WO2019244571A1

WO2019244571A1 - Lens barrel and imaging device

Info

Publication number: WO2019244571A1
Application number: PCT/JP2019/020986
Authority: WO
Inventors: 優太中村
Original assignee: 日本電産コパル株式会社
Priority date: 2018-06-19
Filing date: 2019-05-28
Publication date: 2019-12-26
Also published as: JP2019219486A

Abstract

This lens barrel includes: a ring-shaped waterproof seal having elasticity; a plate-shaped first optical member having a first contact surface in contact with the waterproof seal; a lens frame having a cylindrical portion that accommodates the first optical member; and a second optical member which has a second contact surface in contact with the waterproof seal and is located near the first optical member, wherein the waterproof seal urges each of the first contact surface, the second contact surface, and the cylindrical portion.

Description

Lens barrel and imaging device

One embodiment of the present invention relates to a lens barrel or the like used for an imaging device such as a camera.

In an imaging apparatus, an optical system including a plurality of lenses may be used. Such an imaging device is disclosed, for example, in Patent Document 1.

JP 2007-155760 A

使用 There are various usage environments for imaging devices such as smartphones and cameras mounted on automobiles and digital cameras. Specifically, it is used not only in a favorable environment such as sunny weather, but also in a severe environment such as rainy weather, high temperature or low temperature. In the imaging device of Patent Document 1, measures against distortion due to thermal expansion of a lens due to a change in environmental temperature are taken. However, since no waterproofing measures are taken, there is a demand for an imaging device having a simple configuration and having high waterproofness while reducing the load on optical members such as lenses or filters due to thermal expansion.

The present invention employs the following means to solve the above-mentioned problems and the like. In the following description, reference numerals and the like in the drawings are added in parentheses to facilitate understanding of the invention, but each component of the present invention is not limited to these additions, and the present invention is not limited thereto. It should be widely interpreted to a technically understandable range by the trader.

One means of the present invention is:
An annular waterproof seal (11) having elasticity;
A plate-shaped first optical member (21) having a first contact surface (21a) in contact with the waterproof seal;
A lens frame (12) having a cylindrical portion (12a) for housing the first optical member;
A second optical member (22) having a second contact surface (22a) in contact with the waterproof seal, and located next to the first optical member.
The waterproof seal urges each of the first contact surface, the second contact surface, and the cylindrical portion,
It is a lens barrel.

According to the lens barrel having the above configuration, for example, even when the first optical member expands or contracts due to a change in environmental temperature, the first contact surface of the first optical member and the second contact surface of the second optical member. When the waterproof seal urging the surface is deformed, the expansion or contraction of the first optical member can be absorbed. Thereby, the load applied to the optical member such as the lens or the filter can be reduced, so that distortion of the lens, cracking of the lens, cracking of the lens coating, and the like can be prevented. Further, since the waterproof seal further urges the cylindrical portion to seal the space between the first optical member and the cylindrical portion, it is possible to more reliably prevent moisture from entering the inside of the lens frame. it can. That is, both a distortion countermeasure and a waterproof countermeasure can be realized by one waterproof seal. Therefore, with a simple configuration, it is possible to enhance waterproofness while reducing the load on the optical member due to thermal expansion.

In the lens barrel, preferably,
The first optical member is a first lens,
The second optical member is a second lens located on the opposite side of the subject from the first optical member.

According to the lens barrel having the above configuration, it is possible to prevent moisture from entering the opposite side of the subject from the first lens.

In the lens barrel, preferably,
A third optical member (13) directly or indirectly fixed to the lens frame and located on a side opposite to the second optical member with respect to the first optical member;
The first optical member is urged along the optical axis direction by the waterproof seal to come into contact with the third optical member.

According to the lens barrel having the above configuration, the first optical member can be pressed in the optical axis direction by the third optical member rigidly fixed to the lens frame. It can be determined based on three optical members. Thereby, the first optical member can be arranged at the designed position on the lens frame.

In the lens barrel, preferably,
The third optical member is applied to the lens frame along the optical axis direction.

According to the lens barrel having the above configuration, the accuracy of the position of the third optical member in the optical axis direction with respect to the lens frame and the inclination of the third optical member with respect to the lens frame can be improved. The dimensional accuracy of the cylindrical portion of the lens frame can be improved. Thereby, the accuracy of the position of each optical member in the optical axis direction in the cylindrical portion of the lens frame can be improved, so that a lens system having high resolution can be realized. In particular, for example, when the first optical member is the first lens, it is possible to effectively improve the accuracy of the position of the first lens that corresponds to the third optical member in the optical axis direction.

