JP2020013030A - Lens device having operation ring and imaging device, and control method and program for lens device - Google Patents

Abstract

To provide a lens device capable of reducing drive irregularity of a driven body when rotationally operating an operation ring having a click groove.SOLUTION: A lens device (200) includes: a fixing member (215) which has one of click feeling generation means (18) and a click groove (12); an operation ring (212) which has the other one of the click feeling generation means and the click groove, and which is rotatable with respect to the fixing member in a circumferential direction; rotation detection means (214) for detecting rotation speed of the operation ring; control means (206) for controlling a driven body driven by rotation operation of the operation ring. The control means controls the driven body on the basis of average rotation speed of the operation ring which is calculated by using the rotation speed of the operation ring.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a lens device having an operation ring and an imaging device.

  Patent Literature 1 discloses an imaging apparatus that adjusts a shutter speed and an ISO sensitivity by using an operation ring that can be rotated with respect to a lens barrel. The imaging device disclosed in Patent Literature 1 has a click mechanism that generates a click feeling according to a rotation operation of an operation ring.

Japanese Patent No. 5586895

  By the way, in the imaging device disclosed in Patent Document 1, there is no problem when the shutter speed and the ISO sensitivity are changed stepwise by performing an intermittent rotation operation of the operation ring for each click. However, in a shooting scene in which a driven body such as an aperture or a focus lens is moved to an intended position by rotating the operation ring, such as when changing an exposure value or changing a focus position, the rotation speed of the operation ring due to click torque is used. Affected by fluctuations. When the rotation speed of the operation ring fluctuates due to the click torque, the rotation detection pulse of the operation ring increases or decreases with time, and driving unevenness of the driven body occurs.

  Therefore, the present invention provides a lens device, an imaging device, a control method of a lens device, and a program that can reduce driving unevenness of a driven body when rotating an operation ring having a click groove. With the goal.

  A lens device as one aspect of the present invention includes a fixing member having one of a click feeling generating means and a click groove, and a fixing member having the other of the click feeling generating means and the click groove, and having An operation ring rotatable in a direction, rotation detection means for detecting a rotation speed of the operation ring, and control means for controlling a driven body driven by a rotation operation of the operation ring, wherein the control means And controlling the driven body based on an average rotation speed of the operation ring calculated using the rotation speed of the operation ring.

  An imaging device as another aspect of the present invention includes the lens device, an imaging device that photoelectrically converts an optical image formed via the lens device, and a camera body that holds the imaging device.

  According to another aspect of the present invention, there is provided a method of controlling a lens device, comprising: transmitting the rotation speed of the operation ring detected by the rotation detection unit; and calculating the rotation speed of the operation ring by using the rotation speed. Receiving an average rotation speed of the operation ring; and controlling a driven body based on the average rotation speed.

  A program according to another aspect of the present invention causes a computer to execute the control method.

  Other objects and features of the present invention are described in the following examples.

  According to the present invention, it is possible to provide a lens device, an imaging device, a control method of a lens device, and a program capable of reducing driving unevenness of a driven body when rotating an operation ring having a click groove. be able to.

It is explanatory drawing of the click mechanism in this embodiment, a click detection means, and a rotation detection means. FIG. 4 is an explanatory diagram of a click detection signal and a rotation detection signal in the embodiment. It is a block diagram of an imaging device in this embodiment. FIG. 4 is an explanatory diagram of a rotation speed fluctuation of an operation ring due to a click torque in the embodiment. FIG. 4 is an explanatory diagram of a control method of the imaging device according to the embodiment. 4 is a flowchart illustrating a control method of the imaging device according to the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  First, an imaging device (optical device) according to the present embodiment will be described with reference to FIG. FIG. 3 is a block diagram of the imaging apparatus (interchangeable-lens single-lens reflex camera) 1. The imaging apparatus 1 includes a camera body (imaging apparatus body) 100 and an interchangeable lens (lens apparatus) 200 that is detachable from the camera body 100. However, the present invention is not limited to this, and is also applicable to an imaging device (a lens-integrated camera) in which an imaging device main body and a lens device are integrally configured.

  In the interchangeable lens 200, 201 is a first lens unit, 202 is a variable power lens unit, 203 is a focus lens unit, and 204 is a diaphragm mechanism. The first lens unit 201, the variable power lens unit 202, and the focus lens unit 203 each include a lens and a lens holding frame (not shown) for holding the lens. In the present embodiment, the first lens unit 201, the variable power lens unit 202, the focus lens unit 203, and the aperture mechanism 204 constitute an imaging optical system.

