CN215641928U - Waveguide assembly, AR lens and AR glasses - Google Patents
Waveguide assembly, AR lens and AR glasses Download PDFInfo
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- CN215641928U CN215641928U CN202122282006.0U CN202122282006U CN215641928U CN 215641928 U CN215641928 U CN 215641928U CN 202122282006 U CN202122282006 U CN 202122282006U CN 215641928 U CN215641928 U CN 215641928U
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Abstract
The embodiment of the application provides a waveguide assembly, AR lens and AR glasses, waveguide assembly includes: a waveguide substrate, a first surface of the waveguide substrate including a first region and a second region; a grating disposed in the first region; and the anti-reflection structure is arranged in the second area and is configured to improve the transmittance of the waveguide assembly to the light rays incident to the second area and reduce the reflectivity of the waveguide assembly to the light rays. In the waveguide component provided by the embodiment of the application, the anti-reflection structure is arranged on the waveguide substrate, and the anti-reflection structure and the grating are positioned on the same surface of the waveguide substrate, so that the anti-reflection structure can effectively reduce the interference of light rays behind a user to human eyes through reflection, and the interference of the light rays in the external environment to the human eyes is reduced.
Description
Technical Field
The application relates to the technical field of wearable equipment, in particular to waveguide assembly, AR lens and AR glasses.
Background
With the rapid development of AR (Augmented Reality) technology, wearable devices such as AR glasses are increasingly used. After the user wears the AR glasses, the combination of the virtual scene and the real scene can be experienced.
Optical waveguides are considered an optional optical solution for consumer-grade AR glasses due to their thinness and high transmission characteristics of external light. The waveguide structure is based on a thin, transparent glass substrate (typically on the order of a few millimeters or sub-millimeters in thickness) that can present both virtual and real images to the user.
Currently, the appearance of AR glasses is continuously designed and developed, and is closer to the appearance of common traditional glasses. When the AR glasses do not have the helmet-type design and can shelter from external environment light, the user wears the in-process of AR glasses, and the eyes of people often can receive the interference of external environment light.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a waveguide assembly, an AR lens and AR glasses, which can reduce the interference of external ambient light to human eyes.
An embodiment of the present application provides a waveguide assembly, including:
a waveguide substrate, a first surface of the waveguide substrate comprising a first region and a second region;
a grating disposed in the first region; and
an anti-reflection structure disposed in the second region, the anti-reflection structure configured to increase a transmittance of the waveguide assembly for light rays incident to the second region and decrease a reflectance of the waveguide assembly for the light rays.
In some embodiments, the anti-reflection structure includes a plurality of microstructures periodically arranged along the second region, the microstructures have an arrangement period of 200nm to 450nm, and a dimension of the microstructures in a direction perpendicular to the second region is 200nm to 700 nm.
In some embodiments, the microstructures are one of pyramidal cylindrical, bullet-shaped, truncated cone-shaped, and parabolic in shape.
In some embodiments, the microstructures are formed in the second region by nanoimprinting.
In some embodiments, the antireflective structure comprises a first antireflective film.
In some embodiments, the refractive index of the first antireflection film satisfies the following relationship:
wherein n1 is the refractive index of the first antireflection film, n0 is the refractive index of air, n2 is the refractive index of the waveguide substrate, and n2> n1> n 0.
In some embodiments, a second antireflection film is further disposed between the grating and the first region.
In some embodiments, the first antireflective film is integrally formed with the second antireflective film.
In some embodiments, the grating is formed in the first region by means of nanoimprinting.
In some embodiments, the first region is contiguous with the second region.
In some embodiments, the second region is circumferentially disposed about the first region.
In some embodiments, a second surface of the waveguide substrate is further provided with a third antireflection film, and the second surface is arranged opposite to the first surface.
In some embodiments, the waveguide assembly further comprises a first protective glass disposed on the first surface side and a second protective glass disposed on the second surface side spaced apart from the waveguide substrate.
In some embodiments, a fourth antireflection film is disposed on a side of the first protective glass facing away from the waveguide substrate, and a fifth antireflection film is disposed on a side of the second protective glass facing away from the waveguide substrate.
