JP2014092756A - Image shake correcting device, optical equipment comprising the same, imaging device, and control method of image shake correcting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately perform pixel shift without causing delayed light exposure processing when the pixel shift is performed using an image shake correcting member.SOLUTION: An image shake correcting device comprises: an image shake correcting member for correcting an image shake on an imaging surface by moving according to the shake; and a control part for controlling the movement of the image shake correcting member. The control part moves the image shake correcting member by a prescribed amount according to a pixel of an imaging element while making a correction residual amount of the image shake correcting member coincide with the prescribed amount when a plurality of images are obtained.

Description

  The present invention relates to a technique for correcting image shake caused by shake of an imaging apparatus.

  Conventionally, an image blur correction function detects an image blur of an apparatus, and moves an image blur correction member (an image blur correction lens and its holding member) movable so as to correct an image blur caused by the blur. It is done by moving in the direction to cancel.

  On the other hand, an imaging apparatus using a so-called pixel shift technique has already been proposed. In this technology, multiple sets of image signals are obtained by performing multiple shootings while slightly changing the relative position between the subject image formed by the imaging optical system and the image sensor that photoelectrically converts the subject image. A high-definition image is obtained by combining a plurality of sets of image signals by a predetermined method. For example, the following are known as prior art documents for pixel shifting.

  In Patent Document 1, a variable apex prism in front of an image pickup optical system is driven based on an image blur signal and a pixel shift signal, and an optical image on the image sensor is decentered in parallel to eliminate image blur due to image blur correction and a pixel. At the same time, high-definition images are achieved by shifting. Further, it is disclosed that pixel shift control is prohibited when the focal length of the imaging optical system is equal to or greater than a predetermined value.

  Further, Patent Document 2 discloses that the operation such as changing the number of pixel shifts is changed according to the setting state of the exposure control condition setting unit that determines the combination of the aperture value and the exposure time as the imaging condition. Has been made.

JP-A-7-287268 JP 10-191135 A

  The methods described in Patent Document 1 and Patent Document 2 are highly effective in driving the image blur correction member with respect to pixel shifting under certain ideal conditions. This specific ideal condition is a condition in which the imaging apparatus is shaken greatly and no large acceleration disturbance is applied.

  However, considering the case of shifting pixels while hand-held shooting, there are cases where the photographer performs pan and tilt operations or moves the imaging device sharply. It is difficult to drive only a very small distance for shifting. In addition to driving the lens for image blur correction, it is necessary to offset the drive signal in steps by a minute distance for pixel shifting, and until the shooting is completed for the pixel shifting operation. There are problems such as time-consuming and slow speed.

  The present invention has been made in view of the above-described problems, and an object thereof is to perform pixel shifting with high accuracy without causing a delay in exposure processing when pixel shifting is performed using an image blur correction member. It is to be.

  An image shake correction apparatus according to the present invention includes an image shake correction member that corrects an image shake on the imaging surface by moving in accordance with the shake, and a control unit that controls movement of the image shake correction member. The control unit is configured to match a remaining correction amount of the image shake correction member with the predetermined amount when obtaining a plurality of images while moving the image shake correction member by a predetermined amount according to pixels of the image sensor. And

  According to the present invention, when performing pixel shift using an image blur correction member, it is possible to perform pixel shift with high accuracy without causing a delay in exposure processing.

It is a block diagram which shows the function structural example of the imaging device concerning one Embodiment of this invention. FIG. 2 is a block diagram illustrating a configuration example of an image shake correction driving unit in FIG. 1. FIG. 3 is an exploded perspective view illustrating a configuration example of an image shake correction mechanism according to an embodiment. 3 is a block diagram illustrating an internal configuration of an image blur correction control unit according to an embodiment. FIG. It is a flowchart which shows the pixel shift procedure in one Embodiment. It is a flowchart which shows the pixel shift procedure in one Embodiment. It is a flowchart which shows the pixel shift procedure in one Embodiment. It is a figure which shows the drive command for pixel shift in one Embodiment. The figure which shows an example of the image blurring correction remaining signal at the time of panning photography by panning and tilting.

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

  FIG. 1 is a block diagram illustrating a functional configuration example of an imaging apparatus according to an embodiment of the present invention. In this embodiment, the imaging apparatus is a digital still camera, but may have a moving image shooting function. In the embodiment of the present invention, “pixel shift” means that a plurality of sets of image signals are obtained by shooting a plurality of times using a minute relative position with respect to an image sensor that photoelectrically converts a subject image. A high-definition image is obtained by combining a plurality of sets of image signals by a predetermined method. In particular, a method of controlling an image blur correction member (such as an image blur correction lens) for performing a plurality of shootings using a minute change in relative position with an image sensor that photoelectrically converts a subject image.

