Operation ring, lens device, and method for manufacturing operation ring

Abstract

The invention provides an operation ring, a lens device and a manufacturing method of the operation ring, wherein the rotation position can be detected with high resolution under the condition that rotation operation is carried out. A lens barrel (12) is provided with a zoom ring (23), an optical system, and an electric zoom mechanism that drives a zoom lens group, which is a part of the optical system, in accordance with the rotation of the zoom ring (23). The zoom ring (23) has: a ring member (41); a first recess (43) formed in the ring member (41); and a plating layer (42) applied to the first recessed portion (43) on which an inclined portion is formed.

Description

Technical Field

[0001] The invention relates to an operating ring, a lens device and a manufacturing method of the operating ring. Background Art

[0002] Patent Document 1 describes an imaging device including: an optical component; a focus motor for moving the optical component; a lens CPU for controlling the focus motor; a manual focus ring including a reflective portion and a low-reflective portion; and a light reflector for receiving light reflected by the reflective portion. The lens CPU controls the focus motor based on output from the light reflector.

[0003] The lens device described in Patent Document 2 includes an operating ring that is rotated, a light-emitting element that emits light, and a plurality of light-receiving elements, and is provided with a detection pattern portion having a reflective surface and a non-reflective surface that are alternately arranged along the rotation direction of the operating ring and move with the rotation of the operating ring. The light-emitting element emits light to the detection pattern portion. The plurality of light-receiving elements are arranged on the same substrate and receive reflected light from the reflective surface.

[0004] Previous technical literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-071541

[0007] Patent Document 2: Japanese Patent No. 6973398 Summary of the invention

[0008] One embodiment of the technology according to the present invention provides an operation ring, a lens device, and a method for manufacturing an operation ring that can detect a rotational position with high resolution when a rotational operation is performed.

[0009] Means for solving technical problems

[0010] An operating ring according to one aspect of the technology of the present invention includes a ring member, a first recessed portion, and a plating layer, wherein an inclined portion is formed on the first recessed portion. The first recessed portion is formed in the ring member. The plating layer is applied to the first recessed portion.

[0011] Preferably, a plurality of first recessed portions are formed on the inner peripheral surface of the ring member, and a plating layer is applied to the plurality of first recessed portions to form a pattern serving as an index for the rotation operation on the inner peripheral surface.

[0012] Preferably, the first recessed portion includes a first surface portion located radially outwardly of an inner peripheral surface of the ring member, and a second recessed portion recessed radially outwardly of the first surface portion.

[0013] The second recessed portion is preferably a groove portion formed at an end portion of the first surface portion in the circumferential direction. The second recessed portion is preferably formed at both end portions of the first surface portion in the circumferential direction.

[0014] The second recessed portion preferably includes a position where a surface including the first surface portion intersects with the inclined portion. The inclined portion preferably inclines inwardly at an inclination angle of 5° or more and 30° or less relative to the radial direction. The inclined portion preferably has a curved surface shape.

[0015] It is preferable that the size of the first surface portion of the first recessed portion is smaller than the size in the circumferential direction of the ring member, that is, the size of the inlet portion that contacts the inner peripheral surface of the ring member.

[0016] The material of the operating ring is preferably a carbon fiber composite material. The plated portions are preferably arranged at equal intervals in the circumferential direction of the operating ring. The equal intervals are preferably intervals of 0.2 mm or more and 0.3 mm or less.

[0017] A lens device according to one aspect of the technology of the present invention includes the above-described operation ring, an optical system, and an electric zoom mechanism that drives a zoom lens group that is a part of the optical system according to the rotation of the operation ring.

[0018] Preferably, the optical system comprises at least a zoom lens group, a first lens group, a filter and an aperture, the maximum outer diameter portion of the filter is larger than the maximum outer diameter portion of the first lens group and is located closer to the subject than the first lens group, the zoom lens group is located between the first lens group and the aperture and is located closer to the subject than the aperture, and the pattern is located between the maximum outer diameter portion of the first lens group and the maximum outer diameter portion of the filter.

[0019] An operating ring according to one aspect of the present invention includes a ring member, a first recessed portion, and a plating layer, wherein the inner peripheral surface of the ring member and the plating layer are flush with each other. The first recessed portion is formed in the ring member. The plating layer is applied to the first recessed portion.

[0020] Preferably, a plurality of first recessed portions are formed on the inner peripheral surface of the ring member, and a plating layer is applied to the plurality of first recessed portions to form a pattern serving as an index for the rotation operation on the inner peripheral surface.

[0021] A method for manufacturing an operating ring according to one aspect of the technology of the present invention includes: forming a first recessed portion in a ring member; forming an inclined portion in the first recessed portion; and plating the first recessed portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded perspective view of a digital camera.

[0023] Figure 2 It is a side view of a digital camera.

[0024] Figure 3 This is a cross-sectional view of the main parts of the lens barrel.

[0025] Figure 4It is a three-dimensional diagram of the electric zoom mechanism.

[0026] Figure 5 This is a cross-sectional view of the main parts of the lens barrel cut along the circumference.

[0027] Figure 6 This is a circuit diagram showing an example of a sensor that detects the rotational position and rotational direction of the operating ring.

[0028] Figure 7 This is a three-dimensional diagram of the operating ring and the sensor.

[0029] Figure 8 This is a perspective view in which a part of the ring member is enlarged.

[0030] Fig. 9 This is a cross-sectional view of the main part of the ring member cut at the first recessed portion peripheral member.

[0031] Fig.10 This is an explanatory diagram for explaining the inclination angle of the inclined portion of the first recess.

[0032] Fig.11 This is a perspective view of a part of the operation ring enlarged.

[0033] Fig.12 It is a cross-sectional view of a main part for explaining the arrangement of a pattern formed on the operation ring.

[0034] Fig.13 This is a block diagram showing a schematic structure of a digital camera.

[0035] Fig.14 It is an explanatory diagram for explaining a method of manufacturing an operating ring.

[0036] Fig.15 is a flow chart showing the process of manufacturing the operating ring.

[0037] Fig.16 It is a cross-sectional view of a main part of the operating ring in the second embodiment.

[0038] Fig.17 This is a perspective view in which a part of the ring member in the second embodiment is enlarged.

[0039] Fig.18 This is a cross-sectional view of the main part of the ring member in the second embodiment cut around the first recessed portion.

[0040] Fig.19 It is a cross-sectional view of a main part of the operating ring in the third embodiment.

