Polarization assembly and camera module with polarization assembly

Abstract

The application provides a polarizing assembly and a camera module with the polarizing assembly, wherein the polarizing assembly comprises a base, a polarizing mechanism and at least one driving mechanism, wherein the base is provided with a containing space; the polarizing mechanism is rotatably arranged in the containing space of the base; the at least one driving mechanism is connected with the polarizing mechanism, the driving mechanism comprises a piezoelectric element and an iron ring, the iron ring is arranged on the support of the polarizing mechanism, the piezoelectric element is connected with the iron ring, and the piezoelectric element and the iron ring are in a pre-tightening and pressing state; when the piezoelectric element is electrically conducted, the friction force generated between the piezoelectric element and the iron ring drives the polarizing mechanism to move, so as to change the polarization direction of the polarizing assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical technology, and in particular to a polarization assembly and a camera module with the polarization assembly. BACKGROUND

[0002] The camera module is one of the necessary components in electronic terminals for taking pictures. The imaging requirements of the camera module are getting higher and higher, and the parameter adjustment for different shooting environments is also considered to achieve high-quality image shooting. The brightness of the image shot by the camera module is related to the exposure of the image, and the exposure of the image is related to the light amount of the camera. However, whether the brightness of the image is too high or too low, it will affect the definition of the image.

[0003] The polarizer has the functions of shielding and transmitting incident light, and is widely used in camera shooting, especially in outdoor shooting. It can filter reflected light, increase imaging contrast, effectively reduce or eliminate the reflection of non-metal surfaces, and effectively improve the saturation of colors and contrast.

[0004] In camera shooting, the polarizer is installed and screwed on the lens. By manually rotating the upper ring, the angle of light entering the camera is changed to eliminate the reflection of objects and increase the saturation of the photo. For example, in landscape photography, it is often used to show the texture of objects with strong reflection, highlight the scenery behind the glass, darken the sky, and show the blue sky and white clouds. For example, shooting objects in water and objects in a showcase makes the shooting objects clearer. In addition, shooting plants with a lot of water, the leaf reflection, and the polarization make the leaves greener. However, the polarizer is not needed in every scene. In dark light conditions, the presence of the polarizer will make the image dark and affect the picture quality. In addition, the manual rotation adjustment of the angle of the polarizer also increases the difficulty of using the polarizer.

[0005] In the prior art, the application of the polarizing mirror in the camera lens still cannot meet the requirements. Not only does it need to be selected according to the scene whether to use the polarizing mirror, but also the polarization direction of the polarizing mirror needs to be considered to obtain good shooting effect. In addition, the addition of the polarizer inevitably increases the overall height of the module, which cannot meet the requirements of miniaturization and thinness of mobile electronic devices. SUMMARY

[0006] One of the main advantages of the present application is to provide a polarization assembly and a camera module with the polarization assembly, wherein the polarization assembly is arranged in front of the lens assembly of the camera module. According to the shooting environment and the image information feedback, it is judged whether to use the polarization structure, and according to the actual image information, the phase of the polarizer is adjusted, and then the unnecessary light is filtered, so that the imaging saturation is better.

[0007] Another advantage of the present application is to provide a polarizing assembly and a camera module with the polarizing assembly, wherein when the camera module captures an image, by analyzing information of a plurality of feature areas in the image, it is determined whether the polarizing element is needed and the deflection angle of the polarizing element, the polarizing element is moved and rotated, and a second image is captured to obtain a good shooting effect.

[0008] Another advantage of the present application is to provide a polarizing assembly and a camera module with the polarizing assembly, wherein the polarizing assembly comprises a polarizing mirror and a driving mechanism capable of driving the polarizing mirror to rotate, and the driving mechanism is a piezoelectric element, which is beneficial to simplify the overall structure of the camera module.

[0009] Another advantage of the present application is to provide a polarizing assembly and a camera module with the polarizing assembly, wherein the driving mechanism of the polarizing assembly is arranged on the outer peripheral side of the polarizing mirror, which is beneficial to reduce the overall height of the polarizing assembly and realize the miniaturization and lightness of the camera module.

