CN212160230U - Augmented reality display optical device, system, glasses and HUD display system - Google Patents

Abstract

The application provides an augmented reality shows optical device, this augmented reality shows optical device includes the stratum basale and receives the optics reflecting layer a little, and the stratum basale includes first surface and the second surface that backs on the back with the first surface, and the stratum basale transmits ambient light, receives the optics reflecting layer a little and sets up in the first surface of stratum basale, receives the optics reflecting layer a little and is configured as the light reflection that will be in the virtual image of predetermined narrowband wavelength section. Simultaneously, this application embodiment still provides augmented reality display system, augmented reality display glasses and augmented reality HUD display system who has this augmented reality display optics. The augmented reality display optical device utilizes the characteristics that the micro-nano optical reflecting layer has extremely high reflectivity to image light at a preset narrow wavelength and extremely high transmittance to environment light, so that high brightness and high transmittance of a display system to a light source at the preset narrow wavelength are realized at low cost and low power consumption.

Description

Augmented reality display optical device, system, glasses and HUD display system

Technical Field

The application relates to the technical field of augmented reality display, in particular to an augmented reality display optical device, system, glasses and HUD display system.

Background

The augmented reality display technology is a new technology for seamlessly integrating real world information and virtual world information, and is characterized in that entity information which is difficult to experience in a certain time space range of the real world originally is overlapped after simulation through scientific technologies such as computers, virtual information is applied to the real world and is perceived by human senses, so that the sense experience beyond reality is achieved, and a real environment and a virtual object are overlapped to the same picture or space in real time. The technology not only shows real world information, but also displays virtual information at the same time, and the two kinds of information are mutually supplemented and superposed. The existing augmented reality display system generally comprises an optical engine and an optical combiner, wherein the optical combiner reflects an image of the optical engine to enter human eyes and keeps a certain transmittance for ambient light, and the existing augmented reality display system cannot reflect the image and transmit the ambient light at high performance under the condition of low cost, so that the existing low-cost AR display system cannot realize high imaging brightness.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide an augmented reality display optical device, system, glasses and HUD display system to improve the above-mentioned problem. The present application achieves the above object by the following technical solutions.

In a first aspect, the application provides an augmented reality display optical device, which includes a substrate layer and a micro-nano optical reflection layer, wherein the substrate layer includes a first surface and a second surface opposite to the first surface, the substrate layer transmits ambient light, the micro-nano optical reflection layer is disposed on the first surface of the substrate layer, and the micro-nano optical reflection layer is configured to reflect light of a virtual image in a predetermined narrow band wavelength band.

In one embodiment, the micro-nano optical reflection layer comprises an intermediate layer and a nano grating layer, the intermediate layer is arranged on the first surface of the substrate layer, and the nano grating layer is arranged on one side of the intermediate layer far away from the first surface.

In one embodiment, the nano-grating layer is composed of a plurality of micro-nano grating structures arranged in an array, and the refractive index of each micro-nano grating structure is greater than 1.6.

In one embodiment, the grating period of the nanograting layer is from 200nm to 400 nm.

In one embodiment, the duty ratio of the nano-grating layer is 0.1-0.9.

In one embodiment, the nanograting layer is prepared by: and forming a nano grating layer on the intermediate layer by using resin as a raw material in an imprinting mode.

In one embodiment, the refractive index of the intermediate layer is greater than 1.6.

In a second aspect, the present application provides an augmented reality display system comprising an image projection arrangement and augmented reality display optics as above; the image projection device is used for emitting image light in a preset narrow-band wavelength band to the augmented reality display optical device; the augmented reality display optics are used to transmit ambient light; the augmented reality display optics are also used to reflect image light in a predetermined narrow band wavelength band for imaging.

In a third aspect, the present application provides augmented reality display glasses, where the augmented reality display glasses include a frame, lenses, and an augmented reality display system, the frame includes a frame and a frame leg support that are connected to each other, the lenses are disposed in the frame, and an image projection device is disposed in the frame leg support; the augmented reality display optics are attached to the inner surface of the lens, or the lens is used as a substrate layer of the augmented reality display optics.

