Lens barrel, and imaging apparatus

Abstract

To provide a lens barrel advantageous in terms of a reduction of total length.SOLUTION: A lens barrel has: a moving group that has a first optical element and a second optical element arranged along an optical axis; a third optical element that is adjacent to the second optical element in an optical axis direction, and is fixed to a first fixation frame; a moving frame that holds the first optical element, and is movable in the optical axis direction; and an adjustment frame that holds the second optical element so that it can be adjusted relative to the position of the first optical element, and is fixed to the moving frame after the position is adjusted. A first stopper part is formed on the adjustment frame, and a second stopper part contactable with the first stopper part is formed on the first fixation frame.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an optical device including a movable lens, and particularly to a lens barrel that performs optical adjustment within the movable lens and an imaging device including the lens barrel.

Background Art

[0002] Some lens barrels move a plurality of lens units, such as a zoom group and a focus group, in the optical axis direction with independent actuators respectively. In such a lens barrel, zoom tracking control is performed to control the position of the focus lens according to the subject distance and the position of the zoom lens during zooming. Thereby, defocus due to zooming is suppressed and the focused state is maintained. When moving a plurality of such lens units in the optical axis direction with independent actuators respectively, the relative positions of the lens units deviate from the design values due to manufacturing errors. Therefore, usually, zoom tracking adjustment is performed to suppress the influence of manufacturing errors for each individual.

[0003] When performing zoom tracking adjustment, sometimes a reference position setting for detecting a reference position is first performed. As a method thereof, Patent Document 1 describes a method of first moving a moving ring to a mechanical end as a reference and then moving it by a design stroke. Here, the mechanical end is a mechanical stopper provided on the moving ring and a fixed frame that holds the moving ring or the like, and restricts the movement of the moving ring in the optical axis direction. Since the mechanical stopper needs to be provided so that the optical element held by the moving ring and the adjacent optical element do not interfere when the moving ring moves to the mechanical end, the interval is set by estimating various manufacturing errors.

[0004] In addition, since the mechanical stopper is used for reference position setting of zoom tracking adjustment, high position accuracy is required. Therefore, for example, Patent Document 2 describes a method of arranging the mechanical stopper near the sleeve of the moving ring in order to reduce the deviation in the optical axis direction due to the play effect of the guide bar fitting portion when moving to the mechanical end.

Prior Art Documents

Patent Document

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In a plurality of lenses held by a moving ring, when it is necessary to adjust the interval and eccentricity within the plurality of lenses, in setting the interval between the adjusting lens and the adjacent optical element, it is necessary to estimate not only the manufacturing error but also the adjustment amount, which has led to an increase in the overall length of the lens.

[0007] Therefore, an exemplary object of the present invention is to provide a lens barrel that is advantageous in terms of miniaturization of the overall length.

Means for Solving the Problems

[0008] To solve the above problems, the present invention includes a moving group having a first optical element and a second optical element arranged along the optical axis, a third optical element adjacent to the second optical element in the optical axis direction and fixed to a first fixed frame, a moving frame that holds the first optical element and is movable in the optical axis direction, and an adjustment frame that holds the second optical element adjustably with respect to the position of the first optical element and is fixed to the moving frame after the position adjustment. The adjustment frame is formed with a first stopper portion, and the first fixed frame is formed with a second stopper portion that can abut against the first stopper portion.

Effects of the Invention

[0009] According to the present invention, it is possible to provide a lens barrel that is advantageous in terms of miniaturization of the overall length.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0011] Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings. In addition, throughout the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant descriptions are omitted.

[0012] <Embodiment> FIG. 1 is a cross-sectional view of the lens barrel 100 of the present embodiment. The lens barrel 100 includes a variable magnification optical system (zoom lens system) constituted by five lens units (lens groups) L1 to L5 each including at least one optical element.

[0013] The 1-group lens unit L1 is stationary in the optical axis direction. The 2-group lens unit L2, the 3-group lens unit L3 (the moving group), and the 5-group lens unit L5 perform zooming by moving in the optical axis direction. The 3-group lens unit L3 includes a 3a-group lens unit L3a (the second optical element), a 3b-group lens unit L3b (the first optical element), and a 3c-group lens unit L3c. The 3a-group lens unit L3a corrects optical aberrations by adjusting the interval and decentration with respect to the 3b-group lens unit L3b. The 3c-group lens unit L3c is an anti-vibration lens unit that shifts in a direction orthogonal to the optical axis of the imaging optical system to reduce image blur.

