JP2010178075A - Optical device and photographing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical device and a photographing apparatus capable of suitably removing dust. <P>SOLUTION: The optical device includes: a light transmission member 30 for transmitting light; a support part 2 for movably supporting the light transmission member 30; drive parts 3, 3b and 3c provided between the support part 2 and the light transmission member 30, for driving the light transmission member 30 so as to move the light transmission member 30 relatively to the support part 2; and a control part 50 for controlling the drive parts 3, 3b and 3c such that the first time of moving the light transmission member 30 so as to prolong an interval L between the support part 2 and the light transmission member 30 and the second time of moving the light transmission member 30 so as to shorten the interval L between the support part 2 and the light transmission member 30 are different. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical device and an imaging device.

  In an optical apparatus such as a digital single-lens reflex camera, dust may enter the camera body when the lens barrel is replaced. In addition, dust may be generated from a drive unit such as a shutter inside the camera, and such dust may adhere to the light-transmitting member on the front surface of the image sensor, and the dust may appear in the photographing result.

  In response to the demand for downsizing of camera parts, it is conceivable to install a piezoelectric element on the side surface of the dust filter. Compared with the case where a piezoelectric element is provided on the surface of the dustproof filter, the size of the dustproof filter can be reduced, and a relatively large area of the imaging element can be secured.

  Therefore, a technology is known in which a piezoelectric element that expands and contracts is provided on the side surface of the dustproof filter, and a dust is adhered to the dustproof filter by applying a voltage to the piezoelectric element to vibrate the dustproof filter (Patent Document). 1).

  However, with the conventional technology, the acceleration is the same when the piezoelectric element is extended and contracted, so the piezoelectric element is not controlled considering that dust falls in the direction of gravity, and the dustproof performance is insufficient. There was a risk of becoming.

JP 2008-26530 A

  The present invention has been made in view of such a situation, and an object thereof is to provide an optical device and an imaging device capable of suitably removing dust.

In order to achieve the above object, an optical device (100) according to the present invention comprises:
A light transmissive member (30) that transmits light;
A support portion (2) for movably supporting the light transmission member (30);
The light transmission member (30) is provided between the support (2) and the light transmission member (30), and moves the light transmission member (30) relative to the support (2). 30) driving unit (3, 3b, 3c),
A first time (A) for moving the light transmitting member (30) such that a distance (L) between the supporting portion (2) and the light transmitting member (30) in the relative movement direction is increased; and the supporting portion. (2) and the light transmitting member (30) so that the distance (L) is shortened so that the driving unit (3, 3b and 3c).

  In general, the dust attached to the light transmission member is acting in the gravity drop direction. By making the first time and the second time for moving the light transmitting member (30) different, it is possible to quickly move the light transmitting member (30) to the side opposite to the gravity falling direction. Thereby, it is possible to control the drive unit in consideration of the dust falling in the direction of gravity, and it is possible to effectively remove the dust attached to the light transmission member (30).

  The light transmitting member (30), the driving units (3, 3b, 3c) and the support unit (2) are provided along a direction intersecting an incident direction of light incident on the light transmitting member (30). May be.

 The control unit (50) includes an acceleration when moving the light transmission member (30) so that a distance (L) between the support unit (2) and the light transmission member (30) is increased, and the support The drive units (3, 3b, 3c) have different accelerations when the light transmission member (30) is moved so that the distance (L) between the unit (2) and the light transmission member (30) is shortened. ) May be controlled.

 The drive unit (3, 3b, 3c) is provided in the gravity drop direction of the light transmission member (30), and the control unit (50) is configured such that the first time (A) is the second time (B). The drive units (3, 3b, 3c) may be controlled to be shorter. When the drive unit is provided in the gravity falling direction of the light transmitting member (30), the light transmitting member (30) is moved in the direction opposite to the gravity falling direction by making the first time shorter than the second time. Sometimes the acceleration can be increased and dust can be effectively dropped in the direction of gravity drop.

