JP2023094377A - Anti-vibration control device and optical instrument - Google Patents

Abstract

To perform good anti-vibration by using lens anti-vibration and sensor anti-vibration, and preferentially use one of them more advantageous in imaging over the other.SOLUTION: An anti-vibration control device 209 controls the drive of first anti-vibration means that moves a correction optical system 114 to correct image shake, and second anti-vibration means that moves an image pickup device 104 picking up a subject image to correct image shake. The device acquires first information on the amount of movement of an image point with respect to the amount of movement of the correction optical system and second information related to the amount of movement of the image point with respect to the amount of movement of the image pickup device, and sets a correction ratio of the first anti-vibration means and the second anti-vibration means by using first information and second information. The device sets the correction ratio by using different standards according to the magnitude of a difference between the amount of movement of the image point and the amount of movement of the correction optical system and the amount of movement of the image pickup device obtained from the first information and the second information.SELECTED DRAWING: Figure 2

Description

The present invention relates to an anti-vibration control device that controls an anti-vibration function for optically reducing (correcting) image blurring during imaging.

Optical stabilization methods for optically correcting image blur due to camera shake caused by camera shake include a lens shift method (hereinafter referred to as OIS) in which the correction lens is moved along the optical axis, and a lens shift method (hereinafter referred to as OIS) in which the image sensor is positioned along the optical axis. There is a sensor shift method (hereinafter referred to as IIS) in which the sensor is moved with respect to the sensor. Japanese Unexamined Patent Application Publication No. 2002-200000 discloses an imaging apparatus that selectively uses OIS and IIS depending on the imaging mode, power consumption, and the like. .

In a general central projection type optical system, the amount of movement of the image point on the imaging device due to camera shake may differ between the central portion and the peripheral portion in the vicinity of the optical axis. In particular, the wider the angle of view of the optical system, the larger the amount of image point movement in the peripheral area than in the central area. In addition, since many optical systems have distortion aberration, the amount of image point movement differs between the central portion and the peripheral portion due to the difference in the amount of distortion aberration between the central portion and the peripheral portion when image stabilization is performed by IIS. On the other hand, in OIS, eccentric distortion occurs due to eccentricity of the lens, and variations in this eccentric distortion produce a difference in the amount of image point movement between the central portion and the peripheral portion. IIS, which is affected by distortion, and OIS, which is affected by eccentric distortion, differ in the ratio of the amount of image point movement between the central portion and the peripheral portion.

JP 2010-271437 A

When the ratio of the image point movement amount between the central portion and the peripheral portion of each of OIS and IIS is large, preferentially using the one of OIS and IIS that has the smaller image point movement amount in the peripheral portion. The included image quality is advantageous. Conversely, if the ratio of the image point movement amounts of OIS and IIS is small, there is no significant difference in image quality regardless of which one is used.

However, OIS and IIS require different power consumption to correct the same amount of image blurring, and the volume of sound generated by driving differs.

The present invention uses OIS and IIS to perform good image stabilization from the center to the periphery, and allows one of OIS and IIS, which is more advantageous in imaging, to be used with priority over the other. An anti-vibration control device and an imaging device equipped with the same are provided.

An image stabilizing control device as one aspect of the present invention includes first image stabilizing means for correcting image blur by moving a correction optical system that constitutes at least a part of an imaging optical system with respect to an optical axis, and an imaging optical system. and controls the driving of the second image stabilization means for correcting the image blur by moving the image pickup element for picking up the subject image formed by the optical axis. The anti-vibration control device includes acquisition means for acquiring first information regarding an image point movement amount with respect to the movement amount of the correction optical system and second information regarding an image point movement amount with respect to the movement amount of the imaging device; and setting means for setting the correction ratios of the first and second image stabilization means using the information of the second image stabilization means. The setting means sets the correction ratio based on different criteria according to the difference in the amount of movement of the image point with respect to the amount of movement of the correction optical system and the imaging device obtained from the first and second information. do. An optical apparatus including the anti-vibration control device also constitutes another aspect of the present invention.

