Imaging device, head-up display system, and vehicle

Abstract

The application relates to the technical field of optics and discloses an imaging device, a head-up display system and a vehicle, which are used for relieving the problem that in the related art, in order to realize large-scale magnification of an image, the projection distance or the magnification of a curved mirror imaging light path is increased. The imaging device comprises an image output element, a polarization light splitting element and a polarization state conversion assembly. The image output element is used for outputting first polarized light; the polarization light splitting element is arranged on the light output side of the image output element and is used for reflecting the first polarized light and transmitting second polarized light perpendicular to the polarization direction. The polarization state conversion assembly is arranged on one side of the polarization light splitting element, is used for receiving the first polarized light from the polarization light splitting element, converts the first polarized light into second polarized light, and makes the second polarized light shoot towards the polarization light splitting element. The first polarized light is modulated by the polarization light splitting element and the polarization state conversion assembly, so that the light is deflected multiple times, thereby realizing magnification of the image.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 202521081754.4, filed on May 28, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of optical technology, and more particularly to an imaging device, a head-up display system, and a vehicle. Background Technology

[0004] In related technologies, imaging devices typically include an image output element. The light emitted by the image output element is projected onto a specific position after passing through a certain optical path to form an image that can be observed by the user. In order to project a larger image onto the imaging film, it is usually necessary to increase the distance between the image output element and the imaging film (i.e., the projection distance) or increase the magnification of the imaging optical path of the curved mirror, thereby ultimately forming a magnified image.

[0005] However, this method requires a large space to arrange the imaging device and imaging membrane, which limits the use of the imaging device to some extent. Utility Model Content

[0006] This application provides an imaging device, a head-up display system, and a vehicle to at least partially alleviate the problem in related technologies where imaging devices can only achieve large-scale magnification of images by increasing the projection distance or increasing the magnification of the curved mirror imaging optical path.

[0007] To achieve the above objectives, according to a first aspect of this application, an imaging apparatus is provided, comprising an image output element, a polarization beam splitter, and a polarization state conversion component. The image output element outputs first polarized light; the polarization beam splitter is disposed on the light-emitting side of the image output element and is used to reflect the first polarized light and transmit second polarized light, wherein the polarization directions of the first polarized light and the second polarized light are perpendicular. The polarization state conversion component is disposed on one side of the polarization beam splitter and is used to receive the first polarized light from the polarization beam splitter, convert the first polarized light into the second polarized light, and cause the second polarized light to be directed towards the polarization beam splitter.

[0008] Optionally, the imaging device further includes a dimming component disposed on the opposite side of the polarization beam splitter and the polarization state conversion component, the dimming component being used to reflect light from the polarization beam splitter.

[0009] Optionally, the dimming component is further configured to receive second polarized light from the polarization beam splitter and convert the second polarized light into the first polarized light, so that the first polarized light is directed toward the polarization beam splitter.

[0010] Optionally, the dimming assembly includes a first quarter-wave plate and a first reflective element arranged sequentially along a direction away from the polarizing beam splitter.

[0011] Optionally, the extension direction of the dimming component is parallel to the extension direction of the polarization state conversion component.

[0012] Optionally, the extending direction of the dimming component forms an angle with the extending direction of the polarizing beam splitter, and the angle is 45°.

[0013] Optionally, the polarization state conversion component includes a second quarter-wave plate and a second reflective element arranged sequentially along a direction away from the polarization beam splitter.

[0014] Optionally, the imaging device further includes a housing and a spacing adjustment component, wherein at least one of the dimming component and the polarization state conversion component is connected to the housing via the spacing adjustment component, and the spacing adjustment component is used to adjust the spacing between the dimming component and the polarization state conversion component.

[0015] Optionally, the imaging device further includes a housing and a tilt adjustment component connected to the housing, the tilt adjustment component being used to adjust the tilt angle of at least one of the dimming component and the polarization state conversion component.

[0016] According to a second aspect of this application, a head-up display system is provided, the head-up display system including the imaging device described in the first aspect.

[0017] According to a third aspect of this application, a vehicle is provided, the vehicle including the imaging device described in the first aspect or the head-up display system described in the second aspect.