[0010] According to an aspect of the present application, a polarizing assembly capable of achieving the foregoing and other objects and advantages comprises:

[0011] a base, the base being provided with a containing space;

[0012] a polarizing mechanism, wherein the polarizing mechanism is rotatably arranged in the containing space of the base; and

[0013] at least one driving mechanism, wherein the at least one driving mechanism is connected with the polarizing mechanism, the driving mechanism comprises a piezoelectric element and an iron ring, wherein the iron ring is arranged on the support of the polarizing mechanism, the piezoelectric element is connected with the iron ring, and the piezoelectric element and the iron ring are in a pre-tightened and compressed state, when the piezoelectric element is electrically conducted, the frictional force generated between the piezoelectric element and the iron ring drives the polarizing mechanism to move, so as to change the polarization direction of the polarizing assembly.

[0014] According to an embodiment of the present application, the polarizing mechanism of the polarizing assembly comprises a polarizing mirror and a support supporting the polarizing mirror, wherein the polarizing mirror is fixed to the support, the support is connected with the driving mechanism, and the driving mechanism drives the polarizing mirror to move through the support.

[0015] According to an embodiment of the present application, the support comprises a support body and a support through hole formed in the support body, wherein the polarizing mirror is fixed to the support body, and the direction of the central axis of the polarizing mirror is parallel to the direction of the central axis of the support through hole.

[0016] According to an embodiment of the present application, the iron ring is arranged on the outer side of the support, and the iron ring has a ring structure.

[0017] According to an embodiment of the present application, the piezoelectric element is fixed on the base, and the piezoelectric element is directly opposite to the iron ring.

[0018] According to an embodiment of the present application, the driving mechanism further comprises a spring, wherein the spring is arranged on the base, the spring is located outside the piezoelectric element, and the spring is in a compressed pre-tightened state, which provides pre-tightening pressure for the piezoelectric element.

[0019] According to an embodiment of the present application, the base comprises a base substrate and a base wall formed on the base substrate, the base substrate and the base wall form the accommodating space, and the polarizing mechanism is rotatably arranged in the accommodating space of the base.

[0020] According to an embodiment of the present application, the base is further provided with at least one mounting groove, wherein the piezoelectric element and the spring are mounted in the mounting groove of the base.

[0021] According to an embodiment of the present application, the polarizing assembly further comprises a supporting mechanism arranged between the base and the polarizing mechanism for supporting the polarizing mechanism, and the supporting mechanism comprises at least three supporting units, wherein the at least three supporting units are arranged on the base, and the at least three supporting units support the bracket of the polarizing mechanism above the base.

[0022] According to an embodiment of the present application, the at least three supporting units of the supporting mechanism are configured as steel balls, wherein the supporting units are rollably arranged between the bracket of the polarizing mechanism and the base, and at least three accommodating grooves for accommodating the supporting mechanism are arranged between the base and the bracket.

[0023] According to an embodiment of the present application, further comprising a circuit board, wherein the circuit board is electrically connected to the piezoelectric element of the driving mechanism.

[0024] According to an embodiment of the present application, further comprising a shell, wherein the shell is arranged above the base, the polarizing mechanism and the driving mechanism, the shell is buckled above the base, the shell comprises a shell body and a side wall integrally extended downward from the outer edge of the shell body, the inner side of the side wall of the shell is close to the base wall of the base, the spring of the driving mechanism is arranged between the side wall of the shell and the base wall, and the spring is in a pre-tightened compressed state between the side wall and the base wall.

[0025] According to another aspect of the present application, the present application further provides a camera module, comprising:

[0026] a photosensitive component;

[0027] a lens assembly; and

[0028] The polarizing assembly according to any one of the above, wherein the lens assembly and the polarizing assembly are arranged at a front end of the photosensitive component along a photosensitive path of the photosensitive component, and the polarizing assembly is located at a front end of the lens assembly in a light incident direction.

[0029] Further objects and advantages of the present application will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings.

[0030] These and other objects, features and advantages of the present application will become apparent from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0031] The technical solutions of the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the drawings, the same reference signs are used to represent the same components unless otherwise specified. Among them:

[0032] Figure 1 is a schematic diagram of the overall structure of a camera module according to a first preferred embodiment of the present application.

