering module, a linear polaroid, an incoupling triangular prism, a waveguide sheet and an outcoupling module; self-emissive LCOS modules include LCOS displays equipped with white LEDs; the filtering module is parallel and opposite to the self-luminous LCOS module and is used for filtering out unmodulated zero-order light and diffraction image conjugate light and converging object diffraction image light carrying three-dimensional scene wave front information distribution and then enabling the object diffraction image light to enter a triangular prism in a coupling mode; the waveguide sheet and the emergent surface of the coupling triangular prism form a first preset included angle; a coupling-out module is disposed on the waveguide sheet. The utility model discloses combine the advantage that the holographic light wave field of calculation can be controlled wantonly simultaneously, realized compact structure and can be to the near-to-eye display device of the real-time dynamic display of arbitrary three-dimensional object model.
Description
Technical Field
The utility model relates to a near-to-eye technical field especially relates to a near-to-eye display device of augmented reality of real-time dynamic three-dimensional display.
Background
Augmented reality near-to-eye display device utilizes computer simulation technique and virtual reality to fuse in projecting virtual information real scene to can let the user carry out relevant operation in semi-virtual environment, can help the mankind more conveniently receive information, better cognitive environment around and promote work efficiency more greatly, consequently by wide application in each field.
However, the outdoor head-mounted display in the existing near-to-eye display device has the problem of insufficient brightness efficiency, and does not have a module design of thinning and light weight, the volume and weight of the components are not light enough, the system size and structure are not compact enough, and the wearing by a human body is not convenient enough. In addition, there is no effective optical scheme that can be used to precisely control the wavefront information of light to achieve the purposes of eliminating convergence accommodation conflict and simulating the natural visual impression of human beings, thereby realizing a three-dimensional dynamic augmented reality near-to-eye display device that is comfortable to wear.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a near-to-eye display device of real-time dynamic three-dimensional display's augmented reality utilizes the characteristics that self-luminous LCOS module can provide the output light of high brightness and low-power consumption, designs the little display optical system of small and exquisite, high-efficient to solve outdoor wear-type display luminance efficiency not enough and light problem inadequately. And the advantage that the calculation holographic optical wave field can be controlled at will is combined, so that the near-to-eye display device which has a compact structure and can dynamically display any three-dimensional object model in real time is realized.
In order to achieve the above object, an embodiment of the present invention provides an augmented reality near-to-eye display device for real-time dynamic three-dimensional display, including: the LCOS module comprises a self-luminous LCOS module, a filtering module, a linear polaroid, an incoupling triangular prism, a waveguide sheet and an outcoupling module;
the self-luminous LCOS module comprises an LCOS display provided with a white light LED, and light emitted by the LCOS display carries object diffraction image light, non-modulated zero-order light and diffraction image conjugate light distributed by three-dimensional scene wave front information;
the filtering module is parallel and opposite to the self-luminous LCOS module and is used for filtering the unmodulated zero-order light and the diffraction image conjugate light and converging the object diffraction image light carrying three-dimensional scene wave front information distribution and then enabling the object diffraction image light to enter the coupling-in triangular prism;
the incident surface of the incoupling triangular prism is a first long edge of the incoupling triangular prism, and the first long edge is parallel to the emergent surface of the filter module and is attached with the linear polarizer; the exit surface of the incoupling triangular prism is a second long edge of the incoupling triangular prism, the second long edge is attached to the incident end surface of the waveguide sheet, the upper end surface and the lower end surface of the waveguide sheet are parallel, and a first preset included angle is formed between the exit surface of the incoupling triangular prism and the upper end surface of the waveguide sheet; the coupling-out module is arranged on the waveguide plate and used for coupling out the polarized light transmitted by the waveguide plate.
In one embodiment, the augmented reality near-eye display device further comprises a controller, the LED comprises R, G and a three-color B light source, and the controller is used for controlling the LED to illuminate R, G and the three-color B light source in a time-sharing manner so as to realize color illumination.
In a certain embodiment, the filtering module includes a first lens, a second lens and a diaphragm which are sequentially arranged along a light path of emergent light of the LCOS display, wherein the diaphragm is arranged at a back focal plane of the first lens and arranged between a first focal length and a second focal length of the second lens.
In one embodiment, the coupling-out module comprises a transmissive volume holographic grating or a reflective volume holographic grating.
In one embodiment, the transmissive volume holographic grating or the reflective volume holographic grating is a monolithic color volume holographic grating simultaneously sensing red, green and blue light; or the transmission type volume holographic grating or the reflection type volume holographic grating is a three-piece type color volume holographic grating formed by accurately aligning and stacking three monochromatic volume holographic gratings which sense red, green and blue; or the transmission type volume holographic grating or the reflection type volume holographic grating is a two-piece type color volume holographic grating formed by accurately aligning and stacking volume holographic gratings recorded by any two kinds of monochromatic light of red sensing, green sensing and blue sensing in the same area in a multiplexing mode and volume holographic gratings recorded by any one kind of monochromatic light of red sensing, green sensing and blue sensing.
