JP2006064776A - Optical equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide optical equipment capable of obtaining a natural output image even when sampling a shake signal to be added in a different cycle. <P>SOLUTION: The optical equipment has a signal generation means 105 generating a control signal for controlling a correction means 4 for correcting image blur by adding the 1st shake signal generated based on output from a detection means 1 for detecting vibration and a 2nd shake signal showing the movement of a generated image by using a photoelectric conversion element 17. The signal generation means adds the 2nd shake signal to the 1st shake signal in the cycle corresponding to the generation cycle of the 1st shake signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical apparatus such as a video camera or an interchangeable lens, and more particularly to an optical apparatus having an image blur correction function.

  Optical devices often have an image blur correction function for correcting image blur due to vibration. FIG. 8 shows a configuration example of an imaging apparatus having an image blur correction system using an output from an angular velocity sensor and an image motion vector. (See Patent Documents 1 and 2).

  In FIG. 8, reference numeral 301 denotes an angular velocity sensor (gyro sensor), which detects a physical shake of the imaging apparatus. Reference numeral 302 denotes a DC cut filter that blocks the direct current component of the output signal from the gyro sensor 301 and passes only the alternating current component, that is, the vibration component.

  An amplifier 303 amplifies the angular velocity signal output from the DC cut filter 302 to an appropriate level. Reference numeral 312 denotes a gyro signal processing unit for converting the output signal of the amplifier 303 into an angular displacement signal as a shake signal.

  Reference numeral 317 denotes an image sensor that photoelectrically converts a subject image formed by the photographing optical system. An output signal (photoelectric conversion signal) from the image sensor 317 is input to the video signal processing circuit 318. The video signal processing circuit 318 performs various processes on the input photoelectric conversion signal to generate a video signal. A motion vector detection unit 315 detects a motion vector of the video based on the video signal output from the video signal processing circuit 318.

  The angular displacement signal and the motion vector signal are added by an adder 313 and input to the phase / gain compensation unit 311 as a shake correction control signal. The shake correction control signal processed by the phase and gain compensation unit 311 is input to the drive circuit 308 that drives the image shake correction unit 200.

In such an image blur correction system using the output of an angular velocity sensor and a motion vector, by combining an angular velocity sensor suitable for detecting a shake in a high frequency range and a motion vector suitable for detecting a shake in a low frequency range, It is possible to detect a wide-range shake and correct an image shake.
JP-A-4-163533 (page 2, lower left column, line 13 to page 4, upper left column, line 14, FIG. 1, etc.) Japanese Patent Laid-Open No. 10-322584 (paragraphs 0029 to 0039, FIG. 1, etc.)

  However, the output from the above-described angular velocity sensor is an analog signal and is generally vulnerable to external noise. For this reason, there is a problem in that the image blur correction system as a whole using the output of the angular velocity sensor and the motion vector has low reliability against external noise.

  In the conventional image stabilization system, the sampling frequency of the angular velocity signal is several kHz (for example, 2 kHz), whereas the sampling frequency of the motion vector is a frequency (for example, a frequency corresponding to the charge accumulation and readout frequency in the image sensor). The NTSC system is set to 60 Hz, and the PAL system is set to 50 Hz. That is, the angular velocity signal and the motion vector generation period are greatly different. For this reason, if the shake signals obtained at these different sampling periods are added as they are, fluctuations in the added signal may increase, and as a result, the output video that has undergone image blur correction moves unnaturally.

  An object of the present invention is to provide an optical apparatus that can perform image blur correction with high reliability against external noise and capable of dealing with a wide-range blur. Furthermore, an object of the present invention is to provide an optical apparatus that can obtain a natural output image even when a shake signal to be added is sampled at different periods.

  As one aspect, the optical apparatus according to the present invention is configured to detect a motion of an image generated using a first shake signal that is an analog signal generated based on an output from a detection unit that detects vibration and a photoelectric conversion element. A signal generation unit that generates a control signal for controlling a correction unit that corrects image blur by adding a second shake signal that is a digital signal. The signal generating means converts the first shake signal into a digital signal and adds it to the second shake signal.

  Another aspect of the optical apparatus of the present invention is a first shake signal generated based on an output from a detection means for detecting vibration and a motion of an image generated using a photoelectric conversion element. And a signal generation means for generating a control signal for controlling the correction means for correcting the image shake by adding the two shake signals. The signal generating means adds the second shake signal to the first shake signal at a period corresponding to the generation period of the first shake signal.

