Lens unit and imaging device

Abstract

To provide a lens unit that is easy to assemble while suppressing an increase in radial size.SOLUTION: A lens unit includes a holding member 5 that holds a lens 6d on an inner circumferential side, and a pressing member 15 that is disposed on an inner circumference of the holding member, contacts a contact surface 5e of the holding member from an optical axis direction, is fixed to the holding member by a fixing member AD, and thereby presses the lens against the holding member from the optical axis direction. The holding member has a first concave portion 5d that is concave toward an outside in a radial direction at at least one location in a circumferential direction. The pressing member has a second concave portion 15c that is concave toward an inside in the radial direction at at least one location in the circumferential direction. The fixing member is disposed in an area facing the first concave portion, the second concave portion, and the contact surface.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an imaging device such as an in-vehicle camera or a surveillance camera.

Background Art

[0002] In the case of an imaging device that is often used in an outdoor environment as described above, impact resistance performance against external forces is required.

[0003] Patent Document 1 discloses a lens module including a first lens provided on the object side and a fixing member that presses and holds the first lens from the object side to the front end of the lens barrel. The lens barrel is adhesively fixed to the fixing member. Patent Document 2 discloses a lens module including a lens provided on the object side and a fixing member that presses and fixes the lens from the object side to the front end of the lens barrel. An adhesive is filled between the contact portion of the fixing member that contacts the lens and the lens.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to improve impact resistance, it is effective to adhesively treat the lens to the fixing member. However, in the configuration of Patent Document 1, it is premised that the fixing member is fixed to the outer peripheral portion of the lens barrel, and the lens module increases in diameter by the size of the fixing member in the radial direction. Further, in the configuration of Patent Document 2, since an adhesive is applied between the fixing member and the lens, it is necessary to assemble so that the adhesive does not spread into the optical effective area of the lens, and the assembly is not easy.

[0006] The present invention provides a lens unit that is easy to assemble while suppressing radial size increase, and an imaging device equipped therewith. [Means for solving the problem]

[0007] One aspect of the present invention is a lens unit that holds the lens on the inner circumference side. It is composed of a first retaining member to which the lens is fixed, and a second retaining member that holds the first retaining member on its inner circumference. A retaining member and a component arranged on the inner circumference of the retaining member, 1 The contact surface of the holding member contacts from the optical axis direction. First retaining member and second To the retaining member glue It has a pressing member that, when fixed by this, presses the lens against the holding member from the optical axis direction. 2nd The retaining member has a first recess that is recessed radially outward at at least one location in the circumferential direction. The pressing member has a second recess that is recessed radially inward at at least one location in the circumferential direction. In the region facing the contact surface with the first recess and the second recess, glue The present invention is characterized by the arrangement of the above-mentioned lens unit and an image sensor that captures an image of a subject through the lens. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a lens unit that is easy to assemble while suppressing an increase in radial size, and an imaging device equipped therewith. [Brief explanation of the drawing]

[0009] [Figure 1] Rear view and cross-sectional view of the lens unit of Example 1. [Figure 2] Cross-sectional view of the imaging unit of Example 1. [Figure 3] An exploded perspective view of the imaging unit of Example 1, as seen from the object side. [Figure 4] An exploded perspective view of the imaging unit of Example 1, as seen from the image side. [Figure 5] Perspective view of the camera in Example 1. [Figure 6] Rear view and cross-sectional view of the lens unit of Example 2. [Figure 7] Cross-sectional view of the imaging unit in Example 2. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Examples]

[0011] The imaging device of Example 1 is particularly suitable for in-vehicle cameras, surveillance cameras, and the like used in outdoor environments. However, the imaging devices of the embodiments of the present invention also include those used indoors.

[0012] Figure 5 shows the external appearance of the camera 100 of this embodiment. The camera 100 has an imaging unit 1 as an imaging device and an exterior member 2 that holds it. The imaging surface side portion of the imaging unit 1 is housed within the exterior member 2 and fixed to the exterior member 2 by screws (not shown), while the object side portion of the imaging unit 1 is exposed through an opening provided on the front surface of the exterior member 2. The gap between the opening of the exterior member 2 and the outer periphery of the imaging unit 1 is sealed by a sealing member (not shown), preventing water and dust from entering through the gap.

