JP2011118315A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a shake of an imaging apparatus resulting from a shock of a mirror gives an unpleasant feeling to a user, and becomes a cause to induce image blur relative to charge storage of an imaging device, however, the charge storage of the imaging device is started after the shake of the imaging apparatus is suppressed, there is possibility of missing a photo opportunity, and a number of taken photographs per unit time is decreased. <P>SOLUTION: The imaging apparatus includes: a mirror part which turns between a first state in which a subject image is guided to a finder optical system, and a second state in which the subject image is guided to an imaging surface; a moving part which can move at least in a direction having a component of a direction where the mirror part turns between the first state and the second state; and a controller which moves the moving part so as to cancel at least a part of inertia force generated when the mirror part turns from the first state to the second state or from the second state to the first state. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an imaging apparatus.

  A technique is known in which the image sensor is moved in a plane perpendicular to the subject optical axis, and the camera shake during the period in which the image sensor receives the subject light flux and accumulates charges is known. As a result, the user can obtain a photographed image with little camera shake even when photographing at a relatively slow shutter speed.

JP 2003-110919 A

  A part of an imaging apparatus typified by a single-lens reflex camera includes a mirror mechanism that rotates a mirror between a reflection state in which a subject light beam is guided to a focus plate and a retraction state in which the subject light beam is guided to an imaging surface. When the image sensor starts to accumulate charges, the mirror is rotated from the reflective state to the retracted state prior to that. Since the rotation of the mirror is normally performed at a high speed, the mirror collides with the member when the mirror is stationary, and this causes the entire imaging apparatus to shake. This shaking has caused image blurring with respect to charge accumulation in the image sensor. Therefore, there has been a demand for suppressing the shaking of the imaging device itself.

  In order to solve the above-described problem, an imaging apparatus according to an aspect of the present invention rotates between a first state in which a subject image is guided to a finder optical system and a second state in which the subject image is guided to an imaging surface. A moving mirror part, a moving part capable of moving in a direction having at least a component in a direction in which the mirror part rotates between the first state and the second state, and the mirror part from the first state to the second state or And a control unit that moves the moving unit so as to cancel at least a part of the inertial force that is generated when rotating from the second state to the first state.

  The above summary of the invention does not enumerate all necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

It is principal part sectional drawing of a single-lens reflex camera. 6 is a schematic diagram showing a configuration of a moving mechanism 49. FIG. It is a schematic diagram which shows the relationship between the operation | movement which a mirror part rotates from an oblique installation state to a retracted state, and the operation | movement of the moving mechanism holding an image sensor. It is a schematic diagram which shows the relationship between the operation | movement which a mirror part rotates from a retracted state to an oblique installation state, and the operation | movement of the moving mechanism holding an image sensor. It is a block diagram which shows roughly the system configuration | structure regarding the movement process of a moving mechanism. It is a timing chart which shows transition of mechanical operation.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 is a cross-sectional view of a main part of a single-lens reflex camera 10. The single-lens reflex camera 10 functions as an imaging device by combining the lens unit 20 and the camera unit 30.

  The lens unit 20 includes a lens group 21 arranged along the optical axis 11. The lens group 21 guides the incident subject luminous flux to the camera unit 30. The lens group 21 includes a focus lens, a zoom lens, and the like, and is configured to be movable in the optical axis direction in response to instructions for focus adjustment and field angle adjustment. The lens unit 20 includes a lens mount 22 at a connection portion with the camera unit 30, engages with a camera mount 61 provided in the camera unit 30, and is integrated with the camera unit 30.

  The camera unit 30 includes a main mirror 31 that reflects the subject light beam incident from the lens unit 20 and a focus plate 35 on which the subject light beam reflected by the main mirror 31 forms an image. The main mirror 31 is held by the main mirror holding frame 32 and rotates around the main mirror rotation shaft 33 so that the main mirror 31 is obliquely installed in the subject light flux centered on the optical axis 11 and retracted from the subject light flux. The evacuation state to take can be taken.