  The zoom unit 101 is a part of a photographic lens having a variable magnification, which forms an imaging optical system, and includes a zoom lens that changes the magnification of the photographic lens. The zoom drive unit 102 drives the zoom unit 101 according to the control of the control unit 119. The image blur correction lens 103 as an image blur correction member is configured to be movable in a direction perpendicular to the optical axis of the photographing lens. The image blur correction lens driving unit 104 controls driving of the image blur correction lens 103.

  The aperture / shutter unit 105 is a mechanical shutter having an aperture function. The aperture / shutter driving unit 106 drives the aperture / shutter unit 105 according to the control of the control unit 119. The focus lens 107 is a part of the photographing lens, and is configured to be able to change its position along the optical axis of the photographing lens. The focus driving unit 108 drives the focus lens 107 according to the control of the control unit 119.

  The imaging unit 109 converts an optical image formed by the photographing lens into an electrical signal in pixel units using an imaging element such as a CCD image sensor or a CMOS image sensor. The imaging signal processing unit 110 performs A / D conversion, correlated double sampling, gamma correction, white balance correction, color interpolation processing, and the like on the electrical signal output from the imaging unit 109 and converts the electrical signal into a video signal. The video signal processing unit 111 processes the video signal output from the imaging signal processing unit 110 according to the application. Specifically, the video signal processing unit 111 generates a video for display or performs an encoding process or a data file for recording.

  The display unit 112 displays an image as necessary based on the video signal for display output from the video signal processing unit 111. The power supply unit 115 supplies power to the entire imaging apparatus according to the application. The external input / output terminal unit 116 inputs / outputs communication signals and video signals to / from external devices. The operation unit 117 includes buttons and switches for the user to give instructions to the imaging apparatus. The storage unit 118 stores various data such as video information. The control unit 119 includes, for example, a CPU, a ROM, and a RAM. The control unit 119 controls each unit of the imaging apparatus by developing a control program stored in the ROM and executing the control program on the RAM, and includes various operations described below. The operation of the imaging device is realized.

  The operation unit 117 includes a release button configured such that the first switch (SW1) and the second switch (SW2) are sequentially turned on according to the amount of pressing. The release switch SW1 is turned on when the release button is depressed approximately half, and the release switch SW2 is turned on when the release button is pushed down to the end.

  When the release switch SW1 is turned on, the control unit 119 controls the focus driving unit 108 based on the AF evaluation value based on the display video signal output from the video signal processing unit 111 to the display unit 112, for example, thereby performing automatic focus detection. Do. Further, the control unit 119 performs AE processing for determining an aperture value and a shutter speed for obtaining an appropriate exposure amount based on luminance information of the video signal and, for example, a predetermined program diagram. When the release switch SW2 is turned on, the control unit 119 performs imaging with the determined aperture and shutter speed, and controls each unit so that the image data obtained by the imaging unit 109 is stored in the storage unit 118.

  The operation unit 117 includes a selection switch that allows the image blur correction mode to be selected. When the image blur correction mode is selected by the selection switch, the control unit 119 instructs the image blur correction lens driving unit 104 to perform an image blur correction operation, and the image blur correction lens driving unit 104 that has received this instruction turns the image blur correction off. The image blur correction operation is performed until instructed. Further, the operation unit 117 includes a shooting mode selection switch that can select one of a still image shooting mode and a moving image shooting mode, and the operation of the image blur correction lens driving unit 104 in each shooting mode. Conditions can be changed.

  In addition, the operation unit 117 includes a pixel shift setting switch for setting whether to perform pixel shift on the imaging surface of the image sensor, and the setting is notified to the pixel shift setting unit 211 (see FIG. 2). The operation unit 117 also includes a playback mode selection switch for selecting a playback mode, and stops the image blur correction operation in the playback mode.

  The operation unit 117 also includes a magnification change switch for giving an instruction to change the zoom magnification. When there is an instruction to change the zoom magnification using the magnification change switch, the zoom driving unit 102 that has received the instruction via the control unit 119 drives the zoom unit 101 to move the zoom unit 101 to the instructed zoom position.

