JP2015197562A - Optical equipment, imaging device having optical equipment, and control method for optical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide optical equipment which is advantageous in panning photography.SOLUTION: The optical equipment includes: shake detection means (135) for detecting shake; image shake correction means (132) for performing image shake correction by driving an optical element in a direction orthogonal to an optical axis; setting means (124) for setting the output of the shake detection means as a reference value when the scale of the motion vector of a subject is equal to or less than a predetermined value as a reference value; and control means (124) for controlling the operation of the image shake correction means in accordance with a time since the reference value is set until exposure starts.

Description

  The present invention relates to an optical apparatus that performs image shake correction during panning shooting.

  Conventionally, there is a panning shot as a shooting technique that expresses the sense of speed of a moving subject. The purpose of panning is to make the moving subject stand still and the background to flow by panning the camera in accordance with the movement of the subject. At this time, it is common to shoot with a slow shutter speed in order to make the subject feel lively. Experience is required to make the camera follow the movement of the subject accurately, and since the shutter speed is slow, shake is likely to occur, which is a relatively difficult shooting technique for beginners. Therefore, Patent Document 1 proposes a technique for assisting panning by using an image blur correction optical system. As a specific method, the moving speed of the main subject on the imaging surface is detected, and the main subject moving speed is calculated from the difference from the panning speed performed by the photographer. During exposure, a difference between the calculated main subject moving speed and the panning speed performed by the photographer, that is, a panning speed error is detected. By decentering the optical system so as to correct the error, the photographer can take a beautiful panning shot.

JP 2007-139552 A

  The invention described in Patent Document 1 is based on the premise that the main subject targeted by the photographer matches the main subject recognized by the camera. When there are a plurality of subjects, it is difficult for the camera to determine which subject the photographer is mainly panning and misrecognition is also possible. In addition, the moving speed of the main subject may change greatly, and the panning speed may not be accurately detected. In such a case, if the panning speed error correction of the invention described in Patent Document 1 is performed, the main subject that the photographer is aiming at may be shaken. As described above, when panning is performed with the invention described in Patent Document 1, there is a case where it is disadvantageous.

  In view of the above problems, an object of the present invention is to provide an optical apparatus that is advantageous for panning shots.

  An optical apparatus according to one aspect of the present invention includes a shake detection unit that detects a shake, and an image shake that performs image shake correction by driving an optical element in a direction orthogonal to the optical axis based on an output of the shake detection unit. According to the correction means, setting means for setting the output of the shake detection means when the magnitude of the motion vector of the subject is within a predetermined value as a reference value, and the time from the setting of the reference value to the start of exposure Control means for controlling the operation of the image blur correction means.

  Other objects and features of the present invention are illustrated in the following examples.

  According to the present invention, it is possible to provide an optical apparatus advantageous for panning shot photography.

It is a block diagram showing the camera system of this invention. It is a figure showing the imaging | photography method at the time of panning photography of this invention. It is a figure showing each signal waveform at the time of panning photographing of the present invention. It is a figure showing each signal waveform at the time of panning photographing of the present invention. It is a figure showing each signal waveform at the time of panning photographing of the present invention. It is a flowchart which shows operation | movement of the camera of this invention. It is a flowchart which shows operation | movement of the interchangeable lens of this invention. It is a flowchart which shows operation | movement of the interchangeable lens of this invention. 3 is a flowchart illustrating an image blur correction operation according to the present invention.

  Hereinafter, the present invention will be described in detail based on illustrated embodiments.

  The configuration of the camera system according to the embodiment of the present invention will be described below with reference to FIG. The camera system includes a camera body 101 and an interchangeable lens 102. The photographing light flux from the subject passes through the photographing optical system of the interchangeable lens 102 and is partially reflected by the quick return main mirror 103 whose central portion is a half mirror during preparation for photographing, and becomes an erect image at the pentaprism 104. The photographer can confirm the erect image as a subject image in the optical viewfinder 105. Reference numeral 106 denotes a photometric circuit, and a sensor in the photometric circuit is a sensor composed of multi-pixel elements divided into a plurality of areas. The sensor measures the illuminance of the subject and indicates the moving direction and moving speed of the subject over time. Information can be calculated. In this way, the photometric circuit 106 functions as a motion vector detection unit that detects the motion of the subject. The photometry circuit 106 inputs the photometry result of the sensor and the motion vector information to the camera system control MPU 107. The camera system control MPU 107 determines shooting conditions such as exposure time and aperture.