  According to the present invention, since the first shake signal that is an analog signal is converted into a digital signal and then added to the second shake signal that is a digital signal, the process is highly reliable, It is possible to realize an optical apparatus that can perform image blur correction that can cope with blur in a wide band.

  Further, according to the present invention, even when the added shake signal is sampled at different periods, the second shake signal converted so as to be substantially synchronized with the generation period of the first shake signal is used as the first shake signal. Therefore, a natural image blur correction image can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a configuration of a lens-integrated video camera (imaging device) that is a video camera with an image blur correction function that is Embodiment 1 of the present invention.

  In FIG. 1, 100 is a fixed front lens unit, 101 is a zoom lens unit that moves in the optical axis direction and performs zooming, 103 is a fixed lens unit, and 104 is a focus lens that moves in the optical axis direction and performs focus adjustment. Is a unit. Reference numeral 102 denotes an aperture for adjusting the amount of light.

  Reference numeral 4 denotes a variable apex angle prism for performing optical image blur correction, which is configured by sealing a transparent elastic body or an inert liquid having a high refractive index between flat glass plates arranged opposite to each other. The variable apex angle prism 4 can displace the optical path by tilting the flat glass.

  A light beam from a subject (not shown) passes through the variable apex angle prism 4, the lens units 101, 101, 103, 104 and the diaphragm 102, and the light receiving surface of the image sensor (photoelectric conversion element) 17 such as a CCD sensor or a CMOS sensor. Image above. In the image sensor 17, the photoelectrically converted charge is accumulated, and the charge is read out at a predetermined timing. The signal output from the image sensor 17 is sent to the video signal processing circuit 18. The video signal processing circuit 18 performs various processes such as predetermined amplification and gamma correction on the output signal from the image sensor 17 to generate a video signal. The video signal is output to a display device (not shown) (liquid crystal display panel or the like). The video signal is also input to the motion vector detection unit 15 in the signal generation circuit 105. The detection operation in the motion vector detection unit 15 will be described later.

  Reference numeral 1 denotes a gyro sensor that physically or mechanically detects the vibration of the video camera. Reference numeral 2 denotes a DC cut filter that blocks the direct current component of the output signal from the gyro sensor 1 and passes only the vibration component. An amplifier 3 amplifies the angular velocity signal output from the DC cut filter 2 to a required level. The angular velocity signal amplified by the amplifier 3 is converted from an analog signal to a digital signal by the AD converter 10 in the signal generation circuit 105 and input to the gyro signal processing unit 12. Here, the signal generation circuit 105 is provided in an arithmetic unit (control circuit) such as a microcomputer or DSP (digital signal processor) that performs various calculations digitally.

  The gyro signal processing unit 12 converts the angular velocity signal into an angular displacement signal. The gyro signal processing unit 12 is basically composed of an integrator, and has a function of a variable high-pass filter (HPF) capable of changing characteristics in an arbitrary band and a function of detecting the frequency of an angular velocity signal.

  The motion vector detection unit 15 detects a video motion vector for each field period of the video signal, and sends a signal (motion vector signal) indicating the detected motion vector to the motion vector conversion unit 16.

  Here, FIG. 2 illustrates a configuration example of the motion vector detection unit 15. Currently, as a motion vector detection method necessary for an image encoding device and an image shake detection device, there are a correlation method and a block matching method. In the block matching method, a field (or frame, the same applies hereinafter) of an input video signal is divided into a plurality of appropriately sized blocks (for example, 8 × 8 lines), and the correlation value with a specific block of the current field is minimized. Search for a block in the previous field. The correlation value is indicated by, for example, the sum of absolute values of differences between pixel values (luminance values) between a specific block and a search block in the previous field. The relative shift amount and direction between the block in the previous field and the specific block in the current field having the smallest correlation value are expressed as a motion vector of the specific block.

  The motion vector detected (calculated) in this way indicates the amount of movement in the vertical and horizontal directions in units of pixels. This motion vector indicates a movement amount per unit time of continuous captured images (field image or frame image), and a value proportional to the movement amount of the continuous captured images is obtained. When there is no error in the shake displacement amount detected by the angular velocity sensor 101 with respect to the displacement amount due to actual vibration (for example, in the case of only a shake in a high frequency range), the motion vector on the image is not detected, and the motion The auxiliary information for shake correction based on the vector is also zero.