According to another aspect of the present invention, there is provided an image stabilizing control method comprising: first image stabilizing means for correcting image blur by moving at least a part of a correction optical system of an imaging optical system with respect to an optical axis; This is a method of controlling the drive of a second image stabilization means for correcting image blur by moving an image pickup element that picks up a subject image formed by an optical system with respect to the optical axis. The method comprises the steps of obtaining first information about an image point movement amount with respect to a movement amount of a correction optical system and second information about an image point movement amount with respect to an image pickup device movement amount, and combining the first and second information. and setting the correction ratios by the first and second image stabilization means using the first and second image stabilization means. In the step of setting the correction ratio, correction is performed using different criteria depending on whether the difference in the amount of movement of the image point with respect to the amount of movement of the correction optical system and the imaging device obtained from the first and second information is greater than or less than a predetermined value. It is characterized by setting a ratio. A program that causes a computer to execute processing according to the anti-vibration control method also constitutes another aspect of the present invention.

According to the present invention, the first and second image stabilization means can perform good image stabilization from the central portion to the peripheral portion, and one of the first and second image stabilization means which is more advantageous in imaging is replaced by the other. can be used with priority over

1 is a block diagram showing the configuration of an imaging system according to Embodiment 1. FIG. FIG. 2 is a block diagram showing the configuration of the anti-vibration system according to the first embodiment; FIG. 4 is a flowchart showing anti-vibration control processing according to the first embodiment; 4 is a flowchart showing correction ratio calculation mode setting processing according to the first embodiment; 10 is a flowchart showing correction ratio calculation mode setting processing according to the second embodiment; 4A and 4B are graphs showing examples of vibration isolation sensitivities of OIS and IIS in Example 1. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of an imaging system in Example 1 of the present invention. The imaging system includes an interchangeable lens 101 as a first optical device and a camera body 100 as a second optical device to which the interchangeable lens 101 is detachably and communicatively connected. The camera body 100 has a camera MPU 102 , an operation unit 103 , an image sensor 104 , a camera-side contact terminal 105 , a camera-side gyro sensor 106 , an acceleration sensor 109 and a rear display 116 .

The camera MPU 102 is a controller for overall control of the camera body 100 and the interchangeable lens 101, and controls various operations such as AE, AF, and imaging according to inputs from the operation unit 103, which will be described later. The camera MPU 102 communicates various commands and information with the lens MPU 110 through the camera side contact terminal 105 and the lens side contact terminal 112 provided on the interchangeable lens 101 . The camera-side contact terminal 105 and the lens-side contact terminal 112 also include power terminals for supplying power from the camera body 100 to the interchangeable lens 101 .

The operation unit 103 has a mode dial for setting various imaging modes, a release button for instructing imaging preparation operations and imaging start, and the like. When the release button is pressed halfway, the first switch (SW1) is turned on, and when the release button is fully pressed, the second switch (SW2) is turned on. When SW1 is turned on, AE and AF are performed as imaging preparation operations, and when SW2 is turned on, AE settings are confirmed, AF is stopped, and the like, and an instruction to start imaging (exposure) is issued (SW2 -1 on). After a predetermined time from the instruction, actual exposure is started (SW2-2 is turned on). SW2-1 and SW2-2 are turned off at the timing when the set exposure time has passed and the imaging has ended. The off/on of SW1, SW2-1, and SW2-2 is notified from the camera MPU 102 to the lens MPU 110 through communication.

The imaging device 104 is composed of a photoelectric conversion element such as a CCD sensor or a CMOS sensor, and photoelectrically converts a subject image formed by an imaging optical system, which will be described later, to generate an imaging signal. The camera MPU 102 uses the imaging signal from the imaging device 104 to generate a video signal.

The camera-side gyro sensor 106 is a shake sensor that detects angular shake (camera shake) applied to the camera body 100 due to hand shake or the like and outputs an angular velocity signal as a camera shake detection signal. The camera MPU 102 drives the imaging element actuator 107 based on the angular velocity signal and the IIS correction ratio described later to move the imaging element 104 in a direction perpendicular to the optical axis of the imaging optical system described later. This reduces (corrects) image blur caused by camera shake. At this time, the camera MPU 102 performs feedback control of the image pickup device actuator 107 so that the position of the image pickup device 104 detected by the image pickup device position sensor 108 (the amount of movement from the position on the optical axis, which is the center of movement) approaches the target position. I do. Accordingly, image blur correction by movement of the image sensor 104, that is, sensor stabilization (hereafter referred to as IIS) is performed.