  When the subject image is guided to the focus plate 35 side, the main mirror 31 is provided obliquely in the subject light flux. At this time, the back surface of the main mirror holding frame 32 comes into contact with the main mirror eccentric pin 34, and the oblique angle of the main mirror 31 is defined. The main mirror eccentric pin 34 can adjust the position where it abuts on the main mirror holding frame 32 by rotating, and the oblique angle of the main mirror 31 can be accurately set. The focus plate 35 is disposed at a position conjugate with the light receiving surface of the image sensor 48. The subject image formed on the focus plate 35 is converted into an erect image by the pentaprism 36 and is observed by the user via the eyepiece optical system 37.

  An AE sensor 39 is disposed above the exit surface of the pentaprism 36, and an object image formed on the focusing plate 35 is formed on the light receiving surface of the AE sensor 39 via the pentaprism 36 and the photometric optical system 38. The next image is formed. The AE sensor 39 is a sensor that detects the illuminance distribution of the subject image, and is configured by two-dimensionally arranged photoelectric conversion elements.

  A region near the optical axis 11 of the main mirror 31 in the oblique state is formed as a half mirror, and a part of the incident subject luminous flux is transmitted therethrough. The transmitted subject light flux is reflected by the sub mirror 41 held by the sub mirror holding frame 42 that rotates in conjunction with the main mirror 31, and is guided to the AF optical system 45. The subject light flux that has passed through the AF optical system 45 enters the AF sensor 46. The AF sensor 46 is, for example, a plurality of photoelectric conversion element arrays that output phase difference signals from the received subject light flux.

  The sub mirror holding frame 42 rotates around a sub mirror rotation shaft 43 provided on the main mirror holding frame 32. In the oblique installation state, the back surface of the sub mirror holding frame 42 abuts on the sub mirror eccentric pin 44, and the oblique installation angle of the sub mirror 41 is defined. The sub mirror eccentric pin 44 can adjust the position where it abuts on the sub mirror holding frame 42 by rotating, and the oblique angle of the sub mirror 41 can be set accurately. When the main mirror 31 retracts from the subject light beam, the sub mirror 41 retracts from the subject light beam in conjunction with the main mirror 31.

  A focal plane shutter 47 and an image sensor 48 are arranged along the optical axis 11 behind the oblique main mirror 31. The focal plane shutter 47 is in an open state when the subject light beam is guided to the image sensor 48 and is in a shielded state at other times. The imaging element 48 is a photoelectric conversion element such as a CMOS sensor, for example, and converts the subject image formed on the light receiving surface into an electrical signal. The moving mechanism 49 is a mechanism that supports the image sensor 48 and moves the image sensor 48 in a plane orthogonal to the optical axis 11. The moving mechanism 49 will be described in detail later.

  The electrical signal photoelectrically converted by the image sensor 48 is processed into image data by the image processing unit 51 which is a DSP mounted on the main board 50. In addition to the image processing unit 51, a camera system control unit 52 that is an MPU that integrally controls the system of the camera unit 30 is mounted on the main board 50. The camera system control unit 52 manages the camera sequence and performs input / output processing of each component. For example, the exposure value is calculated from the illuminance distribution of the subject image output from the AE sensor 39, and focus control is performed from the phase difference signal output from the AF sensor 46.

  A rear display unit 53 such as a liquid crystal monitor is disposed on the rear surface of the camera unit 30, and a subject image processed by the image processing unit 51 is displayed. The rear display unit 53 displays various menu information, shooting information, and the like as well as a still image after shooting.

  The gyro sensor 54 detects angular acceleration applied to the single-lens reflex camera 10. The camera system control unit 52 drives the moving mechanism 49 based on the output of the gyro sensor 54 and cancels the shake applied to the single-lens reflex camera 10 during the period in which the image sensor 48 receives the subject image and accumulates the charge. To stabilize the subject image.

  The light emitting unit 55 is stored in the camera unit 30 when not in use, and is in use so that the light source unit 56 faces the subject when in use. The rotation from the storage state to the use state is executed by the camera system control unit 52 driving the light emitting unit rotation mechanism 57. For example, the camera system control unit 52 uses the actuator to release a locking member that restricts rotation in the biasing direction with respect to the light emitting unit 55 biased in the direction of use by the biasing spring. Realize the inverted position.

  The tripod detection sensor 58 is provided in the vicinity of the tripod hole 59 for attaching the tripod, and detects that the camera unit 30 is attached to the tripod. The camera unit 30 houses a detachable secondary battery 60 and supplies power to the lens unit 20 as well as the camera unit 30.

