JP6812618B1 - Control device, imaging device, control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the performance of image shake correction in a system for correcting image shake by moving a plurality of lenses. SOLUTION: A control device for controlling an image shake correction device including a first lens and a second lens that corrects image shake by moving in a direction intersecting an optical axis is a first vibration signal indicating vibration from a vibration sensor. Is obtained, and the first lens is vibrated at a frequency in the first frequency band based on the first vibration signal, and the second lens is vibrated at a frequency in the second frequency band higher than the first frequency band to cause image shake. It is provided with a circuit configured to correct the above. [Selection diagram] Fig. 2

Description

The present invention relates to a control device, an imaging device, a control method, and a program.

Patent Document 1 discloses that the first lens and the second lens constituting the afocal system are rotated to correct the image shake.
[Prior art literature]
[Patent Document]
[Patent Document 1] Japanese Unexamined Patent Publication No. 9-251127

In a system that corrects image shake by moving a plurality of lenses, it is desired to improve the performance of image shake correction.

The control device according to one aspect of the present invention may be a control device that controls an image shake correction device including a first lens and a second lens that correct the image shake by moving in a direction intersecting the optical axis. The control device may include a circuit configured to acquire a first vibration signal indicating vibration from the vibration sensor. The circuit vibrates the first lens at a frequency in the first frequency band based on the first vibration signal, and vibrates the second lens at a frequency in the second frequency band higher than the first frequency band to cause image shake. It may be configured to compensate.

The second lens is lighter than the first lens.

The diameter of the second lens may be smaller than the diameter of the first lens.

The circuit may be configured to acquire a second vibration signal indicating the frequency of the first frequency band and a third vibration signal indicating the frequency of the second frequency band from the first vibration signal. The circuit vibrates the first lens at a frequency in the first frequency band based on the second vibration signal, and vibrates the second lens at a frequency in the second frequency band based on the third vibration signal to cause image shake. It may be configured to compensate.

The circuit vibrates the second lens at a frequency in the second frequency band based on the first vibration signal, and the first vibration signal is based on the difference between the third vibration signal indicating the vibration of the second lens and the first vibration signal. The image shake may be corrected by vibrating the lens at a frequency in the first frequency band.

The control device according to one aspect of the present invention may be a control device that controls an image shake correction device including a first lens and a second lens that correct the image shake by moving in a direction intersecting the optical axis. The control device may include a circuit configured to acquire a first vibration signal indicating vibration from the vibration sensor. The circuit vibrates the second lens based on the first vibration signal, and vibrates the first lens based on the difference between the second vibration signal indicating the vibration of the second lens and the first vibration signal. It may be configured to correct image shake.

The sensitivity of the first lens, which indicates the ratio between the amount of movement of the first lens and the amount of image shake correction by the first lens, indicates the ratio of the amount of movement of the second lens and the amount of image shake correction by the second lens. It may be lower than the sensitivity of the second lens.

The image shake correction device according to one aspect of the present invention includes the control device, the first lens, the second lens, the first drive unit that drives the first lens, and the second drive unit that drives the second lens. May be equipped with.

The first drive unit may include a first voice coil motor. The second drive unit may include a second voice coil motor.

The first drive unit may include a voice coil motor. The second drive unit may include a piezoelectric element or an ultrasonic motor.

The image pickup apparatus according to one aspect of the present invention may include the image shake correction device, a vibration sensor, and an image sensor that captures an image formed through the first lens and the second lens.

The control method according to one aspect of the present invention may be a control method for controlling an image shake correction device including a first lens and a second lens that correct the image shake by moving in a direction intersecting the optical axis. The control method may include a step of acquiring a first vibration signal indicating vibration from the vibration sensor. The control method is to vibrate the first lens at a frequency in the first frequency band and vibrate the second lens at a frequency in the second frequency band higher than the first frequency band based on the first vibration signal, thereby causing image shake. May be provided with a step of correcting.

The program according to one aspect of the present invention may be a program for operating a computer as the control device.

According to one aspect of the present invention, the performance of image shake correction can be improved.

The outline of the above invention does not list all the necessary features of the present invention. Sub-combinations of these feature groups can also be inventions.