Embodiments of the present application further provide a waveguide assembly, including:
a waveguide substrate;
the antireflection film is arranged on one surface of the waveguide substrate; and
the grating is arranged on the antireflection film;
the forward projection area of the antireflection film on the waveguide substrate is larger than that of the grating on the waveguide substrate, and the antireflection film is configured to improve the transmittance of the waveguide assembly to light incident on the antireflection film and reduce the reflectance of the waveguide assembly to the light.
Embodiments of the present application also provide an AR lens, including the waveguide assembly of any one of the above.
The embodiment of the present application further provides an AR glasses, including:
a spectacle frame;
a first AR lens mounted to the eyeglass frame, the first AR lens being the AR lens; and
a second AR lens mounted to the eyeglass frame, the second AR lens being the AR lens.
The embodiment of the present application further provides an AR glasses, including:
a spectacle frame;
a first AR lens mounted to the eyeglass frame, the first AR lens comprising the waveguide assembly of any of the above; and
a second AR lens mounted to the eyeglass frame, the second AR lens comprising the waveguide assembly of any of the above;
the anti-reflection structure of the waveguide assembly of the first AR lens is arranged at one end, far away from the second AR lens, of the first AR lens, and the anti-reflection structure of the waveguide assembly of the second AR lens is arranged at one end, far away from the first AR lens, of the second AR lens.
In the waveguide component provided by the embodiment of the application, the anti-reflection structure is arranged on the waveguide substrate, and the anti-reflection structure and the grating are positioned on the same surface of the waveguide substrate, so that the anti-reflection structure can effectively reduce the interference of light rays behind a user to human eyes through reflection, and the interference of the light rays in the external environment to the human eyes is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic view of a first structure of a waveguide assembly according to an embodiment of the present disclosure.
Fig. 2 is a schematic view of light propagation of the waveguide assembly of fig. 1.
Fig. 3 is a schematic plan view of a waveguide assembly according to an embodiment of the present application.
Fig. 4 is a second schematic plan view of a waveguide assembly provided in an embodiment of the present application.
Fig. 5 is a schematic diagram illustrating an arrangement of microstructures in a waveguide assembly according to an embodiment of the present disclosure.
Fig. 6 is a schematic diagram of a single microstructure in a waveguide assembly provided by an embodiment of the present application.
FIG. 7 is a schematic view of antireflection film.
Fig. 8 is a schematic diagram of a second structure of a waveguide assembly according to an embodiment of the present application.
Fig. 9 is a schematic view of a third structure of a waveguide assembly according to an embodiment of the present application.
Fig. 10 is a schematic diagram of a fourth structure of a waveguide assembly according to an embodiment of the present application.
Fig. 11 is a schematic view of light propagation through the waveguide assembly of fig. 10.
Fig. 12 is a schematic structural diagram of AR glasses according to an embodiment of the present application.
Fig. 13 is a schematic plan view of AR glasses according to an embodiment of the present application.
Fig. 14 is a schematic view of the arrangement of the grating and anti-reflection structures in the AR glasses of fig. 13.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Embodiments of the present application provide a waveguide assembly, which may be applied to wearable devices such as AR (Augmented Reality) glasses to implement transmission of light. After wearing the AR glasses, a user can observe an image formed by combining an actual scene and a virtual scene, so that the combination of virtual and reality is experienced.
Referring to fig. 1, fig. 1 is a schematic diagram of a first structure of a waveguide assembly 100 according to an embodiment of the present disclosure. The waveguide assembly 100 includes a waveguide substrate 10, a grating 20, and an anti-reflection structure 30.
The waveguide substrate 10 may be made of transparent glass. In practice, the thickness of the waveguide substrate may be 0.3mm to 1 mm. The waveguide substrate 10 has a first surface 11. In practical applications, the first surface 11 may be a plane or a curved surface. The first surface 11 comprises a first region 111 and a second region 112.
The grating 20 is arranged in this first region 111. Wherein the grating 20 allows light to be diffracted therein.