[0033] Figure 2 is a schematic diagram of the structure of a polarizing assembly of the camera module according to the above first preferred embodiment of the present application.

[0034] Figure 3 is an exploded schematic diagram of the polarizing assembly according to the above first preferred embodiment of the present application.

[0035] Figure 4 is a sectional view of the polarizing assembly according to the above first preferred embodiment of the present application. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments shown in the drawings are only used as examples to specifically and concretely explain and illustrate the concept of the present application, and neither necessarily have to be drawn in proportion in terms of size and structure, nor constitute a limitation on the concept of the present application.

[0037] In this specification, the orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the configuration shown in each drawing, and they are relative concepts, so they can be changed accordingly depending on the different positions, different use states, etc. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0038] Refer to the accompanying drawings of this application specification Figures 1 to 4 As shown, a polarization component and a camera module with a polarization component according to the first preferred embodiment of the present application are explained in the following description. The camera module includes a photosensitive component 10, a lens component 20, and a polarization component 30 arranged at the light incident end of the lens component 20, wherein the lens component 20 is arranged on the photosensitive side of the photosensitive component 10 along the optical axis direction of the photosensitive component 10. The camera module is suitable for mobile electronic devices, such as mobile phones, wearable smart devices, etc., and determines whether to use a polarization structure according to the shooting environment and image information feedback during shooting, and adjusts the phase of the polarizer according to the actual image information, thereby filtering out unnecessary light to make the imaging saturation better.

[0039] The polarization component 30 is located at the front end of the lens assembly 20 in the light incident direction, that is, the light incident on the camera module passes through the polarization component 30 and the lens assembly 20 in sequence before reaching the photosensitive component 10. The polarization component 30 is provided with a light hole 302 for incident light to pass through. The incident light from the outside passes through the light hole 302 of the polarization component 30 and then passes through the lens assembly 20 to reach the photosensitive component 10.

[0040] The polarization assembly 30 includes a base 31, a polarizing mechanism 32 disposed on the base 31, and at least one driving mechanism 33. The base 31 has a receiving space 301, and the polarizing mechanism 32 and the at least one driving mechanism 33 are disposed in the receiving space 301 of the base 31. The driving mechanism 33 is disposed on the base 31 and is connected to the polarizing mechanism 32. The driving mechanism 33 can drive the polarizing mechanism 32 to move based on the base 31 to adjust the polarization direction of the polarization assembly 30.

[0041] The polarizing mechanism 32 of the polarization component 30 includes a polarizer 321 and a bracket 322 supporting the polarizer 321, wherein the polarizer 321 is fixed to the bracket 322, and the bracket 322 is connected to the driving mechanism 33. The driving mechanism 33 drives the polarizer 321 to move through the bracket 322 to adjust the polarization direction of the polarization component 30.

[0042] The polarizer 321 is supported by the bracket 322 at the light hole 302 of the polarization component 30. Incident light enters the polarizer 321 through the light hole 302 of the polarization component 30. The polarizer 321 selectively blocks or transmits the incident light at a specific angle.

[0043] The bracket 322 comprises a bracket body 3221 and a bracket through hole 3222 formed in the bracket body 3221, wherein the polarizer 321 is fixed on the bracket body 3221, and the direction of the central axis of the polarizer 321 is substantially parallel to the direction of the central axis of the bracket through hole 3222. The bracket body 3221 of the bracket 322 has an incident light side surface and an outgoing light side surface, and preferably, in the preferred embodiment of the present application, the polarizer 321 is fixed on the incident light side surface of the bracket 322. Alternatively, in another optional embodiment of the present application, the polarizer 321 is fixed in the bracket through hole 3222 of the bracket 322.

[0044] The bracket 322 carries the polarizer 321 and drives the polarizer 321 to move in a specific direction when the driving mechanism 33 is driven, so as to adjust the polarization angle of the polarizer 321. In the preferred embodiment of the present application, the bracket 322 is rotatably arranged in the accommodating space 301 of the base 31, and the driving mechanism 33 can drive the bracket 322 and the polarizer 321 arranged on the bracket 322 to rotate in a specific direction in the accommodating space 301 of the base 31, so as to adjust the polarization direction of the incident light incident on the polarization assembly.