[0018] The imaging device provided in this application modulates the first polarized light from the image output element using a polarization beam splitter and a polarization state conversion component. This causes the light to deflect multiple times within a finite distance, effectively extending the optical path. This achieves further image magnification without increasing the projection distance or the magnification of the curved mirror imaging path, thus realizing a large field of view for the imaging device. Furthermore, the polarization beam splitter can suppress interference from ambient light and stray light, thereby improving the image display effect.

[0019] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0022] Figure 1 This is a schematic diagram of an imaging apparatus and its optical path according to some embodiments of the present disclosure;

[0023] Figure 2 This is a comparison diagram of a first image formed by an imaging apparatus according to some embodiments of the present disclosure and a second image formed directly by an image output element in the related art;

[0024] Figure 3 This is a schematic diagram of an imaging apparatus and its optical path according to other embodiments of the present disclosure;

[0025] Figure 4 This is a comparison diagram of a first image formed by an imaging apparatus according to other embodiments of the present disclosure and a second image formed directly by an image output element in the related art;

[0026] Figure 5 This is a schematic diagram showing the relative positional relationship of a dimming assembly, a housing, a pitch adjustment member, and a tilt adjustment member according to some embodiments of this disclosure;

[0027] Figure 6 This is a schematic diagram showing the relative positional relationship of a dimming component, a spacing adjustment component, and a tilt adjustment component according to some embodiments of this disclosure.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Imaging device; 101. First ray; 102. Second ray;

[0030] 10. Image output components;

[0031] 20. Polarizing beam splitter; 201. First image; 202. Second image;

[0032] 30. Polarization state conversion component; 31. Second quarter-wave plate; 32. Second reflecting element;

[0033] 40. Dimming assembly; 41. First quarter-wave plate; 42. First reflective element; 43. Substrate;

[0034] 50. Outer shell;

[0035] 60. Spacing adjustment parts;

[0036] 70. Tilt adjustment component. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0038] Some embodiments of this application provide an imaging device, such as... Figures 1 to 4 As shown, the imaging device 100 includes: an image output element 10, a polarization beam splitter 20, and a polarization state conversion component 30.

[0039] The polarization beam splitter 20 is disposed on the light-emitting side of the image output element 10 and is used to reflect first polarized light and transmit second polarized light. The first polarized light has a first polarization state, and the second polarized light has a second polarization state. The polarization directions of the first polarized light and the second polarized light are perpendicular.

[0040] The polarization state conversion component 30 is disposed on one side of the polarization beam splitter 20 and is used to receive the first polarized light from the polarization beam splitter 20, convert the first polarized light into the second polarized light, so that the second polarized light is directed toward the polarization beam splitter 20.

[0041] The image output element 10 outputs first polarized light. The polarization beam splitter 20 reflects the first polarized light towards the polarization state conversion component 30. After receiving the first polarized light reflected from the polarization beam splitter 20, the polarization state conversion component 30 converts the first polarized light into second polarized light, which then shines onto the polarization beam splitter 20. After receiving the second polarized light from the polarization state conversion component 30, the polarization beam splitter 20 allows the second polarized light to pass through, thereby ultimately forming the first image 201 viewed by the user.

[0042] Please continue reading. Figures 1 to 4The image output element 10 can output a first ray 101 and a second ray 102, which are related to the field of view of the imaging device 100. Both the first ray 101 and the second ray 102 are first polarized light and are reflected when passing through the polarization beam splitter 20. After reflection and polarization conversion by the polarization state conversion component 30, the first ray 101 forms a ray with a second polarization state (shown in the figure as the first ray 101 is perpendicularly directed towards the polarization state conversion component 30 and returns along the same path). This ray then transmits through the polarization beam splitter 20 and propagates to the location of the first image 201. Similarly, after reflection and polarization conversion by the polarization state conversion component 30, the second ray 102 forms a ray with a second polarization state. This ray then transmits through the polarization beam splitter 20 and propagates to the location of the first image 201. The first polarized light output by the image output element 10, after modulation by the polarization beam splitter 20 and the polarization state conversion component 30, converges at the location of the first image 201 to form an image observable by the user.

[0043] like Figure 2 As shown, if the first light 101 and the second light 102 output by the image output element 10 are directly used for imaging without being modulated by the polarization beam splitter 20 and the polarization state conversion component 30, an upright second image 202 can be formed. At the same projection distance, the size of the second image 202 is smaller than the size of the first image 201. Therefore, for the imaging device 100 provided in this application embodiment, it modulates the first polarized light from the image output element 10 through the polarization beam splitter 20 and the polarization state conversion component 30, causing the light to deflect multiple times within a finite distance, effectively extending the optical path. This achieves further magnification of the image without increasing the projection distance or the magnification of the curved mirror imaging optical path, thereby realizing a large field of view for the imaging device 100. In addition, the polarization beam splitter 20 can also suppress interference from ambient light and stray light, thereby improving the image display effect.