In one embodiment, the coupling-out module includes a splitting film array with a predetermined splitting ratio, and the splitting film arrays are parallel to each other and are placed in the waveguide at equal intervals.
In one embodiment, the coupling-out module includes at least three of the light splitting film arrays.
In one embodiment, the light splitting film array and the lower end surface of the waveguide sheet form a second preset included angle.
The utility model discloses among the real-time three-dimensional augmented reality near-to-eye display device who shows of developments, utilize self-luminous LCOS module can provide the output light of high brightness and the characteristics of low-power consumption, the design is small and exquisite, high-efficient little display optical system, solve the problem that outdoor wear-type display luminance efficiency is not enough, slim and lightweight modular design moreover reduces the volume and the weight of component by a wide margin, reduce the system size and make the structure more compact simultaneously, be fit for the human body and wear. Meanwhile, the near-to-eye display device which is compact in structure and can dynamically display any three-dimensional object model in real time is realized by combining the advantage that the calculation of the holographic light wave field can be controlled at will.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an augmented reality near-to-eye display device for real-time dynamic three-dimensional display according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a filtering module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an augmented reality near-to-eye display device for real-time dynamic three-dimensional display according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides an augmented reality near-to-eye display device for real-time dynamic three-dimensional display, including: the self-luminous LCOS module 110, the filter module 120, the linear polarizer 130, the incoupling triangular prism 140, the waveguide sheet 150, and the outcoupling module 160;
the self-luminous LCOS module 110 includes an LCOS display equipped with a white light LED, and light emitted from the LCOS display carries object diffraction image light, non-modulated zero-order light, and diffraction image conjugate light of three-dimensional scene wavefront information distribution;
the filtering module 120 is parallel to and opposite to the self-luminous LCOS module 110, and configured to filter the non-modulated zero-order light and the diffraction image conjugate light, and converge the object diffraction image light carrying three-dimensional scene wavefront information distribution, and then inject the light into the coupling triangular prism 140;
the incident surface of the incoupling triangular prism 140 is a first long edge of the incoupling triangular prism 140, and the first long edge is parallel to the exit surface of the filter module 120 and is attached to the linear polarizer 130; the exit surface of the incoupling triangular prism 140 is a second long edge of the incoupling triangular prism 140, the second long edge is attached to the incident end surface of the waveguide sheet 150, the upper end surface and the lower end surface of the waveguide sheet 150 are parallel, and a first preset included angle is formed between the exit surface of the incoupling triangular prism 140 and the upper end surface; the outcoupling module 160 is disposed on the waveguide sheet 150, for outcoupling the polarized light transmitted through the waveguide sheet 150.
In this embodiment, the self-luminous LCOS module 110 is a 0.22 inch high efficiency self-luminous LCOS display module, equipped with a white LED backlight. When a three-dimensional calculation hologram obtained after wave-front coding of a three-dimensional scene is loaded on an LCOS, light emitted by the LCOS is object diffraction image light which is modulated by the three-dimensional calculation hologram and carries three-dimensional scene wave-front information distribution, unmodulated zero-order light and diffraction image conjugate light. The filtering module 120 is configured to filter out non-modulated zero-order light and diffraction image conjugate light, and converge object diffraction image light carrying three-dimensional scene wavefront information distribution, and then inject the converged object diffraction image light into the coupling triangular prism 140 through the polarizing plate. The object diffraction image light which is filtered by the filtering module 120 and carries the three-dimensional scene wavefront information distribution forms P light which is perpendicular to the incident plane through the linear polarizer 130, and then the P light enters the coupling triangular prism 140 and further enters the waveguide sheet 150. When the total reflection condition is satisfied, the coupled-in light can propagate forward to the coupling-out module 160 (which can be a light splitting film array or a coupling-out volume holographic grating) in the optical waveguide by means of total reflection, and then enter the human eye for imaging. The human eye can observe the holographically reconstructed three-dimensional virtual image, and the ambient light enters the human eye to be imaged through the coupling-out module 160 and the waveguide sheet 150 without being affected.
In one embodiment, the augmented reality near-eye display device further comprises a controller, the LED comprises R, G and a three-color B light source, and the controller is used for controlling the LED to illuminate R, G and the three-color B light source in a time-sharing manner so as to realize color illumination.
