A stray light prevention structure and imaging device

Abstract

This utility model relates to an anti-stray light structure and imaging device, including a mirror base and a light-transmitting plate. The top of the mirror base is provided with a first connecting surface, and the lower surface of the light-transmitting plate is disposed on the first connecting surface. At least a portion of the edge of the lower surface of the light-transmitting plate is located outside the first connecting surface.

Description

Technical Field

[0001] This utility model relates to the field of imaging lenses, and in particular to an anti-stray light structure and imaging device. Background Technology

[0002] With the continuous iteration and upgrading of intelligent driving technology, the in-vehicle imaging system, as an important part of intelligent driving technology, needs to continuously improve its imaging quality in order to meet the ever-increasing demands of intelligent driving.

[0003] Existing vehicle imaging systems mainly consist of three parts: a lens, a light-transmitting film, and a photosensitive chip. The light collected by the lens needs to be transmitted to the photosensitive chip through the light-transmitting film, and then the photosensitive chip forms an image. However, in actual imaging processes, it has been found that the light received by the photosensitive chip, in addition to that from the lens, often includes a large amount of stray light, which makes it difficult to further improve the image quality of the vehicle imaging system. Utility Model Content

[0004] Therefore, it is necessary to provide an anti-stray light structure and imaging device to address the problem of poor imaging quality in vehicle-mounted imaging systems.

[0005] An anti-stray light structure includes a mirror base and a light-transmitting plate. The top of the mirror base is provided with a first connecting surface, and the lower surface of the light-transmitting plate is disposed on the first connecting surface. At least a portion of the edge of the lower surface of the light-transmitting plate is located outside the first connecting surface.

[0006] In one embodiment, the normal of the light-transmitting plate is a first direction, and the projection of the first connecting surface in the first direction is completely located within the lower surface of the light-transmitting plate.

[0007] In one embodiment, the anti-stray light structure further includes a first adhesive layer disposed between the lower surface of the light-transmitting plate and the first connecting surface, wherein the light-transmitting plate is bonded to the first connecting surface through the first adhesive layer.

[0008] In one embodiment, an overflow groove is provided on the first connecting surface, and a portion of the first adhesive layer is located within the overflow groove.

[0009] In one embodiment, the first adhesive layer is made of CG adhesive.

[0010] An imaging device includes a photosensitive chip, a substrate, and a stray light protection structure. A lens mount is mounted on the substrate, and the substrate, the lens mount, and the light-transmitting plate surround an imaging chamber, in which the photosensitive chip is mounted.

[0011] In one embodiment, the imaging device includes a second adhesive layer, a second connecting surface is provided at the bottom of the lens mount, the second adhesive layer is disposed between the lens mount and the substrate, and the lens mount is bonded to the substrate through the second adhesive layer.

[0012] In one embodiment, the lens mount is provided with an exhaust hole located between the first connecting surface and the second connecting surface. One end of the exhaust hole extends through the imaging chamber, and the other end extends through the outer wall of the lens mount.

[0013] In one embodiment, the vent is located at the second connecting surface.

[0014] In one embodiment, the material of the second adhesive layer is HA adhesive.

[0015] The beneficial effects of this utility model are as follows:

[0016] Compared with the prior art, the present invention firstly eliminates the edging set at the outer edge of the first connecting surface. Without the edging limiting condition, the size of the light-transmitting plate can be appropriately increased. Both the inner and outer edges of the first connecting surface can be used to connect the light-transmitting plate. Thus, at least part of the edge of the lower surface of the light-transmitting plate can be located outside the first connecting surface, thereby ensuring the connection area and connection stability between the light-transmitting plate and the mirror base.

[0017] One major source of stray light is reflection at the outer edge of the first connecting surface. In other words, in the prior art, the reflection of light by the perimeter at the outer edge of the first connecting surface is one of the main sources of stray light. In this invention, the edge of the light-transmitting plate replaces the perimeter in reflecting light at the outer edge of the first connecting surface. Since light is not only reflected but also refracted at the edge of the light-transmitting plate, the reflected light (stray light) energy at the edge of the light-transmitting plate is relatively low, thus improving the imaging quality in the subsequent imaging device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the imaging device in the embodiment of this utility model. Figure 1 ;

[0019] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0020] Figure 3 This is a three-dimensional structural diagram of the imaging device in the embodiment of this utility model. Figure 2 ;

[0021] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0022] Figure 5 This is a three-dimensional structural diagram of the mirror base in an embodiment of the present utility model;

[0023] Figure 6 for Figure 5 Enlarged structural diagram at point C;

[0024] Figure 7 This is a cross-sectional structural diagram of the imaging device in an embodiment of the present invention;

[0025] Figure 8 for Figure 7 Enlarged structural diagram at point D.

