Optical system and display system

Abstract

The invention provides an optical system and a display system, and relates to the technical field of display, and the optical system comprises a polarization conversion assembly which is used for converting incident light into a plurality of first light with different polarization states; the zoom lens unit is used for changing the propagation direction of each of the plurality of first light rays to obtain a plurality of second light rays, and the zoom lens unit has different refraction angles on the first light rays in different polarization states; and the reflection assembly is used for reflecting the plurality of second light rays to obtain a plurality of third light rays, the different third light rays are respectively focused on different image surfaces to form a plurality of images, the distances from the different image surfaces to the observation point are different, and the image contents of the different image surfaces are the same.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of display technology, and in particular, to an optical system and a display system. Background Art

[0002] At present, multi-focus display technology (MFD) is different from traditional display technology. It can display different contents on display screens at different distances. Among them, head-up display (HUD) is a common technology in the automotive and aviation fields. It projects key information into the driver's or pilot's field of vision in a transparent way, so that they can obtain necessary information without shifting their gaze.

[0003] However, the focal length of the display screen in the existing HUD display device is fixed. When the human eye views the display screen, the eye focuses on the same image plane for a long time, which conflicts with the brain's regulation of the optic nerve. When the human eye continues to view such a display screen for too long, fatigue and dizziness will occur, resulting in convergence conflict. Therefore, how to eliminate the convergence conflict in the HUD display device has become a problem that needs to be solved urgently in the field. Summary of the invention

[0004] The embodiments of the present application provide an optical system and a display system, aiming to solve the problem of how to eliminate convergence conflict in a HUD display device.

[0005] A first aspect of an embodiment of the present application provides an optical system, comprising:

[0006] A polarization conversion component, used for converting an incident light beam into a plurality of first light beams with different polarization states;

[0007] A zoom lens unit, used for changing the propagation direction of each of the plurality of first light rays to obtain a plurality of second light rays, wherein the zoom lens unit has different refraction angles for the first light rays of different polarization states;

[0008] The reflection component is used to reflect the multiple second light rays to obtain multiple third light rays. Different third light rays are focused on different image planes to form multiple images. The distances from different image planes to the observation point are different, and the image contents of different image planes are the same.

[0009] In an optional embodiment, the incident light includes a first incident light and a second incident light of different brightness; the multiple first light includes a first polarized light and a second polarized light; the polarization conversion component is used to transmit the first incident light and form the first polarized light, and to transmit the second incident light and form the second polarized light.

[0010] In an optional embodiment, the second light includes a first refracted light corresponding to the first polarized light and a second refracted light corresponding to the second polarized light; the third light includes a first reflected light and a second reflected light;

[0011] The reflection component is used to reflect the first refracted light to obtain the first reflected light, and to reflect the second refracted light to obtain the second reflected light; the first reflected light is focused on a first image plane to form an image, and the second reflected light is focused on a second image plane to form an image, wherein the first image plane is located between the observation point and a preset position, and the second image plane is located on a side of the preset position away from the observation point.

[0012] In an optional embodiment, the incident light further includes at least one third incident light, the plurality of first light further includes at least one third polarized light, and the polarization conversion component is used to transmit the third incident light and form the third polarized light;

[0013] The second light also includes a third refracted light corresponding to the third polarized light, and the third light also includes a third reflected light. The reflecting component is used to reflect the third refracted light to obtain the third reflected light. The third reflected light is focused on a third image plane to form an image. The third image plane is located between the first image plane and the second image plane.

[0014] In an optional embodiment, the polarization conversion component includes a plurality of polarization modulation units, and the plurality of polarization modulation units are arranged at intervals along the propagation direction of the incident light. The first incident light passes through the plurality of polarization modulation units to form the first polarized light, and the second incident light passes through the plurality of polarization modulation units to form the second polarized light.

[0015] In an optional implementation, the zoom lens unit includes a metasurface lens array, and the metasurface lens array includes:

[0016] A substrate, the substrate comprising a light incident surface and a light emitting surface arranged opposite to each other;

[0017] A plurality of micro-modulation units are arranged on the light emitting surface, the plurality of micro-modulation units are arranged perpendicular to the surface of the substrate, and the plurality of micro-modulation units are arranged in an array.

