JP2016048289A - Imaging apparatus, method for controlling imaging apparatus, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of removing a beat noise between a mechanical vibration generated by the imaging apparatus and an electric noise and a gyro sensor.SOLUTION: An imaging apparatus includes a photographic optical system for forming the optical image of a subject, imaging means for photoelectrically converting the optical image and generating an imaging signal, shake detection means for detecting a vibration applied to the photographic optical system, blur correction means for optically correcting the blur of the optical image on the basis of the output of the shake detection means, first drive control means for controlling the drive of the imaging means, and second drive control means for controlling the drive of the shake detection means and the blur correction means. The second drive control means includes changing means for changing the condition of the drive of the shake detection means, according to the change of the condition of the drive of the imaging means by the first drive control means.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an imaging apparatus, and more particularly to an imaging apparatus having a blur correction function.

  2. Description of the Related Art Conventionally, in an imaging apparatus having a function of correcting image blur caused by typical camera shake, a camera shake detection sensor such as an angular velocity sensor is used to detect the amount of camera shake. Then, based on the camera shake information detected by the camera shake detection sensor, part or all of the photographing optical system is driven to perform image blur correction on the imaging plane. In an image blur correction device, in order to correct image blur caused by vibrations having a frequency distribution similar to that of a camera shake in general, it is necessary to select a shake detection sensor and a shake correction optical system suitable for the correction, and to detect a shake detection sensor, The response frequency band of the drive mechanism is set. For example, Patent Document 1 discloses a gyro sensor unit that can easily remove beat noise without complicating the structure even when a plurality of gyro sensors are provided as shake detection sensors.

JP 2009-186213 A

  In the prior art disclosed in Patent Document 1 described above, when a plurality of gyro sensors are provided, beat noise generated between the gyros can be removed. However, beat noise is generated due to mechanical vibration and electrical noise of the drive actuator and circuit board of the imaging apparatus. For example, when the driving frequency of the angular velocity sensor is 1 kHz and the driving frequency of the driving actuator is 1.001 kHz, the output value of the angular velocity sensor includes 1 Hz which is a frequency difference as beat noise. In addition, since power is supplied to the image sensor at the same cycle as the imaging readout frequency, circuit elements such as capacitors mechanically vibrate at the imaging readout frequency, and the mechanical vibration is transmitted to the angular velocity sensor via the substrate. In this case, the same beat noise occurs.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image pickup apparatus that can eliminate mechanical vibration and electrical noise generated by the image pickup apparatus and beat noise generated between the gyro sensor and the gyro sensor.

  In order to achieve the above object, according to the present invention, an imaging apparatus includes: an imaging optical system that forms an optical image of a subject; an imaging unit that photoelectrically converts the optical image to generate an imaging signal; and an imaging optical system. A shake detection unit that detects applied vibration, a shake correction unit that optically corrects a shake of an optical image based on an output of the shake detection unit, a first drive control unit that controls driving of the imaging unit, and a shake And a second drive control means for controlling the drive of the detection means and the shake correction means. The second drive control means is configured to detect the shake detection means according to a change in the driving conditions of the imaging means by the first drive control means. It has a change means which changes the conditions of a drive.

  ADVANTAGE OF THE INVENTION According to this invention, the imaging device which enables the removal of the beat noise which generate | occur | produces between the mechanical vibration and electrical noise which an imaging device generate | occur | produce, and a gyro sensor can be provided.

It is a block diagram which shows the structure of the imaging device concerning the Example of this invention. It is a block diagram which shows the structure of the shift lens drive control part in the imaging device concerning the Example of this invention. It is a block diagram which shows the structure of the blur detection part in the imaging device concerning the Example of this invention. It is a block diagram which shows the structure of the image stabilization control in the imaging device concerning the Example of this invention. It is a figure which shows an example of the vibrator | oscillator which a shake detection part has. It is a figure which shows the relationship between the drive frequency and drive speed of the vibrator which a shake detection part has. It is a figure which shows the flowchart of imaging | photography operation | movement in the imaging device which concerns on the Example of this invention. It is a figure which shows the flowchart of imaging | photography operation | movement in the imaging device which concerns on the Example of this invention. It is a figure which shows the flowchart of imaging | photography operation | movement in the imaging device which concerns on the Example of this invention.