[0013] A cover 3 is fixed to the back of the exterior component 2 with screws (not shown). The exterior component 2 and the cover 3 are sandwiched by a sealing member (not shown), which prevents water and dust from entering through the gap between the exterior component 2 and the cover 3. The cover 3 is also provided with an external interface (not shown). By connecting a cable to this external interface, the video signal generated by imaging by the imaging unit 1 can be output externally. The external interface may also have a wireless communication function for video signals.

[0014] FIG. 2 shows the internal structure of the imaging unit 1. FIG. 3 shows the imaging unit 1 disassembled as viewed from the object side (subject side). FIG. 4 shows the imaging unit 1 disassembled as viewed from the image plane side (hereinafter referred to as the sensor side). The dashed-dotted line shown in FIG. 2 indicates the optical axis. In the following description, the direction in which the optical axis extends is referred to as the optical axis direction, the direction orthogonal to the optical axis is referred to as the radial direction, and the direction around the optical axis is referred to as the circumferential direction.

[0015] The housing 4 has an opening 4a on the object side, an opening 4b on the sensor side, and an internal thread portion 4c provided on the inner peripheral portion, and holds the lens unit 30 on its inner peripheral side. The lens unit 30 is composed of a lens frame 5 and lenses 6a, 6b, 6c, and 6d. The lens unit 30 is inserted into the opening 4a, and the outer thread portion 5a provided on the outer peripheral portion of the lens frame 5 is screwed into the internal thread portion 4c provided on the inner peripheral portion of the housing 4, so that the lens unit 30 is held by the housing 4.

[0016] From the viewpoint of weather resistance in outdoor use, it is desirable that the housing 4 and the lens frame 5 be made of metal. A circumferential groove portion 5b is formed in a portion on the object side of the outer thread portion 5a on the outer peripheral portion of the lens frame 5, and an elastic body (second sealing member) 7 such as an O-ring is fitted into the circumferential groove portion 5b. The elastic body 7 seals between the outer peripheral portion of the lens frame 5 and the inner peripheral portion of the housing 4 to prevent the intrusion of water and dust from the gap therebetween.

[0017] The sensor unit 8 has an image pickup element 8a such as a CMOS sensor. The sensor unit 8 is disposed inside the opening 4b of the housing 4 and is fixed to a receiving portion provided in the opening 4b with a screw 9. Thereby, the sensor unit 8 is held by the housing 4 together with the lens unit 30. Since the outer thread portion 5a of the lens unit 30 is screwed into the internal thread portion 4c of the housing 4 as described above, the position adjustment in the optical axis direction with respect to the sensor unit 8 can be performed by rotating the lens unit 30 around the optical axis with respect to the housing 4.

[0018] In the lens unit 30, the lens frame 5, acting as a holding member, holds lenses 6a to 6d on its inner circumference. Openings are formed at both the object-side end and the sensor-side end of the lens frame 5. Lens 6b, spacer 11, elastic body 10 such as an O-ring, and lens 6a are inserted into the inner circumference of the lens frame 5 in this order, starting from the opening on the object side. The front retaining ring 12 is fixed to the lens frame 5 while contacting the lens 6a closest to the object by screwing an external threaded portion (not shown) on its outer circumference into an internal threaded portion (not shown) on the inner circumference of the lens frame 5. As a result, the elastic body 10 is sandwiched between lens 6a and the lens frame 5, sealing the gap between lens 6a and the lens frame 5 and preventing water and dust from entering through the gap.

[0019] Furthermore, the lens 6c is inserted into the inner circumference of the lens frame 5 from the opening on the sensor side and fixed to the lens frame 5 with adhesive as a fixing member. In addition, the lens 6d, fixing plate 13, and elastic body (elastic member) 14 such as an O-ring are inserted into the inner circumference of the lens frame 5 in this order from the opening on the sensor side. The rear retaining ring 15, which acts as a retaining member, is fixed to the lens frame 5 while in contact with the elastic body 14 by screwing the outer circumference thread 15a provided on its outer circumference into the inner circumference thread portion 5c provided on the inner circumference of the lens frame 5.