[0041] Fig. 20 It is an explanatory diagram for explaining the inclination angle of the inclined portion and the position of the second recessed portion in the third embodiment.

[0042] Fig.21 It is a cross-sectional view of the main part of the operating ring in the fourth embodiment. DETAILED DESCRIPTION

[0043] [First embodiment]

[0044] [Structure of a digital camera]

[0045] like Figure 1 As shown, the digital camera 10 includes a camera body 11 and an interchangeable lens barrel 12. A lens mount 13, a release switch 14, a power switch (not shown), etc. are provided on the front surface of the camera body 11. The lens mount 13 has a circular camera opening 13A. The lens barrel 12 is detachably mounted on the lens mount 13. The lens barrel 12 is an example of the lens device involved in the present invention.

[0046] The camera body 11 has an imaging element 16 built in. The imaging element 16 is, for example, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, a CCD (Charge Coupled Device) image sensor, or an organic thin film imaging element. The lens mount 13 is provided with a body-side signal contact 17 (see FIG. 1 ) on the inner side of the imaging opening 13A for electrically connecting to the lens barrel 12 for communication. Fig.13 ). In addition, the camera body 11 has a handle portion 11A.

[0047] [Structure of the lens unit]

[0048] like Figure 2 As shown, the lens barrel 12 includes a lens barrel body 21, an imaging optical system 22, a zoom ring 23, a focus ring 24, and an electric zoom mechanism 25 (see Figure 3 ) and focusing mechanism 26 (reference Figure 3 ). The zoom ring 23 is equivalent to the operation ring in the claims.

[0049] The lens barrel body 21 is cylindrical in shape, and holds an imaging optical system 22, a zoom ring 23, a focus ring 24, an electric zoom mechanism 25, and a focus mechanism 26 inside, and a lens mount 27 is provided at the rear end (refer to FIG. Figure 3 and Fig.13 ) and lens side signal contact 28 (reference Fig.13 ). When the lens barrel 12 is mounted on the camera body 11 , the imaging optical system 22 forms an image of subject light on the imaging element 16 .

[0050] The imaging optical system 22 includes a filter 22A, a first lens group 22B, a second lens group 22C, an aperture 22D, a third lens group 22E, a fourth lens group 22F and a fifth lens group 22G which are arranged in sequence along the optical axis OA from the subject side toward the imaging element side.

[0051] Among the first lens group 22B, the second lens group 22C, the third lens group 22E, the fourth lens group 22F, and the fifth lens group, the first lens group 22B has the largest outer diameter. The optical filter 22A is a filter such as a polarizing filter or a light quantity adjustment filter. The maximum outer diameter of the optical filter 22A is larger than the maximum outer diameter of the first lens group 22B. The optical filter 22A and the first lens group 22B are fixed to the front end of the lens barrel body 21.

[0052] The second lens group 22C is equivalent to the zoom lens in the claims. In the lens barrel 12, the second lens group 22C is moved along the optical axis OA to perform magnification change. The second lens group 22C is moved by the electric zoom mechanism 25. The electric zoom mechanism 25 drives the second lens group 22C according to the rotation of the zoom ring 23. The second lens group 22C is located at the wide-angle side ( Figure 3 The lens moves between the position indicated by the solid line on the focal length side (indicated by the solid line) and the position on the telephoto side (indicated by the double-dashed line).

[0053] The aperture 22D is a fixed aperture with a fixed open aperture value, and an aperture opening 22H is formed in the center of the thin plate member. The aperture 22D is fixed inside the lens barrel body 21. In addition, the aperture 22D is not limited to this, and can also be a variable aperture composed of an aperture mechanism that makes the open aperture value variable. The third lens group 22E is a relay lens group fixed inside the lens barrel body 21.

[0054] The 4th lens group 22F is a focusing lens. In the lens barrel 12, the focus is adjusted by moving the 4th lens group 22F in the direction of the optical axis OA. The 4th lens group 22F is moved by the focusing mechanism 26. The focusing mechanism 26 drives the 4th lens group 22F according to the rotation of the focusing ring 24. The 5th lens group 22G is a relay lens group fixed to the rear end of the lens barrel body 21. The 5th lens group 22G forms an image on the imaging element by the real image transmitted by the filter 22A, the 1st lens group 22B, the 2nd lens group 22C, the aperture 22D, the 3rd lens group 22E and the 4th lens group 22F.

[0055] The electric zoom mechanism 25 is arranged inside the lens barrel 12. The electric zoom mechanism 25 drives the second lens group 22C, which is a part of the imaging optical system 22. The electric zoom mechanism 25 is mounted on the lens barrel main body 21 via the mounting member 29 or the like. As described above, the second lens group 22C is located between the first lens group 22B and the aperture 22D, and is located closer to the subject side than the aperture 22D. That is, the second lens group 22C can move between the first lens group 22B and the aperture 22D.

[0056] like Figure 4 As shown, the second lens group 22C is held by a lens holding frame 31. The lens holding frame 31 is connected to a zoom slide 35 described later. The electric zoom mechanism 25 includes two guide shafts 32 and a lead screw 33, a motor 34, and a zoom slide 35. The lens control unit 51 controls the power supply to the motor 34 via a motor driver 52. In addition, as described later, the lens control unit 51 controls various parts of the lens barrel 12.

[0057] The guide shaft 32 is a cylindrical shaft made of metal or resin. The front end and the base end of the guide shaft 32 are mounted to the lens barrel body 21 directly or via the mounting member 29. The lens holding frame 31 is mounted to the guide shaft 32 so as to be movable along the optical axis OA direction.

[0058] The lead screw 33 is a substantially cylindrical shaft formed of metal or resin and having a screw 33A on the outer periphery. The lead screw 33 is connected to the rotating shaft of the motor 34 and rotated in two directions by the motor 34. The motor 34 is, for example, a stepping motor.

[0059] The zoom slide 35 is connected to the lens holding frame 31, and moves along the guide shaft 32, that is, the optical axis OA direction together with the second lens group 22C and the lens holding frame 31. The zoom slide 35 has a rack gear 35A formed on the surface facing the lead screw 33. The zoom slide 35 applies force to the screw 33A of the lead screw 33 through a spring member (not shown). The rack gear 35A meshes with the screw 33A. As a result, the rotation of the lead screw 33 is converted into a linear motion through the screw 33A and the rack gear 35A, and the second lens group 22C moves along the optical axis OA direction together with the lens holding frame 31.