[0044] In some examples, the image output element 10 may include a self-emissive display panel or a liquid crystal display panel. The self-emissive display panel may be an organic light-emitting diode (OLED) display panel or a light-emitting diode (LED) display panel. As an example, the image output element 10 may employ a reflective liquid crystal chip or a tri-color laser light source, etc.

[0045] In some examples, the image output element 10 may also include a polarizer that allows the first polarized light to exit, so that the image output element 10 ultimately outputs the first polarized light.

[0046] In some examples, the image output element 10 may also include a projection lens group, which can modulate the light from the light source in terms of collimation and focusing, thereby achieving a good light output effect. Specifically, the projection lens group may include a collimating lens, a focusing lens, etc. The embodiments of this application do not limit the specific structure of the projection lens group.

[0047] In some examples, the imaging device 100 may also include an imaging film that can present and optimize the projection effect of the first image 201 to enhance the user's viewing experience.

[0048] In some examples, the polarizing beam splitter 20 may include a substrate and a polarizing beam splitter film disposed on one side of the substrate. The polarizing beam splitter film may be a metal wire grid structure, and the substrate may be made of organic or inorganic materials. For example, the substrate may be inorganic glass, thus ensuring both the structural strength and light transmittance of the polarizing beam splitter 20. Furthermore, the polarizing beam splitter film may be formed on the substrate using a coating process.

[0049] In other examples, the polarization beam splitter 20 can be a polarization beam splitter prism, which is formed by bonding two right-angle prisms together. The bonding surface of the two right-angle prisms is provided with a multilayer dielectric film, such as a structure in which titanium dioxide film layers and silicon dioxide film layers are arranged alternately. Of course, the polarization beam splitter 20 can also adopt other structures, as long as it can reflect the first polarized light and transmit the second polarized light.

[0050] In some embodiments, such as Figure 3 and Figure 4 As shown, the polarization state conversion component 30 includes a second quarter-wave plate 31 and a second reflective element 32 arranged sequentially along a direction away from the polarization beam splitter 20.

[0051] By using the second reflecting element 32, the propagation direction of light rays directed towards the polarization state conversion component 30 can be changed, allowing the light rays to pass through the second quarter-wave plate 31 twice, thereby converting the light rays from a first polarization state to a second polarization state. Specifically, the first polarized light is converted into circularly polarized light after passing through the second quarter-wave plate 31 for the first time. The circularly polarized light is then reflected by the second reflecting element 32 and passes through the second quarter-wave plate 31, thus converting into second polarized light.

[0052] By setting the second quarter-wave plate 31 and the second reflective element 32, the structure of the polarization state conversion component 30 can be made relatively simple, which helps to reduce the space occupied by the polarization state conversion component 30, thereby realizing the miniaturization of the imaging device.

[0053] In one implementation, the second quarter-wave plate 31 and the second reflecting element 32 are attached together, which reduces the space occupied by the polarization state conversion component 30. Of course, the second quarter-wave plate 31 and the second reflecting element 32 can also be arranged at intervals, and this embodiment does not limit this.

[0054] In some examples, the second reflective element 32 can be a reflector.

[0055] In some embodiments, please continue reading Figure 3 and Figure 4 The imaging device 100 also includes a dimming component 40 disposed on the opposite side of the polarization beam splitter 20 and the polarization state conversion component 30. The dimming component 40 is used to reflect light from the polarization beam splitter 20.

[0056] This setting allows the dimming component 40 to adjust the light output direction of the imaging device 100, thereby changing the final image position of the imaging device 100 for easier viewing by the user.

[0057] In some examples, the dimming assembly 40 is further configured to receive second polarized light from the polarizing beam splitter 20 and convert the second polarized light into first polarized light, such that the first polarized light is directed toward the polarizing beam splitter 20. Since the polarizing beam splitter 20 is used to reflect the first polarized light, the first polarized light emitted from the dimming assembly 40 is reflected when it passes through the polarizing beam splitter 20 and is used to form the image viewed by the user.

