JP4385756B2 - Camera with image stabilization function - Google Patents

Camera with image stabilization function Download PDF

Info

Publication number
JP4385756B2
JP4385756B2 JP2003418422A JP2003418422A JP4385756B2 JP 4385756 B2 JP4385756 B2 JP 4385756B2 JP 2003418422 A JP2003418422 A JP 2003418422A JP 2003418422 A JP2003418422 A JP 2003418422A JP 4385756 B2 JP4385756 B2 JP 4385756B2
Authority
JP
Japan
Prior art keywords
stage
camera
camera shake
shake correction
correction function
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2003418422A
Other languages
Japanese (ja)
Other versions
JP2005184122A (en
Inventor
昌美 関
Original Assignee
株式会社ニコン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ニコン filed Critical 株式会社ニコン
Priority to JP2003418422A priority Critical patent/JP4385756B2/en
Publication of JP2005184122A publication Critical patent/JP2005184122A/en
Application granted granted Critical
Publication of JP4385756B2 publication Critical patent/JP4385756B2/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Description

  The present invention relates to a camera having a camera shake correction function.

  In digital still cameras, digital video cameras, and the like, image blur caused by camera shake at the time of shooting is a problem. In order to correct this camera shake, an image pickup apparatus is known in which two sliders that are movable in two directions perpendicular to the optical axis and perpendicular to each other are combined, and an image pickup device used for shooting is installed on the combined slider. (Patent Document 1). In this image pickup apparatus, by moving two sliders, the image pickup element is moved in a direction to cancel the camera shake, thereby correcting the camera shake.

JP 2003-110919 A

  The imaging apparatus disclosed in Patent Document 1 is provided with guide grooves for determining the moving directions of the two sliders, and the two sliders move in two directions orthogonal to each other along the grooves. To do. However, in terms of machining accuracy when machining the groove, the moving direction of the slider cannot be made completely orthogonal, and blurring caused by groove play or the like cannot be completely removed. Therefore, when the slider is moved in order to correct camera shake, another new image blur occurs.

The camera with a camera shake correction function according to the first aspect of the present invention includes a stage capable of moving in a plane perpendicular to the optical axis of the incident light beam and rotating about an axis intersecting the plane, and is fixed to the stage. An image sensor that captures a subject image, a detection unit that detects a blur amount generated in the subject image, and a movement rotation unit that moves and / or rotates the stage and the image sensor so as to correct the blur amount detected by the detection unit. And a ball member provided between the surface opposite to the surface on which the imaging device of the stage is fixed and the surface of the camera body, and provided on the surface side of the camera body with respect to the stage. An urging member that holds the stage along a plane by urging toward the surface side of the body is provided.
The invention of claim 2 is the image stabilization function camera as claimed in claim 1, an imaging device is to move and / or rotate along a plane perpendicular to the optical axis of the incident light beam.
The invention according to claim 3, in any of the camera shake correction function camera as claimed in claim 1-2, the rotating transportation unit comprises a first direction, the second and parallel to each other and perpendicular to the first direction By driving the stage in the direction 3, the stage and the image sensor are moved and / or rotated.
According to a fourth aspect of the present invention, in the camera with a camera shake correction function according to the third aspect , the moving and rotating means drives the stage in first, second and third directions, respectively. Each of the first, second, and third drive parts drives a stage within the same plane.
According to a fifth aspect of the present invention, in the camera with a camera shake correction function according to any one of the first to fourth aspects, the moving and rotating means has a voice coil motor, and the stage and the image sensor are moved and / or rotated by the voice coil motor. Is.
According to a sixth aspect of the present invention, in the camera with a camera shake correction function according to any one of the first to fifth aspects, the camera further includes position detection means for detecting the position and rotation state of the stage, and the moving rotation means is detected by the position detection means. The stage and the image sensor are moved and / or rotated based on the position and / or rotation state of the stage.

According to the present invention, there is provided a stage that can move in a plane perpendicular to the optical axis of the incident light beam and rotate around an axis that intersects the plane, and the amount of blur of the subject image caused by camera shake is detected by the detection means. Thus, the stage and the image sensor are moved and / or rotated so as to correct the detected blur amount. Since it did in this way, camera shake can be correct | amended, without producing another new image blur by moving an image pick-up element.