[0018] In an optional implementation, the reflective component includes:

[0019] The first reflecting element and the second reflecting element are arranged opposite to each other, and the plurality of second light rays are reflected by the first reflecting element and the second reflecting element in sequence.

[0020] In an optional embodiment, the reflection component also includes a third reflection element, and the multiple second light rays are sequentially reflected by the first reflection element, the second reflection element and the third reflection element to form the multiple third light rays, and the multiple third light rays are respectively focused on different image planes to form multiple images.

[0021] In an optional implementation, the first reflective element and the second reflective element are arranged on the same side of the third reflective element.

[0022] A second aspect of the embodiments of the present application provides a display system, the display system comprising an optical system as described in any one of the first aspects of the embodiments of the present application, and,

[0023] A display panel is used to form the incident light.

[0024] Beneficial effects:

[0025] The present application provides an optical system and a display system, including: a polarization conversion component for converting incident light into a plurality of first light rays with different polarization states; a zoom lens unit for changing the propagation direction of each of the plurality of first light rays to obtain a plurality of second light rays, the zoom lens unit having different refraction angles for the first light rays with different polarization states; a reflection component for reflecting the plurality of second light rays to obtain a plurality of third light rays, the different third light rays are respectively focused on different image planes to form a plurality of images, the distances from different image planes to the observation point are different, and the image contents of different image planes are the same. The present application converts the incident light into a plurality of first light rays with different polarization states by setting a polarization conversion component, and refracts the first light rays with different polarization states at different angles through the zoom lens unit, so as to focus on image planes at a plurality of different distances to form images, so that the perception of human eyes when observing is consistent with that of viewing the real scene, thereby eliminating convergence conflict. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 is a schematic structural diagram of an optical system proposed in one embodiment of the present application;

[0028] Figure 2 is a schematic structural diagram of a plurality of lens units arranged in an array in an optical system proposed in one embodiment of the present application;

[0029] Figure 3 is a schematic diagram of refraction of light of different polarization states by a zoom lens unit in an optical system proposed in one embodiment of the present application;

[0030] Figure 4 is a schematic structural diagram of region a in a metasurface lens array in an optical system proposed in one embodiment of the present application;

[0031] Figure 5 is a schematic diagram of the cross-sectional structure of a metasurface lens array in an optical system proposed in one embodiment of the present application;

[0032] Figure 6 It is a schematic diagram of the refraction of light of different polarization states by a zoom lens unit of a metasurface lens array in an optical system proposed in one embodiment of the present application;

[0033] Figure 7 It is a schematic diagram of forming a first image plane and a second image plane in an optical system proposed in one embodiment of the present application.

[0034] 1. Display panel; 2. Polarization conversion component; 3. Zoom lens unit; 31. Lens unit; 32. Metasurface lens array; 321. Substrate; 322. Micro-modulation unit; 41. First reflection element; 42. Second reflection element; 43. Third reflection element; 51. First image plane; 52. Second image plane; 53. Preset position. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In the drawings, the size of the constituent elements, the thickness of the layer or the area may be exaggerated for the sake of clarity. Therefore, any implementation of the present disclosure is not necessarily limited to the size shown in the drawings, and the shapes and sizes of the components in the drawings do not reflect the true proportions. In addition, the drawings schematically show ideal examples, and any implementation of the present disclosure is not limited to the shapes or values ​​shown in the drawings.

[0037] At present, multi-focus display technology (MFD) is different from traditional display technology. It can display different content on display screens at different distances. Among them, the head-up display (HUD) is a common technology in the automotive and aviation fields. It projects key information into the driver's or pilot's field of view in a transparent way, so that they can obtain necessary information without shifting their gaze. The current in-vehicle HUD is mostly combined with augmented display technology (AR). ARHUD combines virtual information with real-world scenes, allowing drivers or pilots to see enhanced information in their field of view. ARHUD can seamlessly integrate with road scenes by projecting navigation routes, traffic signs, warning information, etc., providing more intuitive and rich driving assistance functions.

[0038] However, the focal length of the display screen in the existing HUD display device is fixed. When the human eye views the display screen, the eye focuses on the same image plane for a long time, which conflicts with the brain's regulation of the optic nerve. When the human eye continues to view such a display screen for too long, fatigue and dizziness will occur, resulting in convergence conflict.

