JP2019061180A - Lens assembly, imaging apparatus and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens assembly capable of preventing deterioration of optical characteristics and reduction of yield due to insertion of a dimming unit. A lens assembly includes a lens 21 to 25 and a lens holder 10 for holding the lens 21 to 25. The lens holder 10 has a first holding portion 31 so as to form an insertion space S into which the aperture portion 51 can be inserted between the rear lens surface 22R of the second lens 22 and the front lens surface 23F of the third lens 23. It has a connecting portion 33 for connecting to the second holding portion 32. The rear lens surface 22R of the second lens 22 includes an effective lens surface 61 and a guide surface 63 located radially outside the effective lens surface 61. The front lens surface 23F of the third lens 23 includes an effective lens surface 71 and a guide surface 73 located radially outside the effective lens surface 71. The guide surfaces 63 and 73 are located closer to the insertion space S than any of the effective lens surfaces 61 and 71, respectively. [Selection diagram] FIG. 9

Description

  The present invention relates to a lens assembly, an imaging device, and an electronic device, and more particularly to a lens assembly in which a light control unit such as a diaphragm or a shutter is inserted between lenses.

  Recently, a camera module (imaging device) is incorporated in various electronic devices such as a smartphone, a tablet computer, and a drone. In such a camera module, a light control unit such as a diaphragm or a shutter may be inserted between lenses (see, for example, Patent Document 1).

  With the recent demand for downsizing of electronic devices, there is also a demand for downsizing of camera modules incorporated in electronic devices, and the distance between lenses in the camera module is becoming narrower (for example, 0. 0). 3 mm to 0.4 mm). Therefore, when the light control unit is inserted between the lenses when assembling the camera module, the light control unit may contact the lens surface, which may damage the lens surface or shift the position of the lens. is there. In such a case, the optical characteristics of the camera module may be degraded and the yield may be reduced.

JP-A-11-38467

  The present invention has been made in view of the problems of the prior art as described above, and it is an object of the present invention to provide a lens assembly which can prevent the deterioration of optical characteristics and the reduction of yield due to the insertion of a light control part. The purpose of

  The second object of the present invention is to provide an imaging device with good optical characteristics.

  Furthermore, a third object of the present invention is to provide an electronic apparatus including an imaging device with good optical characteristics.

  According to a first aspect of the present invention, there is provided a lens assembly capable of preventing deterioration in optical characteristics and reduction in yield due to the insertion of a light control part. The lens assembly includes a first lens group including at least one lens, a second lens group including at least one lens, and the first lens group and the second lens group along an optical axis. And a lens holder for holding the The lens holder includes a first holding unit for holding the first lens group, a second holding unit for holding the second lens group, a rear lens surface of the first lens group, and the first lens unit. And a connecting portion connecting the first holding portion and the second holding portion so as to form an insertion space in which the light control portion can be inserted between the second lens group and the front lens surface of the second lens group. The rear lens surface of the first lens group is a first effective lens surface including the range of the effective diameter of the rear lens surface, and a first lens surface located radially outward of the first effective lens surface. And a guide surface. The first guide surface is located closer to the insertion space than any part of the first effective lens surface. The front lens surface of the second lens group is a second effective lens surface including the range of the effective diameter of the front lens surface, and a second lens surface located radially outward of the second effective lens surface. And a guide surface. The second guide surface is located closer to the insertion space than any part of the second effective lens surface.

  With such a configuration, the first lens group and the second lens group are held in a positioned state by the lens holder, and the light control is performed between the positioned first lens group and the second lens group. You can insert a part. When the light control unit is inserted between the first lens unit and the second lens unit, even if the light control unit is inserted in a state of being shifted in the optical axis direction, A guide surface is formed radially outward of the respective effective lens surfaces of the rear lens surface and the front lens surface of the second lens group, and the guide surface is located closer to the insertion space than these effective lens surfaces. Is brought into contact with the guide surface before coming into contact with the effective lens surface, and the light control portion is prevented from coming into contact with the effective lens surface and being damaged. Therefore, it is possible to prevent the deterioration of the optical characteristics and the reduction of the yield due to the insertion of the light control part.