-First embodiment-
FIG. 1 shows a camera with a camera shake correction function according to an embodiment of the present invention. This camera with a camera shake correction function (hereinafter referred to as this camera) fixes an image sensor on a movable and rotatable stage, and moves and / or rotates the stage to move the image sensor to correct camera shake. It is. 1A is a schematic diagram of the internal structure when the camera is viewed from the front, and FIG. 1B is a schematic diagram of the internal structure when viewed from the side. A lens 2 having a lens optical axis 1 is attached to the camera body 3 and guides a light beam from a subject into the camera body 3.

  A subject image is formed on the image sensor 4 fixed on the stage 5 by the light beam incident from the lens 2. The image sensor 4 captures the subject image and outputs an image signal to an image calculation unit (not shown). The captured image thus obtained is subjected to various kinds of image processing in the image calculation unit and then recorded as image data in a recording unit (not shown). Note that the image pickup device 4 is disposed on the stage 5 so that the center is positioned on the lens optical axis 1 when the camera shake correction function described later is not executed. An image sensor such as a CCD or a CMOS is used for the image sensor 4.

  When image capturing is performed as described above, if a user's hand shake occurs during exposure, the subject image is blurred on the image sensor 4 and an original captured image cannot be obtained. Such subject image blur due to camera shake becomes more prominent as the exposure time is longer and the imaging magnification is larger. This camera has a function of correcting the camera shake and preventing the blur of the subject image by moving the image sensor 4 during imaging so as to cancel such a camera shake. The operation of each component for realizing the camera shake correction function will be described below.

  The sensors 6a, 6b, and 6c are angular velocity sensors for detecting the amount of camera shake, that is, the amount of camera shake that occurs in the subject image formed on the image sensor 4. The sensor 6a is a pitching sensor and detects a rotational angular velocity θx ′ about the X axis as a pitching amount. The sensor 6b is a yawing sensor and detects a rotational angular velocity θy ′ around the Y axis as a yawing amount, and the sensor 6c as a rolling sensor detects a rotational angular velocity θz ′ around the Z axis (lens optical axis 1) as a rolling amount. Is detected. Here, each axis has the orientation shown in FIG. 1 and is defined as follows. The lens optical axis 1 is the Z-axis, and the two coordinate axes perpendicular to the Z-axis and perpendicular to each other are the X-axis and the Y-axis, and the horizontal direction when the camera is held sideways (the left-right direction in FIG. 1A) Is defined as the X axis, and the coordinate axis in the vertical direction (the vertical direction in FIG. 1A) is defined as the Y axis.

  For the sensors 6a to 6c, for example, vibration gyros are used. The vibration gyro detects the angular velocity of rotation by detecting the amount of strain caused by the Coriolis force generated when the vibrating body rotates. For example, by using a rectangular parallelepiped having a piezoelectric element attached to the side surface as a vibrating body, and measuring the voltage value generated by the piezoelectric effect on the piezoelectric element, the amount of strain can be detected to determine the rotational angular velocity. The sensors 6a to 6c are not limited to vibration gyros, but may be other than that.

  The stage 5 on which the image sensor 4 is arranged is movably supported in a plane perpendicular to the lens optical axis 1 by three balls 9a, 9b and 9c. The balls 9a to 9c are attached to the stage 5 so that the balls 9a to 9c can be rotated in place while being fixed in position, whereby the stage 5 is provided on the bottom surface of the camera body 3 provided perpendicular to the lens optical axis 1. Can move smoothly along. With such a support structure, the stage 5 and the image sensor 4 can freely move and rotate along a plane perpendicular to the lens optical axis 1. Here, three support points are determined using the three balls 9a to 9c, and thereby the plane on which the stage 5 moves is determined. However, if at least three support points are determined, one plane is determined. Can be determined.

  It should be noted that the stage 5 is mechanically clamped to the camera body 3 at the time of normal photographing where the camera shake correction function is not executed. At this time, the stage 5 and the image sensor 4 are fixed at the center position of the movable range. When the camera shake correction function is executed, the clamp is released, and the positions and rotational states of the stage 5 and the image sensor 4 are controlled as described later.

  By being pulled by the tension spring 10, the stage 5 is urged in a direction in which the stage 5 is attracted toward the bottom surface of the camera body 3. Accordingly, the stage 5 and the image sensor 4 can be held along a plane perpendicular to the lens optical axis 1 regardless of the posture. It should be noted that when various circuit components (not shown) fixed to the camera body 3 are connected to the stage 5 and the image sensor 4 by wiring, the wiring length is set to prevent the wiring from being cut by movement or rotation. A flexible wiring material with a margin is used.