The anti-reflection structure 30 is disposed at the second region 112. That is, the antireflection structure 30 is provided on the same surface of the waveguide substrate 10 as the grating 20. Wherein the anti-reflection structure 30 is configured to increase the transmittance of the waveguide assembly 100 for light incident to the second region and to decrease the reflectance of the waveguide assembly 100 for the light. It will be appreciated that since the light has a constant energy, according to the law of conservation of energy, when the transmittance of the waveguide assembly 100 for a light increases, the reflectance for the same light necessarily decreases, so that both increasing the transmittance of the light and decreasing the reflectance for the light can be achieved simultaneously.
Referring also to fig. 2, fig. 2 is a schematic diagram illustrating light propagation of the waveguide assembly 100 shown in fig. 1. In practical application, after the user wears the AR glasses, the eye 200 is located on the side of the grating 20. When the external ambient light ray R is incident on the second region 112 of the waveguide substrate 10, refraction and reflection simultaneously occur in the second region 112, resulting in a refracted light ray R1 and a reflected light ray R2. The refracted ray R1 continues to be transmitted through the waveguide substrate 10 and finally through the waveguide assembly 100, so that the refracted ray R1 does not enter the human eye 200. The reflected light ray R2 can enter the human eye 200, so that the user can observe the image corresponding to the reflected light ray R2. After the waveguide assembly 100 that this application provided is applied to AR glasses, can reduce waveguide assembly 100 to light R's reflectivity, consequently can reduce reflected light R2's intensity, corresponding reinforcing refraction light R1's intensity to reduce the light volume of the external environment light that gets into people's eye 200 through the reflection.
When the waveguide assembly 100 is actually applied to the AR glasses, when a user uses the AR glasses, the edge area of the lens of the AR glasses may reflect external ambient light, for example, the edge area of the side where the grating is located on the lens may reflect light behind the user, so that light behind the user may enter human eyes through the edge area of the side where the grating is located on the lens. The light behind the user is an interference signal for the user to use the AR glasses, and may interfere with the picture viewed by human eyes. In the waveguide assembly 100 provided by the present application, since the anti-reflection structure 30 is disposed on the waveguide substrate 10, and the anti-reflection structure 30 and the grating 20 are located on the same surface of the waveguide substrate 10, the anti-reflection structure 30 can effectively reduce the interference of the light from the rear of the user to the human eyes through reflection, thereby reducing the interference of the light from the external environment to the human eyes.
It will be appreciated that in practical applications, the anti-reflection structure 30 may be disposed along the edge of the first surface 11, that is, the second region 112 is located at the edge of the first surface 11, which enables the waveguide assembly 100 to achieve better effects of improving transmittance and reducing reflectance of light behind the user.
In some embodiments, referring to fig. 3, fig. 3 is a first schematic plan view of a waveguide assembly 100 provided by an embodiment of the present application.
Wherein the first region 111 on the waveguide substrate 10 adjoins the second region 112. At this time, the grating 20 and the antireflection structure 30 are also adjacent. Therefore, no gap is left between the grating 20 and the anti-reflection structure 30, and external ambient light incident from a side of the grating 20 close to the anti-reflection structure 30 can be processed by the anti-reflection structure 30 to reduce the amount of light reflected into the human eye.
In some embodiments, referring to fig. 4, fig. 4 is a second schematic plan view of a waveguide assembly 100 provided by embodiments of the present application.
Wherein the second region 112 on the waveguide substrate 10 is surrounded at the periphery of the first region 111. That is, the second region 112 surrounds the outside of the first region 111. In the embodiment of the present application, the shapes of the first region 111 and the second region 112 are not limited. For example, the first region 111 may be a rectangular region as shown in fig. 4, and the periphery of the second region 112 may be rectangular as shown in fig. 4. Further, the first region 111 may have another shape such as a circle, an ellipse, a square, or the like, the periphery of the second region 112 may have a shape such as a circle, an ellipse, a square, or the like, and the shape of the first region 111 may be different from the shape of the second region 112.
