JP2007041326A - Image stabilizer and imaging apparatus - Google Patents

Image stabilizer and imaging apparatus Download PDF

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JP2007041326A
JP2007041326A JP2005226019A JP2005226019A JP2007041326A JP 2007041326 A JP2007041326 A JP 2007041326A JP 2005226019 A JP2005226019 A JP 2005226019A JP 2005226019 A JP2005226019 A JP 2005226019A JP 2007041326 A JP2007041326 A JP 2007041326A
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lens
image blur
blur correction
image
lens support
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Mitsuhiro Togashi
光宏 富樫
Tadao Kawamoto
忠夫 川本
Masae Miyagawa
正衛 宮川
Takashi Sasaoka
孝至 笹岡
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To correct an image blur by low consumption of power without making a servo correction to the effect of gravity, by controlling a lens in a rotary system. <P>SOLUTION: The image stabilizer includes: a lens fixing section 110: a lens support section 120 rotatable around two axes in a yaw direction/a pitch direction relative to the lens fixed part; the single lens L having a curved face on at least one of the sides; a vibration detecting device 220 that detects vibration of imaging equipment: and a drive section 130 that rotates a lens support member in the yaw direction and/or pitch direction so that movement of an image point, caused by an image blur, may be corrected according to the output of the vibration detecting means. This makes it possible to make corrections in the yaw direction and pitch direction by the single lens. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は，像ぶれ補正装置およびその像ぶれ補正装置を備えたビデオカメラやスチルカメラなどの撮像装置に関する。   The present invention relates to an image blur correction apparatus and an imaging apparatus such as a video camera or a still camera equipped with the image blur correction apparatus.

ビデオカメラやスチルカメラを手で保持して撮影する場合には，人間の手が微小な回転運動をするために，撮像位置が変動してしまい，ビデオカメラの場合は撮像画像がぶれる，スチルカメラの場合は撮像画像がぼけるという問題がある。そのため，従来から撮像位置変動を防止する機能を有した機構が知られている。   When shooting with a video camera or still camera held by hand, the shooting position fluctuates due to the minute rotation of the human hand, and in the case of a video camera, the captured image is blurred. In this case, there is a problem that the captured image is blurred. For this reason, a mechanism having a function of preventing imaging position fluctuation has been known.

例えば，図１１に示すように，手振れが生じた場合に，レンズ１０を伸縮バネのような線形アクチュエータで垂直方向に駆動して像ぶれを補正する機構（特開平９−８０５５６号公報参照）が提案されている。   For example, as shown in FIG. 11, there is a mechanism (see Japanese Patent Laid-Open No. 9-80556) for correcting image blur by driving the lens 10 in the vertical direction with a linear actuator such as a telescopic spring when camera shake occurs. Proposed.

これらの構造では，補正光学系を光軸に垂直方向に偏心させる方法を採用している。このような場合，補正光学系を偏心させると光学性能が低下するため，極力偏心が無い状態にする事が必要である。しかし，補正光学系は常時重力Ｇに引っ張られるため，この重力Ｇに打ち勝つように補正光学系を常にサーボ駆動して中央位置に保持する必要がある。   In these structures, a method of decentering the correction optical system in the direction perpendicular to the optical axis is employed. In such a case, if the correction optical system is decentered, the optical performance is deteriorated. Therefore, it is necessary to make the decentering as small as possible. However, since the correction optical system is always pulled by the gravity G, it is necessary to always drive the correction optical system to maintain the central position so as to overcome the gravity G.

また，上記のようなサーボ駆動によるエネルギーロスを回避するために，図１２に示すように，回転式の補正光学系（特開平６−１９７２５８号公報参照）も提案されているが，ヨー方向振動とピッチ方向振動をそれぞれ別の補正光学系で補正する必要があるため，構造が複雑となるという問題があった。   In order to avoid the energy loss due to the servo drive as described above, as shown in FIG. 12, a rotational correction optical system (see JP-A-6-197258) has also been proposed. In addition, there is a problem that the structure becomes complicated because it is necessary to correct vibrations in the pitch direction with different correction optical systems.

