Optical device, camera module and electronic apparatus

Abstract

The present application belongs to the field of electronic apparatuses. Disclosed are an optical device, a camera module and an electronic apparatus. The optical device comprises a light-transmitting body and a light-shielding layer arranged on an optical surface of the light-transmitting body, the light-transmitting body being a light-transmitting structural component, the optical surface comprising a first area and a second area, and the second area being arranged in a surrounding mode outside the first area; in the circumferential direction of the first area, the light-shielding layer covers at least part of the second area; and, in the direction from the outer side of the first area towards the center of the first area, the light transmittance of the part of the second area covered by the light-shielding layer gradually increases from a first preset value to a second preset value.

Description

Optical devices, camera modules and electronic devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on January 15, 2024, with application number 202410060405.8 and invention name “Optical device, camera module and electronic device”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the technical field of electronic equipment, and specifically relates to an optical device, a camera module and an electronic device. Background Art

[0004] Current electronic devices, such as mobile phones, are often equipped with camera modules for capturing images. These modules use lenses to focus light and then use photosensitive devices to form images. To enhance night scene photography, for example, it's often necessary to increase the aperture of the camera module. In this case, to reduce the overall thickness of the module, some lenses are typically trimmed. Furthermore, the structure of camera modules is often relatively complex, potentially leading to other mechanisms blocking the light path. This can lead to or exacerbate diffraction stray light generated by the camera module, creating diffraction patterns such as starbursts, which can affect the camera module's imaging performance. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide an optical device, a camera module and an electronic device to solve the problem of diffraction stray light generated by the current camera module during the shooting process.

[0006] In a first aspect, embodiments of the present application provide an optical device comprising a light-transmitting body and a light-shielding layer disposed on an optical surface of the light-transmitting body, wherein the light-transmitting body is a light-transmitting structural member, and the optical surface comprises a first region and a second region, wherein the second region is disposed circumferentially outside the first region, and the light-shielding layer covers at least a portion of the second region in a circumferential direction of the first region;

[0007] In a direction from the outer side of the first area toward the center of the first area, the light transmittance of a portion of the second area covered by the light shielding layer gradually increases from a first preset value to a second preset value.

[0008] In a second aspect, an embodiment of the present application provides a camera module, which includes a lens mount and the above-mentioned optical device, wherein the optical device is fixed to the lens mount, and the axial direction of the optical device is parallel to the optical axis direction of the optical path of the camera module where it is located.

[0009] In a third aspect, an embodiment of the present application provides an electronic device comprising the above-mentioned camera module.

[0010] The embodiments of the present application disclose an optical device, which includes a light-transmitting body and a light-shielding layer disposed on an optical surface of the light-transmitting body. The light-transmitting body is a light-transmitting structural component, and the optical surface of the light-transmitting body includes a first region and a second region disposed around the first region. In the circumferential direction of the first region, the light-shielding layer covers at least a portion of the second region, thereby enabling a camera module to utilize the diffraction stray light phenomenon generated by the light-shielding layer in the optical device to be weakened. At the same time, in a direction from the outside of the first region to the center of the first region, by gradually increasing the light transmittance of the portion of the second region covered by the light-shielding layer from a first preset value to a second preset value, the light transmittance of the optical device can be prevented from undergoing a large degree of sudden change, thereby further improving the adverse effects of diffraction stray light on the imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a schematic structural diagram of an optical device disclosed in an embodiment of the present application;

[0012] FIG2 is a schematic diagram of the optical device disclosed in an embodiment of the present application in another direction;

[0013] 3 to 5 are several schematic diagrams of light transmittance at different positions on the optical device disclosed in the embodiments of the present application;

[0014] FIG6 is a photograph of the improvement effect of the optical device shown in FIG5 on diffraction stray light;

[0015] FIG7 is a cross-sectional view of the camera module disclosed in an embodiment of the present application.