 The drive unit (3, 3b, 3c) is configured by stacking a plurality of electrical conversion elements (3a), and the control unit (50) is configured such that the first time (B) is the second time ( You may control the said drive part (3, 3b, 3c) so that it may become longer than A). The driving unit (3, 3b, 3c) is provided in a direction opposite to the gravity falling direction of the light transmission member (30), and the control unit (50) is configured such that the first time (B) is the second time. You may control the said drive part (3, 3b, 3c) so that it may become longer than time (A). In this case, by making the first time longer than the second time, when the light transmitting member (30) is moved in the direction opposite to the gravity falling direction, the acceleration can be increased, and the dust is removed by gravity. It can drop effectively in the drop direction.

  Generally, when the drive unit (3, 3b, 3c) is contracted, a compressive stress acts on the drive unit (3, 3b, 3c). Since the stacked driving units (3, 3b, 3c) have a strong property against compressive stress, they can be operated quickly when the driving units (3, 3b, 3c) contract. Further, when the drive unit (3, 3b, 3c) is extended, it is operated more slowly than when it is contracted. Generally, when the drive unit (3, 3b, 3c) extends, a tensile stress acts on the drive unit (3, 3b, 3c). The stacked driving unit (3, 3b, 3c) has a property that is weak in strength against tensile stress. However, when the driving unit (3, 3b, 3c) is extended, the driving unit (3, 3b, 3c) is operated slowly. It is possible to reduce the tensile stress acting on 3b, 3c) and to prevent the drive parts (3, 3b, 3c) from peeling off.

 The optical device includes a gravity detection unit (90) that detects the direction of gravity of the device, and the control unit (50) is configured to drive the drive units (3, 3b, 3c) may be controlled. When the gravity detection unit (90) detects the direction of gravity of the device, the drive unit (3, 3b, 3c) at a position suitable for dropping dust can be operated.

 The optical device is provided on the opposite side of the light transmitting member (30) from the side on which the driving units (3, 3b, 3c) are provided, and provides an elastic member that gives an elastic force to the light transmitting member (30). (6, 6b, 6c). Moreover, the said drive part (3, 3b, 3c) may be provided with two or more. Further, the optical device may include an imaging unit (4) provided to face the light transmitting member (30) and capturing an image transmitted through the light transmitting member (30).

  In the above description, in order to explain the present invention in an easy-to-understand manner, the description has been made in association with the reference numerals of the drawings showing the embodiments, but the present invention is not limited to this. The configuration of the embodiment described later may be improved as appropriate, or at least a part of the configuration may be replaced with another component. Further, the configuration requirements that are not particularly limited with respect to the arrangement are not limited to the arrangement disclosed in the embodiment, and can be arranged at a position where the function can be achieved.

FIG. 1 is a block diagram of a camera body according to an embodiment of the present invention. 2 is a schematic perspective view of a main part of the imaging unit shown in FIG. FIG. 3 is a front view of the optical low-pass filter shown in FIG. FIG. 4 is a partial side view for explaining how the multilayer piezoelectric element shown in FIG. 3 expands and contracts. FIG. 5A is a diagram illustrating a change in driving voltage with respect to time, and FIG. 5B is a diagram illustrating a displacement amount of the stacked piezoelectric element with respect to time. FIG. 6 is a front view of an optical low-pass filter according to another embodiment of the present invention. 7A is a diagram showing a change in drive voltage with respect to time of the optical low-pass filter shown in FIG. 6, and FIG. 7B is a displacement of the multilayer piezoelectric element with respect to time of the optical low-pass filter shown in FIG. It is a figure which shows quantity. FIG. 8 is a front view showing another usage state of the optical low-pass filter according to the embodiment shown in FIG.

First Embodiment As shown in FIG. 1, a lens barrel 42 is detachably attached to a camera body 40 of a single-lens reflex camera 100 as a photographing apparatus according to the present embodiment. The camera body 40 includes the imaging unit 12. The imaging unit 12 includes the imaging element 4 and an optical low-pass filter (OLPF) 30 disposed in front of the optical axis direction. In front of the optical low-pass filter (OLPF) 30 in the optical axis Z direction, a shutter unit 44, a mirror 46, a diaphragm unit 47, and an optical lens group 48 are arranged. The optical low-pass filter 30 as a light transmitting member that transmits light is provided to remove a so-called moire phenomenon.

