Light polarization assembly and image acquisition equipment

Abstract

The utility model relates to the technical field of optical assembly, and discloses a light polarization assembly and image acquisition equipment, the light polarization assembly comprises a light-transmitting substrate, a light blocking layer is arranged on a part of the inner side surface of the light-transmitting substrate, and a light-transmitting part is formed on the part, not provided with the light blocking layer, of the light-transmitting substrate; the polaroid is arranged on the inner side face, away from the light-transmitting base body, of the light blocking layer in a straight shape and covers the light-transmitting part. In this way, the product attractiveness can be improved, and the polarization effect is guaranteed.

Description

Technical Field

[0001] This application relates to the field of optical assembly technology, specifically to an optical polarization component and an image acquisition device. Background Technology

[0002] In image acquisition equipment, supplementary lighting sources are typically designed to improve image brightness and quality in low-light environments, illuminating the shooting area or object. In this case, when the shooting area or object has a smooth, highly reflective surface, a large amount of the supplementary light will enter the lens after being reflected by the highly reflective surface, resulting in overexposure of the image.

[0003] To address this, two mutually orthogonal polarizers, namely a polarizer and an analyzer, can be placed in the light output path of the supplementary light source and the light receiving path of the lens, respectively. The polarizers' ability to block and filter specific light rays can be used to prevent overexposure of the image.

[0004] As for the assembly of polarizers, most currently, polarizers with self-adhesive backing are directly pasted onto the outer surface of the product at the light-emitting position of the supplementary light source and the light-receiving position of the lens assembly. This method not only affects the aesthetics of the product, but also, because the polarizer is directly exposed to the outside world, it is easily affected by the environment, resulting in defects such as dirt, scratches, and damage, which may in turn affect the polarization effect. Utility Model Content

[0005] In view of the above problems, this application provides an optical polarization component and an image acquisition device, which can improve the aesthetics of the product and ensure the polarization effect.

[0006] According to one aspect of the embodiments of this application, a light polarization component is provided, comprising: a light-transmitting substrate, wherein a light-blocking layer is disposed on a portion of the inner side surface of the light-transmitting substrate, and a portion of the light-transmitting substrate without the light-blocking layer forms a light-transmitting portion; and a polarizer, which is disposed in a straight line on the inner side surface of the light-blocking layer away from the light-transmitting substrate and covers the light-transmitting portion.

[0007] In one alternative approach, the light-blocking layer is a screen-printed layer.

[0008] In one alternative, the polarizer and the light-blocking layer are bonded together by an adhesive backing layer.

[0009] In one alternative approach, the light-transmitting substrate is protective glass.

[0010] According to another aspect of the embodiments of this application, an image acquisition device is provided, including a housing, a supplementary light source, a lens assembly, and a light polarization component as described above. The light polarization component is embedded in the housing, and the supplementary light source and the lens assembly are both disposed inside the housing and face the light-transmitting portion on the light-transmitting substrate.

[0011] In one alternative embodiment, the light-transmitting portion includes a first light-transmitting portion and a second light-transmitting portion, and the polarizer includes a first polarizer and a second polarizer. The first polarizer covers the first light-transmitting portion, and the second polarizer covers the second light-transmitting portion. The polarization direction of the first polarizer is at a 90-degree angle to the polarization direction of the second polarizer. The supplementary light source is disposed toward the first light-transmitting portion, and the lens assembly is disposed toward the second light-transmitting portion.

[0012] In one alternative embodiment, the supplementary light source includes a first light source and a second light source, with the first light source disposed toward the first light-transmitting portion; the light-transmitting portion further includes a third light-transmitting portion, which is not covered by the polarizer, and the second light source is disposed toward the third light-transmitting portion.

[0013] In one alternative configuration, the first light-transmitting portion and the third light-transmitting portion are located on opposite sides of the second light-transmitting portion.