The acceleration sensor 109 is used to detect the orientation of the camera body 100 and to detect shift shake, which is difficult to detect by the camera-side gyro sensor 106, among camera shakes. A rear display 116 as display means displays an image corresponding to an image signal generated by the camera MPU 102 using an imaging signal from the imaging device 104 . Before imaging, the user can observe the displayed image as a finder image (live view image). In addition, after imaging, a still image or moving image for recording generated by imaging can be displayed on the rear display 116 . The term “imaging” used in this embodiment means recording imaging.

The interchangeable lens 101 has an imaging optical system (not shown), the lens MPU 110 , the lens-side contact terminal 112 , and the lens-side gyro sensor 111 described above. The lens-side gyro sensor 111 is a shake sensor that detects angular shake (lens shake) of the interchangeable lens 101 and outputs a lens shake detection signal as an angular velocity signal.

The lens MPU 110 drives a lens actuator 113 based on a lens shake detection signal and an OIS correction ratio, which will be described later, to move a correction lens 114 as a correction optical system constituting at least a part of the imaging optical system to the optical axis of the imaging optical system. move in the direction perpendicular to At this time, the lens MPU 110 performs feedback control of the lens actuator 113 so that the position of the correction lens 114 detected by the lens position sensor 115 (the amount of movement from the position on the optical axis, which is the center of movement) approaches the target position. . Accordingly, image blur correction by movement of the image blur correction lens 114, that is, lens stabilization (hereinafter referred to as OIS) is performed.

The lens actuator 113 and the correcting lens 114 correspond to the first image stabilizing means, and the image sensor actuator 107 and the image sensor 104 correspond to the second image stabilizing means.

FIG. 2 shows the configuration of a vibration isolation system in the imaging system of this embodiment. The anti-vibration system includes a lens anti-vibration control unit 209 that controls the entire anti-vibration system including OIS and IIS as an anti-vibration control device, and a camera anti-vibration control unit 201 that controls the IIS together with the lens anti-vibration control unit 209. have. A lens stabilization control unit 209 is provided in the lens MPU 110 , and a camera stabilization control unit 201 is provided in the camera MPU 102 .

Instead of the lens image stabilization control unit 209, the camera image stabilization control unit 201 may serve as an image stabilization control device to control the entire image stabilization system.

In the camera stabilization control unit 201 , the camera gyro offset removal unit 202 removes the offset component from the angular velocity signal detected by the camera-side gyro sensor 106 mounted on the camera body 100 . The camera-side angle converter 203 converts the angular velocity signal output from the camera gyro offset remover 202 into an angle signal.

The camera information storage unit 204 stores IIS driving information such as the maximum driving amount of the image sensor 104 in IIS, driving characteristics, sound generated by driving (driving sound), power required for driving (power consumption), and IIS sensitivity information. (second information) is stored. The IIS sensitivity information is the amount of movement of the image point for each image height from the center to the periphery near the optical axis on the image pickup surface (hereinafter referred to as image point movement quantity), i.e., information about the anti-vibration sensitivity. The IIS sensitivity information may be information indicating IIS sensitivity itself, or may be information that can be converted to IIS sensitivity. Alternatively, information indicating a function for calculating the IIS sensitivity may be used. The IIS driving information and the IIS sensitivity information are transmitted to the lens stabilization control section 209 via the camera transmission section 205 .

The camera-side cooperative control unit 207 receives information on an IIS correction ratio, which will be described later, from the lens stabilization control unit 209 via the camera reception unit 206, and determines the amount of image blur to be corrected by IIS according to the IIS correction ratio. The image pickup device drive control unit 208 generates an IIS drive signal for driving the image pickup device 104 according to the angle signal from the camera-side angle conversion unit 203 and the IIS correction ratio from the camera-side cooperation control unit 207 . The imaging element actuator 107 that receives the IIS drive signal drives the imaging element 104 in a direction perpendicular to the optical axis. The image sensor drive control unit 208 also has a function of detecting the drive amount of the image sensor 104 being driven (hereinafter referred to as the IIS drive amount).