[0014] The 4-group lens unit L4 corrects the image plane fluctuation associated with zooming by moving in the optical axis direction. Also, the 4-group lens unit L4 serves as a focus lens group that performs focus adjustment by moving in the optical axis direction.

[0015] The 1-group lens holding frame 1 holds the 1-group lens unit L1. The 2-group moving frame 2 holds the 2-group lens unit L2. The adjustment frame 6 holds the 3a-group lens unit L3a. The 3-group moving frame 3 holds the 3b-group lens unit L3b and further holds the adjustment frame 6 in a manner that allows adjustment of the interval and parallel decentration with respect to the 3b-group lens unit L3b. The anti-vibration unit 30 holds the 3c-group lens unit L3c. The 4-group moving frame 4 holds the 4-group lens unit L4. The 5-group moving frame 5 holds the 5-group lens unit L5.

[0016] The front fixed barrel 8 has its front end coupled to the 1-group lens holding frame 1, fixing the 1-group lens unit L1 at a predetermined position. Also, the rear end of the front fixed barrel 8 is coupled to the rear fixed barrel 10.

[0017] The central fixed lens barrel 9 (the first fixed frame) holds the light quantity adjustment unit 7 (the third optical element), and its rear end is coupled to the rear fixed lens barrel 10 (the second fixed frame) described later. The light quantity adjustment unit 7 is disposed at a position adjacent to the 3a-group lens unit L3a in the optical axis direction. That is, the light quantity adjustment unit 7 is disposed between the central fixed lens barrel 9 and the 3a-group lens unit L3a along the optical axis and is fixed to the central fixed lens barrel 9. The light quantity adjustment unit 7 adjusts the light quantity by moving the diaphragm blades in a plane orthogonal to the optical axis by a drive unit (not shown) to change the aperture diameter of the optical system.

[0018] The two-group moving frame 2 is supported so as to be movable in the optical axis direction by two-group guide bars 11 whose both ends are held by the front fixed lens barrel 8 and the rear fixed lens barrel 10.

[0019] The three-group moving frame 3 is integrated with the adjustment frame 6 and the vibration-proof unit 30, and is supported so as to be movable in the optical axis direction by three-group guide bars 12 whose both ends are held by the central fixed lens barrel 9 and the rear fixed lens barrel 10. That is, the rear fixed lens barrel 10 holds the three-group moving frame 3 and the adjustment frame 6 fixed to the three-group moving frame 3 together with the central fixed lens barrel 9 by the three-group guide bars 12, thereby holding the three-group lens unit L3 movably in the optical axis direction.

[0020] The four-group moving frame 4 is supported so as to be movable in the optical axis direction by four-group guide bars 13 whose both ends are held by the central fixed lens barrel 9 and the rear fixed lens barrel 10.

[0021] The five-group moving frame 5 is supported so as to be movable in the optical axis direction by five-group guide bars 14 whose both ends are held by the central fixed lens barrel 9 and the rear fixed lens barrel 10.

[0022] The three-group moving frame 3 is moved in the optical axis direction by an actuator such as a stepping motor 15. The stepping motor 15 has a lead screw coaxial with the rotating rotor. A rack 16 attached to the three-group moving frame 3 meshes with the lead screw and is driven in the optical axis direction by the rotation of the rotor. The two-group moving frame 2 and the five-group moving frame 5 are similarly moved in the optical axis direction by an actuator such as an independent stepping motor (not shown) and a rack respectively. The four-group moving frame 4 is moved in the optical axis direction by a voice coil motor or the like (not shown).

[0023] Each moving group of the two-group moving frame 2 to the five-group moving frame 5 holds a position detection unit. When a zoom operation is input from the user, the two-group moving frame 2 is moved in the optical axis direction by a stepping motor. The three-group moving frame 3 and the five-group moving frame 5 are moved and zoomed along a movement trajectory (zoom tracking data) determined for each position of the two-group moving frame 2.

[0024] The imaging device 40 is an imaging unit that photoelectrically converts a subject image formed by the first-group lens unit L1 to the fifth-group lens unit L5. That is, the imaging device 40 receives the image formed by the first-group lens unit L1 to the fifth-group lens unit L5. The imaging device 40 is adhesively fixed to the mounting plate 41.

[0025] With reference to FIGS. 2 and 3, the three-group lens unit L3 of the present embodiment and the structure of its peripheral portion will be described. FIG. 2 is an exploded perspective view including the three-group lens unit L3 of the present embodiment. FIG. 3 is a front view including the three-group lens unit L3 of the present embodiment.

