JP6806991B2 - The camera module - Google Patents

Description

The present invention relates to a camera module.

Conventionally, thin camera-equipped devices equipped with a camera module, such as smartphones and digital cameras, have been known. The camera module includes a lens unit having one or more lenses and an image pickup element that captures a subject image imaged by the lens unit. In a camera module having a zoom function, the lens unit includes a fixed lens unit on which light from a subject is incident, a variable lens unit that changes the focal length, and a movable lens unit that includes a compensator lens that corrects the focal position.

Further, a camera module having a prism provided in a fixed lens portion and a bending optical system for bending incident light from a subject to guide the incident light to a movable lens portion and an image sensor in a subsequent stage has also been proposed (for example, Patent Document 1 and 2). The camera module disclosed in Patent Documents 1 and 2 has a structure in which an optical system including a lens unit and an image sensor is incorporated in a housing. By adopting a bending optical system, it is possible to reduce the thickness of the camera-mounted device.

Japanese Unexamined Patent Publication No. 2010-181684 Japanese Patent No. 5294024

In recent years, there has been a demand for further miniaturization and thinning of camera-mounted devices. However, in a structure such as the camera module disclosed in Patent Documents 1 and 2, in which the rigidity of the camera module needs to be ensured by the housing, the thickness of the housing is further reduced to reduce the size and thickness. That is difficult.

An object of the present invention is to provide a camera module that can be further miniaturized and thinned.

The camera module according to one aspect of the present invention includes a fixed lens portion and a movable lens portion, and includes a lens portion that focuses light from a subject to form an image.
An imaging unit that captures a subject image imaged by the lens unit,
The first case for holding the fixed lens portion and
A second case for holding the imaging unit and
It has a first side surface portion and a second side surface portion arranged parallel to each other and separated from each other, and a connecting portion for connecting the first side surface portion and the second side surface portion, and has the first case and the second side surface portion. A cover to which the first side surface portion and the second side surface portion are fixed to the side end of the case,
A housing composed of the first case, the second case, and the cover and having a rectangular parallelepiped shape as a whole,
It is provided with four guide shafts parallel to each other, to which the first case is connected to one end and the second case is connected to the other end.
The movable lens unit, and characterized by comprising a movable in the optical axis direction, the four guide the second lens unit and the third lens unit which is slidably mounted on at least two of the shafts To do.

According to the present invention, since the rigidity of the camera module is ensured by the guide shaft, the thickness of the housing for accommodating the optical system can be reduced. Therefore, the camera module can be further miniaturized and thinned.

It is a perspective view which shows the camera module which concerns on embodiment. It is a perspective view which shows the camera module which concerns on embodiment. It is an exploded perspective view which shows the camera module. It is a figure which shows the rigid body structure of a camera module. It is a figure which shows the optical system of a camera module. It is a figure which shows the mounting mode of the 1st lens part. It is a figure which shows the 2nd lens part. It is a figure which shows the 3rd lens part. It is a figure which shows the image sensor unit. It is a figure which shows the position detection part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 are perspective views showing a camera module 1 according to an embodiment of the present invention. 1B and 2B show a state in which the printed wiring boards 71 and 72 are removed. FIG. 3 is an exploded perspective view showing the camera module 1.

The camera module 1 is mounted on a thin camera-equipped device such as a smartphone, a mobile phone, a digital camera, a notebook computer, a tablet terminal, a portable game machine, or an in-vehicle camera. The camera module 1 has a zoom function for enlarging or reducing the subject image.

In explaining the structure of the camera module 1 of the present embodiment, a Cartesian coordinate system (X, Y, Z) is used. Also in the figure described later, it is shown by a common Cartesian coordinate system (X, Y, Z). The camera module 1 is mounted so that, for example, the X direction is the horizontal direction, the Y direction is the vertical direction, and the Z direction is the front-rear direction when shooting is actually performed by the camera-mounted device. The light from the subject is incident from the − side (minus side) in the Z direction, bends, and is guided to the + side (plus side) in the Y direction. By reducing the thickness of the camera module 1 in the Z direction, the thickness of the camera-mounted device can be reduced.

As shown in FIGS. 1 to 3, the camera module 1 includes a lens unit 10, an image sensor unit 20, a housing 30, a guide shaft 40, a lens drive unit 50, a position detection unit 60, and printed wiring boards 71 and 72. Be prepared.