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

FIG. 1 is a block diagram illustrating a configuration of an imaging apparatus according to an embodiment of the present invention.
In FIG. 1, the imaging apparatus includes a zoom unit 101 including a zoom lens that performs zooming, and a zoom drive control unit 102 that drives and controls the zoom unit 101. The imaging apparatus also includes a shift lens (IS (image stabilization) unit) 103 as a movable optical correction unit, and a shift lens drive control unit 104 that drives and controls the shift lens 103. The shift lens is a shake correction optical system that can move in a plane orthogonal to the optical axis. Note that the zoom drive control unit 102 and the shift lens drive control unit 104 stop supplying drive power to the zoom unit 101 and the shift lens 103, for example, during power saving.

  The imaging apparatus further includes a diaphragm / shutter unit 105 that performs a diaphragm operation and a shutter operation of the photographing optical system, and a diaphragm / shutter drive control unit 106 that drives and controls the diaphragm / shutter unit 105. Further, it includes a lens that performs focus adjustment, and includes a focus unit 107 that performs focus adjustment, and a focus drive control unit 108 that drives and controls the focus unit 107. Furthermore, an imaging unit 109 including an imaging element that converts an optical image of a subject formed by the lens group of the photographing optical system into an electrical signal by photoelectric conversion is provided.

  The conversion process of the electrical signal output from the imaging unit 109 into the image signal is performed by the imaging signal processing unit 110, and the processing according to the use of the image signal output from the imaging signal processing unit 110 is performed by the image signal processing unit 111. Done in In the imaging apparatus according to the present embodiment, the display unit 112 including a display displays an image as necessary based on the signal output from the image signal processing unit 111.

  The image pickup apparatus according to the present embodiment includes a power supply unit 113 that supplies power to the entire image pickup apparatus according to applications, and an external input / output terminal unit 114 for inputting / outputting communication signals and image signals to / from the outside. And an operation unit 115 for operating the imaging apparatus. Various data such as image information obtained by shooting is stored in the storage unit 116, and the control of the entire imaging apparatus is performed by the control unit 117. The control unit 117 reads out and executes a control program stored in a memory (not shown), thereby controlling each unit of the imaging apparatus and executing a photographing operation according to the present embodiment described later.

  Next, an operation according to the present embodiment in the imaging apparatus configured as described above will be described. The operation unit 115 has a shutter release button (not shown) configured so that the first switch (SW1) and the second switch (SW2) are sequentially turned on according to the amount of pressing. The first switch (SW1) is turned on when the shutter release button is depressed approximately halfway, and the second switch (SW2) is turned on when the shutter release button is depressed to the end.

  When the first switch (SW1) is turned on, the focus drive control unit 108 drives the focus unit 107 to perform focus adjustment, and the aperture / shutter drive control unit 106 drives the aperture / shutter unit 105 to perform exposure. Set the volume appropriately. When the second switch (SW2) is turned on, an optical image formed by the lens group of the photographing optical system is exposed to the imaging unit 109, and an image obtained based on an electrical signal photoelectrically converted by the imaging element. Data is stored in the storage unit 116.

  At this time, if there is an instruction to turn on the image stabilization from the operation unit 115, the control unit 117 instructs the shift lens drive control unit 104 to perform the image stabilization operation, and the shift lens drive control unit 104 that has received this instruction Anti-vibration operation is performed until the instruction is given. In addition, when the operation unit 115 has not been operated for a certain period of time, the control unit 117 issues an instruction to shut off the power source of the display included in the display unit 112 for power saving.

  In addition, the imaging apparatus according to the present exemplary embodiment can be selected by operating the operation unit 115 using either the still image shooting mode or the moving image shooting mode as the shooting mode. In each shooting mode, the operating conditions of each actuator (movable element) constituting the imaging apparatus can be changed.

  When an instruction for zooming with a zoom lens is input via the operation unit 115, the zoom drive control unit 102 that has received the instruction via the control unit 117 drives the zoom unit 101 to indicate the zoom position indicated. Move the zoom lens to. Further, based on the image information processed by the imaging signal processing unit 110 and the image signal processing unit 111, the focus drive control unit 108 drives the focus unit 107 to perform focus adjustment.

  FIG. 2 is a block diagram illustrating a configuration of the shift lens drive control unit 104. In the figure, parts similar to those in FIG.