  The stage 5 is connected to three voice coil motors (VCM) 7a, 7b and 7c, and when these are driven, their positions and rotational states change as will be described later. Inside the voice coil motors 7a to 7c, coils 71a, 71b and 71c are provided, which are respectively fixed to arms 11a, 11b and 11c extending from the stage 5. In addition, since Fig.1 (a) has shown the cross section so that the inside of the voice coil motors 7a-7c can be understood, it seems that the coils 71a-71c are outside the voice coil motors 7a-7c, respectively. However, in reality, the voice coil motors 7a to 7c are structured to sandwich the internal coils 71a to 71c from both sides.

  The operation of the voice coil motors 7a to 7c will be described with reference to a schematic structural diagram of the voice coil motor 7 shown as a typical example in FIG. 2A is a side sectional view of the voice coil motor 7, and FIG. 2B is a perspective view of a coil 71 provided therein. As shown in FIG. 2A, the voice coil motor 7 has a structure in which a coil 71 is sandwiched between magnets 72-75. On the upper side of the coil 71, magnets 72 and 73 whose magnetic pole positions are opposite to each other are arranged at positions where the circular rings of the coil 71 face each other. Similarly, magnets 74 and 75 whose magnetic pole positions are opposite to each other are disposed below the coil 72. The magnets 72 and 74 and the magnets 73 and 75 facing each other across the coil 72 have opposite polarities at the respective facing positions.

  When a current is passed through the coil 71, a Lorentz force is generated in either the left or right direction of FIG. The direction of the Lorentz force at this time can be switched according to the direction of the current as described below. When a current is passed in the direction indicated by the arrow in FIG. 2B, Lorentz force is generated in the left direction in FIG. 2A, and the coil 71 moves in that direction. If the direction in which the current flows is reversed, the coil 71 moves in the direction on the right side of FIG. In this way, the coil 71 can be driven in a one-dimensional direction and its position can be controlled.

  The voice coil motor having the structure as described above can be driven even if the position of the coil is deviated from the driving direction. The voice coil motors 7a to 7c in FIG. 1 can move the stage 5 and the image sensor 4 to arbitrary positions in the plane and rotate them to arbitrary angles as will be described below. Since the voice coil motor also has a feature of high-speed driving without contact, this point is also suitable for realizing the camera shake correction function of the present invention.

  The driving directions of the voice coil motors 7a to 7c are indicated by arrows 70a, 70b and 70c in FIG. The voice coil motor 7a drives the arm 11a in the horizontal direction (X-axis direction) in the figure, and the voice coil motors 7b and 7c drive the arms 11b and 11c in the vertical direction (Y-axis direction) in the figure, respectively. By combining these driving directions and driving amounts, the stage 5 can be moved to an arbitrary position in the XY plane and can be rotated to an arbitrary angle around the Z axis. In this way, by driving the stage 5 in three directions, the stage 5 and the image sensor 4 can be moved and rotated to an arbitrary position and angle in the XY plane perpendicular to the Z axis.

  As an example, FIG. 3 shows a state in which the stage 5 is rotated about the Z axis by an angle θz without changing the position in the XY plane from the original position. At this time, the voice coil motors 7b and 7c are driven in the opposite directions by the same driving amount without driving the voice coil motor 7a, so that the position of the stage 5 is not changed. Then, the drive amounts of the voice coil motors 7b and 7c are controlled so that the inclination angle of the stage 5 becomes θz.

  When the stage 5 is driven in three directions as described above, the stage 5 is moved in the plane as long as the second driving direction and the third driving direction intersect with the first driving direction. Can be moved and rotated to any position and angle. However, as shown in FIG. 1A, the first drive direction (drive direction of the arm 11a), the second drive direction (drive direction of the arm 11b), and the third drive direction (drive direction of the arm 11c). ), And the second and third driving directions are preferably parallel to each other. By doing in this way, the controllability in the position control of the stage 5 can be improved. Further, at this time, it is preferable to arrange the arms 11a to 11c in the same plane and drive the stage 5 in the plane. By doing in this way, the drive mechanism part can be reduced in size and space efficiency can be improved.