  FIG. 2 is a schematic diagram showing the configuration of the moving mechanism 49. The image sensor 48 is fixed to the Y movable frame 260, and Y rod sliding portions 201, 202, 203, and 204 are provided at the four corners of the Y movable frame 260. The Y rod sliding portions 201 and 202 are slidably fitted to the Y rod 211 fixed to the X movable frame 220, and the Y rod sliding portions 203 and 204 are similarly moved to the X movable frame 220. A sliding fit is performed on the fixed Y rod 212.

  X rod sliding portions 231, 232, 233, and 234 are provided at the four corners of the X movable frame 220. The X rod sliding portions 231 and 232 are slidably fitted to the X rod 241 fixed to the fixed frame 250, and the X rod sliding portions 233 and 234 are similarly fixed to the fixed frame 250. The X rod 242 is slidably fitted.

  The imaging element 48 configured as described above can move smoothly in the xy plane that is a plane orthogonal to the optical axis 11. Further, an X magnet 281 and a Y magnet 291 are fixed to the back surface of the Y movable frame 260. An X coil 282 is disposed away from the X magnet 281 at a position facing the X magnet 281, and a Y coil 292 is disposed away from the Y magnet 291 at a position facing the Y magnet 291. That is, the X magnet 281 and the X coil 282 form an X-VCM, and the Y magnet 291 and the Y coil 292 form a Y-VCM. The camera system control unit 52 can move the image sensor 48 in the x direction and the y direction by a target movement amount by controlling the direction and current value of the current flowing through the X coil 282 and the Y coil 292.

  The X movable frame 220 is provided with an X detection slit 272 that detects the amount of movement in the x direction, and the Y movable frame 260 is provided with a Y detection slit 271 that detects the amount of movement in the y direction. The projection light projected from the LEDs provided at the positions opposed to the respective slits passes through the X detection slit 272 and the Y detection slit 271 and is provided at the corresponding positions, respectively. Light is received by the PSD. The X-PSD has a light receiving surface that can detect the amount of movement of the image sensor 48 in the x direction, and the Y-PSD has a light receiving surface that can detect the amount of movement of the image sensor 48 in the y direction. Note that the Y detection slit 271 is formed with a predetermined width in the x direction so that the projection light reaches the Y-PSD even when the image sensor 48 moves in the x direction. Based on these outputs, the camera system control unit 52 detects the position of the image sensor 48 in the x direction and the y direction.

  The position sensor that detects the position of the image sensor 48 in the x direction and the y direction is not limited to PSD. For example, a Hall element may be provided in the vicinity of the center of each of the X coil 282 and the Y coil 292, and the position of the image sensor 48 may be detected by detecting a change in the magnetic field of the X magnet 281 and the Y magnet 291 that are opposed and relatively moved. it can.

  Further, even when the X coil 282 and the Y coil 292 are configured to be fixed to the back surface of the Y movable frame 260, the image pickup device 48 can be similarly moved. However, since the magnet has a larger mass than the coil, it is preferable to fix the magnet to the back surface of the Y movable frame 260 when an inertial force is applied by movement of the moving mechanism.

  A stopper 221 that restricts the movement of the Y movable frame 260 in the y direction is provided on the X movable frame 220. The stopper 221 is configured by, for example, a solenoid that advances and retreats in a direction that prevents the Y rod sliding portion 203 from proceeding. The camera system control unit 52 controls the movement of the Y movable frame 260 in the y direction as necessary by controlling the advancement and retraction of the stopper 221.

  FIG. 3 shows an operation in which the mirror portion constituted by the main mirror 31, the main mirror holding frame 32, the sub mirror 41 and the sub mirror holding frame 42 rotates from the oblique state to the retracted state, and a moving mechanism 49 that holds the image sensor 48. It is a schematic diagram which shows the relationship of operation | movement. In the mirror up operation in which the mirror portion rotates from the oblique state to the retracted state, the main mirror holding frame 32 that holds the main mirror 31 rotates around the main mirror rotation shaft 33 and moves away from the main mirror eccentric pin 34. This is the operation until it collides with the inner wall 301 of the mirror box and stops. This operation is accompanied by a rotation operation of the sub mirror holding frame 42 that holds the sub mirror 41 and rotates around the sub mirror rotation shaft 43 provided in the main mirror holding frame 32.