[0060] The lens control unit 51 uses the sensor 36 (reference Figure 5 to Figure 7 and Fig.13 ) detects the rotational position of the zoom ring 23, and moves the second lens group 22C based on the information of the rotational direction and the rotational position. The sensor 36 is a sensor capable of high-resolution detection, and a photo reflector is used, for example.

[0061] The focusing mechanism 26 is composed of a voice coil motor (hereinafter referred to as VCM) and has a magnetic circuit and a coil (not shown). The fourth lens group 22F is held by a lens holding frame 37. The magnetic circuit and the coil are connected to the lens holding frame 37. In the focusing mechanism 26, the lens holding frame 37 and the fourth lens group 22F are driven by the magnetic force generated by energizing the coil.

[0062] The lens control unit 51 uses the sensor 38 (reference Fig.13 ) detects the rotation position of the focus ring 24, and moves the fourth lens group 22F according to the information of the rotation direction and the rotation amount. In addition, the structure of the focus mechanism 26 is not limited to this, and it can also be equipped with a lead screw and a motor, etc., similar to the electric zoom mechanism 25, and the rotation of the lead screw is converted into a linear motion, so that the fourth lens group 22F is moved along the optical axis OA.

[0063] [Sensor structure]

[0064] like Figure 5 As shown, the sensor 36 is mounted on the opening 21A formed on the lens barrel body 21. The sensor 36 is arranged at a position opposite to the inner circumference of the zoom ring 23. A pattern 44 described later is formed on the inner circumference of the zoom ring 23, and the rotation direction and rotation position of the zoom ring 23 can be detected by obtaining a signal based on the pattern 44 from the sensor 36.

[0065] Figure 6 An example of a circuit constituting the sensor 36 is shown in FIG. Figure 5 In the example shown, the sensor 36 includes an LED (light-emitting diode) 36A and three light receiving ICs (Integrated Circuits) 36B, 36C, and 36D on a substrate. The sensor 36 is arranged so that the phase difference of the output signals of the light receiving ICs 36B, 36C, and 36D is 90 degrees each.

[0066] The sensor 36 of the above structure can output digital two-phase signals Vout1 and Vout2 with a phase P shifted by 90° by emitting and receiving light on a pattern having a low-reflection portion and a high-reflection portion. The rotation direction and rotation position can be detected by these two-phase signals Vout1 and Vout2. Moreover, by detecting the rise / fall of the two-phase signals Vout1 and Vout2 of the sensor 36, a resolution of 1 / 4 of the pattern period can be obtained.

[0067] [Structure of the operating ring]

[0068] like Figure 7 As shown in FIG. 2 , the zoom ring 23 includes a ring member 41 and a coating 42. Figure 8 As shown, the ring member 41 is formed with a first recessed portion 43. The first recessed portion 43 is, for example, a recessed portion formed by irradiating the inner peripheral surface 41A of the ring member 41 with laser light. The first recessed portion 43 is preferably in a linear shape parallel to the optical axis OA.

[0069] The first recess 43 is a recess that is recessed radially outwardly relative to the inner circumferential surface 41A of the ring member 41. The radial direction referred to herein refers to the radial direction of the ring member 41, which is a direction orthogonal to the optical axis OA when the zoom ring 23 is assembled to the lens barrel body 21, and the same applies hereinafter.

[0070] The plating layer 42 is applied to the first recess 43. The plating layer 42 is formed by metalizing the electroless plating catalyst through electroless plating. The material of the plating layer 42 can be any metal material that metalizes the electroless plating catalyst, such as palladium, nickel, etc. The material of the ring component 41 is a carbon fiber composite material. The ring component 41 is formed in an annular shape and has knurling formed on the outer peripheral surface 41B. The ring component 41 is embedded in the lens barrel body 21. The first recess 43 is formed in plurality on the inner peripheral surface 41A of the ring component 41.

[0071] like Fig. 9 As shown, the first recessed portion 43 includes a first surface portion 43A and inclined portions 43B and 43C. The first surface portion 43A is located radially outward from the inner peripheral surface 41A of the ring member 41. Figure 8 to Figure 10 The ring member 41 is shown in a state before the plating layer 42 is applied thereto.

[0072] like Fig.10 As shown, the inclined portion 43B is inclined relative to the radial direction V of the ring member 41. Specifically, the inclined portion 43B is inclined at an inclination angle α of 5° or more and 30° or less in the inner direction relative to the radial direction V. In addition, the inner direction mentioned here refers to the direction in which the inclined portion 43B is inclined toward the inner side of the ring member 41.

[0073] The inclined portion 43C is also inclined at an inclination angle α of 5° to 30° inwardly relative to the radial direction V, similarly to the inclined portion 43B. The inclined portions 43B and 43C are curved. Specifically, the inclined portions 43B and 43C are curved and convex toward the inside of the ring member 41 .

[0074] In the conventional operating ring, when a recess is formed on the ring component and a plating layer is applied, the side surface of the recess is formed at a right angle to the surface of the ring component. That is, since there is a right angle corner where the surface of the ring component and the side surface of the recess intersect, the plating catalyst or reducing agent forming the plating layer is blocked by the right angle corner and sometimes has difficulty entering the recess. In addition, the range of the inclination angle α described in this specification is a preferred range, and a certain effect can be achieved even outside the range.

[0075] In contrast, in the zoom ring 23 of the present embodiment, since the first recess 43 has the inclined portions 43B and 43C, when the plating layer 42 is applied to the ring member 41, the plating catalyst and the reducing agent forming the plating layer 42 can easily enter the first recess 43. Furthermore, by forming the inclined portions 43B and 43C into a curved surface, the plating catalyst and the reducing agent forming the plating layer 42 can easily enter the first recess 43.

[0076] Furthermore, the dimension L2 of the first surface portion 43A of the first recess 43 is smaller than the dimension in the circumferential direction R of the ring member 41, that is, the dimension L1 of the inlet portion that contacts the inner circumferential surface 41A of the ring member 41. That is, the first recess 43 is a trapezoidal recess whose dimension in the circumferential direction R gradually decreases toward the outer side in the radial direction V. Thus, the plating catalyst and the reducing agent that form the plating layer 42 can more easily enter the first recess 43.