  The lens CPU 206 transmits and receives various information via the camera CPU 106 and the lens communication unit 208 and the camera communication unit 108, and controls the entire operation of the interchangeable lens 200 integrally with the camera CPU 106. The lens CPU 206 controls the aperture driving unit 205. Specifically, the lens CPU 206 controls the driving direction of the diaphragm driving unit 205 by changing the polarity of the diaphragm driving signal applied to the diaphragm driving unit 205, and increases or decreases the number of pulses of the diaphragm driving signal to change the driving direction of the diaphragm driving unit 205. 205 is controlled. Thus, the lens CPU 206 can control the opening / closing operation amounts of the plurality of aperture blades in the aperture mechanism 204.

  Reference numeral 210 denotes a shooting mode switching unit operated by a user to switch between a still image shooting mode and a moving image shooting mode. In the present embodiment, the shooting mode switching unit 210 is provided in the interchangeable lens 200, but may be provided in the camera body 100. The storage unit 211 includes a ROM or the like, and stores data of a drive pulse of the focus lens unit 203 and a drive pulse of the aperture mechanism 204. The lens CPU 206 can read out each data stored in the storage unit 211 at any time.

  The operation ring 212 is supported rotatably in the circumferential direction with respect to the lens barrel (fixed member) 215 of the interchangeable lens 200, and has a click mechanism described later. The mode change dial unit 115 is arranged on the camera body 100 and can change (switch) a mode such as an aperture value (F value), a shutter speed, an ISO sensitivity, an exposure value, and a manual focus mode. When the operation ring 212 is rotated after the mode is changed, setting of an aperture value, a shutter speed, an ISO sensitivity, an exposure value, or a focus position in a manual focus mode is performed based on a click detection signal detected by the click detection unit 213. The value can be changed. The rotation detecting unit 214 detects rotation detection information (rotation information such as a rotation amount, a rotation direction, or a rotation speed) of the operation ring 212.

  Here, the click mechanism of the operation ring 212, the click detection means 213, the rotation detection means 214, the click detection signal, and the rotation detection signal will be described with reference to FIGS. FIG. 1 is an explanatory diagram of the click mechanism, the click detection unit 213, and the rotation detection unit 214. FIG. 2 is an explanatory diagram of the click detection signal and the rotation detection signal.

  First, the click mechanism will be described. The upper part of FIG. 1 is a view in which the click grooves 12 arranged on the operation ring 212 and arranged at equal intervals on an annular member (not shown) are developed on a plane. The click groove 12 has, in a plane orthogonal to the optical axis OA (in a plane orthogonal to the optical axis), flat portions 12a and groove portions 12b that are alternately arranged at equal intervals in the circumferential direction. The groove 12b is used as a click groove. In FIG. 1, Wf is the circumferential width of the flat portion 12a, and Wg is the circumferential width of the groove 12b. In the present embodiment, the click groove 12 may have a through portion having no bottom, instead of the groove 12b.

  The click feeling generating means 18 has a shaft member 10 and a spring (biasing member) 11. The shaft member 10 is provided on the lens barrel (fixing member) 215 of the interchangeable lens 200 so as to face the click groove 12 in parallel with the optical axis OA (in the optical axis direction). The tip of the shaft member 10 has a curved shape such as an R shape. The spring 11 urges the shaft member 10 in a direction toward the click groove 12 (optical axis direction). The shaft member 10 is arranged in a state where it is urged by a spring 11 in a direction toward the click groove 12. As described above, the click feeling generating means 18 is configured to generate a click feeling according to the rotation of the operation ring 212 in a state of being urged in the optical axis direction and in contact with the click groove 12. That is, a click feeling is generated by rotating the operation ring 212 while the spring 11 urges the shaft member 10 toward the click groove 12.

  When the operation ring 212 is rotated, an annular member (not shown) rotates integrally with the operation ring 212, and the shaft member 10 of the click feeling generating means 18 slides on the surface of the flat portion 12a. Is engaged with the groove 12b, so that a click feeling is generated. In the present embodiment, a desired click feeling can be obtained by adjusting the shape of the groove 12b or adjusting the urging force of the spring 11. In the present embodiment, the shaft member 10 is an integrally formed shaft member having a rounded tip, but is not limited thereto. If the tip is a curved surface such as an R shape, the same effect can be obtained even if the tip is formed of two parts, for example, a ball member and a shaft member.

  Here, the reason why the click mechanism is necessary will be described. As described above, the click mechanism is used to change the setting of the imaging condition in each mode selected by the mode change dial unit 115 each time the user clicks. For example, in the case of an operation ring having no click feeling, there is no mechanism for retaining the operation ring at a predetermined position. As a result, the operation ring can be easily rotated, but it is easy to rotate carelessly, so that it is difficult to align the operation ring to an intended position. For this reason, a mechanism that does not inadvertently rotate the operation ring, such as a click mechanism, is preferable as means for adjusting the position of the operation ring to the intended set value in the setting change of the shooting conditions in each of the above-described modes. Become.