[0020] The rear retaining ring 15 is screwed into the lens frame 5 until its contact surface 15b contacts the contact surface 5e of the lens frame 5. This sandwiches the elastic body 14 between the rear retaining ring 15 and the fixing plate 13, and the lens 6d closest to the sensor is biased toward the object by the elastic force of the elastic body 14, while the rear retaining ring 15 holds the lens frame 5. In this configuration, the lens 6d is pressed against the lens frame 5 with less force than if it were directly pressed toward the object by the rear retaining ring 15. Therefore, deformation of the lens surface of the lens 6d is suppressed, preventing a decrease in optical performance. However, if deformation of the lens surface of the lens 6d is suppressed, the rear retaining ring 15 may be directly contacted with the lens 6d to hold the lens 6d with the lens frame 5.

[0021] Figure 1(A) shows the lens unit 30 as seen from the sensor side, and Figure 1(B) shows the AA cross-section in Figure 1(A). Figure 1(C) shows an enlarged view of region B in Figure 1(B).

[0022] A notch 5d is formed as a first recess in one location on the circumferential side of the inner threaded portion 5c of the lens frame 5, recessed radially outward. The circumferential surface within the notch 5d is an arcuate surface (part of a cylindrical surface) extending in the direction of the optical axis. On the other hand, a notch 15c is formed as a second recess in one location on the circumferential side of the outer threaded portion 15a of the rear retaining ring 15, recessed radially inward. The part of the circumferential surface within the notch 15c that is on the object side is an arcuate surface extending in the direction of the optical axis, while the part that is on the sensor side is an inclined surface (frustum of a cone) that is inclined so that it approaches the optical axis as it approaches the optical axis on the sensor side.

[0023] When the retaining ring 15 is assembled to the lens frame 5 by screwing, the notches 15c and 5d are positioned facing each other radially, that is, in the same phase circumferentially. In addition, the contact surface 5e is exposed between the notches 15c and 5d, facing the sensor side. As a result, a space (region) V1 is formed that opens toward the sensor side, facing the notches 15c, 5d, and 5e. Adhesive AD is placed within this space V1. This causes the retaining ring 15 (notch 15c) to be adhesively fixed to the lens frame 5 (notch 5d and contact surface 5e).

[0024] Furthermore, by providing a slope in the notch 15c, the radial width of the sensor-side opening in space V1 is increased, improving workability when filling the area V1 with adhesive. It is sufficient that at least one of the notches 15c and 5d is formed such that the radial width of space V1 widens toward the sensor side (the side opposite to the contact surface 5e in the optical axis direction).

[0025] Although this embodiment describes fixing with an adhesive, fixing may also be done by filling with an elastic material such as a sealant, without using an adhesive.

[0026] Furthermore, the length of the circumferential notch may be such that one of the notches, 5d or 15c, is longer than the other. This ensures that even if the phases of the notches 5d and 15c are slightly misaligned due to manufacturing variations of the parts, sufficient circumferential length can be secured between the notches 15c and 5d to form space V1, resulting in good adhesive strength. In addition, the notches 15c and 5d may be provided at multiple locations in the circumferential direction of the rear retaining ring 15 and the lens frame 5, respectively.

[0027] In this embodiment, the diameter of the lens unit 30 can be reduced by screwing the rear retaining ring 15 into the lens frame 5, while also forming an adhesive reservoir (space V1) for bonding the rear retaining ring 15 to the lens frame 5. As a result, the adhesive AD used to bond the rear retaining ring 15 can be bonded to the lens frame 5 without the adhesive AD wrapping around to the lens surface of the lens 6d. In other words, it is possible to provide a lens unit with good assembly (adhesion workability) while suppressing an increase in the radial size of the lens unit 30.

[0028] In this embodiment, the holding structure of the rear retaining ring 15 that holds down the lens 6d closest to the sensor has been described, but a similar holding structure may be applied to the front retaining ring 12 that holds down the lens 6a closest to the object. [Examples]

[0029] Next, we will describe Example 2. Figure 7 shows the internal structure of the imaging unit 1000 in Example 2. In this example, components common to Example 1 are denoted by the same reference numerals as in Example 1 and are not described. In this example, we will mainly describe the lens unit 300, which has a different configuration from the lens unit 30 in Example 1.

[0030] The lens unit 300 consists of a lens frame 50, which serves as a first retaining member, to which lenses 6a to 6d are directly fixed and held, and an outer frame 16, which serves as a second retaining member, to which the lens frame 50 is held on the inner circumference. Openings are provided at the object-side end and the sensor-side end of both the lens frame 50 and the outer frame 16.