[0014] In one alternative embodiment, the supplementary light source comprises a plurality of light-emitting units arranged in an array.

[0015] In one alternative approach, the image acquisition device is a barcode reader.

[0016] The optical polarization component provided in this application embodiment exhibits a consistent color throughout the light-transmitting portion, with no color difference between the center and edges, resulting in a neat and aesthetically pleasing appearance. Furthermore, in the optical polarization component provided in this application embodiment, both the light-blocking layer and the polarizer are disposed on the inner surface of the light-transmitting substrate. Both are better protected by the light-transmitting substrate, preventing defects such as dirt and scratches, and ensuring the polarization effect. Moreover, since the polarizer covers the light-transmitting portion and is disposed on the inner surface of the light-blocking layer, the edge where the polarizer connects to the light-blocking layer is obscured by the light-blocking layer when viewed from the outside of the light-transmitting substrate, further ensuring the overall aesthetic appeal of the product.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0019] Figure 1 This is a schematic diagram of a cross-sectional structure in the prior art where a polarizer is directly attached to the outer surface of a light-transmitting substrate;

[0020] Figure 2 A cross-sectional diagram showing a polarizer attached to the inner side of a light-transmitting substrate and a light-blocking layer disposed on the outer side.

[0021] Figure 3 A cross-sectional structural diagram showing that both the light-blocking layer and the polarizer are disposed inside the light-transmitting substrate, and the polarizer is simultaneously attached to both the light-transmitting part and the light-blocking layer.

[0022] Figure 4 A schematic diagram of a cross-sectional structure in which both the light-blocking layer and the polarizer are located inside the light-transmitting substrate, and the polarizer is only attached to the inner side of the light-transmitting part.

[0023] Figure 5 A cross-sectional structural diagram of the optical polarization component provided in an embodiment of this application;

[0024] Figure 6 This is a front view of the image acquisition device provided in the embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the inner structure of the optical polarization component in the image acquisition device provided in the embodiments of this application.

[0026] The reference numerals in the detailed embodiments are as follows:

[0027] exist Figures 1 to 4 middle:

[0028] 11. Transparent substrate; 12. Light-blocking layer; 13. Transparent part; 14. Polarizing film; 15. Adhesive backing layer; 16. Stepped part; 17. Void; 18. Gap;

[0029] Figures 5 to 7 middle:

[0030] 100. Optical polarization components;

[0031] 110. Transparent substrate; 111. Light-blocking layer; 112. Transparent portion; 1121. First transparent portion; 1122. Second transparent portion; 1123. Third transparent portion;

[0032] 120. Polarizer; 121. First polarizer; 122. Second polarizer;

[0033] 130. Adhesive backing layer;

[0034] 200, Housing; 300, Supplemental light source; 310, First light source; 320, Second light source; 400, Lens assembly; 500, Image acquisition device. Detailed Implementation

[0035] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0040] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0041] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] Polarizers allow only linearly polarized light with the same polarization direction to pass through. By placing two orthogonal polarizers—a polarizer and an analyzer—in the output optical path of the supplementary lighting source and the receiving optical path of the lens, the linearly polarized light emitted from the supplementary lighting source and filtered by the polarizer, after illuminating the strongly reflective surface of the shooting area or object and being specularly reflected back into the receiving optical path, is blocked by the analyzer because its polarization direction is perpendicular to that of the analyzer and thus does not enter the lens. Meanwhile, light diffusely reflected from the surface of the object forms unpolarized light. This unpolarized light enters the receiving optical path and is filtered by the analyzer, allowing light with the same polarization direction as the analyzer to pass through while blocking light with other polarization directions. This achieves illumination and imaging while preventing overexposure of the image.