  Next, the click detecting means 213 will be described. The middle part of FIG. 1 is a view in which the light-shielding plate 13 for click detection, which is disposed on the operation ring 212 and disposed on the annular member (not shown) and protrudes inward in the radial direction, is linearly developed. The click detecting means 213 includes a light shielding plate (first light shielding plate) 13 and a photo interrupter (first position detection element) 15 mounted on a flexible printed circuit board (first flexible printed circuit board) 31. . The light blocking plate 13 is provided on the operation ring 212, and the photo interrupter 15 is provided on a lens barrel (fixing member) 215.

  With such a configuration, the click detection unit 213 detects contact position information between the click feeling generation unit 18 and the click groove 12. The click detecting means 213 rotates integrally with the operation ring 212 with respect to the photo interrupter 15 attached to the lens barrel 215, and passes the light shielding portions 13a arranged at equal intervals in the circumferential direction. The click detection signal 25 is output.

  In FIG. 1, Wp is the circumferential width of the light shielding portion (first light shielding portion) 13a of the light shielding plate 13, Wq is the circumferential width (opening width) without the light shielding portion 13a, and Pr is the width Wp of the light shielding portion 13a. And the width (opening width) Wq. The light shielding plate 13 is used for detecting that the shaft member 10 is located in the flat surface portion 12a or the groove portion 12b. When the light-shielding plate 13 is provided on the operation ring 212, the light-shielding portion 13a is assembled such that the circumferential center of the groove portion 12b and the circumferential center of the width Wp of the light-shielding portion 13a substantially coincide with each other.

  The photo interrupter 15 is a click detection element (first position detection element). The photo interrupters 15 are arranged on a pitch circle passing through the center in the thickness direction of the light shielding plate 13 of the annular member (not shown) when viewed in the optical axis direction. The photo interrupter 15 outputs the click detection signal 25 shown in the upper part of FIG. 2 when the light shielding plate 13 passes through the slit of the photo interrupter 15 (between the broken lines in FIG. 1). The photo interrupter 15 outputs a Lo signal when the light blocking plate 13 passes through the slit of the photo interrupter 15 and is shielded, and outputs a Lo signal, and is not blocked by the light blocking plate 13 without passing through the slit of the photo interrupter 15. Outputs Hi signal.

  In the present embodiment, the width Wg of the groove 12b and the width Wp of the light shielding plate 13 are preferably set to be different from each other (Wg ≠ Wp, that is, set such that Wg> Wp or Wg <Wp). . With such a configuration, it is possible to make the click feeling generation timing based on the operation of the operation ring 212 coincide with the detection timing by the click detection unit 213. Further, when the interchangeable lens 200 is replaced with another interchangeable lens, the deviation tendency between the click feeling generation timing and the detection timing due to the tolerance (which is the earlier of the click feeling generation timing and the detection timing) can be matched. . In the present embodiment, the width Wg is set to be larger than the width Wp (so that Wg <Wp).

  Thus, when the operation ring 212 is rotated, the annular member (not shown) rotates integrally with the operation ring 212, and the click detection signal 25 is always Lo when the shaft member 10 is engaged with the groove 12b. The circuit is designed so that In the present embodiment, when the click detection signal 25 is Lo, it is recognized that the shaft member 10 is engaged with the groove 12b, and a command to start setting change in each mode selected by the mode change dial means 115 is issued. Has become. In the present embodiment, the photo interrupter 15 is used as the click detection element. However, the same effect can be obtained with a photo reflector or a magnetic detection element.

Next, the rotation detecting means 214 will be described. The lower part of FIG. 1 shows a linearly developed light-shielding plate 14 arranged on the operation ring 212 and arranged on an annular member (not shown) and protruding radially inward. The rotation detecting means 214 includes a light shielding plate (second light shielding plate) 14, a photo interrupter (second position detecting element) 16 mounted on a flexible printed board (second flexible printed board) 32, and a photo interrupter. (Third position detecting element) 17. The light shielding plate 14 is provided on the operation ring 212, and the photo interrupters 16 and 17 are provided on a lens barrel (fixing member) 215. The rotation detecting unit 214 rotates integrally with the operation ring 212 with respect to the photointerrupters 16 and 17 attached to the lens barrel 215, and is disposed at equal intervals in the circumferential direction (second light-shielding unit). 1), the rotation detection signals 26 and 27 are output when 14a passes. In FIG. 1, Ws is the circumferential width of the light shielding portion 14a of the light shielding plate 14, and Wt is the circumferential width of the light shielding portion 14a without the opening (opening width). ), Pu is a width (pitch) obtained by adding the width Ws and the width (opening width) Wt of the light shielding portion 14a. The light-shielding plate 14 is used to detect the rotation amount and the rotation direction of the operation ring 212. The photo interrupters 16 and 17 are rotation detecting elements (a second position detecting element and a third position detecting element). The photo interrupters 16 and 17 are arranged on a pitch circle passing through the center of the light shielding plate 14 in the thickness direction of the annular member (not shown) in the optical axis direction.