  As illustrated, the shift lens drive control unit 104 includes a pitch direction blur detection unit 201a and a yaw direction blur detection unit 201b as a blur detection unit that detects vibration applied to the imaging apparatus (a plurality of detection axes). The pitch direction blur detection unit 201a detects a blur in the vertical direction (pitch direction) of the imaging apparatus in a normal posture (a posture in which the length direction of the image frame substantially matches the horizontal direction), and the yaw direction blur detection unit 201b A shake in the horizontal direction (yaw direction) of the imaging apparatus in the normal posture is detected.

  Based on the shake signal of the pitch direction blur detection unit 201a, the image stabilization control unit 202a calculates a shift lens correction position control signal in the pitch direction. Similarly, the image stabilization control unit 202b calculates a shift lens correction position control signal in the yaw direction based on the shake signal from the yaw direction blur detection unit 201b. A magnet is attached to the shift lens 103, and the position detectors 205a and 205b are position detection means for detecting the position of the shift lens 103 in the pitch direction and the yaw direction by detecting the magnetic field of the magnet with a Hall element. .

  The PID unit 203a and the PID unit 203b as feedback control means obtain control amounts from the deviations between the shift lens correction position control signals of the image stabilization control units 202a and 205b and the position signals of the position detection units 205a and 205b, respectively. A command signal is output. The drive unit 204a and the drive unit 204b are drive units that drive the shift lens 103 based on drive command signals sent from the PID units 203a and 203b, respectively. In this way, the PID units 203a and 203b perform feedback control so that the position signals from the position detection units 205a and 205b converge on the corrected position control signals respectively transmitted from the image stabilization control units 202a and 202b.

  Further, the shift lens correction position control signal in the pitch direction of the image stabilization control unit 202a calculated based on the shake signal from the pitch direction blur detection unit 201a is a signal representing the movement target position (blur correction position) in the pitch direction. . Similarly, the shift lens correction position control signal in the yaw direction of the image stabilization control unit 202b calculated based on the shake signal from the yaw direction blur detection unit 201b is a signal representing the movement target position (blur correction position) in the yaw direction. is there.

  Therefore, the position of the shift lens 103 is moved in the direction of correcting the image blur due to the blur of the imaging device by the shift lens correction position control signal output from the image stabilization controllers 202a and 202b. In this way, even if the shift lens 103 that performs shake correction moves in the vertical and horizontal directions orthogonal to the optical axis and a camera shake or the like occurs in the imaging apparatus, image blur can be prevented.

  FIG. 3 shows the configuration of an angular velocity sensor as an example of the shake detection unit. The drive voltage application unit 301 applies a voltage to the vibrator 303 and drives the vibrator at a desired frequency. The adjustment voltage application unit 302 makes the drive frequency of the vibrator 303 variable by instructing a change in the frequency of the voltage applied to the vibrator 303. The vibrator 303 is vibrated by the voltage of the drive voltage application unit 301, and generates a Coriolis force when it receives an angular velocity in this state. The generated Coriolis force is amplified by the signal amplifying unit 304 and converted into a DC voltage proportional to the angular velocity by the processing unit 305. Specifically, synchronous detection of the driving frequency signal of the vibrator and the Coriolis force is performed, and a signal in which a voltage proportional to the generated angular velocity and the driving frequency are superimposed is generated and smoothed by the LPF 306 to be proportional to the angular velocity. DC voltage is obtained.

  FIG. 5 shows the relationship among the driving direction of the vibrator, the angular velocity direction, and the Coriolis force generation direction. When the vibrator having the mass m vibrates at the speed V in the driving direction, when the vibrator rotates at the angular velocity ω around the central axis, a Coriolis force of F = 2 mV × ω is generated in the vibrator. The angular velocity can be detected by detecting the Coriolis force and performing the signal processing described above. Although a rectangular parallelepiped vibrator is shown as an example, vibrators of other shapes such as a tuning fork shape and a comb tooth shape may be used.

  FIG. 6 shows the relationship between the drive frequency and drive speed of the vibrator. As shown in the figure, the drive speed of the vibrator changes according to the drive frequency of the vibrator. This means that when the driving frequency of the vibrator is changed, the Coriolis force is changed and the output sensitivity of the gyro sensor is changed.