  As described above, when the stage 5 is moved and rotated, the position sensors 8a, 8b and 8c detect the position change amount of the stage 5, that is, the driving amounts of the voice coil motors 7a to 7c, and based on the detection result. The voice coil motors 7a to 7c are controlled. The position sensors 8a to 8c are configured to detect the position change amount of the stage 5 (driving amounts of the voice coil motors 7a to 7c) by measuring the position change amounts of the arms 12a, 12b and 12c. Yes. In addition, in FIG. 1 (a) and FIG. 3, since the cross section is shown so that the inside of the position sensors 8a-8c can be understood, it seems that the arms 12a-12c are outside the position sensors 8a-8c, respectively. However, in practice, as shown in FIG. 1B, the arms 12a to 12c are sandwiched from both sides by the position sensors 8a to 8c.

  The arms 12a to 12c are attached to positions opposite to the stage 5 with respect to the arms 11a to 11c respectively driven by the voice coil motors 7a to 7c. The position sensor 8a measures the position change amount of the arm 12a in the X-axis direction, and the position sensors 8b and 8c measure the position change amounts of the arms 12b and 12c in the Y-axis direction, respectively. That is, the position sensors 8a to 8c are sensors that respectively measure the amount of change in position in the one-dimensional direction of the stage 5, and the direction of change in the position measured by each of the position sensors 8a to 8c is driven by the voice coil motors 7a to 7c. It corresponds to the direction.

  For the position sensors 8a to 8c, for example, PSD (Position Sensitive Detector) can be used. The PSD is a position detection sensor that uses the surface resistance of a photodiode, and measures the amount of position change by electrically detecting the change in the center of gravity of the light spot on the light receiving surface. Here, a one-dimensional PSD that measures a positional change amount in a one-dimensional direction can be used. As a result, even when the stage 5 is rotating around the Z axis, it is possible to measure the amount of change in position in the one-dimensional direction of the arms 12a to 12c, that is, the driving amount of the voice coil motors 7a to 7c.

  As described above, instead of using the three one-dimensional position sensors 8a to 8c, one two-dimensional position sensor capable of measuring a position change in the two-dimensional direction and one one-dimensional or two-dimensional position. A combination with a sensor may also be used. In addition to PSD, a one-dimensional position sensor that can measure the amount of change in position, such as an optical or magnetic encoder, may be used. As long as the amount of movement of the stage 5 in the X-axis and Y-axis directions and the rotation angle around the Z-axis can be detected, the camera shake correction function of the present invention can be realized regardless of what is used.

  By using each configuration as described above, it is possible to detect the amount of camera shake during imaging and to move and / or rotate the stage 5 according to the detected amount. As a result, it is possible to realize the camera shake correction function of the present invention by moving the image sensor 4 during imaging so as to cancel camera shake. When the camera shake correction function is being executed, the corrected subject image obtained by the image sensor 4 is displayed on an electronic display device such as a liquid crystal monitor or an electronic viewfinder (not shown), thereby reducing the camera shake correction effect. Can be confirmed.

FIG. 4 is a control block diagram of the above-described camera shake correction function. The rotational angular velocities θx ′, θy ′, and θz ′ detected by the pitching sensor 6a, the yawing sensor 6b, and the rolling sensor 6c are output to the camera shake correction calculation unit 13. Based on the rotation angular velocities θx ′, θy ′, and θz ′, the camera shake correction calculation unit 13 calculates the drive amounts of the voice coil motors 7 a to 7 c and outputs the calculation results to the control unit 14. At this time, each driving amount is calculated so that the stage 5 moves by the moving amounts x, y, and θz respectively represented by the following equations (1) to (3). x and y are movement amounts in the X-axis direction and the Y-axis direction, respectively, and θz is a rotation angle around the Z-axis.
x = f · θy ′ · Δt (1)
y = f · θx ′ · Δt (2)
θz = − (θz ′ · Δt) (3)

  Δt in the equations (1) to (3) is an output cycle of the rotational angular velocities θx ′, θy ′, and θz ′ in the sensors 6 a to 6 c. That is, by multiplying θx ′, θy ′, and θz ′ by Δt, a value corresponding to the integral value is calculated. Further, f is the distance from the rear principal point of the lens 2 to the focal point, that is, the focal distance, and is obtained from the zoom position of the lens 2 and the distance information of the subject.