  The camera body 40 is provided with a body CPU 50 and can communicate with a lens CPU 58 provided in the lens barrel 42 via a lens contact 54. The lens contact 54 electrically connects the body CPU 50 and the lens CPU 58 by connecting the lens barrel 42 to the camera body 40. A power source 52 is connected to the body CPU 50. The power source 52 is built in the camera body 40.

  A focal length encoder 66, a distance encoder 64, an aperture drive unit (for example, STM) 68, and the like are connected to the lens CPU 58 in the lens barrel 42. The focal length is input from the focal length encoder 66 to the lens CPU 58 and the focal length information is output to the body CPU 50. The distance encoder 64 detects the extension position of a part of the focusing mechanism of the optical lens group 48. The diaphragm drive unit 68 is controlled by the lens CPU 58 so that the diaphragm 47 is narrowed down. Each member of the lens barrel 42 is supplied with a voltage from a power source 52 of the camera body 40 through a part of the lens contact 54.

 The body CPU 50 in the camera body 40 includes a release switch 51, a strobe 53, a display unit 55, a gyro sensor 70, an EEPROM (memory) 60, an anti-vibration switch 62, a dust-proof filter drive circuit 56, an image processing controller 59, and an AF sensor 72. A vibration mode selection circuit 80, a gravity detection sensor 90, and the like are connected. An image sensor 4 is connected to the image processing controller 59 via an interface circuit 57 so that image processing of an image captured by the image sensor 4 can be controlled.

  The display unit 55 has a function of performing various settings by menu display and displaying a captured image, and is configured by a liquid crystal monitor, for example. The gyro sensor 70 detects an angular velocity caused by camera shake or the like, calculates a shake angle by integrating the detection signal, and uses the output signal for vibration isolation (cancelling shake). The gravity detection sensor 90, which is a gravity detection unit, detects whether the camera body 40 is in the normal position or the horizontal position by detecting the tilt of the camera body 40 and the like.

 A signal is input from the body CPU 50 to the dustproof filter driving circuit 56 at ON / OFF of the power supply 52 or at an arbitrary timing, and the dustproof filter is driven at a predetermined frequency in response to an output signal from the dustproof filter driving circuit 56. Perform dust removal operation. A vibration mode selection circuit 80 is connected to the dustproof drive filter drive circuit 56. The vibration mode selection circuit 80 controls the dustproof drive filter drive circuit 56 through the body CPU 50.

  The mirror 46 on the optical path reflects the light beam incident from the direction of the optical axis Z and guides the image to a finder (not shown), and the sub mirror 46a reflects the light beam transmitted through the mirror 46 to reflect the AF sensor ( For example, it is led to a CCD sensor) 72. The mirror 46 and the sub-mirror 46a are driven by a mirror driving unit (not shown) (for example, a DC motor) and retract from the optical path during exposure.

  The release switch 51 is a switch for operating the shutter drive timing. When the release switch 51 is pressed halfway, the AE, AF, anti-vibration drive, and the like are performed. When the release switch 51 is fully pressed, mirror up, shutter drive, and the like are performed. At this time, the shutter unit 44 is driven by a shutter driving unit (not shown) (for example, a DC motor), and the image sensor 4 receives light.

  The captured image signal photoelectrically converted by the image sensor 4 is input to the body CPU 50 via the interface circuit 57 and the image processing controller 59 and stored in the EEPROM 60. The captured image is displayed on the display unit 55.

  The dustproof filter driving circuit 56 is connected to a multilayer piezoelectric element as a driving unit, drives the multilayer piezoelectric element by a predetermined input signal, vibrates the optical low-pass filter 30, and adheres to the surface of the optical low-pass filter 30. The operation which removes the garbage which is done is performed. Details of the dust removal operation will be described later.

  Next, based on FIG. 2 and FIG. 3, the detailed structure of the imaging unit 12 of this embodiment is demonstrated. In the drawings, the X axis, the Y axis, and the Z axis are perpendicular to each other. Among them, the Z axis coincides with the optical axis direction, and the X axis and the Y axis are substantially parallel to the plane of the optical low-pass filter 30. Moreover, the Y axis is a direction parallel to the bottom surface of the camera body 40 when the camera body 40 is placed at the normal position, and the X axis is a direction perpendicular to the bottom surface of the camera body 40. The G axis is the direction of gravity drop.