It can be understood that the second region 112 is disposed around the periphery of the first region 111, and after the anti-reflection structure 30 is disposed in the second region 112, the range of action of the anti-reflection structure 30 can be increased, so that the reflectivity of the external ambient light on the waveguide assembly 100 can be reduced to a greater extent, thereby reducing the interference of the external ambient light with human eyes.
In some embodiments, the antireflective structure 30 in the waveguide assembly 100 may comprise a plurality of microstructures that are periodically arranged along the second region 112. Referring to fig. 5 and 6, fig. 5 is a schematic diagram illustrating an arrangement of microstructures in the waveguide assembly 100 according to the embodiment of the present disclosure, and fig. 6 is a schematic diagram illustrating a single microstructure in the waveguide assembly 100 according to the embodiment of the present disclosure.
The anti-reflection structure 30 includes a plurality of microstructures 31, and the plurality of microstructures 31 are periodically arranged along the second region 112, that is, periodically arranged along a direction parallel to the second region 112. The arrangement period D of the microstructures 31 is 200nm to 450 nm. Here, the arrangement period D may be understood as a distance between the same sides of two adjacent microstructures 31. The dimension H of the microstructure 31 in a direction perpendicular to the second region 112 is 200nm to 700 nm. Wherein dimension H can be understood as the height of the microstructure 31 in a direction perpendicular to the second region 112.
In the embodiment of the present application, the shape of the microstructure 31 may be a tapered column, as shown in fig. 6. In other embodiments, the shape of the microstructure 31 may be one of cylindrical, bullet-shaped, truncated cone-shaped, and parabolic. In practice, the microstructure 31 may be similar to the microstructure of a natural moth eye (moth eye).
In some embodiments, the plurality of microstructures 31 may be formed in the second region 112 of the waveguide substrate 10 by nanoimprinting. In practice, a plurality of microstructures 31 may be made on quartz glass by photolithographic techniques.
It will be appreciated that the dimensions of the microstructures 31 are of the nanometer scale and are sub-wavelength dimensional. The mechanism for improving the light transmittance of the sub-wavelength structure array is to remove the step change of the refractive index at the interface. When light interacts with the sub-wavelength dimension structure, the refractive index at the surface of the material is continuously changed along the depth direction of the sub-wavelength dimension structure, and the light wave cannot distinguish the microstructure, so that the microstructure is represented as if encountering a uniform medium. Sub-wavelength sized structures are regular in size and arrangement, so-called zero order diffraction gratings can be formed, in which case all the higher order diffracted light is evanescent and only the zero order diffracted light propagates. Therefore, such a structure can reduce a reflection phenomenon caused by a sharp change in refractive index, thereby reducing the reflectance of light and increasing the transmittance of light.
The average reflectivity of the light waves incident on the microstructures 31 is approximately linear with the angle of incidence. At normal incidence, ultra-low average reflectivities around 1% can be obtained over the spectral range of 400nm to 1000 nm. When the incident angle is 60 °, the average reflectance is still below 8%. When the arrangement period D and the height H of the microstructure 31 are adjusted, the desired bandwidth, high transmittance, low reflectance and angle-independent effect are exhibited, and the optimal anti-reflection performance is obtained.
In some embodiments, the anti-reflection structure 30 in the waveguide assembly 100 may include an anti-reflection film, which may be understood as a first anti-reflection film. The thickness of the first antireflection film may be 0.1 μm to 2 μm. The antireflection film may be referred to as an antireflection film, or the like. After the antireflection film is disposed in the second region 112 of the waveguide substrate 10, since the antireflection film has the functions of increasing the light transmittance and decreasing the light reflectance, the transmittance of the waveguide assembly 100 for the light incident on the second region 112 can be increased and the reflectance of the waveguide assembly 100 for the light can be decreased.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating antireflection of an antireflection film.
Suppose that the refractive index of the antireflection film is n1, n0 is the refractive index of the first dielectric layer with the refractive index smaller than n1, n2 is the refractive index of the second dielectric layer with the refractive index larger than n1, K1 is the interface between the antireflection film and the first dielectric layer, and K2 is the interface between the antireflection film and the second dielectric layer. When the light ray S enters the antireflection film from the first medium layer, the light ray S is reflected and refracted at the interface K1 at the same time to generate a reflected light ray S1 and a refracted light ray, and when the refracted light ray continues to be transmitted to the interface K2, the light ray S2 and the refracted light ray S3 are generated by reflection and refraction again.