[0031] It is preferable that the lens frame 50 is made of resin and the outer frame 16 is made of metal. Because the lens frame 50 is made of resin, the lenses 6a to 6d can be press-fitted into the inner circumference of the lens frame 50 for retention. Therefore, it is possible to hold the lenses with higher positional accuracy than in Example 1, where the lens frame 5 is made of metal. Furthermore, by holding the lens frame 50 with the metal outer frame 16, the lens frame 50 is prevented from being directly exposed to outdoor environments such as sunlight, thereby improving the weather resistance of the lens unit 300.

[0032] The lens unit 300 is inserted into the opening 4a of the housing 4, and is held in place by the housing 4 when the outer peripheral threaded portion 16e provided on the outer circumference of the outer frame 16 is screwed into the inner peripheral threaded portion 4c of the housing 4.

[0033] The lens frame 50 holds lenses 6a to 6d on its inner circumference. Lenses 6b and 6a are inserted into the inner circumference of the lens frame 50 in that order from the opening on the object side. Lenses 6a and 6b are fixed and held in place by heat crimping to the lens frame 50. An elastic body (first sealing member) 70, such as an O-ring, is placed in a stepped portion provided on the object side of the outer circumference of lens 6a.

[0034] Furthermore, the lens 6c is inserted into the inner circumference of the lens frame 50 from the opening on the sensor side. The lens 6c is fixed and held in place by heat crimping to the lens frame 50. An outer circumference threaded portion 50a is formed on the outer circumference of the lens frame 50. The lens frame 50 is held in place by the outer frame 16 by screwing the outer circumference threaded portion 50a into the inner circumference threaded portion 16a which is received on the inner circumference of the outer frame 16.

[0035] At this time, the elastic body 70 is sandwiched between the flange portion 16b, which is formed as a protruding part that projects radially inward at the front end of the outer frame 16 (closest to the object than the lens 6a on the object side), and the lens 6a held by the lens frame 50. As a result, the gap between the flange portion 16b and the lens 6a is sealed, preventing water and dust from entering through the gap.

[0036] Furthermore, the lens 6d, fixing plate 13, elastic body 14, and rear retaining ring 15 as a retaining member are inserted in this order from the sensor-side opening into the inner circumference of the outer frame 16 that holds the lens frame 50. The rear retaining ring 15 is held by the outer frame 16 while in contact with the elastic body 14, as its outer circumference screw 15a is screwed into the inner circumference screw portion 16c provided on the inner circumference of the outer frame 16.

[0037] The rear retaining ring 15 is screwed into the outer frame 16 until its contact surface 15b contacts the contact surface 50e of the lens frame 50. As a result, similar to Embodiment 1, the elastic body 14 is sandwiched between the rear retaining ring 15 and the fixing plate 13, and the rear retaining ring 15 is held by the outer frame 16 with the lens 6d closest to the sensor biased toward the object by the elastic force of the elastic body 14. In this configuration, the lens 6d is pressed against the lens frame 50 with a lower force than if it were directly pressed toward the object by the rear retaining ring 15. Therefore, deformation of the lens surface of the lens 6d is suppressed, preventing a decrease in optical performance. However, if deformation of the lens surface of the lens 6d is suppressed, the rear retaining ring 15 may be brought into direct contact with the lens 6d to hold the lens 6d in place by the lens frame 50.

[0038] Figure 6(A) shows the lens unit 300 as seen from the sensor side, and Figure 6(B) shows the CC cross section in Figure 6(A). Figure 6(C) shows an enlarged view of region D in Figure 6(B).

[0039] A notch 16d is formed as a first recess, recessed radially outward, at one location in the circumferential direction of the inner circumferential thread portion 16c of the outer frame 16. The circumferential surface within the notch 16d is an arcuate surface (part of a cylindrical surface) extending in the direction of the optical axis. Also, similar to Embodiment 1, a notch 15c is formed as a second recess, recessed radially inward, at one location in the circumferential direction of the outer circumferential thread portion 15a of the rear retaining ring 15. The circumferential surface within the notch 15c is an arcuate surface extending radially outward on the object side and a sloped surface on the sensor side.

