CN213517755U - Augmented reality near-to-eye device with three-dimensional dynamic full-color display - Google Patents
Augmented reality near-to-eye device with three-dimensional dynamic full-color display Download PDFInfo
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Abstract
The utility model discloses a near-to-eye device of augmented reality of full-color demonstration of three-dimensional developments, include: the device comprises a self-luminous LCOS module, a filtering module and a volume holographic slab waveguide set; the self-luminous LCOS module comprises an LCOS display provided with a white light LED, the volume holographic panel waveguide group comprises a three-layer volume holographic panel waveguide, and the volume holographic panel waveguide comprises an adjustable attenuation sheet, an in-coupling volume holographic grating, an out-coupling volume holographic grating and a panel waveguide; the coupling-in body holographic grating and the coupling-out body holographic grating are formed by overlapping two composite body holographic gratings; the adjustable attenuation sheet is attached to the upper surface of the slab waveguide, the incoupling volume holographic grating and the outcoupling volume holographic grating are attached to the lower surface of the slab waveguide, the adjustable attenuation sheet and the incoupling volume holographic grating are arranged on the same light path side of the slab waveguide, and the outcoupling volume holographic grating is positioned at the other end of the slab waveguide, which is opposite to the incoupling volume holographic grating. The utility model discloses a compact structure, low-power consumption and can be to the nearly eye display device of the real-time dynamic display of arbitrary three-dimensional colored object model.
Description
Technical Field
The utility model relates to a nearly eye technical field especially relates to a near-to-eye device of augmented reality of full-color demonstration of three-dimensional developments.
Background
The augmented reality near-to-eye display device can enable a user to perform related operations in a semi-virtual environment, so that the sensory experience beyond reality is achieved, and the augmented reality near-to-eye display device is predicted to possibly replace a mobile phone to become an information interaction platform of the next generation.
However, at present, the optical scheme in the near-eye display device cannot accurately control the wavefront information of light to eliminate the convergence accommodation conflict, so that human beings can interact with the real environment in real time and on the spot without obstacles through natural visual impression. On the other hand, if a single-layer composite type holographic grating waveguide is used for transmitting a color image, the problem of serious crosstalk of similar color light can occur. And if the multilayer monochromatic volume holographic grating waveguide is adopted to respectively transmit R, G, B three-color light, the brightness of the coupled image is too low due to the angle selectivity of the volume holographic grating, and the brightness requirement of the augmented reality display device on the output image cannot be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a near-to-eye device of augmented reality of full-color display of three-dimensional developments, with LED lighting system and polarization spectroscope in the typical optical engine of tradition, combine together with LCOS microdisplay module, combine the advantage that the holographic light wave field of colored calculation can be controlled wantonly simultaneously to solve the great and accessible and real environment of current device volume and carry out real-time interactive functional problem on the spot.
In order to achieve the above object, an embodiment of the present invention provides an augmented reality near-to-eye device with three-dimensional dynamic full-color display, including: the device comprises a self-luminous LCOS module, a filtering module and a volume holographic slab waveguide set; 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 used for filtering the non-modulated zero-order light and the diffraction image conjugate light, and converging object diffraction image light carrying three-dimensional scene wave front information distribution and then injecting the converged object diffraction image light into the volume holographic slab waveguide group; the volume holographic slab waveguide group comprises a three-layer volume holographic slab waveguide, and the volume holographic slab waveguide comprises an adjustable attenuation sheet, an in-coupling volume holographic grating, an out-coupling volume holographic grating and a slab waveguide; the incoupling volume holographic grating comprises a first incoupling volume holographic grating and a second incoupling volume holographic grating; the coupled-out volume holographic grating comprises a first coupled-out volume holographic grating and a second coupled-out volume holographic grating; the adjustable attenuation sheet is attached to the upper surface of the slab waveguide, the incoupling volume holographic grating is attached to the lower surface of the slab waveguide, the adjustable attenuation sheet and the incoupling volume holographic grating are arranged on the same light path side of the slab waveguide, and the incoupling volume holographic grating is attached to the lower surface of the slab waveguide and is located at the other end, opposite to the incoupling volume holographic grating, of the slab waveguide.