It is a figure which shows an example of the external perspective view of the image pickup apparatus. It is a figure which shows the functional block of an image pickup apparatus. It is a figure which shows an example of the block diagram of the optical image shake correction mechanism. It is a figure which shows an example of the vibration signal of the 1st frequency band and the 2nd frequency band included in the image shake frequency. It is a figure which shows an example of the frequency of the 1st frequency band and the frequency of the 2nd frequency band included in the image shake frequency. It is a figure which shows another example of the block diagram of the optical image shake correction mechanism. It is a figure which shows an example of the vibration signal of an image shake frequency, and the vibration signal of a lens which vibrates at a high frequency. It is a figure which shows an example of the vibration signal of the difference between the vibration signal of an image shake frequency and the vibration signal of a lens which vibrates at a high frequency. It is a figure which shows an example of a hardware configuration.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention. It will be apparent to those skilled in the art that various changes or improvements can be made to the following embodiments. It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

The claims, description, drawings, and abstracts include matters that are subject to copyright protection. The copyright holder will not object to any person's reproduction of these documents as they appear in the Patent Office files or records. However, in other cases, all copyrights are reserved.

Various embodiments of the present invention may be described with reference to flowcharts and block diagrams, wherein the block is (1) a stage of the process in which the operation is performed or (2) a device having a role of performing the operation. May represent the "part" of. Specific stages and "parts" may be implemented by programmable circuits and / or processors. Dedicated circuits may include digital and / or analog hardware circuits. It may include integrated circuits (ICs) and / or discrete circuits. The programmable circuit may include a reconfigurable hardware circuit. Reconfigurable hardware circuits include logical AND, logical OR, logical XOR, logical NAND, logical NOR, and other logical operations, flip-flops, registers, field programmable gate arrays (FPGA), programmable logic arrays (PLA), etc. It may include a memory element such as.

The computer-readable medium may include any tangible device capable of storing instructions executed by the appropriate device. As a result, the computer-readable medium having the instructions stored therein will include the product, including instructions that can be executed to create means for performing the operation specified in the flowchart or block diagram. Examples of computer-readable media may include electronic storage media, magnetic storage media, optical storage media, electromagnetic storage media, semiconductor storage media, and the like. More specific examples of computer-readable media include floppy® disks, diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), Electrically erasable programmable read-only memory (EEPROM), static random access memory (SRAM), compact disc read-only memory (CD-ROM), digital versatile disc (DVD), Blu-ray (RTM) disc, memory stick, integrated A circuit card or the like may be included.

Computer-readable instructions may include either source code or object code written in any combination of one or more programming languages. Source code or object code includes traditional procedural programming languages. Traditional procedural programming languages include assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state-setting data, or Smalltalk, JAVA®, C ++, etc. It may be an object-oriented programming language, and a "C" programming language or a similar programming language. Computer-readable instructions are used locally or on a local area network (LAN), wide area network (WAN) such as the Internet, to the processor or programmable circuit of a general purpose computer, special purpose computer, or other programmable data processing device. ) May be provided. The processor or programmable circuit may execute computer-readable instructions to create means for performing the operations specified in the flowchart or block diagram. Examples of processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers and the like.

FIG. 1 is a diagram showing an example of an external perspective view of the image pickup apparatus 100 according to the present embodiment. FIG. 2 is a diagram showing a functional block of the image pickup apparatus 100 according to the present embodiment.

The image pickup apparatus 100 includes an image pickup section 102 and a lens section 200. The image pickup unit 102 includes an image sensor 120, an image pickup control unit 110, and a memory 130. The image sensor 120 may be configured by CCD or CMOS. The image sensor 120 outputs the image data of the optical image formed through the zoom lens 211 and the focus lens 210 to the image pickup control unit 110. The image pickup control unit 110 may be composed of a CPU, a microprocessor such as an MPU, a microcontroller such as an MCU, or the like. The memory 130 may be a computer-readable recording medium and may include at least one of flash memories such as SRAM, DRAM, EPROM, EEPROM, and USB memory. The memory 130 stores a program or the like necessary for the image pickup control unit 110 to control the image sensor 120 or the like. The memory 130 may be provided inside the housing of the image pickup apparatus 100. The memory 130 may be provided so as to be removable from the housing of the image pickup apparatus 100.

The imaging unit 102 may further include an indicator unit 162 and a display unit 160. The instruction unit 162 is a user interface that receives an instruction to the image pickup apparatus 100 from the user. The display unit 160 displays an image captured by the image sensor 120, various setting information of the image pickup device 100, and the like. The display unit 160 may be composed of a touch panel.