[0016] The accompanying drawings are as follows: 100 - light-transmitting body, 110 - first area, 120 - second area, 200 - light-shielding layer, 310 - lens holder, 320 - prism, 330 - cover plate. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0018] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0019] As shown in Figure 1, an embodiment of the present application discloses an optical device comprising a light-transmitting body 100 and a light-shielding layer 200. The light-transmitting body 100 is a light-transmitting structural member, which can be formed from a relatively high-transmittance material such as glass or resin. The light-transmitting body 100 can typically be circular or rectangular in structure, and can be a flat lens or have corresponding refractive parameters, though this is not limited herein.

[0020] The light-shielding layer 200 has a certain light-shielding capability, thereby changing the overall light transmittance of the area it covers on the transparent body 100. Specifically, the light-shielding layer 200 may be formed of a light-shielding material such as black optical ink, thereby providing a light-shielding effect. Of course, the light-shielding layer 200 may also include other materials besides light-shielding materials.

[0021] In the optical device disclosed in the embodiments of the present application, a light-shielding layer 200 is disposed on the optical surface of the light-transmitting body 100. As shown in FIG2 , the optical surface of the light-transmitting body 100 includes a first region 110 and a second region 120, with the second region 120 disposed circumferentially outside the first region 110. As shown in FIG1 and FIG2 , the light-shielding layer 200 can cover at least a portion of the second region 120 circumferentially of the first region 110. In other words, the light-shielding layer 200 can have an open annular structure, or it can include multiple extended segments distributed along the circumference of the first region 110, with any two adjacent extended segments spaced apart from each other. Of course, the shading layer 200 can also cover the second area 120 as a whole. In this case, similar to the second area 120, as shown in Figure 1, the shading layer 200 is a closed ring structure. Correspondingly, similar to the second area 120, the shading layer 200 can also be arranged around the outside of the first area 110. In this case, the light incident on the optical device from any direction outside the first area 110 can basically be affected by the shading layer 200, so that the diffraction stray light generated by the light incident from any direction outside the first area 110 is relatively small, thereby improving the overall optical effect of the optical device.

[0022] It should be noted that during the molding process of the light-transmitting body 100, the optical surface comprising the second region 120 and the first region 110 can be formed simultaneously. There is no clear structural boundary between the two, and there can be no significant difference in other aspects such as material. In this application, in order to facilitate the description of the placement of the light-shielding layer 200, the light-entering surface or the light-emitting surface (both of which are optical surfaces) of the light-transmitting body 100 are artificially divided into different regions. Optical surfaces include the surfaces of an optical device where light enters and exits.

[0023] During the process of forming the light-shielding layer 200 in the second region 120 of the optical surface of the light-transmitting body 100, the light-shielding ability of locations on the light-shielding layer 200 at different distances from the center P of the first region can be changed by controlling parameters such as the thickness of the light-shielding layer 200 or the concentration of the light-shielding material in the light-shielding layer 200. Furthermore, the specific values ​​of the transmittance at different locations in the portion of the second region 120 where the light-shielding layer 200 is formed can be flexibly selected based on actual needs. Based on this, in the optical device disclosed in the embodiment of the present application, the transmittance of the portion of the second region 120 covered with the light-shielding layer 200 can be gradually increased from a first preset value to a second preset value in a direction from the outside of the first region 110 toward the center of the first region 110.

[0024] Among them, the first preset value and the second preset value can be flexibly selected according to actual conditions, and both can be selected between 0 and 100% (or 0 to 1). Optionally, the first preset value is greater than or equal to 0. In this case, the shading effect on the outside of the second area 120 is relatively good, thereby preventing stray light from entering from the outer edge of the shading layer 200. As for the second preset value, it can be made less than or equal to 100%. In this case, without considering that the transmittance of the light-transmitting body 100 is affected by parameters such as processing accuracy, it can be ensured that the transmittance of the inner part of the part covered with the light-transmitting layer in the second area 120 can be closer to the transmittance of the first area 110, thereby minimizing the jump in transmittance between the second area 120 and the first area 110, so that the shading layer 200 has a better effect in weakening diffraction stray light.

