Lens driving device and optical apparatus

Abstract

To smoothly drive an optical element near a machine end.SOLUTION: A driving device 2 is removably attached to an optical apparatus 1 having a movable optical element 107. The driving device has driving means 203 that drives the optical element, and control means 201 that controls the driving means. In driving the optical element toward a machine end in the optical apparatus, the control means controls the driving means on the basis of information on the characteristics of the machine end.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lens driving device that is mounted on an optical device such as a lens device. [Background technology]

[0002] When a lens in an optical device is driven by an actuator, a collision noise may occur if the lens collides with a member such as a stopper provided at the mechanical end of its movable range. Patent Document 1 discloses a technology in which, when the power is turned on, the lens is moved to both mechanical ends of the movable range, and deceleration control of the lens near the mechanical ends is performed based on position signal values ​​from position sensors at each mechanical end. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-311865 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the deceleration control disclosed in Patent Document 1 alone stops the lens drive before it reaches the mechanical end, i.e., an offset occurs between the controlled end of the lens and the mechanical end. The offset can be eliminated by using integral control, which performs control by accumulating the deviation between the current position and the mechanical end position over time. However, integral control may not be able to drive the lens smoothly, as the lens may stop just before the mechanical end and then start moving toward the mechanical end again. As a result, when driving a zoom lens, for example, a discontinuous change in the angle of view occurs near the mechanical end, causing a sense of discomfort to the user.

[0005] The present invention provides a lens driving device and an optical device that can smoothly drive a lens near a mechanical end. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided a driving device detachably attached to an optical device having a movable optical element. The driving device includes a driving means for driving the optical element and a control means for controlling the driving means. The control means controls the driving means based on information about the characteristics of the mechanical end when driving the optical element toward the mechanical end of the optical device.

[0007] Another aspect of the present invention is a control method applied to a drive device that is detachable from an optical device having a movable optical element and that has drive means for driving the optical element. The control method includes a step of controlling the drive means. In this step, when driving the optical element toward a mechanical end of the optical device, the drive means is controlled based on information about characteristics of the mechanical end. Note that a program that causes a computer of the drive device to execute processing in accordance with the control method also constitutes another aspect of the present invention. According to another aspect of the present invention, there is provided an optical device having a movable optical element and a detachable drive unit for driving the optical element, the optical device having a memory for storing information relating to mechanical characteristics of the optical element, and transmitting the information relating to the mechanical characteristics to the drive unit. [Effects of the Invention]

[0008] According to the present invention, the optical element can be smoothly driven near the mechanical end. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a block diagram showing the configuration of an imaging system including a lens device, an adapter device, and a camera device according to a first embodiment. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 10 is an explanatory diagram of conventional lens drive control. [Figure 5] FIG. 1 is a block diagram showing the configuration of a conventional lens drive control system. [Figure 6] FIG. 1 is a block diagram showing the configuration of a lens drive control system according to a first embodiment. [Figure 7] 5A and 5B are explanatory diagrams of lens drive control when the degree of buffering at the machine end is high in the first embodiment. [Figure 8] FIG. 10 is an explanatory diagram of drive control when the impact rate at the machine end is low in the first embodiment. [Figure 9] 4 is a flowchart showing an integral gain setting process in the first embodiment. [Figure 10] 4 is a flowchart showing a lens driving process in the first embodiment. [Figure 11] FIG. 10 is a block diagram showing the configuration of an imaging system including a lens device, an adapter device, and a camera device according to a second embodiment. [Figure 12] 10 is a flowchart showing a process of generating edge characteristic information in the second embodiment. [Figure 13] 11 is a flowchart showing a lens driving process in the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [Example]

[0011] FIG. 1 shows the configuration of an imaging system according to a first embodiment, which includes a lens device 1, an adapter device 2, and a camera device 3.

[0012] The lens device 1, which serves as an optical device, has an imaging optical system including a focus lens 106, a zoom lens 107, and an aperture 105. The imaging optical system forms an image of an external subject by focusing light from the subject. The focus lens 106 and the zoom lens 107 are each movable in the optical axis direction to perform focusing and zooming. The aperture 105 adjusts the amount of light by changing its opening diameter.

[0013] The camera device 3 converts a subject image into an electrical signal using an imaging unit 302 that includes an imaging element such as a CCD sensor or a CMOS sensor. A signal processing unit 304 generates a video signal from the electrical signal from the imaging unit 302. The video signal is displayed on a monitor (not shown) provided in the camera device 3, or recorded on a recording medium (not shown) that is detachably attached to the camera device 3.

