JP4823837B2 - Imaging device - Google Patents

Description

  The present invention relates to an image pickup apparatus used during shooting.

2. Description of the Related Art Conventionally, an imaging device that can perform zooming or focusing in a camera, a video camera, a camera mounted on a mobile phone, or the like is known (for example, Patent Document 1). This imaging apparatus is an imaging apparatus that detects and controls the position of the imaging optical system in the optical axis direction using an optical sensor.
JP 2005-242256 A JP 2005-309209 A JP 2005-331399 A

  However, in such an imaging device, since the shape of the optical sensor is a slit, the optical sensor is disposed on a relatively stationary member except for the optical axis direction in consideration of the operation control of the member passing through the slit. Is done. For this reason, in an imaging apparatus having a zoom function in a camera shake correction mechanism, an optical sensor is disposed on a moving member that performs camera shake correction. Therefore, there is a possibility that the control cable of the optical sensor hinders the movement of the moving member that performs camera shake correction, and causes a load on the camera shake correction drive source. Further, when the position detection of the image pickup optical system and the image pickup device in the optical axis direction is not accurate, there is a possibility that the control for moving in the optical axis direction is not accurate. For this reason, it is desirable to accurately detect the position of the optical sensor in consideration of preventing malfunction of the imaging device.

  Accordingly, the present invention has been made to solve such a technical problem, and in an imaging apparatus having a zoom function in a camera shake correction mechanism, imaging is performed without adding an extra load to a camera shake correction drive source. An object of the present invention is to provide an imaging apparatus that can accurately grasp the position of the optical system in the optical axis direction.

  That is, the imaging apparatus according to the present invention performs zooming or focusing by relatively moving the imaging optical system and the imaging element in the optical axis direction, and relatively moving the imaging optical system and the imaging element in a direction orthogonal to the optical axis direction. A first actuator that moves the imaging optical system and the imaging element relative to each other in a first direction orthogonal to the optical axis direction, and an orthogonal to the optical axis direction and intersects the first direction. A second actuator for relatively moving the imaging optical system and the imaging element in a second direction, and moving in the first direction together with the imaging optical system by the operation of the first actuator, and the imaging optical by the operation of the second actuator; A moving member that moves in the second direction together with the system, a third actuator that moves the imaging optical system relative to the moving member in the optical axis direction, and the imaging A first sensor for detecting a position in a direction perpendicular to the optical axis direction of the academic system, and a second sensor for detecting a position in the optical axis direction of the imaging optical system that is attached so as not to move with respect to the imaging element. It is configured as a feature.

  According to this invention, it is not necessary to connect the flexible wiring board connected to the second sensor to the moving member by arranging the second sensor on the frame member fixed to the imaging device. For this reason, since the flexible wiring board connected to the second sensor does not hinder the movement of the moving member, the position of the imaging optical system in the optical axis direction can be detected without applying a load to the camera shake correction drive source.

  In the imaging device according to the present invention, it is preferable that the second sensor is a photo interrupter.

  Furthermore, the imaging apparatus according to the present invention corrects the position in the optical axis direction detected from the second sensor based on the position in the direction orthogonal to the optical axis direction of the imaging optical system obtained from the first sensor. It is characterized by comprising correction means for performing the above.

  According to this invention, the imaging optical system is corrected by correcting the position in the optical axis direction detected from the second sensor based on the position in the direction orthogonal to the optical axis direction of the imaging optical system obtained from the first sensor. It is possible to correct the output error of the second sensor that occurs according to the position in the direction orthogonal to the optical axis direction. For this reason, it is possible to accurately detect the position of the imaging optical system in the optical axis direction.

  Furthermore, in the imaging apparatus according to the present invention, the correction means may obtain the position detection characteristic of the second sensor based on the position in the direction orthogonal to the optical axis direction of the imaging optical system obtained from the first sensor. It is characterized by selecting.