  It is preferable that the first guide surface and / or the second guide surface extend perpendicularly to the optical axis. Such a first guide surface or a second guide surface extending perpendicularly to the optical axis not only prevents the light control unit from coming into contact with the effective lens surface as described above, but It is also possible to position in the optical axis direction.

  It is preferable that the rear lens surface of the first lens group further includes a first outer tapered surface that gradually extends away from the insertion space as it goes radially outward from the first guide surface. Preferably, the front lens surface of the second lens group further includes a second outer tapered surface which gradually extends away from the insertion space as it goes radially outward from the second guide surface. It is preferable that the rear lens surface of the first lens group further includes a first inner tapered surface that gradually extends away from the insertion space as moving radially inward from the first guide surface. It is preferable that the front lens surface of the second lens group further includes a second inner tapered surface that gradually extends away from the insertion space as it goes radially inward from the second guide surface. By forming such an outer tapered surface and / or an inner tapered surface, even when the light control portion is shifted in the optical axis direction when inserted into the insertion space, the light control portion becomes an outer tapered surface in the process of insertion. Since the guide is guided to the guide surface, the insertion operation of the light control unit becomes easy.

  It is preferable that the connection portion of the lens holder includes a guide portion for guiding the light control portion to be inserted into the insertion space. By forming such a guide portion at the connecting portion of the lens holder, the light control portion can be inserted while being guided by the guide portion, so the insertion operation of the light control portion becomes easier.

  According to a second aspect of the present invention, an imaging device with good optical characteristics is provided. The imaging apparatus includes the lens assembly described above, a blade, and a light control unit inserted into the insertion space of the lens assembly, and driving the blade causes the first part of the lens assembly to be moved. A blade driving unit for adjusting light incident on the second lens group by transmitting through the first lens group, and imaging disposed on a surface on which the light transmitted through the second lens group of the lens assembly forms an image And an element.

  According to a third aspect of the present invention, there is provided an electronic apparatus including an imaging device with good optical characteristics. The electronic device includes the imaging device described above.

  According to the present invention, the first lens group and the second lens group are held in a positioned state by the lens holder, and the light control is performed between the positioned first lens group and the second lens group. You can insert a part. Further, when the light control unit is inserted between the first lens group and the second lens group, it is possible to prevent the light control unit from being in contact with the effective lens surface and being damaged.

FIG. 1 is a perspective view showing a smartphone incorporating an imaging device according to an embodiment of the present invention. FIG. 2 is a perspective view showing a lens module in the imaging device shown in FIG. FIG. 3 is an exploded perspective view of the lens module shown in FIG. FIG. 4 is a longitudinal sectional view of the lens module shown in FIG. FIG. 5 is a longitudinal sectional view of the lens holder of the lens module shown in FIG. FIG. 6 is a cross-sectional view of the lens holder of the lens module shown in FIG. FIG. 7 is a longitudinal sectional view of a second lens of the lens module shown in FIG. FIG. 8 is a longitudinal sectional view of the third lens of the lens module shown in FIG. FIG. 9 is a partially broken perspective view showing the process of assembling the lens module shown in FIG.

  Hereinafter, an embodiment of an electronic device including a lens assembly according to the present invention will be described in detail with reference to FIGS. 1 to 9. Note that, in FIG. 1 to FIG. 9, the same or corresponding components are given the same reference numerals, and duplicate explanations are omitted. In addition, in FIGS. 1 to 9, the scale and dimensions of each component may be exaggerated and shown, or some components may be omitted.