The lens unit 200 includes a focus lens 210, a zoom lens 211, a lens drive unit 212, a lens drive unit 213, and a lens control unit 220. The focus lens 210 and the zoom lens 211 may include at least one lens. At least a part or all of the focus lens 210 and the zoom lens 211 are arranged so as to be movable along the optical axis. The lens unit 200 may be an interchangeable lens that is detachably provided to the imaging unit 102. The lens driving unit 212 moves at least a part or all of the focus lens 210 along the optical axis via a mechanical member such as a cam ring and a guide shaft. The lens driving unit 213 moves at least a part or all of the zoom lens 211 along the optical axis via a mechanical member such as a cam ring and a guide shaft. The lens control unit 220 drives at least one of the lens drive unit 212 and the lens drive unit 213 according to a lens control command from the image pickup unit 102, and emits light at least one of the focus lens 210 and the zoom lens 211 via a mechanical member. By moving along the axial direction, at least one of the zoom operation and the focus operation is executed. The lens control command is, for example, a zoom control command and a focus control command.

The lens unit 200 further includes a memory 240, a position sensor 214, and a position sensor 215. The memory 240 stores the control values of the focus lens 210 and the zoom lens 211 that move via the lens drive unit 212 and the lens drive unit 213. The memory 240 may include at least one of flash memories such as SRAM, DRAM, EPROM, EEPROM, and USB memory. The position sensor 214 detects the position of the focus lens 210. The position sensor 214 may detect the current focus position. The position sensor 215 detects the position of the zoom lens 211. The position sensor 215 may detect the current zoom position of the zoom lens 211.

The lens unit 200 has an optical image stabilization mechanism (OIS). More specifically, the lens unit 200 includes a lens 231 and a lens 232 for image shake correction, a lens drive unit 233, a lens drive unit 234, a position sensor 235, a position sensor 236, and a vibration sensor 250. The vibration sensor 250 may be a gyro sensor that detects the vibration of the image pickup apparatus 100. The vibration sensor 250 may be an acceleration sensor that detects the vibration of the image pickup apparatus 100. The gyro sensor detects, for example, angular shake and rotational shake. The accelerometer detects, for example, shift deviation in the X direction or the Y direction. Even with a gyro sensor, angles and rotations can be converted into components in the X direction and components in the Y direction. The accelerometer can also convert shift blur in the X direction and Y direction into angular blur and rotational blur. The vibration sensor 250 may be a combination of an acceleration sensor and a gyro sensor. The lens driving unit 233 moves the lens 231 in a direction intersecting the optical axis. The lens driving unit 233 may move the lens 231 in a direction orthogonal to the optical axis. The lens drive unit 233 may include a voice coil motor. The lens driving unit 234 moves the lens 232 in a direction intersecting the optical axis. The lens driving unit 234 may move the lens 232 in a direction orthogonal to the optical axis. The lens drive unit 234 may include a voice coil motor.

The position sensor 235 detects the position of the lens 231. The position sensor 235 may detect the position in the direction perpendicular to the optical axis of the lens 231. The position sensor 235 may output the position in the direction perpendicular to the optical axis of the lens 231 as a vibration signal indicating the vibration of the lens 231. The position sensor 236 detects the position of the lens 232. The position sensor 236 may detect the position in the direction perpendicular to the optical axis of the lens 232. The position sensor 236 may output the position in the direction perpendicular to the optical axis of the lens 232 as a vibration signal indicating the vibration of the lens 232.

The lens unit 200 is an example of an image shake correction device. The lens control unit 220 acquires a first vibration signal indicating vibration from the vibration sensor 250, and based on the first vibration signal, sets the lens 231 and the lens 232 on the optical axis via the lens drive unit 233 and the lens drive unit 234. The image shake is corrected by vibrating in the direction intersecting with. The image sensor 120 captures an image formed through the zoom lens 211, the focus lens 210, the lens 232, and the lens 232.

The lens control unit 220 vibrates the lens 232 at a frequency in the first frequency band via the lens drive unit 234, and vibrates the lens 231 at a frequency in the second frequency band higher than the first frequency band via the lens drive unit 233. By making it, the image shake is corrected.

By independently driving the lens 231 and the lens 232 for image shake correction, the lens drive unit 233 and the lens drive unit 234 that drive each of the lens 231 and the lens 232 can be miniaturized. By driving the lens 231 and the lens 232 in different frequency bands, it is possible to reduce the influence on the image shake correction due to the position error of the lens 231 and the lens 232 detected by the position sensor 235 and the position sensor 236. Further, by driving the lens 231 and the lens 232 in different frequency bands, image shake can be corrected over a wide frequency band.