(Configuration of image shake correction lens driving unit 104)
FIG. 2 is a block diagram illustrating a functional configuration example of the image blur correction lens driving unit 104.

  The first vibration detection sensor 201 is, for example, an angular velocity sensor, and detects vibration in the vertical direction (pitch direction) of the imaging apparatus in a normal posture (a posture in which the length direction of the image substantially matches the horizontal direction). The second vibration detection sensor 202 is an angular velocity sensor, for example, and detects vibration in the horizontal direction (yaw direction) of the imaging apparatus in a normal posture. The first and second image blur correction controllers 203 and 204 output correction position control signals for the image blur correction lens in the pitch direction and the yaw direction, respectively, and control the driving of the image blur correction lens.

  The first lens position control unit 205 is based on the correction position control signal in the pitch direction from the first image blur correction control unit 203 and the position information in the pitch direction of the image blur correction lens 103 from the first Hall element 209. The first drive unit 207 is driven by feedback control. Similarly, the second lens position control unit 206 includes a correction position control signal in the yaw direction from the second image blur correction control unit 204 and position information in the yaw direction of the image blur correction lens from the second Hall element 210. Therefore, the second drive unit 208 is driven by feedback control.

  In addition, the pixel shift setting unit 211 has the pixel shift control unit 212 set the first and second image blur correction control units 203 for pixel shift when the photographer performs setting to perform pixel shift using the operation unit 117. A change in calculation parameter of the image blur correction lens target position 204 is notified. In addition, the control parameter change of the first and second lens position control units 205 and 206 is notified.

  Further, the exposure timing determination unit 213 is a deviation between the lens target position calculated in the first and second lens position control units 205 and 206 and the actual position of the first and second Hall elements 209 and 210, or an imaging unit. An exposure timing signal is generated using the image movement amount from the through image obtained in step 119, and is notified to the imaging unit 109.

  Note that the drive direction of the drive unit is not necessarily limited to the pitch and yaw directions. For example, the correction axis direction may be inclined by a predetermined angle (for example, 45 degrees) while the pitch and yaw shakes are detected. Even if three or more actuators are provided, the correction amount may be calculated so as to correspond to the fluctuation in the pitch and yaw directions. In addition, when the optical path of the photographing optical system is bent, the shake detection direction and the correction axis direction do not necessarily coincide with each other, so that it is possible to take measures before and after the optical path is bent.

(Operation of Image Blur Correction Drive Unit 104)
Next, the drive control operation of the image blur correction lens 103 by the image blur correction drive unit 104 shown in FIG. 2 will be described.

  The first and second image shake correction controllers 203 and 204 are supplied with shake signals (angular velocity signals) representing shakes in the pitch direction and yaw direction of the imaging device from the first and second vibration sensors 201 and 202. . Based on the shake signals, the first and second image shake correction control units 203 and 204 generate correction position control signals for driving the image shake correction lens 103 in the pitch direction and the yaw direction, respectively. The data is output to the position controllers 205 and 206.

  The first and second Hall elements 209 and 210 (position detection units) output a signal having a voltage corresponding to the strength of the magnetic field generated by the magnet provided in the image blur correction lens 103 to the pitch direction of the image blur correction lens 103 and Output as position information in the yaw direction. The position information is supplied to the first and second lens position control units 205 and 206. In the first and second lens position control units 205 and 206, the signal values from the first and second Hall elements 209 and 210 are the corrected position control signal values from the first and second image blur correction control units 203 and 204, respectively. Feedback control is performed while driving the first and second drive units 207 and 208 so as to converge.

  Since the position signal values output from the first and second Hall elements 209 and 210 vary, the image blur correction lens 103 moves to a predetermined position with respect to a predetermined correction position control signal. The output of the first and second Hall elements 209 and 210 is adjusted.

  The first and second image shake correction control units 203 and 204 are correction positions that move the position of the image shake correction lens 103 so as to cancel the image shake based on the shake information from the first and second vibration sensors 201 and 202. Control signals are output respectively. For example, the first and second image blur correction controllers 203 and 204 can generate a corrected position control signal by performing filter processing or the like on shake information (angular velocity signal). With the above operation, even if vibration such as image shake exists in the imaging apparatus during shooting, image shake can be prevented up to a certain level. The first and second image shake correction control units 203 and 204 capture images based on shake information from the first and second vibration sensors 201 and 202 and outputs from the first and second Hall elements 209 and 210. The panning state of the apparatus is detected and panning control is performed.