In a fourth aspect, the present application provides an augmented reality HUD display system comprising a windshield and an augmented reality display system, wherein the augmented reality display optics are attached to an inner surface of the windshield, or the windshield is used as a substrate layer of the augmented reality display optics.

In a fifth aspect, the present application provides an augmented reality HUD display system, including independent HUD screen and augmented reality display system, its characterized in that, the augmented reality display optics is attached in independent HUD screen internal surface, or independent HUD screen is as augmented reality display optics's stratum basale.

Compared with the prior art, the augmented reality display optical device, the optical system, the glasses and the HUD display system provided by the application utilize the characteristics that the micro-nano optical reflecting layer has extremely high reflectivity to image light at a preset narrow wavelength and extremely high transmittance to ambient light, so that high brightness and high transmittance of the display system to the image light at the preset narrow wavelength are realized at low cost and low power consumption.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, 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 structural diagram of an augmented reality display optical device provided in a first embodiment of the present application.

Fig. 2 is a schematic diagram of the reflectivity and the refractive index of the augmented reality display optical device provided in the first embodiment of the present application, which are measured through experiments.

Fig. 3 is a schematic structural diagram of an implementation manner of a micro-nano optical reflective layer in an augmented reality display optical device according to a first embodiment of the present application.

Fig. 4 is a schematic structural diagram of an augmented reality display system according to a second embodiment of the present application.

Fig. 5 is a schematic structural diagram of augmented reality display glasses according to a third embodiment of the present application at a first viewing angle.

Fig. 6 is a schematic structural diagram of augmented reality display glasses provided in a third embodiment of the present application at a second viewing angle.

Fig. 7 is a schematic structural diagram of an augmented reality HUD display system provided in a fourth embodiment of the present application at a first viewing angle.

Fig. 8 is a schematic structural diagram of an augmented reality HUD display system provided in a fourth embodiment of the present application under a second viewing angle.

Fig. 9 is a schematic structural diagram of another augmented reality HUD display system provided in the fifth embodiment of the present application under a first viewing angle.

Fig. 10 is a schematic structural diagram of another augmented reality HUD display system provided in the fifth embodiment of the present application under a second viewing angle.

Detailed Description

To facilitate an understanding of the present application, embodiments of the present application will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. The embodiments of the present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the examples of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In the field of augmented reality display technology, from the aspect of light sources, there are mainly TFT-LCD/AM-OLED (TFT-LCD: thin film transistor liquid crystal display; AM-OLED: active matrix organic light emitting diode or active matrix organic light emitting diode) display screens based on conventional display panels, LED (LED: light emitting diode)/laser light source projection technology based on DLP (DLP: digital light processing) and 3LCD (3 LCD: light splitting light emitted from a light source into three colors (three primary colors of light) of R (red), G (green), B (blue)), light source technology based on LCOS (LCOS: liquid crystal silicon attachment), and laser scanning schemes based on MEMS (MEMS: micro electro mechanical systems) systems. From the optical combiner aspect, there are mainly a Birdbath (a curved mirror), a free-form surface, a geometric optical waveguide (also called an array optical waveguide), and a diffractive optical waveguide technology (including a surface relief grating and a holographic grating). The Birdbath, the free-form surface and the array optical waveguide are all based on the technology of geometric optics. The Birdbath and the free-form surface technology realize the function of optical combination through directional reflection of light rays and the semi-transparent and semi-reflective coating on the surface, the production cost of the related technology is low, and a large field angle can be realized. But since such technology is difficult to implement on thin sheet lenses, products based on this technology are often difficult to have the lightweight form of ordinary eyeglasses. And because the semi-transparent semi-reflective film layer exists, the light of the surrounding environment can be influenced to a certain extent, and the observation of the user on the surrounding environment cannot be guaranteed not to be influenced. The array optical waveguide technology is to make the reflecting surface of the free curved surface into a multilayer reflecting array film layer to reduce the volume of a product, but the process difficulty is extremely high, and the cost is always high or not small.