  According to this invention, the second sensor selects the detection position characteristic based on the position information of the imaging optical system obtained from the first sensor, and corrects the detected position in the optical axis direction of the imaging optical system. Even when the optical system moves in a direction other than the optical axis direction, it is possible to appropriately detect the position in the optical axis direction.

  Furthermore, in the imaging apparatus according to the present invention, it is preferable that the first actuator and the second actuator are arranged in a T shape.

  Furthermore, in the imaging apparatus according to the present invention, it is preferable that the first actuator, the second actuator, and the third actuator reciprocate a shaft member by an operation of a piezoelectric element.

  According to the present invention, in an image pickup apparatus having a zoom function in a camera shake correction mechanism, the position of the image pickup optical system in the optical axis direction can be accurately grasped without applying an extra load to a camera shake correction drive source.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is an exploded perspective view of an imaging unit, a camera shake correction mechanism, and a zoom mechanism in an imaging apparatus according to an embodiment of the present invention. FIG. 2 is a plan view of the imaging unit, the camera shake correction mechanism, and the zoom mechanism of the imaging apparatus according to the present embodiment. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

  The image pickup apparatus according to the present embodiment performs camera shake correction by relatively moving the image pickup optical system and the image pickup element in a direction orthogonal to the optical axis direction. That is, the camera shake is corrected by moving the imaging optical system in accordance with the camera shake and changing the relative position with the image sensor. A function for performing zooming or focusing is provided. This imaging apparatus is applied to a camera, a video camera, an imaging unit mounted on a mobile phone, and the like.

  First, the configuration of the imaging device will be described. As illustrated in FIG. 1, the imaging apparatus according to the present embodiment includes an imaging optical system 2 and an imaging element 14 for acquiring an image of a subject. The imaging optical system 2 is an optical system that focuses light on the imaging device 14 and includes a photographic lens. The imaging optical system 2 is configured by accommodating a lens (not shown) in a holder 2a, for example. The imaging optical system 2 may be composed of a single lens or a lens group composed of a plurality of lenses.

  The imaging optical system 2 is attached to the moving member 5 and is provided so as to be relatively movable with respect to the imaging element 14 in a direction orthogonal to the direction of the optical axis O (optical axis direction). The moving member 5 is accommodated in the image sensor holder 13 that fixes the image sensor 14 and is supported by the sphere 4 so that the movable member 5 can move relative to the image sensor holder 13 and the image sensor 14 in a direction perpendicular to the optical axis direction. It has become. For this reason, the imaging optical system 2 moves relative to the imaging element 14 in a direction orthogonal to the optical axis direction when the imaging optical system 2 moves together with the moving member 5.

  At that time, it is preferable that the imaging optical system 2 is attached to the moving member 5 so as to be movable in the optical axis direction. For example, the third support shaft 3 facing the optical axis direction is attached to the moving member 5, and the imaging optical system 2 is attached so as to be movable along the third support shaft 3. As the actuator 10 that moves the imaging optical system 2 in the optical axis direction, an actuator that includes a drive shaft 10b that reciprocates by expansion and contraction of the piezoelectric element 10a is used. The actuator 10 functions as a third actuator that moves the imaging optical system 2 in the optical axis direction. The piezoelectric element 10a is attached to the moving member 5, and the drive shaft 10b is frictionally engaged with the imaging optical system 2 by the friction engagement portion 22 (see FIG. 4). One end of the drive shaft 10b is in contact with the piezoelectric element 10a and is bonded using, for example, an adhesive. The drive shaft 10b is a long member, for example, a cylindrical member.

  As the friction engagement structure, for example, a structure in which the drive shaft 10b is pressed against the holder 2a of the imaging optical system 2 with a constant pressing force by a plate spring, and a constant friction force is generated when the drive shaft 10b moves. And By moving the drive shaft 10b so as to exceed this frictional force, the position of the imaging optical system 2 is maintained by inertia. On the other hand, when the drive shaft 10b moves in the reverse direction so as not to exceed the frictional force, the imaging optical system 2 also moves in the reverse direction. By repeating such reciprocating movement of the drive shaft 10b, the imaging optical system 2 can be moved relative to the moving member 5. An electric signal for making the extension speed and the contraction speed different from each other is input to the piezoelectric element 10a from a control unit (not shown). Thereby, the drive shaft 10b reciprocates at different speeds, and the movement control of the imaging optical system 2 can be performed.