Further, the pixel shift setting unit 211 sets the pixel shift mode when the photographer sets the pixel shift by the operation unit 117, and instructs the pixel shift control unit 212 to enter the pixel shift mode. The pixel shift control unit 212 notifies the first and second image blur correction control units 203 and 204 and the first and second lens position control units 205 and 206 of an instruction to change the control parameter. (Image blur correction mechanism)
FIG. 3 is an exploded perspective view illustrating a specific configuration example of an image shake correction mechanism corresponding to the image shake correction lens 103, the image shake correction drive unit 104, the aperture / shutter unit 105, and the aperture / shutter drive unit 106.

  The base member 301 is a base of an image blur correction mechanism, and the aperture / shutter unit 105 and the ND filter mechanism are also fixed to the base member 301. The base member 301 is integrally provided with two follower pins 302 and a movable follower pin (not shown), and these three follower pins are fitted into three cam grooves of a cam cylinder (not shown) on the radially outer side of the base member 301. And is configured to advance and retreat in the optical axis direction along the cam groove. The image blur correction lens 103 is held by a holder 316 with a crimping claw (not shown).

  The lens cover 303 includes an opening that restricts the light beam that passes through the image blur correction lens 103. In addition, an opening 305 is provided in each of the three arm portions 304 extending on the side surface, and is held integrally with the holder by fitting with protrusions 315 provided on the three side surfaces of the holder 316. The above-described magnets 312 and 313 are integrally held by the holder.

  The holder 316 is pressed against the base member 301 via three balls 307, and can move in any direction within a plane perpendicular to the optical axis when the balls 307 roll. The configuration in which the holder 316 is held by the ball 307 can realize a vibration with a smaller amplitude and a higher period than the configuration in which the holder is guided by the guide bar. It becomes possible to do.

  The thrust spring 314 is held with one end engaged with the protrusion 315 of the holder 316 and the other end engaged with a protrusion (not shown) of the base member 301 and extended, and the holder 316 is attached toward the base member 301. It is fast. The radial springs 317 and 318 prevent the holder 316 from rotating.

  Metal pins are integrally formed at the ends of the resin bobbins 310 and 311, and the ends of the coils 308 and 309 are entangled. The flexible substrate (FPC) 324 has a land 325 electrically connected to pins of the bobbins 310 and 311 by soldering or the like, and forms a circuit for supplying power to the coils 308 and 309.

  The first and second Hall elements 209 and 210 are disposed in the vicinity of the magnets 312 and 313 and detect the magnetic field generated by the magnets 312 and 313. The first and second Hall elements 209 and 210 are mounted on the FPC 324 and are supplied with power through the FPC 324.

  The FPC 327 forms a circuit for supplying power to the aperture / shutter unit 105 and the ND filter driving unit. The FPCs 324 and 327 are fixed to the holder 320 by the protrusions 321.

(Configuration of image blur correction control unit and position control unit)
FIG. 4 is a block diagram showing an internal configuration of the first image shake correction control unit 203 and the first lens position control unit 205. Note that the second image shake correction control unit 204 and the second lens position control unit 206 have the same internal configuration as 203 and 205, and thus description thereof is omitted.

  4A, an AD converter 401 converts a shake information signal (angular velocity signal) from the first vibration detection sensor 201 into a digital signal. A high-pass filter (HPF) 402 is a filter capable of changing a cutoff frequency for cutting a DC component. A low-pass filter (LPF) 403 is a filter for converting an angular velocity signal into an angle signal. The panning / tilting determination unit 404 detects a panning or tilting operation based on the angular velocity signal from the first vibration detection sensor 201 and the information on the angle target value of the image blur correction lens output from the low-pass filter 403, and the HPF 402 and the LPF 403. Processing such as changing the cutoff frequency so that image blur correction is less effective is performed. For example, when the panning / tilting determination unit 404 detects a panning or tilting operation, the cutoff frequency of the HPF 402 is increased to reduce the followability of the image blur correction so that the image blur correction is less effective. This makes it difficult to perform image blur correction for a user's intentional operation such as panning. The pixel shift setting unit 211 determines from the information of the operation unit 117 whether or not to perform pixel shift, and notifies the pixel shift control unit 212 of the determination. The setting method of the pixel shift setting unit 211 is notified, for example, when the photographer sets to perform pixel shift by a physical switch operation. The pixel shift control unit 212 pans the filter calculation parameters for image blur correction control and shifts the cutoff frequencies of the HPF 402 and LPF 403 high via the tilting determination unit 404 for pixel shift.