[0025] It should be noted that, when the transmittance is 0, the device can be considered to be completely opaque, and when the transmittance is 100% or 1, it can be considered that the device will basically not block or weaken the light. In addition, when the first area 110 is a circular structure and the second area 120 is an annular structure, the aforementioned direction from the outside of the first area 110 to the center of the first area 110 can specifically be the direction of any radius of the first area 110 pointing to the center of the circle. When the first area 110 is a rectangle or other shape, the aforementioned direction from the outside of the first area 110 to the center P of the first area 110 can specifically be the direction A in Figure 1. Figures 3 and 4 show the changes in the transmittance of the optical device in Figure 1 along direction A, and in the direction extending from the left side of the light-shielding layer to the right side of the light-shielding layer.

[0026] In layman's terms, in the embodiment of the present application, by providing the above-mentioned shading layer 200 in the second region 120, the transmittance of the outer edge of the second region 120 can be made relatively low, and the transmittance of the inner edge of the second region 120 can be made relatively high. At the same time, the transmittance of the second region 120 gradually increases along the direction from the aforementioned outer edge to the aforementioned inner edge, so that the transmittance of the portion of the optical device corresponding to the second region 120 tends to gradually change and increase from the edge to the center.

[0027] When the above technical solution is adopted, since there is no sudden change in the transmittance of the optical device with a relatively large difference in the direction from the edge to the center, the sharp filtering of the light can be weakened, the noise of the diffraction pattern and the oscillation of the edge can be reduced, the diffraction secondary energy of the light beam can be weakened, and the interference of the diffracted light on the imaging subject can be reduced, thereby achieving the purpose of improving the impact of diffraction stray light on imaging.

[0028] The present application discloses an optical device comprising a light-transmitting body 100 and a light-shielding layer 200 disposed on an optical surface of the light-transmitting body 100. The light-transmitting body 100 is a light-transmitting structural component, and the optical surface of the light-transmitting body 100 comprises a first region 110 and a second region 120 disposed around the first region 110. The light-shielding layer 200 covers at least a portion of the second region 120 in the circumferential direction of the first region 110, thereby enabling a camera module to utilize the light-shielding layer 200 in the optical device to weaken the diffraction stray light phenomenon. At the same time, in a direction from the outside of the first region 110 toward the center of the first region 110, by gradually increasing the light transmittance of the portion of the second region 120 covered by the light-shielding layer 200 from a first preset value to a second preset value, the light transmittance of the optical device can be prevented from undergoing a large degree of sudden change, thereby further improving the adverse effects of diffraction stray light on the imaging effect.

[0029] As described above, the present application can improve the diffraction stray light generated during the operation of the camera module using the optical device by setting a shading layer 200 in the second area 120 of the transparent body 100, wherein the size relationship between the second area 120 and the first area 110 can be determined according to actual conditions.

[0030] In a specific embodiment of the present application, the following restrictions can be imposed on the dimensional relationship between the second area 120 and the first area 110 in the direction from the outside of the first area 110 to the center of the first area 110. For the sake of convenience of description, the area in the optical device where the transmittance is less than the third preset value can be defined as the third area, and the area in the optical device where the transmittance is greater than the fourth preset value can be defined as the fourth area. Moreover, during the production process of the optical device, affected by parameters such as processing accuracy, even if the light-shielding layer 200 is not provided on the light-transmitting body 100, the transmittance of the light-transmitting body 100 may not be able to achieve the ability to transmit complete light. In other words, there may be certain areas or positions in the light-transmitting body 100 formed based on the current process where the transmittance is less than 100% (or less than 1). Limited by the current process accuracy and other conditions, in this application, the light-transmitting body 100 with the aforementioned conditions can also be considered to belong to the light-transmitting structural member mentioned in this application. Of course, during the processing of the transparent body 100, it is necessary to make the transmittance of the transparent body 100 as high as possible, make the fluctuation of the transmittance of the transparent body 100 relatively smaller, and make the transmittance of any position on the transparent body 100 as close to 100% as possible.

[0031] Based on the above situation, in the embodiment of the present application, the third preset value can be greater than the first preset value and less than the fourth preset value, and the fourth preset value can be less than the second preset value. The third and fourth preset values ​​can be flexibly selected based on actual conditions. In a specific embodiment of the present application, the third preset value can be greater than or equal to 10%, and / or the fourth preset value can be less than or equal to 90%. In this case, the light shielding layer 200 can improve the effect of reducing diffraction stray light, while minimizing the effect of the light shielding layer 200 on reducing the amount of incident light.