[0045] The driving mechanism 33 comprises at least one piezoelectric element 331 and an iron ring 332 opposite to the at least one piezoelectric element 331, wherein the piezoelectric element 331 is arranged on the base 31, the iron ring 332 is connected with the bracket 322, and the iron ring and the piezoelectric element 321 are in a pre-tightened and compressed state. When the piezoelectric element 331 is electrically conducted, the piezoelectric element 331 and the iron ring 332 are tightly attached and generate a friction force, and the piezoelectric element 331 drives the iron ring 332 to rotate in a specific direction.

[0046] In the example, in the preferred embodiment of the present application, the iron ring 332 is arranged on the outside of the bracket 322, and the iron ring 332 has a ring structure. As preferred, in the preferred embodiment of the present application, the iron ring 332 is attached to the outside of the bracket 322.

[0047] The piezoelectric element 331 is fixed on the base 31, and the piezoelectric element 331 and the iron ring 332 are directly opposite. When the piezoelectric element 331 is electrically conducted, the piezoelectric element 331 generates resonance, and the piezoelectric element 331 and the iron ring 332 generate movement by mutual extrusion. As preferred, in the preferred embodiment of the present application, the piezoelectric element 331 is located on the outside or the inside of the ring structure of the iron ring 332.

[0048] The driving mechanism 33 further comprises a spring 333, wherein the spring 333 is arranged on the base 31, the spring 333 is located outside the piezoelectric element 331, and the spring 333 is in a compressed pre-tightening state, which provides pre-tightening pressure for the piezoelectric element 331, so that the piezoelectric element 331 and the iron ring 332 are only attached, thereby improving the friction between the piezoelectric element 331 and the iron ring 332 of the driving mechanism 33.

[0049] The spring 333 is a metal spring or an elastic element such as a spring, which is arranged outside the piezoelectric element 331, and the spring 333 is in a compressed pre-tightening state outside the piezoelectric element 331, which provides pressure for the piezoelectric element 331 and the iron ring 331, so that when the piezoelectric element 331 is electrically conducted, the friction between the piezoelectric element 331 and the iron ring 322 drives the iron ring 332 to move.

[0050] The base 31 carries and supports the driving mechanism 33 and the polarizing mechanism 32, wherein the base 31 comprises a base substrate 311 and a base wall 312 formed on the base substrate 311, the base substrate 311 and the base wall 312 form the accommodation space 301, and the driving mechanism 33 and the polarizing mechanism 32 are arranged in the accommodation space 301 of the base 31.

[0051] The accommodation space 301 formed by the base wall 312 of the base 31 is in a cylindrical shape, and the base wall 312 integrally extends upward from the base substrate 311 along the axial direction of the accommodation space 301. The polarizing mechanism 32 is rotatably arranged in the accommodation space 301 of the base 31, and the support 322 of the polarizing mechanism 32 and the iron ring 332 of the driving mechanism 33 are limited by the base wall 312 of the base 31 to prevent the polarizing mirror 321 from being deflected. That is, the support 322 of the polarizing mechanism 32 and the iron ring 332 of the driving mechanism 33 are supported by the base substrate 311 of the base 31 and held in the accommodation space 301 by the base wall 312.

[0052] The piezoelectric element 331 of the driving mechanism 33 is disposed on the base wall 312 of the base 31. The base 31 is further provided with at least one mounting groove 313, wherein the piezoelectric element 331 and the elastic sheet 333 are mounted in the mounting groove 313 of the base 31. Preferably, in the preferred embodiment of the present application, the mounting groove 313 is formed on one side of the base wall 312 of the base 31, and the mounting groove 313 communicates the inner side and the outer side of the base wall 312, or the mounting groove 313 is formed on the inner side of the base wall 312.

[0053] The base 31 further comprises a plurality of bosses 314, wherein the bosses 314 are located above the base substrate 311 and on the inner side of the base wall 312. The support 322 of the polarizing mechanism 32 is disposed above the bosses 314 of the base 31, and the support 322 of the polarizing mechanism 32 is supported by the bosses 314.

[0054] It should be noted that the bosses 314 of the base 31 protrude upward from the base substrate 311, and the bosses 314 of the base 31 are of an integral structure with the base substrate 311.