[0058] Specifically, such as Figure 4 As shown, the first light 101 output by the image output element 10 is reflected and polarized after being converted by the polarization state conversion component 30, forming a light ray with a second polarization state (the figure shows the first light ray 101 directed perpendicularly to the polarization state conversion component 30 and returning along the original path). This light ray is then transmitted through the polarization beam splitter 20 and passes through the dimming component 40. After being modulated by the dimming component 40, the light ray is reflected back to the polarization beam splitter 20 and has a first polarization state. The polarization beam splitter 20 reflects the first light ray 101 with the first polarization state and finally propagates to the location of the first image 201. Figure 4The first ray 101, after being transmitted through the polarization beam splitter 20, passes through the dimming assembly 40 (not shown). Furthermore, the second ray 102 output from the image output element 10, after being reflected and polarized by the polarization state conversion assembly 30, forms a ray with a second polarization state. This ray then passes through the polarization beam splitter 20 and the dimming assembly 40. After being modulated by the dimming assembly 40, the ray is reflected back to the polarization beam splitter 20 and has a first polarization state. The polarization beam splitter 20 reflects this second ray 102 with the first polarization state and propagates it to the location of the first image 201. The first polarized light output from the image output element 10, after being modulated by the polarization beam splitter 20, the polarization state conversion assembly 30, and the dimming assembly 40, finally forms an upright first image 201. If the first light ray 101 and the second light ray 102 output by the image output element 10 are directly used for imaging without being modulated by the polarization beam splitter 20, the polarization state conversion component 30, and the dimming component 40, an upright second image 202 can be formed. At the same projection distance, the size of the second image 202 is significantly smaller than the size of the first image 201. Therefore, by using the dimming component 40, the imaging device 100 can ultimately form an upright image, and the size of the image can be effectively magnified. Therefore, by setting the polarization beam splitter 20, the polarization state conversion component 30, and the dimming component 40, this application can effectively increase the field of view of the imaging device 100.

[0059] In some embodiments, please continue reading Figure 3 and Figure 4 The dimming assembly 40 includes a first quarter-wave plate 41 and a first reflective element 42 arranged sequentially along a direction away from the polarizing beam splitter 20.

[0060] By using the first reflecting element 42, the propagation direction of the light rays incident on the dimming assembly 40 can be changed, allowing the light rays to pass through the first quarter-wave plate 41 twice, thereby converting the light rays from a second polarization state to a first polarization state. Specifically, the second polarized light is converted into circularly polarized light after passing through the first quarter-wave plate 41 for the first time. The circularly polarized light is then reflected by the first reflecting element 42 and passes through the first quarter-wave plate 41, thus converting into first polarized light.

[0061] By setting the first quarter-wave plate 41 and the first reflective element 42, the structure of the dimming assembly 40 can be made relatively simple, which helps to reduce the space occupied by the dimming assembly 40, thereby realizing the miniaturization of the imaging device.

[0062] In one implementation, the first quarter-wave plate 41 and the first reflective element 42 are attached together, which reduces the space occupied by the dimming assembly 40. Of course, the first quarter-wave plate 41 and the first reflective element 42 can also be arranged at intervals, and this embodiment does not limit this.

[0063] In some examples, the first reflective element 42 can be a reflector.

[0064] In some embodiments, the extension direction of the dimming component 40 is parallel to the extension direction of the polarization state conversion component 30.

[0065] When the dimming assembly 40 includes a first quarter-wave plate 41 and a first reflective element 42, and the polarization state conversion assembly 30 includes a second quarter-wave plate 31 and a second reflective element 32, the quarter-wave plate and the reflective element are parallel to each other.

[0066] By setting the extension direction of the dimming component 40 parallel to the extension direction of the polarization state conversion component 30, a good light modulation effect can be achieved, thereby ensuring the final imaging effect of the imaging device 100.