In the lens barrel, preferably,
Further comprising one or more optical members (22, 23, 24) in addition to the first optical member;
The first optical member and the one or more optical members are urged along the optical axis direction by the waterproof seal.

According to the lens barrel having the above configuration, the countermeasure against distortion of two or more optical members can be achieved by one waterproof seal, so that the number of parts can be reduced and the structure of the lens barrel can be simplified. The manufacturing process of the lens barrel can be prevented from becoming complicated, and the manufacturing cost can be reduced.

In the lens barrel, preferably,
Further comprising one or more optical members in addition to the first optical member,
The first optical member is located closest to the subject.

According to the lens barrel having the above configuration, it is possible to prevent moisture from entering the first optical member, so that a wider space inside the lens frame can be waterproofed.

いずれ Either of the above-mentioned lens barrels is suitably applied to an imaging device such as a camera.

According to the imaging device having the above configuration, for example, even when the first optical member expands or contracts due to a change in environmental temperature, the first contact surface of the first optical member and the second contact surface of the second optical member. The deformation of the waterproof seal urging the surface can absorb the expansion or contraction of the first optical member. Thereby, the load applied to the optical member such as the lens or the filter can be reduced, so that distortion of the lens, cracking of the lens, cracking of the lens coating, and the like can be prevented. Further, since the waterproof seal further urges the cylindrical portion to seal the space between the first optical member and the cylindrical portion, it is possible to more reliably prevent moisture from entering the inside of the lens frame. it can. That is, both a distortion countermeasure and a waterproof countermeasure can be realized by one waterproof seal. Therefore, with a simple configuration, the waterproofness can be enhanced while reducing the load on the optical member due to thermal expansion.

FIG. 1 is an exploded perspective view of the lens barrel of the present embodiment. FIG. 2 is a cross-sectional view of the lens barrel of the present embodiment.

The lens barrel according to the present invention includes a ring-shaped waterproof seal having elasticity, a plate-shaped first lens having a first contact surface that is in contact with the waterproof seal, a lens frame having a cylindrical portion that houses the first optical member, and a waterproof. A second optical member having a second contact surface in contact with the seal, and a second optical member positioned adjacent to the first optical member, wherein the waterproof seal comprises a first contact surface, a second contact surface, and a cylindrical portion. Is one of the features.

In this specification, the central position of the lens, which is the central position of the light incident on the image sensor, is referred to as “optical axis”. An imaging target located on the opposite side of the lens from the imaging element is referred to as a “subject”. The direction in which the subject is located with respect to the image sensor is referred to as "front side" or "forward in the optical axis direction", and the direction in which the image sensor is located relative to the subject is referred to as "rear side" or "rearward in the optical axis direction".

An embodiment according to the present invention will be described according to the following configuration. However, the embodiments described below are merely examples of the present invention, and do not limit the technical scope of the present invention. In the drawings, the same components are denoted by the same reference numerals, and description thereof may be omitted.
1. Embodiment 2 FIG. Supplementary information

<1. Embodiment>
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the lens barrel of the present embodiment. FIG. 2 is a cross-sectional view of the lens barrel of the present embodiment. FIG. 1 is a diagram viewed from the front side.

Each drawing shows the x-axis, y-axis and z-axis. An axis parallel to the optical axis of the lens and facing the subject when viewed from the imaging device is defined as a “z-axis”. An axis perpendicular to the z-axis is defined as "x-axis". An axis perpendicular to both the z axis and the x axis is defined as a "y axis". Here, the x-axis, the y-axis, and the z-axis form right-handed three-dimensional orthogonal coordinates. Hereinafter, the direction of the arrow on the z-axis may be referred to as the z-axis plus side, and the direction opposite to the arrow may be referred to as the z-axis minus side. That is, along the z-axis, the + side of the z-axis is “front side” or “forward in the optical axis direction”, and the − side of the z-axis is “rear side” or “backward in the optical axis direction”.