  Reference numeral 108 denotes a sub mirror, which is disposed on the back surface of the quick return main mirror 103, and causes the light beam that has passed through the half mirror surface of the quick return main mirror 103 to enter the distance measuring means 109. The distance measuring means 109 photoelectrically converts the incident light beam and performs signal processing to create distance measurement data, which is input to the camera system control MPU 107.

  When the photographing operation is started, the quick return main mirror 103 and the sub mirror 108 are retracted to the pentaprism 104 side, and the focal plane shutter 110 is driven by the shutter drive circuit 111. Then, the photographing light beam forms an image on the surface of the imaging unit (CCD or CMOS) 112 as a photographing optical image. The captured optical image is photoelectrically converted by the imaging unit 112 into an imaging signal. As described above, the imaging unit 112 includes an imaging element (imaging unit) that photoelectrically converts light that has passed through the interchangeable lens 102 (optical device).

  A timing generator 113 controls an accumulation operation, a read operation, a reset operation, and the like of the imaging unit 112. Reference numeral 114 denotes a CDS circuit (double correlation sampling circuit) that reduces accumulated charge noise of the imaging unit 112, and reference numeral 115 denotes a gain control circuit that amplifies the imaging signal. Reference numeral 116 denotes an A / D converter that converts the amplified imaging signal from analog to digital image data. Reference numeral 117 denotes a video signal processing circuit that performs filter processing, color conversion processing, gamma processing, and the like on the image data digitized by the A / D converter 116. The image signal processed by the video signal processing circuit 117 is stored in the buffer memory 118 and displayed on the LCD 119 or recorded on the removable memory card 120.

  The operation unit 121 includes switches for setting a shooting mode of the camera, setting a recording image file size, and releasing at the time of shooting. The camera system control MPU 107 controls the operation of the camera body 101 and communicates with the lens MPU 124 via the interface circuit 122 on the camera body 101 side and the interface circuit 123 on the interchangeable lens 102 side. In this communication, various data are exchanged between the digital camera body 101 and the interchangeable lens 102. As described above, the interface circuit 122 on the camera body 101 side and the interface circuit 123 on the interchangeable lens 102 side function as communication means for exchanging information between the camera and the lens, and mutually serve as transmission means and reception means (acquisition means). It has the function of.

  In the interchangeable lens 102, a focus lens 125, a zoom lens 126, an image shake correction lens 127, and a diaphragm 128 are disposed as a part of the photographing optical system. The lens MPU 124 (control means) comprehensively controls members included in the interchangeable lens 102.

  The focus lens 125 is driven by a control signal from the lens MPU 124 via the focus control circuit 129 and the focus lens driving motor 130. In addition to the focus lens driving circuit, the focus control circuit 129 includes a focus encoder that outputs a zone pattern signal and a pulse signal according to the movement of the focus lens. The subject distance can be detected by this focus encoder.

  The zoom lens 126 moves when the photographer operates a zoom operation ring (not shown). The zoom encoder 131 outputs a zone pattern signal corresponding to the movement of the zoom lens. The photographic image magnification is obtained by the lens MPU 124 reading signals from the focus encoder and zoom encoder 131 and reading out pre-stored photographic image magnification data based on a combination of subject distance and focal length.