  FIG. 2 shows a configuration example of the motion vector detection unit 15 when such a block matching method is used. A video signal to be detected as a motion vector is supplied to the first storage unit 210 and the spatial frequency filter 212 for each field. The first storage unit 210 includes a memory that temporarily stores an image signal of one field. The filter 212 extracts a spatial frequency component useful for motion vector detection from the image signal, and is provided to remove a high spatial frequency component of the image signal.

  The image signal that has passed through the filter 212 is binarized by a binarization unit 213 at a predetermined level. The binarized image signal is given to the correlation calculation unit 214 and the second storage unit 216 as a delay means for one field period. The correlation calculation unit 214 is further added with the image signal of the previous field from the second storage unit 216. The correlation calculation unit 214 performs a correlation calculation between the current field and the previous field in block units according to the block matching method described above, and gives the result to the motion vector calculation unit 218 in the next stage.

  The motion vector calculation unit 218 calculates a motion vector for each block from the given correlation value. The motion vector in units of blocks is given to the motion vector determination unit 224. The motion vector determination unit 224 determines the entire motion vector from the block-based motion vector. For example, the median value or average value of the motion vectors in block units is determined as the entire motion vector.

  The motion vector determined by the motion vector determination unit 224 is input to the motion vector conversion unit 16, where the motion vector is converted by a predetermined method. A specific conversion method will be described later. Then, the converted motion vector signal and the angular displacement signal generated based on the output from the angular velocity sensor 1 described above are added by the adder 14, and the target drive amount of the variable apex angle prism 4 corresponding to the addition result and A signal indicating the direction is generated and input to the subtracter 13 in the signal generation circuit 105.

  The driving amount (position) of the variable apex angle prism 4 is detected by the encoder 5, and the detected signal is converted into a digital signal by the AD converter 9 and fed back to the subtractor 13. The output of the subtractor 13 indicates an error between the target driving amount of the variable apex angle prism 4 and the actual driving amount of the variable apex angle prism 4, and a signal corresponding to this error amount is output by the phase / gain compensator 11 as the phase and gain. As the gain is compensated, it is input to the drive circuit 8 as a shake correction control signal.

  The drive circuit 8 drives the actuator 7 to drive the variable apex angle prism 4 in the drive amount and direction according to the shake correction control signal. The actuator 7 is composed of a voice coil motor or the like, and swings the flat glass of the variable apex angle prism 4. Thereby, image blur correction based on the shake signal (angular displacement signal) generated using the angular velocity sensor 1 and the signal indicating the motion vector of the image is performed.

  Next, a conversion method in the motion vector conversion unit 16 will be described. FIG. 3A shows the change of the motion vector in the original sampling period of the motion vector. As described above, the motion vector is generated, that is, sampled in a field period (1/60 sec for NTSC, 1/50 sec for PAL, and indicated as V period in the figure). On the other hand, the sampling period of the angular displacement signal using the angular velocity sensor 1 is an integral multiple of the calculation (conversion) period in the gyro signal processing unit 12 or the reading period of the angular velocity signal by the AD converter 10 or an integral fraction thereof. It is a period, for example, a period corresponding to a frequency of 1.2 kHz, 2 kHz, or 12 kHz. In this case, since the fluctuation of the motion vector for each sampling period increases, as a result, the fluctuation amount of the addition result of the motion vector signal and the angular displacement signal also increases.

FIG. 3B shows a change in the motion vector converted by the motion vector conversion unit 16 of the present embodiment. The motion vector conversion unit 16 divides the motion vector amount W obtained for each field period ΔT1 by the angular displacement signal generation period ΔT2 by the angular velocity sensor 1 according to the following equation (1), so that each period ΔT2 The amount of motion vector ΔV is obtained.
ΔV = W / (ΔT1 / ΔT2) (1)

  By performing this conversion, in the digital arithmetic processing, the motion vector signal can be substantially synchronized with the generation period of the angular displacement signal, and both can be added, so that the above result of the addition of the motion vector signal and the angular displacement signal The fluctuation amount for each period ΔT2 is reduced, and an image blur correction image without a sense of incongruity can be obtained.

  Although the period indicated by ΔT2 is not strictly synchronized with the V period, since ΔV is small, the actual image blur correction is hardly affected.

  The function and processing flow of each unit constituting the video camera of this embodiment has been described above. The signal generation circuit 105 operates according to software (program) shown in FIG.