[0014] The adapter device 2 as a driving device is detachably attached (connected) to the lens device 1, and drives the zoom lens 107 as an optical element with the driving force of an actuator included in the zoom driving unit 203. The adapter device 2 may also drive the focus lens 106 and the diaphragm 105 as optical elements.

[0015] A lens CPU 101 serving as a lens control means provided in the lens device 1 and a camera CPU 301 serving as a camera control means provided in the camera device 3 are computers that control the operations of the lens device 1 and the camera device 3, respectively. The lens CPU 101 and the camera CPU 301 can communicate with each other via a lens-camera communication unit 102 of the lens device 1 and a camera communication unit 304 of the camera device 3.

[0016] The diaphragm driver 103 and focus driver 104 include actuators that drive the diaphragm 105 and focus lens 106, respectively, and are controlled by the lens CPU 101. The focus position detector 108 is composed of an encoder or the like, and detects the position of the focus lens 106 in the optical axis direction. The zoom position detector 109 is composed of an encoder or the like, and detects the position of the zoom lens 107. The memory unit 110 is composed of a semiconductor memory or the like, and stores end characteristic information, which will be described later.

[0017] The adapter CPU 201 serving as control means provided in the adapter device 2 is a computer that controls the operation of the adapter device 2. The zoom driving unit 203 described above serving as driving means is controlled by the adapter CPU 201. The lens CPU 101 and the adapter CPU 201 can communicate with each other via the lens-adapter communication unit 111 of the lens device 1 and the adapter communication unit 204 of the adapter device 2. The lens CPU 101 transmits zoom driving commands to the adapter CPU 201 and transmits information on the position of the zoom lens 107 detected by the zoom position detection unit 109. The zoom position detection unit 109 may be provided in the adapter device 2.

[0018] The adapter connection detection unit 112 provided in the lens device 1 and the lens connection detection unit 205 provided in the adapter device 2 detect that the lens device 1 and the adapter device 2 are connected. Note that the connection between the lens device 1 and the adapter device 2 may be detected by communication between the lens-adapter communication unit 111 and the adapter communication unit 204.

[0019] In this embodiment, the adapter device 2 is described as being attachable to a lens device 1 that is separate from the camera device 3, but the adapter device may also be attachable to an imaging device (optical equipment) that has an integrated imaging optical system.

[0020] Lens drive control methods will be explained below with reference to Figs. 2 to 5. Fig. 2 shows proportional control (P control). Proportional control is a control method that adjusts the operation signal (lens drive amount) MV so that it is proportional to the deviation e between the current lens position and the target position (mechanical end), and the operation signal MV is calculated using the following equation 1. Kp is the proportional gain.

[0021] MV=Kp×e Equation 1 In this proportional control, the deviation e does not become completely zero, and a steady-state deviation called an offset remains. Therefore, the lens cannot be moved to the target position.

[0022] On the other hand, Figure 3 shows integral control (I control). Integral control is a control method that adjusts the operation signal MV according to the cumulative value of the deviation e between the current position and the target position for each time interval T(i+1)-Ti (i=1, 2, 3, ...). 9 In PI control, which combines proportional control and integral control, the operation signal MV is calculated using the following equation 2. Ki∫edt is the operation signal component in integral control, and Ki is the integral gain.

[0023] MV=Kp×e+Ki∫edt Equation 2 By using integral control, the lens can be made to reach the target position. However, with integral control, lens drive is stopped until the cumulative value of the deviation reaches a certain value (the time from T5 to T10 in FIG. 3). As a result, when the zoom lens 107 is driven to the target position, the angle of view stops changing temporarily near the target position indicated by A in FIG. 4, and then continues to change, which may cause a sense of discomfort to the user.

[0024] The integral gain Ki can be expressed by the following equation 3 using the integral time Ti.

[0025] Ki=Kp / Ti Equation 3 Therefore, if the integral time Ti is shortened, it is possible to strengthen the influence of the integral gain Ki. However, strengthening the influence of the integral gain Ki makes it more likely that hunting will occur in the lens drive, which could cause the lens to collide with the edge of the mechanism.

