CN114779478A - Layered stacked array optical waveguide and head-mounted device - Google Patents
Layered stacked array optical waveguide and head-mounted device Download PDFInfo
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- CN114779478A CN114779478A CN202210701880.XA CN202210701880A CN114779478A CN 114779478 A CN114779478 A CN 114779478A CN 202210701880 A CN202210701880 A CN 202210701880A CN 114779478 A CN114779478 A CN 114779478A
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- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
Abstract
The invention provides a layered stacked array optical waveguide and a head-mounted device. The light splitting prism array comprises at least two light splitting prism modules, and the light splitting surfaces of the light splitting prism modules are parallel and arranged at a certain interval and form a certain inclination angle with the optical waveguide; each beam splitting prism module in the beam splitting prism array comprises at least one layer of beam splitting prism, each layer of beam splitting prism in the beam splitting prism module is overlapped and glued, the beam splitting surfaces of each layer of beam splitting prism are connected to form the beam splitting surface of the beam splitting prism module, and the reflectivity of the beam splitting film layer plated on the beam splitting surface of each layer of beam splitting prism enables the power of light reflected by each layer of beam splitting prism in the same beam splitting prism module to be consistent. The invention can reduce the interference of bright and dark stripes on the display effect of the image displayed by the array optical waveguide, improve the brightness uniformity and the definition of the image and improve the use experience of a user.
Description
Technical Field
The invention relates to the technical field of optical waveguides, in particular to a layered array optical waveguide and a head-mounted device.
Background
Augmented Reality (AR) technology is a technology for fusing virtual information with the real world, and has very wide application prospect in the fields of industry, consumer electronics and the like. The optical waveguide couples light into the substrate and then couples the light out through total reflection transmission, has the characteristics of lightness, thinness and high penetrability of external light, relatively meets the requirements of consumer-grade AR equipment, and is widely applied to the AR equipment in recent years.
The arrayed optical waveguide is an optical component applied to an AR device, which realizes light outcoupling and pupil expansion through a beam splitter prism array. The array optical waveguide is formed by sequentially gluing a plurality of beam splitting prisms, and plating a beam splitting film layer with certain reflectivity on the beam splitting surface of each beam splitting prism. In order to ensure the brightness uniformity of the whole output image, the reflectivity of the splitting surface of each beam splitter prism needs to be designed according to a certain rule, so that the light intensities of the light rays reflected by the splitting surfaces of different beam splitter prisms in the beam splitter prism array are consistent.
At present, the reflectivity of the splitting surfaces of the splitting prisms in the splitting prism array of the array optical waveguide is generally designed according to an equal-ratio law, that is, the reflectivity of the splitting surfaces of the splitting prisms increases sequentially along the light propagation direction, for example, the reflectivity of the splitting surface of a first splitting prism is 20%, the reflectivity of the splitting surface of a second splitting prism is 25%, the reflectivity of the splitting surface of a third splitting prism is 33.3%, and the reflectivity of the splitting surface of a fourth splitting prism is 50%.
However, actually, the transmission rules of the coupled light in the optical waveguide are different, which causes the difference in the light intensity of the light reflected by different positions of the splitting surface of the same splitting prism, so that the reflectivity of the splitting surface is designed according to the geometric rule, the observed image still has obvious bright and dark stripes, and the existence of the bright and dark stripes can reduce the brightness uniformity and the definition of the displayed image, and affect the use experience of the user.
Disclosure of Invention
The invention provides a layered array optical waveguide and a head-mounted device, which are used for solving the problems that in the prior art, the reflectivity of a splitting surface of the array optical waveguide is simply designed according to an equal proportion rule, so that obvious bright and dark stripes exist in a displayed image, and the brightness uniformity and the definition of the displayed image are reduced, the difference of light intensity of light rays reflected from different positions of the splitting surface of the same splitting prism module can be reduced, the interference of the bright and dark stripes on the display effect of the image displayed by the array optical waveguide is reduced, the brightness uniformity and the definition of the image are improved, and the use experience of a user is improved.