  In step (abbreviated as S in the figure) 1, it is determined whether or not the image stabilization switch (IS SW) for selecting whether or not to execute the image blur correction operation is ON. Go to 2 and Step 4.

  In step 2, the angular velocity signal from the angular velocity sensor 1 is acquired, and in step 3, the angular velocity signal is integrated and converted into an angular displacement signal.

  On the other hand, in step 4, a video signal is taken from the video signal processing circuit 18, and a motion vector is detected and determined using the block matching method described above in step 5. In step 6, the motion vector amount ΔV for each angular velocity signal generation cycle is calculated using equation (1).

  Next, in step 7, the angular displacement signal obtained in step 3 and the motion vector amount ΔV obtained in step 6 are added at the angular displacement signal generation period ΔT2. In step 8, the output after the AD conversion of the encoder 5 is subtracted (feedback) from the addition result, and the shake correction control signal is generated by performing phase and gain compensation processing on the signal of the subtraction result. . Next, in step 9, a shake correction control signal is output to the drive circuit 8, and the variable apex angle prism 4 is driven. And it returns to step 1.

  FIG. 5 shows a configuration of a video camera system capable of exchanging lenses, which is Embodiment 2 of the present invention. In FIG. 5, the left side shows the interchangeable lens (optical device), and the right side shows the video camera body (imaging device).

  In the interchangeable lens, 100 is a fixed front lens unit, 101 is a zoom lens unit that moves in the optical axis direction and performs zooming, 103 is a fixed lens unit, and 104 is a focus lens that moves in the optical axis direction and performs focus adjustment. Is a unit. Reference numeral 102 denotes an aperture for adjusting the amount of light.

Reference numeral 4 denotes a variable apex angle prism for performing optical image blur correction, which is configured by sealing a transparent elastic body or an inert liquid having a high refractive index between flat glass plates arranged opposite to each other. The variable apex angle prism 4 can displace the optical path by tilting the flat glass.
In the video camera body, reference numeral 17 denotes an image sensor (photoelectric conversion element) such as a CCD sensor or a CMOS sensor. An interchangeable lens mount (not shown) is mounted on the video camera body mount (not shown) by bayonet coupling.

  A light beam from a subject (not shown) passes through the variable apex angle prism 4, the lens units 101, 101, 103, 104 and the stop 102 and forms an image on the light receiving surface of the image sensor 17. In the image sensor 17, the photoelectrically converted charge is accumulated, and the charge is read out at a predetermined timing. The signal output from the image sensor 17 is sent to a video signal processing circuit 18 provided in the camera body. The video signal processing circuit 18 performs various processes such as predetermined amplification and gamma correction on the output signal from the image sensor 17 to generate a video signal. The video signal is output to a display device (not shown) (liquid crystal display panel or the like). The video signal is also input to a motion vector detection unit 15 provided in the camera body. The configuration and operation of the motion vector detection unit 15 are the same as those described in the first embodiment. The camera body is provided with a camera control circuit 108 that controls all of the control on the camera body side.

  In the interchangeable lens, reference numeral 1 denotes an angular velocity sensor (gyro sensor) that detects physical or mechanical vibration of the interchangeable lens. Reference numeral 2 denotes a DC cut filter that blocks the direct current component of the output signal from the gyro sensor 1 and passes only the vibration component.

  An amplifier 3 amplifies the angular velocity signal output from the DC cut filter 2 to an appropriate level. The angular velocity signal amplified by the amplifier 3 is converted from an analog signal to a digital signal by the AD converter 10 provided in the signal generation circuit 106 and input to the gyro signal processing unit 12.

  The gyro signal processing unit 12 basically includes an integrator in order to convert an angular velocity signal into an angular displacement signal. The gyro signal processing unit 12 also has a function of a variable high-pass filter (HPF) that changes characteristics in an arbitrary band and a frequency detection function of an angular velocity signal.

  A signal (motion vector signal) indicating a motion vector detected for each field period by the motion vector detection unit 15 on the camera body side is transmitted from the camera communication unit 20 to the lens communication unit 19 via the communication contact 21. The camera communication unit 20 and the lens communication unit 19 may be of any communication method as long as they have an electrical data transmission function such as synchronous serial communication. The communication of the motion vector signal is performed at a timing synchronized with the vertical synchronization signal of the video signal, for example.