特開平９−８０５５６号公報Japanese Patent Laid-Open No. 9-80556 特開平６−１９７２５８号公報JP-A-6-197258

本発明は，従来の像ぶれ補正装置および撮像装置が有する上記問題点に鑑みてなされたものであり，重力の影響を受けずに，ヨー方向とピッチ方向の補正が可能であり，したがって，余分なエネルギーを必要とせず，低消費電力で像ぶれ補正を実現できる，新規かつ改良された像ぶれ補正装置および撮像装置を提供することを目的としている。   The present invention has been made in view of the above-described problems of the conventional image blur correction apparatus and imaging apparatus, and can correct the yaw direction and the pitch direction without being affected by gravity. An object of the present invention is to provide a new and improved image blur correction apparatus and image pickup apparatus that can realize image blur correction with low power consumption without requiring a large amount of energy.

上記課題を解決するために，本発明の第１の観点によれば，レンズ固定部と；レンズ固定部に対してヨー方向およびピッチ方向に２軸回転可能なレンズ支持部と；レンズ支持部に支持され，少なくとも一面が曲面に形成された単一レンズと；撮像機器の振動を検知する振動検出装置と；振動検出手段の出力に応じて像ぶれによる像点移動を補正するように，レンズ支持部材をヨー方向および／またはピッチ方向に回転させる駆動部と；を備えることを特徴とする像ぶれ補正装置が提供される。   In order to solve the above-described problem, according to a first aspect of the present invention, a lens fixing portion; a lens support portion that is biaxially rotatable in the yaw direction and the pitch direction with respect to the lens fixing portion; A single lens that is supported and has at least one surface formed into a curved surface; a vibration detection device that detects vibration of the imaging device; and a lens support that corrects image point movement due to image blur according to the output of the vibration detection means An image blur correction apparatus comprising: a drive unit that rotates the member in the yaw direction and / or the pitch direction.

かかる構成によれば，単一のレンズによりヨー方向とピッチ方向の補正が可能であり，レンズの支持点とレンズの重心が一致するように，回転式にレンズを制御することにより重力の影響を受けず，余分なエネルギーを必要とせず，低消費電力で像ぶれ補正を実現できる。   According to this configuration, the yaw direction and the pitch direction can be corrected with a single lens, and the influence of gravity can be reduced by controlling the lens in a rotational manner so that the lens support point and the center of gravity of the lens coincide. Therefore, image blur correction can be achieved with low power consumption without requiring extra energy.

上記構成において，レンズ支持部の２軸の各回転中心は，単一レンズの曲面の曲率中心と概略一致するように構成すれば，レンズ面の光軸に対するオフセットが発生しないため，収差の発生が少なく，画像品質を良好に保った状態で像ぶれ補正を実現できる。   In the above configuration, if each rotation center of the two axes of the lens support portion is configured to substantially coincide with the center of curvature of the curved surface of the single lens, no offset is generated with respect to the optical axis of the lens surface, so that aberration is generated. Less image blur correction can be achieved while maintaining good image quality.

上記構成において，駆動部は，レンズ固定部またはレンズ支持部のいずれか一方に配置される複数の磁石部材と，各磁石部材に対応してレンズ固定部またはレンズ支持部のいずれか他方に配置される複数のコイル／ヨーク部材とから構成することができる。かかる構成によれば，振動検出装置の出力に応じてコイルに所定電流を通電することにより容易にレンズ支持部を駆動し像ぶれ補正を実現することができる。その際に，磁石部材をレンズ支持部側に配置し，コイル／ヨーク部材をレンズ固定部側に配置すれば，被駆動部をフリーに構成できるので，構造が簡単になる。   In the above configuration, the driving unit is disposed on either the lens fixing unit or the lens supporting unit corresponding to each magnet member, and the plurality of magnet members disposed on either the lens fixing unit or the lens supporting unit. A plurality of coil / yoke members. According to such a configuration, it is possible to easily drive the lens support unit and realize image blur correction by supplying a predetermined current to the coil according to the output of the vibration detection device. At this time, if the magnet member is disposed on the lens support portion side and the coil / yoke member is disposed on the lens fixing portion side, the driven portion can be configured freely, and the structure becomes simple.