  Since the mirror unit rotating from the oblique state to the retracted state is executed in a short time from the release instruction by the user until the image sensor 48 starts to accumulate charges, it is usually performed at a high speed. . Since the mirror part is composed of a plurality of elements as described above and has a constant mass, an impact force is generated when the mirror part rotating at high speed collides with the inner wall 301. Due to this striking force, an inertial force is generated in the single-lens reflex camera 10. This phenomenon is so-called mirror shock, and the user feels that the entire single-lens reflex camera 10 swings in the mirror up direction. This shaking causes discomfort to the user holding the single-lens reflex camera 10 and causes image blurring with respect to charge accumulation of the image sensor 48.

  Therefore, in the present embodiment, at least a part of this inertial force is canceled by using the moving mechanism 49 that normally operates as a camera shake correction mechanism, and the shake of the single-lens reflex camera 10 is reduced. That is, the camera system control unit 52 moves the Y movable frame 260 that holds the image sensor 48 in the arrow 312, that is, in the −y direction in synchronization with the mirror that rotates in the direction of the arrow 311. In particular, the camera system control unit 52 controls the Y movable frame 260 to collide with the moving end so as to coincide with the timing at which the main mirror holding frame 32 collides with the inner wall 301. Further, the camera system control unit 52 determines the moving speed of the Y movable frame 260 so that both of the striking powers coincide with each other. By such control, the overall shaking of the single-lens reflex camera 10 due to the mirror shock can be greatly reduced.

  FIG. 4 is a schematic diagram showing a relationship between the operation of the mirror unit rotating from the retracted state to the obliquely installed state and the operation of the moving mechanism 49 that holds the image sensor 48. The mirror-down operation in which the mirror portion rotates from the retracted state to the obliquely installed state is an operation until the main mirror holding frame 32 rotates around the main mirror rotating shaft 33 and collides with the main mirror eccentric pin 34 and stops. It is. This operation also involves a rotation operation of the sub mirror holding frame 42 that rotates around the sub mirror rotation shaft 43.

  Considering the case of continuous shooting, the shorter the period for shifting to the next shooting operation, the better. Therefore, the mirror down operation is usually performed at high speed. At this time, since the main mirror holding frame 32 collides with the main mirror eccentric pin 34 and the sub mirror holding frame 42 collides with the sub mirror eccentric pin 44, a striking force is generated as in the mirror up operation. Therefore, a mirror shock occurs even during the mirror down operation, and the user feels that the entire single-lens reflex camera 10 is shaken in the mirror down direction.

  Therefore, at the time of mirror down, as in the case of mirror up, at least a part of this inertial force is canceled using the moving mechanism 49 to reduce the shaking of the single-lens reflex camera 10. That is, the camera system control unit 52 moves the Y movable frame 260 that holds the image sensor 48 in the direction of the arrow 314, that is, in the + y direction in synchronization with the mirror that rotates in the direction of the arrow 313. In particular, the camera system controller 52 determines that the Y movable frame 260 matches the timing at which the main mirror holding frame 32 collides with the main mirror eccentric pin 34 or the timing at which the sub mirror holding frame 42 collides with the sub mirror eccentric pin 44. Is controlled to collide with the moving end. In addition, the camera system control unit 52 determines the moving speed of the Y movable frame 260 so that both of the striking powers coincide in the component in the same direction. Such control can greatly reduce the shaking generated by the y-direction component of the inertial force generated in association with the mirror down operation.

  FIG. 5 is a block diagram schematically showing a system configuration relating to the movement processing of the movement mechanism 49. That is, a system configuration in the case where the moving mechanism 49 is used as a camera shake correction mechanism and in the case where it is used as the above-described inertial force canceling mechanism is shown. A system related to processing is configured by a sensor system, a drive system, and the like connected to a camera system control unit 52 as an arithmetic processing unit.