In one embodiment, the augmented reality near-eye 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 focal length of the second lens and a double focal length.
In one embodiment, the first incoupling volume holographic grating and the second incoupling volume holographic grating are stacked and attached to the lower surface of the slab waveguide, and the first incoupling volume holographic grating and the second incoupling volume holographic grating are two identical reflective volume holographic gratings; the first coupling-out body holographic grating and the second coupling-out body holographic grating are compositely stacked and attached to the lower surface of the slab waveguide, and the first coupling-out body holographic grating and the second coupling-out body holographic grating are two identical reflection type body holographic gratings.
In one embodiment, the incoupling volume holographic grating and the outcoupling volume holographic grating are mirror images.
In one embodiment, the slab waveguide material comprises transparent optical glass or transparent optical plastic.
In one embodiment, the volume holographic slab waveguide set includes a first volume holographic slab waveguide, a second volume holographic slab waveguide and a third volume holographic slab waveguide which are sequentially arranged along a light path of light emitted by the LCOS display, and each volume holographic slab waveguide includes the adjustable attenuator, the incoupling volume holographic grating, the outcoupling volume holographic grating and the slab waveguide; wherein the incoupling volume holographic grating of the first volume holographic slab waveguide is opposite to the adjustable attenuator of the second volume holographic slab waveguide, and the incoupling volume holographic grating of the second volume holographic slab waveguide is opposite to the adjustable attenuator of the third volume holographic slab waveguide; the coupled-out volume holographic grating of the first volume holographic slab waveguide, the coupled-out volume holographic grating of the second volume holographic slab waveguide, and the coupled-out volume holographic grating of the third volume holographic slab waveguide are all located on the same side.
The utility model discloses in the near-to-eye device of the full-color augmented reality that shows of three-dimensional developments, utilize self-luminous LCOS module can provide the output light of high brightness and the characteristics of low-power consumption, design small and exquisite, high-efficient little display optical system, reduce 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 color object model in real time is realized by combining the advantage that a color calculation 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 device with a three-dimensional dynamic full-color display according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a filtering imaging of a filtering system according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of the exit pupil of a conventional volume holographic waveguide;
fig. 4 is a schematic diagram illustrating an extension of an exit pupil distance of a volume holographic waveguide of a two-piece composite volume holographic grating stacked structure according to an embodiment of the present invention;
fig. 5 is a schematic diagram of the improvement of the light and dark stripes of the volume holographic waveguide of the two-piece composite volume holographic grating stacked structure according to another 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 device with three-dimensional dynamic full-color display, including: a self-emissive LCOS module 110, a filtering module 120, and a volume holographic slab waveguide set 130.
The self-emissive LCOS module 110 comprises an LCOS display equipped with white LEDs, which emits light carrying object diffraction image light, unmodulated zero-order light, and diffraction image conjugate light of a three-dimensional scene wavefront information distribution.
The filtering module 120 is 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 converged object diffraction image light into the volume hologram slab waveguide set 130.
The volume hologram slab waveguide set 130 includes a volume hologram slab waveguide 131, and the volume hologram slab waveguide 131 includes an adjustable attenuator 131a, an incoupling volume hologram grating 131c, an outcoupling volume hologram grating 131d, and a slab waveguide 131 b; incoupling volume holographic grating 131c includes first incoupling volume holographic grating 131c1 and second incoupling volume holographic grating 131c 2; outcoupled volume holographic grating 131d includes first outcoupled volume holographic grating 131d1 and second outcoupled volume holographic grating 131d 2; the adjustable attenuator 131a is attached to the upper surface of the slab waveguide 131b, the incoupling volume hologram grating 131c is attached to the lower surface of the slab waveguide 131b, the adjustable attenuator 131a and the incoupling volume hologram grating 131c are disposed on the same light path side of the slab waveguide 131b, and the outcoupling volume hologram grating 131d is attached to the lower surface of the slab waveguide 131b and is located at the other end of the slab waveguide 131b opposite to the incoupling volume hologram grating 131 c.