  The motion vector conversion unit 16 provided in the signal generation circuit 106 on the interchangeable lens side converts the motion vector signal received from the camera body side using the equation (1) described in the first embodiment. Then, the converted motion vector signal and the angular displacement signal generated based on the output from the angular velocity sensor 1 described above are added by the adder 14, and the target drive amount of the variable apex angle prism 4 corresponding to the addition result and A signal indicating the direction is generated and input to the subtracter 13 in the signal generation circuit 106. Here, the signal generation circuit 106 is provided in a calculation device (lens control circuit) such as a microcomputer or a DSP (digital signal processor) that performs various calculations digitally. The arithmetic unit controls the zoom lens 101, the focus lens 104, the diaphragm 102, and the like in addition to driving control of the variable apex angle prism 4.

  The driving amount (position) of the variable apex angle prism 4 is detected by the encoder 5, and the detected signal is converted into a digital signal by the AD converter 9 and fed back to the subtractor 13. The output of the subtractor 13 indicates an error between the target driving amount of the variable apex angle prism 4 and the actual driving amount of the variable apex angle prism 4, and a signal corresponding to this error amount is output by the phase / gain compensator 11 in phase and As the gain is compensated, it is input to the drive circuit 8 as a shake correction control signal.

  The drive circuit 8 drives the actuator 7 to drive the variable apex angle prism 4 in the drive amount and direction according to the shake correction control signal. The actuator 7 is composed of a voice coil motor or the like, and swings the flat glass of the variable apex angle prism 4. Thereby, image blur correction based on the shake signal (angular displacement signal) generated using the angular velocity sensor 1 and the signal indicating the motion vector of the image is performed.

  The function and processing flow of each unit constituting the video camera system of the present embodiment has been described above. The camera control circuit 108 and the lens control circuit (signal generation circuit 106) operate according to software (program) described below. To do.

  FIG. 6 shows a flowchart of a program for controlling the operation from the detection of the motion vector to the communication of the detection result to the lens side in the camera control circuit 108 provided on the camera body side. The camera control circuit 108 transmits not only the motion vector signal but also commands and information related to autofocus, aperture driving, zoom driving, and the like to the interchangeable lens side.

  In FIG. 6, the camera control circuit 108 starts processing of this program at a predetermined timing in step 301. In step 302, it is checked whether or not the motion vector calculation (detection) is completed.

  In step 303, communication data for the interchangeable lens including the motion vector signal is set. Next, in step 304, it is confirmed whether or not a vertical synchronization signal is generated in the camera body. If it is confirmed that the vertical synchronization signal has been generated, the process proceeds to the next process.

  In step 305, a communication interrupt request for transmitting the communication data set in step 303 to the interchangeable lens is transmitted to the interchangeable lens, and the communication of the data is performed in response to receiving a communication interrupt permission signal from the interchangeable lens. I do. Then, the process returns to step 302.

  Next, FIG. 7 is a flowchart of a program for controlling operations from acquisition of an output from the angular velocity sensor 1 to driving of the variable apex angle prism 4 in a lens control circuit (signal generation circuit 106) provided on the interchangeable lens side. Indicates.

  In step 310, the lens control circuit starts processing of this program at a predetermined timing. In step 311, it is confirmed whether there has been a communication interrupt request from the camera body side. If there is an interrupt request, the process proceeds to step 312.

  In step 312, a communication interrupt permission signal is transmitted to the camera body, and communication of data (such as motion vector signals) with the camera body is started. In step 313, a motion vector amount ΔV for each angular velocity signal generation cycle is calculated using equation (1). Next, in step 314, the angular displacement signal generated based on the output from the angular velocity sensor 1 and the motion vector amount ΔV acquired in step 313 are added in the angular displacement signal generation cycle ΔT2. In step 315, the output after the AD conversion of the encoder 5 is subtracted (feedback) from the addition result, and a shake correction control signal is generated by performing phase and gain compensation processing on the subtraction result signal. . Subsequently, in step 316, a shake correction control signal is output to the drive circuit 8 to drive the variable apex angle prism 4. Then, the process returns to step 311.

  As described above, according to each of the above embodiments, the first shake signal generated based on the output of the angular velocity sensor, the second shake signal indicating the motion vector of the image acquired using the image sensor, and When the image blur correction is performed by adding the two, the second shake signal is divided in accordance with the AD conversion cycle of the angular velocity sensor or the filter calculation cycle, that is, the generation cycle of the first shake signal, and both shake signals are added. Thus, digital hybrid image shake correction using a shake signal based on the angular velocity sensor and a shake signal based on the motion vector can be realized.