  First, the flow of processing when the moving mechanism 49 is used as a camera shake correction mechanism will be described. The shake applied to the single-lens reflex camera 10 is detected by the gyro sensor 54 as angular velocity signals around the x axis and around the y axis. The output signal from the gyro sensor 54 is filtered by an LPF 501 that removes a high frequency component and extracts a signal in a camera shake frequency region, and is further converted into a digital signal by an A / D converter 502 and taken into the camera system control unit 52. It is. The signal captured by the camera system control unit 52 is converted from an angular velocity signal into an angular signal by the integration processor 503 and filtered by the HPF 504 in which an appropriate time constant is set so as to reduce the influence of drift of the gyro sensor 54 and the like. Is done.

  The target position processing unit 505 acquires the output of the X-PSD 521 and the Y-PSD 522 and the conversion coefficient information of the conversion coefficient output unit 506 together with the shake signal filtered by the HPF 504. The outputs of the X-PSD 521 and the Y-PSD 522 are outputs indicating the current positions of the image sensor 48 in the x direction and the y direction, respectively. The target position processing unit 505 is based on these output values. Calculate the current position. Also, the conversion coefficient output unit 506 takes in release information, zoom information, and the like from the shooting condition transmission unit 507, and outputs a coefficient suitable for the shooting conditions. Then, the target position processing unit 505 generates a displacement signal from the shake signal acquired from the gyro sensor 54 in consideration of the current position of the image sensor 48 and a predetermined coefficient.

  The follow-up control unit 508 converts the displacement signal of the image sensor 48 generated by the target position processing unit 505 into control signals for the X-VCM 531 and the Y-VCM 532. The control signal converted by the tracking control unit 508 is converted into an analog signal by the D / A converter 509 and sent to the drive driver 510. Then, the drive driver 510 performs processing such as amplification on the input analog signal, and drives the X-VCM 531 and the Y-VCM 532 independently. With the above operation, the image sensor 48 is driven in a direction opposite to the image blur causing image blur, and the image blur of the subject image formed on the light receiving surface of the image sensor 48 is suppressed.

  Next, the flow of processing when the moving mechanism 49 is used as an inertial force canceling mechanism will be described. Based on the mirror rotation timing information acquired from the drive condition transmission unit 511, the attitude information of the single-lens reflex camera 10, and the user setting information, the inertial force control unit 512 of the Y movable frame 260 that holds the image sensor 48 is obtained. Determine the movement speed and movement start time. Then, control signals for X-VCM 531 and Y-VCM 532 are generated according to the determined moving speed and moving start timing. The generated control signal is converted into an analog signal by the D / A converter 509 and sent to the drive driver 510. Then, the drive driver 510 performs processing such as amplification on the input analog signal to drive the Y-VCM 532. With the above operation, it is possible to greatly reduce the shaking generated by the inertial force generated with the rotation operation of the mirror portion.

  Next, a sequence from the user's release ON instruction to the end of the shooting operation will be described. FIG. 6 is a timing chart showing transition of mechanical operation. The operation of each element is controlled by the camera system control unit 52.

  When the user generates a release ON signal by depressing the shutter button, the mirror unit starts a mirror up operation from the oblique state to the retracted state. Then, the Y movable frame 260 to which the image sensor 48 is fixed is moved to collide with the moving end in accordance with the timing at which the mirror unit collides with the inner wall 301 of the mirror box. At this time, the moving direction of the Y movable frame 260 is the -y direction. By this operation, at least a part of the inertia force accompanying the mirror up operation is canceled.

  After canceling the inertial force, the centering operation is performed so that the center of the image sensor 48 coincides with the optical axis 11 by using the time for the bounce operation of the mirror portion to converge. When the bounce operation of the mirror part is converged and the centering operation of the image sensor 48 is completed, the front curtain of the focal plane shutter 47 starts to travel. Then, after the time corresponding to the set shutter speed has elapsed, the running of the trailing curtain is started. The image sensor 48 receives a subject image in a slit formed between the travel of the front curtain and the travel of the rear curtain, and accumulates electric charges.

  At least during the charge accumulation period from the time when the front curtain exposes the effective pixel area of the image sensor 48 to the time when the rear curtain shields the effective pixel area, the moving mechanism 49 is operated as a camera shake correction mechanism. Thereby, even if the single-lens reflex camera 10 is shaken due to camera shake, a stable subject image in which shake is suppressed is formed on the light receiving surface of the image sensor 48 during the charge accumulation period.