[0044] Existing technologies use self-adhesive polarizing sheets that are directly adhered to the outer surface of the product, such as... Figure 1 As shown in the cross-sectional structure, the lower part of the light-transmitting substrate 11 is the inner side of the product, and the upper part is the outer side of the product. A light-blocking layer 12 is provided on part of the inner side of the light-transmitting substrate 11, and the part of the light-transmitting substrate 11 without the light-blocking layer 12 forms the light-transmitting part 13. The polarizing film 14 is attached to the outer side of the light-transmitting substrate 11 by its own adhesive layer 15 to block and filter the light.

[0045] In the actual product, after the polarizer 14 is attached to the outer surface of the light-transmitting substrate 11 via its self-adhesive backing layer 15, a distinct dividing edge is formed on the outer surface of the product due to the visual difference between the polarizer 14 and the light-transmitting substrate 11. The inner periphery of this dividing edge is the raised polarizer 14, while the outer periphery corresponds to the position on the light-transmitting substrate 11 that is the inner light-blocking layer 12. Since this part is directly exposed on the product, this assembly method gives the product a less concise and aesthetically pleasing visual effect, thus reducing the product's competitiveness. Moreover, because the polarizer 14 is exposed to the outside world, it is also prone to defects such as dirt, scratches, and damage due to environmental influences, which will affect the polarization effect after long-term use.

[0046] To address the aforementioned issues, the polarizer and light-blocking layer could be interchanged. Specifically, the polarizer could be placed on the inner side of the light-transmitting substrate, while the light-blocking layer could be placed on the outer side, thus improving the aesthetic appearance of the product's exterior. The specific assembly method is as follows: Figure 2 As shown in the cross-sectional structure, Figure 2 and Figure 1 The comparison shows that, compared to Figure 1 , Figure 2 In this case, the light-blocking layer 12 is placed on the outside of the light-transmitting substrate 11, and the polarizer 14 is placed on the inside of the light-transmitting substrate 11.

[0047] Practical testing has shown that this assembly method still has defects. The light-blocking layer 12 formed by screen printing in the actual product has a relatively rough surface compared to... Figure 1 The outer surface of the light-transmitting substrate 11 shown is not smooth and aesthetically pleasing, and the light-blocking layer 12 does not have the same structural strength as the light-transmitting substrate 11. After the light-blocking layer 12 is placed on the outer surface of the light-transmitting substrate 11, it is easily affected by environmental factors, resulting in dirt, scratches, etc., which further affects the product's aesthetics. Furthermore, compared to… Figure 1 In addition, the gloss of the product's appearance is significantly reduced.

[0048] After analyzing and summarizing the reasons for the defects of the above two methods, a new improved design was proposed. Please refer to [link / reference needed] for details. Figure 3As shown in the cross-sectional structure, the light-blocking layer 12 and the polarizer 14 are both disposed on the inner side of the light-transmitting substrate 11. In order to make the polarizer 14 completely cover the light-transmitting part 13, the area of ​​the polarizer 14 is designed to be larger than the area of ​​the inner side of the light-transmitting part 13. The polarizer 14 is attached to both the light-transmitting part 13 and the inner side of the light-blocking layer 12. Since the light-blocking layer 12 has a certain thickness, a step 16 will be formed at the position where the light-blocking layer 12 is adjacent to the light-transmitting part 13. Since the polarizer 14 cannot be deformed completely perpendicularly, at the step 16, the polarizer 14 cannot be broken into a right angle and completely attached. Instead, it needs to be inclined to transition. This results in a small gap 17 being formed between the adhesive layer 15 and the inner side of the light-transmitting part 13 at the step 16.

[0049] Figure 3 In the corresponding physical product, the polarizer 14 is generally dark gray. Therefore, the portion of the polarizer 14 directly attached to the light-transmitting substrate 11 via the adhesive layer 15 will appear dark gray in a large area in the center of the light-transmitting portion 13 when viewed from the outside of the product. Figure 3 The gap 17 formed at the step 16 will appear as a light gray color, similar to bubbles in a thin film, when viewed from the outside of the product. This will also affect the cleanliness and aesthetics of the product.