As shown in FIGS. 1 and 2, the imaging apparatus according to the present embodiment includes the lens barrel 1, the substrate 41, and the imaging element 42. Note that FIG. 1 does not show the substrate 41 and the image sensor 42. The lens barrel 1 includes a waterproof packing 11, a lens frame 12, a holding ring 13, a spacing ring 16, a first lens 21, a second lens 22, a third lens 23, and a fourth lens 24.

<Substrate 41>
As shown in FIG. 2, the substrate 41 is a rigid substrate which is located on the opposite side of the subject from the lens barrel 1 and on which electronic components including the image sensor 42 are mounted. The imaging element 42 is a specific example of the “imaging unit” according to the present invention. The imaging element 42 is a photoelectric conversion element that converts irradiated light into an electric signal, and is, for example, a C-MOS sensor or a CCD, but is not limited thereto. Further, in the imaging device, an imaging unit that requires an imaging function other than the imaging element 42 may be employed. The electrical signal acquired by the image sensor 42 is subjected to predetermined electrical processing or signal processing by electronic components mounted on the substrate 41, and then output as image data outside the imaging device.

<Waterproof packing 11>
As shown in FIGS. 1 and 2, the waterproof packing 11 is an annular member having elasticity. In the present embodiment, the waterproof packing 11 is provided between the first lens 21 and the second lens 22. The waterproof packing 11 is an annular member formed of an elastic member such as rubber, for example, and has an outer diameter that is substantially the same as the diameter of a large-diameter portion 12c of the lens frame 12 described later. The waterproof packing 11 is a specific example of the “waterproof seal” in the present invention.

<Lens frame 12>
The lens frame 12 is configured to include a cylindrical portion 12a. In the present embodiment, the lens frame 12 is formed of, for example, resin or metal. The cylindrical portion 12a has a cylindrical shape extending around the optical axis and extending in the optical axis direction. Specifically, a large-diameter portion 12c, a small-diameter portion 12d, and a tapered portion 12e are formed on the inner surface of the cylindrical portion 12a so as to be continuous in this order toward the rear side. The large diameter portion 12c has a cylindrical shape with the optical axis as the central axis. The inner surface of the large diameter portion 12c includes a third contact surface 12f that is in contact with the waterproof packing 11 over one circumference. The small diameter part 12d has a diameter smaller than the diameter of the large diameter part 12c, and has a cylindrical shape with the optical axis as the central axis. The tapered portion 12e has a diameter smaller than the diameter of the small-diameter portion 12d on the front side, and has a shape expanding toward the rear side with the optical axis as a center. The step 12b is formed between the small diameter portion 12d and the tapered portion 12e, and has an annular flat surface facing the front side.

The cylindrical portion 12a houses the first lens 21, the second lens 22, the third lens 23, and the fourth lens 24. In the present embodiment, the first lens 21 is the lens located closest to the subject among the first lens 21, the second lens 22, the third lens 23, and the fourth lens 24. The second lens 22 is located on the opposite side of the subject from the first lens 21 and next to the first lens 21 with the waterproof packing 11 interposed therebetween. Specifically, the first lens 21, the waterproof packing 11, the second lens 22, the spacing ring 16, the third lens 23, and the fourth lens 24 are formed in the cylindrical portion 12a so as to be continuous in this order toward the rear side. Housed inside.

<Third lens 23 and fourth lens 24>
More specifically, the third lens 23 and the fourth lens 24 are cylindrical lenses having an outer diameter smaller than the diameter of the small diameter portion 12d and larger than the diameter on the front side of the tapered portion 12e. The third lens 23 and the fourth lens 24 are formed of, for example, resin or glass. The fourth lens 24 is provided inside the small-diameter portion 12d such that the outer peripheral surface faces the inner surface of the small-diameter portion 12d, and the rear side contacts the step 12b. The third lens 23 is provided inside the small-diameter portion 12d such that the outer peripheral surface faces the inner surface of the small-diameter portion 12d and the rear side contacts the fourth lens 24. The third lens 23 and the fourth lens 24 are specific examples of the “optical member” in the present invention.

<Interval ring 16>
In the present embodiment, the spacing ring (spacer) 16 is an annular member formed of, for example, resin or metal, and has an outer diameter smaller than the diameter of the large diameter portion 12c and larger than the diameter of the small diameter portion 12d. . The spacing ring 16 is used to maintain the spacing between the second lens 22 and the third lens 23. The spacing ring 16 is provided inside the large-diameter portion 12c such that the outer peripheral surface faces the inner surface of the large-diameter portion 12c and the rear side contacts the third lens 23.