  FIG. 1 is a perspective view showing a smartphone 1 as an example of an electronic device according to the present invention, and a camera 2 as an imaging device according to the present invention is incorporated inside the smartphone 1. As shown in FIG. 1, the camera 2 includes a lens module 3 embedded in the back of the smartphone 1 and an imaging element (not shown) disposed on an imaging surface on which light transmitted through the lens module 3 forms an image. Is equipped. The electronic device according to the present invention is not limited to the smart phone as described in the present embodiment, and the present invention can be applied to various electronic devices such as a tablet computer, a laptop computer, and a drone. .

  2 is a perspective view showing the lens module 3, FIG. 3 is an exploded perspective view, and FIG. 4 is a longitudinal sectional view. As shown in FIGS. 2 to 4, the lens module 3 includes a plurality of lenses 21 to 25, a lens holder 10 for holding the lenses 21 to 25, a blade drive unit 12 for driving blades, and a lens holder 10 and the cover body 14 attached to the blade drive unit 12. The lens assembly according to the present invention is composed of lenses 21 to 25 and a lens holder 10 holding these lenses 21 to 25. In the present embodiment, five lenses 21 to 25 are held by the lens holder 10, but the number of lenses held by the lens holder 10 is not limited to this. In the present specification, the object side is defined as “front” or “front” along the optical axis (X axis), and the imaging surface side as “rear” or “rear”.

  FIG. 5 is a longitudinal sectional view of the lens holder 10 holding the lenses 21 to 25. FIG. 6 is a transverse sectional view. As shown in FIGS. 3 to 6, the lens holder 10 includes a cylindrical first holding portion 31 for holding two lenses 21 and 22, and a cylindrical first holding portion 31 for holding three lenses 23 to 25. The second holding portion 32 and two connecting portions 33 and 33 connecting the first holding portion 31 and the second holding portion 32 are provided. The second holding portion 32 has an outer diameter larger than that of the first holding portion 31. The two lenses 21 and 22 (the first lens 21 and the second lens 22) held by the first holder 31 constitute, for example, a first lens group 41 having positive refractive power, and the second lens The three lenses 23 to 25 (the third lens 23, the fourth lens 24, and the fifth lens 25) held by the holding unit 32 constitute, for example, a second lens group 42 having negative refractive power.

  As shown in FIGS. 5 and 6, a flange 34 extending radially inward is provided at the front end of the first holding portion 31 of the lens holder 10. The outer peripheral edge 21P of the first lens 21 is in contact with the rear end surface of the flange 34 of the first holding portion 31, whereby positioning of the first lens 21 in the optical axis direction (X direction) is performed. Further, the outer peripheral edge 22P of the second lens 22 is in contact with the rear end surface of the outer peripheral edge 21P of the first lens 21, whereby the positioning of the second lens 22 in the optical axis direction is performed. Further, on the inner peripheral surface of the first holding portion 31, steps are formed corresponding to the outer diameter of the first lens 21 and the outer diameter of the second lens 22, and the first lens 21 and the second lens 22 are formed. Are respectively fitted on the inner peripheral side of the first holding portion 31. By fitting the first lens 21 and the second lens 22 into the first holding portion 31 as described above, the positioning of the first lens 21 and the second lens 22 in the direction perpendicular to the optical axis is performed.

  As shown in FIG. 6, the connecting portion 33 of the lens holder 10 extends radially inward of the inner diameter of the front edge of the second holding portion 32. The outer peripheral edge 23P of the third lens 23 is in contact with the rear end face of the radially inward connecting portion 33, whereby the optical axis direction (X direction) of the third lens 23 is positioned. There is. The outer peripheral edge 24P of the fourth lens 24 is in contact with the rear end face of the outer peripheral edge 23P of the third lens 23, whereby the positioning of the fourth lens 24 in the optical axis direction is performed. Further, the outer peripheral edge 25P of the fifth lens 25 is in contact with the rear end surface of the outer peripheral edge 24P of the fourth lens 24, whereby the positioning of the fifth lens in the optical axis direction is performed.