[0032] Furthermore, in the embodiment of the present application, the third area of ​​the optical device with a transmittance less than the third preset value can be identified as a substantially opaque area, while the fourth area of ​​the optical device with a transmittance greater than the fourth preset value can be identified as a substantially completely opaque area. The portion sandwiched between the third and fourth areas can be identified as a semi-transparent area. Of course, the "semi" in the aforementioned semi-transparent area does not necessarily mean that the transmittance is 50%, but is used to indicate that the light transmittance of the area is between opaque and completely opaque. At the same time, in the direction from the outside of the first area 110 to the center of the first area 110, the light transmittance of the aforementioned semi-transparent area tends to gradually increase.

[0033] Based on the above content, in the embodiment of the present application, in the direction from the outside of the first area 110 to the center of the first area 110, that is, in the direction A, the distance between the inner edge of the third area and the center of the first area 110 is a first distance H2, the distance between the outer edge of the fourth area and the center of the first area 110 is a second distance H1, and the ratio of the difference between the first distance and the second distance to the first distance is X. In the embodiment of the present application, 0<X≤0.5.

[0034] In layman's terms, in the embodiments of the present application, the first spacing represents the size of the optical device's light-transmitting area (including fully light-transmitting and semi-light-transmitting areas), the second spacing represents the size of the optical device's fully light-transmitting area, and the difference between the two represents the size of the semi-light-transmitting area. Based on this, X represents the ratio of the sizes of the semi-light-transmitting area to the fully light-transmitting area in the optical device.

[0035] That is to say, in the embodiment of the present application, in the direction from the outside of the first area 110 to the center of the first area 110, the size of the semi-transparent area is less than or equal to half the size of the fully transparent area. When adopting this technical solution, the gradual change in the light transmittance of the semi-transparent area can basically meet the needs of improving diffraction stray light, and basically will not have a significant adverse effect on the amount of light entering the camera module using this optical device. More specifically, the above-mentioned X can be made ≥ 10%. In this case, the gradual change in the light transmittance of the semi-transparent area can be further slowed down, thereby further reducing the adverse effects of diffraction stray light on the imaging effect.

[0036] Accordingly, when the value of X changes, the size of the light-shielding layer also varies. Accordingly, when the first and second preset values ​​of the light-shielding layer are the same (e.g., the first preset value is 0 and the second preset value is 100%), the light transmittance of the optical device varies in a direction from the outside of the first region 110 toward the center of the first region 110. As shown in FIG5 , for Examples 1, 2, and 3, the light transmittance at different locations on the optical device in a direction extending from the left side to the right side of the light-shielding layer and passing through the center P of the first region, when X is 50%, 30%, and 10%, respectively. FIG6 shows the improvement in diffraction stray light achieved by Examples 1, 2, and 3, respectively, as shown in FIG5 , when applied to a camera module. In more detail, compared with the technical solutions with the same shading ability at any position in the shading layer, the technical solutions respectively requested for protection in Examples 1, 2 and 3 have correspondingly reduced noise and edge oscillations in the diffraction pattern during imaging, and the diffraction order energy of the light beam is weakened, thereby reducing the interference of the diffracted light on the imaging.

[0037] As described above, during the design process of the transparent body 100, the light transmittance at any position or region on the transparent body 100 can be made 100%. However, due to limitations such as the processing precision of current processes, it may not be possible to guarantee that the light transmittance at any position on the actually processed transparent body 100 is 100%. In this case, in order to improve the overall light transmission effect of the transparent body 100 and reduce the difficulty of processing the light shielding layer 200, the light transmittance of the transparent body 100 can be uniformly varied. In other words, during the processing of the transparent body 100, the parameters of the materials used to form the transparent body 100 can be controlled to ensure that the light transmittance at any position on the transparent body 100 is substantially the same. Of course, due to the fact that the thickness at different positions on the transparent body 100 may be inconsistent, the transmittance at different positions in the transparent body 100 may still not be completely equal. To this end, the fluctuation range of the transmittance at different positions on the transparent body 100 can be maintained within a preset value. The aforementioned preset value can be specifically 10%. Furthermore, the fluctuation range of the transmittance at different positions on the transparent body 100 can be made within 5%. In this case, it can also be considered that the transmittance of the transparent body 100 is set to be uniform.