  FIG. 4B is a block diagram showing the internal configuration of the lens position control unit. The first and second lens position controllers 205 and 206 have a changeable integral compensator (Ki) 504, a proportional compensator (Kp) 505, and a differential compensator (Kd) 506. The first and second lens position controllers 205 and 206 include delay calculators 503 and 508 and an adder 507. In accordance with a command 502 from the pixel shift controller, the integral compensator coefficient 504 is set to a smaller value than usual when the pixel shift is performed. As described above, when the pixel shift is performed, the cutoff frequency of the HPF 402 and the LPF 403 of the image blur correction control unit is changed to be high, or the integral compensation coefficient Ki504 of the lens position control unit is set to be small in this embodiment. This is because the image blur correction effect is intentionally used, and the image blur correction effect is intentionally weakened to cause the image blur correction.

  After the difference (deviation) between the target position 501 from the first image blur correction control unit 203 and the position information from the first hall element 209 is processed by these PID control units, the first drive is used as a drive signal for the image blur correction lens. Output to the unit 207.

  An image blur correction lens driving operation for pixel shift operation performed in the imaging apparatus configured as described above will be described with reference to FIGS. 5 to 5C and FIGS. 6A to 6E.

  5A to 5C are flowcharts illustrating a procedure of pixel shift driving performed in the imaging apparatus of the present embodiment. FIG. 6 is a diagram illustrating an example of a pixel shift drive command value according to the present embodiment.

  First, when the power of the imaging apparatus is turned on (S101), it is determined whether or not the image blur correction mode is set on by the user with respect to the operation unit 117 (S102). As a result, if the image blur correction mode is set to OFF, the process proceeds to step S103. In step S103, image blur correction control is not performed, and the image blur correction lens is fixed at the optical axis center position. Thereafter, the process proceeds to step S105.

  After shifting to step S105, the state detection of SW1 in which the first switch of the shutter release button is turned on is detected in step 107. When SW1 is off, the state detection determination is repeated until SW1 is turned on. On the other hand, if SW1 is turned on in step S107, the process proceeds to step S108. In step S108, the subject brightness is measured, and the focus state is detected in step S109. In step S110, the image signal accumulation time and aperture control value of the image sensor are calculated according to a predetermined exposure control program diagram.

  In step S111, the pixel shift setting unit 211 determines whether the pixel shift mode for performing imaging by moving the image blur correction lens by a predetermined amount is ON. If it is on, the filter coefficient for calculating the image blur correction control target value and the parameter for lens position control are changed (S112).

  After the counter CNT of the number of stored image signals is initialized to 0 in step S113, the state of the release button SW2 is detected in step S114. When SW2 is off, the process returns to step S108 again, and after various settings are made, the operation is repeated until SW2 is turned on. When SW2 is turned on, it is detected in step S116 whether the position signal of the image blur correction lens is shifted by a predetermined value. When the image blur correction control is OFF, the image blur correction lens is fixed at the center, so that the target value of the image blur correction lens becomes the blur remaining itself. For this reason, when it is detected that the image blur correction lens target position has shifted by a predetermined position (YES in step S116), the image sensor is driven in step S117, charge accumulation of the image sensor, and transfer and reading of the accumulated charge are performed. Take control. Here, exposure using the image blur correction remainder of this embodiment is performed (described later with reference to FIG. 6). That is, by calculating the remaining amount of image blur correction, detecting that the remaining correction amount has shifted by a predetermined value (e.g., corresponding to one pixel pitch), and performing exposure, the same effect as pixel shifting can be obtained.

  In step S118, the image signal read in step S117 is temporarily stored in the storage unit 118. In step S119, the image signal storage number counter CNT is incremented by 1 and updated. In step S120, it is determined whether or not the counter CNT has reached a predetermined number. If the counter CNT has not reached the predetermined value, the process returns to step S115 to continue the pixel shift control.

  When the counter CNT reaches the predetermined number in step S120, the process proceeds to step S121. In step S121, a plurality of image signals obtained by pixel shifting are combined to create one high-definition image. In step S122, the image created in the above step is stored in the memory.

  Thus, the shooting operation is completed, and the process returns to step S105. If the switch SW1 is on in step S107, the subsequent operations are repeated.