In the lens vibration reduction control unit 209 , the lens gyro offset removal unit 210 removes the offset component from the angular velocity signal detected by the lens side gyro sensor 111 mounted on the interchangeable lens 101 . The lens side angle converter 211 converts the angular velocity signal output from the lens gyro offset remover 210 into an angle signal.

The lens information storage unit 212 stores OIS drive information such as the maximum drive amount of the correction lens 114 in OIS, drive characteristics, drive sound, and power required for drive, and OIS sensitivity information (first information). there is The OIS sensitivity information is information about the image point movement amount for each image height from the center to the periphery on the imaging plane with respect to a predetermined movement amount (unit movement amount) of the correcting lens 114, that is, information related to image stabilization sensitivity. The OIS sensitivity information may be information indicating the OIS sensitivity itself, information that can be converted to OIS sensitivity, or a function for calculating OIS sensitivity.

Note that the OIS sensitivity information and the IIS sensitivity information are for each image height on the peripheral side of the central portion when the correcting lens 114 and the image sensor 104 are driven to correct a predetermined amount of image blur in the central portion. It may be information indicating the remaining amount of image blurring (remaining amount of correction). Since the remaining amount of image blur is determined by the amount of image point movement, the information indicating the remaining amount of image blur in OIS or IIS is a kind of information related to the amount of image point movement. Also, the OIS sensitivity information and the IIS sensitivity information may be different information depending on the zoom state of the imaging optical system and the position of the focus lens.

A lens-side cooperative control unit (acquisition unit and setting unit) 215 reads OIS drive information and OIS sensitivity information from the lens information storage unit 212, and receives IIS drive information from the camera image stabilization control unit 201 via the lens reception unit 214. and receive IIS sensitivity information. Based on the OIS sensitivity information, the IIS sensitivity information, the IIS drive information, and the OIS drive information, the lens-side cooperative control unit 215 calculates the OIS correction ratio and the IIS correction ratio, which are the ratios of the image blur amounts corrected by OIS and IIS, respectively. Determined by calculating the ratio. At this time, the lens-side cooperative control unit 215 performs correction ratio determination processing, which will be described later. The lens-side cooperative control unit 215 outputs the determined OIS correction ratio to the correction lens drive control unit 216, and also transmits information on the determined IIS correction ratio to the camera anti-shake control unit 201 (camera cooperative control) via the lens transmission unit 213. 207).

Correction lens drive control section 216 generates an OIS drive signal for driving correction lens 114 according to the angle signal from lens side angle conversion section 211 and the OIS correction ratio from lens side cooperative control section 215 . Upon receiving the OIS drive signal, the lens actuator 113 drives the correction lens 114 in a direction perpendicular to the optical axis. The correction lens drive control unit 216 also has a function of detecting the driving amount of the correction lens 114 during driving (hereinafter referred to as OIS driving amount).

The flowchart in FIG. 3 shows image stabilization control processing (image stabilization control method) performed by the lens image stabilization control unit 209 (lens-side cooperative control unit 215) and the camera image stabilization control unit 201 (camera-side cooperative control unit 207). there is The lens stabilization control unit 209 and the camera stabilization control unit 201 as computers execute this process according to a program. S in the figure means a step.

After the imaging system is powered on and the camera MPU 102 and lens MPU 110 perform initial operations, the lens stabilization control unit 209 and the camera stabilization control unit 201 start this processing.

In step 301 , the lens stabilization control unit 209 reads and acquires OIS drive information and OIS sensitivity information from the lens information storage unit 212 and receives IIS drive information and IIS sensitivity information from the camera stabilization control unit 201 . to obtain.

Next, in step 302, the lens stabilization control unit 209 sets a mode for calculating OIS and IIS correction ratios. The details of this processing will be described later.

Next, in step 303, the lens stabilization control unit 209 calculates the OIS correction ratio A based on the correction ratio calculation mode set in step 302, the OIS drive information and sensitivity information, and the IIS drive information and sensitivity information. and the IIS correction ratio (1-A). The OIS correction ratio A may be selected between 0 and 1, or may be 0 or more. When A becomes greater than 1, the OIS overcorrects the shake, and the IIS restores the overcorrection in accordance with (1-A), which is a negative ratio.

