CN211878334U - Optical module and augmented reality device - Google Patents

Abstract

The utility model discloses an optical module and augmented reality device relates to near-to-eye display technology field. Including assembling optical assembly, first anti-subassembly and the second of passing through, assemble optical assembly and set up in image source light emission direction, the income light side of assembling optical assembly is provided with first optical assembly, the light-emitting side of assembling optical assembly is provided with second optical assembly, first optical assembly with second optical assembly is used for transmitting incident light's partial light and reflects partial light, first pass through anti-subassembly set up in second optical assembly transmits light one side of image source, the second pass through anti-subassembly set up in first pass through anti-subassembly reflection the light one side of image source. The compactness of an imaging structure can be improved while the imaging quality is ensured.

Description

Optical module and augmented reality device

Technical Field

The utility model relates to a near-to-eye display technology field particularly, relates to an optical module and augmented reality device.

Background

Augmented Reality (AR), which is a technology for calculating the position and angle of a camera image in real time and adding a corresponding image, aims to overlap a virtual world on a screen in the real world and perform interaction. The augmented reality technology not only shows real world information, but also displays virtual information at the same time, so that the real environment and the virtual object can exist in the same picture and space at the same time after being overlapped, thereby realizing the sensory experience beyond reality. In addition, Virtual Reality (VR), a computer simulation system that creates and experiences a Virtual world, uses a computer to create a simulated environment in which a user is immersed, both of which have imaging commonalities.

In the prior art, no matter augmented reality device or virtual reality device all need wear and use at user's head, in order to alleviate user's head pressure, promotes user experience effect, and compactness, lightweight are mainstream design direction. However, in pursuit of compactness and light weight, the quality of imaging is reduced, affecting the user viewing experience.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an optical module and augmented reality device can promote the compactness of formation of image structure when guaranteeing the image quality.

The embodiment of the utility model is realized like this:

an aspect of the embodiment of the utility model provides an optical module, including assembling optical assembly, first anti-subassembly and the second anti-subassembly that passes through, it sets up in image source light emission direction to assemble optical assembly, the income light side of assembling optical assembly is provided with first optical assembly, the light-emitting side of assembling optical assembly is provided with the second optical assembly, first optical assembly with second optical assembly is used for transmitting incident light's partial light and reflects partial light, first anti-subassembly set up in second optical assembly transmits light one side of image source, the second anti-subassembly set up in first anti-subassembly reflection the light one side of image source.

Optionally, the converging optical assembly includes a first converging lens, or the converging optical assembly includes a second converging lens and a third converging lens sequentially arranged along a light emission direction of the image source.

Optionally, the first optical assembly comprises a first transflective film and the second optical assembly comprises a second transflective film; when the converging optical assembly comprises a first converging lens, the first transflective film is arranged on the light-in side of the first converging lens, and the second transflective film is arranged on the light-out side of the first converging lens; when assembling optical assembly and including following the second convergent lens and the third convergent lens that the light transmission direction of image source set gradually, first anti-membrane that passes through set up in the income light side of second convergent lens, the second pass through anti-membrane set up in the light-emitting side of third convergent lens.

Optionally, the first optical assembly comprises a first transflective film, and the second optical assembly comprises a first 1/4 slide and a first polarizer; when the converging optical assembly comprises a first converging lens, the first transflective film is arranged on the light inlet side of the first converging lens, and the first 1/4 glass slide and the first polaroid are sequentially arranged on the light outlet side of the first converging lens; when converging optical assembly and including following second convergent lens and the third convergent lens that image source light emission direction set gradually, first anti-membrane that passes through set up in the income light side of second convergent lens, first 1/4 slide with first polaroid set gradually in the light-emitting side of third convergent lens.

Optionally, the first optical assembly further comprises a second 1/4 slide, the second 1/4 slide being located on a side of the first transflective film distal from the first or second converging lenses.

Optionally, the first optical assembly further comprises a second polarizer located on a side of the second 1/4 slide away from the first transflective film.

Optionally, an intermediate image plane is formed between the converging optical assembly and the first transflective assembly.

Optionally, the first and second transflective films have a transmittance of t and a reflectance of r, wherein 10% < t < 90%, 90% > r > 10%.