[0050] To eliminate the light gray area caused by internal gaps in the above solution, a further consideration is to attach the polarizer only to the inner surface of the light-transmitting part, specifically as follows: Figure 4 As shown in the cross-sectional structure, the polarizer 14 is only attached to the inner side of the light-transmitting part 13 and not to the light-blocking layer 12. As a result, due to the tolerances in the manufacturing process of the light-blocking layer 12 and the polarizer 14, it is difficult to make the outer edge of the polarizer 14 fit perfectly with the inner edge of the light-blocking layer 12. Therefore, a gap 18 will be generated between the outer edge of the polarizer 14 and the inner edge of the light-blocking layer 12. Furthermore, it has been found in practice that the outer edge of the polarizer 14 is also prone to curling.

[0051] Figure 4 From an external perspective, the corresponding physical product shows that there is a gap between the outer edge of the polarizer 14 and the inner edge of the light-blocking layer 12. Figure 4 The gap 18 shown not only fails to eliminate the light gray area at the edge of the light-transmitting part 13, but also causes a larger area of ​​light gray area to appear on the outer edge of the light-transmitting part 13 due to the warping of the polarizer 14, resulting in a further decrease in aesthetics.

[0052] For the reasons mentioned above, in order to ensure that the color of the light-transmitting part remains consistent from the appearance, this application, based on the light-blocking layer being set on the inner side of the light-transmitting substrate, places a polarizing sheet in a straight position on the light-blocking layer, while the polarizing sheet covers the light-transmitting part, so that the polarizing sheet as a whole is spaced apart from the inner side of the light-transmitting part. From the appearance, the entire surface of the light-transmitting part is light gray, thereby eliminating the color difference between dark gray and light gray that exists in other methods mentioned above, making the overall color of the light-transmitting part consistent and aesthetically pleasing.

[0053] Based on this, according to one aspect of the embodiments of this application, an optical polarization component is provided, which includes, but is not limited to, applications in barcode readers, visual inspection devices, stereo imaging devices, etc.

[0054] Please see Figure 5 The figure shows a cross-sectional structure of the optical polarization component provided in an embodiment of this application. As shown in the figure, the optical polarization component 100 includes a light-transmitting substrate 110 and a polarizer 120. A light-blocking layer 111 is provided on a portion of the inner surface of the light-transmitting substrate 110, and a portion of the light-transmitting substrate 110 without the light-blocking layer 111 forms a light-transmitting portion 112. The polarizer 120 is disposed in a straight line on the inner surface of the light-blocking layer 111 away from the inner surface of the light-transmitting substrate 110, and the polarizer 120 covers the light-transmitting portion 112.

[0055] Specifically, the light-transmitting substrate 110 can be protective glass or a transparent plastic part, etc. The light-blocking layer 111 can be a screen-printed layer. For example, after screen printing ink on the inner side of the light-transmitting substrate 110, the ink, after drying, is fixed on the surface of the light-transmitting substrate 110 to form a screen-printed layer that can block light. This manufacturing process is simple and low-cost. In addition, the light-blocking layer 111 can also be an existing light-blocking film, light-blocking sheet, or a light-shielding layer formed by spraying, etc.

[0056] like Figure 5 As shown, the polarizer 120 and the light-blocking layer 111 can be bonded together via an adhesive backing layer 130. The adhesive backing layer 130 can be an adhesive layer already present on the polarizer 120, or a polarizer 120 without an adhesive layer can be used. The polarizer 120 is then attached to the light-blocking layer 111 and fixed by applying adhesive to it. This method of bonding the polarizer 120 with the adhesive backing layer 130 is simple, low-cost, and beneficial for mass production. In other embodiments, the polarizer 120 and the light-blocking layer 111 can also be connected and fixed using methods such as heat pressing.