At present, there are also AR glasses based on a diffraction waveguide technology in the market, the diffraction waveguide technology is based on micro-nano optics, and the diffraction waveguide mostly adopts a grating with a surface relief structure or a holographic grating. For the surface relief grating, although the traditional rectangular grating has mature processing technology and good mass production, the problem of light efficiency utilization rate is brought. For the holographic volume grating, due to the limitation of materials and structures, the refractive index modulation which can be realized is relatively limited, so that the holographic volume grating still lags behind the surface relief grating in the visual angle, the optical efficiency and the definition, and the preparation process also has the problems of high cost and difficult mass production. In addition, the optical combiner based on the diffraction optical technology is easy to cause dispersion phenomenon due to high selectivity of the optical combiner to wavelength diffraction angles, has extremely high requirements on process precision, and further causes the increase of the technical cost. Therefore, AR glasses based on the diffractive optical waveguide technology are expensive. AR products with low cost, low power consumption, miniaturization, high imaging brightness, and high light transmittance are the main pursuit direction of future technologies.

Therefore, through long-term research, the inventors provide an augmented reality display optical device, an optical system, glasses, and a HUD display system based on low power consumption, miniaturization, and low cost, high brightness, and high light transmittance.

First embodiment

Referring to fig. 1, an embodiment of the present application provides an augmented reality display optical device 10, where the augmented reality display optical device 10 includes a substrate layer 200 and a micro-nano optical reflective layer 100. The substrate layer 200 is transmissive to ambient light, the substrate layer 200 includes a first surface 210 and a second surface 220 opposite to the first surface 210, the micro-nano optical reflective layer 100 is disposed on the first surface 210, and the micro-nano optical reflective layer 100 is configured to reflect image light in a predetermined narrow band wavelength band. Here, the predetermined narrow band wavelength band means: predetermined narrow width wavelength bands, such as: the predetermined narrow band wavelength band may be a specific monochromatic light wavelength band, wherein the predetermined narrow band wavelength band may be any one of a blue light wavelength band (450nm-480nm), a green light wavelength band (500nm-560nm), and a red light wavelength band (605nm-700nm), and in this embodiment, the predetermined narrow band wavelength band refers to light having a wavelength of 450nm-480 nm.

The substrate layer 200 may be transparent to ambient light and may be attached to other display devices as an attachment layer. In some embodiments, the substrate layer 200 may be planar in configuration or may be free-form. In this embodiment, the first surface 210 is a free-form surface, the second surface 220 can be mounted and attached to various display systems, such as lenses of AR glasses, windshields of HUD devices, and independent HUD screens, and the substrate layer 200 can also be directly used as all or a part of the lenses of AR glasses, windshields of HUD devices, and independent HUD screens.

The intermediate layer 120 may provide a foundation for the nano-grating layer 110, and the intermediate layer 120 may be disposed on the first surface 210, in this embodiment, the refractive index of the intermediate layer 120 may be greater than 1.6, and the refractive index of the intermediate layer 120 is greater than 1.6, when the ambient light is incident to the intermediate layer 120 from the nano-grating layer 110 side, total reflection may not occur no matter what angle the ambient light is incident from the air (refractive index is 1.0, optically thinner medium) to the intermediate layer 120 (refractive index is 1.6, optically denser medium), so as to ensure that the ambient light incident to the micro-nano optical reflective layer 100 from the nano-grating layer 110 side is not reflected, thereby improving the imaging effect. In addition, ambient light incident from the base layer 200 to the micro-nano optical reflective layer 100 (the same principle as that of the incident of air to the intermediate layer 120) is not totally reflected, and thus transmittance of the ambient light is improved.