[0077] The zoom ring 23 has a plurality of first recesses 43 formed on the inner circumferential surface 41A of the ring member 41, and a pattern 44 that serves as an indicator of the rotation operation is formed on the inner circumferential surface 41A by applying a plating layer 42. The plating layer 42 applied to the first recesses 43 is a high-reflection portion that reflects light because it is made of a metal material. As described above, the material of the ring member 41 is a carbon fiber composite material, so it serves as a low-reflection portion that reflects less light than the plating layer 42. That is, a pattern 44 is formed in which the portions between the plating layer 42 that serves as a high-reflection portion and the plating layer 42 that serves as a low-reflection portion are alternately arranged. As described above, by combining the pattern 44 with the sensor 36, the rotation direction and rotation amount of the zoom ring 23 can be detected.

[0078] like Fig.11 As shown, the pattern 44 is arranged with portions to which the plating 42 is applied at equal intervals in the circumferential direction R of the zoom ring 23. That is, the width T1 of the plating 42 in the circumferential direction R and the width T2 of the portion between the plating 42 become constant dimensions. In addition, it is preferable to set the widths T1 and T2 to an interval of 0.2 mm or more and 0.3 mm or less. In this way, by forming a fine pattern 44, the rotation position of the zoom ring 23 can be detected with high resolution.

[0079] like Fig.12As shown, the pattern 44 is located between the maximum outer diameter of the first lens group 22B and the maximum outer diameter of the filter 22A. Symbol S is the space between the maximum outer diameter of the first lens group 22B and the maximum outer diameter of the filter 22A, and the pattern 44 is arranged in the space S. As described above, the second lens group 22C and the electric zoom mechanism 25 for driving the second lens group 22C are arranged on the base end side (imaging element side) of the first lens group 22B, and there is little space for arranging components. Therefore, the pattern 44 is arranged at a position that does not interfere with the second lens group 22C and the electric zoom mechanism 25, etc., to improve the efficiency of component arrangement. The maximum outer diameter of the filter 22A is larger than that of the first lens group 22B, and is located at a position closer to the subject side than the first lens group 22B. That is, the above-mentioned space S is inside the lens barrel 12, and the component arrangement is relatively loose. By arranging the pattern 44 in such a space S, the efficiency of component arrangement can be improved, and the miniaturization of the lens barrel 12, especially the miniaturization of the outer diameter, can be achieved.

[0080] [Electrical structure of digital camera]

[0081] like Fig.13 As shown, the lens barrel 12 includes an imaging optical system 22 , a zoom ring 23 , a focus ring 24 , an electric zoom mechanism 25 , a focus mechanism 26 , a sensor 36 , a sensor 38 , a lens control unit 51 , a motor driver 52 , a VCM driver 53 , and the like.

[0082] The lens control unit 51 is composed of a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory) storing programs and parameters used in the CPU, and a RAM (Random Access Memory) used as a working memory of the CPU (none of which are shown in the figure), and controls various parts of the lens barrel 12. The lens control unit 51 is connected to a motor driver 52, a VCM driver 53, and sensors 36 and 38.

[0083] The lens control unit 51 controls the driving of the second lens group 22C based on a control signal from the camera body control unit 61 described later. The lens control unit 51 detects the rotation position of the zoom ring 23 through the sensor 36, and moves the second lens group 22C based on information on the rotation direction and rotation amount.

[0084] As described above, the imaging optical system 22 includes a plurality of lens groups including the second lens group 22C and the fourth lens group 22F. Fig.13In order to prevent the drawing from being complicated, lens groups other than the second lens group 22C and the fourth lens group 22F are omitted. The second lens group 22C is moved in the direction of the optical axis OA by energizing the motor 34 constituting the electric zoom mechanism 25 from the motor driver 52, and the angle of view of the imaging optical system 22 is magnified. The lens control unit 51 sends a control signal for moving the second lens group 22C to the motor driver 52 based on information on the rotation direction and rotation amount of the zoom ring 23. The motor driver 52 energizes the motor 34 based on the control signal.

[0085] The fourth lens group 22F moves in the direction of the optical axis OA by energizing the coil constituting the focus mechanism 26 from the VCM driver 53, and performs focus adjustment of the imaging optical system 22. The lens control unit 51 sends a control signal for moving the fourth lens group 22F to the VCM driver 53 based on information on the rotation direction and rotation amount of the focus ring 24. The VCM driver 53 energizes the coil based on the control signal.

[0086] The camera body control section 61 includes a CPU, a ROM storing programs and parameters used in the CPU, and a RAM used as a work memory of the CPU (none of which is shown in the figure). The camera body control section 61 controls the camera body 11 and each part of the lens barrel 12 connected to the camera body 11. A release signal is input to the camera body control section 61 from the release switch 14. In addition, the camera body control section 61 is connected to the body side signal contact 17.

[0087] When the lens mount 27 of the lens barrel 12 is mounted on the lens mount 13 of the camera body 11 , the lens-side signal contact 28 contacts the body-side signal contact 17 , and the lens barrel 12 and the camera body 11 are electrically connected.

[0088] The shutter unit 62 is a so-called focal plane shutter, and is arranged between the lens mount 13 and the imaging element 16. The shutter unit 62 is set in a manner that can block the optical path between the imaging optical system 22 and the imaging element 16, and changes between an open state and a closed state. The shutter unit 62 is set to an open state when a live view image and animation are photographed. The shutter unit 62 temporarily changes from an open state to a closed state when a still image is photographed. The shutter unit 62 is driven by a shutter motor 63. The motor driver 64 controls the drive of the shutter motor 63.

[0089] The imaging element 16 is driven and controlled by the camera body control unit 61. The imaging element 16 has a light receiving surface composed of a plurality of pixels (not shown) arranged in a two-dimensional matrix. Each pixel includes a photoelectric conversion element, and performs photoelectric conversion on the subject image formed on the light receiving surface by the imaging optical system 22 to generate an imaging signal.

[0090] In addition, the imaging element 16 is provided with signal processing circuits such as a noise elimination circuit, an automatic gain controller, and an A / D conversion circuit (none of which is shown in the figure). The noise elimination circuit performs noise elimination processing on the image signal. The automatic gain controller amplifies the level of the image signal to an optimal value. The A / D conversion circuit converts the image signal into a digital signal and outputs it from the imaging element 16 to the bus 66. The output signal of the imaging element 16 is image data (so-called RAW data) having one color signal per pixel.

[0091] The image memory 65 stores one frame of image data output to the bus 66. The image data processing unit 67 reads one frame of image data from the image memory 65 and performs known image processing such as matrix operation, demosaicing, gamma correction, brightness / color difference conversion, and resizing.

