JP6120691B2 - Image shake correction apparatus, optical apparatus, and imaging apparatus - Google Patents

Description

  The present invention relates to an image shake correction apparatus and image shake correction mounted on an optical apparatus including an imaging apparatus such as a digital camera or a digital video camera, an interchangeable lens for single lens reflex, an observation apparatus such as a binocular, a telescope, and a field scope. The present invention relates to an optical apparatus including the apparatus and an imaging apparatus.

  An image shake correction apparatus mounted on a digital camera or the like has a movable lens that holds a correction lens or an image sensor as an image shake correction optical system in two directions (yaw direction and pitch direction) in a plane orthogonal to the optical axis. By moving it, the effect of camera shake that occurs during shooting is reduced.

  As a conventional image blur correction apparatus of this type, a technique for rotating a movable member holding a correction lens in two directions on a spherical surface with a predetermined point on the optical axis of the correction lens as a sphere is proposed. (Patent Document 1).

JP 2008-134329 A

  Incidentally, the lens group constituting the optical apparatus moves in the optical axis direction by zooming, focusing, or the like. Therefore, in order to optimize the optical performance when the correction lens is rotated, the radius of curvature that the correction lens rotates needs to be changed according to the position of the lens group in the optical axis direction.

  However, in Patent Document 1 described above, the position of the sphere center around which the correction lens rotates is fixed. That is, the radius of curvature of the spherical surface on which the correction lens rotates is constant. For this reason, in Patent Document 1, it is difficult to optimize the optical performance when the correction lens is rotated according to the position of the lens group in the optical axis direction.

  Therefore, an object of the present invention is to provide a mechanism for improving optical performance when an image blur correction optical system is rotated in accordance with the position in the optical axis direction of a lens group constituting an optical apparatus.

  In order to achieve the above object, an image shake correction apparatus according to the present invention includes a fixing member having a first region, a second region facing the first region in the optical axis direction, and an image. A movable member that holds a shake correction optical system, and is disposed between the fixed member and the movable member, contacts the second region and the first region, and is movable with respect to the fixed member. A support member that supports the member so as to be movable in a direction crossing the optical axis, and guides the support member in a range of the first region of the fixing member, and the diameters of the support member and the first region. A guide member that changes a contact position in a direction so as to be selectable, and a biasing unit that biases the movable member and the fixed member toward each other, the second region, and the first region At least one of the regions has a plurality of spherical surfaces with different radii of curvature. Characterized in that it is continuously formed.

  According to the present invention, it is possible to improve the optical performance when the image blur correction optical system is rotated according to the position in the optical axis direction of the lens group constituting the optical apparatus.

1 is an exploded perspective view of an image blur correction apparatus that is a first embodiment of the present invention. FIG. It is the disassembled perspective view which looked at the image blurring correction apparatus shown in FIG. 1 from the downward direction. FIG. 2 is a cross-sectional view along the optical axis direction of the assembly of the image blur correction device shown in FIG. 1. It is a figure which shows the relationship between a fixed ground plate, a rolling ball, and a retainer at the time of seeing from the left side of FIG. It is sectional drawing in alignment with the optical axis direction of an image blurring correction apparatus when a retainer is switched from the 1st position to the 2nd position. It is a figure which shows the relationship between a fixed ground plate, a rolling ball, and a retainer at the time of seeing from the left side of FIG. It is a disassembled perspective view of the image blur correction apparatus which is the 2nd Embodiment of this invention. It is sectional drawing in alignment with the optical axis direction of an image shake correction apparatus when a retainer exists in a 1st position. It is a figure which shows the relationship between a fixed ground plate, a sliding pillar, and a retainer at the time of seeing from the left side of FIG. FIG. 10 is a diagram illustrating a relationship among a fixed base plate, a rolling ball, and a retainer when the retainer is in a first position in the image blur correction device that is the third embodiment of the present invention. FIG. 10 is a cross-sectional view of a main part along the optical axis of the image shake correction apparatus when the retainer is in the first position in the image shake correction apparatus according to the fourth embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an exploded perspective view of the image blur correction apparatus according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view of the image blur correction apparatus shown in FIG. 1 as viewed from below. FIG. 3 is a cross-sectional view along the optical axis direction of the assembly of the image blur correction apparatus shown in FIG.

