JP2021196486A - Optical device, adjustment method, and washer - Google Patents

Abstract

To provide an optical device that has high reliability, an adjustment method for the optical device, and a washer that is used in the optical device.SOLUTION: An optical device comprises: a substrate 32 that has a hole 32H; a washer 50 that has a first surface 51, a second surface 52, and a hole 50H penetrating the first surface and the second surface; an optical member; and an attachment member 40 that has a stationary part 42 opposite to the first surface of the washer and a shank 41 at least partially inserted into the hole of the washer, and fixes the position of the optical member with respect to the substrate. The second surface of the washer has a projection 53 that projects toward the first surface at an angle, and the projection is in contact with an edge 35 of the hole of the substrate and is at least partially included in the hole of the substrate.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to optics, adjustment methods and washers.

In recent years, there has been a demand for further miniaturization of optical devices. For example, in an image pickup device, which is one of the optical devices, permissible errors such as the positional relationship between each lens and the positional relationship between the image pickup element and the objective lens are reduced as the pixel pitch is reduced.

In assembling the image pickup device, for example, the substrate on which the image pickup element is mounted may be fixed with an adhesive. In general, since the adhesive has a large coefficient of thermal expansion, the positional relationship between the image pickup device and the objective lens tends to change due to a temperature change. On the other hand, for example, Patent Document 1 discloses an image pickup apparatus that does not use an adhesive for fixing a substrate by providing an elastic body that urges the substrate to abut against a screw head attached to a lens holder.

Japanese Unexamined Patent Publication No. 2016-51087

Here, the image pickup device may be mounted on a vehicle. The image pickup device mounted on the vehicle is used in an environment where vibration is generated during traveling. In use in such an environment, the substrate is not sufficiently fixed by the urging by the elastic body, and the position of the image sensor may be displaced, so that the reliability is not sufficient.

An object of the present disclosure made in view of this aspect is to provide an optical device having high reliability, a method for adjusting the optical device, and a washer used in the optical device.

The optical device according to the embodiment of the present disclosure is
A board with holes and
A washer having a first surface, a second surface, and a hole penetrating the first surface and the second surface,
Optical members and
A mounting member having a fixing portion facing the first surface of the washer, a shaft portion through which at least a part thereof is passed through a hole of the washer, and fixing the position of the optical member with respect to the substrate. Prepare,
The second surface of the washer has a protrusion that projects at an angle to the first surface.
The protrusion is in contact with the edge of the hole in the substrate, and at least a part thereof is included in the hole in the substrate.

The adjustment method according to the embodiment of the present disclosure is
It has a substrate with holes, a first surface, a second surface having protrusions that project at an angle to the first surface, and holes penetrating the first surface and the second surface. A washer, an optical member, a fixing portion facing the first surface of the washer, and a mounting member for fixing the position of the optical member with respect to the substrate by a shaft portion through which at least a part is passed through a hole of the washer. Is a method of adjusting an optical device provided with,
By changing the contact position of the protrusion with respect to the edge of the hole in the substrate, the mounting angle of the optical member with respect to the substrate is adjusted.

The adjustment method according to the embodiment of the present disclosure is
It has a substrate with holes, a first surface, a second surface having protrusions that project at an angle to the first surface, and holes penetrating the first surface and the second surface. A washer, an optical member, a fixing portion facing the first surface of the washer, and a mounting member for fixing the position of the optical member with respect to the substrate by a shaft portion through which at least a part is passed through a hole of the washer. Is a method of adjusting an optical device provided with,
By changing the position of the shaft portion in the hole of the washer in the surface direction of the first surface, the mounting position of the optical member with respect to the substrate is adjusted.

The washer according to the embodiment of the present disclosure is
Used in an optical device that mounts an image sensor and includes a substrate having holes, an optical member including a lens, and a mounting member having a fixing portion and a shaft portion and fixing the position of the optical member with respect to the substrate. It ’s a washer
The first surface facing the fixed portion and
A second surface having a protrusion that projects at an angle with respect to the first surface,
It has a hole that penetrates the first surface and the second surface through which at least a part of the shaft portion is passed.
At least a part of the protruding portion is included in the hole of the substrate, and the position of contact with the edge portion of the hole of the substrate is adjusted so that the optical axis of the image pickup device and the lens can be aligned.