  When the light shielding plate 14 passes through the slits of the photo interrupters 16 and 17 (between the broken lines in FIG. 1), the rotation detection signals 26 and 27 in the middle and lower stages of FIG. 2 are output. The photo interrupters 16 and 17 output the Lo signal by passing the slits of the photo interrupters 16 and 17 through the light shielding plate 14 and blocking the light, and do not pass light through the slits of the photo interrupters 16 and 17 without passing the light shielding plate 14. Then, a Hi signal is output. The photo interrupters 16 and 17 are arranged so that the rotation detection signals 26 and 27 deviate from each other by １ ／ period when the period of Hi and Lo of the rotation detection signal 26 is one cycle in total.

  The shapes of the light shielding plates 13 and 14 are set such that the rotation detection signals 26 and 27 output more Hi / Lo signal changes (cycles) than the click detection signal 25. That is, the cycle of the rotation detection signals 26 and 27 is shorter than the click detection signal 25 (satisfies the relationship of Pu <Pr). The lens CPU 206 receives the rotation detection signals 26 and 27 from the rotation detection means 214, and calculates the rotation amount and the rotation direction of four pulses per cycle based on the rotation detection signals 26 and 27. In this embodiment, a photo interrupter is used as the rotation detecting element. However, a photoreflector or a magnetic detecting element can be used in place of the same because similar effects can be obtained.

  In this embodiment, the rotation amount of 12 pulses is output until the click detection signal 25 switches from Lo to Hi and then switches from Lo to Hi. Thus, when the operation ring 212 is rotated, it is possible to secure a large amount of rotation per space of the place where the click feeling is obtained (the groove portion 12b of the click groove 12). Since a large amount of rotation can be ensured, the user can obtain an operation feeling closer to the intention of operating the operation ring 212 when changing the aperture value or acquiring the focus position in the manual focus mode.

  Here, with reference to FIGS. 1 and 2, a method for more accurately detecting a state in which the shaft member 10 is engaged with the groove 12 b of the click groove 12 will be described. FIG. 1 shows a state in which the shaft member 10 is engaged with a groove portion 12b located on the leftmost side of the click groove 12. At this time, focusing on the signal switching of the click detection signal 25 from left to right in FIG. 2, there is an engagement timing of the shaft member 10 after switching from Hi to Lo. Conversely, focusing on the signal switching of the click detection signal 25 from right to left in FIG. 2, there is an engagement timing of the shaft member 10 after switching from Hi to Lo. That is, the click detection signal 25 is switched from Hi to Lo on both sides of the engagement timing of the shaft member 10.

  Therefore, starting from the signal switching for each rotation direction, the pulses calculated by the rotation detection signals 26 and 27 until the shaft member 10 engages with the groove 12b are measured. Then, the measured pulse is stored in the storage means 211 of the interchangeable lens 200, and the position where the pulse calculated based on the rotation detection signals 26 and 27 from the signal switching is counted is associated with the engagement timing of the shaft member 10. That is, the storage unit 211 stores, for each rotation direction, rotation amount information from when the click detection signal is switched to when the click feeling generating unit 18 enters the groove 12 b of the click groove 12. Then, based on the rotation amount information, the lens CPU 206 outputs click detection information at a timing when the click feeling generating unit 18 enters the groove 12b. Thus, it becomes possible to simultaneously issue the shaft member 10 with the groove portion 12b of the click groove 12 and to issue a setting change start command in each mode selected by the mode change dial means 115, thereby improving operability. it can.

  Next, the rotation speed fluctuation of the operation ring 212 due to the click torque will be described. Here, in the case of the operation ring 212 having the click mechanism in the present embodiment, in the case of changing the exposure value by driving the aperture, changing the focus position by driving the focus, or the like, moving the lens to the intended position by rotating operation Think of the scene. In the photographing scene at this time, the click torque of the click mechanism causes an influence due to the rotation speed fluctuation of the operation ring 212. Hereinafter, this effect will be described with reference to FIG.

  FIG. 4 is an explanatory diagram of the rotation speed fluctuation of the operation ring 212 generated by the click torque. There are two differences from FIG. The first point is the behavior of the operation ring 212 when the shaft member 10 slides on the plane of the flat portion 12a with respect to the click groove 12 or engages with the groove portion 12b, and the time t and the vertical axis are plotted on the horizontal axis. The point is that a graph shown as the rotation speed v of the operation ring 212 is added to the axis. In the graph in FIG. 4, it can be seen that the rotation speed v of the operation ring 212 largely fluctuates before and after the shaft member 10 engages with the click groove 12. This behavior occurs with the operation ring 212 having a general click mechanism.