In a first aspect, the invention provides a layered and arrayed optical waveguide, wherein a light-splitting prism array is arranged in a light coupling-out area of the optical waveguide, the light-splitting prism array comprises at least two light-splitting prism modules, and light-splitting surfaces of the light-splitting prism modules are parallel and arranged at a certain interval and form a certain inclination angle with the optical waveguide;
each beam splitting prism module in the beam splitting prism array comprises at least one layer of beam splitting prism, each layer of beam splitting prism in the beam splitting prism module is superposed and glued, the beam splitting surfaces of each layer of beam splitting prism are connected to form the beam splitting surface of the beam splitting prism module, and the reflectivity of the beam splitting film layer plated on the beam splitting surface of each layer of beam splitting prism enables the power of light reflected by each layer of beam splitting prism in the same beam splitting prism module to be consistent.
According to the layered superposition array optical waveguide provided by the invention, for each light splitting prism module in the light splitting prism array, the layer number of the light splitting prisms is determined according to the times that light rays transmit other light splitting prism modules in the light splitting prism array before being reflected by the light splitting prism modules.
According to the layered stacked array optical waveguide provided by the invention, the first beam splitter prism module in the beam splitter prism array along the light propagation direction comprises a layer of beam splitter prisms, and the beam splitting film layer plated on the beam splitting surface of the beam splitter prism has a reflectivity.
According to the layered stacked array optical waveguide provided by the invention, each of the other beam splitting prism modules in the beam splitting prism array except the first beam splitting prism module along the light propagation direction comprises at least two layers of beam splitting prisms, and the reflectivity of the beam splitting film layers plated on the beam splitting surfaces of at least two layers of beam splitting prisms in each layer of beam splitting prisms is different.
According to the layered stacked array optical waveguide provided by the invention, for each other beam splitting prism module except the first beam splitting prism module in the beam splitting prism array along the light propagation direction, the number of layers of the beam splitting prisms is determined according to the number of times that light transmits the previous beam splitting prism module before being reflected by the beam splitting prism module.
According to the layered and superposed array optical waveguide provided by the invention, the power of the light reflected by the plated light splitting film layer on the light splitting surface of each layer of light splitting prism in each light splitting prism module except the first light splitting prism module in the light splitting prism array along the light propagation direction is determined according to the reflectivity of the light splitting film layer, the times of transmitting the light to other light splitting prism modules and the transmissivity of the other transmitted light splitting prism modules.
According to the layered stacked array optical waveguide provided by the invention, the thickness of each layer of the beam splitter prism in each beam splitter prism module except the first beam splitter prism module in the beam splitter prism array along the light propagation direction is determined according to the thickness of the optical waveguide, the material of the optical waveguide, the inclination angle of the beam splitting surface of the beam splitter prism module and the distance between the beam splitting surfaces of the beam splitter prism modules.
In a second aspect, the invention provides a head-mounted device comprising a lens made of the layered stacked array optical waveguide according to the first aspect.
According to the head-mounted equipment provided by the invention, the head-mounted equipment is augmented reality glasses.
According to the head-mounted device provided by the invention, the head-mounted device is an augmented reality helmet.
According to the layered superposition array optical waveguide and the head-mounted device provided by the embodiment of the invention, each beam splitter prism module in the beam splitter prism array of the array optical waveguide is laminated, superposed and glued, so that the difference of light intensity of light rays reflected by different positions of the beam splitting surface of the same beam splitter prism module can be reduced, the interference of bright and dark stripes on the display effect of an image displayed by the array optical waveguide is reduced, the brightness uniformity and the definition of the image are improved, and the use experience of a user is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a layered stacked array optical waveguide provided by the present invention;
fig. 2 is a schematic optical path diagram of a first beam splitter prism module in a layered stacked array optical waveguide provided by the present invention;
FIG. 3 shows a first layer of beam splitter prism L2 in a second beam splitter prism module in a layered stacked array optical waveguide provided by the present invention1Schematic diagram of the optical path of (a);
FIG. 4 shows a second beam splitter prism L2 in a second beam splitter prism module in a stacked layered array optical waveguide provided by the present invention2Schematic diagram of the optical path of (a);
FIG. 5 shows a third beam splitter prism L2 in the second beam splitter prism module of the stacked layered array optical waveguide provided by the present invention3Schematic diagram of the optical path of (1).