  As described above, by attaching the imaging optical system 2 to the moving member 5 so as to be movable in the optical axis direction, only the imaging optical system 2 is moved in the optical axis direction with respect to the moving member 5 to perform zooming or focusing. it can. For this reason, it is not necessary to perform zooming or focusing by moving the entire camera shake correction mechanism. Accordingly, the parts that move due to zooming or focusing are reduced, and the gap provided in the imaging apparatus can be reduced, so that the entire imaging apparatus can be reduced.

  The image pickup device 14 is an image pickup unit that converts an image formed by the photographing optical system 2 into an electric signal, and is fixedly attached to the image pickup device holder 13. For example, a CCD sensor is used as the image sensor 14.

  The imaging apparatus according to the present embodiment includes a first actuator 8 and a second actuator 6. The first actuator 8 is an actuator that relatively moves the imaging optical system 2 and the imaging element 14 in a first direction (pitch direction) X orthogonal to the optical axis direction. As the first actuator 8, for example, an actuator having a drive shaft 8b that reciprocates by expansion and contraction of the piezoelectric element 8a is used. The drive shaft 8b is disposed toward the first direction X. The piezoelectric element 8a is attached to the image sensor holder 13 to which the image sensor 14 is fixed. The drive shaft 8b is frictionally engaged with the slide member 11 by the friction engagement portion 21 (see FIG. 4). One end of the drive shaft 8b is in contact with the piezoelectric element 8a and is bonded using, for example, an adhesive. The drive shaft 8b is a long member, for example, a cylindrical member.

  As the friction engagement structure, for example, the drive shaft 8b is pressed against the slide member 11 with a constant pressing force by a leaf spring, and a constant friction force is generated when the drive shaft 8b moves. When the drive shaft 8b moves so as to exceed this frictional force, the position of the slide member 11 is maintained by inertia. On the other hand, when the drive shaft 8b moves in the reverse direction so as not to exceed the frictional force, the slide member 11 also moves in the reverse direction. By repeating such reciprocating movement of the drive shaft 8b, the slide member 11 can be moved along the first direction X with respect to the image pickup device 14, and the image pickup optical system 2 is moved relative to the image pickup device 14 in the first order. It can be moved in one direction X. The piezoelectric element 8a receives an electrical signal from the control unit (not shown) that makes its expansion speed and contraction speed different. Thereby, the drive shaft 8b can reciprocate at different speeds, and the movement control of the imaging optical system 2 can be performed.

  The first actuator 8 may be configured by attaching the piezoelectric element 8 a to the slide member 11 and frictionally engaging the drive shaft 8 b with the image sensor holder 13.

  The second actuator 6 is an actuator that relatively moves the imaging optical system 2 and the imaging element 14 in a second direction (yaw direction) Y orthogonal to the optical axis direction. The second direction Y is a direction orthogonal to the optical axis direction and intersecting the first direction X. For example, the second direction Y is set to a direction orthogonal to the first direction X. As this second actuator 6, for example, an actuator provided with a drive shaft 6b that reciprocates by expansion and contraction of the piezoelectric element 6a is used. The drive shaft 6b is disposed toward the second direction Y. The piezoelectric element 6 a is attached to the moving member 5. The drive shaft 6b is frictionally engaged with the slide member 11 by the friction engagement portion 20 (see FIG. 2). One end of the drive shaft 6b is in contact with the piezoelectric element 6a and is bonded using, for example, an adhesive. The drive shaft 6b is a long member, and for example, a cylindrical member is used.