[0026] Figure label:

[0027] 1. Lens mount; 11. First connecting surface; 111. Glue overflow groove; 12. Second connecting surface; 13. Vent hole; 2. Light-transmitting plate; 3. First adhesive layer; 4. Second adhesive layer; 100. Imaging chamber. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] Example:

[0035] This embodiment provides an imaging device, including a photosensitive chip (not shown in the figure), a substrate (not shown in the figure), and an anti-stray light structure.

[0036] like Figure 1 , Figure 3 and Figure 7 As shown, the anti-stray light structure in this embodiment includes a mirror base 1 and a light-transmitting plate 2.

[0037] See further Figure 5 and Figure 6 In this embodiment, the mirror base 1 is generally rectangular, with a first connecting surface 11 at the top and a second connecting surface 12 at the bottom. Specifically, as follows... Figure 8As shown, the lower surface of the light-transmitting plate 2 is disposed on the first connecting surface 11, and the second connecting surface 12 can be disposed on the substrate, thereby forming an imaging chamber 100 by the substrate, the mirror mount 1, and the light-transmitting plate 2. The photosensitive chip is mounted in the imaging chamber 100, for example, it can be mounted on the substrate. The first connecting surface 11 can avoid the middle portion of the light-transmitting plate 2 to allow light from outside the imaging chamber 100 to enter the imaging chamber 100 through the middle portion of the light-transmitting plate 2, and then be detected by the photosensitive chip and imaged.

[0038] by Figure 5 and Figure 6 For reference, in the prior art, the portion of the first connecting surface 11 near its inner edge is used to support and connect (generally by bonding) the light-transmitting plate 2, while the portion of the first connecting surface 11 near its outer edge is provided with a surrounding edge, which surrounds the periphery of the light-transmitting plate 2 to limit its position. In the prior art, the stability of the light-transmitting plate 2 on the first connecting surface 11 needs to be ensured through the cooperation of the first connecting surface 11 and the surrounding edge. The inventors have discovered that in the prior art, the light entering the imaging chamber 100 contains a large amount of stray light, and a considerable portion of this stray light is generated by light reflected from the surrounding edge.

[0039] Based on the above research results, in this embodiment, the surrounding edge is removed from the first connecting surface 11, and the size of the light-transmitting plate 2 is further increased, ultimately as follows: Figure 2 and Figure 4 As shown, at least a portion of the edge of the lower surface of the light-transmitting plate 2 is located outside the first connecting surface 11. In other words, the portion of the first connecting surface 11 originally used to set the edging is used in this embodiment to directly support and connect the light-transmitting plate 2.

[0040] This configuration ensures that the connection area between the light-transmitting plate 2 and the lens mount 1 is not significantly reduced compared to existing technologies, thus guaranteeing the connection stability of the light-transmitting plate 2 on the lens mount 1. On the other hand, it improves the imaging quality of the photosensitive chip.

[0041] The specific principle behind this embodiment for improving the imaging quality of the photosensitive chip is as follows: In the prior art, the reflection of light at the edge position forms stray light; however, in this embodiment, the light that was originally reflected at the edge position is reflected at the edge of the light-transmitting plate 2. Since the light is refracted in addition to being reflected at the edge of the light-transmitting plate 2, the reflected light energy is relatively low. In other words, the stray light energy in this embodiment is reduced compared to the prior art, thereby improving the imaging quality of the photosensitive chip.

[0042] Understandably, to maximize the aforementioned effects, it is preferable that the entire first connecting surface 11 is used to support and connect the light-transmitting plate 2. Specifically, as follows... Figure 7As shown, the normal of the light-transmitting plate 2 is the first direction, and the projection of the first connecting surface 11 in the first direction is completely located within the lower surface of the light-transmitting plate 2.

[0043] Commonly, the light-transmitting plate 2 and the first connecting surface 11 are connected by adhesive bonding, and the second connecting surface 12 and the substrate are also connected by adhesive bonding. Correspondingly, as... Figure 2 and Figure 8 As shown, the anti-stray light structure also includes a first adhesive layer 3, which is disposed between the lower surface of the light-transmitting plate 2 and the first connecting surface 11. The light-transmitting plate 2 is bonded to the first connecting surface 11 through the first adhesive layer 3. The imaging device includes a second adhesive layer 4, which is disposed between the second connecting surface 12 and the substrate. The lens mount 1 is bonded to the substrate through the second adhesive layer 4.