  The image blur correction lens 127 is driven via an image blur correction control circuit 132 and a linear motor 133. Image blur correction is performed as follows. That is, a shake signal of an angular velocity sensor 135 (a shake detection unit) that detects rotational shake is signal-processed by the signal processing circuit 136 and input to the lens MPU 124. The lens MPU 124 calculates a correction lens drive target signal and outputs a drive signal corresponding to the difference between the correction lens drive target signal and the correction lens position signal output from the correction lens encoder 134 to the image blur correction control circuit 132. . Image blur correction is performed by feeding back the correction lens position signal output from the correction lens encoder 134 to the image blur correction control circuit 132 in this way. Note that the above-described image blur correction control is performed on each of the two axes of the camera body 101 as a center, that is, the pitch axis for detecting the vertical tilt and the yaw axis for detecting the horizontal tilt. As described above, the image blur correction control circuit 132 drives the image blur correction lens 127 (optical element) in a direction orthogonal to the optical axis based on the output of the angular velocity sensor 135 to perform image blur correction means. Function as. In the present embodiment, the image blur correction lens 127 is driven in a direction orthogonal to the optical axis to obtain an image blur correction effect. However, the present invention is not limited to this, and for example, the imaging unit 112 (optical element) is provided. An image blur correction effect may be obtained by driving in a direction orthogonal to the optical axis.

  The diaphragm 128 is driven via a diaphragm control circuit 137 and a stepping motor 138 by a control signal from the lens MPU 124.

  The switch 139 is a switch for selecting image blur correction ON / OFF and image blur correction operation mode. As the image shake correction operation mode, a normal image shake correction operation and a panning operation mode when performing panning shooting can be selected.

  Next, the panning method of the present invention will be described with reference to FIGS.

  FIG. 2 shows the movement of the subject and the camera in time series (a) and (b) when the subject passing in front of the subject is shot by the panning method. During panning, the camera is shaken so as to match the moving speed of the subject even during the exposure period, so that the movement of the subject is stopped and a photograph with the background flowing can be taken. However, when the photographer is unfamiliar or the like, even if he intends to aim at the center C0 of the subject and shake the camera in accordance with the movement of the subject, he or she will aim at the position C1 that is deviated from the center C0 of the subject in FIG. May shift.

  FIG. 3 shows the waveform of the output of the angular velocity sensor 135 and the motion vector amount of the subject image detected by the photometry circuit 106 when the aim is shifted in panning shooting. 3A shows an output waveform of the angular velocity sensor 135, and FIG. 3B shows a motion vector signal waveform. In FIG. 3A, if the subject speed is constant, the ideal panning angular speed at which the subject keeps chasing without shaking becomes a constant angular speed as indicated by a dotted line. If the subject continues to follow without being shaken, the motion vector of the subject in FIG. 3B is “0”. However, it is difficult to keep track of the moving subject accurately, and in actuality, it deviates from the ideal panning angular velocity as in the angular velocity waveform at the time of panning shown by the solid line in FIG. The motion vector at this time also deviates from “0” as shown in FIG.

  Therefore, if the image blur correction lens 127 is driven so as to correct the deviation from the ideal panning angular velocity, the blur of the subject can be corrected. As an actual photographing operation, an ideal angular velocity is calculated before exposure, and the image blur correction lens 127 is driven so as to correct a deviation from the ideal panning angular velocity during exposure.

  Here, as a method for calculating the ideal panning angular velocity, there is a method of storing the output of the angular velocity sensor 135 when the motion vector is in the vicinity of “0”, that is, when it is equal to or less than a predetermined value. FIG. 4 shows the output waveform of the angular velocity sensor 135 and the motion vector signal waveform similar to FIG. In FIG. 4B, t0 to t2 are timings when the motion vector is equal to or less than a predetermined value, and the output of the angular velocity sensor 135 at that timing may be stored as an ideal panning angular velocity. In this case, the panning angular velocity stored at the timing t0 closest to the start of exposure is the ideal panning angular velocity, and becomes the reference panning angular velocity (reference value, reference angular velocity) for correction during exposure.

  However, when the main subject that the photographer wants to pan and the main subject determined by the photometry circuit 106 are different or the motion vector cannot be accurately detected, the motion vector is “0” for a while as shown in FIG. "Do not be close. At this time, if the photographer is instructed to start exposure and operates to correct the deviation from the reference panning angular velocity during exposure, there is a possibility that the shake will increase. Therefore, when the timing at which the reference panning angular velocity is calculated is a predetermined time TLMT or more before the start of exposure, it is a point of the present invention that the panning error correction during exposure is not operated. When a plurality of reference panning angular velocities are calculated between the start of exposure and before the predetermined time TLMT, a panning error during exposure using the reference panning angular velocities calculated at the time closest to the start of exposure. Correction may be performed.