<Second lens 22>
The second lens 22 is a cylindrical lens formed of, for example, resin or glass, and has an outer diameter smaller than the diameter of the large diameter portion 12c and larger than the diameter of the small diameter portion 12d. The second lens 22 is provided inside the large-diameter portion 12c such that the outer peripheral surface faces the inner surface of the large-diameter portion 12c, and the rear side contacts the spacing ring 16. The second lens 22 has a second contact surface 22a in contact with the waterproof packing 11 on the front side. The second contact surface 22a has a substantially annular shape, and is in contact with the waterproof packing 11 over the entire circumference. The second lens 22 is a specific example of the “second optical member” in the present invention.

<First lens 21>
The first lens 21 is a cylindrical lens formed of, for example, resin or glass, and has an outer diameter smaller than the diameter of the large diameter portion 12c and larger than the diameter of the small diameter portion 12d. The first lens 21 is provided inside the large-diameter portion 12c such that the outer peripheral surface is opposed to the inner surface of the large-diameter portion 12c, and the front side is in contact with the retaining ring 13. The first lens 21 has a first contact surface 21 a facing the second contact surface 22 a of the second lens 22 and in contact with the waterproof packing 11 on the rear side. The first contact surface 21a has a substantially annular shape, and is in contact with the waterproof packing 11 over the entire circumference. The front end 21b of the first lens 21 is in contact with the holding ring 13 and has a substantially annular shape. The first lens 21 is a specific example of the “first optical member” in the present invention.

<Holding ring 13>
The holding ring 13 is directly fixed to the lens frame 12 and is located on the opposite side of the first lens 21 from the second lens 22. In the present embodiment, the holding ring 13 is formed of, for example, resin or metal, and is applied to the lens frame 12 along the optical axis direction. More specifically, the press ring 13 includes a cylindrical portion 13a and a tapered portion 13b. The tapered portion 13b has a diameter smaller than the outer diameter of the first lens 21 on the rear side, and has a shape that expands toward the front side around the optical axis. The cylindrical portion 13a is located on the rear side of the tapered portion 12e, and has a substantially cylindrical shape extending rearward with the optical axis as a central axis. The step 13c is formed between the tapered portion 13b and the cylindrical portion 13a, and has an annular flat surface facing the rear side. The holding ring 13 is fixed to the lens frame 12 at a position where the step 13c and the front end 12g of the lens frame 12 abut, for example. The fixing of the holding ring 13 to the lens frame 12 is realized by, for example, screwing the inner surface of the cylindrical portion 13 a and the outer surface of the lens frame 12. The press ring 13 is a specific example of the “third optical member” in the present invention.

<Fixing each lens>
The waterproof packing 11 urges each of the first contact surface 21a, the second contact surface 22a, and the third contact surface 12f of the cylindrical portion 12a when each lens is fixed. Specifically, the fourth lens 24, the third lens 23, the spacing ring 16, the second lens 22, the waterproof packing 11, and the first lens 21 are inserted into the cylindrical portion 12a of the lens frame 12 in this order from the front side. . The holding ring 13 is screwed into the lens frame 12 until the step 13c and the front end 12g of the lens frame 12 come into contact with each other. That is, the step 13c of the press ring 13 is applied to the end 12g of the lens frame 12 along the optical axis direction.

において In this state, the waterproof packing 11 is deformed by being sandwiched between the first lens 21 and the second lens 22, and comes into close contact with the first contact surface 21a, the second contact surface 22a, and the third contact surface 12f. That is, the waterproof packing 11 urges the first lens 21, the second lens 22, the spacing ring 16, the third lens 23, and the fourth lens 24 along the optical axis direction. Accordingly, the first lens 21, the second lens 22, the third lens 23, and the fourth lens 24 can be fixed by the restoring force of the waterproof packing 11, so that the lenses can be hardly distorted.

防水 The waterproof packing 11 urges the cylindrical portion 12a outward in the radial direction. As a result, the waterproof packing 11 comes into contact with the third contact surface 12f of the cylindrical portion 12a over the entire circumference, and also makes contact with the first contact surface 21a of the first lens 21 over the entire circumference. Can be prevented from entering.