  As shown in FIGS. 1 to 3, the image shake correction apparatus 100 according to the present embodiment includes a correction lens 101, a movable member 102, a fixed ground plate 103, a rolling ball 104, a retainer 105, a biasing spring 106, and a first drive. Part 107, second drive part 108, and lid part 109. The correction lens 101, the movable member 102, the fixed ground plate 103, the retainer 105, and the lid portion 109 are arranged along the optical axis direction.

  The correction lens 101 is held by a holding cylinder 102 a provided at the center of the movable member 102. Here, in the present embodiment, the correction lens 101 is employed as an example of the image blur correction optical system of the present invention, but an imaging element such as a CCD sensor or a CMOS sensor may be used instead of the correction lens 101.

  The movable member 102 is disposed between the retainer 105 and the lid portion 109, and has a holding cylinder 102a that holds the correction lens 101 at the center. An annular plate-like flange portion 1021a is provided on the outer periphery of the end portion of the holding cylinder 102a on the lid portion 109 side. On the surface of the flange portion 1021a facing the retainer 105, a support plane portion 1021 is provided that is a plane that intersects (substantially orthogonally) substantially perpendicular to the optical axis.

  On the outer peripheral portion of the flange portion 1021a, three protruding pieces 1022a protruding radially outward are provided at substantially equal intervals in the circumferential direction, and a support spherical surface portion 1022 is provided on the surface of each protruding piece 1022a facing the retainer 105. It has been. The support spherical portion 1022 is formed in a concave spherical shape having a center on the optical axis. Here, the support flat surface portion 1021 and the support spherical surface portion 1022 correspond to an example of the second region (movable side contact region) of the present invention.

  A spring hooking portion 1023 is provided on the outer peripheral portion of the flange portion 1021a. The spring hooking portions 1023 are respectively provided between the protruding pieces 1022a adjacent to each other in the circumferential direction of the flange portion 1021a. The spring hooking portions 1023 are arranged in a total of three locations, and one end of the biasing spring 106 is hooked.

  The fixed ground plate 103 is disposed so as to face the movable member 102 in the optical axis direction with the retainer 105 interposed therebetween, and is formed in a bottomed cylindrical shape, for example, a lens group (not shown) constituting the imaging optical system. Fixed to the holding lens barrel. Here, the fixed ground plate 103 corresponds to an example of the fixing member of the present invention.

  A retainer support portion 1033 made of a circular recess is formed in the center of the bottom of the fixed base plate 103, and the retainer 105 is rotatably supported by the retainer support portion 1033. In addition, an opening is formed at the bottom of the retainer support 1033 (the bottom of the circular recess), and the holding cylinder 102a of the movable member 102 is inserted into the opening with a gap in the radial direction. The opening restricts the movement of the movable member 102 in the radial direction.

  Further, the fixed ground plate 103 is provided with a support flat surface portion 1031, a support spherical surface portion 1032, a spring hooking portion 1034, and a rotation restricting portion 1035. The support flat surface portion 1031 and the support spherical surface portion 1032 are disposed in a groove portion formed along the radial direction in the bottom portion of the fixed base plate 103, and the rolling ball 104 is accommodated in the groove portion so as to be able to roll.

  The support plane portion 1031 is formed of a plane that is substantially orthogonal to the optical axis, is formed at three locations at substantially equal intervals in the circumferential direction, and is disposed opposite the support plane portion 1021 of the movable member 102 in the optical axis direction. . On the other hand, the support spherical surface portion 1032 is arranged at three substantially equal intervals in the circumferential direction so as to face the support spherical surface portion 1022 of the movable member 102 in the optical axis direction. It is continuously provided in the radial direction with respect to the portion 1031.