  The second point is a point where the rotation detection signals 26 and 27 are affected by the fluctuation of the rotation speed v of the operation ring 212, and a state where a temporal increase or decrease occurs is reproduced (the rotation detection signals 26 'and 27'). ). At the same time as the rotation speed v of the operation ring 212 in the graph increases, the temporal switching period of the rotation detection signals 26 'and 27' decreases. On the other hand, at the same time as the rotation speed v of the operation ring 212 decreases, the temporal switching cycle of the rotation detection signals 26 'and 27' increases. Further, while the shaft member 10 is sliding on the surface of the flat portion 12a, the rotation speed v of the operation ring 212 is substantially constant, and thus the temporal switching cycle of the rotation detection signals 26 'and 27' is also substantially equal. It is constant. As described above, it is difficult to realize the rotation operation while the rotation speed v of the operation ring 212 having the click mechanism is kept constant. For this reason, if lens drive or aperture drive is performed based on the rotation detection signals 26 ', 27', drive unevenness occurs (stable lens drive or aperture drive cannot be performed).

  Thus, in the present embodiment, even when a rotation operation is performed using the operation ring 212 having a click mechanism, lens driving and aperture driving with reduced driving unevenness are realized. Next, a specific method thereof will be described with reference to FIGS.

  FIG. 5 is an explanatory diagram of a control method (a driving method) of the imaging device 1. FIG. 5A shows a relationship between the behavior of the rotation speed v with respect to the time t of the operation ring 212 and the rotation detection signals 26 'and 27' at that time extracted from FIG. 4 and a predetermined time. In the present embodiment, the times T1, T2, T3, T4, and T5 are set as the predetermined times. The predetermined times are all set to the same time (constant time), for example, 1 second, 1/30 second, 1/60 second, etc., but are not limited thereto. In this embodiment, when each mode is selected by the mode change dial unit 115 of the camera body 100, the camera CPU 106 requests the click detection information and the rotation detection information of the interchangeable lens 200 from the lens CPU 206 for a predetermined time. Time interval. However, the present invention is not limited to this.

  FIG. 6 is a flowchart illustrating a control method (driving method) of the image pickup apparatus 1, and realizes lens driving and aperture driving that reduce driving unevenness when a rotating operation is performed using the operation ring 212 having a click mechanism. It is a flowchart for performing. Each step in FIG. 6 is mainly executed based on a command from the camera CPU 106 or the lens CPU 206.

  First, in step S101, the user starts operating the camera body 100. Subsequently, in step S102, the user selects each mode using the mode change dial unit 115 of the camera body 100. In the present embodiment, a case where the manual focus mode or the exposure value mode is selected by the mode change dial unit 115 will be described.

  Subsequently, in step S103, the camera CPU 106 sets a predetermined time (predetermined time interval) Tn (n is an integer). The camera CPU 106 requests the click detection information and the rotation detection information of the interchangeable lens 200 from the lens CPU 206 at intervals of a predetermined time Tn. The rotation detection information is information on the rotation amount and the rotation direction of the operation ring 212. In the present embodiment, the predetermined time Tn is set to one second. Subsequently, in step S104, the lens CPU 206 reads out the click detection information and the rotation detection information of the interchangeable lens 200 requested by the camera CPU 106. Then, the lens CPU 206 transmits the click detection information and the rotation detection information to the camera CPU 106 via the lens communication unit 208 and the camera communication unit 108.

  Subsequently, in step S105, based on the rotation detection information (the rotation amount information obtained from the rotation detection signals 26 and 27) received from the lens CPU 206, the camera CPU 106 averages the driving speed per predetermined time (the average rotation of the operation ring 212). Speed). In the present embodiment, the rotation amount per predetermined time T1 to T5 in FIG. In the present embodiment, since the predetermined time Tn is set to one second, a driving speed of eight pulses per second can be obtained. The camera CPU 106 stores speed information corresponding to one pulse of the rotation amount, and determines the calculated speed (average driving speed) as a driving speed for driving the lens or the diaphragm.

  Subsequently, in step S106, the camera CPU 106 transmits the drive speed (average drive speed) determined in step S105 and rotation detection information (rotation amount and rotation direction) to the lens CPU 206. Subsequently, in step S107, the lens CPU 206 updates drive information for driving the focus lens unit 203 or the aperture mechanism 204 as information to be transmitted to the focus drive unit 209 or the aperture drive unit 205. Then, the lens CPU 206 transmits the updated driving information to the focus driving unit 209 or the aperture driving unit 205. Subsequently, in step S108, the focus driving unit 209 or the aperture driving unit 205 drives the focus lens unit 203 or the aperture mechanism 204 based on the driving information received from the lens CPU 206.