The micro-nano optical reflection layer 100 has an extremely high reflectivity for image light of a predetermined narrow band wavelength band. In one embodiment, the micro-nano optical reflective layer 100 includes an intermediate layer 120 and a nano grating layer 110, the intermediate layer 120 is disposed on the first surface 210 of the substrate layer 200, and the nano grating layer 110 is disposed on a surface of the intermediate layer 120 on a side away from the first surface 210. The micro-nano optical reflection layer 100 can receive image light emitted by external equipment (such as a laser display optical machine), reflect the image light, has a certain amplification imaging function, reflects the image light, and enters a rear optical system.

The nanometer grating has extremely high reflectivity to light in a narrow band wavelength band and extremely high transmissivity to other wavelength bands, can reflect image light highly, has extremely high transmissivity to environment light in other wavelength bands, and realizes selective wavelength imaging. In some embodiments, the nanograting layer 110 may be formed by a plurality of micro-nano grating structures arranged in an array, and a certain gap exists between each pair of nanogratings, so that when the ambient light enters the nanograting layer 110 from the intermediate layer 120, the ambient light may pass through the gaps and enter human eyes or a rear image receiving device. When image light is incident to the nano-grating layer 110 from the side of the nano-grating layer 110 far away from the intermediate layer 120, each nano-grating reflects local image light, all the local image light is spliced into whole image light, and the whole image light enters human eyes or rear image receiving equipment, so that the human eyes or the rear image receiving equipment can receive the whole image light and can also receive ambient light.

In some embodiments, the refractive index of each micro-nano grating structure may be greater than or equal to 1.6, and may be the same as or approximately equal to the refractive index of the intermediate layer, so that ambient light from the intermediate layer 120 to the nano-grating layer 110 may not be reflected, but may directly pass through the nano-grating layer 110. Meanwhile, the refractive index of the micro-nano grating structure is larger than that of air, and when image light is incident on the micro-nano grating structure and is diffracted, the diffracted light can be totally reflected.

In some embodiments, the grating period of nanograting layer 110 may be selected from 200nm to 400nm, and the grating period refers to the length from one refractive index change point to an adjacent refractive index change point. Thereby providing nanograting layer 110 with extremely high reflectivity at a particular monochromatic wavelength of light, and extremely high transmission of ambient light.

In some embodiments, the duty ratio of the nanograting layer 110 may be 0.1 to 0.9, and the duty ratio is adjusted to 0.1 to 0.9, so that on one hand, the reflectivity of image light at a predetermined narrow-band wavelength is improved, and on the other hand, the distribution position of each nanograting on the intermediate layer 120 is adjusted to improve the transmittance of the image light to the ambient light. In some embodiments, the height of the grating may be selected to be in a range of 10nm to 500nm, and the imaging distance of each nanograting layer is adjusted by adjusting the height of the nanograting layer 110, so as to ensure the imaging effect on image light within a certain range.

The refractive index of the nano-grating layer 110 is adjusted to be larger than 1.6, the period is 200-400 nm, the duty ratio is 0.1-0.9, and the height is 10-500 nm. Through experimental determination, as shown in fig. 2, the abscissa in the figure is the wavelength of light, the ordinate is transmittance/reflectance, and the nanograting layer 110 (with the refractive index greater than 1.6, the period of 200nm to 400nm, the duty ratio of 0.1 to 0.9, and the height of 10nm to 500nm) with the structure achieves a reflectance of more than 60% at specific wavelengths (such as 455nm of blue-polar light, 525nm of green laser, and 632nm of red laser), particularly realizes an extremely high reflectance at the wavelength of 525nm, which is about 97%, and simultaneously ensures that the half-extreme width is within 15nm, and has good transmittance for ambient light and an extremely narrow bandwidth (5 nm).