  The support spherical portion 1032 is formed in a convex spherical shape having the same center as the support spherical portion 1022 of the movable member 102 on the optical axis. Therefore, the support spherical surface portion 1032 on the fixed ground plate 103 side has a spherical shape concentric with the support spherical surface portion 1022 on the movable member 102 side. Here, the support flat surface portion 1031 and the support spherical surface portion 1032 correspond to an example of the first region (fixed side contact region) of the present invention.

  The radius of the support spherical surface portion 1032 is set smaller than the radius of the support spherical surface portion 1022 by the diameter of the rolling ball 104. Further, the length from the inner diameter side of the support flat surface portion 1031 to the outer diameter side of the support spherical surface portion 1032 is set to be longer than the diameter of the rolling ball 104 plus 1/2 of the movable amount of the movable member 102. Is done.

  The spring hooking portions 1034 are provided at three locations at substantially equal intervals in the circumferential direction of the fixed base plate 103 corresponding to the spring hooking portions 1023 of the movable member 102, and the other end of the biasing spring 106 is hooked. The rotation restricting portion 1035 is formed by cutting out the peripheral wall of the fixed ground plate 103 and restricts the rotation range of the retainer 105. The rolling ball 104 corresponds to an example of a support member of the present invention, and supports the movable member 102 so as to be movable in a radial direction with respect to the fixed base plate 103. Detailed functions of the rolling ball 104 will be described later.

  The retainer 105 corresponds to an example of the guide member of the present invention, has an opening at the center, and rotates to the retainer support portion 1033 between a first position and a second position described later with respect to the fixed base plate 103. Supported as possible. In the retainer 105, three cam groove portions 1051 in which the rolling balls 104 are held so as to roll are formed at substantially equal intervals in the circumferential direction. The cam groove 1051 is formed in a so-called Archimedean spiral, and the distance from the rotation center changes at a constant rate with respect to the rotation of the retainer 105. The length of the cam groove 1051 is set longer than the diameter of the rolling ball 104 plus one half of the movable amount of the movable member 102.

  Further, the outer peripheral portion of the retainer 105 is provided with a protruding portion 1052 protruding outward in the radial direction, and the protruding portion 1052 is inserted into a notch portion of the rotation restricting portion 1035. The position where the protrusion 1052 contacts one end of the rotation restricting portion 1035 due to the rotation of the retainer 105 is defined as the first position of the retainer 105, and the position where the protrusion 1052 contacts the other end is defined as the second position of the retainer 105. Define as position.

  At the first position of the retainer 105, the cam groove portion 1051 intersects the support plane portion 1021 of the movable member 102 and the support plane portion 1031 of the fixed ground plate 103. Further, at the second position of the retainer 105, the cam groove portion 1051 intersects the support spherical surface portion 1022 of the movable member 102 and the support spherical surface portion 1032 of the fixed ground plate 103.

  In this embodiment, the urging spring 106 is constituted by a tension coil spring, and one end is hooked on the spring hooking portion 1023 of the movable member 102 and the other end is hooked on the spring hooking portion 1034 of the fixed base plate 103. As a result, an urging force is generated between the fixed ground plate 103 and the movable member 102 in a direction approaching each other.

  With this urging force, the rolling ball 104 can be held between the fixed ground plate 103 and the movable member 102 and kept in contact. Further, the position of the movable member 102 in the rotational direction becomes a stable point due to the urging force of the three urging springs 106. In this embodiment, an urging force is generated between the fixed ground plate 103 and the movable member 102 using a spring force, but the fixed ground plate 103 and the movable member 102 are utilized using an electrostatic force or a magnetic force. An urging force may be generated during the period.

  The first driving unit 107 includes, for example, a voice coil motor including a first magnet 1071 and a first coil 1072, and generates a driving force that moves the movable member 102 in a direction substantially orthogonal to the optical axis. .