Next, in step 304, the lens stabilization control unit 209 drives the OIS according to the OIS correction ratio A calculated. Then, the OIS driving amount is monitored during OIS driving, and if the OIS driving amount reaches the limit driving amount obtained by multiplying the maximum driving amount of the correction lens 114 by the OIS correction ratio A in step 305, step 306 is performed. proceed to

In step 306 , the lens stabilization control unit 209 holds the correction lens 114 at the position of the limited drive amount, sets the IIS correction ratio to 1, and sends it to the camera stabilization control unit 201 . Accordingly, the camera stabilization control unit 201 drives the image sensor 104 within its maximum drive amount range.

On the other hand, in step 307 , the camera stabilization control unit 201 drives IIS according to the IIS correction ratio (1−A) received from the lens stabilization control unit 209 . Then, the IIS drive amount is monitored while the IIS is being driven, and if the IIS drive amount reaches the limit drive amount obtained by multiplying the maximum drive amount of the image sensor 104 by the IIS correction ratio A in step 308, step 309 proceed to

In step 309 , the camera stabilization control unit 201 transmits a request to the lens stabilization control unit 209 to hold the image sensor 104 at the position of the limited drive amount and set the OIS correction ratio to 1. The lens stabilization control unit 209 receiving this sets the OIS correction ratio to 1, and drives the correction lens 114 within its maximum drive amount range.

As described above, in this embodiment, by appropriately setting the OIS and IIS correction ratios based on the information exchanged between the interchangeable lens 101 and the camera body 100, good cooperative image stabilization by OIS and IIS can be achieved. It can be carried out.

The flowchart in FIG. 4 shows the correction ratio calculation mode setting process executed in step 302 in FIG. In step 401, the lens stabilization control unit 209 acquires the stabilization sensitivity for each image height of each of OIS and IIS from the OIS sensitivity information and the IIS sensitivity information. FIGS. 6A and 6B show examples of image stabilization sensitivity for each image height of OIS and IIS. As shown in these figures, the vibration isolation sensitivities of OIS and IIS change according to the image height from the center to the periphery of the imaging surface. FIG. 6A shows an example in which the difference in vibration isolation sensitivity between OIS and IIS is large, and FIG. 6B shows an example in which the difference in vibration isolation sensitivity between OIS and IIS is small.

Next, in step 402, the lens image stabilization control unit 209 determines whether or not the difference Dif in the image stabilization sensitivity between the OIS and IIS in the peripheral portion is greater than a threshold value Thd as a predetermined value. If the difference Dif is greater than the threshold Thd as shown in FIG. 6A, the process proceeds to step 403, and if the difference Dif is less than or equal to the threshold Thd as shown in FIG. 6B, the process proceeds to step 405.

In step 403, the lens stabilization control unit 209 sets the correction ratio calculation mode to the correction residual amount reduction mode. As shown in FIG. 6(a), if IIS is performed when the vibration isolation sensitivity of IIS in the peripheral area is considerably higher than that of OIS, the image point shifts in the peripheral area as compared to the case of OIS. The amount of image blur increases, and the difference between the image point movement amount in the peripheral area and the image point movement amount in the central area remains as the remaining amount of image blur. Therefore, in step 404, the lens stabilization control unit 209 preferentially uses OIS (one stabilization means) over IIS (the other stabilization means). Specifically, an OIS priority drive range (predetermined drive range: a range of a predetermined drive amount smaller than the maximum drive amount) is set. Then, within the priority drive range, the OIS correction ratio is set to 1 and the IIS correction ratio is set to 0, so that only OIS that requires less residual image blur at the periphery than IIS is driven. At this time, the ratio of OIS may be set to 1 or more and the ratio of IIS may be set to 0 or less. Further, outside the priority driving range, the OIS correction ratio is set to be smaller than 1 and larger than 0 to perform cooperative image stabilization by OIS and IIS. Further, when the signs of OIS and IIS are opposite to each other, the OIS and IIS correction ratios may be set according to the ratio of the vibration isolation sensitivities at the periphery.