  FIG. 4 is a block diagram showing a configuration of the image stabilization control unit 202. When a shake is detected by the shake detection means 201 that is an angular velocity sensor that detects shake information, the analog amplifier 401 that is a signal amplification means amplifies the shake signal at a specific magnification. The amplified shake signal is converted into a digital signal by the A / D conversion means 402, and then the digital value is amplified by the digital amplifier 403 that amplifies the digital value. Next, the amplified digital signal is processed by a digital high-pass filter (hereinafter, HPF) 404 and a digital low-pass filter (hereinafter, LPF) 405, which are digital filter means capable of changing cut-off to pass a predetermined frequency. After the filtered blur signal is converted into a target position of the actual shift lens driving amount by the blur correction amount calculation unit 406, a control amount is calculated by the PID unit 203 from the current position and the target position of the shift lens. In accordance with this control amount, a blur correction unit that is a shift lens for correcting image blur is driven.

  The angular velocity sensor drive frequency control unit 407 changes the drive frequency of the angular velocity sensor 201 according to the output state of the imaging readout frequency control unit 408 that controls the readout frequency of the imaging element of the imaging unit 109. In the present embodiment, the driving frequency of the angular velocity sensor is changed so that the reading frequency of the image sensor and the driving frequency of the angular velocity sensor are separated from each other by a predetermined frequency or more. Here, the function of the imaging readout frequency control unit 408 may be provided to the control unit 117.

  Further, the angular velocity sensor drive frequency control unit 407 changes the drive frequency of the angular velocity sensor 201 according to the output state of the actuator control unit 409 that controls the actuator drive frequency of the imaging apparatus. The actuator control unit 409 controls actuator drive frequencies of the zoom drive control unit 102, the shift lens drive control unit 104, the aperture / shutter drive control unit 106, the focus drive control unit 108, and the like. Also in this case, the driving frequency of the angular velocity sensor is changed so that the driving frequency of each actuator and the driving frequency of the angular velocity sensor are separated from each other by a predetermined frequency or more. Here, the function of the actuator control unit 409 may be provided to the control unit 117.

  As described above, the output sensitivity of the angular velocity sensor changes due to the change of the driving frequency of the angular velocity sensor. Therefore, the angular velocity sensor drive frequency control unit 407 adjusts the digital amplifier 403 to compensate for the influence of the change in the output sensitivity of the angular velocity sensor accompanying the change in the angular velocity sensor drive frequency with respect to the signal processing after the HPF 404.

  In the present embodiment, the analog interface angular velocity sensor has been described as an example, but a digital interface angular velocity sensor can obtain the same effect.

  Next, a photographing operation including a changing operation of the angular velocity sensor driving frequency in the imaging apparatus according to the present embodiment will be described with reference to the flowchart shown in FIG. FIG. 7 is a flowchart illustrating the photographing operation in the imaging apparatus according to the embodiment. The shooting operation according to the flowchart is realized by the control unit 117 executing a control program stored in the memory (not shown) to control each unit of the imaging apparatus.

  First, in step S701, when the camera is turned on, it is determined in step S702 whether to change the imaging readout cycle. When the imaging readout cycle is changed, the process proceeds to step S703 and the imaging readout cycle is changed. If the imaging readout cycle is not changed, the process proceeds to step S704. In step S704, it is determined whether there is interference between the imaging readout cycle and the angular velocity sensor drive frequency. If there is interference, the process proceeds to step S705 to change the driving frequency of the angular velocity sensor (described later). When the driving frequency of the angular velocity sensor is changed, the sensitivity of the angular velocity sensor also changes. At the same time, the amplification factor of the digital amplifier 403 is changed. If there is no interference, the process proceeds to step S706.

  In step S706, it is determined whether to change the actuator drive frequency. When changing the actuator driving frequency, the actuator driving frequency is changed in step S707. If the actuator drive frequency is not changed, the process proceeds to step S708. In step S708, it is determined whether there is interference between the actuator drive frequency and the angular velocity sensor drive frequency. If there is interference, the driving frequency of the angular velocity sensor is changed (described later) in step S709. If the driving frequency of the angular velocity sensor is changed, the sensitivity of the angular velocity sensor also changes. At the same time, the gain of the digital amplifier 403 is adjusted. If there is no interference, the process proceeds to step S710.

  In step S710, when the second switch is pressed, the process proceeds to step S711 to execute an exposure operation. If the second switch has not been pressed, the process returns to step S702 to repeat the above flow.