[0038] Based on the above-described light-transmitting body 100, during the process of forming the light-shielding layer 200 on the second region 120 of the optical surface of the light-transmitting body 100, the transmittance at positions in the light-shielding layer 200 that are equidistant from the center of the first region 110 can be made equal, and the transmittance of the light-shielding layer 200 can be made to gradually increase in a direction from the outside of the first region 110 toward the center of the first region 110. To this end, during the process of forming the above-described light-shielding layer 200, the transmittance at different positions in the light-shielding layer 200 can be varied accordingly by varying the thickness of the light-shielding layer 200 or the concentration of the light-shielding material in the light-shielding layer 200.

[0039] Specifically, the thickness of the light-shielding layer 200 can be gradually reduced in a direction from the outside of the first region 110 toward the center of the first region 110, while maintaining a consistent concentration of the light-shielding material at different locations in the light-shielding layer 200. In another embodiment of the present application, the concentration of the light-shielding material in the light-shielding layer 200 can be gradually reduced in a direction from the outside of the first region 110 toward the first region 110, while maintaining a consistent thickness at different locations in the light-shielding layer 200. Of course, both the change in the thickness of the light-shielding layer 200 and the change in the concentration of the light-shielding material in the light-shielding layer 200 can be linear or nonlinear, and this is not limited herein.

[0040] Based on the optical device disclosed in any of the above embodiments, the embodiment of the present application also discloses a camera module, as shown in Figure 7, which includes a lens holder 310 and any of the above optical devices. Among them, the lens holder 310 can be specifically formed of a hard material such as metal or plastic, which is used as the external structure of the camera module and provides installation and protection for other structures in the camera module such as optical devices. The optical device can be fixedly mounted on the lens holder 310 by bonding or snapping. Of course, the specific installation position of the optical device can be flexibly selected according to actual conditions. However, for the orientation of the optical device, in the camera module disclosed in the embodiment of the present application, it is necessary to make the axial direction of the optical device parallel to the optical axis direction of the optical path of the camera module where the optical device is located in the lens holder 310. For example, when the optical device is arranged at the light entrance of the lens holder 310, the axial direction of the optical device is parallel to the axial direction of the light entrance; when the optical device is arranged at the light exit of the lens holder 310, the axial direction of the optical device is parallel to the axial direction of the light exit, wherein the axial direction of the aforementioned light entrance may be parallel to the axial direction of the aforementioned light exit; in other embodiments of the present application, the axial direction of the aforementioned light entrance may also be perpendicular to the axial direction of the aforementioned light exit, which is not limited in this document.

[0041] As described above, the light-transmitting body 100 in the optical device is a light-transmitting structural member. In the camera module disclosed in the embodiment of the present application, the light-transmitting body 100 of the optical device is an optical lens, which is a device in the camera module for providing optical effects. In this case, the light-shielding layer 200 can be directly arranged on the light-entry surface and / or light-exiting surface of the optical lens, thereby eliminating the need to add other devices to the camera module. Specifically, the optical lens can include a convex lens and a concave lens. In other embodiments of the present application, the camera module can be a periscope camera module. Based on this, the optical lens can also include a prism 320. The prism 320 can change the propagation direction of the light path within the camera module, thereby enabling the camera module to have a larger focal length while having a relatively small size in its own thickness direction, thereby expanding the scope of application of the camera module and improving the imaging effect of the camera module. Accordingly, when the optical lens is a prism 320, the light-shielding layer 200 can also be arranged on the light-entry surface and / or light-exiting surface of the prism 320.