  Subsequently, in step S109, while the focus driving unit 209 or the aperture driving unit 205 is driving the focus lens unit 203 or the aperture mechanism 204, the lens CPU 206 determines whether new driving information has been received from the camera CPU 106. I do. That is, the lens CPU 206 determines whether or not a new click detection signal has been output from the click detection unit 213 while the focus lens unit 203 or the aperture mechanism 204 is being driven. When the lens CPU 206 receives new drive information, the process returns to step S107. In step S107, the lens CPU 206 updates drive information for driving the focus lens unit 203 or the aperture mechanism 204, and transmits the information to the focus drive unit 209 or the aperture drive unit 205.

  For example, when the focus lens unit 203 or the aperture mechanism 204 is currently driven at a low speed, the operation ring 212 is quickly rotated to calculate a faster drive speed. In such a case, by driving the focus lens unit 203 or the aperture mechanism 204 with the latest drive information as needed, the operation feeling by the rotation operation of the operation ring 212 can be improved.

  On the other hand, if the lens CPU 206 does not receive new drive information from the camera CPU 106 while the focus lens unit 203 or the aperture mechanism 204 is being driven by the focus drive unit 209 or the aperture drive unit 205 in step S109, the process proceeds to step S110. In step S110, the driving of the focus lens unit 203 or the diaphragm mechanism 204 ends.

  As described above, in the present embodiment, the lens CPU (control means) 206 controls the driven body (the focus lens unit 203 or the aperture mechanism 204) by rotating the operation ring 212. More specifically, the lens CPU 206 calculates the average rotation speed of the operation ring 212 (average drive speed of the driven body) calculated using the rotation speed of the operation ring 212 detected by the rotation detection unit 214. Control the driven body. In the present embodiment, the driven body is the focus lens unit 203 or the diaphragm mechanism 204, but the present invention is not limited to these, and can be applied to other members.

  At a predetermined time T1 in FIG. 5A, the rotation speed of the operation ring 212 fluctuates, and a difference occurs in the temporal switching of the rotation detection signals 26 'and 27'. On the other hand, according to the present embodiment, the driving unevenness can be reduced by calculating the average driving speed per predetermined time and driving the focus lens unit 203 or the aperture mechanism 204. FIG. 5B is a diagram illustrating a state in which the rotation speed fluctuation of the operation ring 212 due to the click torque is reduced and the difference between the time detections of the rotation detection signals 26 and 27 is reduced in the predetermined times T1 to T5. . The upper part of FIG. 5B is a schematic diagram in which the behavior of the operation ring 212 is reproduced based on the temporal change of the rotation detection signals 26 and 27. The solid line indicates the behavior of the operation ring 212 based on the rotation detection signals 26 and 27, and the dashed line indicates the behavior of the operation ring 212 based on the rotation detection signals 26 'and 27'.

  In the present embodiment, the rotation amount of 12 pulses is set to be output in response to the switching of the click detection signal 25. However, the present invention is not limited to this. With the configuration, more detection pulses can be output. In the present embodiment, when the click detection signal 25 switches from Hi to Lo, the click detection means 213 transmits the click detection signal 25 to the lens CPU 206. The timing of transmitting the click detection signal 25 from the click detection unit 213 to the lens CPU 206 may be when the click detection signal 25 switches from Lo to Hi by changing the circuit design.

  The rotation detection means 214 transmits rotation detection signals 26 and 27 when the operation ring 212 is rotated to the lens CPU 206. At the timing when the click detection signal 25 from the click detection means 213 is received, the lens CPU 206 determines the amount of rotation of the rotation detection signals 26 and 27 received from the rotation detection means 214 from the timing when the click detection signal 25 was previously received. Calculate the rotation direction.

  In FIG. 3, when the operation ring 212 is rotated, the lens CPU 206 sends click detection information (click detection signal) and rotation detection information (rotation amount and rotation amount) to the camera CPU 106 via the lens communication unit 208 and the camera communication unit 108. And the direction of rotation). For example, when changing the aperture value or acquiring the focus position in the manual focus mode, the camera CPU 106 provides the lens CPU 206 with the click detection information of the operation ring 212 and the operation information such as the rotation pulse amount and the rotation direction (operation of the operation ring 212). Information). The camera CPU 106 calculates drive information of the aperture drive unit 205 and the focus drive unit 209 of the interchangeable lens 200 based on operation information from the lens CPU 206. Thereafter, the camera CPU 106 transmits drive information of the aperture drive unit 205 and the focus drive unit 209 to the lens CPU 206 based on the mode information set by the mode change dial unit 115. The lens CPU 206 controls the aperture driving unit 205 and the focus driving unit 209 based on the driving information to drive the aperture mechanism 204 and the focus lens unit 203. Then, the camera CPU 106 updates the setting value information displayed on the display unit 112.