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic view of a layered stacked array optical waveguide according to the present invention, and as shown in fig. 1, a layered stacked array optical waveguide is provided according to the present invention, a beam splitting prism array 110 is disposed in a light coupling-out region of an optical waveguide 100, and the beam splitting prism array 110 includes at least two beam splitting prism modules. The number of the prism modules in the prism array 110 may be determined according to the actual light coupling-out and pupil expanding requirements of the array light guide 100, and the number of the prism modules in the prism array 110 is not limited in the embodiment of the present invention. For example, the beam splitter prism array 110 may include m beam splitter prism modules L1, L2, … …, Lm, where m ≧ 2, and only L1-L4 are shown in the figure. The splitting surfaces of the splitting prism modules in the splitting prism array 110 are parallel and arranged at a certain interval, and form a certain inclination angle with the optical waveguide 100, that is, a splitting inclination angle. The distance between the splitting surfaces of the splitting prism modules in the splitting prism array 110 and the inclination angle between the splitting surfaces and the optical waveguide 100 can be determined according to the actual light coupling and pupil expanding requirements of the array optical waveguide 100. For example, the light splitting surfaces of the m light splitting prism modules L1, L2, … …, Lm in the light splitting prism array 110 are arranged in parallel at the pitch d and the inclination angle β.
Each beam splitter prism module in the beam splitter prism array 110 includes at least one layer of beam splitter prism, each layer of beam splitter prism in the beam splitter prism module is overlapped and glued, and the beam splitting surfaces of each layer of beam splitter prism are connected to form the beam splitting surface of the beam splitter prism module, and the beam splitting surface of each layer of beam splitter prism is plated with the reflectivity of the beam splitting film layer, so that the power of the light reflected from each layer of beam splitter prism in the same beam splitter prism module is consistent. Since different light path conditions before light is reflected by the light splitting surface of one light splitting prism module have different influences on light intensity, the number of layers of each light splitting prism module in the light splitting prism array 110, that is, how many layers of light splitting prisms are included, may be determined according to the type of the light path condition before light is reflected by the light splitting surface of the light splitting prism module. For example, in the beam splitter prism module L1 in the beam splitter prism array 110, the light is reflected by the splitting surface of the beam splitter prism module L1Only 1 kind of light path condition exists before the outgoing light, the beam splitting prism module L1 includes a layer of beam splitting prism, the beam splitting prism module L2 in the beam splitting prism array 110, there are n kinds of light path condition before the light is reflected by the beam splitting surface of the beam splitting prism module L2, the beam splitting prism module L2 includes n layers of beam splitting prisms L21、L22、……、L2nN-layer beam splitter prism L21、L22、……、L2nAnd sequentially laminating and gluing, wherein n is more than or equal to 2.
On the basis that the reflectivities of the splitting surfaces of the splitting prism modules in the splitting prism array 110 are designed according to the geometric rule, in order to make the light intensities of the light rays reflected from different positions of the splitting surface of the same splitting prism module consistent, the reflectivities of the splitting film layers plated on the splitting surfaces of the splitting prisms in each splitting prism module in the splitting prism array 110 can be determined according to the consistency of the powers of the light rays reflected from the splitting surfaces of the splitting prisms in the same splitting prism module. The reflectivity of the light splitting film layers plated on the light splitting surfaces of all the superposed and glued light splitting prisms in the same light splitting prism module can be different; or the reflectivities of the splitting films plated on the splitting surfaces of some splitting prisms in all the splitting prisms laminated in the same splitting prism module may be different, and the reflectivities of the splitting films plated on the splitting surfaces of other splitting prisms may be the same. For example, the reflectivity of the n-layer laminated splitter prism coated splitter film layers of the splitter prism module L2 in the splitter prism array 110 is R21、R22、……、R2nThe power of the light reflected by the beam splitting film layer plated on the n-layer superposed and glued beam splitting prism is IL21、I L22、……、I L2nAccording to IL21=I L22=……=I L2nThe relation between the power of the reflected light and the reflectivity of the light splitting film layer, and the reflectivity of the light splitting surface of the light splitting prism module L2 designed according to the geometric rule in the light splitting prism array 110 can be determinedThe mirror module L2 comprises n superposed and glued reflection indexes R2 of beam splitting film layers plated on beam splitting prisms1、R22、……、R2n。