  A step is formed on the inner peripheral surface of the second holding portion 32 in correspondence with the outer diameter of the third lens 23, the outer diameter of the fourth lens 24, and the outer diameter of the fifth lens 25. The lens 23, the fourth lens 24, and the fifth lens 25 are fitted into the inner peripheral side of the second holding portion 32, respectively. As described above, the third lens 23, the fourth lens 24, and the fifth lens 25 are fitted into the second holding portion 32, respectively, whereby the third lens 23, the fourth lens 24, and the fifth lens 25 are obtained. Positioning in the direction perpendicular to the optical axis is performed.

  Thus, the first lens group 41 (that is, the first lens 21 and the second lens 22) is accommodated in the first holding portion 31 of the lens holder 10 in a state of being positioned, and the second holding is performed. The second lens group 42 (that is, the third lens 23, the fourth lens 24, and the fifth lens 25) is accommodated in the inside of the portion 32 in a state where the second lens group 42 is positioned. Then, as shown in FIG. 4, the first lens 21, the second lens 22, the third lens 23, the fourth lens 24, the fifth lens sequentially from the object side to be imaged toward the imaging surface along the optical axis. A lens 25 is disposed. For example, a glass filter (not shown) may be disposed between the fifth lens 25 and the imaging device.

  The blade drive unit 12 adjusts the light transmitted through the first lens group 41 and incident on the second lens group 42 by driving the blades, and in the present embodiment, a diaphragm blade is used to It is configured to narrow the light incident on the second lens group 42. Specifically, as shown in FIG. 3, the blade drive unit 12 drives the diaphragm unit (light control unit) 51 in which two diaphragm blades (not shown) are accommodated, and the diaphragm blades. The drive circuit and the drive mechanism are accommodated in the base 52, and the frame parts 53 and 53 which each extend to the side of the lens holder 10 from the base 52 are included. The diaphragm unit 51 is formed with an opening 54 through which light passes. The two diaphragm blades housed in the diaphragm unit 51 are driven to close the opening 54 of the diaphragm unit 51, whereby an arbitrary opening diameter is realized. The narrowed portion 51 may be changed to a predetermined opening diameter at each stage, or may be able to change the opening diameter steplessly.

  The throttling portion 51 in the present embodiment extends from the upper surface 52A of the base 52 in the + Z direction, and the frame portion 53 extends from the base 52 substantially in parallel with the throttling portion 51. The front side surface 53 </ b> A of the frame portion 53 is substantially parallel to the side surface 33 </ b> A of the connecting portion 33 of the lens holder 10.

  As shown in FIG. 4, in the present embodiment, the diaphragm unit 51 is disposed between the first lens group 41 and the second lens group 42, that is, between the second lens 22 and the third lens 23. ing. Between the second lens 22 and the third lens 23, the diaphragm unit 51 is inserted into a gap formed between the second lens 22 and the third lens 23 as described later when assembling the lens module 3. The diaphragm unit 51 is disposed in the

More specifically, as shown in FIG. 5, the thickness D in the X direction of the connecting portion 33 of the lens holder 10 is slightly larger than the thickness T _D in the X direction of the diaphragm 51 (see FIG. 3). It has become. Further, as shown in FIG. 6, the shortest distance W along the Y direction between the two connecting portions 33 and 33 of the lens holder 10 (the distance between the guide portions 35 and 35 described later) It is slightly larger than the directional width T _w (see FIG. 3). As described above, the connecting portion 33 of the lens holder 10 forms an insertion space S (see FIG. 5) into which the diaphragm portion 51 of the blade driving unit 12 can be inserted between the second lens 22 and the third lens 23. It is done. As described later, the throttling portion 51 of the blade driving portion 12 is inserted in the + Z direction into the insertion space S.