  The above operation will be described with reference to the flowcharts of FIGS.

  First, the photographing operation on the camera body 101 side will be described with reference to the flowchart of FIG. The flow in FIG. 6 is executed by the camera system control MPU 107.

  When the main switch is turned on on the camera body 101 side, the operation starts from step S601.

  In step S601, it is determined whether or not the release switch in the operation unit 121 of the camera body 101 is half-pressed (SW1 ON). If half-pressed, the process proceeds to step S602, and if not half-pressed, the processing here ends.

  In step S602, camera lens status communication is performed with the lens MPU 124 via the interface circuits 122 and 123. Here, the camera state (release switch state SW1 ON, shooting mode, shutter speed, etc.) is transmitted to the lens, and the lens state (focal length, aperture state, focus lens drive state, etc.) is received. . Although the camera lens status communication is described only in the main part in the flowchart of the present embodiment, it is performed at any time when the camera state changes or when the camera wants to check the lens state.

  In step S603, since the release switch is pressed halfway (SW1 ON), the distance measuring unit 109 measures the distance and calculates the focus lens driving amount for focusing on the subject.

  In step S604, the focus lens drive amount is transmitted to the interchangeable lens 102. This data is transmitted, for example, as a drive target pulse amount of the focus encoder.

  In step S605, distance measurement is performed again after the focus lens drive is completed.

  In step S606, it is determined whether or not it is within the in-focus depth. If it is within the in-focus depth, the process proceeds to step S607.

  In step S607, since it is within the focus depth, focus display is performed. This is done by turning on an LED in the optical viewfinder 105 of the camera body 101 or generating a sound.

  In step S608, the photometric result (luminance) from the photometric circuit 106 is obtained, and the exposure time Tv and aperture value (aperture drive amount) are calculated.

  In step S609, the main subject is determined from the image signal of the photometry circuit 106.

  In step S610, motion vector information of the main subject is detected.

  In step S611, the detected motion vector information of the main subject is transmitted to the lens MPU 124.

  In step S612, it is determined whether or not the release switch in the operation unit 121 of the camera body 101 has been fully pressed (SW2 ON). If it is fully pressed, the process proceeds to step S613. If not fully depressed, the process returns to step S601.

  In step S613, the quick return primary mirror 103 is raised. At this time, the sub mirror 108 is also driven to the pentaprism 104 side together with the main mirror 103. At this time, the subject image that has entered the distance measuring means 109 is blocked.

  In step S614, the aperture drive amount obtained in step 608 is transmitted to the interchangeable lens 102, and the aperture 128 is driven.

  In step S615, the front curtain shutter is driven.

  In step S616, the subject image is exposed to the imaging unit 112 to accumulate charges.

  In step S617, when the exposure time has elapsed, the rear curtain shutter is driven and the exposure ends.

  In step S618, charge transfer (reading) from the imaging unit 112 is performed.

  In step S 619, the read captured image signal is converted into digital data via the CDS circuit 114, the gain control circuit 115, and the A / D converter 116, and stored in the buffer memory 118.

  In step S620, an aperture opening command is transmitted to the interchangeable lens 102, and the aperture 128 is returned to the open position.

  In step S621, the quick return primary mirror 103 and the sub mirror 108 are mirrored down.

  In step S622, image correction processing such as gamma correction and compression processing is performed.

  In step S623, the image data subjected to the image correction process is displayed on the LCD 119 and recorded in the memory card 120, and a series of operations up to photographing is completed.

  Next, the operation on the interchangeable lens 102 side will be described with reference to the flowcharts shown in FIGS. The flow in FIG. 7 is executed by the lens MPU 124.

  When the lens is attached to the camera, serial communication is performed from the camera to the lens, and the operation starts from step S701 in FIG.

  In step S701, initial settings for lens control and image blur correction control are performed.