[0067] It is worth noting that in related technologies, the distance between the image output element 10 and the second image 202 is the projection distance D1, and the projection ratio (the ratio of the projection distance to the size of the longer side of the projected image) of the image output element 10 is R, with R typically ranging from 1.2 to 1.7. To magnify the second image 202, increasing the projection ratio or the projection distance is commonly used. However, increasing the projection ratio can lead to image distortion, while increasing the projection distance increases the overall size of the imaging device. In this embodiment, assuming the distance between the dimming component 40 and the polarization state conversion component 30 is D2, due to the modulation of light by the polarization beam splitter 20, the polarization state conversion component 30, and the dimming component 40, the equivalent projection distance of the imaging device 100 in this embodiment is D1 + 2 × D2, thereby increasing the size of the projected image of the imaging device 100 by 2 × D2 × R compared to the projected image formed by related technologies. That is, the size of the first image 201 can be increased by 2 × D2 × R compared to the size of the second image 202. Therefore, the embodiments of this application can modulate the light through the polarization beam splitter 20, the polarization state conversion component 30 and the dimming component 40 at the same projection distance, so that the light propagates multiple times within a limited distance, thereby ultimately increasing the size of the projected image.

[0068] In some embodiments, the extending direction of the dimming component 40 forms an angle α with the extending direction of the polarizing beam splitter 20, and the angle α is 45°. By setting the angle α to 45°, it is beneficial to achieve good light propagation.

[0069] In some examples, the angle between the optical axis of the image output element 10 and the extension direction of the polarization beam splitter 20 is 45°, which can effectively improve the reflection or transmission efficiency of the polarization beam splitter 20.

[0070] In some embodiments, such as Figure 5 and Figure 6 As shown, the imaging device 100 also includes a housing 50 and a spacing adjustment member 60. At least one of the dimming component 40 and the polarization state conversion component 30 is connected to the housing 50 through the spacing adjustment member 60. The spacing adjustment member 60 is used to adjust the spacing between the dimming component 40 and the polarization state conversion component 30.

[0071] It is worth noting that, for the sake of simplicity, Figure 5 The image only shows an example of the dimming assembly 40 being connected to the housing 50 via the spacing adjustment member 60. An example of the polarization state conversion assembly 30 being connected to the housing 50 via the spacing adjustment member 60 can be found in [reference needed]. Figure 5 Configure it in this way.

[0072] In this embodiment, by adjusting the distance between the dimming component 40 and the polarization state conversion component 30, the magnification of the first image 201 can be adjusted according to the user's needs, thereby improving the user experience.

[0073] In some examples, the dimming assembly 40 may further include a substrate 43, with a first reflective element 42 and a first quarter-wave plate 41 sequentially disposed on one side of the substrate 43. The substrate 43 is connected to the housing 50 via a spacing adjustment member 60. By arranging the substrate 43 and connecting it to the housing 50 via the spacing adjustment member 60, the influence of the arrangement of the spacing adjustment member 60 on the light output by the image output element 10 can be effectively avoided.

[0074] In one implementation, the spacing adjustment component 60 can be a first bolt, and the substrate 43 has a first threaded hole, with the first bolt engaging with the first threaded hole. By adjusting the depth of the first bolt inserted into the first threaded hole, the spacing between the dimming component 40 and the housing 50 can be adjusted, thereby adjusting the spacing between the dimming component 40 and the polarization state conversion component 30.

[0075] Of course, the spacing adjustment member 60 can also adopt other structures, and this application embodiment does not limit this.

[0076] In some embodiments, please continue reading Figure 5 and Figure 6 The imaging device 100 also includes a housing 50 and a tilt adjustment member 70 connected to the housing 50. The tilt adjustment member 70 is used to adjust the tilt angle of at least one of the dimming assembly 40 and the polarization state conversion assembly 30. The tilt angle refers to the angle of inclination between the extension direction of the dimming assembly 40 or the polarization state conversion assembly 30 and any reference plane.

[0077] It is worth noting that, for the sake of simplicity, Figure 5The image only shows an example of tilt adjustment component 70 adjusting the tilt angle of dimming assembly 40. An example of tilt adjustment component 70 adjusting the tilt angle of polarization state conversion assembly 30 can be found in [reference needed]. Figure 5 Configure it in this way.

[0078] Due to installation precision issues and loose connections, the tilt angles of the polarization conversion component 30 and the dimming component 40 are difficult to guarantee as ideal. Therefore, in this embodiment, the tilt angle of the dimming component 40 or the polarization conversion component 30 can be adjusted using the tilt angle adjustment component 70. This allows the user to adjust the dimming component 40 or the polarization conversion component 30 to a suitable tilt angle according to display needs and to perform position correction on the projected image. For example, the tilt angle adjustment component 70 can be used to adjust the dimming component 40 and the polarization conversion component 30 to a parallel state.