  As the friction engagement structure, for example, the drive shaft 6b is pressed against the slide member 11 with a constant pressing force by a plate spring, and a constant friction force is generated when the drive shaft 6b moves. When the drive shaft 6b moves in one direction so as to exceed this frictional force, the position of the moving member 5 is maintained by inertia. On the other hand, when the drive shaft 6b tries to move in the opposite direction so as not to exceed the frictional force, the moving member 5 moves in one direction while the drive shaft 6b remains stationary by the frictional force. By repeating such a reciprocating movement of the drive shaft 6b, the moving member 5 can be moved along the second direction Y with respect to the image pickup device 14, and the image pickup optical system 2 is relatively moved with respect to the image pickup device 14. It can be moved in two directions Y. The piezoelectric element 6a receives an electrical signal from the control unit (not shown) that makes the extension speed and the contraction speed different. Thereby, the drive shaft 6b reciprocates at different speeds, and the movement control of the imaging optical system 2 can be performed.

  The second actuator 6 is attached to the slide member 11 by the friction engagement described above. For this reason, when the slide member 11 moves in the first direction X by the operation of the first actuator 8, the second actuator 6 also moves in the first direction X.

  The second actuator 6 may be configured by attaching the piezoelectric element 6 a to the slide member 11 and frictionally engaging the drive shaft 6 b with the moving member 5.

  The imaging device is provided with a position detection magnet 9 and a first sensor 15. The position detection magnet 9 is a magnet attached to the moving member 5, and may be any one that generates a magnetic field that can be detected by the first sensor 15. The first sensor 15 is a magnetic sensor that detects the relative position of the imaging element 14 and the imaging optical system 2 with respect to the direction orthogonal to the optical axis direction based on the state of the magnetic field generated from the position detection magnet 9. It is an element. The first sensor 15 is attached to the substrate 17, for example. The board | substrate 17 is a wiring board attached to the image pick-up element holder 13, and is bent and used for L shape, for example. The lead wires of the piezoelectric elements 6a, 8a and 10a are attached to the substrate 17 respectively.

  A second sensor 16 is provided in the imaging device. The second sensor 16 is a position detection sensor that detects the position of the imaging optical system 2 and is, for example, a photo interrupter. The second sensor 16 is attached so as not to move with respect to the image sensor 14. For example, the second sensor 16 is attached to the image sensor holder 13 to which the image sensor 14 is attached via the substrate 17. By attaching the second sensor 16 to the imaging element 14 side without attaching to the moving member 5, it is not necessary to extend and attach the substrate 17 to the moving member 5 in order to connect the second sensor 16. The position of the imaging optical system 2 can be detected without applying an extra load to the first actuator 8 and the second actuator 6 to be operated.

  The second sensor 16 includes a light emitting unit and a light receiving unit, and detects the position of the imaging optical system 2 in the optical axis direction through position detection of the moving piece 2b passing between the light emitting unit and the light receiving unit. The moving piece 2 b is a member that is formed in the holder 2 a of the imaging optical system 2 and moves together with the imaging optical system 2.

  The second sensor 16 to be used is such that when the moving piece 2b of the imaging optical system 2 is between the light receiving unit and the light emitting unit, the moving piece 2b of the imaging optical system 2 is terminated in the first direction X and the second direction Y. Even when the moving piece 2b moves, the moving piece 2b is selected such that it does not contact the light receiving part and the light emitting part.

  Further, the control unit (not shown) corrects the position in the optical axis direction detected from the second sensor 16 based on the position in the direction orthogonal to the optical axis direction of the imaging optical system 2 obtained from the first sensor 15. Correction means is provided. The position correction unit will be described later.

  The imaging apparatus includes an upper cover 1. The upper cover 1 is a cover that covers the opening of the image sensor holder 13 that houses the image pickup unit and the camera shake correction mechanism, and forms an opening 1a for entering a subject image.