[0092] The display driver 68 sequentially inputs the image data of one frame processed by the image data processing unit 67 to the image display unit 69. The image display unit 69 is provided, for example, on the back of the camera body 11, and sequentially displays the live preview images at a constant cycle. The card I / F (Interface) 71 is assembled in a card slot (not shown) provided in the camera body 11, and is electrically connected to a memory card 72 inserted into the card slot. The card I / F 71 stores the image data processed by the image data processing unit 67 in the memory card 72. When the image data stored in the memory card 72 is reproduced and displayed, the card I / F 71 reads the image data from the memory card 72.

[0093] [Manufacturing process of operating ring]

[0094] Below, follow Fig.14 The illustrations and Fig.15 The process of manufacturing the zoom ring 23 is described in the flowchart shown in FIG. The zoom ring 23 is manufactured by the MID (Molded Interconnected Device) process. Fig.14 As shown in (A), the ring member 41 is first formed by an injection molding process or the like (S11). Before the pattern 44 is formed, the first recess 43 is not yet formed in the state where the ring member 41 is formed from the carbon fiber composite material by the injection molding process or the like. Fig.14 (B)~ Fig.14 In (E), for the sake of convenience of explanation, the thin film 81 and the electroless plating catalyst 83 are drawn enlarged, but in fact they are much smaller than the figure.

[0095] like Fig.14As shown in (B), as a process before forming the first recess 43, a process (S12) of performing a catalyst deactivation treatment on the surface of the ring member 41 is performed. Specifically, a polymer that becomes a catalyst deactivation material forms a thin film 81 on the surface of the ring member 41. The thin film 81 hinders the activation of the electroless plating catalyst described later. The thickness of the thin film 81 is, for example, less than 1 nm. In addition, Fig.14 In (B), for convenience of illustration, the thin film 81 is formed only on the inner peripheral surface 41A, but in reality, the thin film 81 is formed on the entire surface of the ring member 41 .

[0096] The method for forming the thin film 81 on the surface of the ring member 41 is not particularly limited. For example, a polymer liquid in which a polymer serving as a catalyst deactivating material is dissolved or dispersed in a solvent may be prepared and brought into contact with the ring member 41 to form the thin film 81. As a method for bringing the polymer liquid into contact with the ring member 41, the polymer liquid may be applied to the ring member 41 or the ring member 41 may be immersed in the polymer liquid.

[0097] After the thin film 81 is formed, Fig.14 As shown in (C), a step (S13) of removing a portion of the thin film 81 by laser irradiation is performed to form the first recess 43. Thus, the electroless plating catalyst can be activated in the first recess 43, which is the portion where the thin film 81 is removed.

[0098] Furthermore, in the present embodiment, in the step (S3) of forming the first recessed portion, a step of forming the inclined portions 43B and 43C is also performed. Fig.14 As shown in (C), the laser beam 82 is irradiated in a direction inclined with respect to the radial direction V to form the inclined portions 43B and 43C.

[0099] After a portion of the film 81 is removed and the first recess 43 is formed, the ring member 41 is immersed in an electroless plating catalyst solution containing an ionic metal compound to provide the electroless plating catalyst 83 (S14). By immersing the ring member 41 in the electroless plating catalyst solution, Fig.14 As shown in (D), the electroless plating catalyst 83 enters the first recess 43. That is, in the ring member 41, the electroless plating catalyst 83 is applied to the first recess 43. On the other hand, in the ring member 41, in the portion other than the first recess 43 and where the thin film 81 remains, the electroless plating catalyst 83 is not applied because the catalyst deactivating material inhibits the activation of the electroless plating catalyst.

[0100] Then, after the electroless plating catalyst 83 is applied, the ring member 41 is immersed in an electroless plating solution containing a reducing agent, that is, an electroless plating step (S15) is performed. Fig.14As shown in (E), in the first recess 43, the electroless plating catalyst 83 is metallized by the reducing agent, and the plated layer 42 is applied.

[0101] [Lens device movement]

[0102] The operation of the lens barrel 12 of this embodiment will be described. When the lens barrel 12 is attached to the camera body 11 and a power switch (not shown) is operated by a user who is taking a photo, power is supplied to each unit of the digital camera 10 .

[0103] When the power of the digital camera 10 is turned on, the imaging element 16, the camera body control unit 61, the lens control unit 51, etc. are activated. As described above, the sensor 36 detects the rotational position of the zoom ring 23, and the lens control unit 51 moves the second lens group 22C based on the information of the rotational direction and the rotational position.

[0104] As described above, in the zoom ring 23, since the first recess 43 formed in the ring member 41 has the inclined portions 43B and 43C, the electroless plating catalyst and the reducing agent easily enter the first recess 43. As a result, the accuracy of the plating layer 42 with respect to the first recess 43 can be improved, and the pattern 44 having fine high-reflection portions and low-reflection portions can be formed. As a result, when the zoom ring 23 is rotated, the rotation position of the zoom ring 23 can be detected with high resolution by the sensor 36.

[0105] For example, when the width of the plating layer 42 constituting the pattern 44 is 0.25 mm, and the interval between the plating layers 42 is 0.25 mm, that is, the pattern period is 0.5 mm, the pattern is emitted and received by the sensor 36, and the phase signals Vout1 and Vout2 are obtained. The rotation direction and the rotation position can be detected by these two-phase signals Vout1 and Vout2. Moreover, as described above, by detecting the rise / fall of the two-phase signals Vout1 and Vout2 of the sensor 36, a resolution of 1 / 4 of the pattern period, that is, a change in the rotation position equivalent to 0.125 mm, can be detected.

[0106] Furthermore, since the pattern 44 formed on the zoom ring 23 is formed of the very thin plating layer 42, the thickness and outer diameter of the zoom ring 23 can be reduced. Thus, the size and outer diameter of the lens barrel 12 can be reduced.

[0107] Furthermore, by forming the pattern 44 with the plating layer 42, it is not necessary to set the pattern with a component different from the zoom ring 23, so that the assembly process can be simplified, the number of components can be reduced, and the cost can be reduced. In addition, in the lens barrel 12, in order to make the zoom ring 23 rotate smoothly, a lubricant such as grease needs to be applied to the inner circumference, but since the plating layer 42 is resistant to the lubricant, the lubricant application process can be easily performed, and there is no need to wipe off the excess lubricant. Therefore, it is also possible to further reduce the cost of the lens barrel 12.