[0039] In view of this, an embodiment of the present application proposes an optical system. Figure 1 FIG. 1 shows a schematic diagram of the structure of an optical system proposed in an embodiment of the present application. Figure 1 As shown, the optical system includes: a polarization conversion component 2, which is used to convert incident light into multiple first light rays with different polarization states; a zoom lens unit 3, which is used to change the propagation direction of each of the multiple first light rays to obtain multiple second light rays, and the zoom lens unit 3 has different refraction angles for the first light rays with different polarization states; a reflection component, which is used to reflect the multiple second light rays to obtain multiple third light rays, and each of the third light rays is focused on a different image plane to form a plurality of images, the distances from different image planes to the observation point are different, and the image contents of different image planes are the same.

[0040] In the embodiment of the present application, the polarization conversion component 2 is configured to change the polarization state of the incident light, and emit a plurality of first light rays with different polarization states to the zoom lens unit 3; the zoom lens unit 3 is configured to have different deflection capabilities for the first light rays with different polarization states, and after receiving the first light ray, deflects the first light ray to form a plurality of second light rays; the reflection component forms the third light ray by reflecting and amplifying the second light ray and modulating the propagation path of the second light ray, so that the third light ray is focused on different image planes, thereby forming a virtual image of the observation point for observation on the image plane.

[0041] Since the zoom lens unit 3 has different refraction angles for the first light rays of different polarization states, the distances from the multiple image planes to the observation point obtained by the second light ray passing through the reflective component are different. The distances from different image planes to the observation point are different. When the user observes at the observation point, he sees virtual images on multiple different image planes. The image contents of different image planes are the same. Through the adaptive adjustment function of the human eye, when the human eye focuses on the image content of one of the image planes, the other image planes are blurred, thereby being consistent with the feeling of the human eye when viewing the real scene and eliminating the convergence conflict.

[0042] In some optional embodiments, the plurality of first light rays include a first polarized light ray and a second polarized light ray, and the first polarized light ray and the second polarized light ray have different polarization states; the second light ray includes a first refracted light ray corresponding to the first polarized light ray and a second refracted light ray corresponding to the second polarized light ray, and the third light ray includes a first reflected light ray and a second reflected light ray. The reflecting component is used to reflect the first refracted light ray to obtain the first reflected light ray, and to reflect the second refracted light ray to obtain the second reflected light ray; the first reflected light ray is focused on the first image plane to form an image, and the second reflected light ray is focused on the second image plane to form an image.

[0043] Figure 7 FIG. 1 shows a schematic diagram of forming a first image plane and a second image plane in an optical system proposed in an embodiment of the present application. Figure 7 As shown, the first image plane 51 is located between the observation point and the preset position 53, and the second image plane 52 is located on the side of the preset position 53 away from the observation point. In the embodiment of the present application, the first image plane 51 and the second image plane 52 with different distances to the observation point are formed by deflecting the first polarized light and the second polarized light in different polarization states at different angles, so that when the user observes the image content of the first image plane 51 or the second image plane 52 at the observation point, the convergence conflict is eliminated by focusing on one of the image of the first image plane 51 and the image of the second image plane 52, while ensuring that the image content seen by the user at the observation point is near the preset position 53.

[0044] For example, Figure 7 For example, the distance from the first image plane 51 corresponding to the first polarized light to the observation point is Z1, the distance from the second image plane 52 corresponding to the second polarized light to the observation point is Z2, and the distance from the preset position 53 to the observation point is Z, wherein Z1 is smaller than Z, and Z is smaller than Z2.

[0045] In some optional embodiments, one of the first polarized light and the second polarized light is s-type polarized light, and the other is p-type polarized light. Figure 3FIG. 1 shows a schematic diagram of refraction of light of different polarization states by a zoom lens unit in an optical system proposed in an embodiment of the present application, such as Figure 3 As shown, the zoom lens unit 3 has different refraction angles for the s-type polarized light and the p-type polarized light, and the focal length of the s-type polarized light based on the light convergence ability of the zoom lens unit 3 is greater than the focal length of the p-type polarized light based on the light convergence ability of the zoom lens unit 3, so that the distances from the first image plane and the second image plane where the first reflected light and the second reflected light corresponding to the s-type polarized light and the p-type polarized light are focused respectively to the observation point are different.