  In each of the above-described embodiments, the case where a variable apex angle prism is used as the image blur correction unit has been described. However, a so-called shift that displaces the optical path by moving the lens in a direction other than the optical axis direction, such as the optical axis orthogonal direction. The present invention can also be applied to the case where a formula image shake correction unit is used. In addition, the present invention can be applied to other types of image shake correction means such as an image shake correction means that swings a mirror or drives an image sensor in the in-plane direction of the light receiving surface. .

  Further, in the second embodiment, in the video camera system capable of exchanging lenses, the motion vector detection unit 15 is provided on the camera body side, and the signal generation circuit 106 (motion vector conversion unit 16 and addition unit 17 and the like) is provided on the lens side. However, these components may be provided on either the camera body side or the lens side. For example, the signal generation circuit 106 may be provided on the camera body side together with the motion vector detection unit 15 so that the output from the angular velocity sensor 1 is communicated from the lens side to the camera body side. The vector detection unit 15 may be provided on the lens side so that the video signal is communicated from the camera body side to the lens side.

  In each of the above embodiments, the generation period of the angular displacement signal, that is, the generation period of the shake correction control signal is set according to the shooting magnification (optical zoom magnification × electronic zoom magnification, or optical zoom magnification when there is no electronic zoom function). It may be changed. For example, the image blur that occurs even with the same magnitude of vibration is greater on the tele side than on the wide side, so the generation period of the shake correction control signal may be shortened on the tele side than on the wide side. .

  In each of the above embodiments, the angular velocity sensor is used as a sensor for detecting the vibration of the video camera, but an acceleration sensor may be used instead of or together with the angular velocity sensor.

1 is a block diagram showing a configuration of a video camera that is Embodiment 1 of the present invention. FIG. 3 is a block diagram illustrating a configuration of a motion vector detection unit according to the first embodiment. (A), (b) is a conceptual diagram for demonstrating the conversion process of the motion vector in Example 1. FIG. 3 is a flowchart illustrating an image blur correction operation of the video camera according to the first embodiment. The block diagram which shows the structure of the video camera system which is Example 2 of this invention. 9 is a flowchart showing the operation of the camera body in Embodiment 2. 9 is a flowchart showing the operation of the interchangeable lens in Example 2. The block diagram which shows the structure regarding the image blur correction of the conventional video camera.

Explanation of symbols

1 Angular velocity sensor (gyro sensor)
4 variable apex angle prism 10 AD converter 14 adder 15 motion vector detection unit 16 motion vector conversion unit 17 image sensor 105, 106 signal generation circuit (control circuit)

Claims (10)

A first shake signal that is an analog signal generated based on an output from a detection unit that detects vibration and a second shake signal that is a digital signal indicating the motion of an image generated using a photoelectric conversion element. Adding signal generation means for generating a control signal for controlling the correction means for correcting image blur;
The optical device characterized in that the signal generating means converts the first shake signal into a digital signal and adds the digital signal to the second shake signal. Image blur is corrected by adding the first shake signal generated based on the output from the detection means for detecting vibration and the second shake signal indicating the motion of the image generated using the photoelectric conversion element. Signal generating means for generating a control signal for controlling the correcting means to perform,
The optical apparatus characterized in that the signal generating means adds the second shake signal to the first shake signal at a period corresponding to a generation period of the first shake signal.   The signal generation unit divides the motion amount of the image represented by the second shake signal by the generation period of the first shake signal, and adds the divided motion amount to the first shake signal. The optical apparatus according to claim 1.   The optical apparatus according to claim 2, wherein the generation period of the first shake signal is a period for calculating the first shake signal based on an output from the detection unit.   The optical apparatus according to claim 2, wherein the generation period of the first shake signal is a period for converting an analog signal from the detection unit into a digital signal.   The optical apparatus according to claim 2, wherein the signal generation unit changes a generation cycle of the control signal according to a photographing magnification.   The optical apparatus according to claim 1, wherein the detection unit detects an angular velocity due to the vibration. The detection means;
The photoelectric conversion element;
The optical apparatus according to claim 1, wherein the optical apparatus is an image pickup apparatus including the correcting unit.   The optical apparatus according to claim 1, wherein the optical apparatus is a lens apparatus that can be attached to an imaging apparatus including the photoelectric conversion element and includes the correction unit. The optical apparatus according to claim 1, wherein the optical apparatus is an imaging apparatus having the photoelectric conversion element, and a lens apparatus having the correction unit is attached.

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