[0026] 5 shows a configuration for lens drive control using PI control shown in Equation 2. In this system, proportional control and integral control are performed using a deviation e between a position command value (target position) sent from the lens device 1 to the adapter device 2 and the current position of the zoom lens 107 detected by the zoom position detection unit 109, a proportional gain Kp, and an integral gain Ki. The results of the proportional control and the integral control are then added together and input to the zoom drive unit 203.

[0027] Next, optimal lens drive control for the zoom lens 107 driven toward the mechanical end in the first embodiment will be described with reference to FIG. 6. The lens device 1 stores the above-mentioned end characteristic information as information relating to the characteristics of the mechanical end in the memory unit 110. This end characteristic information is information for each lens device indicating the characteristics of the mechanical end with which the zoom lens 107 collides, and in this embodiment, includes information indicating the cushioning level (presence or absence of cushioning) of the end member as information relating to the characteristics of the end member, which is a member constituting the mechanical end. The end member is part of the lens barrel that holds the imaging optical system in the lens device 1. The information relating to the characteristics of the end member may be information indicating the characteristic itself, or may be information that can be converted into information indicating the characteristic.

[0028] The end characteristic information may be information indicating Young's modulus (modulus of longitudinal elasticity) as a characteristic of the end member. Furthermore, as information indicating the characteristics of not only the end member but also the lens device or lens barrel, information indicating the likelihood of generating (resonating) a collision sound when the zoom lens 107 collides with the mechanical end, or information indicating the likelihood of the zoom lens 107 bouncing (moving away from the mechanical end) after colliding with the mechanical end may be used. The likelihood of bouncing is determined not only by the characteristics of the end member but also by the magnitude of the resistance to movement of the zoom lens 107 within the lens barrel.

[0029] Furthermore, the end characteristic information may be information indicating not only the characteristics of the mechanical end itself but also the characteristics (such as cushioning factor and Young's modulus) of a lens holding member (not shown) that holds the zoom lens 107 and moves to the mechanical end, i.e., characteristics related to a collision at the mechanical end. In addition, the end characteristic information may be information that differs depending on the attitude (tilt) of the lens device 1 and the drive speed of the zoom lens 107.

[0030] The lens device 1 (lens CPU 101) transmits end characteristic information to the adapter device 2, and the adapter device 2 (adapter CPU 201) sets an integral gain Ki based on the received end characteristic information and performs lens drive control using PI control.

[0031] 7 shows lens drive control using PI control in Example 1 when the cushioning of the end member is higher than a predetermined value, i.e., when the member constituting the mechanical end has cushioning properties. In this case, even if the lens collides with the mechanical end, problems such as impact noise or damage do not occur, so the integral gain Ki is set to a larger first gain compared to when the cushioning of the mechanical end is low, as described below. This allows the zoom lens 107 to be driven all the way to the mechanical end without stopping, eliminating the user's discomfort caused by changes in the angle of view.

[0032] On the other hand, Figure 8 shows lens drive control using PI control in Example 1 when the cushioning of the machine end is lower than a predetermined value, i.e., when the components constituting the machine end do not have cushioning properties. In this case, since it is not possible to cause the lens to collide with the machine end, the integral gain Ki is set to a second gain that is smaller than the first gain described above. As a result, the integral time Ti becomes longer than in the case of Figure 7, and a phenomenon occurs in which the lens stops before reaching the machine end during integral control.

[0033] At this time, since there is no change in the position of the zoom lens 107 detected by the zoom position detection unit 109, the adapter CPU 201 determines that the zoom lens 107 has stopped, and stops driving the zoom lens 107 by the zoom drive unit 203 (position B). As a result, the zoom lens 107 cannot be driven to the mechanical end, resulting in a drive remainder C, but the user does not feel uncomfortable due to the change in the angle of view. In this case, the zoom lens 107 can be driven to a position closer to the mechanical end than when drive control is performed using proportional control alone, and therefore the user can generally obtain the angle of view that he or she desires.

[0034] The flowchart in FIG. 9 shows the integral gain setting process (control method) that the adapter CPU 201 executes according to a program in this embodiment.

[0035] First, in step S901, when the power supply of the adapter device 2 is turned on, the adapter CPU 201 proceeds to step S902.

[0036] In step S902, the adapter CPU 201 determines whether the adapter device 2 is connected to the lens device 1 through the lens connection detection unit 205, and if it is connected, performs processing in step S903, and if it is not connected, ends this processing.