[0055] The polarizing assembly 30 further comprises a support mechanism 34 disposed between the base 31 and the polarizing mechanism 32 for supporting the polarizing mechanism 32, allowing the polarizing mechanism 32 to rotate in a specific direction in the accommodation space 301 when the driving mechanism 33 drives the polarizing mechanism 32 to move.

[0056] The support mechanism 34 comprises at least three support units 341, wherein the at least three support units 341 are disposed on the base 31, and the at least three support units 341 support the support 322 of the polarizing mechanism 32 above the bosses 314. That is, in the preferred embodiment of the present application, the polarizing mechanism 32 is supported by the at least three support units 341 above the bosses 341, avoiding the friction between the support 322 of the polarizing mechanism 32 and the bosses 341.

[0057] The at least three support units 341 of the support mechanism 34 are configured as steel balls, wherein the support units 341 are rollably disposed between the support 322 of the polarizing mechanism 32 and the base 31.

[0058] Correspondingly, at least three accommodating grooves 315 for accommodating the support mechanism 34 are arranged between the base 31 and the bracket 322. Preferably, in the preferred embodiment of the present application, the at least three accommodating grooves 315 are formed on the upper surface of the boss 314 of the base 31. Alternatively, in another optional embodiment of the present application, the at least three accommodating grooves 315 are formed on the lower surface of the bracket 322.

[0059] It can be understood that the support unit 341 of the support mechanism 34 of the polarization assembly 30 supports the movement of the polarizing mechanism 32 in the accommodating space 301 in a rolling manner. When the piezoelectric element 331 of the driving mechanism 33 is electrically conducted, the friction between the piezoelectric element 331 and the iron ring 332 drives the bracket 322 of the polarizing mechanism 32 to rotate in a specific direction, and the bracket 322 of the polarizing mechanism 32 drives the polarizing mirror 321 to rotate synchronously, thereby changing the polarization direction of the polarizing mirror 321.

[0060] The polarization assembly 30 further comprises a circuit board 35, wherein the circuit board 35 is electrically connected with the piezoelectric element 321 of the driving mechanism 33, and the circuit board 35 provides the driving mechanism 33 with the electrical energy required for operation.

[0061] The circuit board 35 of the polarization assembly 30 is arranged below the base 31. It is worth mentioning that, in the preferred embodiment of the present application, the circuit board 35 is connected with the circuit board of the camera module, and when the camera module needs to adjust the polarization direction of the polarization assembly 30, the circuit board of the camera module electrically conducts the driving mechanism 32 through the circuit board 35.

[0062] The polarization assembly 30 further comprises a housing 36, wherein the housing 36 is arranged above the base 31, the polarizing mechanism 32 and the driving mechanism 33, and the housing 36 is buckled above the base 31. The housing 36 comprises a housing body 361 and a side wall 362 integrally extended downward from the outer edge of the housing body 361, wherein the housing body 361 covers the polarizing mechanism 32 and the driving mechanism 33 to prevent dust from entering the accommodating space 301. The side wall 362 of the housing 36 is buckled on the outer edge of the base wall 312 of the base 31.

[0063] The inner side of the side wall 362 of the housing 36 is close to the base wall 312 of the base 31, and the elastic sheet 333 of the driving mechanism 33 is arranged between the side wall 362 of the housing 36 and the base wall 312, and the elastic sheet 333 is in a pre-tightened and compressed state between the side wall 362 and the base wall 312.

[0064] As shown in Figure 4 When it is necessary to adjust the polarization direction of the polarization assembly 30 of the camera module, the circuit board 35 of the polarization assembly 30 is electrically connected to the driving mechanism 33, the elastic sheet 333 of the driving mechanism 33 is between the shell 36 and the base 31, is in a pressed state, and the elastic sheet 333 provides pre-tightening pressure for the piezoelectric element 331 and the iron ring 332 of the driving mechanism 33. The piezoelectric element 331 is electrically connected, and a friction force in the circumferential direction is generated between the piezoelectric element 331 and the iron ring 332 opposite to the piezoelectric element 331, that is, the piezoelectric element 331 drives the iron ring 332 to rotate in the circumferential direction, and the iron ring 332 is attached to the outside of the support 322 of the polarizing mechanism 32. Therefore, the iron ring 332 drives the support 322 of the polarizing mechanism 32 to rotate synchronously, wherein the support 322 drives the polarizing mirror 321 to rotate, and the polarization direction of the polarization assembly 30 is adjusted.