  Next, lens surfaces positioned before and after the insertion space S will be described. FIG. 7 is a longitudinal sectional view of the second lens 22, and FIG. 8 is a longitudinal sectional view of the third lens 23. As shown in FIG.

  As shown in FIG. 7, the lens surface located in front of the insertion space S, that is, the rear lens surface 22R of the second lens 22 is an effective lens surface including the range of the effective diameter of the rear lens surface 22R (first effective lens Surface 61, an inner tapered surface (first inner tapered surface) 62 located radially outward of the effective lens surface 61, and a guide surface (first guide surface) located radially outward of the inner tapered surface 62 63 and an outer tapered surface (first outer tapered surface) 64 located radially outward of the guide surface 63. The guide surface 63 extends perpendicularly to the optical axis, and is located rearward (that is, on the + X direction side) of any portion of the effective lens surface 61. The inner tapered surface 62 is a surface that extends radially inward from the guide surface 63, and gradually inclines or curves in the −X direction as it goes inward in the radial direction. The outer tapered surface 64 is a surface extending radially outward from the guide surface 63, and is gradually inclined or curved toward the −X direction as it goes radially outward.

  As shown in FIG. 8, the lens surface located behind the insertion space S, that is, the front lens surface 23F of the third lens 23, includes the range of the effective diameter of the front lens surface 23F (second effective lens surface Surface) 71, an inner tapered surface (second inner tapered surface) 72 located radially outward of the effective lens surface 71, and a guide surface (second guide surface) located radially outward of the inner tapered surface 72 73 and an outer tapered surface (second outer tapered surface) 74 located radially outward of the guide surface 73. The guide surface 73 extends perpendicularly to the optical axis, and is located in front of any portion of the effective lens surface 71 (that is, on the −X direction side). The inner tapered surface 72 is a surface that extends radially inward from the guide surface 73, and is gradually inclined or curved toward the + X direction side as it goes inward in the radial direction. The outer tapered surface 74 is a surface extending radially outward from the guide surface 73, and is gradually inclined or curved toward the + X direction as it goes radially outward.

  When assembling the lens module 3 having such a configuration, the first lens 21 and the second lens 22 are fitted in the first holding portion 31 of the lens holder 10 described above, and the third lens 23 is held in the second holding portion 32. , The fourth lens 24 and the fifth lens 25 are fitted to make a lens assembly. Then, the diaphragm unit 51 of the blade driving unit 12 is inserted into the insertion space S (see FIG. 5) formed by the connecting unit 33 of the lens holder 10. At this time, the diaphragm unit 51 is inserted from the −Z direction side of the lens holder 10 in the + Z direction.

  Here, when the diaphragm unit 51 contacts the effective lens surface 61 of the second lens 22 or the effective lens surface 71 of the third lens 23 when inserting the diaphragm unit 51 into the insertion space S, the effective lens surface 61 Or 71 is damaged, leading to deterioration of optical characteristics and reduction of yield. The present embodiment is to prevent such deterioration of the optical characteristics and the reduction of the yield.

  For example, consider the case where the diaphragm unit 51 is inserted into the insertion space S in a state of being shifted in the −X direction. In the present embodiment, the guide surface 63 located in the + X direction relative to the effective lens surface 61 is formed on the outer side of the effective lens surface 61 of the second lens 22. Therefore, as shown in FIG. Since the diaphragm 51 shifted to the right contacts the guide surface 63 before contacting the effective lens surface 61 of the second lens 22, the diaphragm 51 may contact the effective lens surface 61 and be damaged. It is prevented.