In this embodiment, the LED light source includes R, G, B three-color light source, which is controlled by a computer to realize color illumination by quickly lighting R, G, B light source in a time-sharing manner. When a three-dimensional computation hologram obtained by wavefront coding of a three-dimensional scene is loaded on the self-luminous LCOS module 110, light emitted from the self-luminous LCOS module 110 is object diffraction image light, unmodulated zero-order light, and diffraction image conjugate light which are modulated by the three-dimensional computation hologram and carry three-dimensional scene wavefront information distribution.
In one embodiment, the filtering module 120 includes a first lens 121, a second lens 123 and a diaphragm 122 sequentially disposed along an optical path of light emitted from the LCOS display, and the diaphragm 122 is disposed at a back focal plane of the first lens 121 and between a first focal length and a second focal length of the second lens 123.
Referring to fig. 2, in the present embodiment, the light emitted from the LCOS module 110 is imaged on a first plane (plane1) through the first Lens 121(Lens1), a stop 122 is disposed at the back focal plane of the first Lens 121(Lens1), the stop 122 is offset from the imaging center, only the positive first-order diffracted light wave passes through, the unmodulated zero-order light and the diffraction image conjugate light are filtered, and the light is converged by the second Lens 123(Lens2), and then enters the triangular prism 140 through the linear polarizer 130. The second lens 123 is introduced to adjust the imaging position and size of the reproduced image. According to the geometric imaging formula of the lens:
wherein f is2Is the focal length, z, of the second lens 1231Is an object distance, z2Is the image distance. Thus at a distance of the second lens 123z2At this point, the plane 3(plane3) can observe a clear reproduced image. By changing the position of the second lens 123, a clear reproduced image of different magnification can be obtained at different imaging positions. To obtain an enlarged real image, f is set1<z1<2f2Then the magnification is z relative to the reproduced image at the first plane (plane1)2/z1The size of the holographic reproduction image can be conveniently adjusted.
Referring to FIG. 1, in one embodiment, the coupling-out module 160 includes a transmissive volume holographic grating or a reflective volume holographic grating.
In one embodiment, the transmissive volume holographic grating or the reflective volume holographic grating is a monolithic color volume holographic grating simultaneously sensing red, green and blue light; or the transmission type volume holographic grating or the reflection type volume holographic grating is a three-piece type color volume holographic grating formed by accurately aligning and stacking three monochromatic volume holographic gratings which sense red, green and blue; or the transmission type volume holographic grating or the reflection type volume holographic grating is a two-piece type color volume holographic grating formed by accurately aligning and stacking volume holographic gratings recorded by any two kinds of monochromatic light of red sensing, green sensing and blue sensing in the same area in a multiplexing mode and volume holographic gratings recorded by any one kind of monochromatic light of red sensing, green sensing and blue sensing.
In the present embodiment, the coupling-out module 160 is the transmissive volume holographic grating or the reflective volume holographic grating. The transmission type volume holographic grating or the reflection type volume holographic grating can be a single-chip type color volume holographic grating which can sense red, green and blue light simultaneously, or a three-chip type color volume holographic grating which is formed by accurately aligning and stacking three single-color volume holographic gratings which sense red, green and blue, or a two-chip type color volume holographic grating which is formed by accurately aligning and stacking any two kinds of light in red, green and blue, and a volume holographic grating which records any one kind of monochromatic light in red, green and blue.
Referring to fig. 3, in one embodiment, the coupling-out module 160 includes a light splitting film array with a predetermined light splitting ratio, the light splitting film array is parallel to each other and is disposed in the waveguide sheet 150 at equal intervals.
In the present embodiment, the coupling-out module 160 includes a light splitting film array with a predetermined light splitting ratio, the light splitting film array is parallel to each other and is disposed in the waveguide sheet 150 at equal intervals. The light splitting film is a film which divides a light beam into two parts according to certain requirements and certain modes.
In one embodiment, the coupling-out module 160 includes at least three of the light splitting film arrays.
In one embodiment, the light splitting film array and the lower end surface of the waveguide sheet 150 form a second preset included angle.
In the embodiment, the coupling-out modules 160 may be parallel to each other, and are disposed in the waveguide sheet 150 at equal intervals, and have a splitting film array with a predetermined splitting ratio, the number of the splitting film arrays is generally greater than or equal to 3, and the splitting film arrays and the substrate of the waveguide sheet 150 form a predetermined included angle.
The object diffraction image light which is filtered by the filtering module 120 and carries the three-dimensional scene wavefront information distribution forms P light which is perpendicular to the incident plane through the linear polarizer 130, and then the P light enters the coupling triangular prism 140 and further enters the waveguide sheet 150. When the total reflection condition is satisfied, the coupled-in light can propagate forward to the coupling-out module 160 (which can be a light splitting film array or a coupling-out volume holographic grating) in the optical waveguide by means of total reflection, and then enter the human eye for imaging. The human eye can observe the holographically reconstructed three-dimensional virtual image, and the ambient light enters the human eye to be imaged through the coupling-out module 160 and the waveguide sheet 150 without being affected.