[0044] Understandably, in order to enhance the connection strength between the light-transmitting panel 2 and the first connecting surface 11 without removing the surrounding edge, it is necessary to appropriately increase the amount of adhesive used between the light-transmitting panel 2 and the first connecting surface 11. Therefore, as follows... Figure 6 and Figure 8 As shown, the first connecting surface 11 can be recessed to form an overflow groove 111, which can hold more glue. Correspondingly, a portion of the first adhesive layer 3 is located within the overflow groove 111. Furthermore, by allowing excess glue to enter the overflow groove 111, the bonding of the light-transmitting plate 2 on the first connecting surface 11 can be made smoother, thus improving the bonding quality of the light-transmitting plate 2 on the first connecting surface 11.

[0045] For example, the first adhesive layer 3 is made of CG adhesive, and the second adhesive layer 4 is made of HA adhesive.

[0046] CG adhesive and HA adhesive require a drying process to achieve a stable bonding effect, during which a certain amount of gas is generated. Since the first adhesive layer 3 is located between the first connecting surface 11 and the light-transmitting plate 2, and the second adhesive layer 4 is located between the second connecting surface 12 and the substrate, some of the gas generated during the drying process of the first adhesive layer 3 and the second adhesive layer 4 will enter the imaging chamber 100, causing an increase in the pressure inside the imaging chamber 100.

[0047] To solve this problem, a vent 13 is provided on the mirror mount 1. For example... Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, the vent 13 is located between the first connecting surface 11 and the second connecting surface 12. One end of the vent 13 extends into the imaging chamber 100, and the other end extends into the outer wall of the lens mount 1 to prevent the end of the vent 13 from being blocked by the light-transmitting plate 2 and the substrate. Gas inside the imaging chamber 100 can be discharged to the outside through the vent 13.

[0048] For example, the vent 13 is located at the second connecting surface 12.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A structure for preventing stray light, comprising a mirror base (1) and a light-transmitting plate (2), wherein the top of the mirror base (1) is provided with a first connecting surface (11), and the lower surface of the light-transmitting plate (2) is disposed on the first connecting surface (11), characterized in that, At least a portion of the edge of the lower surface of the light-transmitting plate (2) is located outside the first connecting surface (11).

2. The anti-stray light structure according to claim 1, characterized in that, The normal of the light-transmitting plate (2) is the first direction, and the projection of the first connecting surface (11) in the first direction is completely located within the lower surface of the light-transmitting plate (2).

3. The anti-glare structure according to claim 1, wherein, The anti-stray light structure also includes a first adhesive layer (3), which is disposed between the lower surface of the light-transmitting plate (2) and the first connecting surface (11). The light-transmitting plate (2) is bonded to the first connecting surface (11) by the first adhesive layer (3).

4. The anti-glare structure according to claim 3, characterized in that, An overflow groove (111) is provided on the first connecting surface (11), and a portion of the first adhesive layer (3) is located in the overflow groove (111).

5. The anti-glare structure according to claim 3, wherein The first adhesive layer (3) is made of CG glue.

6. An image forming apparatus characterized by comprising: The device includes a photosensitive chip, a substrate, and an anti-stray light structure as described in any one of claims 1-5. The lens mount (1) is mounted on the substrate, and the substrate, the lens mount (1), and the light-transmitting plate (2) surround to form an imaging chamber (100). The photosensitive chip is mounted in the imaging chamber (100).

7. The imaging apparatus according to claim 6, wherein The imaging device includes a second adhesive layer (4), and a second connecting surface (12) is provided at the bottom of the lens mount (1). The second adhesive layer (4) is disposed between the lens mount (1) and the substrate, and the lens mount (1) is bonded to the substrate through the second adhesive layer (4).

8. The imaging apparatus according to claim 7, characterized in that, The mirror base (1) is provided with an exhaust hole (13), which is located between the first connecting surface (11) and the second connecting surface (12). One end of the exhaust hole (13) extends through the imaging chamber (100), and the other end of the exhaust hole (13) extends through the outer wall of the mirror base (1).

9. The imaging apparatus according to claim 8, wherein The vent (13) is located at the second connecting surface (12).

10. The imaging apparatus according to claim 9, wherein The material of the second adhesive layer (4) is HA glue.

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