 As shown in FIGS. 2 and 3, the optical low-pass filter 30 is disposed at the center in the X-axis and Y-axis directions of the support frame 2 that is a support portion. The image sensor 4 is fixed to the support frame 2. The optical low-pass filter 30 is movable relative to the image sensor 4 along the X axis. One end of a spring 6 that is an elastic member is fixed on both sides of the optical low-pass filter 30 in the Y-axis direction. The other end of each spring 6 is fixed to the support frame 2, and each spring 6 presses the optical low-pass filter 30 against the support frame 2 in the Y-axis center direction. In the present embodiment, the bottom surface 2 a of the support frame 2 is parallel to the bottom surface of the camera body 40.

 As shown in FIGS. 2 and 3, the multilayer piezoelectric element 3 is disposed below the optical low-pass filter 30 in the X-axis direction (on the bottom surface 2 a side). When the camera body 40 is placed at the normal position, the X axis coincides with the gravity drop direction (G axis). That is, the angle θ of the X axis with respect to the G axis becomes zero. The upper end of the multilayer piezoelectric element 3 is bonded to the lower end of the optical low-pass filter 30, and the lower end of the multilayer piezoelectric element 3 is bonded to the support frame 2. In the present embodiment, two laminated piezoelectric elements 3 are arranged along the Y-axis direction, but one or three or more may be arranged.

 As shown in FIG. 4, each stacked piezoelectric element 3 is formed by stacking a plurality of piezoelectric elements 3a. In the figure, five piezoelectric elements 3a are stacked, but 1 to 4 or 6 or more are stacked. It may be laminated. As will be described later, the body CPU 50 shown in FIG. 1 performs control so that a predetermined voltage is applied to the multilayer piezoelectric element 3 shown in FIG. 3, so that the X axis direction between the support frame 2 and the optical low-pass filter 30 is controlled. And the optical low-pass filter 30 moves along the X axis.

 Here, the distance L between the support frame 2 and the optical low-pass filter 30 shown in FIG. The dust removal operation by changing the interval between the portions where the piezoelectric element 3 is disposed will be described. First, when the photographer turns on or off the power supply 52 shown in FIG. 1, the body CPU 50 reads information from the gravity detection sensor 90. Based on the information of the gravity detection sensor 90, the body CPU 50 detects whether or not the camera body 40 is in the normal position. Specifically, as shown in FIG. 3, when the angle θ of the X axis with respect to the G axis is −45 degrees to 45 degrees, the body CPU 50 determines that the camera body 40 is in the normal position, and the angle range thereof. If it is out of the range, it is determined that it is not the normal position. Note that, in the angle θ of the X axis with respect to the G axis, clockwise (clockwise as viewed from the subject side) is a positive angle, and counterclockwise is a negative angle.

 When the body CPU 50 shown in FIG. 1 determines the normal position of the camera body 40, a signal is input from the body CPU 50 to the dustproof filter drive circuit 56 and the vibration mode selection circuit 80. Then, under the control of the vibration mode selection circuit 80, a voltage having a predetermined frequency is applied from the dustproof filter driving circuit 56 to the multilayer piezoelectric element 3 shown in FIG. 3, and the multilayer piezoelectric element 3 expands and contracts along the X-axis direction. do. The optical low-pass filter 30 moves in the X-axis direction and vibrates due to the stretching vibration of the multilayer piezoelectric element 3.

  As shown in FIG. 4, the multilayer piezoelectric element 3 removes dust when the camera body 40 is in the normal position by repeatedly deforming between the length L1 at the maximum extension and the length L2 at the maximum contraction. Operation is performed.