The utility model discloses among the real-time three-dimensional augmented reality near-to-eye display device who shows of developments, utilize self-luminous LCOS module 110 can provide the output light of high brightness and the characteristics of low-power consumption, the design is small and exquisite, high-efficient little display optical system, solve the problem that outdoor wear-type display luminance efficiency is not enough, slim and lightweight modular design moreover reduces the volume and the weight of component by a wide margin, reduce the system size and make the structure more compact simultaneously, be fit for the human body and wear. Meanwhile, the near-to-eye display device which is compact in structure and can dynamically display any three-dimensional object model in real time is realized by combining the advantage that the calculation of the holographic light wave field can be controlled at will.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (8)
1. An augmented reality near-to-eye display device for real-time dynamic three-dimensional display, comprising: the LCOS module comprises a self-luminous LCOS module, a filtering module, a linear polaroid, an incoupling triangular prism, a waveguide sheet and an outcoupling module;
the self-luminous LCOS module comprises an LCOS display provided with a white light LED, and light emitted by the LCOS display carries object diffraction image light, non-modulated zero-order light and diffraction image conjugate light distributed by three-dimensional scene wave front information;
the filtering module is parallel and opposite to the self-luminous LCOS module and is used for filtering the unmodulated zero-order light and the diffraction image conjugate light and converging the object diffraction image light carrying three-dimensional scene wave front information distribution and then enabling the object diffraction image light to enter the coupling-in triangular prism;
the incident surface of the incoupling triangular prism is a first long edge of the incoupling triangular prism, and the first long edge is parallel to the emergent surface of the filter module and is attached with the linear polarizer; the exit surface of the incoupling triangular prism is a second long edge of the incoupling triangular prism, the second long edge is attached to the incident end surface of the waveguide sheet, the upper end surface and the lower end surface of the waveguide sheet are parallel, and a first preset included angle is formed between the exit surface of the incoupling triangular prism and the upper end surface of the waveguide sheet;
the coupling-out module is arranged on the waveguide plate and used for coupling out the polarized light transmitted by the waveguide plate.
2. The augmented reality near-eye display device of claim 1, further comprising a controller, wherein the LED comprises R, G and a three-color B light source, and the controller is configured to control the LED to illuminate R, G and the three-color B light source in a time-sharing manner to achieve color illumination.
3. The near-to-eye augmented reality display device of claim 1 wherein the filtering module comprises a first lens, a second lens and a diaphragm arranged in sequence along the light path of the LCOS display emergent light, the diaphragm is arranged at the back focal plane of the first lens and arranged between the first focal length and the second focal length of the second lens.
4. The augmented reality near-eye display device of any one of claims 1 to 3, wherein the out-coupling module comprises a transmissive volume holographic grating or a reflective volume holographic grating.
5. The augmented reality near-eye display device of claim 4, wherein the transmissive volume holographic grating or the reflective volume holographic grating is a monolithic color volume holographic grating sensing red, green and blue light simultaneously; or the transmission type volume holographic grating or the reflection type volume holographic grating is a three-piece type color volume holographic grating formed by accurately aligning and stacking three monochromatic volume holographic gratings which sense red, green and blue; or the transmission type volume holographic grating or the reflection type volume holographic grating is a two-piece type color volume holographic grating formed by accurately aligning and stacking volume holographic gratings recorded by any two kinds of monochromatic light of red sensing, green sensing and blue sensing in the same area in a multiplexing mode and volume holographic gratings recorded by any one kind of monochromatic light of red sensing, green sensing and blue sensing.
6. The near-to-eye augmented reality display device of any one of claims 1 to 3, wherein the out-coupling module comprises a splitting film array with a preset splitting ratio, the splitting film arrays are parallel to each other and are placed in the waveguide at equal intervals.
7. The real-time dynamic three-dimensional display augmented reality near-eye display device of claim 6, wherein the out-coupling module comprises at least three of the splitting film arrays.
8. The device as claimed in claim 6, wherein the light splitting film array forms a second predetermined angle with a lower surface of the waveguide sheet.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462521A (en) * | 2020-12-08 | 2021-03-09 | 谷东科技有限公司 | Real-time dynamic three-dimensional display augmented reality near-to-eye display device |
| CN113703166A (en) * | 2021-07-30 | 2021-11-26 | 的卢技术有限公司 | AR-HUD method and system through diffraction holographic imaging |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462521A (en) * | 2020-12-08 | 2021-03-09 | 谷东科技有限公司 | Real-time dynamic three-dimensional display augmented reality near-to-eye display device |
| CN113703166A (en) * | 2021-07-30 | 2021-11-26 | 的卢技术有限公司 | AR-HUD method and system through diffraction holographic imaging |
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