  On the other hand, if the pixel shift mode is not ON in step S111, the process proceeds to step S123. In step S123, it is detected whether SW2 is on. If it is off, the process returns to step S108 to continue the subsequent operations. If SW2 is ON in step S123, pixel shifting is not performed, and the image sensor is driven in step S124 as usual, and charge storage of the image sensor, and transfer and readout control of the accumulated charge are performed. In step S125, the image is recorded in the memory, and the shooting operation is terminated.

  The above is an operation flow of pixel shifting when the image blur correction mode is OFF.

  On the other hand, if the image blur correction mode is ON in step S102, the process proceeds to step S104. In step S104, image blur correction control is performed based on the image blur information of the vibration sensors 201 and 202, and the process proceeds to step S106. Since the operation after S106 is almost the same as the operation after S105, only different points will be described.

  When the pixel shift mode is ON in step S111 and the switch SW2 is turned on in step S114, the image blur correction lens for image blur correction is driven. For this reason, the image blur correction blur remaining corresponds to the pixel shift amount, and therefore, the exposure is started by detecting that the image blur correction blur shift is shifted by a predetermined value.

  Next, an example of a pixel shift signal using the image blur correction remainder of this embodiment will be described with reference to FIG. FIG. 6A shows waveforms of the target position and actual lens position of the image blur correction lens during the image blur correction control. FIG. 6B shows the amount of follow-up between the target position of the shake correction lens drive and the actual lens position. If the image shake correction lens completely follows the target position of the image shake correction lens, the angle of view is changed. There is no change. If there is a residual image blur correction as shown in FIG. 6B, this residual correction amount corresponds to the deviation amount of the angle of view. Therefore, by calculating the image blur correction remaining amount, detecting that this correction remaining has shifted by a predetermined value (e.g., corresponding to one pixel pitch), and performing exposure, the same effect as pixel shifting can be obtained. By using the remaining amount of image blur correction in this way, in addition to lens driving for image blur correction as in the past, it is not necessary to simultaneously drive for pixel shifting, and only image blur correction is performed. Thus, a high-definition image can be obtained by shifting pixels.

  FIG. 7 shows an example of an image blur correction remaining signal at the time of panning and tilting shooting. At the time of panning, since the image blur correction target position is commanded beyond the range in which the image blur correction lens can be driven, the remaining image blur correction is a waveform that increases at a constant speed as shown in the figure. Therefore, similar to the above example, by detecting that the image blurring residual signal is shifted by a predetermined value (e.g., corresponding to one pixel) and performing exposure, the same effect as pixel shifting can be obtained.

  By performing the pixel shift using the image blur correction blur residue by the above processing, there is no need for special lens driving for pixel shifting, and the lens driving time for pixel shifting can be suppressed. Therefore, it is possible to accurately capture a high-definition image without degrading the performance.

  In this embodiment, the pixel shift is performed by driving the image blur correction lens as the image blur correction member. However, the pixel shift may be performed by driving an image pickup element as the image blur correction member.

  Although the example provided for the digital camera as the imaging apparatus has been described as the image shake correction apparatus of the present embodiment, a digital video camera may be used. In addition, an optical device such as a lens barrel used for a digital camera, a monitoring camera, or a portable terminal may be used. Further, the present invention can also be used for an image shake correction apparatus for an interchangeable lens for a single lens reflex camera.

Claims (6)

An image shake correction member that corrects image shake on the imaging surface by moving in accordance with the shake;
Control means for controlling the movement of the image blur correction member,
The control unit is configured to match a remaining correction amount of the image shake correction member with the predetermined amount when obtaining a plurality of images while moving the image shake correction member by a predetermined amount according to pixels of the image sensor. An image blur correction device.   The image blur correction apparatus according to claim 1, wherein the predetermined amount is an amount corresponding to a pixel pitch of the image sensor.   Position detection means for detecting the position of the image shake correction member, and the control means is a difference between the position of the image shake correction member detected by the position detection means and a target position of the image shake correction member. 2. The image blur correction apparatus according to claim 1, wherein exposure is controlled to start when the image sensor has a predetermined value. 3.   An optical apparatus comprising the image blur correction device according to claim 1.   An imaging apparatus comprising the image shake correction apparatus according to claim 1. An image shake correction member that corrects image shake on the imaging surface by moving in accordance with the shake;
A method for controlling an image blur correction apparatus having a control means for controlling movement of the image blur correction member,
The control unit includes a step of matching a remaining correction amount of the image shake correction member with the predetermined amount when obtaining a plurality of images while moving the image shake correction member by a predetermined amount in accordance with the pixels of the image sensor. A control method for an image blur correction apparatus.