The housing 30 is composed of a first case 31, a second case 32, and a cover 33, and has a rectangular parallelepiped shape as a whole. The first case 31 and the second case 32 are connected by a guide shaft 40. FIG. 4 shows a rigid body structure of the camera module 1 including the first case 31, the second case 32, and the guide shaft 40.

The first case 31 has a first lens accommodating portion 31a for holding the first lens portion 11 and a cover arranging portion 31b in which the cover 33 is arranged (see FIG. 4). The cover arranging portion 31b is formed so as to be recessed from the periphery by the thickness of the cover 33. Further, the first case 31 has engaging pieces 31c that engage with the engaging pieces 32d of the second case 32 on both sides in the X direction of the end faces that come into contact with the second case 32.

In the second case 32, the image sensor unit accommodating portion 32a for holding the image sensor unit 20, the flat plate portion 32b forming one XY surface (here, the surface on the Z direction − side) of the housing 30, and the printed wiring board 72 are provided. It has an FPC arrangement portion 32c to be arranged and a lens accommodating portion 32f in which a fourth lens portion 14 (see FIG. 5) is arranged (see FIG. 4). The FPC arrangement portion 32c is formed so as to be recessed from the periphery by the thickness of the printed wiring board 72. Further, the second case 32 has engaging pieces 32d that engage with the engaging pieces 31c of the first case 31 on both sides in the X direction of the end faces of the flat plate portion 32b that come into contact with the first case 31.

By engaging the engaging piece 31c of the first case 31 and the engaging piece 32c of the second case 32, the first case 31 and the second case 32 are connected. Further, the first case 31 and the second case 32 are connected by a guide shaft 40 extending in the Y direction. The guide shaft 40 is composed of four shafts parallel to each other, that is, a first guide shaft 41, a second guide shaft 42, a third guide shaft 43, and a fourth guide shaft 44. The material and outer diameter of the guide shaft 40 are designed so that the rigidity of the camera module 1 is ensured. The rigidity of the camera module 1 is mainly ensured by the guide shaft 40.

The first guide shaft 41 and the second guide shaft 42 are mainly used to guide the second lens portion 12 and the third lens portion 13. The third guide shaft 43 and the fourth guide shaft 44 are used to prevent rotation of the second lens portion 12 and the third lens portion 13 around the axis and to stabilize the posture (so-called counter shaft).

The cover 33 has an L-shaped connecting portion 33c that connects the side surface portions 33a and 33b forming the side surface of the housing 30 and the side surface portions 33a and 33b. The connecting portion 33c forms the other XY surface (here, the Z direction + side) of the housing 30. The cover 33 is arranged so that the portion of the connecting portion 33c along the X direction is located at the cover arranging portion 31b of the first case 31, and the side of the first case 31 and the second case 32 together with the motor frame 53 by the bolt 54. It is fixed to the ends 31d and 32e. The portion of the connecting portion 33c along the Y direction covers the Z direction + side of the lens driving portion 50. The XY surfaces of the first case 31, the second case 32, and the cover 33 are flush with each other. The lens portion 10 is exposed from the notch portion of the connecting portion 33c.

The lens unit 10 is a so-called zoom lens capable of supporting wide-angle shooting (focal length: short) to telephoto shooting (focal length: long). FIG. 5 shows the optical system of the camera module 1 including the lens unit 10 and the image sensor unit 20. The lens unit 10 has a first lens unit 11, a second lens unit 12, a third lens unit 13, and a fourth lens unit 14 in this order from the subject side (Y direction − side) (see FIG. 5).

The first lens unit 11 has a group 1 lens 111 including a prism 111a and lenses 111b and 111c (see FIG. 6), and a group 1 lens holder 112 for holding the group 1 lens 111. The mounting mode of the first lens portion 11 is shown in FIG. As shown in FIG. 6, the first lens portion 11 is fixed to the first lens accommodating portion 31a of the first case 31. The first lens unit 11 bends the incident light from the subject and guides the light to the second lens unit 12. That is, the camera module 1 has a bending optical system. As a result, the thickness of the camera-mounted device can be reduced.

The group 1 lens holder 112 has a shape that fits into the first lens accommodating portion 31a of the first case 31. The group 1 lens holder 112 has a recess 112a on the side surface. By engaging the concave portion 112a with the convex portion 31e on the inner surface of the first lens accommodating portion 31a, the first lens portion 11 is positioned and mounted with respect to the first case 31. The adjustment of the optical axis in the first lens unit 31a is performed independently before mounting on the first case 31. As a result, the lens performance can be maximized.