[0026] The three-group lens unit L3 includes a three-a group lens unit L3a, a three-b group lens unit L3b, and a three-c group lens unit L3c. The three-b group lens unit L3b is held by the three-group moving frame 3. A sleeve 3c is formed on the three-group moving frame 3. A hole is formed in the sleeve 3c, and a three-group guide bar 12 fits into the hole. A U-groove 3d for preventing rotation that fits with the guide bar 18 is formed on the opposite side of the sleeve 3c across the three-b group lens unit L3b.

[0027] The group 3a lens unit L3a is an optical adjustment lens and is held by the adjustment frame 6. The adjustment frame 6 corrects the degradation of the optical function caused by manufacturing errors by adjusting the position of the group 3a lens unit L3a with respect to the group 3b lens unit L3b in the optical axis direction and the direction orthogonal to the optical axis (parallel eccentricity).

[0028] Hereinafter, the method will be described in detail. The interval adjustment washer 17 is disposed between the adjustment frame 6 and the group 3 moving frame 3. A plurality of thicknesses are set for the interval adjustment washer 17, and the interval between the group 3a lens unit L3a and the group 3b lens unit L3b is changed by changing the incorporated thickness.

[0029] An adjustment frame holding portion 3a for accommodating the interval adjustment washer 17 and the adjustment frame 6 is formed in the group 3 moving frame 3. The inner diameter of the adjustment frame holding portion 3a is set larger than the outer diameter of the adjustment frame 6. Therefore, the adjustment frame 6 can be eccentrically adjusted with respect to the group 3 moving frame 3.

[0030] Six adhesive grooves 3b are formed in the adjustment frame holding portion 3a. After the adjustment in the direction orthogonal to the optical axis where the optical performance is good is completed, an adhesive 19 is applied to the adhesive groove 3b, and the adjustment frame 6 is adhesively fixed to the group 3 moving frame 3.

[0031] The group 3c lens unit L3c is held by the vibration-proof unit 30. The vibration-proof unit 30 is held by the eccentric roller 20 and the screw 21 so as to be tilt-adjustable with respect to the group 3 moving frame 3.

[0032] Next, the mechanical stopper of the present embodiment will be described. Three arm portions 6a extending in the outer peripheral direction, that is, the direction orthogonal to the optical axis, are formed in the adjustment frame 6. At the tip of the arm portion 6a, one main stopper 6b (first stopper portion) protruding in the optical axis direction (toward the subject side) and two sub-stoppers 6c (first stopper portion) are formed.

[0033] When the three-group moving frame 3 moves to the mechanical end, the wrist part 6a extends to the outer peripheral side of the light quantity adjustment unit 7, which is an optical element adjacent to the main stopper 6b and the sub-stopper 6c, to avoid interference with the light quantity adjustment unit 7. That is, the main stopper 6b and the sub-stopper 6c are arranged on the outer peripheral side of the light quantity adjustment unit 7.

[0034] At the positions of the main stopper 6b and the sub-stopper 6c of the middle fixed lens barrel 9, a stopper 9a (a second stopper part, shown in FIG. 4 etc.) is formed. The height of the main stopper 6b is set higher than that of the sub-stopper 6c so that the main stopper 6b always hits first. Since the main stopper 6b is used for setting the reference position during zoom tracking adjustment, high accuracy is required. In this embodiment, when the main stopper 6b and the stopper 9a are in contact, the 3a-group lens unit L3a and the light quantity adjustment unit 7 do not contact. Also, when the main stopper 6b and the stopper 9a are in contact, the three-group moving frame 3 and the middle fixed lens barrel 9 do not contact.

[0035] There is a fitting play between the sleeve 3c and the three-group guide bar 12, and due to the fitting play, the three-group moving frame 3 tilts. At that time, the sub-stopper 6c, which is farther from the optical axis direction from the sleeve 3c, has a larger amount of displacement in the optical axis direction. Therefore, by arranging the main stopper 6b near the sleeve 3c, where the amount of displacement in the optical axis direction is small, the amount of displacement in the optical axis direction due to the tilting component of the three-group moving frame 3 can be reduced during reference position setting.

[0036] The sub-stopper 6c mainly acts as a shock absorber when the three-group moving frame 3 moves to the mechanical end due to an external shock such as a fall.