[0040] When the retaining ring 15 is assembled to the outer frame 16 by screwing, the notches 15c and 16d are positioned so that they face each other radially (and are in phase circumferentially). Also, the contact surface 50e of the lens frame 50 is exposed between the notches 15c and 16d, facing the sensor side. As a result, a space (region) V2 is formed that opens toward the sensor side, facing the notches 15c, 16d, and the contact surface 50e. Adhesive AD is placed within this space V2. This causes the retaining ring 15 (notch 15c) to be adhesively fixed to the outer frame 16 (notch 16d) and the lens frame 50 (contact surface 50e).

[0041] In this embodiment as well, by providing a slope in the notch 15c, the radial width of the sensor-side opening in space V2 is increased, improving workability when filling the area V2 with adhesive. At least one of the notches 15c and 16d should be formed such that the radial width of space V2 widens toward the sensor side (the side opposite to the contact surface 50e in the optical axis direction).

[0042] Furthermore, the length of the circumferential notch may be such that one of the notches, 16d or 15c, is longer than the other. This ensures that even if the phases of the notches 16d and 15c are slightly misaligned due to manufacturing variations of the parts, sufficient circumferential length can be secured between the notches 16d and 15c to form space V2, resulting in good adhesive strength. In addition, the notches 15c and 16d may be provided at multiple locations in the circumferential direction of the rear retaining ring 15 and the outer frame 16, respectively. In this embodiment, the diameter of the lens unit 300 can be reduced by screwing the rear retaining ring 15 into the outer frame 16, while simultaneously forming an adhesive reservoir (space V2) for bonding the rear retaining ring 15 to the outer frame 16 and the lens frame 50. This prevents the adhesive for bonding the rear retaining ring 15 from flowing onto the lens surface of the lens 6d, allowing the rear retaining ring 15 to be bonded to the outer frame 16 and the lens frame 50. In other words, it is possible to provide a lens unit that has good assembly properties (adhesion workability) while suppressing an increase in the radial size of the lens unit 300.

[0043] In Examples 1 and 2, a retaining configuration was described in which the rear retaining ring 15 is screwed onto the lens frame 5 or outer frame 16, but other retaining configurations such as bayonet couplings may also be used.

[0044] The above embodiments include the following configuration. (Composition 1) A retaining member that holds the lens on the inner circumference, The holding member is positioned on the inner circumference of the holding member and contacts the contact surface of the holding member from the optical axis direction, and is fixed to the holding member by a fixing member, thereby pressing the lens against the holding member from the optical axis direction. The retaining member has a first recess that is recessed radially outward at at least one location in the circumferential direction, The retaining member has a second recess that is recessed radially inward at at least one location in the circumferential direction, A lens unit characterized in that the fixing member is arranged in the region facing the first recess, the second recess, and the contact surface. (Configuration 2) The lens unit according to configuration 1, characterized in that the fixing member is an adhesive. (Composition 3) The retaining member has an internal threaded portion, The aforementioned retaining member has an outer threaded portion, The lens unit according to configuration 2, characterized in that the retaining member is assembled to the holding member by screwing the outer circumferential thread portion into the inner circumferential thread portion until it contacts the contact surface, and is fixed to the first holding member by the adhesive. (Composition 4) The retaining member is composed of a first retaining member to which the lens is fixed, and a second retaining member that holds the first retaining member on its inner circumference. The pressing member abuts against the contact surface provided on the first holding member and is fixed to the first and second holding members by the adhesive. The lens unit according to configuration 2, characterized in that the first recess is provided in the second retaining member. (Composition 5) The second retaining member has an internal threaded portion, The aforementioned retaining member has an outer threaded portion, The lens unit according to configuration 4, characterized in that the retaining member is assembled to the second retaining member by screwing the outer circumferential thread portion into the inner circumferential thread portion until it contacts the contact surface, and is fixed to the first and second retaining members by the adhesive. (Composition 6) The second retaining member has a projection that protrudes radially inward on the object side, compared to the lens closest to the object that is held by the first retaining member. The lens unit according to configuration 4 or 5, characterized in that a first sealing member is disposed between the protruding portion and the lens closest to the object. (Composition 7) The first recess is provided at least one location in the circumferential direction of the internal thread portion, The lens unit according to configuration 3 or 5, characterized in that the second recess is provided at least one location in the circumferential direction of the outer peripheral thread portion. (Composition 8) The lens unit according to any one of configurations 1 to 7, characterized in that at least one of the first and second recesses is formed such that the radial width of the region widens toward the opposite side of the optical axis from the contact surface. (Composition 9) A lens unit according to any one of configurations 1 to 8, characterized in that the circumferential length of at least one of the first and second recesses is longer than the circumferential length of the other recess. (Composition 10) An elastic member is placed between the pressing member and the lens. The lens unit according to any one of configurations 1 to 9, characterized in that the pressing member presses the lens against the holding member via the elastic member. (Composition 11) A lens unit described in any one of configurations 1 to 10, An imaging device characterized by having an image sensor that captures an image of a subject through the aforementioned lens. (Composition 12) The housing has the lens unit and the image sensor held on the inner circumference side, The imaging apparatus according to configuration 11, characterized in that the lens unit is held by the housing so as to be able to adjust its position in the optical axis direction relative to the image sensor. (Composition 13) The imaging device according to configuration 12, characterized in that a second sealing member is disposed between the inner circumference of the housing and the outer circumference of the retaining member.