In this embodiment, the self-light emitting LCOS module 110 is a 0.22 inch high-efficiency self-light emitting LCOS display module and is equipped with a white LED backlight, and in other embodiments, the self-light emitting LCOS module 110 may also be a 0.35 inch high-efficiency self-light emitting LCOS display module, which is not limited herein. When a three-dimensional color calculation 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 color calculation hologram and carry three-dimensional scene wavefront information distribution.
The filtering system 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 volume hologram slab waveguide set 130. The device utilizes the characteristics that the self-luminous LCOS module 110 can provide high brightness and low power consumption, designs a small and exquisite high-efficiency micro-display optical system, greatly reduces the volume and the weight of elements, reduces the system size, simultaneously leads the structure to be more compact, is suitable for being worn by a human body, simultaneously combines the advantages that the color calculation holographic light wave field can be controlled at will, and realizes the near-to-eye display device which has compact structure and can dynamically display any three-dimensional color object model in real time.
In one embodiment, the augmented reality near-eye 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. The three-dimensional color computed hologram is obtained by respectively extracting R, G, B components from the wavefront information of the colored three-dimensional object at different angles, coding, recording, superposing and fusing, and then controlling the self-luminous LCOS module 110 to load the time interval of each frame of color computed hologram, so that the three-dimensional scene wavefront information distribution carrying R, G, B three-color light components is carried in the emergent light of the self-luminous LCOS module 110. And due to the persistence effect of human eyes, the dynamically displayed holographic display effect of the wave-front reconstruction of the colorful three-dimensional scene can be observed at the positions of the human eyes.
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 outgoing light of the LCOS display is imaged on a first plane (plane1) through a first Lens (Lens1)121, a stop 122 is disposed at a back focal plane of the first Lens (Lens1)121, the stop 122 is offset from an 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 then the light is converged by a second Lens (Lens2)123 and then enters the volume hologram slab waveguide set 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 123z2A clear reproduced image can be observed at plane 3(plane 3). 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.
In one embodiment, the first incoupling volume holographic grating 131c1 and the second incoupling volume holographic grating 131c2 are stacked on the lower surface of the slab waveguide 131b, and the first incoupling volume holographic grating 131c1 and the second incoupling volume holographic grating 131c2 are two identical reflective volume holographic gratings; the first out-coupling volume holographic grating 131d1 and the second out-coupling volume holographic grating 131d2 are stacked and attached to the lower surface of the slab waveguide 131b, and the first out-coupling volume holographic grating 131d1 and the second out-coupling volume holographic grating 131d2 are two identical reflective volume holographic gratings.
In this embodiment, both the in-coupling volume hologram grating 131c and the out-coupling volume hologram grating 131d are formed by superimposing two composite volume hologram gratings, that is, the in-coupling volume hologram grating 131c includes a first in-coupling volume hologram grating 131c1 and a second in-coupling volume hologram grating 131c2, the first in-coupling volume hologram grating 131c1 and the second in-coupling volume hologram grating 131c2 are combined and stacked to be attached to the lower surface of the slab waveguide 131b, the out-coupling volume hologram grating 131d also includes a first out-coupling volume hologram grating 131d1 and a second out-coupling volume hologram grating 131d2, and the first out-coupling volume hologram grating 131d1 and the second out-coupling volume hologram grating 131d2 are also combined and stacked to be attached to the lower surface of the slab waveguide 131 b. The first in-coupling volume hologram grating 131c1 and the second in-coupling volume hologram grating 131c2 are two identical reflection type volume hologram gratings, and similarly, the first out-coupling volume hologram grating 131d1 and the second out-coupling volume hologram grating 131d2 are also two identical reflection type volume hologram gratings. In one embodiment, in-coupling volume holographic grating 131c and out-coupling volume holographic grating 131d are mirror images.
Referring to fig. 3, 4 and 5, in the present embodiment, the in-coupling volume hologram grating 131c and the out-coupling volume hologram grating 131d are mirror-symmetric, and the volume hologram grating waveguide having the stacked structure of two composite volume hologram gratings can effectively reuse 0 th order diffracted light lost by the first in-coupling volume hologram grating 131c1 of the in-coupling volume hologram grating 131c due to being directly transmitted out of the waveguide, so that the 0 th order diffracted light is diffracted into the waveguide at the second in-coupling volume hologram grating 131c2, thereby improving the light efficiency. Meanwhile, at one end of the coupler holographic grating 131d, the first coupler holographic grating 131d1 and the second coupler holographic grating 131d2 can couple out the transmission light simultaneously, so that the propagation period of the light in the optical waveguide is increased, the pupil gap of each field of view light is eliminated, pupil expansion is realized, the continuity and integrity of the final image are ensured, and the light and dark stripes of the displayed image can be improved.
In one embodiment, the slab waveguide 131b is made of transparent optical glass or transparent optical plastic.
In this embodiment, the material of the slab waveguide 131b is transparent optical glass, and in other embodiments, the material of the slab waveguide 131b may also be transparent optical plastic, which is not limited herein.
In a certain embodiment, the volume holographic slab waveguide set 130 includes a first volume holographic slab waveguide 131, a second volume holographic slab waveguide 132, and a third volume holographic slab waveguide 133 sequentially arranged along the light path of the light emitted from the LCOS display, and each volume holographic slab waveguide includes the adjustable attenuator, the incoupling volume holographic grating, the outcoupling volume holographic grating, and the slab waveguide. Wherein the incoupling volume holographic grating 131c of the first volume holographic slab waveguide 131 is opposite to the adjustable attenuation plate of the second volume holographic slab waveguide 132, and the incoupling volume holographic grating of the second volume holographic slab waveguide is opposite to the adjustable attenuation plate of the third volume holographic slab waveguide; the out-coupling volume hologram grating 131d of the first volume hologram slab waveguide 131, the out-coupling volume hologram grating of the second volume hologram slab waveguide 132, and the out-coupling volume hologram grating of the third volume hologram slab waveguide 133 are located on the same side.
In this embodiment, the volume holographic slab waveguide set 130 includes three layers of volume holographic slab waveguides, namely a first volume holographic slab waveguide 131, a second volume holographic slab waveguide 132 and a third volume holographic slab waveguide 133, and uses the wavelength selectivity of the volume holographic grating to perform diffraction transmission on red light, green light and blue light separately and couple out to the human eye for imaging, so as to reduce the dispersion and crosstalk of near-color light. Each layer holographic slab waveguide comprises an adjustable attenuation sheet, an incoupling volume holographic grating, an outcoupling volume holographic grating and a slab waveguide.
Specifically, the object diffraction image light carrying three-dimensional scene wavefront information distribution after being filtered by the filtering module 120 may pass through the first holographic slab waveguide 131The first incoupling volume holographic grating 131c1 VHG _ R perpendicularly incident to the incoupling end of the first volume holographic slab waveguide 131 by the attenuation adjusting sheet 131ain1Due to the wavelength selectivity of the volume holographic grating, only the minus first order diffracted light of red light is coupled into the optical waveguide, while the 0 th order diffracted light of red light will be transmitted out of the waveguide perpendicularly and incident on the second incoupling volume holographic grating 131c2 VHG _ Rin2Then, the diffraction occurs, and the negative first order diffraction light in the diffraction light is coupled into the optical waveguide. When the total reflection condition is satisfied, the two coupled-in diffraction light beams can be propagated forwards in the optical waveguide in a total reflection mode to the coupling-out end body holographic grating for diffraction coupling. Since at the out-coupling end the first out-coupling volume holographic grating 131d1 VHG _ Rou1And a second outcoupling body holographic grating 131d2 VHG _ Rou2The transmission light can be coupled out simultaneously, so that the propagation period of the light in the optical waveguide is increased, the pupil gap of each field light is eliminated, the pupil expansion is realized, the continuity and the integrity of the final image are ensured, and the bright and dark stripes of the displayed image can be improved. Then, the object diffraction image carrying the three-dimensional scene wave front information distribution, from which the red light is filtered, is vertically incident to the first incoupling volume holographic grating VHG _ G at the coupling end of the second volume holographic slab waveguide 132 through the adjustable attenuation sheet of the second volume holographic slab waveguide 132in1Due to the wavelength selectivity of the volume holographic grating, only the negative first-order diffracted light of the green light is coupled into the optical waveguide, and the 0-order diffracted light of the green light is vertically transmitted out of the waveguide and is incident on the second coupled-in volume holographic grating VHG _ Gin2Then, the diffraction occurs, and the negative first order diffraction light in the diffraction light is coupled into the optical waveguide. When the total reflection condition is satisfied, the two coupled-in diffraction light beams can be propagated forwards to the coupling-out end-body holographic grating VHG _ G in the optical waveguide in a total reflection mannerou1/VHG_Gou2Diffraction is coupled out.
Similarly, the object diffraction image light with the red light and the green light filtered and the three-dimensional scene wavefront information distribution is vertically incident to the first incoupling volume holographic grating VHG _ B at the incoupling end of the third volume holographic slab waveguide 133 through the adjustable attenuation sheet of the third volume holographic slab waveguide 133in1Due to the wavelength selectivity of the volume holographic grating, only the negative first order diffracted light of the blue light is coupled into the optical waveguide, while the blue light is coupled into the optical waveguideWill be vertically transmitted out of the waveguide and incident on the second incoupling volume holographic grating VHG _ Bin2Then, the diffraction occurs, and the negative first order diffraction light in the diffraction light is coupled into the optical waveguide. When the total reflection condition is satisfied, the two coupled-in diffraction light beams can be propagated forwards to the coupling-out end-body holographic grating VHG _ B in the optical waveguide in a total reflection mannerou1/VHG_Bou2Diffraction is coupled out. And finally, three beams of monochromatic coupled-out diffraction light enter human eyes for imaging to form a full-color image, the full-color holographic reconstruction three-dimensional virtual image can be observed at the human eyes, and the ambient light enters the human eyes for imaging through the coupling-out device and the waveguide sheet without being influenced.
The three-dimensional color calculation hologram is obtained by respectively extracting R, G, B components from wave front information of a colored three-dimensional object at different angles, coding, recording, superposing and fusing, and then controlling the time interval of LCOS loading each frame of color calculation hologram, so that emergent light of the LCOS carries the three-dimensional scene wave front information distribution of R, G, B three-color light components. And due to the persistence effect of human eyes, the dynamically displayed holographic display effect of the wave-front reconstruction of the colorful three-dimensional scene can be observed at the positions of the human eyes.
The utility model discloses in the near-to-eye device of the full-color augmented reality that shows of three-dimensional developments, utilize self-luminous LCOS module can provide the output light of high brightness and the characteristics of low-power consumption, design small and exquisite, high-efficient little display optical system, reduce 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 color object model in real time is realized by combining the advantage that a color calculation 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 (7)
1. An augmented reality near-to-eye device for three-dimensional dynamic full-color display, comprising: the device comprises a self-luminous LCOS module, a filtering module and a volume holographic slab waveguide set;
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 used for filtering the non-modulated zero-order light and the diffraction image conjugate light, and converging object diffraction image light carrying three-dimensional scene wave front information distribution and then injecting the converged object diffraction image light into the volume holographic slab waveguide group;
the volume holographic slab waveguide group comprises a volume holographic slab waveguide, and the volume holographic slab waveguide comprises an adjustable attenuation sheet, an in-coupling volume holographic grating, an out-coupling volume holographic grating and a slab waveguide; the incoupling volume holographic grating comprises a first incoupling volume holographic grating and a second incoupling volume holographic grating; the coupled-out volume holographic grating comprises a first coupled-out volume holographic grating and a second coupled-out volume holographic grating; the adjustable attenuation sheet is attached to the upper surface of the slab waveguide, the incoupling volume holographic grating is attached to the lower surface of the slab waveguide, the adjustable attenuation sheet and the incoupling volume holographic grating are arranged on the same light path side of the slab waveguide, and the incoupling volume holographic grating is attached to the lower surface of the slab waveguide and is located at the other end, opposite to the incoupling volume holographic grating, of the slab waveguide.
2. The three-dimensional dynamic full-color display augmented reality near-eye device of claim 1, further comprising a controller, wherein the LED comprises R, G and a B three-color light source, and the controller is configured to control the LED to illuminate R, G and the B three-color light source in a time-sharing manner to realize color illumination.
3. The near-to-eye device of augmented reality of three-dimensional dynamic full-color display of claim 1, wherein the filtering module comprises a first lens, a second lens and a diaphragm sequentially arranged along the optical path of the light emitted from the LCOS display, the diaphragm is arranged at the back focal plane of the first lens and arranged between the focal length of one time and the focal length of two times of the second lens.
4. The three-dimensional dynamic full-color display augmented reality near-eye device of claim 1, wherein the first incoupling volume holographic grating and the second incoupling volume holographic grating composite stack are attached to the lower surface of the slab waveguide, and the first incoupling volume holographic grating and the second incoupling volume holographic grating are two identical reflective volume holographic gratings;
the first coupling-out body holographic grating and the second coupling-out body holographic grating are compositely stacked and attached to the lower surface of the slab waveguide, and the first coupling-out body holographic grating and the second coupling-out body holographic grating are two identical reflection type body holographic gratings.
5. The three-dimensional dynamic full-color displayed augmented reality near-eye device of claim 1, wherein the in-coupling volume holographic grating and the out-coupling volume holographic grating are mirror symmetric.
6. The three-dimensional dynamic full-color display augmented reality near-eye device of claim 1, wherein the slab waveguide material comprises transparent optical glass or transparent optical plastic.
7. The three-dimensional dynamic full-color display augmented reality near-eye device according to any one of claims 4 to 6, wherein the volume holographic slab waveguide set comprises a first volume holographic slab waveguide, a second volume holographic slab waveguide and a third volume holographic slab waveguide which are sequentially arranged along the optical path of the light emitted by the LCOS display, and each volume holographic slab waveguide comprises the adjustable attenuator, the in-coupling volume holographic grating, the out-coupling volume holographic grating and the slab waveguide;
wherein the incoupling volume holographic grating of the first volume holographic slab waveguide is opposite to the adjustable attenuator of the second volume holographic slab waveguide, and the incoupling volume holographic grating of the second volume holographic slab waveguide is opposite to the adjustable attenuator of the third volume holographic slab waveguide;
the coupled-out volume holographic grating of the first volume holographic slab waveguide, the coupled-out volume holographic grating of the second volume holographic slab waveguide, and the coupled-out volume holographic grating of the third volume holographic slab waveguide are all located on the same side.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485906A (en) * | 2020-12-08 | 2021-03-12 | 谷东科技有限公司 | Augmented reality near-to-eye device with three-dimensional dynamic full-color display |
| WO2023056818A1 (en) * | 2021-10-08 | 2023-04-13 | 煤炭科学研究总院有限公司 | Ar-based holographic head-mounted display system, method, and holographic headset |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485906A (en) * | 2020-12-08 | 2021-03-12 | 谷东科技有限公司 | Augmented reality near-to-eye device with three-dimensional dynamic full-color display |
| WO2023056818A1 (en) * | 2021-10-08 | 2023-04-13 | 煤炭科学研究总院有限公司 | Ar-based holographic head-mounted display system, method, and holographic headset |
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