  When the charge accumulation of the image sensor is completed, the mirror unit starts a mirror down operation from the retracted state to the oblique state. Then, the Y movable frame 260 to which the image sensor 48 is fixed is moved to collide with the moving end in accordance with the timing at which the mirror unit collides with the main mirror eccentric pin 34, for example. At this time, the moving direction of the Y movable frame 260 is the + y direction. By this operation, at least a part of the inertial force accompanying the mirror down operation is canceled.

  During this time, the shutter charge of the front curtain and the rear curtain of the focal plane shutter 47 is performed. When a series of shooting operations are completed in this manner, the process waits until a release ON signal for instructing the next shooting is generated.

  By the control of the moving mechanism 49 described above, it is possible to significantly reduce the shaking of the single-lens reflex camera 10 due to the mirror shock. Next, a configuration for further reducing shaking will be described.

  As described above, the single-lens reflex camera 10 is configured by mounting the lens unit 20 on the camera unit 30. That is, the lens unit 20 can be exchanged for the camera unit 30, and the user uses different lens units 20 having different focal lengths, open aperture values, and the like according to the purpose of shooting. If the focal length, the aperture value, etc. are different, the size and weight of the lens unit 20 are also different. Then, a difference also appears in the inertial force generated by the rotation operation of the mirror unit.

  The camera system control unit 52 acquires lens information from the lens unit 20 via the lens mount 22 and the camera mount 61 when the lens unit 20 is attached. For example, when acquiring the weight and center of gravity information of the lens, the camera system control unit 52 predicts the shake caused by the mirror shock in consideration of the weight and center of gravity information of the camera unit 30. Then, the control parameter of the moving mechanism 49 is changed.

  Accessories attached to the camera unit 30 are not limited to the lens unit 20. As other examples, an external light emitting unit, an external battery pack unit, and the like are assumed. However, the camera system control unit 52 acquires information on the accessory to be attached and changes the control parameter of the moving mechanism 49.

  As a configuration for more accurately predicting the shake caused by the mirror shock, a configuration that considers the posture information of the single-lens reflex camera 10 is also conceivable. As described above, when the single-lens reflex camera 10 is gripped in the lateral position, the rotation of the mirror unit is along the direction of gravity. At this time, the gravity works in the direction to relieve the mirror shock for the mirror up operation, and the gravity works in the direction for increasing the mirror shock for the mirror down operation. On the other hand, when the single-lens reflex camera 10 is held in the vertical position, the mirror is rotated in a plane perpendicular to the gravity, so that the intensity of the mirror shock is not affected. Therefore, the camera system control unit 52 detects whether the single-lens reflex camera 10 is held in the horizontal position or the vertical position by the attitude sensor, corrects the prediction of the shake caused by the mirror shock, and moves the moving mechanism. 49 control parameters are changed.

  In addition, as another configuration for more accurately predicting the shake caused by the mirror shock, a configuration that considers information on whether or not the single-lens reflex camera 10 is fixed to a tripod can be considered. As described above, when the single-lens reflex camera 10 is held by the user, it is considered that a large shake is generated due to the generated inertial force. However, when the single-lens reflex camera 10 is fixed to a tripod, shaking is suppressed. Therefore, the camera system control unit 52 detects whether or not the single-lens reflex camera 10 is fixed to the tripod by the tripod detection sensor 58, corrects the prediction of the shake caused by the mirror shock, and sets the control parameter of the moving mechanism 49. change. In particular, in a situation where shooting is performed with the single-lens reflex camera 10 fixed to a tripod, there is a case where it is not desired to generate even a slight shake, so the moving mechanism 49 is controlled so as to cancel such a shake.

  In the above description, the moving mechanism 49 that moves the image sensor 48 is used as a moving mechanism that cancels the mirror shock. However, any moving mechanism built in the camera unit 30 and having a certain mass can be used in the same manner. For example, the rotation between the housed state and the used state of the light emitting unit 55 can be used. For example, the camera system control unit 52 pops up the light emitting unit 55 in synchronization with the mirror down operation of the mirror unit. Even by such control, at least a part of the inertial force accompanying the rotation operation of the mirror portion can be canceled.