[0108] [Second embodiment]

[0109] In the above-mentioned first embodiment, the accuracy of the plating layer 42 is improved by having the first recess 43 having the inclined portions 43B and 43C, but the present invention is not limited to this. In the second embodiment described below, a structure is illustrated in which the second recess is recessed radially outward more than the first surface portion of the first recess.

[0110] like Fig.16 As shown in FIG. 1 , the zoom ring 90 in the present embodiment includes a ring member 91 and a plating layer 92. The zoom ring 90 is equivalent to the operating ring in the claims. In addition, the structure of the lens device such as the imaging optical system 22 and the electric zoom mechanism 25, except for the zoom ring 90, is the same as that in the above-mentioned embodiment, and the description thereof is omitted. Furthermore, by applying the plating layer 92 to the ring member 91, the pattern formed on the inner peripheral surface 91A is a pattern that serves as an index of the rotation operation, similarly to the pattern 44 in the above-mentioned first embodiment, and the portions to which the plating layer 92 is applied are arranged at equal intervals with respect to the circumferential direction R of the zoom ring 90.

[0111] like Fig.17 As shown, the ring member 91 is formed with a first recessed portion 93. The first recessed portion 93 is a recessed portion that is recessed radially outward from the inner peripheral surface 91A of the ring member 91. The first recessed portion 93 is preferably in a linear shape parallel to the optical axis OA.

[0112] The plating layer 92 is applied to the first recess 93. The plating layer 92 is formed by metallizing the electroless plating catalyst by electroless plating treatment, similarly to the plating layer 42 of the first embodiment. The ring member 91 is made of a carbon fiber composite material. The ring member 91 is externally embedded in the lens barrel body 21. A plurality of first recesses 93 are formed on the inner peripheral surface 91A of the ring member 91.

[0113] like Fig.18 As shown, the first recessed portion 93 has a first face portion 93A and side surfaces 93B and 93C. The first face portion 93A is located radially outward from the inner peripheral surface 91A of the ring member 91. The side surfaces 93B and 93C are surfaces located between the first face portion 93A and the inner peripheral surface 91A. Fig.17 and Fig.18The state before the plating layer 92 is applied to the ring member 91 is shown.

[0114] The first recessed portion 93 is formed with second recessed portions 93D and 93E. The second recessed portions 93D and 93E are recessed portions that are recessed radially outward from the first face portion 93A. The second recessed portions 93D and 93E are formed at both ends of the first face portion 93A in the circumferential direction R. In addition, the present invention is not limited thereto, and only one of the second recessed portions 93D and 93E may be formed at the end of the first face portion 93A in the circumferential direction R. Fig.17 and Fig.18 In the example shown, the second recessed portions 93D and 93E are groove portions having a rectangular cross section, but may be groove portions having a V-shaped or U-shaped cross section.

[0115] As a process for manufacturing the zoom ring 90, the zoom ring 90 is manufactured by the MID process, similar to the manufacturing process of the zoom ring 23 in the first embodiment. That is, the plating layer 92 is formed on the first recess 93 of the ring member 91 by performing each process of injection molding, catalyst deactivation treatment, removal of a portion of the film, first recess formation, catalyst application, and electroless plating. In addition, in this case, in the process of forming the first recess 93, the process of forming the second recesses 93D and 93E is also performed. For example, compared with the case of forming the first recess 93, the irradiation width of the laser is reduced to form the second recesses 93D and 93E.

[0116] As described above, the zoom ring 90 is provided with the first recess 93 and the second recesses 93D and 93E which are recessed radially outwardly from the first surface 93A of the first recess 93. Thus, in the process of forming the plating layer 92, the electroless plating catalyst and the reducing agent enter the first recess 93 and the second recesses 93D and 93E, so that surface tension is not easily generated. That is, the accumulation of the electroless plating catalyst and the reducing agent relative to the inner peripheral surface 91A is small, and a thin plating layer 92 can be formed. Therefore, similarly to the first embodiment described above, the accuracy of the plating layer 92 relative to the first recess 93 can be improved, and a pattern having fine high-reflection parts and low-reflection parts can be formed. Thus, when the zoom ring 90 is rotated, the rotation position of the zoom ring 90 can be detected with high resolution by the sensor 36.

[0117] Furthermore, by forming the pattern formed on the zoom ring 90 with the plating layer 92 , the same effects as those of the first embodiment can be obtained, such as miniaturization of the lens barrel 12 , cost reduction, simplification of the process, and reduction in the number of processes.

[0118] [Third embodiment]

[0119] In the above-mentioned first embodiment, the first recess 43 has inclined portions 43B and 43C, and in the above-mentioned second embodiment, the first recess 93 has second recesses 93D and 93E. However, in the third embodiment described below, both the inclined portion and the second recess are formed in the first recess.

[0120] like Fig.19 As shown in FIG. 1 , the zoom ring 95 in the present embodiment includes a ring member 96 and a coating member 97. The zoom ring 95 corresponds to the operating ring in the claims. In addition, the structure of the lens device such as the imaging optical system 22 and the electric zoom mechanism 25 is the same as that in the above-mentioned embodiment except for the zoom ring 95, and the description thereof is omitted. Furthermore, by applying the coating 97 to the ring member 96, the pattern formed on the inner peripheral surface 96A is a pattern that serves as an index of the rotation operation, similarly to the pattern 44 in the above-mentioned first embodiment, and the portions to which the coating 97 is applied are arranged at equal intervals with respect to the circumferential direction R of the zoom ring 95.

[0121] The ring member 96 is formed with a first recessed portion 98. The first recessed portion 98 is a recessed portion that is recessed radially outward from the inner peripheral surface 96A of the ring member 96. The first recessed portion 98 is preferably in a linear shape parallel to the optical axis OA.

[0122] The plating layer 97 is a plating layer applied to the first recess 98. The plating layer 97 is formed by metallizing the electroless plating catalyst by electroless plating treatment, similarly to the plating layer 42 of the first embodiment. The ring member 96 is made of a carbon fiber composite material. The ring member 96 is externally embedded in the lens barrel body 21. The first recess 98 is formed in plurality on the inner peripheral surface 96A of the ring member 96.

[0123] like Fig. 20 As shown, the first recessed portion 98 includes a first surface portion 98A and inclined portions 98B and 98C. The first surface portion 98A is located radially outward of the inner peripheral surface 96A of the ring member 96. Fig. 20 The state before the plating layer 97 is applied to the ring member 96 is shown.