Since half-wave loss exists in the reflected light when the light is transmitted from the optically thinner medium to the optically denser medium, the optical path difference between the reflected light S1 and the reflected light S2 has half a wavelength, and the two reflected light will generate destructive interference on the surface of the antireflection film, thereby reducing the overall reflected light intensity. Therefore, according to the law of conservation of energy, when the total energy of the light S is constant and the total reflected light intensity is reduced, the transmitted light intensity is increased. Therefore, the antireflection film can achieve an improvement in the transmittance of the waveguide assembly 100 to light and a reduction in the reflectance to light.
In some embodiments, the first antireflection film has a thickness of 1/4 the wavelength of the external ambient light incident on the second region 112. For example, the first antireflection film may have a thickness of 1/4 at a certain visible wavelength.
Because a single layer of antireflection film only has a strong antireflection effect on light with a single wavelength, and external ambient light is multicolor stray light at the same time and comprises light with multiple wavelengths, in order to improve the antireflection effect of the first antireflection film on the light with the multiple wavelengths, the first antireflection film can be formed by combining multiple layers of antireflection films with different thicknesses, and each layer of antireflection film is used for performing the antireflection effect on the light with the single wavelength. Therefore, the first antireflection film can have an antireflection effect on light rays with multiple wavelengths, so that the bandwidth of transmitted light is increased.
In some embodiments, the refractive index of the first antireflection film satisfies the following relationship:
wherein n1 is the refractive index of the first antireflection film, n0 is the refractive index of air, n2 is the refractive index of the waveguide substrate 10, and n2> n1> n 0. When the refractive index of the first antireflection film satisfies the relation, the first antireflection film can have the best effects of improving the light transmittance and reducing the light reflectivity.
In some embodiments, referring to fig. 8, fig. 8 is a schematic diagram of a second structure of the waveguide assembly 100 provided in the embodiments of the present application.
A second antireflection film 40 is further disposed between the grating 20 and the first region 111 of the waveguide substrate 10. The second antireflection film 40 can also improve the transmittance and reduce the reflectance of light, thereby further improving the transmittance and reducing the reflectance of light by the waveguide assembly 100.
In some embodiments, the first antireflective film of antireflective structure 30 is integrally formed with the second antireflective film 40. For example, the first antireflection film and the second antireflection film 40 may be integrally formed on the waveguide substrate 10 by plating, and the integrally formed manner can simplify the manufacturing process of the waveguide assembly 100.
In some embodiments, grating 20 may be formed in first region 111 by nanoimprinting, such as by nanoimprinting, on second antireflective film 40 in first region 111. In practical application, the second antireflection film 40 may be formed in the first region 111 by plating, and then the grating 20 may be formed on the second antireflection film 40 by nanoimprinting.
Referring to fig. 9, fig. 9 is a schematic diagram of a third structure of a waveguide assembly 100 according to an embodiment of the present application.
In the embodiment of the present application, the forward projection area of the antireflection film 50 on the waveguide substrate 10 is larger than the forward projection area of the grating 20 on the waveguide substrate 10. The antireflection film 50 is configured to increase the transmittance of the waveguide assembly 100 for light incident on the antireflection film 50 and decrease the reflectance of the waveguide assembly 100 for the light. In this embodiment, antireflection film 50 may be understood as an antireflection film formed by integrally forming first antireflection film and second antireflection film 40 in the above embodiments. The detailed structure and function of antireflection film 50 can be referred to the description of the above embodiments, and are not repeated herein.
It is understood that in practical applications, the antireflection film 50 may or may not cover the first surface 11 of the waveguide substrate 10. Preferably, the antireflection film 50 may be disposed along the edge of the first surface 11, so that the waveguide assembly 100 can obtain better effects of improving transmittance and reducing reflectance of light behind the user.
In some embodiments, referring to fig. 10, fig. 10 is a schematic diagram of a fourth structure of a waveguide assembly 100 provided by the embodiments of the present application.