  The above formulas (1) to (3) represent that the stage 5 is moved in the direction in which the subject image on the image sensor 4 is blurred due to camera shake. Here, since the subject image is imaged on the image sensor 4 with the top, bottom, left, and right being inverted, the same direction as the movement of camera shake is the direction in which the subject image is blurred. As for θz, the direction opposite to the movement of the camera shake is the direction in which the subject image is blurred. In this way, the stage 5 is moved based on the calculated movement amount so that the positional relationship between the subject image and the image sensor 4 is maintained.

  The control unit 14 controls driving of the voice coil motors 7a to 7c in accordance with the driving amount output from the camera shake correction calculation unit 13. At this time, feedback control is performed based on the position information of the stage 5 detected by the position sensors 8a to 8c. The camera shake correction calculation unit 13 and the control unit 14 are realized by a CPU (not shown) provided in the camera body 3.

According to the embodiment described above, the following operational effects can be obtained.
(1) By detecting the rotational angular velocities θx ′, θy ′, and θz ′ using the sensors 6a to 6c, the blur amount of the subject image caused by camera shake is detected, and the voice coil motor 7a is based on the detected blur amount. By controlling the driving direction and driving amount of .about.7c, the stage 5 and the image sensor 4 are moved and / or rotated in the direction of correcting the blur amount of the subject image. Since it did in this way, camera shake can be correct | amended, without producing another new image blur by moving an image pick-up element.

(2) Since the stage 5 and the image sensor 4 are moved and / or rotated along a plane perpendicular to the lens optical axis 1, camera shake occurs while maintaining a constant distance between the lens and the image sensor. Correction can be performed, and re-adjustment of the focus is not necessary.

(3) Since the stage 5 is urged by the tension spring 10, the stage and the image sensor can be held along a plane perpendicular to the lens optical axis regardless of how the posture of the camera changes.

(4) The stage is obtained by driving the arm 11a in the X-axis direction using the voice coil motor 7a and driving the arms 11b and 11c in the Y-axis direction parallel to each other using the voice coil motors 7b and 7c. 5 and the image sensor 4 are moved and / or rotated. Since it did in this way, when moving a stage and an image pick-up element to arbitrary positions and angles and rotating, the controllability in the position control can be improved.

(5) The stage 5 is supported by the balls 9 a to 9 c so that the stage 5 can move smoothly along the bottom surface of the camera body 3. Since it did in this way, a camera shake correction function can be realized with a simple structure, and space efficiency can be improved. Furthermore, if the arms 11a to 11c are arranged in the same plane and the stage 5 is driven in that plane, the space efficiency can be further improved.

(6) The stage 5 and the image sensor 4 are moved and / or rotated using the voice coil motors 7a to 7c. Since it did in this way, while moving a stage and an image pick-up element to the arbitrary positions in a plane and rotating to an arbitrary angle, the high-speed drive by non-contact is also attained.

(7) The stage 5 is detected by detecting the position and / or rotation state of the stage 5 using the position sensors 8a to 8c, and controlling the driving amount and driving direction of the voice coil motors 7a to 7c based on the detection result. The image pickup device 4 is moved and / or rotated. Since it did in this way, the stage 5 and the image pick-up element 4 can be moved and rotated correctly using feedback control.

  In the above embodiment, the amount of blur of the subject image caused by camera shake is detected by detecting the rotational angular velocities θx ′, θy ′, and θz ′ around the respective axes using the sensors 6a to 6c. However, the present invention is not limited to this content, and the amount of blur of the subject image due to camera shake can be detected by various methods. For example, the blur amount of the subject image due to camera shake can also be detected by detecting the acceleration in each axial direction with an acceleration sensor.

-Second embodiment-
The camera with a camera shake correction function of each embodiment described below is a camera shake correction according to the present invention by moving and / or rotating the stage 5 by a driving method different from that of the first embodiment shown in FIG. The function is realized. First, a second embodiment whose schematic diagram of the internal structure is shown in FIG. 5 will be described. In the present embodiment, linear actuators 18a to 18c, bearings 19a to 19c, and wedge-shaped inclined guides 20a to 20c are provided instead of the voice coil motors 7a to 7c of FIG. By using these in combination with each other, the stage 5 can be moved and rotated in accordance with the amount of camera shake to be corrected, as described in the first embodiment. Note that the same parts as those of the first embodiment are not shown in FIG. 5 and further description thereof is omitted.