Optionally, a focal length | f of the converging optical assembly₁The range of | satisfies: 5mm<|f₁|<50 mm; the focal length | f of the second transflective assembly for reflection₂The range of | satisfies: 10mm<|f₂|<80 mm; the focal length | f of the second transflective assembly for transmission₃The range of | satisfies: l f₃|>1000mm。

An embodiment of the utility model provides an augmented reality device is still provided, including the image source, and as above arbitrary the optical module, the optical module assemble set up in image source light emission direction.

The utility model discloses beneficial effect includes:

the embodiment of the utility model provides an optical module and augmented reality device through setting up in the optical subassembly that assembles of the light emission direction of image source, can play the effect of assembling to the light that the image source sent, avoids the light of image source too dispersed, is favorable to reducing optical module spherical aberration, distortion and field curvature etc. and then improves the imaging quality. Through the first optical assembly that sets up and the second optical assembly that sets up at the play light side that assembles optical assembly's income light side, make the light that passes through from image source outgoing from first optical assembly after assembling optical assembly, reflect first optical assembly by second optical assembly again, the light that reflects back first optical assembly passes through once more after assembling optical assembly and transmits to first transflective assembly through second optical assembly, the light that the image source outgoing is through turning back many times in assembling optical assembly, can share the focal power of optical module, and correct the phase difference, need not to adopt the form that increases the mirror group to promote the imaging quality, be favorable to promoting the compactness of augmented reality device structure. The light transmitted to the first transflective assembly through the second optical assembly is reflected to the second transflective assembly, then reflected back to the first transflective assembly, and transmitted from the first transflective assembly, so that the light emitted by the image source enters human eyes. And the light of environment light directly passes through from second transflective assembly and first transflective assembly transmission in proper order to get into people's eye, thereby make true environment and virtual image stack. By adopting the above mode, the imaging quality of the augmented reality device can be improved in the virtual image imaging process, the purpose can be realized without excessively arranging other optical mirror groups, and the compactness of the imaging structure can be improved while the imaging quality is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an optical module according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of an optical module according to an embodiment of the present invention;

fig. 3 is a third schematic structural diagram of an optical module according to an embodiment of the present invention;

fig. 4 is a fourth schematic structural diagram of an optical module according to an embodiment of the present invention;

fig. 5 is a graph illustrating a modulation transfer function curve of an optical module according to an embodiment of the present invention;

fig. 6 is a distortion diagram of the imaging of the optical module according to the embodiment of the present invention.

Icon: 100-an optical module; 105-an image source; 107-human eye; 110-a converging optical component; 112-a first converging lens; 114-a second converging lens; 116-a third converging lens; 120-a first transflective assembly; 130-a second transflective assembly; 140-a first optical component; 150-a second optical component; 160-intermediate image plane.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The application of optical module 100, can be applied to augmented reality device, also can be applied to virtual reality device, the difference lies in: when applied to an augmented reality device, the second transflective assembly 130 needs to transmit ambient light; when applied to a virtual reality device, the second transflective assembly 130 need not be used to transmit ambient light, but only needs to use its reflective function. The present application takes an enhanced implementation device as an example for illustration:

referring to fig. 1, the present embodiment provides an optical module 100, including a converging optical element 110, a first transflective element 120, and a second transflective element 130, where the converging optical element 110 is disposed in a light emitting direction of an image source 105, a light incident side of the converging optical element 110 is provided with a first optical element 140, a light emergent side of the converging optical element 110 is provided with a second optical element 150, the first optical element 140 and the second optical element 150 are used for transmitting a part of incident light and reflecting a part of incident light, the first transflective element 120 is disposed on a light side of the second optical element 150 transmitting the image source 105, and the second transflective element 130 is disposed on a light side of the first transflective element 120 reflecting the image source 105.

It should be noted that, first, the embodiment of the present invention does not specifically limit the structural form of the image source 105, as long as the required imaging effect can be ensured, and the present invention is applicable to the structure of the present application. For example, the image source 105 may employ any one of an organic light-Emitting Diode (OLED), a Liquid Crystal On Silicon (LCOS), a Liquid Crystal Display (LCD), a Micro light-Emitting Diode (Micro LED), or a Mini LED (Mini LED). In addition, the light emitted from the image source 105 is not particularly limited, and may be linearly polarized, unpolarized, or circularly polarized, for example.