また，各磁石部材の周方向長さを対応する各ヨーク部材の周方向長さに概略等しく構成すれば，特段のストッパを設けずとも，周方向への回り止めを制御することが可能となる。   Further, if the circumferential length of each magnet member is configured to be approximately equal to the circumferential length of the corresponding yoke member, it is possible to control rotation in the circumferential direction without providing a special stopper. .

また，磁石部材とコイル／ヨーク部材との間に磁性流体を充填する構成を採用すれば，主共振における共振振幅を抑えられるため，稼動部の制御性を高めることが可能となる。   In addition, if a configuration in which a magnetic fluid is filled between the magnet member and the coil / yoke member is adopted, the resonance amplitude at the main resonance can be suppressed, so that the controllability of the operating part can be improved.

さらに，本発明の別の観点によれば，上記構成の像ぶれ補正装置を備えたことを特徴とする撮像装置が提供される。   Further, according to another aspect of the present invention, there is provided an imaging apparatus including the image blur correction apparatus having the above configuration.

かかる構成によれば，単一のレンズによりヨー方向とピッチ方向の補正が可能であり，レンズの支持点とレンズの重心が一致するように，回転式にレンズを制御することにより重力の影響を受けず，余分なエネルギーを必要とせず，低消費電力で像ぶれ補正を実現できる。   According to this configuration, the yaw direction and the pitch direction can be corrected with a single lens, and the influence of gravity can be reduced by controlling the lens in a rotational manner so that the lens support point and the center of gravity of the lens coincide. Therefore, image blur correction can be achieved with low power consumption without requiring extra energy.

以下添付図面を参照しながら，本発明の好適な実施形態について説明する。なお，以下の説明および図面において，実質的に同一の機能構成を有する要素については同一の符号を付することにより重複説明を省略することにする。   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description and drawings, elements having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

まず図１を参照しながら，本発明の実施形態にかかる像ぶれ補正装置の原理について説明する。図１（ａ）は，手振れによりカメラ全体が傾いた時の図である。この図ではレンズを基準にしているため，入射光が傾いて描いてある。この時，結像位置が移動するが，図１（ｂ）に示すようにレンズを傾ける事で結像位置を元の位置に戻すことができる。   First, the principle of an image blur correction apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 1A is a diagram when the entire camera is tilted due to camera shake. In this figure, since the lens is used as a reference, the incident light is shown tilted. At this time, the imaging position moves, but the imaging position can be returned to the original position by tilting the lens as shown in FIG.

この事は次の様に説明することが出来る。レンズはプリズムの集合体であると考える事ができるので，極端な場合として，入射側の面を球面，反対側の面を平面として考える。なお，実際には片面が完全な平面である必要は無い。図２に示すように，レンズの回転中心と球面側の曲率中心を一致させて，レンズの球面側の曲率中心でレンズを傾けた場合には，球面側はレンズ傾きで変化しないので考慮する必要がなく，平面側の効果のみを考えれば良くなる。   This can be explained as follows. Since the lens can be considered as an aggregate of prisms, in an extreme case, the incident side surface is considered as a spherical surface and the opposite side surface as a flat surface. In practice, one side does not have to be a complete plane. As shown in FIG. 2, when the center of curvature of the lens and the center of curvature of the spherical surface are matched and the lens is tilted at the center of curvature of the spherical surface of the lens, the spherical side does not change with the lens tilt, so it must be considered. There is no need to consider only the effect on the flat side.

その結果，図３に示すように，平面側の効果を考慮して，像ぶれを補正すればよい。屈折率ｎの媒体からαの傾きを持つ境界面に光が入射した場合にはスネル（ｓｎｅｌｌ）の法則から次の式が成り立つ。   As a result, as shown in FIG. 3, the image blur may be corrected in consideration of the effect on the plane side. When light is incident on a boundary surface having an inclination of α from a medium having a refractive index n, the following equation is established from Snell's law.

Figure 2007041326
ここで角度は十分小さいので，次の様に近似できる。
Figure 2007041326
 レンズを傾ける役割はθ0が発生した時に，βを0にすることであるから，
Figure 2007041326
 となるようにα（レンズ傾き）を制御してやれば像点移動が無くなる。
Figure 2007041326
 Here, the angle is sufficiently small and can be approximated as follows.
Figure 2007041326
 Since the role of tilting the lens is to set β to 0 when θ 0 occurs,
Figure 2007041326
 If α (lens tilt) is controlled so as to be, the image point movement is eliminated.