  In the present embodiment, as shown in FIG. 4, the first time A required for the multilayer piezoelectric element 3 to expand and change from the length L2 to the length L1, and the contraction change from the length L1 to the length L2 The laminated piezoelectric element 3 is controlled so that the second time B required for the difference is different. That is, as shown in FIG. 5A, in this embodiment, the body CPU 50 shown in FIG. 1 performs control so that a predetermined voltage is applied to the stacked piezoelectric element 3 so that the drive voltage changes with time. . Along with the change of the drive voltage shown in FIG. 5A, as shown in FIG. 5B, the amount of elongation displacement of the multilayer piezoelectric element 3 also changes. That is, the time A (first time) required for the multilayer piezoelectric element 3 to change in elongation is controlled to be shorter than the time B (second time) required for the multilayer piezoelectric element 3 to contract and change. The Therefore, the acceleration of expansion and contraction of the multilayer piezoelectric element 3 is made different between time A and time B.

  In general, dust attached to the optical low-pass filter 30 has a force acting in the gravity drop direction G. In the present embodiment, the optical low-pass filter 30 can be quickly moved to the side opposite to the gravity falling direction G by making the time A and the time B for moving the optical low-pass filter 30 different. Thereby, it is possible to control the multilayer piezoelectric element 3 in consideration that the dust falls in the gravity drop direction G, and the dust attached to the optical low-pass filter 30 can be effectively removed.

  As described above, when the optical low-pass filter 30 is moved in the direction opposite to the gravity drop direction G, the acceleration can be increased, and dust can be effectively dropped in the gravity drop direction G. Further, when the multilayer piezoelectric element 3 is contracted to the length L2 shown in FIG. 4 (time B), the multilayer piezoelectric element 3 is operated more slowly than when it is expanded.

 Further, the gravity of the optical low-pass filter 30 acts on the stacked piezoelectric element 3 in the gravity drop direction G. Therefore, when the multilayer piezoelectric element 3 extends, the tensile stress acting on the multilayer piezoelectric element 3 is reduced, which is advantageous in terms of strength, and the piezoelectric elements 3a shown in FIG. 4 can be prevented from peeling off. When the multilayer piezoelectric element 3 is provided in the gravity drop direction G of the optical low-pass filter 30, the gravity of the optical low-pass filter 30 is reduced between the optical low-pass filter 30 and the multilayer piezoelectric element 3 when the camera body 40 is in the normal position. Acts in the direction of pressure contact with the interface. For this reason, it is possible to omit the spring 6a for pressing the interface. That is, as shown in FIG. 3, the spring 6a (indicated by a dotted line in FIG. 3) for urging the optical low-pass filter 30 in the direction of the multilayer piezoelectric element 3 becomes unnecessary.

Second Embodiment In the camera of the second embodiment, the imaging unit is configured as shown in FIGS. 6 and 8, except that the dust removal operation is performed as shown in FIGS. 7 (A) and 7 (B). These are the same as those of the camera 100 according to the first embodiment shown in FIG. 1 to FIG.

  First, based on FIG. 6, the detailed structure of the imaging unit 12 of this embodiment is demonstrated. As shown in FIG. 6, the optical low-pass filter 30 is disposed at the center of the support frame 2 in the X-axis and Y-axis directions. The image sensor 4 is fixed to the support frame 2. The optical low-pass filter 30 is movable relative to the image sensor 4 along the X axis and the Y axis. A pair of springs 6b is disposed on the bottom surface 2a side of the optical low-pass filter 30 in the X-axis direction, and a pair of stacked piezoelectric elements 3b is disposed on the opposite side to the bottom surface 2a.

 In FIG. 6, a spring 6c is disposed on the left side in the Y-axis direction of the optical low-pass filter 30, and a multilayer piezoelectric element 3c is disposed on the right side in the Y-axis direction. When the camera body 40 is placed at the normal position, the X axis coincides with the gravity drop direction (G axis). That is, the angle θ of the X axis with respect to the G axis becomes zero. As shown in FIG. 8, when the camera body 40 is placed in the vertical position, the X axis rotates in the clockwise direction by θ = 270 degrees with respect to the gravity drop direction (G axis). Alternatively, the X axis rotates counterclockwise by θ = −45 degrees with respect to the gravity drop direction (G axis).