Second, the first optical assembly 140 and the second optical assembly 150 are used for transmitting part of the incident light and reflecting part of the incident light, so that part of the light emitted from the image source 105 and transmitted through the first optical assembly 140 is reflected back to the first optical assembly 140 under the action of the second optical assembly 150, and then is reflected by the first optical assembly 140 and finally is emitted from the second optical assembly 150. The light emitted from the second optical assembly 150 is reflected to the second transflective assembly 130 by the first transflective assembly 120, and then enters the visible range of the human eye 107 from the first transflective assembly 120 by the reflection of the second transflective assembly 130.

Third, the first transflective assembly 120 is mainly used to change the direction of the light path of the light emitted from the second optical assembly 150 in a reflective manner, so that the light emitted from the image source 105 is reflected from the first transflective assembly 120 to the second transflective assembly 130, and then is incident from the first transflective assembly 120 through the reflection of the second transflective assembly 130, and finally enters the visible range of the human eye 107. At the same time, ambient light transmitted through the second transflective assembly 130 is passed through the first transflective assembly 120 into the visible range of the human eye 107. Therefore, first assembly 120 that reflects that passes through can adopt transparent substrate to it can to set up the anti-membrane that passes through on transparent substrate, and concrete anti-proportion that passes through can set up according to actual need, in order to guarantee the better integration of ambient light and the virtual image that generates. Similarly, the second transflective assembly 130 may employ spherical, aspheric or free-form optical elements, and a transflective film is disposed on the optical elements to transmit ambient light and reflect light reflected from the image source 105 to the second transflective assembly 130.

The embodiment of the utility model provides an optical module 100 through setting up in the optical subassembly 110 that assembles of the light emission direction of image source 105, can play the effect of assembling to the light that image source 105 sent, avoids image source 105's light too dispersed, is favorable to reducing optical module 100 spherical aberration, distortion and field curvature etc. and then improves the imaging quality. Through the first optical assembly 140 arranged on the light inlet side of the converging optical assembly 110 and the second optical assembly 150 arranged on the light outlet side of the converging optical assembly 110, light emitted from the image source 105 passes through the converging optical assembly 110 and then is reflected back to the first optical assembly 140 by the second optical assembly 150, light reflected back to the first optical assembly 140 passes through the converging optical assembly 110 again and then is transmitted to the first transflective assembly 120 through the second optical assembly 150, light emitted from the image source 105 is turned back for multiple times in the converging optical assembly 110, the focal power of the optical module 100 can be shared, phase difference can be corrected, the imaging quality is improved without adopting a form of adding a lens group, and the compactness of the augmented reality device structure is improved. The light transmitted to the first transflective assembly 120 by the second optical assembly 150 is reflected to the second transflective assembly 130, then reflected back to the first transflective assembly 120, and transmitted from the first transflective assembly 120, such that the light emitted from the image source 105 enters the human eye 107. While the rays of ambient light are transmitted directly from the second transflective assembly 130 and the first transflective assembly 120 in sequence to enter the human eye 107, thereby superimposing the real environment with the virtual image. By adopting the above mode, the imaging quality of the augmented reality device can be improved in the virtual image imaging process, the purpose can be realized without excessively arranging other optical mirror groups, and the compactness of the imaging structure can be improved while the imaging quality is ensured.

Referring to fig. 5 and 6, fig. 5 is a graph of the modulation transfer function of the optical module 100, and it can be seen from the graph that the MTF value is above 0.6 at 40lp/mm, so that the optical module 100 has a higher resolution and can improve the display quality. Fig. 6 is a distortion diagram of the imaging of the optical module 100, and it can be seen from the diagram that the imaging distortion is within 3%, and the distortion is small, which is beneficial to improving the picture quality and ensuring the sensory experience of the user.

As shown in fig. 1, the converging optical assembly 110 may include a first converging lens 112 in the present embodiment, or in the form as shown in fig. 2, the converging optical assembly 110 includes a second converging lens 114 and a third converging lens 116 sequentially arranged in a light emitting direction of the image source 105.

Specifically, the surface shape of the first converging lens 112 may be a spherical surface, an aspherical surface, or a free-form surface, as long as the imaging quality can be ensured. When the converging optical assembly 110 includes the first converging lens 112, the light emitted from the image source 105 passes through the first converging lens 112 and is reflected back to the first optical assembly 140 by the second optical assembly 150, the light reflected back to the first optical assembly 140 passes through the first converging lens 112 again and is transmitted to the first transflective assembly 120 by the second optical assembly 150, and the light emitted from the image source 105 is turned back for multiple times in the first converging lens 112, so that the imaging quality is improved.