  Further, since the outer tapered surface 64 is formed on the outer side of the guide surface 63 of the second lens 22, the tip 51 A of the aperture 51 is inserted when the aperture 51 is shifted in the −X direction. After contacting the outer tapered surface 64 at the entrance side of the insertion space S (see FIG. 9), the outer tapered surface 64 is guided by the outer tapered surface 64 to reach the guide surface 63. Therefore, the diaphragm portion 51 can be smoothly guided to the insertion space S, and the insertion operation of the diaphragm portion 51 becomes easy. In addition, since the inner tapered surface 62 is also formed inside the guide surface 63 of the second lens 22, when the tip 51A of the diaphragm 51 inserted in the insertion space S is further moved in the + Z direction, the diaphragm After the tip end 51A of the portion 51 comes in contact with the inner tapered surface 62 on the outlet side of the insertion space S, it is guided by the inner tapered surface 62 and reaches the guide surface 63. Insertion work becomes easy.

  Similarly, on the outer side of the effective lens surface 71 of the third lens 23, a guide surface 73 positioned in the −X direction relative to the effective lens surface 71 is formed. Therefore, when the diaphragm 51 is inserted in the + X direction, the diaphragm 51 comes into contact with the guide surface 73 before coming into contact with the effective lens surface 71 of the third lens 23. It is prevented that the part 51 contacts the effective lens surface 71 and is damaged.

  Further, since the outer tapered surface 74 is formed on the outer side of the guide surface 73 of the third lens 23 and the inner tapered surface 72 is formed on the inner side, the diaphragm portion 51 is inserted in the + X direction In addition, since the tip end 51A of the narrowed portion 51 is guided by the outer tapered surface 74 and the inner tapered surface 72 and reaches the guide surface 73, the inserting operation of the narrowed portion 51 is facilitated.

  Further, as shown in FIG. 9, the connecting portion 33 of the lens holder 10 has a guide portion 35 extending in parallel with the side surface 51 B of the diaphragm portion 51, and between the guide portions 35 and 35 opposed in the Y direction. The throttling unit 51 is inserted. Therefore, when the diaphragm 51 is inserted into the insertion space S, the side surface 51B of the diaphragm 51 is in sliding contact with the guide 35 of the connecting portion 33, and the diaphragm 51 is guided by the guide 35 of the connecting 33 Ru.

  As described above, the diaphragm unit 51 of the blade drive unit 12 is inserted into the insertion space S of the lens holder 10. At this time, the diaphragm portion 51 is inserted into the lens holder 10 while the side surface 53A (see FIG. 3) of the frame portion 53 of the blade drive portion 12 is in sliding contact with the side surface 33A of the connecting portion 33 of the lens holder 10. Then, when the first holding portion 31 of the lens holder 10 abuts on the upper surface 52 A of the base portion 52 of the blade drive portion 12, the lens holder 10 is fixed to the blade drive portion 12 with an adhesive. Thereafter, the cover body 14 is attached from the + Z direction side of the lens holder 10 and the blade drive unit 12, and the cover body 14 is fixed to the lens holder 10 and the blade drive unit 12 by an adhesive, for example. Thus, the lens module 3 shown in FIG. 2 is completed.

  In the present embodiment, the guide surface 63 of the second lens 22 and the guide surface 73 of the third lens 23 extend perpendicularly to the optical axis (Z direction). Therefore, positioning of the diaphragm unit 51 in the optical axis direction is also performed when the diaphragm unit 51 of the blade drive unit 12 abuts on the guide surface 63 of the second lens 22 or the guide surface 73 of the third lens 23 as described above. . As described above, the guide surfaces 63 and 73 can not only prevent the diaphragm 51 from coming into contact with the effective lens surfaces 61 and 71, but also can position the diaphragm 51 in the optical axis direction.

  The shape of the inner tapered surface 62 or 72 described above is not limited to the illustrated one, as long as it gradually extends away from the insertion space S as it goes radially inward from the guide surface 63 or 73. It may be Similarly, the shape of the outer tapered surface 64 or 74 is not limited to that illustrated either, as long as it gradually extends away from the insertion space S as it goes radially outward from the guide surface 63 or 73. It may be one.