 In the normal position of the camera body shown in FIG. 6, the lower end of the multilayer piezoelectric element 3 b is in contact with the upper end of the optical low-pass filter 30, and the upper end of the multilayer piezoelectric element 3 b is in contact with the support frame 2. The The left end of the multilayer piezoelectric element 3 c is in contact with the right end of the optical low-pass filter 30, and the right end of the multilayer piezoelectric element 3 b is in contact with the support frame 2. The spring 6b acts to press the upper end of the optical low-pass filter 30 against the lower end of the multilayer piezoelectric element 3b. The spring 6c acts to press the right end of the optical low-pass filter 30 against the left end of the multilayer piezoelectric element 3b. The number of the piezoelectric elements 3b and 3c and the springs 6b and 6c is not particularly limited.

  Here, the dust removal operation will be described. In the present embodiment, with respect to the G axis that is the gravity falling direction, a first region in which the angle θ in the clockwise direction of the X axis is −45 degrees to +45 degrees, a second region that is from +45 degrees to +135 degrees, Different control is performed in the third region of +135 degrees to +225 degrees and the fourth region of +225 degrees to +315 degrees (−45 degrees). The control when the angle θ is in the second region to the fourth region will be described later.

  In the present embodiment, in the first region, it can be determined that the camera body 40 is substantially in the normal position. In this case, the following control is performed. That is, when the body CPU 50 shown in FIG. 1 determines that the camera body 40 is in the normal position (the angle θ is the first region), the support frame 2 determines that the state is close to the state shown in FIG. Can do.

  In that case, a signal is output from the body CPU 50 shown in FIG. 1 to the dustproof filter driving circuit 56 and the vibration mode selection circuit 80, and the laminated piezoelectric element 3b shown in FIG. 30 is moved in the X-axis direction to vibrate. In the first region, the piezoelectric element 3c is not driven, but only guides the movement of the optical low-pass filter 30 in the X-axis direction.

  In the present embodiment, as shown in FIGS. 7A and 7B, when the angle θ is in the first region, the time A (second time) required for the stacked piezoelectric element 3b to contract and change is set. Control is performed so as to be shorter than time B (first time) required for the stacked piezoelectric element 3b to expand and change. By performing such control, the optical low-pass filter 30 can be quickly moved to the side opposite to the gravity drop direction G. Thereby, it is possible to control the multilayer piezoelectric element 3 in consideration that the dust falls in the gravity drop direction G, and the dust attached to the optical low-pass filter 30 can be effectively removed. When the multilayer piezoelectric element 3b is contracted to the length L2 shown in FIG. 4 (time A), compressive stress acts on the multilayer piezoelectric element 3b. In general, since the multilayer piezoelectric element 3b has a strong property against compressive stress, it can be operated quickly when the multilayer piezoelectric element 3b contracts to L2. In general, when the multilayer piezoelectric element 3b extends, tensile stress acts on the multilayer piezoelectric element 3b. The multilayer piezoelectric element 3b is weak in strength against tensile stress. In the present embodiment, the multilayer piezoelectric element 3b is operated slowly when the multilayer piezoelectric element 3b extends (time B). It is possible to reduce the tensile stress acting on the multilayer piezoelectric element 3b and prevent the multilayer piezoelectric element 3b from peeling off.

 When the body CPU 50 detects that the angle θ is in the second region by the gravity detection sensor 90 shown in FIG. 1, it is considered that the piezoelectric element 3 c substantially coincides with the gravity drop direction G. Therefore, in this case, the same control as that performed on the piezoelectric element 3 in the first embodiment is performed on the piezoelectric element 3c. In the second region, the piezoelectric element 3b only guides the movement of the optical low-pass filter 30 in the Y-axis direction, and driving is stopped.

 When the body CPU 50 detects that the angle θ is in the third region by the gravity detection sensor 90 shown in FIG. 1, it is considered that the piezoelectric element 3 b substantially coincides with the gravity drop direction G. Therefore, in this case, the same control as that performed on the piezoelectric element 3 in the first embodiment is performed on the piezoelectric element 3b. In the third region, the piezoelectric element 3c only guides the movement of the optical low-pass filter 30 in the X-axis direction, and driving is stopped.

 When the body CPU 50 detects that the angle θ is in the fourth region by the gravity detection sensor 90 shown in FIG. 1, the piezoelectric element 3b is positioned on the side opposite to the gravity drop direction G as shown in FIG. I think that. Therefore, in that case, the same control as that shown in FIG. 7 for the piezoelectric element 3b is performed on the piezoelectric element 3c. In the fourth region, the piezoelectric element 3b only guides the movement of the optical low-pass filter 30 in the Y-axis direction, and driving is stopped.