  In step S702, the state of switches (not shown) and the position of zoom / focus are detected. Examples of the switches include a switch for switching between auto focus and manual focus, and an ON / OFF switch for an image blur correction function.

  In step S703, it is determined whether there has been a focus drive command communication from the camera. If a focus drive command has been received, the process proceeds to step 704. If not received, the process proceeds to step 708.

  In step S704, the target drive amount (number of pulses) of the focus lens is also transmitted in the focus drive command communication from the camera. Therefore, the focus drive control is performed so that the number of pulses of the focus encoder in the focus control circuit 129 is detected and the target number of pulses is driven.

  In step S705, it is determined whether the target pulse number P has been reached. If the target has been reached, the process proceeds to step S706, and if not, the process proceeds to step S707.

  In step S706, since the target number of pulses has been reached, driving of the focus lens is stopped.

  In step S707, since the target number of pulses has not been reached, the speed of the focus lens driving motor 130 is set according to the number of remaining driving pulses. Decreases as the number of remaining drive pulses decreases.

  In step S708, if the image blur correction function ON / OFF switch OFF is detected in step S702, the image blur correction lens 127 is locked to the optical axis center. If ON is detected and the release switch SW1 ON of the camera is detected by camera lens status communication, the lock is released (unlocked), and the image blur correction operation is enabled.

  In step S709, it is determined whether a command to stop all driving (stop driving all actuators in the lens) is received from the camera. If no operation is performed on the camera side, the entire drive stop command is transmitted from the camera after a while. If a full drive stop command is received, the process proceeds to step S710. If a full drive stop command is not received, the process returns to step S702.

  In step S710, full drive stop control is performed. Here, all actuator driving is stopped, and the microcomputer is put into a sleep (stopped) state. Power supply to the image shake correction apparatus is also stopped. Thereafter, when any operation is performed on the camera side, the camera sends a communication to the lens to cancel the sleep state.

  During these operations, if there is a request for serial communication interruption or image blur correction control interruption due to communication from the camera, such interruption processing is performed.

  The serial communication interrupt process decodes communication data and performs lens processing such as aperture driving and focus lens driving according to the decoding result. Then, SW1ON, SW2ON, shutter speed, camera model, and the like can be determined by decoding the communication data.

  The image blur correction control interrupt is a timer interrupt that is generated at regular intervals, and performs pitch direction (vertical direction) control and yaw direction (horizontal direction) image blur correction control.

  First, the serial communication interrupt will be described with reference to the flowchart of FIG. The flow in FIG. 8 is executed by the lens MPU 124.

  When communication from the camera is received, the operation starts from step S801.

  In step S801, an instruction (command) from the camera is analyzed, and the process branches to a process corresponding to each instruction.

  In step S802, since the focus drive command is received, in step S803, the speed of the focus lens drive motor 130 is set according to the target drive pulse number, and focus lens drive is started.

  In step S804, since the aperture drive command has been received, the drive pattern of the stepping motor 138 is set in step S805 in order to drive the aperture 128 based on the transmitted aperture drive data. Then, the set drive pattern is output to the stepping motor 138 via the aperture control circuit 137 to drive the aperture 128.

  In step S806, since the camera lens status communication has been received, in step S807, the lens focal length information and IS operation status are transmitted to the camera, and the camera status status (release switch status, shooting mode, shutter speed, etc.). ).

  In step S808, since the subject information reception command is received, the motion vector information of the subject received in step S809 is stored in the RAM in the lens MPU 124. In other words, the interface circuit 123 on the interchangeable lens 102 side functions as an acquisition unit that acquires information (motion vector information) indicating the magnitude of the motion vector of the subject.

  In step S810, there are other commands such as lens focus sensitivity data communication and lens optical data communication, and these processes are performed in step S811.

  Next, image blur correction interruption will be described with reference to the flowchart of FIG. The flow in FIG. 9 is executed by the lens MPU 124.

  When an image blur correction interruption occurs during the main operation of the lens, the lens MPU 124 starts image blur correction control from step S901 in FIG.

  In step S901, the output signal obtained by processing the signal of the angular velocity sensor 135 by the signal processing circuit 136 is A / D converted.