The lens 231 may be lighter than the lens 232. The diameter of the lens 231 may be smaller than the diameter of the lens 232. By reducing the size of the lens 231 driven in a relatively high frequency band, the power consumed by the lens driving unit 233 can be reduced.

The lens control unit 220 may extract the vibration signal of the first frequency band and the vibration signal of the second frequency band from the vibration signal from the vibration sensor 250 by the filter. The lens control unit 220 vibrates the lens 232 at the frequency of the first frequency band via the lens drive unit 234 based on the vibration signal of the first frequency band, and drives the lens based on the vibration signal of the second frequency band. The lens 231 may be vibrated at a frequency in the first frequency band via the unit 233.

The lens control unit 220 may vibrate the lens 231 at a frequency in the second frequency band via the lens drive unit 233 based on the vibration signal from the vibration sensor 250. Further, the lens control unit 220 sets the lens 232 via the lens drive unit 234 based on the difference between the vibration signal indicating the vibration of the lens 231 detected by the position sensor 235 and the vibration signal from the vibration sensor 250. It may be vibrated at a frequency in one frequency band.

The sensitivity of the lens 231 may be different from the sensitivity of the lens 232. Sensitivity indicates the ratio of the amount of movement of the lens to the amount of correction of image shake by the lens. A lens having a high sensitivity has a larger amount of image shake correction with respect to the amount of movement of the lens than a lens having a low sensitivity. That is, a lens having a high sensitivity can obtain a larger effect of correcting image shake with less movement than a lens having a low sensitivity. The sensitivity of the lens 232 may be lower than the sensitivity of the lens 231. The lens control unit 220 may vibrate the highly sensitive lens 231 at a frequency in the second frequency band and the less sensitive lens 232 at a frequency in the first frequency band lower than the second frequency band.

The lens control unit 220 vibrates the highly sensitive lens 231 at a frequency in the second frequency band via the lens drive unit 233 based on the vibration signal from the vibration sensor 250, and the lens 231 detected by the position sensor 235. The lens 232 having low sensitivity may be vibrated at a frequency in the first frequency band via the lens driving unit 234 based on the difference between the vibration signal indicating the vibration of the lens and the vibration signal from the vibration sensor 250. That is, the lens control unit 220 first vibrates the highly sensitive lens 231 based on the vibration signal from the vibration sensor 250, and then vibrates the lens 231 to eliminate the image blur that could not be eliminated by the low sensitivity. The correction is made by vibrating the lens 232.

The lens driving unit 233 that drives the lens 231 may include a piezoelectric element or an ultrasonic motor instead of the voice coil motor. Miniaturization can be achieved by using a piezoelectric element or an ultrasonic motor.

FIG. 3 is a diagram showing an example of a block diagram of the optical image runout correction mechanism. The block diagram of FIG. 3 shows an example in which a vibration signal in the first frequency band and a vibration signal in the second frequency band are extracted from the vibration signal from the vibration sensor 250 to drive the voice coil motors 2312 and 2322, respectively. ..

The vibration signal from the vibration sensor 250 is input to the filter 252. The filter 252 outputs a vibration signal indicating a frequency component of image shake. As shown in FIGS. 4 and 5, the PID 2311 extracts a vibration signal 502 indicating vibration in the second frequency band from the vibration signal 500 from the filter 252, and the PID 2311 is a vibration signal indicating vibration in the second frequency band. The voice coil motor 2312 is driven based on the 502 to vibrate the lens 231. The position sensor 235 outputs a vibration signal indicating the vibration of the lens 231. Feedback control is executed by inputting the vibration signal of the difference between the vibration signal from the filter 252 and the vibration signal from the position sensor 235 to the PID 2311.

Similarly, as shown in FIGS. 4 and 5, the PID 2321 extracts the vibration signal 501 indicating the vibration of the first frequency band from the vibration signal 500 from the filter 252, and the PID 2321 generates the vibration of the first frequency band. The voice coil motor 2322 is driven based on the vibration signal 501 shown to vibrate the lens 232. The position sensor 236 outputs a vibration signal indicating the vibration of the lens 232. Feedback control is performed by inputting the vibration signal of the difference between the vibration signal from the filter 252 and the vibration signal from the position sensor 236 to the PID 2321. The filter 252 may extract the vibration signal 501 indicating the vibration in the first frequency band and the vibration signal 502 indicating the vibration in the second frequency band from the vibration signal 500.