According to one embodiment of the present disclosure, a highly reliable optical device, a method for adjusting the optical device, and a washer used in the optical device are provided.

FIG. 1 is an exploded view showing the main elements of the optical device according to the embodiment of the present disclosure. FIG. 2 is an external view of the optical device according to the embodiment of the present disclosure. FIG. 3 is a cross-sectional view showing the main elements of the optical device according to the embodiment of the present disclosure. FIG. 4 is a diagram for explaining a mounting member and a washer of one configuration example. FIG. 5 is a diagram for explaining a mounting member and a washer of one configuration example. FIG. 6 is a diagram for explaining a mounting member and a washer of another configuration example. FIG. 7 is a diagram for explaining a mounting member of a comparative example.

(Structure of optical device)
FIG. 1 is an exploded view showing the main elements of the optical device 10 according to the embodiment of the present disclosure. FIG. 2 is an external view of the optical device 10. Further, FIG. 3 is a cross-sectional view showing the main elements of the optical device 10. FIG. 3 shows the main elements inside the housing and the like in the cross section of the optical device 10 in AA shown in FIG. In the present embodiment, the optical device 10 is an image pickup device. The optical device 10 is not limited to the image pickup device, and may be another device including an optical member such as a lens.

Here, as shown in FIGS. 1 to 3, Cartesian coordinates corresponding to the orientation of the optical device 10 are set. The z-axis direction is a direction parallel to the optical axis of the optical device 10. The optical device 10 captures a subject, which is an object existing in the positive direction of the z-axis, from the optical device 10. The positive direction of the z-axis may be expressed as the object side or the front. Further, the negative direction of the z-axis may be expressed as the image side or the rear. The y-axis direction corresponds to the width direction of the optical device 10. Further, the x-axis direction corresponds to the height direction of the optical device 10. In the following, the positional relationship may be described using the axes or planes of the Cartesian coordinates.

As shown in FIG. 1, the optical device 10 includes a second lens barrel 22, an image pickup optical system 20, a first lens barrel 21, an image pickup element cover 33, a frame 30, an image pickup element 31, and a substrate. 32 and a mounting member 40 are provided. Further, as shown in FIG. 2, the optical device 10 includes a front housing 12, a rear housing 13, and a wiring portion 11. Further, as shown in FIG. 3, the optical device 10 further includes a joining member 23 and a washer 50. That is, the optical device 10 has a structure in which the elements shown in FIGS. 1 and 3 are covered with the front housing 12 and the rear housing 13 shown in FIG. Details of the components included in the optical device 10 will be described later. Here, FIGS. 1 to 3 are examples. The optical device 10 does not have to include all of the components shown in FIGS. 1 to 3. Further, the optical device 10 may include components other than those shown in FIGS. 1 to 3.

The front housing 12 is a housing located in front of the optical device 10 and protects internal parts from impacts and the like. The front housing 12 has an opening that does not block the incident light to the image pickup optical system 20. The front housing 12 may be connected to the second lens barrel 22, for example, by fitting the opening of the front housing 12 with a part of the second lens barrel 22. The material of the front housing 12 is, for example, resin, but the material is not limited to resin.

The rear housing 13 is a housing located behind the optical device 10 and protects internal parts from impacts and the like. The position of the rear housing 13 may be fixed with respect to the front housing 12 with the elements shown in FIGS. 1 and 3 sandwiched between them. The rear housing 13 and the front housing 12 are connected by, for example, an adhesive, but may be connected by another method such as welding, fitting, or screwing. The material of the rear housing 13 is, for example, resin, but the material is not limited to resin.

The wiring unit 11 includes wiring including a power supply line to the optical device 10 and a signal line for outputting an image signal output by the image pickup device 31. The wiring of the wiring unit 11 may go out to the outside of the optical device 10 through the opening provided in the rear housing 13, and may be connected to an electronic device outside the optical device 10.

The imaging optical system 20 has at least one optical member and is designed to satisfy desired optical characteristics such as focal length and depth of focus. In the present embodiment, the image pickup optical system 20 includes lenses 201 to 205 as optical members. The imaging optical system 20 may further include a diaphragm, an optical filter, and the like.

The first lens barrel 21 is a member that holds a part of the lenses constituting the image pickup optical system 20. The first lens barrel 21 is arranged on the image side, that is, behind the second lens barrel 22. In this embodiment, the first lens barrel 21 holds the lenses 201-203. The lens 201, the lens 202, and the lens 203 may be those that converge the transmitted light.