端 Furthermore, the front end 21b of the first lens 21 abuts on the step 13c of the holding ring 13 while being urged to the front side along the optical axis direction by the waterproof packing 11. That is, the first lens 21 can be pressed in the optical axis direction against the holding ring 13 rigidly fixed to the lens frame 12, so that the position of the first lens 21 in the optical axis direction is the position of the step 13 c of the holding ring 13. It can be determined based on. Thereby, the first lens 21 can be arranged at the designed position on the lens frame 12.

The fourth lens 24 comes into contact with the step 12b of the lens frame 12 while being urged rearward along the optical axis direction by the waterproof packing 11. That is, since the fourth lens 24 can be pressed against the lens frame 12 in the optical axis direction, the optical axes of the fourth lens 24 and the second lens 22 and the third lens 23 that are in direct or indirect contact with the fourth lens 24 are provided. The position in the direction can be determined based on the position of the step 12b of the lens frame 12. Thereby, the second lens 22, the third lens 23, and the fourth lens 24 can be arranged at the designed positions in the lens frame 12.

The front end 12g of the lens frame 12 and the front end 21b of the first lens 21 are in contact with the same step 13c, that is, the end 12g and the end 21b are at the same position in the optical axis direction. Although the configuration in contact with the press ring 13 has been described, the end 12g and the end 21b may be in contact with the press ring 13 at different positions. Specifically, for example, when a step located on the front side and a step located on the rear side are provided instead of the step 13c, the end 21b abuts on the step located on the front side, and the end 12g However, it may be configured to abut on a step located on the rear side.

According to the lens barrel having the above-described configuration, for example, even when the first lens 21 expands or contracts due to a change in environmental temperature, the first contact surface 21a of the first lens 21 and the second contact The deformation or deformation of the waterproof packing 11 for urging the contact surface 22a can absorb the expansion or contraction of the first lens 21. As a result, the load applied to the lens can be reduced, so that distortion of the lens, cracking of the lens, cracking of the lens coating, and the like can be prevented. In addition, since the waterproof packing 11 further urges the cylindrical portion 12a, the space between the first lens 21 and the cylindrical portion 12a can be sealed. Can be prevented. That is, both the distortion countermeasure and the waterproof countermeasure can be realized by one waterproof packing 11. Therefore, with a simple configuration, the waterproofness can be enhanced while reducing the load on the lens due to thermal expansion.

In addition, in the lens barrel having the above-described configuration, the second lens 22 is located on the opposite side of the subject from the first lens 21, so that moisture can be prevented from entering the opposite side of the subject from the first lens 21.

In the lens barrel having the above-described configuration, the holding ring 13 is directly fixed to the lens frame 12 and is located on the opposite side of the second lens 22 with respect to the first lens 21, and thus is rigidly fixed to the lens frame 12. The first lens 21 can be pressed against the holding ring 13 in the optical axis direction. Accordingly, the position of the first lens 21 in the optical axis direction can be determined based on the press ring 13, so that the first lens 21 can be arranged at the designed position on the lens frame 12.

Further, in the lens barrel having the above-described configuration, since the press ring 13 is applied to the lens frame 12 along the optical axis direction, the position of the press ring 13 relative to the lens frame 12 in the optical axis direction and the press ring 13 Can be improved, and the dimensional accuracy of the cylindrical portion 12a of the lens frame 12 in which all the optical members are accommodated can be improved. Thereby, the accuracy of the position of each optical member in the optical axis direction in the cylindrical portion 12a of the lens frame 12 can be improved, so that a lens system having high resolution can be realized. In particular, it is possible to effectively improve the accuracy of the position in the optical axis direction of the first lens 21 that hits the holding ring 13.

Further, in the lens barrel having the above configuration, the first lens 21, the second lens 22, the third lens 23, and the fourth lens 24 are urged along the optical axis direction by the waterproof packing 11, so that two or more lenses are provided. The countermeasure against distortion of the lens can be achieved by one waterproof packing 11. Thereby, the number of parts can be reduced and the structure of the lens barrel 1 can be simplified, so that the manufacturing process of the lens barrel 1 can be prevented from becoming complicated and the manufacturing cost can be reduced.

Further, in the lens barrel of the present embodiment, since the first lens 21 is the lens located closest to the subject, it is possible to prevent water from entering the first lens 21, and thus the first lens 21 is wider than the lens barrel 12. Space can be waterproofed.