FIG. 6 is a diagram showing another example of the block diagram of the optical image runout correction mechanism. In the block diagram of FIG. 6, the lens 231 is vibrated at the frequency of the second frequency band based on the vibration signal from the vibration sensor 250, and the image shake that cannot be corrected by the lens 231 is measured at the frequency of the first frequency band. An example of correction by vibrating the lens 232 is shown.

The vibration signal from the vibration sensor 250 is input to the filter 252. The filter 252 outputs a vibration signal indicating a frequency component of image shake. As shown in FIG. 7, the PID 2311 drives the voice coil motor 2312 based on the vibration signal 511 from the filter 252 to vibrate the lens 231. The position sensor 235 outputs a vibration signal 512 indicating the vibration of the lens 231. As shown in FIG. 8, the vibration signal 513 of the difference between the vibration signal 511 from the filter 252 and the vibration signal 512 from the position sensor 235 is input to the PID 2321 and the PID 2311. The PID 2321 drives the voice coil motor 2322 to vibrate the lens 232 based on the difference vibration signal 513. The position sensor 236 outputs a vibration signal indicating the vibration of the lens 232. Feedback control is executed by inputting the difference vibration signal 513 and the difference vibration signal from the position sensor 236 to the PID 2321.

According to this embodiment, a small lens 231 having a relatively small moment of inertia can be vibrated at a high frequency, and a large lens 232 having a relatively large moment of inertia can be vibrated at a low frequency. As a result, power consumption can be reduced and the performance of image shake correction can be improved.

FIG. 9 shows an example of a computer 1200 in which a plurality of aspects of the present invention may be embodied in whole or in part. The program installed on the computer 1200 can cause the computer 1200 to function as an operation associated with the device according to an embodiment of the present invention or as one or more "parts" of the device. Alternatively, the program may cause the computer 1200 to perform the operation or one or more "parts". The program can cause a computer 1200 to perform a process or a step of the process according to an embodiment of the present invention. Such a program may be run by the CPU 1212 to cause the computer 1200 to perform certain operations associated with some or all of the blocks in the flowcharts and block diagrams described herein.

The computer 1200 according to this embodiment includes a CPU 1212 and a RAM 1214, which are connected to each other by a host controller 1210. The computer 1200 also includes a communication interface 1222, an input / output unit, which are connected to the host controller 1210 via an input / output controller 1220. The computer 1200 also includes a ROM 1230. The CPU 1212 operates according to the programs stored in the ROM 1230 and the RAM 1214, thereby controlling each unit.

Communication interface 1222 communicates with other electronic devices via a network. A hard disk drive may store programs and data used by the CPU 1212 in the computer 1200. The ROM 1230 stores in it a boot program or the like executed by the computer 1200 at the time of activation, and / or a program depending on the hardware of the computer 1200. The program is provided via a computer-readable recording medium such as a CR-ROM, USB stick or IC card or network. The program is installed in RAM 1214 or ROM 1230, which is also an example of a computer-readable recording medium, and is executed by CPU 1212. The information processing described in these programs is read by the computer 1200 and provides a link between the program and the various types of hardware resources described above. The device or method may be configured to implement the operation or processing of information according to the use of the computer 1200.

For example, when communication is executed between the computer 1200 and an external device, the CPU 1212 executes a communication program loaded in the RAM 1214, and performs communication processing on the communication interface 1222 based on the processing described in the communication program. You may order. Under the control of the CPU 1212, the communication interface 1222 reads the transmission data stored in the transmission buffer area provided in the RAM 1214 or a recording medium such as a USB memory, and transmits the read transmission data to the network, or The received data received from the network is written to the reception buffer area or the like provided on the recording medium.

Further, the CPU 1212 makes the RAM 1214 read all or necessary parts of a file or a database stored in an external recording medium such as a USB memory, and executes various types of processing on the data on the RAM 1214. Good. The CPU 1212 may then write back the processed data to an external recording medium.

Various types of information such as various types of programs, data, tables, and databases may be stored in recording media and processed. The CPU 1212 describes various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, and information retrieval described in various parts of the present disclosure with respect to the data read from the RAM 1214, and is specified by the instruction sequence of the program. Various types of processing may be performed, including / replacement, etc., and the results are written back to the RAM 1214. Further, the CPU 1212 may search for information in a file, a database, or the like in the recording medium. For example, when a plurality of entries each having an attribute value of the first attribute associated with the attribute value of the second attribute are stored in the recording medium, the CPU 1212 specifies the attribute value of the first attribute. Search for an entry that matches the condition from the plurality of entries, read the attribute value of the second attribute stored in the entry, and associate it with the first attribute that satisfies the predetermined condition. The attribute value of the second attribute obtained may be acquired.