The waveguide substrate 10 also has a second surface 12, the second surface 12 being disposed opposite the first surface 11. The second surface 12 may also be planar or curved. Wherein, second surface 12 is also provided with third antireflection coating 61. The third antireflection film 61 can also improve the transmittance and reduce the reflectance of light, thereby further improving the transmittance and reducing the reflectance of light by the waveguide assembly 100.
In some embodiments, with continued reference to fig. 10, the waveguide assembly 100 further includes a first protective glass 62 and a second protective glass 63.
Wherein the first protective glass 62 is disposed at a distance from the waveguide substrate 10, and the first protective glass 62 is disposed on the first surface 11 side of the waveguide substrate 10. An air gap may be formed between the first protective glass 62 and the waveguide substrate 10, and the thickness of the formed air gap may be 0.1 mm. For example, a spacer, such as a glass bead 66, may be disposed between the first protective glass 62 and the waveguide substrate 10, with the glass bead 66 forming an air gap.
The second cover glass 63 is disposed at a distance from the waveguide substrate 10, and the second cover glass 63 is disposed on the second surface 12 side of the waveguide substrate 10. An air gap may also be formed between the second cover glass 63 and the waveguide substrate 10, and the thickness of the formed air gap may be 0.1 mm. For example, a spacer, such as a glass bead 66, may be disposed between the second cover glass 63 and the waveguide substrate 10, with an air gap being formed by the glass bead 66.
It is understood that when the third antireflection film 61 is disposed on the second surface 12 of the waveguide substrate 10, glass beads 66 may be disposed between the third antireflection film 61 and the second cover glass 63 to form an air gap between the third antireflection film 61 and the second cover glass 63.
The materials of the first protective glass 62 and the second protective glass 63 may include transparent glass. The thicknesses of the first protective glass 62 and the second protective glass 63 are both 0.3mm to 1 mm.
In some embodiments, with continued reference to FIG. 10, a fourth antireflective film 64 is disposed on a side of first protective glass 62 facing away from waveguide substrate 10, and a fifth antireflective film 65 is disposed on a side of second protective glass 63 facing away from waveguide substrate 10.
The fourth antireflection film 64 and the fifth antireflection film 65 can both improve the transmittance and reduce the reflectance of the light, so as to further improve the transmittance and reduce the reflectance of the waveguide assembly 100.
Referring to fig. 11, fig. 11 is a schematic view illustrating light propagation of the waveguide assembly 100 shown in fig. 10. In practical applications, after the user wears the AR glasses, the eye 200 is located on the side of the waveguide assembly 100 where the grating 20 is located. After external ambient light R is incident on the waveguide assembly 100, firstly, reflection and refraction occur at the interface between the first protective glass 62 and the fourth antireflection film 64, at this time, more than 99% of light enters the waveguide assembly 100 through refraction for transmission, only less than 1% of light is reflected to form reflected light R3, and the reflected light R3 can enter human eyes; when the light ray R continues to be transmitted to the waveguide substrate 10, the light ray R is reflected and refracted again at the interface between the waveguide substrate 10 and the anti-reflection structure 30, at this time, most of the light ray continues to be transmitted along the inside of the waveguide assembly 100 through refraction, only very weak light ray is reflected to form a reflected light ray R4, and the reflected light ray R4 can enter human eyes; the light ray R transmitted inside the waveguide assembly 100 finally passes through the waveguide assembly 100 and is transmitted to the outside again, so as to form a transmitted light ray R5, and the transmitted light ray R5 does not enter human eyes.
Therefore, after the external ambient light passes through the waveguide assembly 100, only a few of light rays R3 and R4 can enter human eyes, and most of light rays R5 cannot enter human eyes, so that the external ambient light on one side of the grating 20 can be greatly reduced from entering human eyes through reflection, and the interference of the external ambient light on the human eyes is reduced.
Embodiments of the present application also provide an AR lens, which includes the waveguide assembly 100 of any of the above embodiments.