[0045] The embodiments described above are merely representative examples, and various modifications and changes can be made to each embodiment when implementing the present invention. [Explanation of Symbols]

[0046] 30,300 lens units 5.50 lens frame 5d Notch 6a~6d lenses 8 Sensor Unit 14 cabinets 15. Rear retaining ring 15c Notch 16 Outer frame 16d Notch

Claims

1. A retaining member comprising a first retaining member that holds the lens on its inner circumference and to which the lens is fixed, and a second retaining member that holds the first retaining member on its inner circumference, The holding member is positioned on the inner circumference of the holding member and is fixed to the first and second holding members by adhesive, in contact with the contact surface of the first holding member from the optical axis direction, thereby pressing the lens against the holding member from the optical axis direction. The second retaining member has a first recess that is recessed radially outward at at least one location in the circumferential direction, The retaining member has a second recess that is recessed radially inward at at least one location in the circumferential direction, A lens unit characterized in that the adhesive is disposed in the region facing the first recess, the second recess, and the contact surface.

2. The retaining member has an internal threaded portion, The aforementioned retaining member has an outer threaded portion, The lens unit according to claim 1, characterized in that the retaining member is assembled to the holding member by screwing the outer circumferential thread portion into the inner circumferential thread portion until it contacts the contact surface, and is fixed to the first holding member by the adhesive.

3. The second retaining member has an internal threaded portion, The aforementioned retaining member has an outer threaded portion, The lens unit according to claim 1, characterized in that the retaining member is assembled to the second retaining member by screwing the outer circumferential thread portion into the inner circumferential thread portion until it contacts the contact surface, and is fixed to the first and second retaining members by the adhesive.

4. The second holding member has a projection that protrudes radially inward on the object side, compared to the lens closest to the object held by the first holding member. The lens unit according to claim 1, characterized in that a first sealing member is disposed between the protruding portion and the lens closest to the object.

5. The first recess is provided at least one location in the circumferential direction of the internal thread portion, The lens unit according to claim 2 or 3, characterized in that the second recess is provided at least one location in the circumferential direction on the outer threaded portion.

6. The lens unit according to claim 1, characterized in that at least one of the first and second recesses is formed such that the radial width of the region widens toward the side opposite to the contact surface in the optical axis direction.

7. The lens unit according to claim 1, characterized in that the circumferential length of at least one of the first and second recesses is longer than the circumferential length of the other recess.

8. An elastic member is placed between the pressing member and the lens. The lens unit according to claim 1, characterized in that the pressing member presses the lens against the holding member via the elastic member.

9. The lens unit according to claim 1, An imaging device characterized by having an image sensor that captures an image of a subject through the aforementioned lens.

10. The housing has the lens unit and the image sensor held on the inner circumference side, The imaging apparatus according to claim 9, characterized in that the lens unit is held by the housing so as to be able to adjust its position in the optical axis direction with respect to the image sensor.

11. The imaging device according to claim 10, characterized in that a second sealing member is disposed between the inner circumference of the housing and the outer circumference of the retaining member.

Images