The first lens barrel 21 has a tubular portion surrounding the optical axis of the imaging optical system 20 and a flange portion 21A protruding in a direction intersecting the optical axis of the imaging optical system 20. The flange portion 21A projects, for example, in the direction of a plane (xy plane) orthogonal to the optical axis of the imaging optical system 20. The flange portion 21A may have screw holes so that it can be screwed to the frame 30. The material of the first lens barrel 21 is, for example, resin, but the material is not limited to resin.

The second lens barrel 22 is a member that holds a part of the lenses constituting the image pickup optical system 20. The second lens barrel 22 is arranged on the object side, that is, in front of the first lens barrel 21. In this embodiment, the second lens barrel 22 holds the lens 204 and the lens 205. The lens 204 and the lens 205 may diffuse the transmitted light. The second lens barrel 22 has a cylindrical shape that surrounds the optical axis of the imaging optical system 20. The material of the second lens barrel 22 is, for example, resin, but the material is not limited to resin.

The joining member 23 is a member that joins the first lens barrel 21 and the second lens barrel 22. The joining member 23 adjusts the position of the second lens barrel 22 with respect to the first lens barrel 21 so that the image pickup device 31 can receive an image formed through the image pickup optical system 20. The joining member 23 joins the end portion of the first lens barrel 21 on the object side and the end portion of the second lens barrel 22 on the image side. The joining member 23 may be an adhesive capable of forming a predetermined thickness between the first lens barrel 21 and the second lens barrel 22.

The frame 30 is attached to the first lens barrel 21 and the substrate 32 on which the image pickup device 31 is mounted. The frame 30 has a space inside so as to accommodate at least a part of the first lens barrel 21. As shown in FIG. 1, the frame 30 is attached to the flange portion 21A of the first lens barrel 21 at the end portion on the object side by screwing. Further, the frame 30 is attached to the substrate 32 by the attachment member 40 accompanied by the washer 50. The material of the frame 30 is, for example, metal, but is not limited to metal.

The image pickup element cover 33 has an opening that does not block the subject image incident on the light receiving surface of the image pickup element 31 from the image pickup optical system 20. Further, the image sensor cover 33 prevents light from the surroundings other than the subject image from being incident on the light receiving surface of the image sensor 31. The material of the image pickup device cover 33 is, for example, resin, but the material is not limited to resin.

The image pickup element 31 is arranged on the image side of the image pickup optical system 20 so that a subject image formed via the image pickup optical system 20 can receive light. The image pickup device 31 takes an image of the subject image formed on the light receiving surface, converts it into an image signal, and outputs the image. As the image sensor 31, for example, a CCD (Charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like can be used.

The substrate 32 is a circuit board and mounts electronic components including at least an image pickup element 31. The image sensor 31 is mounted on the front surface of the substrate 32. That is, the substrate 32 is mounted so that the light receiving surface of the image pickup element 31 can receive the subject image to be imaged through the image pickup optical system 20. The position of the substrate 32 with respect to the frame 30 is fixed by the mounting member 40 with the image sensor cover 33 sandwiched between them.

The mounting member 40 is a member for mounting the substrate 32 to the frame 30. The mounting member 40 fixes the position of the optical member with respect to the substrate 32. The mounting member 40 can be, for example, a screw, a bolt, a nut and a combination of two or more thereof. The material of the mounting member 40 is, for example, metal, but is not limited to metal. Further, the material of the mounting member 40 preferably has a small coefficient of linear expansion. The metal used as the material of the mounting member 40 may be, for example, stainless steel having a coefficient of linear expansion of 16 or less. Details of the configuration of the mounting member 40 will be described later.

The washer 50 is a member that is used together with the mounting member 40 and has a function of making the mounting member 40 difficult to loosen. In the present disclosure, the washer 50 has a function of preventing the intrusion of the adhesive member 60 (see FIG. 4) described later. The material of the washer 50 is, for example, metal, but is not limited to metal. Further, the material of the washer 50 preferably has a small coefficient of linear expansion. The metal used as the material of the washer 50 may be, for example, stainless steel having a coefficient of linear expansion of 16 or less. The details of the configuration of the washer 50 will be described later.

(Details of mounting members and washers)
Here, for example, the conventional image pickup device that fixes the substrate 32 to the lens holder by urging with an elastic body has not been sufficiently reliable when used in a vehicle or the like. Therefore, by adhering the substrate 32 and the mounting member 40 using, for example, an adhesive member 60 such as an adhesive or solder, it is possible to avoid the positional deviation due to vibration. However, since the adhesive member 60 has a large coefficient of thermal expansion, it is necessary to prevent the positional relationship between the image pickup element 31 and the optical member from changing due to a temperature change of the adhesive member 60. The optical device 10 according to the present embodiment can reduce the influence of the temperature change of the adhesive member 60 by the following configuration including the washer 50.

4 and 5 are views for explaining the mounting member 40 and the washer 50 of one configuration example. 4 and 5 correspond to an enlarged diagram schematically showing the region P of FIG.

The washer 50 has a first surface 51, a second surface 52, and a hole 50H penetrating the first surface 51 and the second surface 52. The hole 50H may be provided in the center of the washer 50. The first surface 51 of the washer 50 is a flat surface. The second surface 52 of the washer 50 has a protrusion 53 that projects at an angle with respect to the first surface 51. A hole 50H may be provided at a position of the protruding portion 53 that protrudes most from the first surface 51, and has a shape having a linear or curved gradient from the hole 50H toward the first surface 51. You may be. For example, the protruding portion 53 may have a hemispherical shape with the first surface 51 as the bottom surface, or a cone such as a cone or a quadrangular pyramid, and a hole 50H may be provided at a position at the apex thereof. The protrusion 53 is a portion having a shape that is not parallel to the first surface 51 and has a gradient in the z-axis direction with respect to the first surface 51. In the present embodiment, the entire second surface 52 is the protruding portion 53, but only a part of the second surface 52 may be the protruding portion 53. That is, the washer 50 may have a shape in which the portion of the second surface 52 other than the protruding portion 53 is parallel to the first surface 51. Further, although the surface of the protrusion 53 is a curved surface in the present embodiment, it may be a flat surface. In other words, in the present embodiment, the cross section of the washer 50 is fan-shaped as shown in FIG. 4, but another example may be a triangle or a trapezoid. Further, the surface of the protrusion 53 may be a combination of a curved surface and a flat surface, a combination of a plurality of curved surfaces, or a combination of a plurality of flat surfaces.

The mounting member 40 includes a shaft portion 41 and a fixing portion 42. The shaft portion 41 is a shaft through which at least a part of the hole 50H of the washer 50 is passed. The fixing portion 42 faces the first surface 51 of the washer 50. When the mounting member 40 is mounted, the fixing portion 42 is in contact with the first surface 51 of the washer 50 without a gap. In the configuration example shown in FIGS. 4 and 5, the mounting member 40 is a screw having a form in which the shaft portion 41 and the fixing portion 42 cannot be separated. The shaft portion 41 corresponds to the body portion and the screw portion of the screw. Further, the fixing portion 42 corresponds to the head of the screw.

The substrate 32 has a hole 32H. The holes 32H are formed according to the number of mounting members 40, but it is preferably three or more for stable fixing. The hole 32H is not limited to a through hole whose circumference is surrounded by the substrate 32, and may include a notch hole or the like. Further, among the corners of the substrate 32 in contact with the hole 32H in the cross section, the one close to the fixing portion 42 may be referred to as "the edge portion 35 of the hole 32H of the substrate 32". In other words, the edge portion 35 is the edge portion of the hole 32H on the surface of the substrate 32 closer to the fixing portion 42. The position of the image pickup device 31 mounted on the board 32 is determined by the mounting position of the board 32 on the frame 30.

The frame 30 may be provided with a tap into which a part of the shaft portion 41 of the mounting member 40 is inserted. The position of the frame 30 determines the position of the optical member such as the lenses 2001 to 205 held by the first lens barrel 21 and the second lens barrel 22 fixed to the frame 30 with respect to the image sensor 31.

As shown in FIG. 4, the mounting member 40 is inserted into the tap of the frame 30 so that a part of the washer 50 is sandwiched between the fixing portion 42 and the substrate 32. The protruding portion 53 of the washer 50 is in contact with the edge portion 35 of the hole 32H of the substrate 32 without a gap, and at least a part thereof is included in the hole 32H of the substrate 32. As described above, the washer 50, the fixing portion 42, and the substrate 32 are adhered to each other by an adhesive member 60 such as solder or an adhesive as a countermeasure against misalignment. As shown in FIG. 4, at least a part of the protruding portion 53 is in contact with the adhesive member 60, but since there is no gap between the protruding portion 53 and the edge portion 35, the adhesive member 60 enters the hole 32H of the substrate 32. No. That is, the adhesive member 60 does not enter the hole 32H of the substrate 32 due to the protruding portion 53 of the washer 50.

FIG. 7 is a diagram for explaining the mounting member 40 of the comparative example. When the mounting member 40 is used without sandwiching the washer 50, if the substrate 32 is tilted even a little in order to adjust the position of the image pickup element 31 with respect to the optical member, the adhesive member 60 enters the hole 32H of the substrate 32. Then, the adhesive member 60 between the substrate 32 and the shaft portion 41 thermally expands, so that the position of the substrate 32 shifts in the xy direction with respect to the frame 30. That is, the positions of the optical members such as the lenses 2001 to 205 with respect to the image sensor 31 are displaced. As is clear from the comparison with the comparative example, in the optical device 10 of the present embodiment, the washer 50 prevents the adhesive member 60 from invading, so that the position of the substrate 32 can be prevented from shifting in the xy direction. Here, it is preferable that the protruding portion 53 has a shape in which the closer to the hole 50H of the washer 50, the larger the distance from the first surface 51 so as to abut without a gap with the edge portion 35.

(Adjustment method)
Further, in the present embodiment, the diameter of the shaft portion 41 is smaller than the diameter of the hole 50H of the washer 50. That is, in the xy plane direction, the shaft portion 41 has a gap with respect to the hole 50H. Therefore, by changing the position of the shaft portion 41 in the hole 50H in the xy direction, it is possible to adjust the position of the optical axis of the image pickup device 31 and the lenses 201 to 205 in the xy direction. That is, by changing the position of the shaft portion 41 in the hole 50H of the washer 50 in the plane direction of the first surface 51, the mounting position of the optical member such as the lenses 201 to 205 with respect to the substrate 32 can be adjusted.

Then, as shown in FIG. 5, since the protruding portion 53 has a shape having an angle with respect to the first surface 51, the substrate 32 can be appropriately used by changing the contact position between the protruding portion 53 and the edge portion 35. Can be tilted to. That is, the angle of the image sensor 31 with respect to the optical axis of the lenses 201 to 205 can be adjusted by changing the contact position between the protruding portion 53 and the edge portion 35. By adjusting the position of the shaft portion 41 in the hole 50H and the position where the protruding portion 53 and the edge portion 35 abut, the x-axis direction, the y-axis direction, the z-axis direction, and the rotation direction with respect to these axes (pan, At least multiple directions of tilt and roll) can be adjusted. That is, by changing the contact position of the protruding portion 53 with respect to the edge portion 35 of the hole 32H of the substrate 32, the mounting angle of the optical member such as the lenses 201 to 205 with respect to the substrate 32 can be adjusted. Through such adjustments, the lenses 201 to 205 of the image pickup optical system 20 are aligned with the image pickup element 31 mounted on the substrate 32 in terms of the optical axis. Aligning the optical axis of the image sensor 31 and the lenses 201 to 205 means that the optical axis is located in the center of the light receiving surface of the image sensor 31 or within a desired range, and the angle between the light receiving surface and the optical axis is vertical. Or it means to keep it within a desired range. After the optical axis is aligned, the washer 50, the fixing portion 42, and the substrate 32 may be firmly adhered by the adhesive member 60 so that the position of the substrate 32 with respect to the frame 30 is maintained. Further, the tap portion of the shaft portion 41 of the frame 30 and the mounting member 40 may be adhered to each other.

As is clarified in comparison with the comparative example, the optical device 10 of the present embodiment is provided with the above configuration, so that even if the adhesive member 60 is used, the position shift of the image pickup device 31 due to the influence thereof can be avoided, which is high. It is possible to have reliability.

Although the present disclosure has been described with reference to the drawings and embodiments, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. It should be noted, therefore, that these modifications and modifications are within the scope of this disclosure. For example, the functions included in each means and the like can be rearranged so as not to be logically inconsistent, and a plurality of means and the like can be combined or divided into one.

In the above, the mounting member 40 has been described as being a screw. For example, as shown in FIG. 6, the mounting member 40 may have a configuration including a shaft portion 41 and a fixing portion 42 which is a nut. Further, the washer 50 may be provided on the surface (sensor surface) side on which the image pickup device 31 of the substrate 32 is mounted. When the washer 50, the fixing portion 42, and the substrate 32 are fixed by the adhesive member 60 on the sensor surface side, it is not necessary to consider the linear expansion of the substrate 32, so that it is easy to calculate the crossing of the optical axis deviation when the temperature changes. Become. Further, as shown in FIG. 6, in the composition, when the substrate 32 has a sufficient thickness, the hole 50H may be a recess instead of a through hole.

10 Optical device 11 Wiring part 12 Front housing 13 Rear housing 20 Imaging optical system 21 First lens barrel 21A Flange portion 22 Second lens barrel 23 Joining member 30 Frame 31 Imaging element 32 Board 32H hole 33 Imaging element cover 35 Edge 40 Mounting member 41 Shaft 42 Fixing 50 Washer 50H Hole 51 First surface 52 Second surface 53 Protruding part 60 Adhesive member 201 Lens 202 Lens 203 Lens 204 Lens 205 Lens

Claims (12)

A board with holes and
A washer having a first surface, a second surface, and a hole penetrating the first surface and the second surface,
Optical members and
A mounting member having a fixing portion facing the first surface of the washer, a shaft portion through which at least a part thereof is passed through a hole of the washer, and fixing the position of the optical member with respect to the substrate. Prepare,
The second surface of the washer has a protrusion that projects at an angle to the first surface.
An optical device in which the protrusion is in contact with an edge of a hole in the substrate, and at least a part thereof is included in the hole in the substrate. The optical device according to claim 1, wherein the diameter of the shaft portion is smaller than the diameter of the hole of the washer. The optical device according to claim 1 or 2, wherein the protrusion is closer to the hole of the washer and the distance from the first surface is larger. The optical device according to any one of claims 1 to 3, wherein the protruding portion has a part of a hemispherical shape having the first surface as a bottom surface. The optical device according to any one of claims 1 to 3, wherein the protruding portion has a shape of a part of a cone having the first surface as a bottom surface. The optical device according to any one of claims 1 to 5, wherein the optical member includes a lens having an optical axis aligned with an image pickup element mounted on the substrate. The optical device according to any one of claims 1 to 6, further comprising an adhesive member for adhering the mounting member and the substrate. The optical device according to claim 7, wherein the protruding portion is at least partially in contact with the adhesive member. The optical device according to claim 7 or 8, wherein the adhesive member does not enter the inside of the hole of the substrate. It has a substrate with holes, a first surface, a second surface having protrusions that project at an angle to the first surface, and holes penetrating the first surface and the second surface. A washer, an optical member, a fixing portion facing the first surface of the washer, and a mounting member for fixing the position of the optical member with respect to the substrate by a shaft portion through which at least a part is passed through a hole of the washer. Is a method of adjusting an optical device provided with,
An adjustment method for adjusting the mounting angle of the optical member with respect to the substrate by changing the contact position of the protrusion with respect to the edge of the hole in the substrate. It has a substrate with holes, a first surface, a second surface having protrusions that project at an angle to the first surface, and holes penetrating the first surface and the second surface. A washer, an optical member, a fixing portion facing the first surface of the washer, and a mounting member for fixing the position of the optical member with respect to the substrate by a shaft portion through which at least a part is passed through a hole of the washer. Is a method of adjusting an optical device provided with,
An adjustment method for adjusting the mounting position of the optical member with respect to the substrate by changing the position of the shaft portion in the hole of the washer in the surface direction of the first surface. Used in an optical device that mounts an image sensor and includes a substrate having holes, an optical member including a lens, and a mounting member having a fixing portion and a shaft portion and fixing the position of the optical member with respect to the substrate. It ’s a washer
The first surface facing the fixed portion and
A second surface having a protrusion that projects at an angle with respect to the first surface,
It has a hole that penetrates the first surface and the second surface through which at least a part of the shaft portion is passed.
A washer in which at least a part of the protrusion is included in a hole in the substrate and the optical axis of the image sensor and the lens can be aligned by adjusting the position of contact with the edge of the hole in the substrate.

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