The second lens unit 12 has a second group lens holder 122 for holding the second group lens 121 and a second group lens 121, and an aperture unit 123. The detailed configuration of the second lens unit 12 is shown in FIG. The second group lens 121 is a variator lens that moves on the optical axis at the time of scaling to change the focal length of the entire lens system. The second lens unit 12 moves to the first lens unit 11 side, for example, in the case of scaling from the wide-angle end to the telephoto end.

The holder 122 for a second group lens has a second group lens accommodating portion 122a for accommodating the second group lens 121, a shaft insertion hole 122b to 122d into which the guide shaft 40 is inserted, and a shaft grip portion 122e. The shaft insertion holes 122b and 122c are arranged on the X direction − side of the second group lens accommodating portion 122a, and the shaft insertion hole 122d and the shaft grip portion 122e are arranged on the X direction + side of the second group lens accommodating portion 122a. The first guide shaft 41 is inserted through the shaft insertion hole 122b, the second guide shaft 42 is inserted through the shaft insertion hole 122c, the third guide shaft 43 is inserted through the shaft insertion hole 122d, and the fourth guide is inserted into the shaft grip portion 122e. The shaft 44 is inserted. The second lens portion 12 slides on the guide shafts 41 to 44 and moves in the optical axis direction.

The coil spring 45 inserted through the first shaft 41 comes into contact with the holder 122 for the second group lens. The holder 122 for the second group lens is urged to the + side in the Y direction by the coil spring 45. As a result, the rattling of the engaging nut 513 is reduced, so that the second lens portion 12 can be moved with high accuracy. The coil spring 46 inserted through the second shaft 42 penetrates the shaft insertion hole 122c of the holder 122 for the second group lens.

The Z direction + side of the second group lens accommodating portion 122a is notched, and is an opening 122f where the D cut portion 121a of the second group lens 121 is exposed. The second group lens 121 is arranged so that the D cut portion 121a is located at the opening 122f of the holder 122 for the second group lens. By forming the opening 122f so that the peripheral portion of the opening 122f of the holder 122 for the second group lens and the D-cut portion 121a are flush with each other, the thickness of the holder 122 for the second group lens 122 in the Z direction is reduced. be able to.

The diaphragm portion 123 moves integrally with the second group lens 121 and the second group lens holder 122, and adjusts the amount of light to be guided to the third lens portion 13. Specifically, the diaphragm portion 123 includes a base member 123a having an opening located on the optical axis, a diaphragm blade (not shown) that opens and closes in the opening of the base portion 123a, and a diaphragm drive unit 123b that drives the diaphragm blade. Have. The diaphragm drive unit 123b is electrically connected to the printed wiring board 71, and power supply and diaphragm control are performed via the printed wiring board 71.

The third lens unit 13 has a third group lens 131 and a third group lens holder 132 that holds the third group lens 131. The detailed configuration of the third lens unit 13 is shown in FIG. The third group lens 131 is a compensator lens that corrects the focus shift due to the magnification change. The third lens unit 13 moves on the optical axis in conjunction with the movement of the second lens unit 12.

The holder 132 for the third group lens has a third group lens accommodating portion 132a for accommodating the third group lens 131, a shaft insertion hole 132c into which the guide shaft 40 is inserted, and shaft grip portions 132b and 132d. The shaft grip portion 132b and the shaft insertion hole 132c are arranged on the X direction − side of the third group lens accommodating portion 132a, and the shaft grip portion 132d is arranged on the X direction + side of the third group lens accommodating portion 132a. The first guide shaft 41 is inserted through the shaft grip portion 132b, the second guide shaft 42 is inserted through the shaft insertion hole 132c, and the third guide shaft 43 is inserted through the shaft grip portion 132d. The fourth guide shaft 44 is not inserted into the holder 132 for the third group lens. The third lens unit 13 slides on the guide shafts 41 to 43 and moves in the optical axis direction.

The coil spring 46 inserted through the second shaft 42 penetrates the shaft insertion hole 122c of the second group lens holder 122 and comes into contact with the third group lens holder 132. The holder 132 for the third group lens is urged to the + side in the Y direction by the coil spring 46. As a result, the rattling of the engaging nut 523 is reduced, so that the third lens portion 13 can be moved with high accuracy.