[0037] In step S903, the adapter CPU 201 requests the lens CPU 101 via the adapter communication unit 204 to transmit edge characteristic information.

[0038] Next, in step S904, the adapter CPU 201 receives (acquires) the terminal characteristic information stored in the memory unit 110 from the lens CPU 101 via the adapter communication unit 204.

[0039] Next, in step S905, the adapter CPU 201 determines the degree of buffering at the machine end indicated by the received end characteristic information, and if the degree of buffering is higher than a predetermined value, performs the process of step S906, otherwise performs the process of step S907.

[0040] In step S906, the adapter CPU 201 sets the integral gain Ki to the first gain, and then ends this process.

[0041] In step S907, the adapter CPU 201 sets the integral gain Ki to the second gain, and then ends this process.

[0042] The flowchart in FIG. 10 shows the lens driving process (control method) that the adapter CPU 201 executes in accordance with a program in this embodiment.

[0043] In step S1001, when the adapter CPU 201 receives a zoom drive command from the lens CPU 101 via the adapter communication unit 204, it performs the process of step S1002.

[0044] In step S1002, the adapter CPU 201 requests the lens CPU 101 via the adapter communication unit 204 to transmit information about the current position of the zoom lens 107.

[0045] Next, in step S1003, the adapter CPU 201 receives (acquires) information on the position of the zoom lens 107 detected by the zoom position detection unit 109 from the lens CPU 101 via the adapter communication unit 204.

[0046] 9, the adapter CPU 201 generates a drive signal equivalent to the operation signal MV according to Equation 2. This is then output to the zoom drive unit 203 to start drive control of the zoom lens 107. As a result, PI control of the zoom lens 107 (zoom drive unit 203) is performed, and integral control is performed near the mechanical end.

[0047] Next, in step S1005, the adapter CPU 201 requests the lens CPU 101 via the adapter communication unit 204 to transmit information about the current position of the zoom lens 107 (after the zoom lens 107 starts to be driven).

[0048] Next, in step S1006, the adapter CPU 201 acquires information on the position of the zoom lens 107 detected by the zoom position detection unit 109 from the lens CPU 101 via the adapter communication unit 204.

[0049] Next, in step S1007, the adapter CPU 201 determines whether the zoom lens 107 has stopped from the acquired position information of the zoom lens 107, and if it has stopped, performs processing of step S1008, and if it has not stopped, returns to processing of step S1005.

[0050] In step S1008, the adapter CPU 201 checks whether the integral gain Ki used in step S1004 is the first gain, and if it is the first gain, ends this processing. In this case, the zoom lens 107 is driven to a position where it abuts against the mechanical end and is stopped. On the other hand, if the integral gain Ki used in step S1004 is the second gain, processing of step S1009 is performed.

[0051] In step S1009, the adapter CPU 201 stops drive control of the zoom lens 107. In this case, the zoom lens 107 stops just before the end of the machine. After this, the adapter CPU 201 ends this process.

[0052] According to this embodiment, it is possible to perform appropriate drive control of the zoom lens 107 near the mechanical end in accordance with the characteristics (such as the degree of shock absorption) of the zoom lens 107 in the lens device at the mechanical end, thereby suppressing changes in the angle of view that give the user a sense of discomfort near the mechanical end. [Example]

[0053] Next, a second embodiment will be described. Fig. 11 shows the configuration of an imaging system of the second embodiment, including a lens device 1', an adapter device 2, and a camera device 3. The lens device 1' has a configuration in which memory units 113 and 114, each composed of a semiconductor memory, are added to the memory unit 110 in the first embodiment. In this embodiment, components common to the first embodiment are designated by the same reference numerals as in the first embodiment.

[0054] The memory unit 113 records the number of times the zoom lens 107 has been driven. The lens CPU 101 updates the number of times the zoom lens 107 has been driven, stored in the memory unit 113, each time the zoom lens 107 is driven. The memory unit 114 stores, as table data, information relating to the degree of deterioration of the end member (or lens holding member) corresponding to the number of times the zoom lens 107 has been driven (hereinafter referred to as deterioration information). When setting the integral gain Ki, the lens CPU 101 acquires the deterioration information from the memory unit 114 and generates end characteristic information reflecting the deterioration information. In this embodiment, table data of deterioration information corresponding to the number of times the zoom lens 107 has been driven is stored in the memory unit 114. However, deterioration information corresponding to the usage time of the lens device 1′, which is generated by a timer function of the lens CPU 101, may also be stored as table data in the memory unit 114.