  As shown in FIG. 1, click detection means 213 having light-shielding plate 13 and photo-interrupter 15 and rotation detection means 214 having light-shielding plate 14 and photo-interrupters 16 and 17 are arranged along the optical axis direction. I have. With such an arrangement, the size of the interchangeable lens 200 in the radial direction can be reduced. Therefore, according to the present embodiment, it is possible to secure a large amount of rotation while suppressing the size of the interchangeable lens 200 in the radial direction.

  Further, when the photo interrupters 15, 16, 17 are arranged so as to overlap with each other in the optical axis direction, the flexible printed boards 31, 32 interfere with each other, and it is difficult to reduce the size of the interchangeable lens 200 in the optical axis direction. There is. Therefore, in the present embodiment, as shown in FIG. 1, the photo interrupter 15 of the click detecting means 213 and the photo interrupters 16 and 17 of the rotation detecting means 214 are arranged so as not to overlap each other in the optical axis direction. That is, the photointerrupters 15, 16, and 17 are arranged at different positions (phases) in the circumferential direction. Preferably, the flexible printed boards 31 and 32 are arranged so as not to overlap with each other in the optical axis direction. Thus, the photointerrupters 15, 16, 17 can be arranged without interfering with the mounting space on the flexible printed circuit boards 31, 32 and the space required for mounting the interchangeable lens 200 on components. Therefore, the size of the interchangeable lens 200 in the full length direction (optical axis direction) can be further reduced.

  As shown in FIG. 3, light from the subject 300 passes through the imaging optical system in the interchangeable lens 200 and enters the camera body 100. When the quick return mirror 101 of the camera body 100 is retracted from the optical path, light from the subject 300 reaches the imaging surface of the imaging unit 102. The imaging unit 102 has a photoelectric conversion element (imaging element) such as a CCD sensor or a CMOS sensor, and photoelectrically converts a subject image (optical image) formed via an imaging optical system. On the other hand, when the quick return mirror 101 is arranged in the optical path, light from the subject 300 is reflected by the quick return mirror 101 and guided to the pentaprism 103. The light reflected by the pentaprism 103 passes through the finder optical system 104 and is guided to the user's eyes. Thereby, the user can visually recognize the subject image.

  The quick return mirror control means (QR mirror control means) 105 controls the up / down operation of the quick return mirror 101 based on a control signal from the camera CPU 106. The photometry detection unit 107 calculates subject brightness from an output signal of the imaging unit 102 or a video signal generated by an image processing circuit (not shown), which is described later, and outputs this to the camera CPU 106 as photometry information. The focus detection unit 109 detects the focus state of the imaging optical system by a phase difference detection method using light reflected by a submirror (not shown) provided behind the quick return mirror 101 in the still image shooting mode. Then, the focus detection unit 109 outputs focus information indicating the focus state to the camera CPU 106. The camera CPU 106 controls the position of the focus lens unit 203 via the focus driving unit 209 based on the focus information to obtain a focused state.

  Further, in the moving image shooting mode, the camera CPU 106 generates contrast information indicating a contrast state of a video from a video signal generated by an image processing circuit described later. The camera CPU 106 controls the position of the focus lens unit 203 based on the contrast information to obtain a focused state. Further, the camera CPU 106 controls an aperture value to be set by the aperture mechanism 204 and an exposure amount of the imaging unit 102 in the still image shooting mode by an exposure control unit (not shown) based on the photometric information. Calculate the operating speed.

  The release switch unit 110 outputs a SW1 signal when a half-press operation (SW1_ON) is performed by the user, and outputs a SW2 signal when a full-press operation (SW2_ON) is performed. The camera CPU 106 starts a still image shooting preparation operation such as photometry and focus detection in response to the input of the SW1 signal, and starts a shooting operation of a still image for recording in response to the input of the SW2 signal. The moving image shooting switch unit 111 alternately outputs a moving image shooting start signal and a moving image shooting stop signal each time the user operates the moving image shooting switch unit 111. The camera CPU 106 starts the shooting operation of the moving image for recording in response to the input of the moving image shooting start signal, and stops the shooting operation in response to the input of the moving image shooting stop signal. In the present embodiment, the moving image photographing switch unit 111 is provided separately from the release switch unit 110, but the release switch unit 110 may also serve as the moving image photographing switch unit 111.