<2. Supplementary items>
The specific description of the embodiment of the present invention has been given above. The above description is merely an example of the embodiment, and the scope of the present invention is not limited to this embodiment, but is widely interpreted to a range that can be understood by those skilled in the art.

In the lens barrel of the present embodiment, the first lens 21 has been described as a specific example of the “first optical member”, but the optical member having a disc shape such as an optical filter is the “first optical member”. The configuration may be one specific example.

Further, in the lens barrel of the present embodiment, the configuration in which the second lens 22 and the pressing ring 13 are specific examples of the “second optical member” and the “third optical member” have been described. The second lens 22 may be configured as a specific example of a “second optical member” and a “third optical member”, respectively. In this case, the waterproof packing 11 is provided between the press ring 13 and the first lens 21. Further, the peripheral portion on the front side of the first lens 21 and the step 13c are specific examples of the “first contact surface” and the “second contact surface”, respectively. Then, the waterproof packing 11 urges the step 13c, the front edge of the first lens 21, and the cylindrical portion 12a.

Further, in the lens barrel of the present embodiment, a configuration in which each of the first lens 21, the second lens 22, the third lens 23, the fourth lens 24, and the press ring 13 is a specific example of the “optical member” will be described. However, the “optical member” may be, for example, an optical filter in addition to the lens or the press ring.

Also, in the lens barrel of the present embodiment, the configuration in which the first lens 21 is located closest to the subject is described. However, the first lens 21 may be configured in the second or subsequent position from the subject side. In this case, the waterproof packing 11 is provided on the rear side of the lens located at the second and subsequent positions from the subject side.

Further, in the lens barrel of the present embodiment, the configuration in which the holding ring 13 is directly fixed to the lens frame 12 has been described, but the holding ring 13 may be indirectly fixed to the lens frame 12. .

Also, in the lens barrel of the present embodiment, the configuration in which the cylindrical portion 12a accommodates four lenses has been described, but the cylindrical portion 12a may have a configuration in which one lens is accommodated.

レンズ Further, the lens barrel of the present embodiment is used in an imaging device for in-vehicle use or for monitoring. For example, when used in an in-vehicle imaging device, the effect of the present embodiment is particularly exhibited because it may be used in a high-temperature environment or the area around the first lens 21 may be exposed to rain when it rains. Will be.

The present invention is suitably used as an in-vehicle imaging device and a mobile imaging device.

DESCRIPTION OF SYMBOLS 1 ... Lens barrel 11 ... Waterproof packing 12 ... Lens frame 12a ... Cylindrical part 12b ... Step 12c ... Large diameter part 12d ... Small diameter part 12e ... Tapered part 12f ... Third contact surface 12g ... End part 13 ... Holding ring 13a ... Cylindrical part 13b ... taper part 13c ... step 16 ... interval ring 21 ... first lens 21a ... first contact surface 21b ... end 22 ... second lens 22a ... second contact surface 23 ... third lens 24 ... fourth lens 41 ... substrate 42 ... Image sensor

Claims

An annular waterproof seal having elasticity;
A plate-shaped first optical member having a first contact surface in contact with the waterproof seal;
A lens frame having a cylindrical portion that houses the first optical member;
A second optical member having a second contact surface in contact with the waterproof seal, and a second optical member located next to the first optical member;
The waterproof seal urges each of the first contact surface, the second contact surface, and the cylindrical portion,
Lens barrel.
The first optical member is a first lens,
The second optical member is a second lens located on the opposite side of the subject from the first optical member.
The lens barrel according to claim 1.
A third optical member fixed directly or indirectly to the lens frame and located on a side opposite to the second optical member with respect to the first optical member;
The first optical member is urged along the optical axis direction by the waterproof seal to come into contact with the third optical member,
The lens barrel according to claim 1.
The third optical member is applied to the lens frame along the optical axis direction,
The lens barrel according to claim 3.
Further comprising one or more optical members in addition to the first optical member,
The first optical member, and the one or more optical members are urged along the optical axis direction by the waterproof seal,
The lens barrel according to claim 1.
Further comprising one or more optical members in addition to the first optical member,
The first optical member is located closest to the subject,
The lens barrel according to claim 1.
A lens barrel according to any one of claims 1 to 6,
Imaging device.