  As shown in FIG. 2, the slide member 11 is supported by the first support shaft 12 so as to be movable along the first direction X. The first support shaft 12 is a shaft member disposed in the first direction X, and is attached to the image sensor holder 13. The first support shaft 12 is provided through the bearing portion 11 a of the slide member 11. Accordingly, the slide member 11 is supported by the first support shaft 12 so as to move only in the first direction X with respect to the imaging device 14.

  The first support shaft 12 is disposed on the first actuator 8 side with respect to the imaging optical system 2. That is, the first support shaft 12 is not disposed on the opposite side of the first actuator 8 with the imaging optical system 2 interposed therebetween, but is disposed on the first actuator 8 side. For this reason, the movement mechanism by the first actuator 8 and the support mechanism by the first support shaft 12 can be integrated into a compact configuration.

  The moving member 5 is supported by the second support shaft 7 so as to be movable along the second direction Y. The second support shaft 7 is a shaft member arranged in the second direction Y, and is attached to the moving member 5. The second support shaft 7 is provided so as to penetrate the bearing portion 11 b of the slide member 11. Thus, the moving member 5 is supported by the second support shaft 7 so as to move only in the second direction Y with respect to the slide member 11.

  The second support shaft 7 is disposed on the second actuator 6 side with respect to the imaging optical system 2. That is, the second support shaft 7 is not disposed on the opposite side of the second actuator 6 across the imaging optical system 2 but is disposed on the second actuator 6 side. For this reason, the movement mechanism by the 2nd actuator 6 and the support mechanism by the 2nd support shaft 7 can be put together, and can be comprised compactly.

  The first actuator 8 and the second actuator 6 are arranged in a T shape. That is, the first actuator 8 and the second actuator 6 are installed so as to be combined in a T shape with the other tip portion facing one intermediate portion. For example, the first actuator 8 is combined in a T shape with the tip portion of the second actuator 6 facing the intermediate portion.

  Thereby, the drive shafts 8b and 6b of the first actuator 8 and the second actuator 6 can be arranged close to each other. For this reason, the slide member 11 which engages with both the drive shaft 8b and the drive shaft 6b can be made small. Accordingly, it is possible to reduce the size of the imaging device.

  Here, the T-shape includes not only the case where the first actuator 8 and the second actuator 6 are combined in a perfect T shape but also the case where they are combined in a substantially T shape. For example, when the other tip portion is directed to one intermediate portion of the first actuator 8 and the second actuator 6, there is a predetermined space between the intermediate portion and the tip portion, or from the center of the intermediate portion. It may be the case where the tip portion is directed to a position that is out of place. Even in these cases, the slide member 11 that engages with both the drive shaft 8b and the drive shaft 6b can be configured to be small, and the imaging apparatus can be downsized.

  Next, the basic operation of the imaging apparatus according to this embodiment will be described.

  In FIG. 1, when camera shake occurs when shooting using an imaging device, a camera shake detection sensor (not shown) such as a gyro sensor detects camera shake, and an image captured by the image sensor 14 is blurred. A drive signal is output from the control unit (not shown) to the first actuator 8 and the second actuator 6 so as not to be present.

  The first actuator 8 and the second actuator 6 are input with drive signals such that the expansion speed and contraction speed of the piezoelectric elements 8a, 6a are different. As a result, the drive shafts 8b and 6b repeatedly reciprocate. The slide member 11 moves in the first direction X with respect to the imaging element 14 by driving the first actuator 8, and the imaging optical system 2 together with the moving member 5 moves in the second direction Y with respect to the slide member 11 by driving the second actuator 6. The imaging element 14 and the imaging optical system 2 move relatively.

  Thereby, even if camera shake occurs in the imaging apparatus, the imaging device 14 and the imaging optical system 2 are relatively moved and controlled, and the camera shake of the captured image of the imaging device 14 is suppressed.

  When performing zooming or focusing, a drive signal is output from the control unit (not shown) to the third actuator 10 so as to enlarge or focus the image picked up by the image sensor 14.