Similarly, the surface shapes of the second collecting lens 114 and the third collecting lens 116 may also be spherical, aspherical, or free-form, and in addition, the form of combining the second collecting lens 114 and the third collecting lens 116 may be adopted, so that the problems of astigmatism and the like caused by light divergence may be reduced, and simultaneously, distortion occurring in the light propagation process may be better compensated, which is beneficial to improving the imaging quality. When the converging optical assembly 110 includes the second converging lens 114 and the third converging lens 116, the light emitted from the image source 105 passes through the first optical assembly 140, passes through the second converging lens 114 and the third converging lens 116, and is reflected back to the first optical assembly 140 by the second optical assembly 150, the light reflected back to the first optical assembly 140 passes through the second converging lens 114 and the third converging lens 116 again, and is transmitted to the first transflective assembly 120 by the second optical assembly 150, and the light emitted from the image source 105 is repeatedly turned back in the second converging lens 114 and the third converging lens 116, so that the imaging quality is further improved.

As shown in fig. 1, in one of the possible solutions of the present embodiment, when the light emitted from the image source 105 is in a linear polarization state, an unpolarized state or a circularly polarized state, the first optical assembly 140 includes a first transflective film, and the second optical assembly 150 includes a second transflective film; when the converging optical element 110 includes the first converging lens 112, the first transflective film is disposed on the light-incident side of the first converging lens 112, and the second transflective film is disposed on the light-emitting side of the first converging lens 112. At this time, the first transflective film and the second transflective film may be directly adhered or plated on the first collecting lens 112, so as to improve the utilization rate of the space.

Similarly, as shown in fig. 2, when the converging optical assembly 110 includes a second converging lens 114 and a third converging lens 116 sequentially arranged along the light emitting direction of the image source 105, a first transflective film is disposed on the light incident side of the second converging lens 114, and a second transflective film is disposed on the light exit side of the third converging lens 116. At this time, the first transflective film may be directly adhered or plated on the second collecting lens 114, and the second transflective film may be directly adhered or plated on the third collecting lens 116, so as to improve the utilization rate of the space.

In addition, the first and second transflective films have a transmittance of t and a reflectance of r, wherein 10% < t < 90%, 90% > r > 10%. For example, the transmittance of the first transflective film may be set to 10% and the reflectance may be set to 90%, or the transmittance of the first reflective film may be set to 90% and the reflectance may be set to 10%, or the transmittance of the first reflective film may be set to 50% and the reflectance may be set to 50%. Similarly, the transmittance of the second transflective film may be set to 10% and the reflectance may be set to 90%, or the transmittance of the second reflective film may be set to 90% and the reflectance may be set to 10%, or the transmittance of the second reflective film may be set to 50% and the reflectance may be set to 50%. The light intensity can be flexibly set according to the actual light intensity dimming requirement, so that the light rays incident to the human eyes 107 can be better fused and superposed.

In a second possible implementation of this embodiment, as shown in fig. 3, when the light from the image source 105 is circularly polarized, the first optical assembly 140 comprises a first transflective film and the second optical assembly 150 comprises a first 1/4 glass sheet and a first polarizer. Meanwhile, when the converging optical assembly 110 includes the first converging lens 112, the first transflective film is disposed on the light incident side of the first converging lens 112, and the first 1/4 glass slide and the first polarizer are sequentially disposed on the light emitting side of the first converging lens 112, that is, the first polarizer is disposed on one side of the first 1/4 glass slide away from the first converging lens 112.

In this manner, when the light in the circular polarization state is transmitted through the first transflective film, passes through the first collecting lens 112, and then passes through the first 1/4 glass plate, the light in the circular polarization state is converted into the light in the linear polarization state, and for convenience of description, the light in the circular polarization state is exemplified as S light (light in other polarization directions, such as P light), and the P light is transmitted and the S light is reflected by the first polarizer. Thus, the light reaching the first polarizer is reflected, passes through the first 1/4 glass sheet again, is circularly polarized again, and is reflected at the first transflective film after transmitting the first condenser lens 112. The reflected light again passes through the first condenser lens 112 and the first 1/4 glass slide, and is converted into P light and exits from the first polarizer.