[0037] Next, the miniaturization effect when a stopper is provided on the adjustment frame 6 of the present embodiment will be described with reference to FIGS. 4 and 6. FIG. 4 is a cross-sectional view at the mechanical end position of the shape in which the stopper of the present embodiment is provided on the adjustment frame 6. Here, the mechanical end position refers to the position where the position of the 3-group moving frame 3 in the optical axis direction is restricted by the stopper. FIG. 4(A) is a cross-sectional view of the mechanical end position when the distance B between the 3a-group lens unit L3a and the 3b-group lens unit L3b is maximum. FIG. 4(B) is a cross-sectional view of the mechanical end position when the distance B between the 3a-group lens unit L3a and the 3b-group lens unit L3b is minimum.

[0038] FIG. 6 is a cross-sectional view at the mechanical end position of the shape in which a stopper of the conventional structure is provided on the 3-group moving frame 103. FIG. 6(A) shows a cross-sectional view of the mechanical end position when the distance B between the 3a-group lens unit L3a and the 3b-group lens unit L3b is maximum. FIG. 6(B) shows a cross-sectional view of the mechanical end position when the distance B between the 3a-group lens unit L3a and the 3b-group lens unit L3b is minimum.

[0039] By assembling the thickest spacer washer 17, the distance B between the 3a-group lens unit L3a and the 3b-group lens unit L3b becomes maximum. Also, when setting the distance B to minimum, the spacer washer 17 is not configured.

[0040] In the case of the conventional configuration shown in FIG. 6, when the thickest spacer washer 17 is incorporated to maximize the distance B, the 3a-group lens unit L3a moves toward the subject side with respect to the 3-group moving frame 103. That is, the 3a-group lens unit L3a moves toward the subject side with respect to the main stopper 103a provided on the 3-group moving frame 103. At this time, the distance C from the main stopper 103a to the tip of the convex surface of the 3a-group lens unit L3a becomes maximum, and the distance A between the 3a-group lens unit L3a and the blade 7a of the light quantity adjustment unit 7 becomes minimum.

[0041] In the case of the structure where the three-group moving frame 103 holds the adjustment frame 106, when the lens interval between the three-group moving frame 103 and the adjustment frame 106 is adjusted, the positional relationship in the optical axis direction between the main stopper 103a provided on the three-group moving frame 103 and the 3a-group lens unit L3a which is the adjustment lens changes. For this reason, there is a possibility of interfering with the light quantity adjustment unit 7 which is an adjacent optical element. Therefore, when setting the interval between the 3a-group lens unit L3a and the adjacent light quantity adjustment unit 7, in addition to the manufacturing error, it is also necessary to estimate the adjustment amount, which will lead to an increase in the total lens length. Specifically, when this interval A is smaller than the necessary amount estimated for the manufacturing error, since it is necessary to add the adjustment amount of the interval B to the interval A, the overall optical length increases.

[0042] Also, when the interval B is minimized without incorporating the interval adjustment washer 17, the 3a-group lens unit L3a moves toward the image plane side with respect to the three-group moving frame 103. That is, the 3a-group lens unit L3a moves toward the image plane side with respect to the main stopper 103a provided on the three-group moving frame 103. At this time, the distance C from the main stopper 103a to the 3a-group lens unit L3a becomes the minimum, and the interval A between the 3a-group lens unit L3a and the blade 7a of the light quantity adjustment unit 7 becomes the maximum.

[0043] In the case of the present embodiment shown in FIG. 4, when the thickest interval adjustment washer 17 is incorporated to maximize the interval B, the 3a-group lens unit L3a moves toward the subject side with respect to the three-group moving frame 3 in the same manner. However, since the main stopper 6b is provided on the adjustment frame 6 that holds the 3a-group lens unit L3a, the distance C from the main stopper 6b to the tip of the convex surface of the 3a-group lens unit L3a does not change. That is, the interval A between the 3a-group lens unit L3a and the blade 7a of the light quantity adjustment unit 7 also does not change.

[0044] Furthermore, when the interval B is minimized without incorporating the interval adjustment washer 17, the 3a-group lens unit L3a moves toward the image plane side with respect to the 3-group moving frame 3. At this time, since the main stopper 6b is provided on the adjustment frame 6 that holds the 3a-group lens unit L3a, the distance C from the main stopper 6b to the 3a-group lens unit L3a does not change. That is, the interval A between the 3a-group lens unit L3a and the blade 7a of the light quantity adjustment unit 7 also does not change.

[0045] In this way, by providing the main stopper 6b on the adjustment frame 6, when the moving group that adjusts the interval within the group moves to the mechanical end, it is not necessary to consider the adjustment amount within the group for the interval with the adjacent optical element (light quantity adjustment unit 7), and the overall optical length can be reduced.