  The operation of the linear actuators 18a to 18c will be described with reference to a structural diagram of the linear actuator 18 shown as a representative example in FIG. The linear actuator 18 transmits the rotary motion of the rotary motor 181 to the rotary nut 182 and rotates it around the threaded portion of the straight screw 183. The rotary nut 182 is screwed with the rectilinear screw 183, and the rotary motion of the rotary nut 182 is a one-dimensional motion of the rectilinear screw 183 in the left-right direction in the figure. When the rotation direction of the rotary motor 181 is switched, the direction of movement of the rectilinear screw 183 can be switched from left to right or from right to left. The rotary nut 182 and the straight screw 183 are provided inside the housing 184, and the rotation stopper 185 prevents the straight screw 183 from rotating in accordance with the rotary motion of the rotary nut 182.

  When the linear actuators 18a to 18c of FIG. 5 operate as described above, the positions in the one-dimensional direction of the wedge-shaped inclined guides 20a to 20c attached to the tips of the linear actuators 18a to 18c can be controlled. At this time, the position in the Y-axis direction (vertical direction in the figure) is controlled for the wedge-shaped tilt guide 20a, and the position in the X-axis direction (horizontal direction in the figure) is controlled for 20b and 20c. Bearings 19a to 19c are provided as shown in the figure in contact with the inclined surface portions of the wedge-shaped inclined guides 20a to 20c. The bearing 19a transmits a change in the position of the wedge-shaped tilt guide 20a in the Y-axis direction to the stage 5 as a change in the position of the X-axis, and the bearings 19b and 19c are the positions of the wedge-shaped tilt guides 20b and 20c in the X-axis direction. The change is transmitted to the stage 5 as a position change in the Y-axis direction.

  As described above, the stage 5 moves in the X-axis direction by driving the linear actuator 18a in the Y-axis direction. Further, the linear actuators 18b and 18c are driven in the X-axis direction, respectively, so that the movement in the Y-axis direction and the rotation around the Z-axis can be performed. In this way, the stage 5 can be arbitrarily moved and rotated in the same manner as described in the first embodiment. The drive amount of the linear actuators 18a to 18c can be controlled by measuring the drive amount of the rotary motor using a rotary encoder or the like. Alternatively, the position of the straight screw may be detected, or the result of detecting the position and rotation state of the stage 5 as described in the first embodiment may be used.

-Third embodiment-
Next, a third embodiment whose schematic diagram of the internal structure is shown in FIG. 7 will be described. In the present embodiment, the stage 5 is directly moved using the linear actuators 18a to 18c described in the second embodiment. Since the other points are the same as those described in the second embodiment, description thereof is omitted. Even in this way, the stage 5 can be arbitrarily moved and rotated.

-Fourth embodiment-
A fourth embodiment whose schematic diagram of the internal structure is shown in FIG. 8 will be described below. Here, link mechanisms 21a to 21c are connected to the linear actuators 18a to 18c described in the second embodiment, respectively. . The link mechanisms 21a to 21c are mechanisms for transmitting the driving of the linear actuators 18a to 18c to the stage 5, and have a structure that can transmit even if the position and rotation state of the stage 5 change. . Since the other points are the same as those described in the second embodiment, description thereof is omitted. Even in this way, the stage 5 can be arbitrarily moved and rotated.

  In each of the above embodiments, the digital still camera has been described as an example. However, the present invention is also applicable to a video camera or the like that captures a subject image using an image sensor.

  In each of the above-described embodiments, the detection means has been described as the sensors 6a to 6c, the moving rotation means as the voice coil motors 7a to 7c, and the biasing member as the tension spring 10, respectively, but the present invention is limited to the above-described embodiments. However, other embodiments that are conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

It is a figure which shows the structure of the camera with the camera-shake correction function by the 1st Embodiment of this invention, (a) is a schematic diagram of an internal structure when it sees from the front, (b) is an inside when it sees from the side A schematic diagram of the structure is shown respectively. It is a structure schematic diagram of a voice coil motor, (a) shows a sectional side view, (b) shows an internal coil in a perspective view. It is a figure which shows a mode that the stage was rotated only the angle (theta) z around the Z-axis, without changing the position in XY plane from the original position. It is a control block diagram in a camera shake correction function. It is a figure which shows the structure of 2nd Embodiment. It is a figure which shows the structure of a linear actuator. It is a figure which shows the structure of 3rd Embodiment. It is a figure which shows the structure of 4th Embodiment.