[0124] The inclined portion 98B is inclined with respect to the radial direction V of the ring member 96. Specifically, similarly to the inclined portion 43B in the first embodiment, the inclined portion 98B is inclined inwardly with respect to the radial direction V at an inclination angle α of 5° to 30°.

[0125] The inclined portion 98C, like the inclined portion 98B, is also inclined at an inclination angle α of 5° to 30° inwardly with respect to the radial direction V. The inclined portions 98B and 98C are curved like the inclined portions 43B and 43C in the first embodiment.

[0126] The first recessed portion 98 is formed with second recessed portions 98D and 98E. The second recessed portions 98D and 98E are recessed portions that are recessed radially outwardly relative to the first face portion 98A. The second recessed portions 98D and 98E are formed at both ends of the first face portion 98A in the circumferential direction R. Symbols P1 and P2 indicate positions where the surface including the first face portion 98A intersects with the inclined portions 98B and 98C. The second recessed portions 98D and 98E are formed at positions including the positions P1 and P2. In addition, the present invention is not limited thereto, and only one of the second recessed portions 98D and 98E may be formed at an end portion in the circumferential direction R of the first face portion 98A.

[0127] Also, similarly to the first recess 43 of the first embodiment, the first surface 98A of the first recess 98 is smaller in size than the size in the circumferential direction R of the ring member 96, that is, the size of the inlet portion that contacts the inner circumferential surface 96A of the ring member 96. Fig.19 and Fig. 20 In the illustrated example, the second recessed portions 98D and 98E are groove portions having a rectangular cross section, but may be groove portions having a V-shaped or U-shaped cross section.

[0128] The process of manufacturing the zoom ring 95 is the same as the process of manufacturing the zoom rings 23 and 90 in the first and second embodiments, and the zoom ring 95 is manufactured by the MID process. That is, the plating layer 97 is formed on the first recess 98 of the ring member 96 by performing the processes of injection molding, catalyst deactivation treatment, removal of a portion of the film, first recess formation, catalyst application, and electroless plating. In addition, in this case, in the process of forming the first recess 98, the process of forming the inclined portions 98B, 98C and the second recesses 98D, 98E is also performed. The process of forming the inclined portions 98B, 98C and the second recesses 98D, 98E is the same as the first and second embodiments.

[0129] As described above, in the zoom ring 90, the first recess 98 has the inclined portions 98B and 98C and is formed with the second recesses 98D and 98E which are recessed radially outwardly from the first surface portion 98A of the first recess 98. Thus, the same effect as in the first and second embodiments can be achieved, that is, the accuracy of the plating layer 97 with respect to the first recess 98 can be improved, and a pattern having fine high-reflection portions and low-reflection portions can be formed. Thus, when the zoom ring 95 is rotated, the rotation position of the zoom ring 95 can be detected with high resolution by the sensor 36.

[0130] Furthermore, by forming a pattern on the zoom ring 95 using the plating layer 97 , the same effects as those of the first and second embodiments can be obtained, such as miniaturization of the lens barrel 12 , cost reduction, simplification of processes, and reduction in the number of processes.

[0131] [Fourth embodiment]

[0132] In the above-mentioned embodiments, the surface shape of the plating layer 42, 92, 97 formed in the first recess 43, 93, 98 is not limited. However, in the fourth embodiment described below, the plating layer formed in the first recess is located on the same plane as the inner peripheral surface of the ring member.

[0133] like Fig.21 As shown, the zoom ring 100 in this embodiment includes a ring member 101 and a coating 102. The zoom ring 100 is equivalent to the operating ring in the claims. As in the above-mentioned embodiments, the zoom ring 100 forms a pattern that serves as an indicator of the rotation operation on the inner circumferential surface 101A by applying the coating 102 to the ring member 101. In addition, the zoom ring 100 is the same as the zoom ring 23, 90, 95 of the above-mentioned embodiments except for the surface shape of the coating 102, and the other structures and manufacturing processes are also the same as those of the above-mentioned embodiments, so the description is omitted.

[0134] The ring member 101 is formed with a first recessed portion 103. The first recessed portion 103 is a recessed portion having a first face portion 103A and inclined portions 103B and 103C and being recessed radially outward from the inner peripheral surface 101A, similarly to the first recessed portion 43 in the first embodiment, and has the same shape as the first recessed portion 43. In addition, the shape of the first recessed portion 103 is not limited thereto, and a second recessed portion may be formed similarly to the first recessed portion 93 in the second embodiment, or both an inclined portion and a second recessed portion may be formed similarly to the first recessed portion 98 in the third embodiment. In addition, the plating layer 102 is formed by metallizing an electroless plating catalyst by electroless plating treatment similarly to the plating layers 42, 92, and 97 in the above-mentioned embodiments.

[0135] In this embodiment, the surface of the plating layer 102 and the inner peripheral surface 101A of the ring member 101 are located on the same plane ( Fig.21 Assuming that the electroless plating catalyst and the reducing agent are deposited on the inner circumference of the ring member due to surface tension (the state indicated by the double-dashed line), it is considered that the plating layer becomes a curved surface like a convex lens. In this case, the light from the sensor 36 diffuses on the surface of the plating layer, so it is possible to affect the detection accuracy of the rotational position. In contrast, in the present embodiment, since the surface of the plating layer 102 is set to be on the same plane as the inner circumference 101A of the ring member 101, the light from the sensor 36 will not diffuse. Therefore, the rotational position of the zoom ring 100 can be detected with high resolution by the sensor 36.

[0136] Furthermore, the thickness of the zoom ring 100 can be further reduced, thereby achieving miniaturization and miniaturization of the outer diameter of the lens barrel 12. As a method of setting the surface of the plating layer 102 to be flush with the surface of the ring member 101, an inclined portion is formed in the first recessed portion similarly to the first embodiment and / or a second recessed portion is formed in the first recessed portion similarly to the second embodiment, thereby suppressing the accumulation of the electroless plating catalyst and the reducing agent.

[0137] In each of the above-mentioned embodiments, the hardware structure of the processing unit that executes various processes such as the lens control unit 51 and the camera body control unit 61 is various processors as shown below. The various processors include general-purpose processors that execute software (programs) and function as various processing units, namely CPUs (Central Processing Units), GPUs (Graphical Processing Units), FPGAs (Field Programmable Gate Arrays), etc., processors whose circuit structures can be changed after manufacturing, namely PLDs (Programmable Logic Devices), and processors with circuit structures specially designed to execute various processes, namely dedicated circuits, etc.