  The third actuator 10 is input with a drive signal such that the expansion speed and contraction speed of the piezoelectric element 10a are different. Thereby, the drive shaft 10b repeatedly moves back and forth. By driving the third actuator 10, the imaging optical system 2 moves in the optical axis direction with respect to the moving member 5, and the imaging element 14 and the imaging optical system 2 move relative to each other.

  Thereby, the imaging device 14 and the imaging optical system 2 are controlled to move relative to each other in the optical axis direction, and zooming or focusing can be performed.

  Next, means for correcting the position detected from the second sensor 16 will be described with reference to FIGS. FIG. 5 is a flowchart illustrating the operation of the imaging apparatus according to the present embodiment. FIG. 6 is an explanatory diagram of a positional relationship when viewed from the optical axis direction of the imaging optical system and the second sensor of the imaging apparatus according to the present embodiment. FIG. 7 shows detection position characteristics of the second sensor depending on the positional relationship shown in FIG.

  The control process in FIG. 5 is repeatedly performed at a predetermined timing when the power is turned on, for example. When the process is started, the process proceeds to the slit detection process (S10). The process of S10 determines whether or not the second sensor 16 has detected the moving piece 2b. If not detected, the process in FIG. 5 is terminated. When it detects, it transfers to the positional information input process from the 1st sensor 15 (S12).

  S12 is a process of reading the positions in the first direction X and the second direction Y of the moving piece 2b obtained by the first sensor 15. Since the imaging optical system 2 and the moving piece 2b move as a unit, the position information obtained from the first sensor 15 becomes the position information of the imaging optical system 2. Since the imaging optical system 2 and the moving piece 2b are movable in the first direction X and the second direction Y, the position of the moving piece 2b detected by the second sensor 16 also changes as shown in FIG. For example, when the imaging optical system 2 is located at the end in the first direction X, the position of the moving piece 2b is the position B or the position C. When the imaging optical system 2 is located at the end in the second direction Y, the position of the moving piece 2b is the position D or the position E. When the process of S12 ends, the process proceeds to a detection position characteristic selection process (S14).

  S <b> 14 is a process of selecting the detection position characteristic of the second sensor 16 based on the position information from the first sensor 15. As shown in FIG. 7, the detection position characteristic of the second sensor 16 in the optical axis direction changes depending on the position of the moving piece 2b. Thus, the detection position characteristic of the second sensor 16 in the optical axis direction is selected according to the position of the moving piece 2b, and the detection position is corrected. For example, when the moving piece 2b is located at the position B in FIG. 6, when the graph B in FIG. 7A is selected and the output voltage of Y2 is detected, the moving piece 2b is located at L in the optical axis direction. to decide. In this way, even when an error occurs between the detection position and the accurate position due to the movement of the moving piece 2b, by selecting an appropriate detection position characteristic based on the position information of the moving piece 2b, the imaging optical system 2 The position in the optical axis direction can be controlled. When the process of S14 ends, the process of FIG. 5 ends.

  As described above, according to the imaging apparatus according to the present embodiment, the second sensor 16 is arranged on the substrate 17 fixed to the imaging apparatus, whereby the flexible wiring board connected to the second sensor 16 is attached to the moving member 5. No need to connect. For this reason, since the flexible wiring board connected to the second sensor 16 does not hinder the movement of the moving member 5, the position of the imaging optical system 2 in the optical axis direction without applying a load to the first actuator 8 and the second actuator 6. Can be detected.

  Further, according to the imaging apparatus according to the present embodiment, the optical axis direction detected from the second sensor 16 based on the position in the direction orthogonal to the optical axis direction of the imaging optical system 2 obtained from the first sensor 15. By correcting the position, it is possible to correct the output error of the second sensor 16 that occurs according to the position of the imaging optical system 2 in the direction orthogonal to the optical axis direction. For this reason, the position of the imaging optical system 2 in the optical axis direction can be accurately detected.