[0046] In some optional embodiments, in order to merge the image contents of the first image plane 51 and the image plane 52 so that when a user observes the image contents based on the first image plane 51 and the second image plane 52, the observed image contents are at the predicted position, the present application adjusts the image brightness of the first image plane 51 and the image brightness of the second image plane 52. Specifically, the incident light includes a first incident light and a second incident light of different brightness; the polarization conversion component is used to transmit the first incident light and form the first polarized light, and to transmit the second incident light and form the second polarized light. Figure 7 As shown, when the first polarized light and the second polarized light with different brightness form the corresponding first image plane 51 and the second image plane 52, the brightness of the first image plane 51 and the second image plane 52 are different. When the human eye observes the first image plane 51 and the second image plane 52 at the observation point, the first image plane 51 and the second image plane 52 are weightedly fused with their respective brightness as weights, so that the image content observed by the user's eye is at the predicted position 53 between the first image plane 51 and the second image plane 52, and the depth sense of the image content of the first image plane 51 and the second image plane 52 is achieved.

[0047] In some optional embodiments, in order to further enhance the effect of eliminating convergence conflict, the incident light further includes at least one third incident light, the multiple first light further includes at least one third polarized light, the third polarized light has a different polarization direction from the first polarized light and the second polarized light; the polarization conversion component 2 is used to pass the third incident light and form the third polarized light. The second light further includes a third refracted light corresponding to the third polarized light, the third light further includes a third reflected light, the reflective component is used to reflect the third refracted light to obtain the third reflected light, the third reflected light is focused on the third image plane to form an image, because the third polarized light has a different polarization direction from the first polarized light and the second polarized light, the distance from the third image plane to the observation point is different from the first image plane and the second image plane, and the third image plane is located between the first image plane 51 and the second image plane 52. An image is formed by focusing the third reflected light on the third image plane. When a user observes the image content at an observation point, the image of the first image plane 51, the image of the second image plane 52 and the image of the third image plane are focused to blur the other image planes, thereby eliminating convergence conflicts under the action of the adaptive adjustment function of the human eye.

[0048] In some optional embodiments, when the multiple first light rays include a first polarized light ray and a second polarized light ray, the polarization conversion component 2 includes at least one polarization modulation unit, and the polarization modulation unit is configured to transmit the incident light ray and form the first polarized light ray and the second polarized light ray.

[0049] In some optional embodiments, when the first light includes multiple first light rays including a first polarized light, a second polarized light and at least one third polarized light, the polarization conversion component 2 includes multiple polarization modulation units, and the multiple polarization modulation units are arranged at intervals along the propagation direction of the incident light. The first incident light passes through the multiple polarization modulation units to form the first polarized light, the second incident light passes through the multiple polarization modulation units to form the second polarized light, and the third incident light passes through the multiple polarization modulation units to form the third polarized light.

[0050] In some optional implementations, the zoom lens unit 3 includes an integrally formed zoom lens.

[0051] In some optional embodiments, Figure 2 FIG. 1 shows a schematic diagram of a structure of a plurality of lens units arranged in an array in an optical system according to an embodiment of the present application. Figure 2As shown, in order to enhance the deflection effect of the zoom lens unit 3 on the first light of different polarization states, the zoom lens unit 3 includes a plurality of lens units 31 arranged in an array. Optionally, the plurality of lens units 31 are arranged in an array along a row direction and a column direction, and in the row direction, the plurality of lens units 31 in two adjacent columns are aligned, and the adjacent lens units 31 are closely arranged.

[0052] In some optional embodiments, Figure 5 FIG. 4 shows a schematic cross-sectional structure diagram of a metasurface lens array in an optical system proposed in one embodiment of the present application. Figure 5 As shown, the zoom lens unit 3 includes a metasurface lens array 32, wherein the metasurface lens array is a planar structure that can effectively manipulate the wavefront, and has the advantages of being ultra-micro and ultra-thin, and precisely modulated. Since it was proposed, it has been used in the design and manufacture of various optical components, including lenses, wave plates, polarizers, and the like.