[0079] As an example, in the case where the dimming assembly 40 includes a substrate 43, and the substrate 43 is connected to the housing 50 by a first bolt, the tilt adjustment member 70 may include a plurality of second bolts located around the first bolt. The housing 50 has a second threaded hole, and the second bolts engage with the second threaded hole. One end of each second bolt protrudes from the second threaded hole and abuts against the substrate 43. By adjusting the distance by which a portion of the second bolt protrudes from the second threaded hole, the tilt angle of the dimming assembly 40 can be adjusted.

[0080] Of course, the tilt adjustment component 70 can also adopt other structures, and this application embodiment does not limit this.

[0081] Some embodiments of this application also provide a head-up display system, which includes the imaging device 100 described in any of the above embodiments.

[0082] Since it includes the imaging device 100, the head-up display system has the technical effects of the imaging device 100 described above, which will not be repeated here.

[0083] In some examples, the head-up display system also includes a secondary imaging device. The image projected by the imaging device 100 can be projected onto an imaging film, which can then homogenize the light. The homogenized light continues to be modulated by the secondary imaging device and directed toward the windshield, where it is reflected into the human eye, thus forming a virtual image.

[0084] The secondary imaging device may include multiple mirrors. Specifically, the mirrors may be curved mirrors. The secondary imaging device can magnify the image projected onto the imaging film by a certain magnification, thereby allowing the user to ultimately observe a further magnified image.

[0085] Some embodiments of this application also provide a vehicle that includes the imaging device 100 or head-up display system described in any of the above embodiments.

[0086] Since it includes the imaging device 100, the vehicle has the technical effects of the imaging device 100 described above, which will not be repeated here.

[0087] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0088] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0089] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0090] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0091] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An imaging device, characterized in that, include: Image output element (10) is used to output first polarized light; A polarization beam splitter (20) is disposed on the light-emitting side of the image output element (10) for reflecting the first polarized light and transmitting the second polarized light, wherein the polarization directions of the first polarized light and the second polarized light are perpendicular. as well as A polarization state conversion component (30) is disposed on one side of the polarization beam splitter (20) for receiving the first polarized light from the polarization beam splitter (20), converting the first polarized light into the second polarized light, so that the second polarized light is directed toward the polarization beam splitter (20).

2. The imaging device according to claim 1, characterized in that, The imaging device (100) further includes a dimming component (40) disposed on the opposite side of the polarization beam splitter (20) and the polarization state conversion component (30), the dimming component (40) being used to reflect light from the polarization beam splitter (20).

3. The imaging device according to claim 2, characterized in that, The dimming component (40) is also used to receive second polarized light from the polarization beam splitter (20) and convert the second polarized light into the first polarized light, so that the first polarized light is directed toward the polarization beam splitter (20).

4. The imaging device according to claim 3, characterized in that, The dimming assembly (40) includes a first quarter-wave plate (41) and a first reflective element (42) arranged sequentially in a direction away from the polarizing beam splitter (20).

5. The imaging device according to claim 3, characterized in that, The extension direction of the dimming component (40) is parallel to the extension direction of the polarization state conversion component (30).

6. The imaging device according to claim 5, characterized in that, The extension direction of the dimming component (40) is at an angle of 45° to the extension direction of the polarizing beam splitter (20).

7. The imaging apparatus according to any one of claims 1-6, characterized in that, The polarization state conversion component (30) includes a second quarter-wave plate (31) and a second reflective element (32) arranged sequentially in a direction away from the polarization beam splitter (20).

8. The imaging apparatus according to any one of claims 2-6, characterized in that, The imaging device (100) further includes a housing (50) and a spacing adjustment member (60). At least one of the dimming component (40) and the polarization conversion component (30) is connected to the housing (50) via the spacing adjustment member (60). The spacing adjustment member (60) is used to adjust the spacing between the dimming component (40) and the polarization conversion component (30); and / or The imaging device (100) further includes a housing (50) and a tilt adjustment member (70) connected to the housing (50), the tilt adjustment member (70) being used to adjust the tilt angle of at least one of the dimming assembly (40) and the polarization state conversion assembly (30).

9. A head-up display system, characterized in that, The imaging apparatus includes any one of claims 1-8.

10. A vehicle, characterized in that, It includes the imaging device according to any one of claims 1-8 or the head-up display system according to claim 9.

Images