The nanograting layer 110 includes a plurality of nanograsters arranged in an array, for example, in a rectangular array, to form the nanograting layer 110. In some embodiments, referring to fig. 3, nanograting layers 110 may be arranged in rows and columns that are perpendicular to each other in a rectangular array. Thus, the amplified image light formed by each nano-grating layer 110 can be spliced into a complete image without overlapping, so that the distances between the nano-grating layers 110 in each row can be equal, and the distances between the nano-grating layers 110 in each column can be equal.

In addition to a rectangular array arrangement, nanograting layer 110 may be arranged in other ways. For example, the nanograms may also be arranged in an annular array to form nanograting layer 110. By proper arrangement, the interval between each nanometer grating is the same, so that the complete image light can be formed.

In some embodiments, nanograting layer 110 may be formed on intermediate layer 120 by imprinting using a resin as a raw material. The resin has cheap raw materials, light weight and good light transmission, and ensures excellent transmittance to ambient light. The nanometer grating layer 110 is formed by impressing, namely, the nanometer grating is overprinted on the middle layer 120, the nanometer grating layer 110 is formed in an impressing mode, the interval between the nanometer gratings can be ensured within a preset range, the extremely high reflectivity of the nanometer grating layer 110 to the preset narrow-band image light is improved, meanwhile, the extremely high transmissivity to the environment light is achieved, the impressing process is simple, the mass production is easy, and therefore the cost is reduced.

In summary, in the augmented reality display optical device 10 provided in the embodiment of the present application, the nano-grating layer 110 is arranged on the intermediate layer 120 by the array arrangement, so that the image light reflected by each nano-grating can be spliced into a complete image. The refractive index of the nano-grating layer 110 is set to be greater than 1.6, so that the reflectivity of several numbers of image light at a preset narrow wavelength is realized; the period is selected to be 200 nm-400 nm, so that the image light has extremely high reflectivity and extremely high transmittance to the ambient light; the preparation is carried out by adopting a hot stamping mode, so that the low cost is realized.

Second embodiment

Referring to fig. 4, an augmented reality display system 20 is further provided in an embodiment of the present application, where the augmented reality display system 20 includes an image projection apparatus 300 and the augmented reality display optical device 10 in the first embodiment, the image projection apparatus 300 is configured to emit image light in a predetermined narrow band wavelength band to the augmented reality display optical device 10, and the augmented reality display optical device 10 is configured to transmit ambient light and reflect the image light in the predetermined narrow band wavelength band for imaging. The image projection apparatus 300 may be a laser display optical machine, and the image light emitted by the laser display optical machine may be a laser image with three primary colors, so as to achieve a very high reflectivity and improve an imaging effect.

For convenience of explanation, referring to fig. 4 again, the solid line in fig. 4 is the optical path of the image light, and the dotted line is the optical path of the ambient light. Since the image projection apparatus 300 may be a laser display optical machine, the laser light source has the advantages of high brightness, small divergence angle, wide color gamut, high energy efficiency, and the like, and thus, a higher luminance may be ensured under the condition of lower power consumption. In addition, this display system utilizes the augmented reality display optics 10 of the first embodiment, and has high light reflectance to the image projection apparatus and high transmittance to ambient light, so that it is possible to ensure a high-brightness imaging effect without affecting the user's observation of ambient light.

Third embodiment

Referring to fig. 5, the embodiment of the present application provides an augmented reality display glasses 30, where the augmented reality display glasses 30 include a frame 500, a lens 400, and the augmented reality display system 20 in the second embodiment. The frame 500 includes a frame 520 and a temple bracket 510 connected to each other, the lens 400 is disposed in the frame 520, and the image projection apparatus 300 is disposed in the temple bracket 510; the augmented reality display optics 10 are attached to the inner surface of the lens 400.

Referring to fig. 5 and 6, the frame 500 provides a base for mounting the lens 400 and the augmented reality display system 10 b. In some embodiments, the frame 500 includes a frame 520 and a temple support 510 connected to each other, the frame 520 may have a ring structure, the frame 520 has two frames 520, the two frames 520 are connected to each other, and the inside of the frame 520 having the ring structure is used for mounting the lens 400. The temple brackets 510 are rotatably provided to the lens frames 510, and similarly, the temple brackets 510 have two, and the two temple brackets 510 are respectively provided to the two lens frames 520.