[0138] One processing unit may be composed of one of these various processors, or may be composed of a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs or a CPU and an FPGA, or a combination of a CPU and a GPU, etc.). Furthermore, multiple processing units may be composed of one processor. As an example of configuring multiple processing units with one processor, first, there is a method in which, as represented by a computer such as a client or a server, one processor is configured by a combination of one or more CPUs and software, and the processor functions as multiple processing units. Second, there is the following method: as represented by SoC (System On Chip), a processor that uses one IC (Integrated Circuit) chip to implement the functions of the entire system including multiple processing units. In this way, various processing units are configured as a hardware structure using one or more of the above-mentioned various processors.

[0139] Furthermore, more specifically, the hardware structure of these various processors is a circuit in the form of a combination of circuit elements such as semiconductor elements.

[0140] In addition, in the above-mentioned embodiments, an example of an operation ring being applicable to a zoom ring is given, but the present invention is not limited to this, and can also be applied to a focus ring. Furthermore, the lens device involved in the present invention can be applied to lens barrels of smartphones, video cameras, etc. in addition to lens devices of digital cameras.

[0141] Explanation of symbols

[0142] 10-digital camera, 11-camera body, 11A-handle, 12-lens barrel, 13-lens mount, 13A-camera opening, 14-release switch, 16-imaging element, 17-body side signal contact, 21-lens barrel main body, 21A-opening, 22-camera optical system, 22A-filter, 22B-first lens group, 22C-second lens group, 22D-aperture, 22E-third lens group, 22 F-4th lens group, 22G-5th lens group, 22H-aperture opening, 23, 90, 95, 100-zoom ring, 24-focus ring, 25-electric zoom mechanism, 26-focus mechanism, 27-lens mount, 28-lens side signal contact, 29-mounting parts, 31-lens holding frame, 32-guide shaft, 33-lead screw, 33A-screw, 34-motor, 35-zoom slide, 35A-rack gear, 36

[0143] - sensor, 36A-LED (light-emitting diode), 36B, 36C, 36D-light receiving IC (Integrated Circuit), 37-lens holding frame, 38-sensor, 41, 91, 96, 101-ring component, 41A-inner peripheral surface, 41B-outer peripheral surface, 42, 92, 97, 102-plating layer, 43, 93, 98, 103-first concave portion, 43A-first face portion, 43B, 43C-inclined portion, 44-pattern, 51-lens control unit, 52-motor driver, 53-VCM (voice coil motor: voice coil motor) driver, 61-camera body control unit, 62-shutter unit, 63-shutter motor, 64-motor driver, 65-image memory, 66-bus, 67-image data processing unit, 68-display driver, 69-image display unit, 71-card I / F (Interface), 72-memory card, 81-film, 82-laser, 83-electroless plating catalyst, 91A-inner circumference, 93-first concave portion, 93A-first face portion, 93B, 93C -Side, 93D, 93E-second recess, 96A-inner circumferential surface, 98A-first face portion, 98B, 98C-inclined portion, 98D, 98E-second recess, 101A-inner circumferential surface, 103A-first face portion, 103B, 103C-inclined portion, L1, L2-size, OA-optical axis, P-phase, P1, P2-position, R-circumferential, S-space, S11~S15-process, T1, T2-width, V-radial, Vout1, Vout2-two-phase signal, α-tilt angle.

Claims

1. An operating ring, comprising: Ring parts; a first recess formed in the ring member; and A coating is applied to the first recessed portion, The first recessed portion has an inclined portion formed therein.

2. The operating ring according to claim 1, wherein: The first recessed portion is formed in plurality on the inner peripheral surface of the ring member. The plurality of first recessed portions are plated, and a pattern serving as an index for a rotation operation is formed on the inner peripheral surface.

3. The operating ring according to claim 1, wherein: The first recessed portion includes a first surface portion located radially outwardly of an inner peripheral surface of the ring member, and a second recessed portion recessed radially outwardly of the first surface portion.

4. The operating ring according to claim 3, wherein: The second recessed portion is a groove portion formed at an end portion in the circumferential direction of the first surface portion.

5. The operating ring according to claim 3, wherein: The second recessed portions are formed at both end portions of the first surface portion in the circumferential direction.

6. The operating ring according to claim 4, wherein: The second recessed portion includes a position where a surface including the first surface portion intersects with the inclined portion.

7. The operating ring according to claim 1, wherein: The inclined portion is inclined inwardly at an inclination angle of 5° or more and 30° or less with respect to the radial direction.

8. The operating ring according to claim 1, wherein: The inclined portion is in a curved shape.

9. The operating ring according to claim 3, wherein: The first surface portion of the first recess has a smaller dimension than a circumferential dimension of the ring member, that is, a smaller dimension of an inlet portion that contacts an inner peripheral surface of the ring member.

10. The operating ring according to claim 1, wherein: The operating ring is made of carbon fiber composite material.

11. The operating ring according to claim 2, wherein: The pattern includes portions where the plating layer is applied, arranged at equal intervals in a circumferential direction of the operating ring.

12. The operating ring according to claim 11, wherein: The equal intervals are intervals of 0.2 mm or more and 0.3 mm or less. 13 . A lens device comprising the operating ring according to claim 1 , an optical system, and an electric zoom mechanism, wherein the electric zoom mechanism drives a zoom lens group which is a part of the optical system according to the rotation of the operating ring.

14. The lens device according to claim 13, wherein: The optical system at least comprises the zoom lens group, the first lens group, a filter and an aperture. The maximum outer diameter of the filter is larger than the maximum outer diameter of the first lens group and is located closer to the subject than the first lens group. The zoom lens group is located between the first lens group and the aperture and is located closer to the subject than the aperture. The pattern is located between the maximum outer diameter portion of the first lens group and the maximum outer diameter portion of the filter.

15. An operating ring, comprising: Ring parts; a first recess formed in the ring member; and A coating is applied to the first recessed portion, The inner peripheral surface of the ring member is located on the same plane as the plating layer.

16. The operating ring according to claim 15, wherein: The first recessed portion is formed in plurality on the inner peripheral surface of the ring member. The plurality of first recessed portions are plated, and a pattern serving as an index for a rotation operation is formed on the inner peripheral surface.

17. A method for manufacturing an operating ring, comprising: forming a first recessed portion on the ring member; forming an inclined portion in the first recess; and A step of plating the first recessed portion.

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