As described above, when the difference between the image point movement amounts due to OIS and IIS in the peripheral portion is large, the OIS correction ratio and the IIS correction ratio are set based on the criterion of minimizing the remaining amount of image blurring.

In step 405, the lens stabilization control unit 209 determines whether or not the imaging mode of the camera body 100 is set to the image quality priority mode. If the image quality priority mode is set to perform image quality priority imaging in order to obtain a captured image with the best possible image quality, the process proceeds to step 403 to minimize the remaining amount of image blurring in the peripheral portion, and the correction ratio calculation mode is selected. is set to the correction remaining amount reduction mode. In the example shown in FIG. 6B, since the sensitivity of IIS is slightly lower than that of OIS, the lens stabilization control unit 209 controls IIS (one of the stabilization means) in step 404. is preferentially used over OIS (the other anti-vibration means). Specifically, within the priority drive range of IIS, the IIS correction ratio A is set to 1 and the OIS correction ratio is set to 0, and only IIS is driven. Cooperative vibration isolation is performed by IIS and OIS. Within the IIS priority driving range, the IIS correction ratio may be set to 1 or more and the OIS correction ratio may be set to 0 or less.

If the image quality priority mode is not set, the lens stabilization control unit 209 sets the correction ratio calculation mode to the power consumption reduction mode in step 406 . If the difference in image stabilization sensitivity between OIS and IIS in the peripheral area is small, the remaining amount of image blur in the peripheral area is not much different between OIS and IIS, so reduction of power consumption is prioritized.

Then, in step 407, the lens image stabilizing control unit 209 compares the power consumption of OIS and IIS driving obtained from the OIS and IIS driving information, and preferentially uses the one with the smaller power consumption over the other. For example, when the power consumption of IIS is smaller than that of OIS, only IIS is driven with the IIS correction ratio set to 1 within the priority drive range of IIS, and the IIS correction ratio is set to less than 1 and less than 0 outside the priority drive range. By increasing it, cooperative image stabilization is performed by OIS and IIS.

In this way, when the difference between the image point movement amounts due to OIS and IIS in the peripheral portion is small, the OIS correction ratio and the IIS correction ratio are set based on the criterion of minimizing power consumption.

As described above, according to the first embodiment, the OIS and IIS correction ratios are set in accordance with the difference in image stabilization sensitivity between OIS and IIS. Vibration isolation can be performed while suppressing vibration and power consumption.

FIG. 5 shows the correction ratio calculation mode setting process executed in step 302 of FIG. 3 in the second embodiment of the present invention. Steps 501 to 504 are the same as steps 401 to 404 in the first embodiment (FIG. 4), and description thereof will be omitted.

The lens image stabilization control unit 209, having determined in step 502 that the difference Dif is equal to or less than the threshold Thd as shown in FIG. Determine whether or not If the moving image mode is not set (the still image mode is set), the lens stabilization control unit 209 proceeds to step 503 and sets the correction ratio calculation mode to the image blur residual amount reduction mode.

On the other hand, if the moving image mode is set, the lens vibration reduction control unit 209 proceeds to step 506 and sets the correction ratio calculation mode to the drive sound reduction mode. Then, in step 507, the lens image stabilizing control unit 209 compares the drive sound levels of OIS and IIS acquired from the OIS and IIS drive information, and compares one of OIS and IIS with the smaller drive sound to the other. to be used with priority. For example, if the driving sound of IIS is smaller than that of OIS, only IIS is driven with the IIS correction ratio set to 1 within the priority driving range of IIS, and the IIS correction ratio is set to 0.5, which is smaller than 1, outside the priority driving range. , to perform cooperative image stabilization by OIS and IIS.

Thus, when the difference between the image point movement amounts due to OIS and IIS in the peripheral portion is small, the OIS correction ratio and the IIS correction ratio are set based on the criterion of minimizing the drive sound.

As described above, according to the second embodiment, the OIS and IIS correction ratios are set according to the difference between the OIS and IIS image stabilization sensitivities. It is possible to perform image stabilization while suppressing drive sound that becomes noise in image pickup and moving image pickup.

Further, according to each embodiment, OIS and IIS can perform good vibration isolation from the center to the periphery, and it is possible to preferentially use one of OIS and IIS, which is more advantageous in imaging, over the other. can.