The embodiment of the application also provides AR glasses. Referring to fig. 12 and 13, fig. 12 is a schematic structural diagram of AR glasses 300 provided in an embodiment of the present application, and fig. 13 is a schematic plan view of AR glasses 300 provided in an embodiment of the present application.
The AR glasses 300 include a frame 310, a first AR lens 320, and a second AR lens 330, the first AR lens 320 and the second AR lens 330 being mounted to the frame 310. The spectacle frame 310 includes a spectacle frame 311 and a spectacle leg 312. Eyeglass frame 311 is configured to mount first AR lens 320 and second AR lens 330. The temples 312 are configured to enable the user to wear the AR glasses 300.
In this embodiment, the first AR lens 320 and the second AR lens 330 are both AR lenses provided in the embodiments of the present application, that is, both waveguide assemblies 100 in any of the embodiments described above are included.
In some embodiments, referring to fig. 14, fig. 14 is a schematic view of the arrangement of the gratings and the anti-reflection structures in the AR glasses 300 shown in fig. 13.
Both the first AR optic 320 and the second AR optic 330 comprise a waveguide assembly 100, the waveguide assembly 100 comprising a grating 20 and an anti-reflective structure 30. The anti-reflection structure 30 of the waveguide assembly of the first AR lens 320 is disposed at an end of the first AR lens 320 away from the second AR lens 330, and the anti-reflection structure 30 of the waveguide assembly of the second AR lens 330 is disposed at an end of the second AR lens 330 away from the first AR lens 320. That is, the antireflective structures 30 in both first AR lens 320 and second AR lens 330 are disposed on the outside of the entire AR eyewear 300.
It can be understood that, in practical applications, when the user wears the AR glasses 300, the outer side of the AR glasses 300 easily reflects light behind the user, and the middle portion of the AR glasses 300 is blocked by the face of the user, so that light behind the user is not easily reflected. Therefore, when the anti-reflection structure 30 is disposed on the outer side of the AR glasses 300, the light from the rear of the user can be better reduced to enter the human eyes through reflection, so that the interference of the external ambient light to the human eyes is reduced.
With continued reference to fig. 14, a direction along the second AR lens 330 toward the first AR lens 320 is defined as an X-direction, and a direction perpendicular to the X-direction and parallel to the second AR lens 330 is defined as a Y-direction.
The size of the anti-reflection structure 30 of the first AR lens 320 along the X axis may be in a range of 10mm to 30mm, the size along the Y axis may be in a range of 40mm to 50mm, and the Y axis may cover the entire side of the first AR lens 320.
The anti-reflective structure 30 of the second AR lens 330 may have a size in the range of 10mm to 30mm along the X-axis and 40mm to 50mm along the Y-axis, and the Y-axis direction may cover the entire side of the second AR lens 330.
In some embodiments, when the antireflection film 50 is disposed on the waveguide substrate 10 of the waveguide assembly 100, since the antireflection films 50 in the first AR lens 320 and the second AR lens 330 are integrally formed, after the first AR lens 320 and the second AR lens 330 are both mounted on the spectacle frame 310, the whole surface of the spectacle frame 311 may be coated with the antireflection film, that is, the antireflection films 50 in the first AR lens 320 and the second AR lens 330 are simultaneously formed on the whole surface of the spectacle frame 311. When the surface of the glasses frame 311 is plated with the antireflection film, the antireflection film may be disposed from the left side of the glasses frame 311 to the right side of the glasses frame 311 along the X axis, the dimension along the X axis may be 100mm to 140mm, and the dimension along the Y axis may be 40mm to 50 mm.
In the description of the present application, it is to be understood that terms such as "first", "second", and the like are used merely to distinguish one similar element from another, and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated.
The waveguide assembly, the AR lens, and the AR glasses provided in the embodiments of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (18)
1. A waveguide assembly, comprising:
a waveguide substrate, a first surface of the waveguide substrate comprising a first region and a second region;
a grating disposed in the first region; and
an anti-reflection structure disposed in the second region, the anti-reflection structure configured to increase a transmittance of the waveguide assembly for light rays incident to the second region and decrease a reflectance of the waveguide assembly for the light rays.