[0065] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes all belong to the protection scope of the present application.

Claims

1. A polarization component, characterized in that include: A base, wherein the base is provided with an accommodating space; a polarizing mechanism, wherein the polarizing mechanism is rotatably disposed in the accommodating space of the base; as well as At least one driving mechanism, wherein the at least one driving mechanism is connected to the polarizing mechanism, the driving mechanism includes a piezoelectric element and an iron ring, wherein the iron ring is arranged in the polarizing mechanism, the piezoelectric element is connected to the iron ring, and the piezoelectric element and the iron ring are in a pre-tightened and compressed state. When the piezoelectric element is electrically conductive, the friction force generated between the piezoelectric element and the iron ring drives the polarizing mechanism to move to change the polarization direction of the polarization component.

2. The polarization component according to claim 1, wherein the polarization mechanism of the polarization component includes a polarizer and a bracket supporting the polarizer, wherein the polarizer is fixed to the bracket, the bracket is connected to the driving mechanism, and the driving mechanism drives the polarizer to move through the bracket.

3. The polarization component according to claim 2, wherein the bracket includes a bracket body and a bracket through hole formed in the bracket body, wherein the polarizer is fixed to the bracket body, and the direction of the central axis of the polarizer is parallel to the direction of the central axis of the bracket through hole. 4 . The polarization assembly according to claim 3 , wherein the iron ring is arranged on the outside of the bracket, and the iron ring has a ring-shaped structure. 5 . The polarization assembly according to claim 4 , wherein the piezoelectric element is fixed to the base, and the piezoelectric element is directly opposite to the iron ring.

6. The polarization component according to any one of claims 2 to 5, wherein the driving mechanism further comprises a spring, wherein the spring is arranged on the base, the spring is located on the outside of the piezoelectric element, and the spring is in a compressed pre-tightened state, which provides pre-tightening pressure for the piezoelectric element.

7. The polarization component according to claim 6, wherein the base comprises a base substrate and a base wall formed on the base substrate, the base substrate and the base wall form the accommodating space, and the polarizing mechanism is rotatably arranged in the accommodating space of the base. 8 . The polarization assembly according to claim 7 , wherein the base is further provided with at least one mounting groove, wherein the piezoelectric element and the elastic sheet are mounted in the mounting groove of the base.

9. The polarization component according to claim 8, wherein the polarization component further comprises a supporting mechanism, wherein the supporting mechanism is arranged between the base and the polarization mechanism, and is used to support the polarization mechanism, wherein the supporting mechanism comprises at least three supporting units, wherein the at least three supporting units are arranged on the base, and the bracket of the at least three supporting units supporting the polarization mechanism is located above the base.

10. The polarization assembly according to claim 9, wherein the at least three support units of the support mechanism are constructed as steel balls, wherein the support units are rollably arranged between the bracket and the base of the polarization mechanism, and at least three accommodating grooves for accommodating the support mechanism are provided between the base and the bracket.

11. The polarization assembly according to claim 10, further comprising a circuit board, wherein the circuit board is electrically connected to the piezoelectric element of the driving mechanism.

12. The polarization component according to claim 11 further includes a shell, wherein the shell is arranged above the base, the polarizing mechanism and the driving mechanism, and the shell is buckled above the base, the shell includes a shell body and a side wall extending downward from the outer edge of the shell body, the inner side of the side wall of the shell is close to the base wall of the base, and the spring clip of the driving mechanism is arranged between the side wall of the shell and the base wall, and the spring clip is in a pre-tightened and compressed state between the side wall and the base wall.

13. A camera module, characterized in that: include: Photosensitive components; lens assembly; as well as A polarization component as described in any one of claims 1 to 12, wherein the lens assembly and the polarization assembly are arranged at the front end of the photosensitive assembly along the light sensing path of the photosensitive assembly, and the polarization assembly is located at the front end of the light incident direction of the lens assembly.

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