  The first magnet 1071 is provided integrally with the movable member 102, and the surface facing the first coil 1072 is divided into two parts, which are respectively magnetized to N and S poles. The first coil 1072 is disposed to face the magnetized surface of the first magnet 1071 and is held by the lid portion 109. Then, by energizing the first coil 1072, a Lorentz force is generated by the action of the magnetic flux generated by the first magnet 1071. Due to the Lorentz force generated by the first magnet 1071 and the first coil 1072, the movable member 102 can be moved in a direction substantially perpendicular to the optical axis.

  The second drive unit 108 includes a second magnet 1081 and a second coil 1082. The second drive unit 108 is composed of, for example, a voice coil motor, and generates a driving force that moves the movable member 102 in a direction substantially orthogonal to the optical axis and substantially orthogonal to the drive direction of the first drive unit 107. To do.

  The second magnet 1081 is provided integrally with the movable member 102 with a phase difference of 90 ° with respect to the first magnet 1071, and the surface facing the second coil 1082 is divided into two parts. Magnetized on the pole. The second coil 1082 is disposed to face the magnetized surface of the second magnet 1081 and is held by the lid portion 109. Then, when the second coil 1082 is energized, a Lorentz force is generated by the action of the magnetic flux generated by the second magnet 1081, thereby making the movable member 102 substantially perpendicular to the optical axis and the first drive. It can be moved in a direction substantially orthogonal to the drive direction of the portion 107.

  The lid portion 109 is formed in an annular plate shape and is fixed to the fixed ground plate 103. Thereby, the movable member 102, the retainer 105, etc. are accommodated in the space between the cover part 109 and the fixed ground plate 103. FIG.

  FIG. 4 is a diagram showing the relationship among the fixed ground plate 103, the rolling balls 104, and the retainer 105 when viewed from the left side of FIG. FIG. 4 shows a state where the retainer 105 is in the first position.

  As shown in FIG. 4, when the retainer 105 is in the first position, the rolling ball 104 is positioned at the end closest to the inner diameter side of the retainer 105 of the cam groove portion 1051 and the support plane portion 1031 of the fixed base plate 103. Touching. At this time, the rolling ball 104 is guided by the cam groove portion 1051 and is prevented from rolling to the support spherical surface portion 1032 of the fixed ground plate 103. The rolling ball 104 is also in contact with the support flat surface portion 1021 of the movable member 102. The movable member 102 is stably positioned with respect to the fixed ground plate 103 in the optical axis direction by sandwiching the rolling ball 104 with the fixed ground plate 103 by the biasing force of the biasing spring 106.

  In this state, a predetermined current is passed through the first drive unit 107 and the second drive unit 108 to move the movable member 102 to an appropriate position along a plane substantially orthogonal to the optical axis. Can do. As a result, image blur correction is performed in which a subject image formed on the image sensor through a lens group constituting the optical apparatus is corrected against vibration such as camera shake.

  FIG. 5 is a cross-sectional view along the optical axis direction of the image blur correction apparatus when the retainer 105 is switched from the first position to the second position. 6 is a diagram showing the relationship among the fixed ground plate 103, the rolling balls 104, and the retainer 105 when viewed from the left side of FIG.

  As shown in FIG. 6, when the retainer 105 is switched from the first position to the second position, the rolling ball 104 is located at the end closest to the outer diameter side of the retainer 105 of the cam groove 1051 and is fixed to the fixed ground plate. 103 is in contact with the support spherical surface portion 1032. At this time, the rolling ball 104 is guided by the cam groove portion 1051 and is prevented from returning to the support plane portion 1031 of the fixed base plate 103. Further, the rolling ball 104 also comes into contact with the support spherical surface portion 1022 of the movable member 102 and is sandwiched between the movable member 102 and the fixed ground plate 103 by the urging force of the urging spring 106 so as to be able to roll.

  Further, as described above, the radius of curvature of the support spherical portion 1022 of the movable member 102 is equal to the radius of curvature of the rolling ball 104 added to the radius of curvature of the support spherical portion 1032 of the fixed ground plate 103. Accordingly, the movable member 102 is stably positioned in the optical axis direction with respect to the fixed base plate 103 regardless of the position of the rolling ball 104.

  In this state, the movable member 102 is supported so as to be movable in a spherical shape via the rolling ball 104 around the same center of curvature on the optical axis of the support spherical portion 1032 and the support spherical portion 1022. Therefore, when the movable member 102 is moved in the radial direction, the central axis of the correction lens 101 held by the movable member 102 is inclined by a predetermined angle with respect to the optical axis of the lens group constituting the optical apparatus.

  A position where the radial contact position between the supporting spherical surface portion 1022 and the rolling ball 104 becomes appropriate for the movable member 102 by passing a predetermined current through the first driving portion 107 and the second driving portion 108. Can be moved to. As a result, the correction lens 101 is tilted by an appropriate angle with respect to the optical axis of the lens group, and image blur correction is performed to correct a subject image formed on the image sensor through the lens group against vibration such as camera shake. Is called. Note that control for performing image blur correction by controlling energization to the first drive unit 107 and the second drive unit 108 is omitted because it is publicly known.

  Here, in the present invention, each plane of the support plane portion 1021 of the movable member 102 and the support plane portion 1031 of the fixed ground plate 103 is defined as a spherical surface having an infinite curvature radius. Therefore, the support flat surface portion 1021 and the support spherical surface portion 1022 of the movable member 102 correspond to an example of a plurality of spherical surfaces having different curvature radii according to the present invention. Further, the support flat surface portion 1031 and the support spherical surface portion 1032 of the fixed ground plate 103 also correspond to an example of a plurality of spherical surfaces having different curvature radii according to the present invention.

  As described above, in this embodiment, the surface of the movable member 102 that is movably supported via the rolling ball 104 (hereinafter referred to as the movable surface) is switched by switching the rotational position of the retainer 105. It can be changed to a surface with a different radius.

  This makes it possible to change the radius of curvature of the movable surface of the movable member 102 in accordance with the position of the lens group when the position of the lens group constituting the optical device in the optical axis direction changes due to zooming or focusing. Become. As a result, the optical performance when the correction lens 101 is rotated can be improved.

  In the present embodiment, the case where a plurality of surfaces having different curvature radii is formed on both the movable member 102 and the fixed ground plate 103 is illustrated, but a plurality of surfaces having different curvature radii are formed on either the movable member 102 or the fixed ground plate 103. The surface may be formed.

  For example, a support flat surface portion and a support spherical surface portion are formed on the movable member 102, and even if both surfaces of the fixed ground plate facing the respective surfaces are flat, the movable member 102 can be moved by selectively switching the rotation position of the retainer 105. The movable surface of the member 102 can be changed to a surface having a different curvature radius. In this case, since the position of the correction lens 101 in the optical axis direction changes depending on the position of the rolling ball 104, etc., it is necessary to design for this change.

(Second Embodiment)
Next, with reference to FIGS. 7 to 9, an image shake correction apparatus according to the second embodiment of the present invention will be described. FIG. 7 is an exploded perspective view of the image blur correction apparatus according to the present embodiment. FIG. 8 is a cross-sectional view along the optical axis direction of the image blur correction apparatus when the retainer 105 is in the first position. FIG. 9 is a diagram illustrating a relationship among the fixed ground plate 103, the sliding column 204, and the retainer 105 when viewed from the left side of FIG. In addition, about the part which overlaps or corresponds to 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

  As shown in FIGS. 7 to 9, the image blur correction apparatus 200 according to the present embodiment uses a sliding column 204 instead of the rolling ball 104. The sliding column 204 is movably accommodated in the support flat surface portion 1031 and the support spherical surface portion 1032 of the fixed ground plate 103. The sliding portions of the sliding column 204 with respect to the support flat surface portion 1021 and the support spherical surface portion 1022 of the movable member 102 are formed in a spherical shape, and the movable member 102 is slidably supported with respect to the fixed base plate 103. The sliding column 204 is movably fitted to the cam groove 1051 of the retainer 105.

  In this embodiment, since the sliding column 204 is movably fitted to the cam groove portion 1051 of the retainer 105, the groove width of the cam groove portion 1051 can be made narrower than when the rolling ball 104 is used, and the entire apparatus. Can be miniaturized. Other configurations and operational effects are the same as those in the first embodiment.

(Third embodiment)
Next, with reference to FIG. 10, an image blur correction apparatus according to a third embodiment of the present invention will be described. FIG. 10 is a diagram illustrating a relationship among the fixed ground plate 103, the rolling balls 104, and the retainer 105 when the retainer 105 is in the first position. In addition, about the part which overlaps or corresponds to 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

  By the way, when the retainer 105 is positioned between the first position and the second position, the rolling ball 104 is driven by the movable member 102 and the boundary between the support plane portion and the support spherical surface portion of the movable member 102 and the fixed ground plate 103 is reached. The operation of the movable member 102 becomes unstable. Therefore, in the present embodiment, stable operation of the movable member 102 is ensured as follows.

  That is, as shown in FIG. 10, in the image shake correction apparatus 300 of the present embodiment, the protrusion 1052 of the retainer 105 is formed of a ferromagnetic material such as iron. Further, one end of the rotation restricting portion 1035 of the fixed ground plate 103 with which the protruding portion 1052 abuts when the retainer 105 is in the first position is magnetized to the N pole. Further, the other end of the rotation restricting portion 1035 of the fixed ground plate 103 with which the protruding portion 1052 abuts when the retainer 105 is in the second position is magnetized to the S pole.

  As a result, a magnetic attractive force is generated between the protrusion 1052 of the retainer 105 and the rotation restricting portion 1035 of the fixed ground plate 103. This magnetic attraction force acts as an urging force that presses the protrusion 1052 against the abutting portion of the rotation restricting portion 1035, and holds the retainer 105 in the first position or the second position.

  When the retainer 105 is in the first position or the second position due to this magnetic attraction force, the rolling ball 104 moves to the boundary between the support flat surface portion 1021 and the support spherical surface portion 1022 of the movable member 102 or the support flat surface portion of the fixed ground plate 103. It is difficult to get over the boundary between 1031 and the support spherical surface portion 1032. Thus, in this embodiment, the stable operation | movement of the movable member 102 is ensured by hold | maintaining the retainer 105 in the 1st position and the 2nd position in the stable state.

  The means for holding the retainer 105 in a stable state at the first position and the second position is not limited to the magnetic attractive force, and for example, an elastic force such as a spring or an electrostatic force may be used. Good. Other configurations and operational effects are the same as those in the first embodiment.

(Fourth embodiment)
Next, with reference to FIG. 11, an image blur correction apparatus according to a fourth embodiment of the present invention will be described. FIG. 11 is a cross-sectional view of the main part along the optical axis of the image blur correction apparatus when the retainer 105 is in the first position. In addition, about the part which overlaps or corresponds to 1st Embodiment, the same code | symbol is attached | subjected to each figure and the description is abbreviate | omitted.

  In each said embodiment, the case where the support surfaces, such as two rolling balls 104 from which a curvature radius each differs in the movable member 102 and the fixed base plate 103, was continuously arrange | positioned in radial direction was illustrated. On the other hand, in this embodiment, support surfaces such as three or more (infinite number in this embodiment) rolling balls 104 having different curvature radii are continuously arranged in the radial direction on the movable member 102 and the fixed ground plate 103. Take the case as an example.

  As shown in FIG. 11, in the image shake correction apparatus 400 of the present embodiment, the radius of curvature of the support surface 4021 of the rolling ball 104 in the movable member 102 continuously changes in the radial direction such as a hyperbola or a parabola. Formed by countless regions. In the present embodiment, the support surface 4021 has a smaller radius of curvature as the radial distance of the movable member 102 increases.

  Similarly, the support surface 4031 of the rolling ball 104 in the fixed ground plate 103 similarly corresponds to the support surface 4021 of the movable member 102, for example, an innumerable region in which the radius of curvature continuously changes in the radial direction, such as a hyperbola or a parabolic shape. Formed by.

  Then, by changing the rotational position of the retainer 105, the contact point between the rolling ball 104 and the support surface 4021 of the movable member 102 and the support surface 4031 of the fixed ground plate 103 can be selected. When this contact point moves to the outer peripheral side, the radius of curvature of the movable surface of the movable member 102 can be reduced, and when the contact point moves to the inner peripheral side, the curvature of the movable surface of the movable member 102 The radius can be increased. That is, by continuously changing the rotational position of the retainer 105, the radius of curvature of the movable surface of the movable member 102 can be continuously changed.

  If the movable region in the radial direction of the movable member 102 is increased, the radius of curvature that the movable member 102 moves changes near the center and the boundary of the moving range. Therefore, an optical design that anticipates the amount of change is required. Other configurations and operational effects are the same as those in the first embodiment.

  The configuration of the present invention is not limited to those illustrated in the above embodiments, and the material, shape, dimensions, form, number, arrangement location, and the like can be changed as appropriate without departing from the scope of the present invention. is there.

  For example, in each of the above embodiments, an image shake correction apparatus mounted on an imaging apparatus such as a digital camera or a digital video camera, or an optical apparatus such as an interchangeable lens for a digital single lens reflex camera is exemplified, but the present invention is not limited to this. For example, an image blur correction device mounted on an optical apparatus such as an observation device such as a binocular, a telescope, or a field scope may be used.

DESCRIPTION OF SYMBOLS 101 Correction lens 102 Movable member 1021 Support plane part 1022 Support spherical surface part 103 Fixed ground plane 1031 Support plane part 1032 Support spherical part 104 Rolling ball 105 Retainer 1051 Cam groove part 106 Energizing spring

Claims (11)

A fixing member having a first region;
A movable member that holds the image blur correction optical system and has a second region facing the first region in the optical axis direction;
The movable member is disposed between the fixed member and the movable member, and is movable in a direction intersecting the optical axis with respect to the fixed member in contact with the second region and the first region. A supporting member that supports
A guide member that guides the support member in a range of the first region of the fixing member and changes a contact position between the support member and the first region to be selectable;
Biasing means for biasing the movable member and the fixed member toward each other, and in at least one of the second region and the first region, spherical surfaces having different curvature radii are provided. An image blur correction device formed continuously.   2. The image blur correction device according to claim 1, wherein three or more spherical surfaces having different radii of curvature are continuously formed in at least one of the second region and the first region. .   The image blur correction device according to claim 2, wherein the three or more spherical surfaces having different curvature radii formed continuously are formed in a hyperbola or a parabola.   4. The image blur correction device according to claim 1, wherein the spherical surfaces having different curvature radii are formed continuously in a radial direction. 5.   5. The image blur correction apparatus according to claim 1, wherein the first region and the second region are formed of concentric spherical surfaces. 6.   The said guide member is rotatably supported with respect to the said fixing member, The said support member is guided by rotation, and the said contact position is changed, The said contact position is characterized by the above-mentioned. Image shake correction device.   The image blur correction apparatus according to claim 1, wherein the support member rolls and supports the movable member.   The image blur correction apparatus according to claim 1, wherein the support member slides and supports the movable member.   9. The image blur correction according to claim 1, further comprising a holding unit that operably holds the guide member in a state where the contact position of the support member is changed by the guide member. apparatus. An optical apparatus including an image blur correction device,
An optical apparatus comprising the image blur correction device according to claim 1 as the image blur correction device. An imaging apparatus including an image shake correction apparatus,
An image pickup apparatus comprising the image shake correction apparatus according to claim 1 as the image shake correction apparatus.

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