Explanation of symbols

1: Lens optical axis 2: Lens 3: Camera body 4: Image sensor 5: Stages 6a, 6b, 6c: Angular velocity sensors 7a, 7b, 7c: Voice coil motors 8a, 8b, 8c: Position sensors 9a, 9b, 9c: Ball 10: Tension spring

Claims (6)

  1. A stage capable of moving in a plane perpendicular to the optical axis of the incident light flux and rotating about an axis intersecting the plane;
    Is fixed to the stage, and an image pickup element that captures the subject image by the incident light beam,
    Detecting means for detecting a blur amount generated in the subject image;
    Moving and rotating means for moving and / or rotating the stage and the image sensor so as to correct the amount of shake detected by the detecting means ;
    A ball member provided between the surface of the stage opposite to the surface to which the imaging device is fixed and the surface of the camera body;
    An urging member that is provided on the surface side of the camera body with respect to the stage, and that urges the stage toward the surface side of the camera body, thereby holding the stage along the plane. Camera with image stabilization function.
  2. The camera with a camera shake correction function according to claim 1.
    Before SL IMAGING element, image stabilization function camera thus being moved and / or rotated along a plane perpendicular to the optical axis of the incident light beam.
  3. In any of the camera shake correction function camera as claimed in claim 1-2,
    The moving and rotating means moves the stage and the image sensor by driving the stage in a first direction and second and third directions that are orthogonal to the first direction and parallel to each other. A camera with an image stabilization function characterized by being rotated.
  4. In the camera with a camera shake correction function according to claim 3 ,
    The moving and rotating means has first, second and third driving parts for driving the stage in the first, second and third directions, respectively. Each of the drive parts drives the stage in the same plane, and has a camera shake correction function.
  5. In the camera with a camera shake correction function according to any one of claims 1 to 4 ,
    The camera with a camera shake correction function, wherein the moving and rotating means includes a voice coil motor, and the stage and the image sensor are moved and / or rotated by the voice coil motor.
  6. In the camera with a camera shake correction function according to any one of claims 1 to 5 ,
    It further comprises position detection means for detecting the position and rotation state of the stage,
    The camera with camera shake correction function, wherein the moving and rotating means moves and / or rotates the stage and the image sensor based on the position and / or rotation state of the stage detected by the position detecting means.
JP2003418422A 2003-12-16 2003-12-16 Camera with image stabilization function Active JP4385756B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003418422A JP4385756B2 (en) 2003-12-16 2003-12-16 Camera with image stabilization function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003418422A JP4385756B2 (en) 2003-12-16 2003-12-16 Camera with image stabilization function

Publications (2)

Publication Number Publication Date
JP2005184122A JP2005184122A (en) 2005-07-07
JP4385756B2 true JP4385756B2 (en) 2009-12-16

Family

ID=34780641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003418422A Active JP4385756B2 (en) 2003-12-16 2003-12-16 Camera with image stabilization function

Country Status (1)

Country Link
JP (1) JP4385756B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9288394B2 (en) 2012-02-01 2016-03-15 Ricoh Imaging Company, Ltd. Stage apparatus and camera shake correction apparatus