[0057] Regarding the appearance of the light polarization component 100 provided in this application embodiment at the light-transmitting part 112, the light polarization component 100 provided in this application embodiment presents a uniform light gray color at the light-transmitting part 112, with no color difference between the middle and the edge of the light-transmitting part 112, and a neat and beautiful appearance.

[0058] Meanwhile, in the optical polarization component 100 provided in this application embodiment, both the light-blocking layer 111 and the polarizer 120 are disposed on the inner side of the light-transmitting substrate 110. Both can be better protected by the light-transmitting substrate 110, avoiding defects such as dirt and scratches, and ensuring the polarization effect. Furthermore, since the polarizer 120 covers the light-transmitting part 112 and is disposed on the inner side of the light-blocking layer 111, when viewed from the outside of the light-transmitting substrate 110, the edge where the polarizer 120 connects to the light-blocking layer 111 is blocked by the light-blocking layer 111 and cannot be seen, thereby further ensuring the overall aesthetics of the product.

[0059] According to another aspect of the embodiments of this application, an image acquisition device is also provided. The image acquisition device 500 can specifically be a barcode reader, a stereoscopic imaging device, etc. The following description and the accompanying drawings use a barcode reader as an example for illustration and explanation.

[0060] Please refer to details. Figure 6 The figure shows the front structure of the image acquisition device, with dashed lines indicating components within the light-transmitting portion. As shown, the image acquisition device 500 includes a housing 200, a supplementary light source 300, a lens assembly 400, and the light polarization component 100 provided in the above embodiment. The light polarization component 100 is embedded in the housing 200, and both the supplementary light source 300 and the lens assembly 400 are disposed within the housing 200 and face the light-transmitting portion 112 of the light-transmitting substrate 110.

[0061] The physical product of the image acquisition device 500 provided in this application embodiment, after adopting the optical polarization component 100 provided in the above embodiment, has a uniform color at the light-transmitting part 112, and the overall appearance of the image acquisition device 500 is neat and beautiful.

[0062] Please continue reading. Figure 6 The light-transmitting portion 112 may include a first light-transmitting portion 1121 and a second light-transmitting portion 1122. Please further combine... Figure 7 , Figure 7 The diagram illustrates the structure inside the optical polarization component 100 of the image acquisition device 500 provided in this embodiment. The dashed lines in the diagram represent the light-transmitting portion seen through the polarizer. As shown, the polarizer 120 may include a first polarizer 121 and a second polarizer 122. The first polarizer 121 covers the first light-transmitting portion 1121, and the second polarizer 122 covers the second light-transmitting portion 1122.

[0063] The supplementary light source 300 is positioned towards the first light-transmitting portion 1121, and the lens assembly 400 is positioned towards the second light-transmitting portion 1122. The polarization direction of the first polarizer 121 is at a 90-degree angle to the polarization direction of the second polarizer 122. The light emitted from the supplementary light source 300 is filtered by the first polarizer 121 into linearly polarized light with the same polarization direction. This light then passes through the first light-transmitting portion 1121 and illuminates the shooting area. When the smooth surface in the shooting area reflects this linearly polarized light to the second light-transmitting portion 1122, since the polarization direction of this linearly polarized light is perpendicular to the polarization direction of the second polarizer 122, it is blocked by the second polarizer 122 and does not enter the lens assembly 400, thus preventing overexposure of the captured image. The light diffusely reflected to the second light-transmitting portion 1122 in the shooting area is non-linearly polarized light. Light rays with the same polarization direction as the second polarizer 122 enter the lens assembly 400 to achieve normal imaging.

[0064] Considering that the first polarizer 121 and the second polarizer 122 reduce light intensity, the acquired image may be insufficiently bright in dark environments. Therefore, this application further proposes an implementation method, please refer to the following: Figures 6 to 7 As shown in the figure, the supplementary lighting source 300 includes a first light source 310 and a second light source 320, with the first light source 310 positioned towards the first light-transmitting portion 1121. The light-transmitting portion 112 also includes a third light-transmitting portion 1123, such as... Figure 7 As shown, the third light-transmitting part 1123 is not covered by the polarizer 120, and the second light source 320 is positioned toward the third light-transmitting part 1123.