[0053] Figure 6 FIG. 1 is a schematic diagram showing the refraction of light of different polarization states by a zoom lens unit of a metasurface lens array in an optical system proposed in one embodiment of the present application, such as Figure 6 As shown, the metasurface lens array 32 is configured to have different phase modulation capabilities for light of different wavelengths, so that the first light can obtain image planes at different distances after passing through the metasurface lens array 32. Exemplarily, the metasurface lens array 32 has different refraction angles for the s-type polarized light and the p-type polarized light, and the focal length of the s-type polarized light refracted by the metasurface lens array 32 is greater than the focal length of the p-type polarized light refracted by the metasurface lens array 32, so that the first image plane 51 and the second image plane 52 formed by the second light corresponding to the s-type polarized light and the p-type polarized light are at different distances from the observation point.

[0054] In some optional embodiments, the metasurface lens array includes: a substrate 321, the substrate 321 includes a light incident surface and a light emitting surface that are relatively arranged; a plurality of micro-modulation units 322, the plurality of micro-modulation units 322 are arranged on the light emitting surface, the plurality of micro-modulation units 322 are arranged perpendicular to the surface of the substrate 321, and the plurality of micro-modulation units 322 are arranged in an array. Figure 4 FIG. 1 shows a schematic diagram of the structure of region a in a metasurface lens array in an optical system proposed in one embodiment of the present application. Figure 4 and Figure 5 As shown, Figure 4 The structure shown in Figure 5 The structure of the metasurface lens array region a shown in FIG. 1 includes a micro-modulation unit 322 and a portion of a lower substrate 321 corresponding to the micro-modulation unit 322, and a plurality of Figure 4The structures shown in FIG. 1 are arranged in an array to form a Figure 5 The metasurface lens array shown.

[0055] In some optional embodiments, such as Figure 1 As shown, the reflection component includes: a first reflection element 41 and a second reflection element 42 which are arranged opposite to each other, the first reflection element 41 is used to receive a plurality of second light rays emitted by the zoom lens unit 3, and reflect the plurality of second light rays to the second reflection element 42; the second reflection element 42 is used to receive and reflect the plurality of second light rays emitted by the first reflection element 41.

[0056] In some optional embodiments, such as Figure 1 As shown, the reflection component also includes a third reflection element 43, and the third reflection element 43 is used to receive the multiple second light rays emitted by the second reflection element 42, and reflect the multiple second light rays emitted by the second reflection element 42 to the observation point to form a third light ray, so that the multiple third light rays emitted by the third reflection element 43 are focused on different image planes to form images.

[0057] In some optional embodiments, in order to avoid the first reflecting element 41 and the second reflecting element 42 from affecting the multiple second light rays emitted by the third reflecting element 43 and the multiple second light rays incident on the third reflecting element 43, in an embodiment of the present application, the first reflecting element 41 and the second reflecting element 42 are arranged on the same side of the third reflecting element 43; the position of the first reflecting element 41 does not interfere with the propagation direction of the light rays emitted by the second reflecting element 42 and the third reflecting element 43.

[0058] In some optional embodiments, the optical system is an optical system provided on a vehicle, the observation point is the driver's eyes, the third reflective element is a windshield, and the images of the multiple image planes are formed on a side of the windshield away from the observation point. Exemplarily, the vehicle includes but is not limited to a car, an airplane, etc.

[0059] The present application provides an optical system and a display system, including: a polarization conversion component for converting incident light into a plurality of first light rays with different polarization states; a zoom lens unit for changing the propagation direction of each of the plurality of first light rays to obtain a plurality of second light rays, the zoom lens unit having different refraction angles for the first light rays with different polarization states; a reflection component for reflecting the plurality of second light rays to obtain a plurality of third light rays, the different third light rays are respectively focused on different image planes to form a plurality of images, the distances from different image planes to the observation point are different, and the image contents of different image planes are the same. The present application converts the incident light into a plurality of first light rays with different polarization states by setting a polarization conversion component, and refracts the first light rays with different polarization states at different angles through the zoom lens unit, so as to focus on image planes at a plurality of different distances to form images, so that the perception of human eyes when observing is consistent with that of viewing the real scene, thereby eliminating convergence conflict.

[0060] Based on the same inventive concept, an embodiment of the present application discloses a display system, which includes an optical system and a display panel as described in the embodiment of the present application, and the display panel is used to form the incident light.

[0061] In some optional embodiments, the display panel can be a liquid crystal display (LCD) display panel, or an organic light emitting diode (OLED) display panel, a quantum dot light emitting diode (QLED) display panel, etc., which is not specifically limited in the embodiments of the present application.

[0062] Based on the same inventive concept, an embodiment of the present application discloses a display device, which includes the display system described in the embodiment of the present application, wherein the display device is used to display an image.

[0063] In some optional embodiments, the display device includes but is not limited to televisions, laptops, tablet computers, mobile phones, personal digital assistants (PDAs), navigators, wearable devices, virtual reality (VR) devices, and any other products or components with display functions. Those skilled in the art may make corresponding choices based on the actual use of the display device, and this application will not go into details herein.

[0064] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0065] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, apparatuses, electronic devices, and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0066] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0067] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0068] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0069] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0070] The optical system and display system provided by the present application are introduced in detail above. The principles and implementation methods of the present application are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An optical system, characterized in that: include: A polarization conversion component, used for converting an incident light beam into a plurality of first light beams with different polarization states; A zoom lens unit, used for changing the propagation direction of each of the plurality of first light rays to obtain a plurality of second light rays, wherein the zoom lens unit has different refraction angles for the first light rays of different polarization states; The reflection component is used to reflect the multiple second light rays to obtain multiple third light rays. Different third light rays are focused on different image planes to form multiple images. The distances from different image planes to the observation point are different, and the image contents of different image planes are the same.

2. The optical system according to claim 1, characterized in that The incident light includes a first incident light and a second incident light of different brightness; the multiple first lights include a first polarized light and a second polarized light; the polarization conversion component is used to transmit the first incident light and form the first polarized light, and to transmit the second incident light and form the second polarized light.

3. The optical system according to claim 2, characterized in that The second light includes a first refracted light corresponding to the first polarized light and a second refracted light corresponding to the second polarized light; the third light includes a first reflected light and a second reflected light; The reflection component is used to reflect the first refracted light to obtain the first reflected light, and to reflect the second refracted light to obtain the second reflected light; the first reflected light is focused on a first image plane to form an image, and the second reflected light is focused on a second image plane to form an image, wherein the first image plane is located between the observation point and a preset position, and the second image plane is located on a side of the preset position away from the observation point.

4. The optical system according to claim 2, characterized in that The incident light further includes at least one third incident light, the plurality of first light further includes at least one third polarized light, and the polarization conversion component is used to transmit the third incident light and form the third polarized light; The second light also includes a third refracted light corresponding to the third polarized light, and the third light also includes a third reflected light. The reflecting component is used to reflect the third refracted light to obtain the third reflected light. The third reflected light is focused on a third image plane to form an image. The third image plane is located between the first image plane and the second image plane.

5. The optical system according to claim 2, characterized in that The polarization conversion component includes a plurality of polarization modulation units, which are arranged at intervals along the propagation direction of the incident light. The first incident light passes through the plurality of polarization modulation units to form the first polarized light, and the second incident light passes through the plurality of polarization modulation units to form the second polarized light.

6. The optical system according to claim 1, characterized in that The zoom lens unit includes a metasurface lens array, and the metasurface lens array includes: A substrate, the substrate comprising a light incident surface and a light emitting surface arranged opposite to each other; A plurality of micro-modulation units are arranged on the light emitting surface, the plurality of micro-modulation units are arranged perpendicular to the surface of the substrate, and the plurality of micro-modulation units are arranged in an array.

7. The optical system according to any one of claims 1 to 6, characterized in that: The reflective component comprises: The first reflecting element and the second reflecting element are arranged opposite to each other, and the plurality of second light rays are reflected by the first reflecting element and the second reflecting element in sequence.

8. The optical system according to claim 7, characterized in that The reflection component also includes a third reflection element, and the plurality of second light rays are sequentially reflected by the first reflection element, the second reflection element and the third reflection element to form the plurality of third light rays, and the plurality of third light rays are respectively focused on different image planes to form a plurality of images.

9. The optical system according to claim 8, characterized in that The first reflecting element and the second reflecting element are disposed on the same side of the third reflecting element.

10. A display system, characterized in that: The display system comprises the optical system according to any one of claims 1 to 9, and A display panel is used to form the incident light.

Images