Next, the change of the driving frequency of the angular velocity sensor in step S705 will be described using the flowchart shown in FIG. FIG. 8 is a diagram illustrating a flowchart of the operation of changing the driving frequency of the angular velocity sensor according to the change of the driving frequency of the image sensor in the shooting operation of the imaging apparatus according to the present embodiment. Each symbol shown in the figure represents the following contents.
X: Driving frequency of angular velocity sensor X ′: Driving frequency of angular velocity sensor of other detection axis A: Imaging readout frequency α: Variation of angular velocity sensor driving frequency α ′: Variation of angular velocity driving frequency of other detection axes β: Imaging readout Lower limit value of difference between frequency and angular velocity frequency γ: Lower limit value of difference in driving frequency between multiple axes of angular velocity sensor

  First, in step S801, the imaging readout frequency A to be changed is equal to or less than the current angular velocity sensor driving frequency X and is greater than the frequency considering the variation in angular velocity sensor driving frequency and the lower limit of the difference between the imaging readout frequency and the angular velocity frequency. Judge whether or not. At this time, the lower limit value of the difference between the imaging readout frequency and the angular velocity frequency is set to a value that eliminates the occurrence of beat noise or a value that does not affect the shooting operation even if beat noise occurs. As a result of the determination, if applicable (Yes), it is determined that the imaging readout frequency to be changed interferes with the driving frequency of the angular velocity sensor, and the process proceeds to step S802, and the change of the driving frequency of the angular velocity sensor is shown in FIG. Follow the instructions. If the result of determination is not applicable (No), processing proceeds to step S805. In step S805, it is determined whether the imaging readout frequency to be changed is greater than the current angular velocity sensor driving frequency, and is less than or equal to the frequency considering the variation in angular velocity sensor driving frequency and the lower limit of the difference between the imaging readout frequency and the angular velocity frequency. . As a result of the determination, if applicable (Yes), it is determined that there is an interference between the imaging readout frequency to be changed and the driving frequency of the angular velocity sensor, and the process proceeds to step S806. Do. If the result of determination is not applicable (No), it is determined that there is no interference between the imaging readout frequency to be changed and the driving frequency of the angular velocity sensor, and the process ends.

  By the determination process, the angular frequency sensor drive frequency is changed so that the difference between the current and changed angular velocity sensor driving frequency is reduced. In this embodiment, the difference between the current and changed angular velocity sensor drive frequency is determined based on the lower limit value β of the difference between the imaging readout frequency and the angular velocity frequency.

  In step S803, the angular velocity sensor driving frequency set in step S802 is compared with the angular velocity sensor driving frequency of the other axis. The frequency that takes into account the variation of the set current angular velocity sensor drive frequency and angular velocity sensor drive frequency is greater than the frequency that takes into account the angular velocity sensor drive frequency of other detection axes and the angular velocity sensor drive frequency variation of other detection axes. Judge by comparing whether there is. If the result of the determination is yes (Yes), it is determined that there is interference with the angular velocity sensor driving frequency of the other detection axis, and the process proceeds to step S804, where the driving frequency of the angular velocity sensor of the other detection axis is changed. Follow the instructions.

  In step S807, the angular velocity sensor driving frequency set in step S806 is compared with the angular velocity sensor driving frequencies of other detection axes. Whether the set drive frequency of the current angular velocity sensor and the variation considering the angular velocity sensor drive frequency variation are less than the frequency considering the angular velocity sensor drive frequency of other detection axes and the angular velocity sensor drive frequency variation of other detection axes Judge by comparing. If the result of the determination is yes (Yes), it is determined that there is interference with the angular velocity sensor drive frequency of the other detection axis, and the process proceeds to step S808 to illustrate the change of the drive frequency of the angular velocity sensor of the other detection axis. Follow the formula.

Next, the change of the driving frequency of the angular velocity sensor in step 709 will be described using the flowchart shown in FIG. FIG. 9 is a diagram illustrating a flowchart of the operation of changing the driving frequency of the angular velocity sensor in accordance with the change of the driving frequency of the image sensor in the photographing operation of the imaging apparatus according to the present embodiment. Each symbol shown in FIG. 9 represents the following contents.
X: Angular velocity sensor driving frequency X ′: Angular velocity sensor driving frequency of other detection axes B: Actuator driving frequency α: Angular velocity driving frequency variation α ′: Angular velocity driving frequency variation of other detection axes δ: Actuator driving Lower limit value of difference between frequency and angular velocity frequency γ: Lower limit value of difference in driving frequency between multiple axes of angular velocity sensor