In each of the embodiments, a case has been described in which different criteria are used depending on the difference in the amount of image point movement between OIS and IIS in the peripheral area. Alternatively, different criteria may be used depending on the magnitude of the difference in the amount of image point movement in the intermediate portion between the central portion and the peripheral portion.
(Other examples)
The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and one or more processors in the computer of the system or device reads and executes the program. It can also be realized by processing to It can also be implemented by a circuit (for example, ASIC) that implements one or more functions.

Each embodiment described above is merely a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

REFERENCE SIGNS LIST 100 camera body 101 interchangeable lens 104 imaging device 106 camera-side gyro-sensor 111 lens-side gyro-sensor 114 correction lens

Claims (10)

A first image stabilization means for correcting image blur by moving a correction optical system that constitutes at least a part of an imaging optical system with respect to an optical axis, and an imaging device for imaging a subject image formed by the imaging optical system. An anti-vibration control device for controlling the driving of a second anti-vibration means that is moved with respect to an optical axis to correct image blur,
acquisition means for acquiring first information about an image point movement amount with respect to the movement amount of the correction optical system and second information about an image point movement amount with respect to the movement amount of the imaging element;
setting means for setting correction ratios of the first and second image stabilization means using the first and second information;
The setting means sets the correction ratio based on different criteria depending on the magnitude of the difference between the image point movement amounts with respect to the respective movement amounts of the correction optical system and the imaging device obtained from the first and second information. An anti-vibration control device characterized by setting: 2. The anti-vibration control device according to claim 1, wherein said setting means uses said different reference according to the magnitude of the difference in said image point movement amount in a peripheral portion away from said optical axis. When the difference between the image point movement amounts is greater than a predetermined value, the setting means sets the correction ratio of one of the first and second image stabilization means having the smaller image point movement amount. 3. A vibration isolation control device according to claim 1, wherein the correction ratio is set larger than the correction ratio of the other vibration isolation means. When the difference between the image point movement amounts is smaller than a predetermined value, the setting means sets the correction ratio of one of the first and second image stabilization means, which consumes less power when driven, to the other image stabilization means. 4. The anti-vibration control device according to claim 1, wherein the correction ratio is set larger than the correction ratio of the anti-vibration means. When the difference between the image point movement amounts is smaller than a predetermined value, the setting means sets the correction ratio of one of the first and second image stabilization means having a smaller driving sound to the other image stabilization means. 4. The anti-vibration control device according to claim 1, wherein the correction ratio is set larger than the correction ratio of the vibration means. When image quality priority imaging or video imaging is performed when the difference between the image point movement amounts is smaller than a predetermined value, the setting means sets the image point movement amount smaller among the first and second image stabilizing means. 6. A vibration isolation control device according to claim 4, wherein the correction ratio of one vibration isolation means is set to be greater than the correction ratio of the other vibration isolation means. The setting means sets the correction ratio of the other vibration isolating means so that the other vibration isolating means is not driven within a predetermined drive range of the one anti-vibration means, and sets the correction ratio of the one anti-vibration means outside the predetermined drive range. 7. The anti-vibration control device according to claim 4, wherein the correction ratios of the one and the other anti-vibration means are set so that the anti-vibration means and the other anti-vibration means are driven. An optical instrument comprising the anti-vibration control device according to any one of claims 1 to 7. a first anti-vibration means for correcting image blur by moving at least a part of a correction optical system of an imaging optical system with respect to an optical axis; A vibration reduction control method for controlling the driving of a second vibration reduction means that corrects image blur by moving with respect to
obtaining first information about an image point movement amount with respect to the movement amount of the correction optical system and second information about an image point movement amount with respect to the movement amount of the imaging device;
setting a correction ratio by the first and second image stabilization means using the first and second information;
In the step of setting the correction ratio, depending on whether the difference in the amount of movement of the image point with respect to the amount of movement of the correction optical system and the imaging element obtained from the first and second information is larger than or smaller than a predetermined value. An anti-vibration control method, wherein the correction ratios are set according to mutually different criteria. A program for causing a computer to execute processing according to the vibration isolation control method according to claim 9 .

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