The program or software module described above may be stored on a computer 1200 or in a computer readable storage medium near the computer 1200. Also, a recording medium such as a hard disk or RAM provided in a dedicated communication network or a server system connected to the Internet can be used as a computer-readable storage medium, thereby allowing the program to be transferred to the computer 1200 over the network. provide.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

The order of execution of each process such as operation, procedure, step, and step in the device, system, program, and method shown in the claims, specification, and drawings is particularly "before" and "prior to". It should be noted that the output of the previous process can be realized in any order unless it is used in the subsequent process. Even if the scope of claims, the specification, and the operation flow in the drawings are explained using "first", "next", etc. for convenience, it means that it is essential to carry out in this order. It's not a thing.

100 Imaging device 102 Imaging unit 110 Imaging control unit 120 Image sensor 130 Memory 160 Display unit 162 Indicator unit 200 Lens unit 210 Focus lens 211 Zoom lens 212,213,233,234 Lens drive unit 2312,2322 Voice coil motor 214,215 235,236 Position sensor 220 Lens control unit 231,232 Lens 240 Memory 250 Vibration sensor 252 Filter 1200 Computer 1210 Host controller 1212 CPU
1214 RAM
1220 Input / Output Controller 1222 Communication Interface 1230 ROM

Claims (10)

A control device that controls an image shake correction device including a first lens and a second lens that corrects image shake by moving in a direction intersecting the optical axis.
Obtain the first vibration signal indicating vibration from the vibration sensor,
Based on the first vibration signal, the first lens is vibrated at a frequency in the first frequency band, and the second lens is vibrated at a frequency in the second frequency band higher than the first frequency band, thereby causing image shake. Equipped with a circuit configured to correct
The circuit
Based on the difference between the second vibration signal indicating the vibration of the second lens and the first vibration signal, the second lens is vibrated at a frequency in the second frequency band, and the second vibration signal and the first vibration signal are vibrated. Image shake is corrected by vibrating the first lens at a frequency in the first frequency band based on the difference between the difference from the vibration signal and the third vibration signal indicating the vibration of the first lens. A control device configured as such . The control device according to claim 1, wherein the second lens is lighter than the first lens. The control device according to claim 1 or 2 , wherein the diameter of the second lens is smaller than the diameter of the first lens.
The sensitivity of the first lens, which indicates the ratio between the amount of movement of the first lens and the amount of correction of image shake by the first lens, is the amount of movement of the second lens and the amount of correction of image shake by the second lens. The control device according to any one of claims 1 to 3, which is lower than the sensitivity of the second lens showing the ratio to and. The control device according to any one of claims 1 to 4 .
With the first lens
With the second lens
The first drive unit that drives the first lens and
An image shake correction device including a second drive unit that drives the second lens. The first drive unit includes a first voice coil motor.
The image shake correction device according to claim 5 , wherein the second drive unit includes a second voice coil motor. The first drive unit includes a voice coil motor.
The image shake correction device according to claim 5 , wherein the second drive unit includes a piezoelectric element or an ultrasonic motor. The image shake correction device according to any one of claims 5 to 7 .
With the vibration sensor
An imaging device including an image sensor that captures an image formed through the first lens and the second lens. A control method for controlling an image shake correction device including a first lens and a second lens that corrects image shake by moving in a direction intersecting the optical axis.
The stage of acquiring the first vibration signal indicating vibration from the vibration sensor, and
Based on the first vibration signal, the first lens is vibrated at a frequency in the first frequency band, and the second lens is vibrated at a frequency in the second frequency band higher than the first frequency band, thereby causing image shake. and a stage for correcting the,
The step of correcting the image shake is
Based on the difference between the second vibration signal indicating the vibration of the second lens and the first vibration signal, the second lens is vibrated at a frequency in the second frequency band, and the second vibration signal and the first vibration signal are vibrated. Image vibration is corrected by vibrating the first lens at a frequency in the first frequency band based on the difference between the difference from the vibration signal and the third vibration signal indicating the vibration of the first lens. , Control method. A program for operating a computer as a control device according to any one of claims 1 to 4 .