  In step S902, the state of the switch 139 is determined to determine whether the mode is the panning mode or the normal image stabilization mode. If the mode is the normal image stabilization mode, the process proceeds to step S903. The process proceeds to S906.

  In step S903, a high-pass filter operation is performed to cut low frequency components. The high-pass filter time constant is switched for a predetermined time from the start of calculation, and an operation for quickly stabilizing the signal is also performed.

  In step S904, integration calculation is performed with the calculation result of the high-pass filter as input. This result is angular displacement data.

  In step S905, the image stabilization sensitivity corresponding to the zoom position and the focus position is read, and the target drive amount of the shake correction lens 127 is calculated.

  In step S906, since the panning mode is selected, it is determined whether SW2 is ON, that is, whether the exposure operation is selected. If SW2 is OFF, the process proceeds to step S907, and if SW2 is ON, the process proceeds to step S912.

  In step S907, it is determined whether or not the motion vector amount of the subject is equal to or less than a predetermined value. If it is larger than the predetermined value, the process proceeds to step S908, and if it is equal to or smaller than the predetermined value, the process proceeds to step S909.

  In step S908, a timer (measuring unit) that measures time since the reference angular velocity is set is counted up.

  In step S909, since the amount of motion vector of the subject is less than or equal to the predetermined value in step S907, it is determined that the subject is accurately followed, and the angular velocity detected at this time is set as the reference angular velocity. In other words, the lens MPU 124 functions as a setting unit that sets the output of the shake detection unit when the magnitude of the motion vector of the subject is within a predetermined value as the reference angular velocity.

  In step S910, since the reference angular velocity has been set, the timer that measures the time since the reference angular velocity was set is cleared.

  In step S911, the target drive amount 0 is set. In other words, the lens MPU 124 does not operate the image blur correction unit when it is not during exposure (SW2 ON). This is because when the switch SW2 is not ON, the correction lens 127 is electrically held in the center.

  In step S912, it is determined whether the timer that measures the time since the reference angular velocity is set is within a predetermined time. If the time from the setting of the reference angular velocity to the start of exposure is within a predetermined time, the process proceeds to step S913 to control the image blur correction unit to operate. If the time from the setting of the reference angular velocity to the start of exposure exceeds a predetermined time, the process proceeds to step S916, and control is performed so that the image blur correction unit is not operated. That is, the lens MPU 124 controls the operation of the image blur correction unit according to the time from the setting of the reference angular velocity to the start of exposure.

  In step S913, the difference between the reference angular velocity calculated in step S909 and the angular velocity of the panning obtained from the angular velocity sensor is calculated.

  In step S914, the angular velocity difference calculated in step S913 is integrated and angular displacement data is calculated.

  In step S915, the image stabilization sensitivity corresponding to the zoom position and the focus position is read, and the target drive amount of the shake correction lens 127 is calculated. In this way, by driving the shake correction lens 127 so as to cancel the deviation between the reference angular velocity of the panning shot and the current panning shooting speed, the subject shake does not occur at the time of panning shooting, and a highly accurate panning photo can be taken. It becomes possible.

  In step S916, since it is determined that the time since the setting of the reference angular velocity in step S912 has passed a predetermined time, the target drive amount is set to 0 so that the error correction of panning is not performed.

  In step S917, the signal of the correction lens encoder 134 that detects the amount of eccentricity of the image blur correction lens 127 is A / D converted, and the A / D result is stored in the RAM area in the lens MPU 124.

  In step S918, feedback calculation is performed.

  In step S919, a phase compensation calculation is performed in order to obtain a stable control system.

  In step S920, the calculation result of step S919 is output as PWM to the port of the lens MPU 124, and the image blur correction interruption is completed. The output is input to a driver circuit in the image blur correction control circuit (IS control circuit) 132, and the image blur correction lens 127 is driven by the linear motor 133 to correct the image blur.