[0055] The flowchart in FIG. 12 shows the process of generating edge characteristic information, which is executed by the lens CPU 101 in accordance with a program in this embodiment.

[0056] First, in step S1201, when the power supply of the lens device 1' (that is, the power supply of the camera device 3 that supplies power to the lens device 1') is turned on, the process of step S1202 is performed.

[0057] In step S1202, the lens CPU 101 checks whether or not a transmission request for the terminal characteristic information has been received from the adapter device 2. If a transmission request has been received, the process of step S1203 is performed, and if a transmission request has not been received, this process is terminated.

[0058] In step S1203, the lens CPU 101 acquires the edge characteristic information from the memory unit 110.

[0059] Next, in step S1204, the lens CPU 101 acquires information on the number of times the zoom lens 107 has been driven from the memory unit 113.

[0060] Next, in step S1205, the lens CPU 101 acquires, from the memory unit 114, degradation information corresponding to the number of times the zoom lens 107 has been driven.

[0061] Next, in step S1206, the lens CPU 101 generates new end characteristic information that reflects the deterioration information acquired in step S1205 on the end characteristic information acquired in step S1203 (i.e., corrects the information according to the deterioration information), and then ends this process.

[0062] The end characteristic information reflecting the degradation information may be generated by the adapter CPU 201 instead of the lens CPU 101.

[0063] According to this embodiment, it is possible to perform appropriate drive control of the zoom lens 107 in accordance with the deterioration of the mechanical end of the zoom lens 107. [Example]

[0064] In the first and second embodiments, when the first gain is set as the integral gain Ki, the zoom lens 107 may collide with the mechanical end and bounce, returning to a position away from the mechanical end. In the third embodiment, in such a case, the end characteristic information is corrected according to the position of the bound zoom lens 107.

[0065] The flowchart in FIG. 13 shows the lens driving process (control method) that the adapter CPU 201 executes in accordance with a program in this embodiment.

[0066] The processing from step S1001 to step S1007 is the same as the processing from step S1001 to step S1007 in FIG. 10 described in the first embodiment.

[0067] In step S1008 after step S1007, the adapter CPU 201 checks whether the integral gain Ki used in step S1004 is the first gain, and if it is the first gain, performs the process of step S1301. On the other hand, if the integral gain Ki used in step S1004 is the second gain, performs the process of step S1009 shown in Fig. 10, and then ends this process.

[0068] In step S1301, the adapter CPU 201 determines whether the zoom lens 107 is currently positioned at the mechanical end based on the position information of the zoom lens 107 acquired in step S1006. If the zoom lens 107 is positioned at the mechanical end, i.e., if it has not bound at the mechanical end, this processing ends. On the other hand, if the zoom lens 107 is not positioned at the mechanical end, i.e., if it has bound at the mechanical end, processing of step S1302 is performed.

[0069] In step S1302, the adapter CPU 201 determines whether or not it has detected once through the zoom position detection unit 109 that the zoom lens 107 has reached the mechanical end while the zoom lens 107 is being driven. If it has detected once that the zoom lens 107 has reached the mechanical end, i.e., if the zoom lens 107 has come into contact with the mechanical end and bounded, it performs the processing of step S1303. On the other hand, if it has never detected that the zoom lens 107 has reached the mechanical end, i.e., if it has not bound at the mechanical end, it ends this processing.

[0070] In step S1303, the adapter CPU 201 acquires information about the current position of the zoom lens 107 after it has bound.

[0071] Next, in step S1304, the adapter CPU 201 corrects the end characteristic information in accordance with the position of the zoom lens 107 acquired in step S1303. Alternatively, the adapter CPU 201 transmits a request to correct the end characteristic information to the lens CPU 101. Then, this process ends.

[0072] According to this embodiment, if the integral gain Ki is set to the first gain and the zoom lens 107 collides with a mechanical end and bounds, the end characteristic information used to set the integral gain Ki is corrected. As a result, in the next drive control of the zoom lens 107, an appropriate integral gain Ki is set based on the corrected end characteristic information.

[0073] It should be noted that the lens CPU 101, rather than the adapter CPU 201, may correct the end characteristic information when the zoom lens 107 bounds at the mechanical end. [Example]

[0074] In the above first to third embodiments, the case where the integral gain Ki is set (changed) based on the end characteristic information has been described. However, if a collision sound or bounding occurs when the zoom lens 107 is actually driven to the mechanical end by an adapter device in which the integral gain Ki is set to the first gain, the user may be allowed to switch the integral gain Ki to the second gain.