Similarly, as shown in fig. 4, when the converging optical assembly 110 includes a second converging lens 114 and a third converging lens 116 arranged in sequence along the light emitting direction of the image source 105, a first transflective film is disposed on the light incident side of the second converging lens 114, and a first 1/4 glass slide and a first polarizer are disposed on the light emergent side of the third converging lens 116 in sequence, i.e., the first polarizer is disposed on the side of the first 1/4 glass slide away from the third converging lens 116.

In the above form, when the light in the circular polarization state is transmitted through the first transflective film, passes through the second collecting lens 114 and the third collecting lens 116, and then passes through the first 1/4 glass sheet, the light in the circular polarization state is converted into the light in the linear polarization state, and for convenience of description, the S light is taken as an example (light in other polarization directions, such as P light, may also be used), and at this time, the first polarizer is required to transmit the P light and reflect the S light. Thus, the light reaching the first polarizer is reflected, passes through the first 1/4 glass sheet again, is circularly polarized again, and is reflected at the first transflective film after passing through the third condenser lens 116 and the second condenser lens 114 in this order. The reflected light again passes through the second and third condensing lenses 114 and 116 and the first 1/4 glass plate, and is converted into P light and exits from the first polarizer.

By utilizing the phase retardation property of the 1/4 glass plate, the circularly polarized light is converted into linearly polarized light, and the linearly polarized light is reflected by the first polarizing plate, and after the polarized light passes through the first 1/4 glass plate again, the polarization direction of the polarized light is different by 90 degrees, so that the polarized light is transmitted from the first polarizing plate. The present application does not specifically limit the arrangement of the first 1/4 glass sheet and the first polarizing plate as long as the desired light path is satisfied. In addition, the first polaroid needs to adopt a reflection-type polaroid to avoid the absorption of the required light by the first polaroid.

As shown in fig. 3 and 4, when the light from the image source 105 is linearly polarized, the first optical assembly 140 further includes a second 1/4 glass slide, the second 1/4 glass slide being located on a side of the first transflective film away from the first converging lens 112 or the second converging lens 114.

Specifically, when the converging optical assembly 110 includes the first converging lens 112, the light rays exiting the image source 105 can exit the first polarizer after traveling back and forth between the first converging lens 112. When the second optical assembly 150 includes the first 1/4 glass sheet and the first polarizer, it is necessary to ensure that the light beam that is first incident on the first converging lens 112 is in a circularly polarized state, and therefore, a second 1/4 glass sheet is required to be disposed on the side of the first transflective film away from the first converging lens 112.

Similarly, when the converging optical assembly 110 includes the second converging lens 114 and the third converging lens 116, the light emitted from the image source 105 can pass between the second converging lens 114 and the third converging lens 116 before exiting the first polarizer. When the second optical assembly 150 includes the first 1/4 glass sheet and the first polarizer, it is necessary to ensure that the light rays that are first incident on the second converging lens 114 and the third converging lens 116 are in a circularly polarized state, and therefore, a second 1/4 glass sheet is required to be disposed on the side of the first transflective film away from the second converging lens 114.

As shown in fig. 3 and 4, when the light from image source 105 is unpolarized, first optical assembly 140 further includes a second polarizer located on the side of the second 1/4 slide away from the first transflective film.

Specifically, when the converging optical assembly 110 includes the first converging lens 112, the light rays exiting the image source 105 can exit the first polarizer after traveling back and forth between the first converging lens 112. When the second optical assembly 150 includes the first 1/4 glass plate and the first polarizer, it is necessary to ensure that the light beam that is incident to the first converging lens 112 for the first time is in a circular polarization state, so it is necessary to dispose the second 1/4 glass plate on the side of the first transflective film away from the first converging lens 112, and dispose the second polarizer on the side of the second 1/4 glass plate away from the first transflective film, so that the light beam that is incident to the first converging lens 112 for the first time is in a circular polarization state. Similarly, when the converging optical assembly 110 includes the second converging lens 114 and the third converging lens 116, the above-mentioned form is also adopted, and the description is omitted here.

In the foregoing embodiments, an intermediate image plane 160 is formed between the converging optical assembly 110 and the first transflective assembly 120. By imaging the light from the image source 105 a second time during the incident eye 107, the optical system can be advantageously enlarged in view and corrected for aberrations, while reducing distortion of the light incident from the first transflective assembly 120 and lengthening the optical focal length of the second transflective assembly 130, which makes the human vision more comfortable.