 As described above, in the present embodiment, the gravity detection sensor 90 detects the gravitational drop direction G of the camera body 40, so that the piezoelectric element in a position suitable for wiping off dust attached to the surface of the optical low-pass filter 30. 3b or 3c can be activated.

  In the first embodiment described above, the example in which the spring 6 is disposed between the both sides of the optical low-pass filter 30 in the Y-axis direction and the support frame 2 has been described. However, the spring 6 is not necessarily a spring. . For example, a guide for moving the optical low-pass filter 30 in the X-axis direction may be used. Particularly in the second embodiment, a guide that allows the optical low-pass filter 30 to move in a direction perpendicular to the expansion / contraction direction of the respective elements 3b and 3c is provided on the contact surface between the piezoelectric elements 3b and 3c and the optical low-pass filter 30. It may be provided. Similarly, a guide may be provided on the contact surface between the springs 6 b and 6 c and the optical low-pass filter 30.

 In the first and second embodiments, the rectangular optical low-pass filter 30 is described, but it may be circular. The imaging device in the present embodiment is not limited to a digital single lens reflex camera, and may be, for example, a still camera, a video camera, a mobile phone with a built-in camera, or the like.

DESCRIPTION OF SYMBOLS 2 ... Support frame 3 ... Laminated piezoelectric element 4 ... Imaging element 6 ... Spring 12 ... Imaging unit 30 ... Optical low pass filter 40 ... Camera body 50 ... Body CPU
56 ... Dust-proof filter drive circuit 80 ... Vibration mode selection circuit 90 ... Gravity detection sensor

Claims (10)

A light transmissive member that transmits light;
A support portion for movably supporting the light transmission member;
A drive unit that is provided between the support unit and the light transmission member and drives the light transmission member so as to move the light transmission member relative to the support unit;
A first time for moving the light transmission member so that a distance in a relative movement direction between the support portion and the light transmission member is increased; and the interval between the support portion and the light transmission member is shortened. An optical apparatus comprising: a control unit that controls the driving unit so that the second time for moving the light transmitting member is different. The optical device according to claim 1,
The optical device, wherein the light transmission member, the drive unit, and the support unit are provided along a direction intersecting an incident direction of light incident on the light transmission member. An optical device according to claim 1 or claim 2, wherein
The drive unit is configured by laminating a plurality of electrical conversion elements,
The said control part controls the said drive part so that the said 1st time may become longer than the said 2nd time, The optical apparatus characterized by the above-mentioned. An optical device according to claim 1 or 2,
The drive unit is provided in the gravity drop direction of the light transmission member,
The said control part controls the said drive part so that the said 1st time may become shorter than the said 2nd time, The optical apparatus characterized by the above-mentioned. An optical device according to any one of claims 1 to 3, wherein
The drive unit is provided in a direction opposite to the gravity falling direction of the light transmitting member,
The said control part controls the said drive part so that the said 1st time may become longer than the said 2nd time, The optical apparatus characterized by the above-mentioned. An optical device according to any one of claims 1 to 5, wherein
It has a gravity detector that detects the direction of gravity of the device,
The said control part controls the said drive part according to the detection result of the said gravity detection part, The optical apparatus characterized by the above-mentioned. An optical device according to any one of claims 1 to 6, wherein
The control unit includes an acceleration when the light transmission member is moved so that a distance between the support unit and the light transmission member is long, and a distance between the support unit and the light transmission member is short. An optical apparatus, wherein the drive unit is controlled such that acceleration when moving the light transmitting member is different. An optical device according to any one of claims 1 to 7,
An optical device comprising: an elastic member provided on a side opposite to the side on which the driving unit is provided when viewed from the light transmitting member, and applying an elastic force to the light transmitting member. An optical device according to any one of claims 1 to 8,
An optical apparatus comprising a plurality of the drive units. An optical device according to any one of claims 1 to 9,
An imaging apparatus comprising: an imaging unit provided to face the light transmitting member and capturing an image transmitted through the light transmitting member.

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