Referring again to fig. 5, in some embodiments, the lens 400 and the frame 520 may have the same configuration to satisfy the requirement of the lens 400 and the frame 520. Similarly, there may be two lenses 400, and the two lenses 400 are respectively disposed on the two frames 520. The lens 400 may be an optical device having a curved surface structure made of an optical material such as glass or resin, and has excellent transmittance to ambient light.

In particular, the augmented reality display optics 10 are attached to the inner surface of the lens 400, i.e., the surface of the lens 400 facing the temple support 510. In one embodiment, the surface of the substrate layer 200 of the augmented reality display optical device 10 away from the micro-nano optical reflective layer 100 is attached to the inner surface of the lens 400.

In some embodiments, the substrate layer 200 of the augmented reality display optics 10 may also be directly attached to the frame 520 as the lens 400, or the substrate layer 200 may be embedded in the lens 400 as only a portion of the lens 400.

Similarly, in order to make the augmented reality display glasses 30 have better display effect, the augmented reality display systems 20 may also include two augmented reality display optical devices 10 of the two augmented reality display systems 20 respectively disposed on the two lenses 400, and the two image projection devices 300 respectively disposed on the two frame brackets 510. And by reasonably adjusting the projection angle of the image projection apparatus 300, the augmented reality display optical device 10 is positioned on the optical path of the image light, and the image light is completely projected on the augmented reality display optical device 10.

In some other embodiments, the image projection apparatus 300 may be further disposed on the frame 520, so that the augmented reality display optical device 10 is located on the optical path of the image light, and the augmented reality optical device 10a has a very high reflectance with respect to the image light.

Fourth embodiment

Referring to fig. 7 and 8, the embodiment of the present application further provides an augmented reality HUD display system 40, where the augmented reality HUD display system 40 includes a windshield 500 and the augmented reality display system 20 in the second embodiment.

The windshield 500 may be a windshield of an automobile, or may be a windshield of some other device or building. The augmented reality display optical device 10 is attached to the inner surface of the windshield 500, the image projection apparatus 300 in the augmented reality display system 20 may be disposed on an a pillar in a vehicle or other components on which the image projection apparatus 300 may be mounted, and the micro-nano optical reflective layer 100 is located on the optical path of the image projection apparatus 300.

In some embodiments, as shown in fig. 7, the augmented reality display optics 10 may be attached to only a portion of the windshield 500, although the augmented reality display optics 10 may also be attached to the entire windshield 500. In particular, the augmented reality display optics 10 are attached to the inner surface of the windshield 500, it being understood that the inner surface of the windshield 500 is even the side of the windshield 500 that is located in the vehicle (here, the vehicle is taken as an example, and the same embodiment is provided in some other devices). In one embodiment, the surface of the substrate layer 200 of the augmented reality display optical device 10 away from the micro-nano optical reflective layer 100 is attached to the inner surface of the windshield 400.

In some embodiments, the substrate layer 200 of the augmented reality display optics 10 may also be mounted directly as the windshield 500, directly to the frame of a vehicle frame or other device to which the windshield 500 is mounted, and the substrate layer 200 may also be embedded in the windshield 500 as only a portion of the windshield 500. In some embodiments, the image projection apparatus 300 is disposed on one side of the inner surface of the windshield 400, and specifically, may be disposed on the a-pillar of the automobile and other fixed devices, for example, such that the augmented reality display optics 10 is located on the optical path of the image light emitted by the image projection apparatus 300.

Fifth embodiment

Referring to fig. 9 and 10 together, the embodiment of the present application further provides an augmented reality HUD display system 50, the augmented reality HUD display system 50 includes a separate HUD screen 600 and the augmented reality display system 20 of the second embodiment, and the augmented reality display optics 10 is attached to the inner surface of the separate HUD screen 600.