  Further, in the above description, a configuration is adopted in which the moving portion of the moving mechanism is caused to collide with the moving end so as to cancel out the impact force caused by the collision of the mirror portion as a cause of the generation of inertial force. However, although it is relatively small with respect to the striking force, when it is desired to suppress the generation of inertial force due to the centrifugal force during the rotation of the mirror part, the acceleration of the moving part in the moving mechanism may be controlled. Thereby, the shake of the single-lens reflex camera 10 can be suppressed more.

  Further, the control of the moving mechanism 49 may be changed according to the set shooting mode and shooting conditions. For example, when the continuous shooting mode is set, the moving mechanism 49 is not used as the inertial force canceling mechanism because the centering time of the image sensor 48 is desired to be omitted.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

10 single lens reflex camera, 11 optical axis, 20 lens unit, 21 lens group, 22 lens mount, 30 camera unit, 31 main mirror, 32 main mirror holding frame, 33 main mirror rotation axis, 34 main mirror eccentric pin, 35 focus plate , 36 Penta prism, 37 Eyepiece optical system, 38 Photometric optical system, 39 AE sensor, 41 Sub mirror, 42 Sub mirror holding frame, 43 Sub mirror rotation axis, 44 Sub mirror eccentric pin, 45 AF optical system, 46 AF sensor, 47 Focal plane shutter , 48 Image sensor, 49 Moving mechanism, 50 Main board, 51 Image processing unit, 52 Camera system control unit, 53 Rear display unit, 54 Gyro sensor, 55 Light emitting unit, 56 Light source unit, 57 Light emitting unit rotating mechanism, 58 Tripod Detection sensor, 59 tripod 60, secondary battery, 61 camera mount, 201, 202, 203, 204 Y rod sliding part, 211, 212 Y rod, 220 X movable frame, 221 stopper, 231, 232, 233, 234 X rod sliding part, 241 and 242 X rod, 250 fixed frame, 260 Y movable frame, 271 Y detection slit, 272 X detection slit, 281 X magnet, 282 X coil, 291 Y magnet, 292 Y coil, 301 inner wall, 311, 312, 313, 314 arrow, 501 LPF, 502 A / D converter, 503 integration processor, 504 HPF, 505 target position processing unit, 506 conversion coefficient output unit, 507 imaging condition transmission unit, 508 tracking control unit, 509 D / A converter , 510 drive driver, 511 drive condition transmitter, 512 inertia force Control unit, 521 X-PSD, 522 Y-PSD, 531 X-VCM, 532 Y-VCM

Claims (10)

A mirror that rotates between a first state for guiding the subject image to the viewfinder optical system and a second state for guiding the subject image to the imaging surface;
A moving unit capable of moving in a direction having at least a component in a direction in which the mirror unit rotates between the first state and the second state;
An imaging device comprising: a control unit that moves the moving unit so as to cancel at least a part of an inertia force generated when the mirror unit rotates from the first state to the second state or from the second state to the first state. apparatus.   The imaging apparatus according to claim 1, wherein the moving unit includes an imaging element.   The imaging apparatus according to claim 2, wherein the control unit returns the imaging device to the center of the optical axis of the subject image before the imaging device starts charge accumulation.   The image pickup apparatus according to claim 2, wherein the control unit moves the image pickup element so as to cancel a shake applied to the image pickup apparatus when the image pickup element performs charge accumulation.   The imaging device according to claim 1, wherein the moving unit is a light emitting unit capable of taking a storage state and a use state with respect to the imaging device.   The imaging apparatus according to claim 1, further comprising a stopper that can take a restricted state that restricts movement of the moving unit and a retracted state that does not prevent movement.   The imaging device according to claim 1, wherein the control unit changes movement control of the moving unit according to an accessory attached to the imaging device.   The imaging apparatus according to claim 7, wherein the accessory is an interchangeable lens, and the control unit changes movement control of the moving unit based on information obtained from the interchangeable lens. An attitude sensor for detecting the attitude of the imaging device;
The imaging device according to claim 1, wherein the control unit changes movement control of the moving unit based on an output of the attitude sensor. A tripod detection sensor for detecting whether the imaging device is fixed to a tripod;
The imaging device according to claim 1, wherein the control unit changes movement control of the moving unit based on an output of the tripod detection sensor.

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