Since the light path condition before the light is reflected by the splitting surface of one splitting prism module in the splitting prism array 110 is mainly related to the thickness of the optical waveguide 100, the material of the optical waveguide 100, the inclination angle of the splitting surface of the splitting prism module, and the pitch of the splitting surface of the splitting prism module, the thickness of each layer of splitting prism in each splitting prism module in the splitting prism array 110 can be determined according to the thickness of the optical waveguide 100, the material of the optical waveguide 100, the inclination angle of the splitting surface of the splitting prism module, and the pitch of the splitting surface of the splitting prism module. For example, the n-layered cemented splitting prism L2 in the splitting prism module L2 may be determined according to the thickness h of the optical waveguide 100, the fused silica of the optical waveguide 100, the inclination angle β of the splitting plane of the splitting prism module, and the pitch d of the splitting plane1、L22、……、L2nThickness h21、h22、……、h2nWherein h21+h22+……+h2nH, only h2 is shown in the figure1~ h24。
According to the layered overlapping array optical waveguide provided by the embodiment of the invention, each beam splitter prism module in the beam splitter prism array of the array optical waveguide is laminated, overlapped and glued, so that the difference of light intensity of light rays reflected by different positions of the beam splitting surface of the same beam splitter prism module can be reduced, the interference of bright and dark stripes on the display effect of an image displayed by the array optical waveguide is reduced, the brightness uniformity and the definition of the image are improved, and the use experience of a user is improved.
In some alternative examples, for each beam splitting prism module in the beam splitting prism array 110, the number of layers of the beam splitting prism may be determined according to the number of times that the light is transmitted through other beam splitting prism modules in the beam splitting prism array 110 before being reflected by the beam splitting prism module. At this time, the first prism module along the light propagation direction in the prism array 110 includes a layer of prisms, and the splitting surfaces of the layer of prisms are coated with a splitting film having a reflectivity. Each of the other prismatic modules in the prismatic array 110, except the first prismatic module, includes at least two layers of prisms, and the reflectivity of the prismatic film coated on the prismatic surface of at least two layers of prisms in each layer of prisms is different. The power of the light reflected by the plated light splitting film layer on the light splitting surfaces of the light splitting prisms in each of the other light splitting prism modules in the light splitting prism array 110, except for the first light splitting prism module, along the light propagation direction can be determined according to the reflectivity of the light splitting film layer, the number of times that the light transmits through the other light splitting prism modules, and the transmittance of the other transmitted light splitting prism modules.
Referring to fig. 2, fig. 3, fig. 4 and fig. 5, fig. 2 is a schematic diagram of an optical path of a first beam splitter prism module in a layered stacked array optical waveguide provided by the present invention, and fig. 3 is a schematic diagram of a first layer beam splitter prism L2 in a second beam splitter prism module in a layered stacked array optical waveguide provided by the present invention1Fig. 4 is a schematic diagram of an optical path of a second layer beam splitter prism L2 in a second beam splitter prism module in the layered stacked array optical waveguide provided by the present invention2Fig. 5 is a schematic diagram of an optical path of the stacked-layer array optical waveguide provided by the present invention, and fig. 5 is a schematic diagram of a third layer of a splitting prism L2 in a second splitting prism module3Schematic diagram of the optical path of (a).
As shown in fig. 2, the prism splitter array 110 may include four prism splitter modules L1, L2, L3, and L4, where the prism splitter module L1 is the first prism splitter module, and for total reflection light rays incident at any angle α, there are only 1 optical path condition before being reflected by the splitting surface of the prism splitter module L1, so that the whole prism splitter module L1 includes one prism splitter coated with only one kind of splitting film layer, the reflectivity of the splitting film layer coated with the prism splitter module L1 is R1, and then the power of the light rays reflected by the prism splitter module L1 is R1. The beam splitter prism module L2 is the second beam splitter prism module, and there are 3 optical path conditions before the light is reflected by the beam splitter prism module L2, so the whole beam splitter prism module L2 includes a three-layer beam splitter prism L21、L22、L23Three-layer beam splitter prism L21、L22、L23SuperpositionAnd (6) gluing. As shown in FIG. 3, the light is split into a first layer of beam splitter prisms L2 in a beam splitter prism module L21Before reflection, the beam splitter prism module L1 is transmitted only once; as shown in fig. 4, the light is split into a second layer of beam splitter prisms L2 in the beam splitter prism module L22Before reflection, the beam splitter prism module L1 is transmitted for three times; as shown in fig. 5, the light is split into three layers of beam splitters L2 in the beam splitter prism module L23Before reflection, the beam splitter prism module L1 is transmitted once. Three-layer beam splitter L2 in beam splitter module L21、L22、L23The reflectivity of the coated light splitting film layer is R2 respectively1、R22、R23Three-layered beam splitter L2 of beam splitter L21、L22、L23The power of the reflected light is IL21、I L22、I L23Then I isL21=T1R21，I L22=T13R22，I L23= T1R23Wherein T1 is the transmittance of the beam splitting prism module L1 according to IL21=IL22=IL23The three-layer beam splitter L2 in the beam splitter module L2 can be determined1、L22、L23The reflectivity of the coated light splitting film layer meets R21= R23 = T12R22At this time, the beam splitter prism L21And a beam splitter prism L23The reflectivity of the coated beam splitting film layer is the same, and the beam splitting prism L21A beam splitter prism L23And a beam splitter prism L22The reflectivity of the coated light splitting film layers is different, and the light splitting prism L21A beam splitter prism L23The reflectivity of the coated beam splitting film layer is less than that of the beam splitting prism L22The reflectivity of the coated light splitting film layer. If the beam splitter prism module L2 is an integral prism and is not laminated, i.e. only one beam splitter film is plated on the beam splitter prism module L2, the beam splitter prism L2 is used2The power of the light reflected by the corresponding area is much smaller than that of the beam splitter prism L21And a beam splitter prism L23The power of the light reflected off the corresponding area causes the displayed image to form a noticeable dark fringe.
In other alternative examples, for each of the other prism modules in the prism array 110 except the first prism module in the light propagation direction, the number of layers of the splitting prism may be determined according to the number of times that the light passes through the previous prism module before being reflected by the first prism module. That is, for the second prism module in the prism array 110, the number of layers of the prisms may be determined according to the number of times that the light passes through the first prism module before being reflected by the second prism module; for the third prism module in the prism array 110, the number of layers of the prisms may be determined only according to the number of times that the light transmits the second prism module before being reflected by the third prism module, regardless of the number of times that the light transmits the first prism module; and so on for the remaining beam splitting prism modules in the beam splitting prism array 110.
In other alternative examples, the number of splitting prism layers of each splitting prism module in the splitting prism array 110, except for the first splitting prism module, may be determined according to the number of times that light passes through the first two splitting prism modules before being reflected by the first splitting prism module.
In other alternative examples, for each of the other prism modules in the prism array 110 except for the first prism module in the light propagation direction, the number of layers of the prism may be determined according to the number of times the light transmits one or some of the prism modules previously specified before being reflected by the light, for example, along the direction in which the light travels, for the third prism module in the prism array 110, the number of layers of the prisms may be determined according to the number of times the light passes through the first prism module before being reflected by the third prism module, the number of times that the light rays transmit through the second beam splitting prism module is not considered, and the rest beam splitting prism modules in the beam splitting prism array 110 are similar to each other.
In the above embodiments, by specifying the position and the number of the beam splitter prism modules through which light is transmitted when determining the number of layers of the beam splitter prism modules according to the number of times the light is transmitted through the beam splitter prism modules, the complexity of layering, stacking, and gluing the beam splitter prism modules in the beam splitter prism array 110 can be simplified.