The independent HUD screen 600 may be configured to be carried independently, and may be fixed to a glass of an automobile or the like by means of pasting or the like as a display screen. For example: the independent HUD screen 600 may be attached to the inner surface of the front windshield of the vehicle and positioned substantially directly in front of the steering wheel to serve as a heads-up display for the driver and passengers to view.

Specifically, the augmented reality display optics 10 is attached to the inner surface of the independent HUD screen, i.e., on the side of the independent HUD screen near the rear optical system (i.e., on the side of the independent HUD screen near the driver or passenger 600 when used in the automotive field). As an embodiment, the surface of the substrate layer 200 of the augmented reality display optics 10 away from the micro-nano optical reflective layer 100 is attached to the inner surface of the independent HUD screen 600.

In some embodiments, the base layer 200 of the augmented reality display optics 10 may also be directly embedded in the independent HUD screen 600 as a stand-alone HUD screen 600, and further the base layer 200 may also be embedded in the independent HUD screen 600 as only a portion of the independent HUD screen 600. In some embodiments, the image projection device 300 is disposed on one side of the inner surface of the self-contained HUD screen, and specifically, may be disposed on the a-pillar of an automobile or some other fixed device, for example, such that the augmented reality display optics 10 is disposed on the optical path of the image light emitted by the image projection device 300.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (11)

1. An augmented reality display optic, comprising:

a base layer comprising a first surface and a second surface opposite the first surface, the base layer transmitting ambient light; and

a micro-nano optical reflective layer disposed on the first surface of the base layer, the micro-nano optical reflective layer configured to reflect image light at a predetermined narrow band wavelength band.

2. The augmented reality display optical device of claim 1, wherein the micro-nano optical reflective layer comprises an intermediate layer and a nano-grating layer, the intermediate layer is disposed on the first surface of the substrate layer, and the nano-grating layer is disposed on a side of the intermediate layer away from the first surface.

3. The augmented reality display optical device of claim 2, wherein the nano-grating layer is formed by a plurality of micro-nano grating structures arranged in an array, and a refractive index of each micro-nano grating structure is greater than 1.6.

4. The augmented reality display optic of claim 3, wherein the nanograting layer has a grating period of 200nm to 400 nm.

5. The augmented reality display optic of claim 3, wherein the duty cycle of the nanograting layer is 0.1 to 0.9.

6. The augmented reality display optic of claim 3, wherein the nanograting layer is prepared by: and forming the nano grating layer on the intermediate layer by using resin as a raw material in an imprinting manner.

7. Augmented reality display optics according to claim 3, characterised in that the refractive index of the intermediate layer is greater than 1.6.

8. An augmented reality display system, comprising:

an image projection arrangement and augmented reality display optics as claimed in any one of claims 1 to 7;

the image projection device is used for emitting image light in a preset narrow-band wavelength band to the augmented reality display optical device;

the augmented reality display optics are to transmit ambient light;

the augmented reality display optics are further configured to reflect image light of the predetermined narrowband wavelength band for imaging.

9. Augmented reality display glasses comprising a frame, lenses and an augmented reality display system according to claim 8, wherein the frame comprises a frame and a temple support connected to each other, the lenses being arranged in the frame, the image projection means being arranged in the temple support; the augmented reality display optical device is attached to the inner surface of the lens;

or the lens acts as a base layer of the augmented reality display optics.

10. An augmented reality display (HUD) display system comprising a windshield and the augmented reality display system of claim 8, wherein the augmented reality display optics are affixed to the inner surface of the windshield;

or the windshield serves as a substrate layer of the augmented reality display optics.

11. An augmented reality display (HUD) display system comprising a self-contained HUD screen and the augmented reality display system of claim 8, wherein the augmented reality display optics are affixed to the interior surface of the self-contained HUD screen;

or the independent HUD screen acts as a substrate layer for the augmented reality display optics.

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