  Furthermore, according to the imaging apparatus according to the present embodiment, the second sensor 16 selects a detection position characteristic based on the positional information of the imaging optical system 2 obtained from the first sensor 15, and detects the detected imaging optical system 2. Since the position in the optical axis direction is corrected, the position in the optical axis direction can be appropriately detected even when the imaging optical system 2 moves in a direction other than the optical axis direction.

  The embodiment described above shows an example of an imaging apparatus according to the present invention. The imaging device according to the present invention is not limited to the imaging device according to these embodiments, and the imaging device according to the embodiment may be modified or otherwise changed without changing the gist described in each claim. It may be applied to.

  For example, in the present embodiment, a description has been given of the camera shake correction mechanism that moves the imaging optical system 2 with respect to the imaging device 14 in accordance with the camera shake, but the imaging device 14 is moved with respect to the imaging optical system 2. May be. Even in this case, the same effect as the imaging device according to the above-described embodiment can be obtained. In this embodiment, an actuator using a piezoelectric element is used as an actuator of the imaging apparatus. However, an actuator using another driving component such as a motor may be used.

2 is an exploded perspective view of an imaging unit, a camera shake correction mechanism, and a zoom mechanism of the imaging apparatus according to the embodiment of the present invention. FIG. FIG. 2 is a plan view of an imaging unit, a camera shake correction mechanism, and a zoom mechanism of the imaging apparatus of FIG. 1. It is sectional drawing in III-III of FIG. It is sectional drawing in IV-IV of FIG. It is a flowchart which shows operation | movement of the imaging device which concerns on this embodiment. It is positional relationship explanatory drawing seen from the optical axis direction of the imaging optical system of the imaging device which concerns on this embodiment, and a 2nd sensor. It is a detection position characteristic of the 2nd sensor depending on the positional relationship of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Upper cover, 2 ... Imaging optical system, 3 ... 3rd support shaft, 4 ... Ball, 5 ... Moving member, 6 ... Second actuator, 7 ... Second support shaft, 8 ... First actuator, 9 ... Position detection Magnets, 10 ... third actuator, 11 ... sliding member, 12 ... first support shaft, 13 ... imaging element holder, 14 ... imaging element, 15 ... first sensor, 16 ... second sensor, 17 ... substrate, 20, 21, 22 ... Friction engaging portions.

Claims (5)

An image pickup apparatus that performs zooming or focusing by relatively moving an image pickup optical system and an image pickup element in the optical axis direction, and performs image stabilization by moving the image pickup optical system and the image pickup element in a direction orthogonal to the optical axis direction. And
A first actuator for relatively moving the imaging optical system and the imaging element in a first direction orthogonal to the optical axis direction;
A second actuator that relatively moves the imaging optical system and the imaging element in a second direction orthogonal to the optical axis direction and intersecting the first direction;
A moving member that moves in the first direction together with the imaging optical system by the operation of the first actuator, and that moves in the second direction together with the imaging optical system by the operation of the second actuator;
A third actuator that moves the imaging optical system relative to the moving member in an optical axis direction;
A first sensor for detecting a position in a direction orthogonal to the optical axis direction of the imaging optical system;
A second sensor that is mounted so as not to move with respect to the image sensor and detects a position in the optical axis direction of the imaging optical system;
Correction means for correcting the position in the optical axis direction detected from the second sensor based on the position in the direction orthogonal to the optical axis direction of the imaging optical system obtained from the first sensor;
An imaging apparatus comprising:   The imaging apparatus according to claim 1, wherein the second sensor is a photo interrupter. The correction means selects a position detection characteristic of the second sensor based on a position in a direction orthogonal to the optical axis direction of the imaging optical system obtained from the first sensor;
The imaging device according to claim 1, wherein: The imaging device according to any one of claims 1 to 3 , wherein the first actuator and the second actuator are arranged in a T shape. Said first actuator, said second actuator and the third actuator, an imaging apparatus according to any one of claim 1 to 4, characterized in that reciprocating the shaft member by the operation of the piezoelectric element .

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