The invention also provides head-mounted equipment which comprises a lens manufactured by the layered and superposed array optical waveguide in any embodiment. The layered stacked array optical waveguide shown in fig. 1 to 5 is applied to a lens of a head-mounted device. Taking the layered and superimposed array optical waveguide shown in fig. 1 to 5 as an example of applying to a right eyeglass, the light coupling area of the optical waveguide 100 may be located at a position of a right temple of a human body, and is configured to receive light carrying image information sent by an optical machine; the light coupling-out region of the optical waveguide 100 may be located at the right eye, and is used for allowing the light carrying the image information reflected by the optical waveguide 100 to enter the human eye, so as to form a virtual image on the human eye.
The layered and superimposed array optical waveguide shown in fig. 1 to 5 is applied to the left eyeglass, the light coupling-in region of the optical waveguide 100 may be located at the left temple of the human body, and the light coupling-out region of the optical waveguide 100 may be located at the left eye, and the principle of applying the layered and superimposed array optical waveguide shown in fig. 1 to 5 to the left eyeglass is the same as the principle of applying the layered and superimposed array optical waveguide to the right eyeglass, and therefore, the description thereof is omitted.
Optionally, the head-mounted device may be augmented reality glasses, or may also be an augmented reality helmet. Augmented reality glasses and augmented reality helmets can be applied to the medical field, the commercial activity and the movie field, etc.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A layered array optical waveguide is characterized in that a light splitting prism array is arranged in a light coupling-out area of the optical waveguide and comprises at least two light splitting prism modules, and light splitting surfaces of the light splitting prism modules are parallel and arranged at a certain interval and form a certain inclination angle with the optical waveguide;
each beam splitter prism module in the beam splitter prism array comprises at least one layer of beam splitter prism, the beam splitter prisms in the beam splitter prism module are overlapped and glued, the beam splitting surfaces of the beam splitter prisms are connected to form the beam splitting surface of the beam splitter prism module, and the beam splitting surfaces of the beam splitter prisms are plated with the reflectivity of a beam splitting film layer, so that the power of light reflected by the beam splitter prisms in the same beam splitter prism module is consistent.
2. The stacked layered array optical waveguide of claim 1, wherein for each of the beam splitting prism modules in the beam splitting prism array, the number of beam splitting prism layers is determined based on the number of times that light rays are transmitted through the other beam splitting prism modules in the beam splitting prism array before being reflected thereby.
3. The laminated stacked array optical waveguide of claim 2, wherein a first beam splitter prism module in the beam splitter prism array along the propagation direction of light comprises a layer of beam splitter prisms, and a beam splitter film layer coated on the beam splitting surface of the layer of beam splitter prisms has a reflectivity.
4. The stacked layered array optical waveguide of claim 3, wherein each of the splitting prism modules of the splitting prism array except the first splitting prism module along the light propagation direction comprises at least two layers of splitting prisms, and the reflectivity of the splitting film layers coated on the splitting surfaces of at least two layers of splitting prisms in each layer of splitting prisms is different.
5. The layered stack array optical waveguide of claim 4, wherein, for each of the other prismatic splitting modules in the prismatic splitting array except the first prismatic splitting module along the light propagation direction, the number of prismatic splitting layers is determined according to the number of times that the light is transmitted through the previous prismatic splitting module before being reflected by the prismatic splitting module.
6. The stacked layered array optical waveguide of claim 4, wherein the splitting surface of each of the beam splitters in each of the beam splitter prism modules in the beam splitter prism array except the first beam splitter prism module is coated with a beam splitting film layer to reflect the power of the light, which is determined according to the reflectivity of the beam splitting film layer, the number of times the light passes through the other beam splitter prism modules, and the transmittance of the other beam splitter prism modules.
7. The layered stack array optical waveguide of any one of claims 3 to 6, wherein the thickness of each layer of the beam splitter prisms in each of the beam splitter prism modules except the first beam splitter prism module in the beam propagation direction of the beam splitter prism array is determined according to the thickness of the optical waveguide, the material of the optical waveguide, the inclination angle of the beam splitting surfaces of the beam splitter prism modules, and the pitch of the beam splitting surfaces of the beam splitter prism modules.
8. A head-mounted apparatus comprising a lens made of the layered stacked array optical waveguide according to any one of claims 1 to 7.
9. The head-mounted device of claim 8, wherein the head-mounted device is augmented reality glasses.
10. The head-mounted device of claim 8, wherein the head-mounted device is an augmented reality helmet.
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