[0075] Specifically, the adapter device may be provided with a changeover switch 210 as an operating means shown in parentheses in Fig. 1, and the adapter CPU 201 may switch the integral gain Ki to the second gain when the user operates the changeover switch 210. Also, the integral gain Ki may be switched from the second gain to the first gain when the user operates the changeover switch 210.

[0076] Furthermore, if a collision sound or bounding occurs when the zoom lens 107 is actually driven to the mechanical end, the lens CPU 101 or adapter CPU 201 may be configured to correct the end characteristic information by the user operating the changeover switch 210.

[0077] The above embodiment includes the following configurations.

[0078] (Configuration 1) A driving device that is detachable from an optical device having a movable optical element, a driving means for driving the optical element; a control means for controlling the driving means, A driving device characterized in that, when driving the optical element toward a mechanical end of the optical device, the control means controls the driving means based on information regarding characteristics of the mechanical end. (Configuration 2) 2. The drive device according to configuration 1, wherein the information about the characteristics of the machine end is information about the characteristics of a member that constitutes the machine end. (Configuration 3) The driving device according to configuration 1, wherein the information about the characteristics of the machine end is information about the characteristics of a member that holds the optical element and moves to the machine end. (Configuration 4) 4. The drive device according to configuration 2 or 3, wherein the characteristic of the member is a damping coefficient or a Young's modulus. (Configuration 5) The driving device according to configuration 1, wherein the information regarding the characteristics of the machine end is information regarding at least one of a collision sound and a bound generated when the optical element moves to the machine end. (Configuration 6) The driving device described in any one of configurations 1 to 5, characterized in that the information regarding the characteristics of the mechanical end varies depending on at least one of the attitude of the optical device, the driving speed of the optical element, and the degree of deterioration of the optical device. (Configuration 7) The drive device according to any one of configurations 1 to 6, wherein the control means uses information about the characteristics of the mechanical end corrected according to the position of the optical element that has bounced when the optical element moves to the mechanical end and bounds. (Configuration 8) The control means controlling the driving means using integral control when driving the optical element toward the machine end; 8. The drive device according to any one of configurations 1 to 7, wherein an integral gain in the integral control is set based on information about characteristics of the machine end. (Configuration 9) The control means when a first gain is set as the integral gain, the drive means is controlled using the integral control until the optical element is driven to the mechanical end; The driving device according to configuration 8, characterized in that when a second gain lower than the first gain is set as the integral gain, and when the optical element is stopped before reaching the mechanical end by control of the driving means using the integral control, control of the driving means is stopped. (Configuration 10) 10. The drive device according to any one of configurations 1 to 9, wherein the control means acquires information relating to the characteristics of the machine end from the optical device through communication. (Configuration 11) A drive device detachable from an optical device having a movable optical element, a driving means for driving the optical element; a control means for controlling the driving means, The control means controlling the driving means using integral control when driving the optical element toward a mechanical end of the optical instrument; A drive device, characterized in that an integral gain in the integral control is set in response to an operation by a user. (Configuration 12) An optical device having a movable optical element, and a drive device for driving the optical element being detachable, a memory for storing information relating to the characteristics of the mechanical end of the optical element; An optical device characterized in that information regarding the characteristics of the machine end is transmitted to the driving device. (Configuration 13) 13. The optical device according to claim 12, wherein the information about the characteristics of the machine end is information about the characteristics of a component that constitutes the machine end. (Configuration 14) 13. The optical device according to claim 12, wherein the information about the characteristics of the machine end is information about the characteristics of a member that holds the optical element and moves to the machine end. (Configuration 15) 15. The optical device according to claim 13 or 14, wherein the characteristic of the member is a cushioning coefficient or a Young's modulus. (Configuration 16) The optical device according to configuration 13, wherein the information regarding the characteristics of the machine end is information regarding at least one of a collision sound and a bound generated when the optical element moves to the machine end. (Configuration 17) 17. An optical device according to any one of configurations 12 to 16, characterized in that the information regarding the characteristics of the mechanical end varies depending on at least one of the attitude of the optical device, the drive speed of the optical element, and the degree of deterioration of the optical device. (Configuration 18) An optical device described in any one of configurations 12 to 17, characterized in that when the optical element moves to the end of the machine and bounces, information regarding the characteristics of the end of the machine is corrected according to the position of the bound optical element.