Optionally, the focal length | f of the converging optical assembly 110₁The range of | satisfies: 5mm<|f₁|<50mm, wherein the more preferred range is 7mm<|f₁|<25mm, so can be when guaranteeing to assemble the light that image source 105 sent, avoid the light dispersion, be favorable to promoting the quality of formation of image, reduce the distortion.

In addition, the focal length | f of the second transflective assembly 130 for reflection₂The range of | satisfies: 10mm<|f₂|<80mm, wherein the more preferable range is 20mm<|f₂|<50mm, so that the light rays incident to the human eyes 107 from the image source 105 can be prevented from being dispersed, and the imaging definition and resolution can be ensured; focal length | f of the second transflective assembly 130 for transmission₃The range of | satisfies: l f₃|>1000mm, wherein the more preferred range is | f₃|>3000mm, so, can reduce the light distortion that the ambient light incides to people's eye 107, be favorable to guaranteeing the true degree of formation of image, avoid visual fatigue, the time user is more comfortable in the use.

The embodiment of the utility model provides a still disclose an augmented reality device, including image source 105 to and the optical module 100 of aforementioned embodiment. The augmented reality device includes the same structure and advantages as the optical module 100 in the previous embodiment. The structure and advantages of the optical module 100 have been described in detail in the foregoing embodiments, and are not repeated herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an optical module, its characterized in that, including assembling optical assembly, first anti-subassembly and the second anti-subassembly that passes through, assemble optical assembly and set up in image source light emission direction, the income light side of assembling optical assembly is provided with first optical assembly, the light-emitting side of assembling optical assembly is provided with second optical assembly, first optical assembly with second optical assembly is used for the partial light transmission of incident light and reflects partial light, first anti-subassembly set up in second optical assembly transmission light one side of image source, the second anti-subassembly set up in first anti-subassembly reflection the light one side of image source.

2. The optical module of claim 1, wherein the converging optical element comprises a first converging lens, or wherein the converging optical element comprises a second converging lens and a third converging lens arranged in sequence along a light emission direction of the image source.

3. The optical module of claim 2 wherein the first optical component comprises a first transflective film and the second optical component comprises a second transflective film; when the converging optical assembly comprises a first converging lens, the first transflective film is arranged on the light-in side of the first converging lens, and the second transflective film is arranged on the light-out side of the first converging lens; when assembling optical assembly and including following the second convergent lens and the third convergent lens that the light transmission direction of image source set gradually, first anti-membrane that passes through set up in the income light side of second convergent lens, the second pass through anti-membrane set up in the light-emitting side of third convergent lens.

4. The optical module of claim 2 wherein the first optical assembly comprises a first transflective film and the second optical assembly comprises a first 1/4 slide and a first polarizer; when the converging optical assembly comprises a first converging lens, the first transflective film is arranged on the light inlet side of the first converging lens, and the first 1/4 glass slide and the first polaroid are sequentially arranged on the light outlet side of the first converging lens; when converging optical assembly and including following second convergent lens and the third convergent lens that image source light emission direction set gradually, first anti-membrane that passes through set up in the income light side of second convergent lens, first 1/4 slide with first polaroid set gradually in the light-emitting side of third convergent lens.

5. The optical module of claim 4 wherein the first optical assembly further comprises a second 1/4 slide, the second 1/4 slide being located on a side of the first transflective film that is distal from the first or second converging lenses.

6. The optical module of claim 5 wherein the first optical assembly further comprises a second polarizer located on a side of the second 1/4 slide away from the first transflective film.

7. An optical module according to any one of claims 1-6, characterised in that an intermediate image plane is formed between the converging optical element and the first transflective element.

8. The optical module of claim 3 wherein the first and second transflective films have a transmittance t and a reflectance r, wherein 10% < t < 90%, 90% > r > 10%.

9. The optical module of any of claims 1-6 wherein the focal length | f of the converging optical element₁The range of | satisfies: 5mm<|f₁|<50 mm; the focal length | f of the second transflective assembly for reflection₂The range of | satisfies: 10mm<|f₂|<80 mm; the focal length | f of the second transflective assembly for transmission₃The range of | satisfies: l f₃|>1000mm。

10. Augmented reality device comprising an image source and an optical module according to any one of claims 1 to 9, the converging optical component of the optical module being arranged in the direction of light emission of the image source.

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