[0046] Next, with reference to FIGS. 5 and 7, the effect of reducing the peeling of the adhesive when a stopper is provided on the adjustment frame 6 of the present embodiment will be described. FIG. 7 is a cross-sectional view at the position of the mechanical end after the eccentricity adjustment when the stopper of the conventional structure is provided on the 3-group moving frame 103. When adjusting the interval and eccentricity of other lenses within the moving group with respect to the reference lens within the moving group, there are cases where the adjustment workability and the fixing after adjustment become unstable for each lens. Therefore, an adjustment frame 106 for holding each lens is provided. The adjustment frame 106 is parallel-eccentrically adjusted by D in the direction orthogonal to the optical axis with respect to the 3-group moving frame 103. After the eccentricity adjustment, an adhesive 19 is applied to the adhesive groove 103b of the 3-group moving frame 103. The inner diameter and bottom surface of the adhesive groove 103b and the outer diameter of the adjustment frame 106 are adhered by the adhesive 19.

[0047] When the 3-group moving frame 103 moves toward the mechanical end, the movement of the 3-group moving frame 103 in the optical axis direction is restricted by the main stopper 103a provided on the 3-group moving frame 103. At this time, since an inertial force F is generated in the direction of the arrow on the adjustment frame 106, the adjustment frame 106 tends to move toward the subject side with respect to the 3-group moving frame 103. For this reason, a force in the peeling direction acts on the adhesive 19.

[0048] FIG. 5 is a cross-sectional view at the mechanical end position after eccentric adjustment when the stopper of this embodiment is provided on the adjustment frame 6. The adjustment frame 6 is parallel-eccentrically adjusted by D in the direction orthogonal to the optical axis with respect to the three-group moving frame 3. After the eccentric adjustment, an adhesive 19 is applied to the adhesive groove 3b of the three-group moving frame 3. The inner diameter and bottom surface of the adhesive groove 3b and the outer diameter of the adjustment frame 6 are adhered by the adhesive 19.

[0049] In this embodiment, since the main stopper 6b is provided on the adjustment frame 6, the position orthogonal to the optical axis of the main stopper 6b also moves by D in the optical axis direction. At this time, the stopper 9a formed on the middle fixed lens barrel 9 that abuts against the main stopper 6b has a sufficiently large area with respect to the main stopper 6b so that it can abut even when the adjustment frame 6 is parallel-eccentric. That is, the contact surface of the stopper 9a with the main stopper 6b has a larger area than the contact surface on the main stopper 6b side. Specifically, when the shape of the contact surface of the stopper 9a is circular, the diameter of the contact surface of the stopper 9a is set so that R>r + D holds. Here, R represents the diameter of the stopper 9a, r represents the diameter of the main stopper 6b, and D represents the amount of parallel eccentricity of the adjustment frame 6. Here, as an example, the shapes of the contact surfaces of the stopper 9a and the main stopper 6b are circular, but other shapes may also be used. For example, when the shapes of the contact surfaces of the stopper 9a and the main stopper 6b are rectangular, R is replaced with the length of the side of the stopper 9a and r is replaced with the length of the side of the main stopper 6b.

[0050] When the three-group moving frame 3 moves to the mechanical end, the main stopper 6b provided on the adjustment frame 6 and the stopper 9a come into contact with each other to restrict the position of the adjustment frame 6, and the position of the three-group moving frame 3 is restricted by the adjustment frame 6. That is, when the main stopper 6b is provided on the adjustment frame 6, when the three-group moving frame 3 moves to the mechanical end, no inertial force acts on the adjustment frame 6, so the risk of the adhesive peeling off can be reduced.

[0051] As described above, by providing the mechanical stopper that determines the mechanical end on the adjustment frame that optically adjusts the moving group, it is possible to miniaturize the overall optical length and improve the reliability.

[0052] Moreover, by configuring an imaging device having the lens barrel 100 of the present embodiment and an imaging element 40 that captures an image formed by the lens barrel 100, an imaging device that enjoys the effects of the present invention can be provided. Note that the imaging device is, for example, a digital video camera, but is not limited thereto, and may be a digital still camera, a digital single-lens reflex camera, or the like.