  As described above, if the timing at which the panning reference angular velocity is set is within a predetermined time from the start of exposure, the panning shake correction is performed during exposure, and if it is before the predetermined time, the motion vector is accurately calculated. Judgment that it has not been detected and does not perform panning shake correction. By operating in this way, it is possible to easily take a beautiful panoramic photo with no background of the main subject and the background is flowing, and if there is a possibility of increasing the shake, Stops shake correction.

  According to the present invention, if the timing at which the photographer detects the panning reference angular velocity is within a predetermined time from the start of exposure, it is determined that the detected panning reference angular velocity is appropriate. During exposure, an operation is performed to calculate a panning angular velocity error from the difference between the detected cornering reference angular velocity and the angular velocity detected by the shake detection means, and to correct (reduce) the calculated angular velocity error. Thus, it is possible to accurately correct subject shake during panning.

  In addition, if the timing at which the photographer's panning reference angular velocity is detected is a predetermined time or more before the start of exposure, it is determined that the detected panning angular velocity is not appropriate. Then, during exposure, by operating so as not to correct subject shake during panning, it is possible to prevent subject shake from occurring.

  In the present embodiment, an example in which the subject shake speed is detected by the photometric means of the camera is shown. However, even with an electronic viewfinder camera without a quick return mirror or a camera that observes a subject image in live view shooting, the same effect can be obtained if the vector information of the subject can be calculated on the imaging surface. Further, in this embodiment, a so-called lens interchangeable imaging device (camera system) configured by a lens device (optical device) and an imaging device main body to which the lens device is detachably mounted has been described as an example. However, the present invention is not limited to this. For example, the imaging device of the present invention may be a lens-integrated imaging device.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist.

  The present invention can be suitably used for an imaging apparatus such as a compact digital camera, a single-lens reflex camera, and a video camera.

124 Lens MPU
132 shake correction control circuit 135 angular velocity sensor

Claims (11)

Shake detection means for detecting shake;
Based on the output of the shake detection unit, an image shake correction unit that performs image shake correction by driving the optical element in a direction orthogonal to the optical axis;
Setting means for setting, as a reference value, the output of the shake detection means when the magnitude of the motion vector of the subject is within a predetermined value;
Control means for controlling the operation of the image blur correcting means according to the time from the setting of the reference value to the start of exposure;
An optical apparatus comprising: The control means includes
When the time from the setting of the reference value to the start of exposure is within a predetermined time, control to operate the image blur correction unit,
When the time from the setting of the reference value to the start of exposure exceeds a predetermined time, the image blur correction unit is controlled not to operate.
The optical apparatus according to claim 1.   The control means controls the image blur correction means to operate using a reference value set at a time closest to the start of exposure when a plurality of the reference values are set. The optical apparatus according to claim 1 or 2. The shake detection means is an angular velocity sensor,
The setting means sets the output of the angular velocity sensor when the magnitude of the motion vector is within a predetermined value as a reference angular velocity,
The control means calculates a difference between the reference angular velocity and the angular velocity detected by the shake detection means during exposure, and operates the image shake correction means to reduce the difference. The optical apparatus according to any one of claims 1 to 3.   The optical apparatus according to claim 1, wherein the control unit does not operate the image blur correction unit when exposure is not being performed.   The optical apparatus according to claim 1, wherein the setting unit sets the reference value when performing panning.   The optical apparatus according to claim 1, further comprising an acquisition unit configured to acquire information indicating a magnitude of a motion vector of the subject.   The optical apparatus according to any one of claims 1 to 7, further comprising a measuring unit that measures a time since the reference value is set. The optical apparatus according to any one of claims 1 to 8,
An image sensor that photoelectrically converts light that has passed through the optical device;
An imaging device comprising:   The imaging apparatus according to claim 9, further comprising a motion vector detection unit that detects a motion of the subject. Control of optical apparatus comprising shake detection means for detecting shake and image shake correction means for driving the optical element in a direction orthogonal to the optical axis based on the output of the shake detection means to perform image shake correction A method,
A setting step for setting, as a reference value, an output of the shake detection means when the magnitude of the motion vector of the subject is within a predetermined value;
A control step for controlling the operation of the image blur correction unit according to the time from the setting of the reference value to the start of exposure;
A method for controlling an optical apparatus, comprising: