Multi-focal-plane modulation assembly and multi-focal-plane three-dimensional imaging device

Abstract

The invention discloses a multi-focal-plane modulation assembly and a multi-focal-plane three-dimensional imaging device, and relates to the technical field of optics. The multi-focal-plane modulation assembly comprises a plurality of optical lenses, and any two optical lenses are different in focal length and / or curvature. The plurality of optical lenses are arranged in an incident light path of the image light source in a replaceable manner, and the image light source is emitted to a plurality of target positions for imaging through the plurality of optical lenses, wherein the target positions can be observed by human eyes. According to the multi-focal-plane modulation assembly, the optical lenses with different focal lengths and / or curvatures are circularly switched in a light path, so that images with different focal planes can be generated, the defect of a single focal plane in a traditional air display system is overcome, and the three-dimensional visual effect is improved; the lens replacement mode does not need a complex driving mechanism, and only simple mechanical switching is needed, so that the mechanical complexity and cost are reduced; meanwhile, the number of the optical lenses is multiple, and modulation of multiple focal planes is achieved while the size and the cost of the system are not increased.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to a multi-focal plane modulation component and a multi-focal plane stereoscopic imaging device. Background Art

[0002] Aerial display systems (such as heads-up displays (HUDs) and light field screens) use optical components to project virtual images onto specific spatial locations and are widely used in automotive, aviation, and augmented reality applications. The image plane generated by traditional aerial display systems is fixed to a single focal plane and cannot match the spatial depth distribution of objects in the real scene, resulting in a loss of three-dimensional vision, reduced information recognition efficiency, and reduced immersion.

[0003] To enhance 3D display, existing technologies propose two focal plane adjustment schemes: one involves adding an adjustable plane mirror set to the optical path. By adjusting the position or angle of the mirrors, the optical path is altered, achieving image plane displacement. However, this scheme requires multiple sets of precision movable mirrors, resulting in a complex structure and large space requirements. The other approach employs two optical mechanisms to project images with different focal planes, which are then combined into a single, co-directional optical path via a semi-transparent, semi-reflective mirror. While this scheme achieves dual-focal-plane display, it requires additional optical mechanism modules and beam splitters, increasing system size and cost. Summary of the Invention

[0004] The object of the present invention is to provide a multi-focal plane modulation component and a multi-focal plane stereoscopic imaging device, which can achieve rapid focal plane modulation while taking into account small size and low cost.

[0005] The embodiment of the present invention is achieved as follows: In one aspect of the present invention, a multi-focal plane modulation component is provided, comprising a plurality of optical lenses, wherein the focal length and / or curvature of any two optical lenses are different; the plurality of optical lenses are replaceably arranged in the incident light path of an image light source, and the image light source is emitted through the plurality of optical lenses to form images at a plurality of target positions observable by the human eye.

[0006] Optionally, the multi-focal plane modulation assembly further includes a driving mechanism, which is respectively connected to the plurality of optical lenses for driving the plurality of optical lenses to be replaceably arranged in the incident light path of the image light source.

[0007] Optionally, the driving mechanism drives the multiple optical lenses to rotate sequentially around a fixed axis into the incident light path of the image light source.

[0008] Optionally, the driving mechanism drives the plurality of optical lenses to move linearly back and forth in sequence into the incident light path of the image light source.

[0009] Optionally, the multi-focal plane modulation assembly further includes a first reflective element disposed on the light-emitting side of the optical lens. After the image light source passes through the multiple optical lenses and is incident on the first reflective element, the image light is emitted by the first reflective element to form images at multiple target locations observable by the human eye. Optionally, the target locations for the image formation are located between the first reflective element and the human eye; alternatively, the target locations for the image formation are reflected by the first reflective element to a side away from the human eye.

[0010] Optionally, the optical lens is a reflector or a lens.

[0011] Another aspect of the present invention provides a multi-focal plane stereoscopic imaging device, comprising an image generating unit and a multi-focal plane modulation component; the image generating unit can generate multiple images in a time sequence; the multi-focal plane modulation component includes multiple optical lenses that can be replaced and set synchronously with the image change time sequence, so that each image generated by the image generating unit is emitted through the corresponding optical lens; the image generated by the image generating unit is emitted through the corresponding optical lens to multiple target positions that can be observed by the human eye for imaging.

[0012] Optionally, the multi-focal plane stereoscopic imaging device also includes a second reflective element, and the multi-focal plane modulation component also includes a first reflective element arranged on the light-emitting side of the optical lens, and the second reflective element is arranged on the light-emitting side of the first reflective element; the image generated by the image generation unit is reflected by the first reflective element to the second reflective element, and then emitted by the second reflective element to multiple target positions that can be observed by the human eye for imaging.

[0013] Optionally, the target position of the image is located between the second reflective element and the human eye, or the target position of the image is reflected by the second reflective element to a side away from the human eye.

[0014] The beneficial effects of the present invention include: The present invention provides a multi-focal plane modulation assembly, comprising a plurality of optical lenses, wherein any two of the optical lenses have different focal lengths and / or curvatures; the plurality of optical lenses are replaceably arranged in the incident light path of an image light source, and the image light source is emitted through the plurality of optical lenses to form images at a plurality of target positions observable by the human eye. The multi-focal plane modulation assembly can generate images with different focal planes by cyclically switching between optical lenses of different focal lengths and / or curvatures in the light path, thereby resolving the drawback of a single focal plane in conventional aerial display systems and enhancing the three-dimensional visual effect. Furthermore, the lens replacement method does not require a complex drive mechanism, requiring only simple mechanical switching, thus reducing mechanical complexity and cost. Furthermore, the number of optical lenses is limited, achieving multi-focal plane modulation without increasing the system size and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the structure of a multi-focal plane modulation assembly provided by an embodiment of the present invention; Figure 2 The second structural diagram of the multi-focal plane modulation assembly provided by an embodiment of the present invention; Figure 3 The third structural diagram of the multi-focal plane modulation assembly provided by an embodiment of the present invention; Figure 4 The fourth structural diagram of the multi-focal plane modulation assembly provided by an embodiment of the present invention; Figure 5 The fifth structural diagram of the multi-focal plane modulation assembly provided by an embodiment of the present invention; Figure 6 The sixth structural diagram of the multi-focal plane modulation assembly provided by an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of a multi-focal plane stereoscopic imaging device provided by an embodiment of the present invention; Figure 8 A second structural diagram of a multi-focal plane stereoscopic imaging device provided by an embodiment of the present invention; Figure 9 The third structural diagram of the multi-focal plane stereoscopic imaging device provided by an embodiment of the present invention; Figure 10 A fourth structural diagram of a multi-focal plane stereoscopic imaging device provided by an embodiment of the present invention; Figure 11 A fifth structural diagram of a multi-focal plane stereoscopic imaging device provided by an embodiment of the present invention; Figure 12 This is the sixth structural diagram of the multi-focal plane stereoscopic imaging device provided by an embodiment of the present invention.

[0017] Icons: 100 - multi-focal plane modulation component; 110 - optical lens; 120 - first reflective element; 130 - driving mechanism; 200 - multi-focal plane stereoscopic imaging device; 210 - image generating unit; 220 - second reflective element; 300 - virtual image; 400 - human eye. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0022] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0023] Please refer to Figure 1 and Figure 2 This embodiment provides a multi-focal plane modulation component 100, including multiple optical lenses 110, and the focal length and / or curvature of any two optical lenses 110 are different; the multiple optical lenses 110 can be replaceably arranged in the incident light path of the image light source, and the image light source is emitted through the multiple optical lenses 110 to multiple target positions that can be observed by the human eye 400 to form images.

[0024] Specifically, Figure 1 and Figure 2The multi-focal plane modulation assembly 100 includes a plurality of optical lenses 110, wherein any two optical lenses 110 have different focal lengths and / or curvatures, i.e., each optical lens 110 has a different focal length and / or curvature. The specific focal length and curvature of the optical lenses 110 can be adjusted based on actual imaging requirements, and this application imposes no restrictions thereon. Furthermore, the number of optical lenses 110 is at least two, and as the number of lenses increases, the number of achievable focal planes increases simultaneously, further enhancing the interactive immersion. The optical lens 110 is arranged in the incident light path of the image light source, and the image light source is emitted through the optical lens 110. In one embodiment of the present application, the optical lens 110 can be a reflector or a lens. In one specific embodiment of the present application, Figure 1 As shown, the optical lens 110 is a reflector. The image can be reflected by the optical lens 110. Of course, if a lens is used as the optical lens 110, the light can be converged or diverged through the principle of refraction, and the focus adjustment function can also be achieved, providing more flexibility for system design.

[0025] Because different optical lenses 110 are provided with different focal lengths and / or curvatures, it is necessary to cyclically switch multiple optical lenses 110 so that the multiple optical lenses 110 are sequentially arranged in the light path where the image light source is located, thereby achieving cyclic replacement of the multiple optical lenses 110. It should be noted that the present application does not impose any restrictions on the cyclic replacement rate of the multiple optical lenses 110. To achieve a smooth multi-focal plane display effect, the switching process can be completed within milliseconds to ensure that the human eye's 400 degree persistence of vision effect does not perceive the interruption of the image.

[0026] Alternatively, as Figure 3 and Figure 4 As shown, a first reflective element 120 is also provided on the light-emitting side of the optical lens 110. After the image light source passes through multiple optical lenses 110 and is incident on the first reflective element 120 respectively, it is emitted by the first reflective element 120 to form images at multiple target positions that can be observed by the human eye 400.

[0027] The first reflective element 120 is configured to fold the optical path and further improve the imaging quality in conjunction with the optical lens 110. In this way, the image can be incident upon the first reflective element 120 by different optical lenses 110, and then reflected again by the first reflective element 120 to multiple target positions, forming a virtual image 300 observable by the human eye 400. In particular, the curvature and / or focal length of the optical lens 110 and the first reflective element 120 in different embodiments are different, so that the image can be imaged at different target positions. Specifically, in one possible embodiment of the present application, as Figure 5 、 Figure 6As shown, the target position of the image imaging can be located between the first reflective element 120 and the human eye 400, and multiple dotted lines are coaxially arranged; this arrangement enables the virtual image to be presented in a suspended form, which facilitates the user to quickly obtain information; In addition to the above-mentioned method, in another embodiment of the present application, as Figure 3 、 Figure 4 As shown, the target position of the image is reflected by the first reflective element 120 to the side away from the human eye 400, and multiple dotted lines are coaxially arranged. At this time, the human eye 400 can feel a certain sense of depth when observing the virtual image 300.

[0028] Since the replacement rate of the optical lens 110 is relatively fast, the human eye 400 can observe images at different focal planes, and the number of focal planes corresponds to the number of optical lenses 110. Figure 1 As shown, there are two optical lenses 110, so virtual images 300 can be formed at two target positions after reflection by the optical lens 110 and the first reflective element 120. These virtual images 300 can enhance the three-dimensional visual effect and improve the user's immersion due to their different focal planes.

[0029] Compared to the prior art method of providing an adjustable plane mirror assembly and changing the optical path by adjusting the lens position or angle to achieve image plane displacement, the present application only requires simple mechanical movement to move the optical lens 110 into the incident light path of the image light source. The entire process is compact and easy to adjust. Furthermore, no additional optical components such as a beam splitter are required, reducing manufacturing costs and device size.

[0030] It should be noted that, in one embodiment of the present application, the multi-focal plane modulation assembly 100 further includes a drive mechanism 130, which is drivably connected to each of the plurality of optical lenses 110, and is configured to drive the plurality of optical lenses 110 so as to be replaceably positioned in the incident light path of the image light source. By establishing a drive connection between the drive mechanism 130 and each of the plurality of optical lenses 110, each lens can be independently and precisely controlled.

[0031] Furthermore, in one possible implementation of the present application, Figure 2 、 Figure 3 and Figure 5 As shown, the driving mechanism 130 drives the multiple optical lenses 110 to rotate sequentially around a fixed axis in the incident light path of the image light source. During the high-speed rotation of the driving mechanism 130, the multiple optical lenses 110 can be alternately arranged in the incident light path of the image light source, thereby producing images with different focal planes.

[0032] In a preferred embodiment of the present application, the output end of the drive mechanism 130 is connected to a rotating shaft, so that the drive mechanism 130 can drive the rotating shaft to rotate axially. A lens carrier is mounted on the outer surface of the rotating shaft, and the lens carrier is used to mount the optical lens 110. The rotating shaft can drive the lens carrier and the optical lens 110 mounted thereon to rotate together.

[0033] Optionally, the lens carrier includes multiple mounting surfaces, the number of which corresponds to the number of optical lenses 110, and the shape of the mounting surfaces matches the shape of the optical lenses 110; the optical lenses 110 are arranged in contact with the mounting surfaces. In one embodiment of the present application, there are two optical lenses 110, and correspondingly, the lens carrier includes two mounting surfaces, which face away from each other, so that the two optical lenses 110 can be independently arranged in the incident light path of the image light source, avoiding interference between the multiple optical lenses 110, improving imaging quality and reliability, and also improving the installation stability of the optical lenses 110.

[0034] When the rotating shaft drives the lens carrier and the optical lens 110 to rotate, multiple optical lenses 110 can be arranged in sequence on the optical path along the rotation path. At this time, the image light source can be emitted to the target position through the multiple optical lenses 110 to form multi-focal plane imaging.

[0035] By setting the above-mentioned rotation method, the switching method of the optical lens 110 is made more convenient, reducing the mechanical complexity and cost; and the rotation switching method can reduce space utilization, which is conducive to the miniaturization of the multi-focal plane modulation component 100.

[0036] Furthermore, in another possible implementation of the present application, Figure 1 、 Figure 4 and Figure 6 As shown, the driving mechanism 130 drives the plurality of optical lenses 110 to move linearly back and forth in sequence into the incident light path of the image light source, thereby producing images with different focal planes.

[0037] In a preferred embodiment of the present application, a screw is connected to the output end of the drive mechanism 130, enabling the drive mechanism 130 to drive the screw in axial rotation. The screw's outer wall is provided with multiple turns of external thread; the other end of the screw is penetrated by a lens carrier, which is used to mount the optical lens 110. The holes through which the lens carrier and the screw pass are provided with internal threads that mate with the external threads, enabling the lens carrier to move helically relative to the screw.

[0038] When the drive mechanism 130 drives the screw to rotate axially, the screw and the lens carrier undergo relative motion due to the threaded connection. The lens carrier can then move linearly along the extension direction of the screw, thereby driving the optical lenses 110 mounted on the lens carrier. The drive mechanism 130 controls the rotation direction of the screw to cause the lens carrier to drive the optical lenses 110 in a cyclical reciprocating motion, thereby causing the multiple optical lenses 110 to sequentially translate into the optical path.

[0039] It should be noted that in the specific embodiment of the present application, multiple optical lenses 110 can be arranged on the same lens carrier. Of course, each optical lens 110 can also be arranged on a corresponding lens carrier, and multiple lens carriers are connected to each other. The present application does not impose any restrictions on this, as long as the multiple optical lenses 110 can be translated into the optical path in sequence without interfering with each other.

[0040] By switching the optical lens 110 by translation, the switching of the optical lens 110 is made more convenient, and the mechanical complexity and cost are reduced; and such switching is more stable and reliable.

[0041] Optionally, to further enhance the smoothness of the optical lens 110 switching process, the lens switching mechanism further includes at least one guide rod parallel to the lead screw; one end of the guide rod is fixedly connected to the drive mechanism 130, and the other end slides through the lens carrier. If there are multiple guide rods, the guide rods are spaced apart and parallel to each other. Because the guide rods do not rotate with the drive mechanism 130, they can remain stationary relative to the lens carrier, providing guidance and support for the lens carrier's movement.

[0042] It should be noted that this application does not impose any restrictions on the number of guide rods. To improve the support stability of the lens carrier during movement, preferably, there are two guide rods. The two guide rods are respectively arranged on opposite sides of the lead screw and have a predetermined spacing from the lead screw to avoid interference with the lead screw's rotation process. The two lead screws are used to support the opposite ends of the lead screw.

[0043] Optionally, the lens carrier includes a fixedly connected moving block and a support plate, the screw is threadedly connected to the moving block, and the support plate is arranged on any end face of the moving block; the optical lens 110 is arranged on the side of the support plate away from the moving block.

[0044] Specifically, the number of moving blocks is preferably two, and the two moving blocks are respectively arranged on opposite sides of the plate surface of the support plate. The moving blocks and the support plate are fixedly connected to form a stable frame structure, which enhances the overall rigidity and strength of the lens carrier. In the actual application of the multi-focal plane modulation component 100, for example, when it is applied to a vehicle-mounted HUD, the vehicle will produce bumps and vibrations during driving, so this stable structural design can effectively resist external interference and ensure that the optical lens 110 will not affect the imaging effect due to shaking or deformation during movement. At the same time, the fixed connection method makes the lens carrier more even in transmitting the force when it is subjected to the force of the screw transmission, further improving the structural stability.

[0045] These two drive modes can be flexibly selected based on the specific application scenario requirements. For example, in scenarios where space compactness is extremely important, the rotary drive mode is more advantageous; while in systems where linear motion control is more convenient, the linear drive mode can achieve optimal performance. Of course, in addition to the two drive modes mentioned above, the present application can also use other drive modes to achieve the switching of the optical lens 110, and this application does not impose any restrictions on this.

[0046] The above-mentioned multi-focal plane modulation component 100 can generate images with different focal planes by cyclically switching optical lenses 110 with different focal lengths and / or curvatures in the optical path, thereby solving the defect of a single focal plane in traditional aerial display systems and improving the three-dimensional visual effect; and the lens replacement method does not require a complex driving mechanism 130, only a simple mechanical switching is required, reducing mechanical complexity and cost; at the same time, the number of optical lenses 110 is multiple, and multi-focal plane modulation is achieved without increasing the system volume and cost.

[0047] Another aspect of the present invention provides a multi-focal plane stereoscopic imaging device 200, such as Figure 7 and Figure 8 As shown, it includes an image generating unit 210 and a multi-focal plane modulation component 100; the image generating unit 210 can generate multiple images in a time sequence; the multi-focal plane modulation component 100 includes multiple optical lenses 110 that can be replaced and set synchronously with the image change time sequence, so that each image generated by the image generating unit 210 is emitted through the corresponding optical lens 110; the image generated by the image generating unit 210 is emitted through the corresponding optical lens 110 to multiple target positions that can be observed by the human eye 400 for imaging.

[0048] Specifically, the image generation unit 210 has a control unit inside, which can control the image generation unit 210 to generate different images. The generation sequence of different images is the same as the switching sequence of the multiple optical lenses 110. In other words, every time the optical lens 110 is switched, the image generation unit produces a different image; each image is emitted by the corresponding optical lens 110 to form images at multiple target positions that can be observed by the human eye 400. Similarly, Figure 7 As shown, multiple optical lenses 110 can be rotated around a fixed axis in sequence into the incident light path of the image light source; Figure 8 As shown, multiple optical lenses 110 can also be linearly moved back and forth in sequence into the incident light path of the image light source, thereby producing images with different focal planes.

[0049] The specific structure and beneficial effects of the multi-focal plane modulation assembly 100 have been introduced in detail above and will not be repeated here.

[0050] For example, Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, the multi-focal plane stereoscopic imaging device 200 also includes a second reflective element 220, which is arranged on the light-emitting side of the first reflective element 120 of the multi-focal plane modulation component 100; the image generated by the image generating unit 210 is reflected by the first reflective element 120 to the second reflective element 220, and then emitted by the second reflective element 220 to multiple target positions that can be observed by the human eye 400 for imaging.

[0051] Specifically, the second reflective element 220 can be an existing windshield in automotive or aviation environments, allowing the virtual image to blend naturally with the real environment. For example, in an in-vehicle HUD system, images such as navigation instructions and vehicle speed appear to be directly superimposed on the real road, eliminating the visual disconnection associated with an additional display screen and providing a more immersive and intuitive visual experience.

[0052] The flat, smooth surface of the second reflective element 220 provides excellent optical conditions for image reflection and emission. The image generated by the image generation unit 210 is reflected by the first reflective element 120 onto the second reflective element 220, ensuring image stability and clarity. Even in the event of vehicle turbulence or aircraft flight changes, the fixed mounting method and optical properties of the second reflective element 220 reduce image jitter and distortion, ensuring the driver can always clearly and stably observe the multi-focal virtual image, thereby improving the reliability of information acquisition.

[0053] It should be noted that, in one embodiment of the present application, Figure 9 and Figure 10 As shown, the target position of the image is located between the second reflective element 220 and the human eye 400, and multiple dotted lines are coaxially arranged. The virtual image is presented in a suspended posture, which does not block the real field of view and can naturally blend into the environment while improving the depth and layering of the imaging. Alternatively, in another embodiment of the present application, as Figure 11 and Figure 12As shown, the target position of the image is reflected to the side away from the human eye 400 by the second reflective element 220, and multiple dotted lines are coaxially arranged to create a sense of depth, so that the observer can obtain a visual experience similar to observing a real three-dimensional object when viewing the virtual image 300, further enhancing the stereoscopic display effect.

[0054] The foregoing description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A multi-focal plane modulation component, characterized in that: It comprises a plurality of optical lenses, and the focal lengths and / or curvatures of any two of the optical lenses are different; the plurality of optical lenses are replaceably arranged in the incident light path of the image light source, and the image light source is emitted through the plurality of optical lenses to form images at a plurality of target positions observable by the human eye.

2. The multi-focal plane modulation assembly according to claim 1, characterized in that: The multi-focal plane modulation assembly also includes a driving mechanism, which is respectively connected to the multiple optical lenses and is used to drive the multiple optical lenses to be replaceably arranged in the incident light path of the image light source.

3. The multi-focal plane modulation assembly according to claim 2, characterized in that: The driving mechanism drives the plurality of optical lenses to rotate sequentially around a fixed axis into the incident light path of the image light source.

4. The multi-focal plane modulation assembly according to claim 2, characterized in that: The driving mechanism drives the plurality of optical lenses to linearly reciprocate in sequence into the incident light path of the image light source.

5. The multi-focal plane modulation assembly according to claim 1, characterized in that: The multi-focal plane modulation component also includes a first reflective element arranged on the light-emitting side of the optical lens. After the image light source is incident on the first reflective element through multiple optical lenses, it is emitted by the first reflective element to form images at multiple target positions that can be observed by the human eye.

6. The multi-focal plane modulation assembly according to claim 5, characterized in that: The target position of the image formation is located between the first reflecting element and the human eye; or the target position of the image formation is reflected by the first reflecting element to a side away from the human eye.

7. The multi-focal plane modulation assembly according to any one of claims 1 to 6, characterized in that: The optical lens is a reflector or a lens.

8. A multi-focal plane stereoscopic imaging device, characterized in that: The multi-focal plane modulation assembly comprises an image generating unit and the multi-focal plane modulation assembly according to any one of claims 1 to 7; the image generating unit can generate multiple images in a time sequence; the multi-focal plane modulation assembly comprises multiple optical lenses that can be replaced and arranged synchronously with the time sequence of the image changes, so that each image generated by the image generating unit is emitted through a corresponding optical lens; The image generated by the image generating unit is emitted through the corresponding optical lens to form images at multiple target positions that can be observed by the human eye.

9. The multi-focal plane stereoscopic imaging device according to claim 8, characterized in that: The multi-focal plane stereoscopic imaging device further includes a second reflective element, the multi-focal plane modulation assembly further includes a first reflective element arranged on the light-emitting side of the optical lens, and the second reflective element is arranged on the light-emitting side of the first reflective element; The image generated by the image generating unit is reflected by the first reflecting element to the second reflecting element, and then emitted by the second reflecting element to form images at multiple target positions that can be observed by human eyes.

10. The multi-focal plane stereoscopic imaging device according to claim 9, characterized in that: The target position for the image formation is located between the second reflecting element and the human eye, or the target position for the image formation is reflected by the second reflecting element to a side away from the human eye.

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