2. The waveguide assembly of claim 1, wherein the anti-reflective structure comprises a plurality of microstructures periodically arranged along the second region, the microstructures having an arrangement period of 200nm to 450nm, and the microstructures having a dimension in a direction perpendicular to the second region of 200nm to 700 nm.
3. The waveguide assembly of claim 2, wherein the microstructures are one of pyramidal cylindrical, bullet, truncated conical, and parabolic in shape.
4. The waveguide assembly of claim 2, wherein the microstructures are formed in the second region by nanoimprinting.
5. The waveguide assembly of claim 1, wherein the antireflective structure comprises a first antireflective film.
6. The waveguide assembly of claim 5, wherein the refractive index of the first antireflective film satisfies the relationship:
wherein n1 is the refractive index of the first antireflection film, n0 is the refractive index of air, n2 is the refractive index of the waveguide substrate, and n2> n1> n 0.
7. The waveguide assembly of claim 5, further comprising a second anti-reflective coating disposed between the grating and the first region.
8. The waveguide assembly of claim 7, wherein the first antireflective film is integrally formed with the second antireflective film.
9. The waveguide assembly of claim 7, wherein the grating is formed in the first region by way of nanoimprinting.
10. A waveguide assembly according to any one of claims 1 to 9, wherein the first region is contiguous with the second region.
11. The waveguide assembly of any one of claims 1 to 9, wherein the second region is peripherally disposed to the first region.
12. A waveguide assembly according to any one of claims 1 to 9, wherein a second surface of the waveguide substrate, which is opposite the first surface, is further provided with a third antireflection film.
13. The waveguide assembly of claim 12, further comprising a first protective glass and a second protective glass disposed in spaced relation to the waveguide substrate, the first protective glass disposed on the first surface side and the second protective glass disposed on the second surface side.
14. A waveguide assembly according to claim 13, wherein the first protective glass is provided with a fourth antireflective coating on the side facing away from the waveguide substrate and the second protective glass is provided with a fifth antireflective coating on the side facing away from the waveguide substrate.
15. A waveguide assembly, comprising:
a waveguide substrate;
the antireflection film is arranged on one surface of the waveguide substrate; and
the grating is arranged on the antireflection film;
the forward projection area of the antireflection film on the waveguide substrate is larger than that of the grating on the waveguide substrate, and the antireflection film is configured to improve the transmittance of the waveguide assembly to light incident on the antireflection film and reduce the reflectance of the waveguide assembly to the light.
16. An AR lens comprising the waveguide assembly of any one of claims 1 to 15.
17. AR eyewear, comprising:
a spectacle frame;
a first AR lens mounted to the eyeglass frame, the first AR lens being the AR lens of claim 16; and
a second AR lens mounted to the eyeglass frame, the second AR lens being the AR lens of claim 16.
18. AR eyewear, comprising:
a spectacle frame;
a first AR lens mounted to the eyeglass frame, the first AR lens comprising the waveguide assembly of any of claims 1-14; and
a second AR lens mounted to the eyeglass frame, the second AR lens comprising the waveguide assembly of any of claims 1-14;
the anti-reflection structure of the waveguide assembly of the first AR lens is arranged at one end, far away from the second AR lens, of the first AR lens, and the anti-reflection structure of the waveguide assembly of the second AR lens is arranged at one end, far away from the first AR lens, of the second AR lens.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122282006.0U CN215641928U (en) | 2021-09-18 | 2021-09-18 | Waveguide assembly, AR lens and AR glasses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122282006.0U CN215641928U (en) | 2021-09-18 | 2021-09-18 | Waveguide assembly, AR lens and AR glasses |
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| CN215641928U true CN215641928U (en) | 2022-01-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690284A (en) * | 2022-03-31 | 2022-07-01 | 杭州逗酷软件科技有限公司 | Integrated lens, preparation method thereof and augmented reality equipment |
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- 2021-09-18 CN CN202122282006.0U patent/CN215641928U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690284A (en) * | 2022-03-31 | 2022-07-01 | 杭州逗酷软件科技有限公司 | Integrated lens, preparation method thereof and augmented reality equipment |
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