[0053] The disclosure of the present embodiment includes the following configurations. (Configuration 1) A moving group having a first optical element and a second optical element arranged along the optical axis, A third optical element that is adjacent to the second optical element in the optical axis direction and is fixed to a first fixed frame, A moving frame that holds the first optical element and is movable in the optical axis direction, An adjustment frame that holds the second optical element so as to be adjustable with respect to the position of the first optical element and is fixed to the moving frame after the position adjustment, A first stopper portion is formed on the adjustment frame, A lens barrel characterized in that a second stopper portion that can contact the first stopper portion is formed on the first fixed frame.

[0054] (Configuration 2) The lens barrel according to Configuration 1, characterized in that in a state where the first stopper portion and the second stopper portion are in contact with each other, the moving frame and the first fixed frame, and the second optical element and the third optical element do not contact each other.

[0055] (Configuration 3) The lens barrel according to Configuration 1 or 2, further comprising a second fixed frame that holds the moving frame and the adjustment frame fixed to the moving frame together with the first fixed frame so that the moving group is movable in the optical axis direction.

[0056] (Configuration 4) The third optical element is disposed between the first fixed frame and the second optical element along the optical axis. The first stopper portion and the second stopper portion are disposed on the outer peripheral side of the third optical element, and the lens barrel according to Configuration 3 is characterized in that.

[0057] (Configuration 5) The lens barrel according to any one of Configurations 1 to 4, wherein the first stopper portion is formed on an arm portion extending in the outer peripheral direction of the adjustment frame.

[0058] (Configuration 6) The lens barrel according to any one of Configurations 1 to 5, wherein the adjustment frame holds the second optical element so as to be adjustable in the optical axis direction and the direction orthogonal to the optical axis with respect to the first optical element.

[0059] (Configuration 7) The lens barrel according to any one of Configurations 1 to 6, wherein the contact surface of the second stopper portion with the first stopper portion has a larger area than the contact surface on the first stopper portion side.

[0060] (Configuration 8) The lens barrel according to any one of Configurations 1 to 7, further comprising an actuator for driving the moving frame.

[0061] (Configuration 9) The lens barrel according to any one of Configurations 1 to 8, wherein the adjustment frame is fixed to the moving frame by adhesion.

[0062] (Configuration 10) An imaging device, comprising: a lens barrel according to any one of Configurations 1 to 9; and an imaging element that receives an image formed by the lens barrel.

Description of Reference Numerals

[0063] 3-group moving frame L3 3-group lens unit 6 Adjusting Frame 6b Main Stopper 6c Sub Stopper 7 Light Quantity Adjustment Unit 7a Blade 9 Middle Fixed Lens Barrel 9a Stopper 10 Rear Fixed Lens Barrel 100 Lens Barrel

Claims

1. A moving group having a first optical element and a second optical element arranged along an optical axis, A third optical element that is adjacent to the second optical element in the optical axis direction and is fixed to a first fixed frame, A moving frame that holds the first optical element and is movable in the optical axis direction, An adjustment frame that holds the second optical element so as to be adjustable with respect to the position of the first optical element and is fixed to the moving frame after the position adjustment, A first stopper portion is formed on the adjustment frame, A lens barrel, characterized in that a second stopper portion capable of abutting against the first stopper portion is formed on the first fixed frame.

2. The lens barrel according to claim 1, characterized in that in a state where the first stopper portion and the second stopper portion are in contact with each other, the moving frame and the first fixed frame, and the second optical element and the third optical element do not contact each other.

3. The lens barrel according to claim 1, further comprising a second fixed frame that holds the moving group so as to be movable in the optical axis direction by holding the moving frame and the adjustment frame fixed to the moving frame together with the first fixed frame.

4. The third optical element is arranged between the first fixed frame and the second optical element along the optical axis, The lens barrel according to claim 3, characterized in that the first stopper portion and the second stopper portion are arranged on the outer peripheral side of the third optical element.

5. The lens barrel according to claim 1, characterized in that the first stopper portion is formed on an arm portion extending in the outer peripheral direction of the adjustment frame.

6. The lens barrel according to claim 1, characterized in that the adjustment frame holds the second optical element so as to be adjustable in the optical axis direction and a direction orthogonal to the optical axis with respect to the first optical element.

7. The lens barrel according to claim 1, characterized in that the contact surface of the second stopper portion with the first stopper portion has a larger area than the contact surface on the first stopper portion side.

8. The lens barrel according to claim 1, further comprising an actuator for driving the moving frame.

9. The lens barrel according to claim 1, characterized in that the adjustment frame is fixed to the moving frame by adhesion.

10. An imaging device comprising: a lens barrel according to any one of claims 1 to 9; and an imaging element that receives an image formed by the lens barrel.

Images