  In step S901, whether or not the actuator drive frequency B to be changed is less than or equal to the current angular velocity sensor drive frequency X and greater than the frequency considering the variation in the angular velocity sensor drive frequency and the lower limit of the difference between the actuator drive frequency and the angular velocity frequency Judgment is made. At this time, the lower limit value of the difference between the actuator drive frequency and the angular velocity frequency is set to a value that eliminates the occurrence of beat noise or a value that does not affect the photographing operation even if beat noise occurs. As a result of the determination, if applicable (Yes), it is determined that the actuator driving frequency to be changed has an interference with the driving frequency of the angular velocity sensor, and the process proceeds to step S902. Do. As a result of the determination, if not applicable (No), the process proceeds to step S905. In step S905, it is determined whether the actuator drive frequency to be changed is greater than the current angular velocity sensor drive frequency, and is less than or equal to a frequency that takes into account variations in the angular velocity sensor drive frequency and the lower limit of the difference between the actuator drive frequency and the angular velocity frequency. . If the result of determination is yes (Yes), it is determined that the actuator drive frequency to be changed has an interference with the drive frequency of the angular velocity sensor, and the process proceeds to step S906, where the change of the drive frequency of the angular velocity sensor is illustrated. Follow the instructions. If the result of determination is not applicable (No), it is determined that there is no interference between the actuator drive frequency to be changed and the drive frequency of the angular velocity sensor, and the process is terminated.

  By the determination process, the angular frequency sensor drive frequency is changed so that the difference between the current and changed angular velocity sensor driving frequency is reduced. In this embodiment, the difference between the current and changed drive frequencies of the angular velocity sensors of the other detection axes is determined based on the lower limit value δ of the difference between the actuator drive frequency and the angular velocity frequency.

  In step S903, the driving frequency of the angular velocity sensor set in step S902 is compared with the driving frequency of the angular velocity sensor of the other axis. The frequency that takes into account the variation of the set current angular velocity sensor drive frequency and angular velocity sensor drive frequency is greater than or equal to the frequency that takes into account the variation of angular velocity sensor drive frequency of other detection axes and angular velocity sensor drive frequency of other detection axes It is determined by comparing whether or not. If the result of the determination is yes (Yes), it is determined that there is interference with the angular velocity sensor driving frequency of the other detection axis, and the process proceeds to step S904 to illustrate the change of the driving frequency of the angular velocity sensor of the other detection axis. Follow the formula.

  In step S907, the angular velocity sensor driving frequency set in step S906 is compared with the angular velocity sensor driving frequencies of the other detection axes. The frequency that takes into account the variation of the current angular velocity sensor drive frequency and the angular velocity sensor drive frequency that is set is less than the frequency that takes into account the variation of the angular velocity sensor drive frequency of the other detection axes and the angular velocity sensor drive frequency of the other detection axes It is determined by comparing whether or not. If the result of the determination is yes (Yes), it is determined that there is interference with the angular velocity sensor driving frequency of the other detection axis, and the process proceeds to step S908 to illustrate the change of the driving frequency of the angular velocity sensor of the other detection axis. Follow the formula. Also in this case, the driving frequency of the angular velocity sensor of the other detection axis is changed so that the difference between the driving frequency of the angular velocity sensor of the other detection axis after the change becomes small. In the present embodiment, the difference between the current and changed drive frequencies of the angular velocity sensors of the other detection axes is determined based on the lower limit value γ of the drive frequency difference between the multiple axes of the angular velocity sensors.

  As described above, in the present invention, when the operation mode of the imaging apparatus, in particular, the driving condition (driving frequency) of the imaging element and other components is changed, the blur of the blur correction unit is determined according to the changed condition information. The driving condition of the detection element is changed under a predetermined condition. As a result, it is possible to provide an imaging apparatus capable of removing mechanical vibration and electrical noise generated by the imaging apparatus and beat noise generated between the angular velocity sensor.

  Further, in the processing of the above-described embodiment, a storage medium in which a program code of software that embodies each function is recorded may be provided to the system or apparatus. The functions of the above-described embodiments can be realized by the computer (or CPU or MPU) of the system or apparatus reading out and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. As a storage medium for supplying such a program code, for example, a floppy (registered trademark) disk, a hard disk, an optical disk, a magneto-optical disk, or the like can be used. Alternatively, a CD-ROM, CD-R, magnetic tape, nonvolatile memory card, ROM, or the like can be used.

  The functions of the above-described embodiments are not only realized by executing the program code read by the computer. Including the case where the OS (operating system) running on the computer performs part or all of the actual processing based on the instruction of the program code, and the functions of the above-described embodiments are realized by the processing. It is.