  The image processing circuit generates a digital video signal by performing amplification and various image processing on the image pickup signal output from the image pickup unit 102. The camera CPU 106 generates a recording still image, a display moving image, and a recording moving image using the digital video signal. The display moving image is displayed as an electronic viewfinder image on a display unit 112 including a display element such as an LCD panel. The recording device 113 records a recording still image and a recording moving image on a recording medium such as a semiconductor memory. The power supply 114 supplies power to each unit of the camera body 100.

  As described above, in the present embodiment, the control unit (the lens CPU 206) controls the driven body based on the average rotation speed of the operation ring 212 calculated using the rotation speed of the operation ring 212. Preferably, the average rotation speed is an average rotation speed per predetermined time calculated based on the rotation speed of the operation ring obtained in a predetermined time. Also preferably, the lens device is detachable from the camera main body, and the control means transmits the rotation speed of the operation ring to the camera main body in response to a request from the camera main body, and the average rotation calculated by the camera main body. The speed is received, and the driven body is controlled based on the average rotation speed.

(Other embodiments)
The present invention supplies a program for realizing one or more functions of the above-described embodiments to a system or an apparatus via a network or a storage medium, and one or more processors in a computer of the system or the apparatus read and execute the program. This processing can be realized. Further, it can also be realized by a circuit (for example, an ASIC) that realizes one or more functions.

  According to the present embodiment, a lens device, an imaging device, a control method of a lens device, and a program capable of reducing driving unevenness of a driven body when rotating an operation ring having a click groove are provided. can do.

  As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist.

  In the present embodiment, the click feeling generating means 18 is provided on the lens barrel (fixing member) 215 and the click groove 12 is provided on the operation ring 212. Conversely, the click feeling generating means is provided on the operation ring and the click groove 12 is provided. May be provided on the lens barrel (fixing member) 215. That is, the lens barrel 215 has one of the click feeling generating means 18 and the click groove 12, and the operation ring 212 has the other of the click feeling generating means and the click groove 12. Further, in the present embodiment, the imaging device (lens device) provided with the operation ring having the click groove has been described, but the present invention is not limited to this, and can be applied to optical devices other than the imaging device. is there.

12 Click groove 18 Click feeling generating means 200 Interchangeable lens (lens device)
206 lens CPU (control means)
212 Operation ring 214 Rotation detecting means 215 Lens tube (fixed member)

Claims (10)

A fixing member having one of a click feeling generating means and a click groove,
An operation ring having the other of the click feeling generating means and the click groove, and rotatable in a circumferential direction with respect to the fixing member;
Rotation detection means for detecting the rotation speed of the operation ring,
Control means for controlling a driven body driven by the rotation operation of the operation ring,
The lens device, wherein the control means controls the driven body based on an average rotation speed of the operation ring calculated using the rotation speed of the operation ring. The click groove has a plane portion and a groove portion provided alternately,
The click feeling generating means is configured to generate a click feeling according to the rotation of the operation ring in a state of being urged in the optical axis direction and contacting the click groove. 2. The lens device according to 1. 3. The lens device according to claim 1, wherein the average rotation speed is an average rotation speed per the predetermined time calculated based on the rotation speed of the operation ring acquired at a predetermined time. 4. . The lens device is detachable from a camera body,
The control means includes:
Transmitting the rotation speed of the operation ring to the camera body in response to a request from the camera body;
Receiving the average rotation speed calculated by the camera body,
The lens device according to claim 1, wherein the driven body is controlled based on the average rotation speed. The lens device according to claim 1, further comprising a click detection unit configured to detect contact position information between the click feeling generation unit and the click groove. The control means, when a new click detection signal is output from the click detection means while the driven body is being driven, based on the average rotation speed updated in accordance with the new click detection signal. The lens device according to claim 5, wherein the driving device is controlled. Further comprising storage means for storing, for each rotation direction, rotation amount information from the signal switching of the click detection signal output from the click detection means to the click feeling generating means entering the groove of the click groove,
The lens device according to claim 5, wherein the control unit outputs click detection information at a timing when the click feeling generating unit enters the groove based on the rotation amount information. A lens device according to any one of claims 1 to 7,
An image sensor that photoelectrically converts an optical image formed through the lens device,
An imaging apparatus, comprising: a camera body that holds the imaging element. A fixing member having one of the click feeling generating means and the click groove, an operation ring having the other of the click feeling generating means and the click groove, and being rotatable in the circumferential direction with respect to the fixing member; A rotation detecting means for detecting a rotation speed of the ring,
Transmitting the rotation speed of the operation ring detected by the rotation detection unit;
Receiving an average rotation speed of the operation ring calculated using the rotation speed of the operation ring;
Controlling the driven body based on the average rotation speed.   A program for causing a computer to execute the control method according to claim 9.