[0042] In other embodiments of the present application, the light-transmitting body 100 of the optical device can also be a flat mirror, that is, the light-transmitting body 100 does not have the ability to provide optical effects on light. In this case, the optical device can be prepared in advance, and it is convenient for the optical device to be applied to the camera module that has been mass-produced. Of course, in the case where the flat mirror is not an original device in the camera module, the optical device can be installed at a certain gap position in the light path in the camera module by bonding or other methods, thereby reducing the diffraction stray light generated during the operation of the camera module. In another embodiment of the present application, the aforementioned flat mirror can specifically be a cover plate 330 of the camera module. The cover plate 330 can generally be formed of materials such as resin or glass, and the cover plate 330 is fixedly arranged at the light entrance hole of the lens mount 310, and the cover plate 330 is sealed with the light entrance hole, so that the cover plate 330 can prevent external impurities such as water vapor or dust from entering the camera module, thereby improving the reliability and service life of the camera module. Correspondingly, the light shielding layer 200 may also be disposed on the light incident surface and / or the light emitting surface of the cover plate 330 .

[0043] Of course, in the camera module disclosed in the embodiment of the present application, only one optical device may be provided, and the above-mentioned light-shielding layer may be formed on one optical surface of the optical device, so that the camera module has a relatively good imaging effect while the overall cost of the camera module is relatively low. In the camera modules disclosed in other embodiments of the present application, the above-mentioned light-shielding layer may be formed on both the light-entry surface and the light-exit surface of the optical device; or, the camera module may be provided with multiple optical devices, and the above-mentioned light-shielding layer may be formed on at least one optical surface of each optical device, so as to further enhance the light-shielding layer's improvement effect on diffraction stray light.

[0044] Based on any of the above-mentioned camera modules, an embodiment of the present application also discloses an electronic device, which includes any of the above-mentioned camera modules. Of course, the electronic device may also include other components such as a housing, a battery, and a display screen. Considering the simplicity of the text, it will not be introduced in detail here.

[0045] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An optical device includes a light-transmitting body and a light-shielding layer disposed on an optical surface of the light-transmitting body. The light-transmitting body is a light-transmitting structural member. The optical surface includes a first region and a second region. The second region is disposed around the first region. In the circumferential direction of the first region, the light-shielding layer covers at least a part of the second region. In a direction from the outside of the first region towards the center of the first region, the light transmittance of the part of the second region covered with the light-shielding layer gradually increases from a first preset value to a second preset value.

2. The optical device according to claim 1, wherein, In the optical device, a region with a light transmittance less than a third preset value is a third region, and a region with a light transmittance greater than a fourth preset value is a fourth region. Wherein, the third preset value is greater than the first preset value and less than the fourth preset value, and the fourth preset value is less than the second preset value. In a direction from the outside of the first region towards the center of the first region, the distance between the inner edge of the third region and the center of the first region is a first distance, and the distance between the outer edge of the fourth region and the center of the first region is a second distance. The ratio of the difference between the first distance and the second distance to the first distance is X, and 0 < X ≤ 0.

5.

3. The optical device according to claim 2, wherein, The first preset value is greater than or equal to 0, and the second preset value is less than or equal to 100%. And / or the third preset value is greater than or equal to 10%, and / or the fourth preset value is less than or equal to 90%.

4. The optical device according to claim 1, wherein, The light-shielding layer is a closed annular structure and is disposed around the first region.

5. The optical device according to claim 1, wherein, The light transmittance of the light-transmitting body is uniformly changed. The light-shielding layer includes a light-shielding material, and the light-shielding material includes optical ink.

6. The optical device according to claim 5, wherein, In a direction from the outside of the first region towards the center of the first region, the thickness of the light-shielding layer gradually decreases, and the concentration of the optical ink in the light-shielding layer is uniform. Or, in a direction from the outside of the first region towards the center of the first region, the concentration of the optical ink in the light-shielding layer gradually decreases, and the thickness of the light-shielding layer is uniform.

7. An imaging module includes a lens holder and the optical device according to any one of claims 1-6. The optical device is fixed to the lens holder, and the axis of the optical device is parallel to the optical axis direction of the optical path of the imaging module.

8. The imaging module according to claim 7, wherein, The light-transmitting body is an optical lens.

9. The imaging module according to claim 7, wherein, The light-transmitting body is a plano lens.

10. An electronic device includes the imaging module according to any one of claims 7-9.

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