[0065] In this embodiment, when in a relatively dark environment, and the image captured by using only the first light source 310 for supplementary lighting cannot meet the brightness requirements, the second light source 320 can be used for supplementary lighting, or the first light source 310 and the second light source 320 can be used simultaneously for supplementary lighting. The specific choice can be made according to the imaging situation. Since the third light-transmitting part 1123 is not covered by the polarizer 120, the intensity of the light emitted by the second light source 320 will not be reduced, thus providing a better supplementary lighting effect.

[0066] When using the second light source 320 for supplemental lighting, there is a problem of overexposure, while using the first light source 310 for supplemental lighting results in insufficient brightness. In such cases, the second light source 320 can be selected for supplemental lighting, and the relative distance and angle between the image acquisition device 500 and the shooting area can be adjusted appropriately to meet the imaging brightness requirements while avoiding overexposure as much as possible.

[0067] like Figure 6As shown, the first light-transmitting portion 1121 and the second light-transmitting portion 1123 can be respectively disposed on opposite sides of the second light-transmitting portion 1122. Of course, in other embodiments, the first light-transmitting portion 1121 and the second light-transmitting portion 1123 can also be disposed on the same side of the second light-transmitting portion 1122.

[0068] The supplementary light source 300 may include multiple light-emitting units arranged in an array, specifically, as shown in... Figure 6 The array shown can be set up with multiple rows and columns, or you can set up only one row or one column.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. An optical polarization component, characterized in that, include: A light-transmitting substrate, wherein a light-blocking layer is provided on a portion of the inner surface of the light-transmitting substrate, and a portion of the light-transmitting substrate without the light-blocking layer forms a light-transmitting portion; A polarizer is disposed in a straight line on the inner side of the light-blocking layer away from the light-transmitting substrate and covers the light-transmitting part.

2. The optical polarization component according to claim 1, characterized in that, The light-blocking layer is a screen-printed layer.

3. The optical polarization component according to claim 1, characterized in that, The polarizer and the light-blocking layer are bonded together by an adhesive backing layer.

4. The optical polarization component according to claim 1, characterized in that, The light-transmitting substrate is protective glass.

5. An image acquisition device, characterized in that, The device includes a housing, a supplementary light source, a lens assembly, and a light polarization component as described in any one of claims 1-4. The light polarization component is embedded in the housing, and the supplementary light source and the lens assembly are both disposed inside the housing and face the light-transmitting portion on the light-transmitting substrate.

6. The image acquisition device according to claim 5, characterized in that, The light-transmitting part includes a first light-transmitting part and a second light-transmitting part, and the polarizer includes a first polarizer and a second polarizer. The first polarizer covers the first light-transmitting part, and the second polarizer covers the second light-transmitting part. The polarization direction of the first polarizer is at 90 degrees to the polarization direction of the second polarizer. The supplementary light source is positioned toward the first light-transmitting part, and the lens assembly is positioned toward the second light-transmitting part.

7. The image acquisition device according to claim 6, characterized in that, The supplementary light source includes a first light source and a second light source, with the first light source positioned toward the first light-transmitting portion; The light-transmitting part further includes a third light-transmitting part, which is not covered by the polarizer, and the second light source is disposed toward the third light-transmitting part.

8. The image acquisition device according to claim 7, characterized in that, The first light-transmitting portion and the third light-transmitting portion are located on opposite sides of the second light-transmitting portion.

9. The image acquisition device according to claim 5, characterized in that, The supplementary light source includes multiple light-emitting units arranged in an array.

10. The image acquisition device according to any one of claims 5-9, characterized in that, The image acquisition device is a barcode reader.

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