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4540354B2 (en) * 2004-01-30 2010-09-08 Hoya株式会社 Image blur correction device
JP4647273B2 (en) * 2004-09-24 2011-03-09 Hoya株式会社 Stage drive mechanism
JP4133990B2 (en) 2004-10-01 2008-08-13 株式会社タムロン Actuator and lens unit and camera provided with the same
JP4495564B2 (en) * 2004-10-04 2010-07-07 Hoya株式会社 Stage device and camera shake correction device using the stage device
CN100568076C (en) * 2005-06-15 2009-12-09 Hoya株式会社 Stage apparatus and image movement correction apparatus for camera using stage apparatus
JP2007025616A (en) * 2005-06-15 2007-02-01 Pentax Corp Stage apparatus, and image movement correction apparatus for camera using the stage apparatus
JP4963814B2 (en) * 2005-09-06 2012-06-27 ペンタックスリコーイメージング株式会社 Stage device and camera shake correction device using stage device
JP4783611B2 (en) * 2005-10-06 2011-09-28 Hoya株式会社 Stage device lock mechanism
JP4738125B2 (en) * 2005-10-06 2011-08-03 Hoya株式会社 Stage device lock mechanism
JP5309417B2 (en) * 2005-10-06 2013-10-09 ペンタックスリコーイメージング株式会社 Stage device lock mechanism
JP4740726B2 (en) * 2005-12-05 2011-08-03 株式会社タムロン Translation device and actuator, lens unit and camera equipped with the translation device
JP4564930B2 (en) * 2006-02-28 2010-10-20 三星電子株式会社Samsung Electronics Co.,Ltd. Image stabilizer
KR20080108964A (en) 2006-04-11 2008-12-16 파나소닉 주식회사 Image pickup device
US7952613B2 (en) 2006-09-29 2011-05-31 Fujinon Corporation Image blur correcting unit, image blur correcting device, image pickup apparatus and portable equipment
TWI322924B (en) 2007-04-18 2010-04-01 Coretronic Corp Image stabilization apparatus for stabilizing an image sensor
JP5106998B2 (en) * 2007-11-16 2012-12-26 パナソニック株式会社 Optical element driving apparatus and imaging apparatus
JP2010026277A (en) 2008-07-22 2010-02-04 Hoya Corp Camera shake correcting device
JP5287226B2 (en) * 2008-12-25 2013-09-11 ペンタックスリコーイメージング株式会社 Imaging device
US8633991B2 (en) 2009-12-15 2014-01-21 Hong Kong Applied Science And Technology Research Institute Co. Ltd. Image stabilization of compact imaging device
JP5722265B2 (en) * 2012-03-28 2015-05-20 オリンパス株式会社 Movable member control device and imaging device including the same
JP5427264B2 (en) 2012-03-28 2014-02-26 オリンパス株式会社 Movable member control device and imaging device including the same
KR101915193B1 (en) * 2012-04-24 2018-11-05 한화테크윈 주식회사 Method and system for compensating image blur by moving image sensor
JP6099405B2 (en) * 2013-01-15 2017-03-22 オリンパス株式会社 Blur correction device and imaging device including the same
JP6511750B2 (en) 2014-09-09 2019-05-15 リコーイメージング株式会社 Stage device and image vibration correction device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9288394B2 (en) 2012-02-01 2016-03-15 Ricoh Imaging Company, Ltd. Stage apparatus and camera shake correction apparatus

Also Published As

Publication number Publication date
JP2005184122A (en) 2005-07-07

Similar Documents

Publication Publication Date Title
CN100510844C (en) Optical image stabilizer for camera lens assembly
US7742075B2 (en) Lens driving device, image stabilizing unit, and image pickup apparatus
EP1845710B1 (en) Image stabilizer
WO2010010712A1 (en) Camera driver
JP4647273B2 (en) Stage drive mechanism
KR100712085B1 (en) Optical apparatus
US7639933B2 (en) Stage apparatus and image movement correction apparatus for camera using stage apparatus
US20080145041A1 (en) Anti-shake apparatus
US6091900A (en) Lens barrel and image pickup apparatus
EP1950608B1 (en) Image shake correction device and camera
US20070236577A1 (en) Systems and methods for providing image stabilization
CN101681081B (en) Imaging blur correcting device and an imaging apparatus
US8446478B2 (en) Vibration correcting device, lens barrel, and optical device
JP4606105B2 (en) Image blur correction device
JP2007079300A (en) Camera shake correcting device
CN100501503C (en) Image stabilizer, lens apparatus and imager apparatus
US6112028A (en) Image-shake correcting device
DE19942900B4 (en) Device for correcting image errors caused by camera shake
JP5376780B2 (en) Piezoelectric motor and camera device
JP4843015B2 (en) Imaging device
US8730595B2 (en) Optical image stabilizer and lens driving apparatus
JPH07225405A (en) Image blurring correcting camera
JP5391074B2 (en) Camera, camera system and camera body
KR101031857B1 (en) Hand shaking correction device of a camera
US20170371232A1 (en) Anti-shake compensation structure for auto-focus

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061204

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090526

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20090727

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090727

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090908

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090921

R150 Certificate of patent or registration of utility model

Ref document number: 4385756

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121009

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121009

Year of fee payment: 3

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151009

Year of fee payment: 6

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250