  Although the above-mentioned embodiment demonstrated the example which used the diaphragm part 51 which adjusts an aperture diameter with a diaphragm blade as a light control part which adjusts the light which permeate | transmitted the 1st lens group 41, what was restricted to this Instead, for example, a shutter unit that shuts off light from the first lens group 41 by a shutter blade, a filter that transmits a predetermined wavelength attached to the blade, and a filter switching unit that switches the filter are used in the light control unit described above. You can also.

  The terms "upper", "front", "back", "front", "back", and other terms used in the present specification are used in the context of the illustrated embodiment. And change according to the relative positional relationship of the devices.

  Although the preferred embodiments of the present invention have been described above, it is needless to say that the present invention is not limited to the above-described embodiments and may be implemented in various different forms within the scope of the technical idea thereof.

1 Smartphone (Electronic Equipment)
2 Camera (imaging device)
DESCRIPTION OF SYMBOLS 3 lens module 10 lens holder 12 blade drive part 14 cover body 21 1st lens 22 2nd lens 22R back lens surface 23 3rd lens 23F front lens surface 24 4th lens 25 5th lens 31 1st holding part 32 2nd Holding portion 33 Connection portion 34 Flange 35 Guide portion 41 First lens group 42 Second lens group 51 Aperture portion (light control portion)
52 base 53 frame portion 54 opening 61 (first) effective lens surface 62 (first) inner tapered surface 63 (first) guide surface 64 (first) outer tapered surface 71 (second) effective lens Surface 72 (second) inner tapered surface 73 (second) guide surface 74 (second) outer tapered surface S insertion space

Claims (10)

A first lens group including at least one lens;
A second lens group including at least one lens;
A lens holder configured to hold the first lens group and the second lens group along an optical axis;
The lens holder is
A first holding unit that holds the first lens group;
A second holding unit that holds the second lens group;
The first holding portion and the second holding portion form an insertion space in which a light control portion can be inserted between the rear lens surface of the first lens group and the front lens surface of the second lens group. And a connecting portion for connecting the holding portion,
The rear lens surface of the first lens group is:
A first effective lens surface including a range of the effective diameter of the rear lens surface;
A first guide surface located radially outward of the first effective lens surface, the first guide surface located closer to the insertion space than any portion of the first effective lens surface; Including
The front lens surface of the second lens group is
A second effective lens surface including a range of effective diameters of the front lens surface;
A second guide surface located radially outward of the second effective lens surface, the second guide surface being located closer to the insertion space than any portion of the second effective lens surface; including,
Lens assembly.   The lens assembly according to claim 1, wherein the first guide surface extends perpendicularly to the optical axis.   The lens assembly according to claim 1, wherein the second guide surface extends perpendicularly to the optical axis.   The rear lens surface of the first lens group further includes a first outer tapered surface that gradually extends away from the insertion space as going radially outward from the first guide surface. The lens assembly according to any one of the preceding claims.   The front lens surface of the second lens group further includes a second outer tapered surface that gradually extends away from the insertion space as moving radially outward from the second guide surface. The lens assembly according to any one of the preceding claims.   The rear lens surface of the first lens group further includes a first inner tapered surface that gradually extends away from the insertion space as moving radially inward from the first guide surface. The lens assembly according to any one of the preceding claims.   The front lens surface of the second lens group further includes a second inner tapered surface that gradually extends away from the insertion space as moving radially inward from the second guide surface. The lens assembly according to any one of the preceding claims.   The lens assembly according to any one of claims 1 to 7, wherein the connection portion of the lens holder includes a guide portion for guiding the light adjustment portion inserted into the insertion space. A lens assembly according to any one of claims 1 to 8;
And a light control unit inserted into the insertion space of the lens assembly including a blade, and driving the blade transmits the first lens group of the lens assembly to transmit the second lens. A blade drive for adjusting light incident on the group;
An imaging device disposed on a surface on which light transmitted through the second lens group of the lens assembly forms an image;   An electronic apparatus comprising the imaging device according to claim 9.

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