  Further, the program code read from the storage medium may be written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. After that, the CPU of the function expansion board or function expansion unit performs part or all of the actual processing based on the instruction of the program code, and the functions of the above-described embodiments are realized by the processing. Is also included.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

Claims (12)

A photographing optical system for forming an optical image of a subject;
Imaging means for photoelectrically converting the optical image to generate an imaging signal;
Shake detecting means for detecting vibration applied to the photographing optical system;
Based on the output of the shake detection means, the shake correction means for optically correcting the shake of the optical image;
First drive control means for controlling drive of the imaging means;
Second drive control means for controlling the drive of the shake detection means and the shake correction means;
With
The second drive control means includes an changing means for changing the driving condition of the blur detecting means in accordance with a change in driving condition of the imaging means by the first driving control means. apparatus.   The condition is a driving frequency, and the changing unit sets the driving frequency of the shake detecting unit to a driving frequency having a predetermined relationship with the driving frequency of the imaging unit changed by the first driving control unit. The imaging apparatus according to claim 1, wherein the imaging apparatus is changed.   Third driving control means for controlling driving of the photographing optical system is provided, and the changing means drives the blur detecting means in accordance with the change of the condition of driving of the photographing optical system by the third driving control means. The imaging apparatus according to claim 1, wherein the condition is changed.   The imaging apparatus according to claim 3, wherein the change unit changes the drive frequency of the shake detection unit so that a difference between the drive frequency before and after the change is small.   The difference between the drive frequency before and after the change is a value based on a lower limit value of a difference between the drive frequency of the imaging unit and the drive frequency of the shake detection unit. Imaging device.   The second drive control means has means for adjusting the output sensitivity of the shake detection means, and the change means changes the output sensitivity to the shake detection means when changing the drive frequency of the shake detection means. The imaging apparatus according to claim 3, wherein adjustment is performed according to the changed driving frequency.   The shake detection means has a plurality of detection axes for detecting vibrations, and the change means has a drive frequency of the shake detection means according to a change in the drive frequency of the imaging means for any of the plurality of detection axes. The imaging apparatus according to any one of claims 3 to 6, wherein when the frequency is changed, a driving frequency related to another detection axis is changed based on the changed driving frequency.   The blur correction unit includes a shift lens that moves in a plane orthogonal to the optical axis of the photographing optical system, and the photographing optical system includes a zoom unit, a diaphragm / shutter unit, a focus unit, and the shift lens. The third drive control means includes a drive control means for controlling the drive of the zoom unit, a drive control section for controlling the drive of the aperture / shutter unit, and a drive control section for controlling the drive of the focus unit. And a drive control unit that controls the drive of the shift lens, and the change unit changes the drive frequency of the shake detection unit according to the change of the drive frequency by each drive control unit of the third drive control unit. The image pickup apparatus according to claim 3, wherein the image pickup apparatus is an image pickup apparatus.   9. The shake detecting unit is an angular velocity sensor that detects an angular velocity of vibration applied to the photographing optical system, and the changing unit changes a driving frequency of a vibrator of the angular velocity sensor. The imaging device according to any one of the above. An imaging apparatus control method comprising: an imaging optical system that forms an optical image of a subject; an imaging unit that photoelectrically converts the optical image to generate an imaging signal; and a shake detection unit that detects vibration applied to the imaging optical system And
A blur correction step for optically correcting blur of the optical image based on the output of the blur detection means;
A first drive control step for controlling the drive of the imaging means;
A second drive control step for controlling the drive of the shake detection means and the shake correction step;
With
The second drive control step includes a changing step of changing the condition of driving of the shake detecting unit in accordance with a change of the driving condition of the imaging unit in the first drive control step. Method. An imaging apparatus control method comprising: an imaging optical system that forms an optical image of a subject; an imaging unit that photoelectrically converts the optical image to generate an imaging signal; and a shake detection unit that detects vibration applied to the imaging optical system In the computer,
A blur correction unit that optically corrects a blur of the optical image based on an output of the blur detection unit;
First drive control means for controlling drive of the imaging means;
Second drive control means for controlling the drive of the shake detection means and the shake correction means;
In the drive control by the second drive control means, a program that functions as means for changing the condition for driving the blur detection means in accordance with a change in the drive condition for the imaging means by the first drive control means.   A computer-readable storage medium storing the program according to claim 11.

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