The fourth lens unit 14 is a proximity lens (four-group lens) close to the light receiving surface of the image sensor unit 20. The fourth lens portion 14 is fixed to the fourth group lens accommodating portion 32f of the second case 32. The fourth lens unit 14 performs shake correction (OIS: Optical Image Stabilization) by, for example, using the driving force of a voice coil motor (VCM) to swing the fourth group lens in the plane orthogonal to the optical axis. It may have a configuration.

The image sensor unit 20 is arranged in the image sensor unit accommodating portion 32a of the second case 32 in the vicinity of the optical axis direction imaging side (Y direction + side) of the fourth lens unit 14 (proximity lens), and is adhered, for example. Is fixed by. The image sensor unit 20 includes an image sensor 21, a substrate 22, a glass portion 23, and an overmold portion 24. The detailed configuration of the image sensor unit 20 is shown in FIG.

The image sensor 21 is composed of, for example, a CCD (charge-coupled device) type image sensor, a CMOS (complementary metal oxide semiconductor) type image sensor, or the like. The image sensor 21 is mounted on the substrate 22 and is electrically connected to the wiring on the substrate 22 via a bonding wire (not shown). The image sensor 21 takes an image of the subject image formed by the lens unit 10 and outputs an electric signal corresponding to the subject image. A printed wiring board 72 is electrically connected to the substrate 22 of the image sensor unit 20, and power is supplied to the image sensor 21 and an electric signal output of the subject image captured by the image sensor 21 is output via the printed wiring board 72. Will be done.

The glass portion 23 is made of a transparent glass material having a refractive index larger than that of air, and is arranged on the image pickup element 21 so as to cover the image pickup area of the image pickup element 21. By arranging the glass portion 23 in the image pickup area of the image pickup element 21, the numerical aperture NA (= n · sinθ) becomes large and the diffraction limit becomes small, which is suitable for increasing the resolution. Further, when the image sensor unit 20 is mounted on the camera module 1, it is possible to prevent dust from adhering to the image pickup area of the image sensor 21, so that good image quality can be realized.

The overmolded portion 24 is formed by molding on the peripheral edge of the substrate 22 so as to surround the periphery of the glass portion 23 excluding the light receiving surface 23a. The overmolded portion 24 is made of a hard resin material (for example, epoxy resin) having a high light-shielding property, and reinforces the glass portion 23. Since the overmolded portion 24 is formed including the arrangement region of the bonding wire (not shown) and can be finished to be the same as the outer size of the substrate 22, the size can be reduced. Further, the overmolded portion 24 is also filled in a small gap around the image pickup device 21 to ensure high light-shielding property, so that light scattering can be suppressed.

An infrared cut filter (infrared cut layer) may be arranged on the exposed surface of the glass portion 23 that is not covered by the overmolded portion 24, that is, the light receiving surface 23a of the glass portion 23.

The lens drive unit 50 includes a drive unit 51 for a second group lens that moves the second lens unit 12, and a drive unit 52 for a third group lens that moves the third lens unit 13. The lens driving unit 50 is arranged at an edge portion of the camera module 1 along the Y direction.

The drive unit 51 for the second group lens has a motor 511, a drive shaft 512, and an engagement nut 513. One end of the drive shaft 512 is rotatably supported by the support block 514. The engaging nut 513 engages with the engaging portion 122g (see FIG. 5) of the holder 122 for the second group lens. The feed screw mechanism converts the rotary motion of the drive shaft 512 into a linear motion of the engaging nut 513. The linear motion of the engaging nut 513 is transmitted to the holder 122 for the second group lens, so that the second lens portion 12 moves in the optical axis direction. A printed wiring board 71 is electrically connected to the motor 511, and signals related to power supply and driving are input and output via the printed wiring board 71. The operation of the second group lens drive unit 51 (motor 511) is controlled by the control unit (not shown), so that the second lens unit 12 moves along the guide shaft 40 by a predetermined distance. This changes the focal length.

The drive unit 52 for the third group lens has a motor 521, a drive shaft 522, and an engagement nut 523, similarly to the drive unit 51 for the second group lens. One end of the drive shaft 522 is rotatably supported by the support block 524. The engaging nut 523 engages with the engaging portion 132e (see FIG. 5) of the third group lens holder 132. The feed screw mechanism converts the rotary motion of the drive shaft 522 into a linear motion of the engaging nut 523. The linear motion of the engaging nut 523 is transmitted to the holder 132 for the third group lens, so that the third lens portion 13 moves in the optical axis direction. A printed wiring board 71 is electrically connected to the motor 512, and signals related to power supply and driving are input and output via the printed wiring board 71. By controlling the operation of the drive unit 52 for the third group lens by the control unit (not shown), the third lens unit 13 moves on the optical axis by a predetermined distance. As a result, the focus shift caused by the movement of the second lens unit 12 is corrected.

The outer peripheral surface of the camera module 1 is covered with a light-shielding film (not shown) having a thickness of about 0.03 mm, except for the light receiving surface of the lens 111b of the first lens unit 11. The light-shielding film (not shown) is adhered to the first case 31, the second case 32, and the cover 33 by, for example, double-sided tape (adhesive layer). The light-shielding film (not shown) is separated from the second lens portion 12 and the third lens portion 13 by the thickness of the adhesive layer. Therefore, the light-shielding film (not shown) does not hinder the movement of the second lens portion 12 and the third lens portion 13 (movable lens portion). By covering the outer peripheral surface of the camera module 1 with a light-shielding film (not shown), the module height can be suppressed and the ambient light can be suppressed as compared with the case where the outer peripheral surface of the camera module 1 is covered with a resin mold or a metal plate. The effect of can be minimized.

The position detection unit 60 is a position detection unit for a second group lens 61 that detects the position of the second lens unit 12 in the optical axis direction, and a position detection unit for a third group lens that detects the position of the third lens unit 13 in the optical axis direction. It has 62. The position detection unit 60 is electrically connected to the printed wiring board 71 via an opening (reference numeral omitted) provided in the flat plate portion 32b of the second case 32. The detailed configuration of the position detection unit 60 is shown in FIG. In FIG. 10, the second case 32 is omitted.

The position detection unit 61 for the second group lens and the position detection unit 62 for the third group lens have origin detection sensors 611 and 621 and position detection sensors 612 and 622, respectively. The origin detection sensors 611 and 621 and the position detection sensors 612 and 622 are composed of, for example, an optical sensor (so-called reflective photoreflector) having a light emitting portion and a light receiving portion in one semiconductor package.

The origin detection sensors 611 and 621 detect a predetermined portion (for example, the end face in the Y direction) of the holder 122 for the second group lens and the holder 132 for the third group lens, respectively. The detection positions by the origin detection sensors 611 and 621 are set as reference positions (origins) in the optical axis direction of the second lens unit 12 and the third lens unit 13, respectively.

The position detection sensors 612 and 622 detect the current positions (displacements from the reference position) of the second lens unit 12 and the third lens unit 13 in the optical axis direction, respectively. Specifically, the position detection sensors 612 and 622 are arranged to face the optical scales 122h and 132f arranged on the Z-direction-side surface of the holder 122 for the second group lens and the holder 132 for the third group lens, respectively. The lens. The position detection sensors 612 and 622 irradiate the optical scales 122h and 132f with light, receive the light reflected by the optical scales 122h and 132f, and based on the intensity of the reflected light, the second lens portions 12 and 3 The current position of the lens unit 13 in the optical axis direction is detected.

In the camera module 1, drive control of the motors 511 and 521 is performed based on the detection signals of the position detection sensors 612 and 622 at the time of scaling (so-called closed loop control). Therefore, the response performance is high, and the variable magnification operation (zoom operation of the second lens unit 12 and autofocus operation of the third lens unit 13) can be speeded up.

As described above, the camera module 1 includes the first lens unit 11 (fixed lens unit), the second lens unit 12, and the third lens unit 13 (movable lens unit), and focuses the light from the subject to form an image. A lens unit 10, an image pickup element unit 20 (imaging unit) that captures an image of a subject imaged by the lens unit 10, a first case 31 that holds the first lens unit 11, and a first image element unit 20 that holds the image pickup element unit 20. The second lens unit includes two cases 32, four guide shafts 40 (41 to 44) parallel to each other, to which the first case 31 is connected to one end and the second case 32 is connected to the other end. The 12 and the third lens portion 13 are attached to the guide shaft 40 so as to be movable in the optical axis direction.

According to the camera module 1, since the rigidity of the camera module 1 is ensured by the guide shaft 40, the thickness of the housing 30 (first case 31 and second case) accommodating the lens portion 10 (optical system) is reduced. can do. Therefore, the camera module 1 can be further miniaturized and thinned.

When the lens portion 10 is housed inside the housing 30, if there are two guide shafts for guide purposes, it can be moved in the optical axis direction while preventing rotation around the axis. Then, four guide shafts 41 to 44, which are not necessarily necessary for guide use, are arranged. As a result, the rigidity can be ensured even if the thickness of the first case 31 and the second case 32 forming the housing 30 is reduced. In other words, since the rigidity is ensured by the four guide shafts 41 to 44, the thickness of the first case 31 and the second case 32 can be reduced.

Although the invention made by the present inventor has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment and can be changed without departing from the gist thereof.

For example, the second lens unit 12 and the third lens unit 13 are slid on at least two of the four guide shafts 41 to 44 (preferably two arranged on opposite sides of the optical axis). It suffices if it is movably attached.

Further, for example, depending on the design of the lens unit 10, the aperture unit 123 may be deleted and a fixed aperture function may be added to the holder 122 for the second group lens, or a member having a fixed aperture function may be added.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Camera module 10 Lens section 11-14 1st lens section to 4th lens section 20 Image sensor unit 30 Housing 31 1st case 32 2nd case 33 Cover 40 Guide shaft 41-44 1st guide shaft to 4th guide shaft 50 Lens drive unit 60 Position detection unit 71, 72 Printed wiring board

Claims (7)

A lens unit that includes a fixed lens unit and a movable lens unit and that focuses light from the subject to form an image.
An imaging unit that captures a subject image imaged by the lens unit,
The first case for holding the fixed lens portion and
A second case for holding the imaging unit and
It has a first side surface portion and a second side surface portion arranged parallel to each other and separated from each other, and a connecting portion for connecting the first side surface portion and the second side surface portion, and has the first case and the second side surface portion. A cover to which the first side surface portion and the second side surface portion are fixed to the side end of the case,
A housing composed of the first case, the second case, and the cover and having a rectangular parallelepiped shape as a whole,
It is provided with four guide shafts parallel to each other, to which the first case is connected to one end and the second case is connected to the other end.
The movable lens unit, and characterized by comprising a movable in the optical axis direction, the four guide the second lens unit and the third lens unit which is slidably mounted on at least two of the shafts Camera module to do. A lens unit that includes a fixed lens unit and a movable lens unit and that focuses light from the subject to form an image.
An imaging unit that captures a subject image imaged by the lens unit,
The first case for holding the fixed lens portion and
A second case for holding the imaging unit and
A lens driving unit that is arranged on one side of the optical axis and drives the movable lens unit,
It is provided with four guide shafts parallel to each other, to which the first case is connected to one end and the second case is connected to the other end.
The movable lens portion is composed of a second lens portion and a third lens portion that are slidably attached to at least two of the four guide shafts so as to be movable in the optical axis direction.
The at least two guide shafts to which the second lens portion and the third lens portion are slidably attached are arranged on the same side as the lens driving portion with respect to the optical axis. The featured camera module. The fixed lens portion has a first lens portion that bends light from a subject and guides the light to the movable lens portion.
The movable lens unit includes a second lens unit for changing the focal length by moving along the optical axis during zooming,
The camera module of claim 1 or claim 2, characterized in that perforated with the third lens unit for correcting the focus shift caused by zooming, the. The first lens unit includes a 1-group lens including a prism and a 1-group lens holder for holding the 1-group lens.
A claim characterized in that the first lens portion is positioned with respect to the first case by engaging the engaging portion of the first group lens holder with the engaging portion of the first case. Item 3. The camera module according to item 3 . The second lens unit includes a second group lens having a D-shaped cross section and a holder for a second group lens that holds the second group lens.
The holder for the second group lens has a notch or an opening where the D-cut portion of the second group lens is exposed.
The camera module according to any one of claims 1 to 4, wherein the notch or the peripheral portion of the opening of the second group lens holder is flush with the D-cut portion. .. The camera module according to any one of claims 1 to 5 , wherein the second lens portion has a diaphragm portion for adjusting the amount of light to be guided. Any of claims 1 to 6, wherein a light-shielding film is provided which is adhered to the first case and the second case via an adhesive layer and covers an opening of a housing including the first case and the second case. The camera module described in item 1.

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