[0079] (Other Examples) The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and having one or more processors in the computer of the system or device read and execute the program.The present invention can also be realized by a circuit (e.g., ASIC) that realizes one or more functions.

[0080] The embodiments described above are merely representative examples, and various modifications and alterations are possible to each embodiment when implementing the present invention. [Explanation of symbols]

[0081] 1 Lens device 2 Adapter Device 3 Camera equipment 201 Adapter CPU 203 Zoom drive unit

Claims

1. A driving device that is detachable from an optical device having a movable optical element, a driving means for driving the optical element; a control means for controlling the driving means, A driving device characterized in that, when driving the optical element toward a mechanical end of the optical device, the control means controls the driving means based on information regarding characteristics of the mechanical end.

2. 2. The drive device according to claim 1, wherein the information about the characteristics of the machine end is information about the characteristics of a member that constitutes the machine end.

3. 2. The drive device according to claim 1, wherein the information about the characteristics of the machine end is information about the characteristics of a member that holds the optical element and moves to the machine end.

4. 4. The drive device according to claim 2, wherein the characteristic of the member is a cushioning factor or a Young's modulus.

5. 2. The drive device according to claim 1, wherein the information about the characteristics of the machine end is information about at least one of a collision sound and a bound that occurs when the optical element moves to the machine end.

6. 2. The drive device according to claim 1, wherein the information relating to the characteristics of the machine end varies depending on at least one of the attitude of the optical device, the drive speed of the optical element, and the degree of deterioration of the optical device.

7. The drive device according to claim 1, characterized in that, when the optical element moves to the end of the machine and bounds, the control means uses information regarding the characteristics of the end of the machine corrected according to the position of the bounded optical element.

8. The control means controlling the driving means using integral control when driving the optical element toward the machine end; 2. The drive device according to claim 1, wherein an integral gain in the integral control is set based on information about the characteristics of the machine end.

9. The control means when a first gain is set as the integral gain, the drive means is controlled using the integral control until the optical element is driven to the mechanical end; The driving device according to claim 8, characterized in that, when a second gain lower than the first gain is set as the integral gain, if the optical element is stopped before reaching the mechanical end by control of the driving means using the integral control, control of the driving means is stopped.

10. 2. The drive device according to claim 1, wherein the control means acquires information about the characteristics of the machine end from the optical device through communication.

11. A drive device detachable from an optical device having a movable optical element, a driving means for driving the optical element; a control means for controlling the driving means; an operation means operable by a user; The control means controlling the driving means using integral control when driving the optical element toward a mechanical end of the optical instrument; a drive device that sets an integral gain in the integral control in response to operation of the operating means;

12. An optical device having a movable optical element, and a drive device for driving the optical element being detachable, a memory for storing information relating to the characteristics of the mechanical end of the optical element; An optical device characterized in that information regarding the characteristics of the machine end is transmitted to the driving device.

13. 13. The optical device according to claim 12, wherein the information about the characteristics of the machine end is information about the characteristics of a member that constitutes the machine end.

14. 13. The optical device according to claim 12, wherein the information about the characteristics of the machine end is information about the characteristics of a member that holds the optical element and moves to the machine end.

15. 15. The optical device according to claim 13, wherein the characteristic of the member is a cushioning factor or a Young's modulus.

16. 14. The optical device according to claim 13, wherein the information relating to the characteristics of the machine end is information relating to at least one of a collision sound and a bound generated when the optical element is moved to the machine end.

17. 13. The optical device according to claim 12, wherein the information relating to the characteristics of the machine end varies depending on at least one of the attitude of the optical device, the drive speed of the optical element, and the degree of deterioration of the optical device.

18. 13. The optical device according to claim 12, wherein when the optical element moves to the mechanical end and bounds, information relating to the characteristics of the mechanical end is corrected in accordance with the position of the optical element that has bound.

19. A control method for a driving device that is detachable from an optical device having a movable optical element and has driving means for driving the optical element, comprising: controlling the driving means; In this step, when the optical element is driven toward a mechanical end of the optical device, the control method controls the driving means based on information relating to characteristics of the mechanical end.

20. A program causing a computer of the drive device to execute processing according to the control method of claim 19.

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