以上の様に，レンズ傾きにより像点の補正が可能である事が分かる。また，本実施の形態によれば，重心と回動するための接点を結ぶ直線を重力の方向に一致させることができるので，重力によってレンズが傾く事がないため，定常状態でレンズを重力の影響に逆らって駆動する必要は無くなる。   As described above, it can be seen that the image point can be corrected by the lens tilt. Further, according to the present embodiment, since the straight line connecting the contact point for rotation with the center of gravity can be made coincident with the direction of gravity, the lens is not tilted by gravity, so that the lens is moved in a steady state. There is no need to drive against the influence.

次に，図４〜図８を参照しながら，本実施形態にかかる像ぶれ補正装置について詳細に説明する。図４および図５は像ぶれ補正装置の概略的なブロック図であり，図６は像ぶれ補正装置の一実施形態に補正駆動系アセンブリの概略的な見取り図であり，図７は同補正駆動系アセンブリの平面図であり，図８は図６に示す補正駆動系アセンブリのＡ−Ａ断面図であり，図８は図６に示す補正駆動系アセンブリのＢ−Ｂ断面図である。なお，本実施の形態にかかる像ぶれ補正装置は，ビデオカメラやスチルカメラなどの撮像装置に適用されるものであるが，撮像装置の詳細な構成については省略する。   Next, the image blur correction device according to the present embodiment will be described in detail with reference to FIGS. 4 and 5 are schematic block diagrams of the image blur correction apparatus, FIG. 6 is a schematic sketch of a correction drive system assembly in one embodiment of the image blur correction apparatus, and FIG. 8 is a plan view of the assembly. FIG. 8 is a cross-sectional view taken along line AA of the correction drive system assembly shown in FIG. 6, and FIG. 8 is a cross-sectional view taken along line BB of the correction drive system assembly shown in FIG. Note that the image blur correction apparatus according to the present embodiment is applied to an imaging apparatus such as a video camera or a still camera, but a detailed configuration of the imaging apparatus is omitted.

図４に示すように，本実施の形態にかかる像ぶれ補正装置は，補正駆動系アセンブリ１００と補正制御系２００とから主に構成されている。   As shown in FIG. 4, the image blur correction apparatus according to the present embodiment mainly includes a correction drive system assembly 100 and a correction control system 200.

補正駆動系アセンブリ１００は，レンズ固定部１１０と，レンズ固定部１１０に対してヨー方向およびピッチ方向に２軸回転可能なレンズ支持部１２０と，レンズ支持部１１０に支持され，少なくとも一面が曲面に形成された単一レンズＬと，レンズ支持部をヨー方向および／またはピッチ方向に回転させる駆動部１３０とから主に構成される。   The correction drive system assembly 100 is supported by the lens fixing portion 110, the lens support portion 120 that can rotate biaxially in the yaw direction and the pitch direction with respect to the lens fixing portion 110, and the lens support portion 110, and at least one surface is curved. It is mainly comprised from the formed single lens L and the drive part 130 which rotates a lens support part in a yaw direction and / or a pitch direction.

補正制御系２００は，ＣＣＤやＣＭＯＳなどの撮像素子２１０と，撮像素子２１０からの信号に応じて撮像装置の振動を検出する振動検出装置２２０と，振動検出装置２２０からの検出信号に基づいて補正駆動系１００を駆動する駆動信号を発生する回転駆動制御系２３０から主に構成されている。   The correction control system 200 performs correction based on an image sensor 210 such as a CCD or CMOS, a vibration detection device 220 that detects vibration of the image pickup device according to a signal from the image sensor 210, and a detection signal from the vibration detection device 220. The rotation drive control system 230 mainly generates a drive signal for driving the drive system 100.

上記実施形態では，補正制御系２００を，ＣＣＤやＣＭＯＳなどの撮像素子２１０により撮像装置の振動を検出する構成を採用したが，図５に示すように，補正制御系２００´を，カメラなどの撮像装置に取り付けられた角速度センサ２４０と，角速度センサ２４０により検出された撮像装置の角度変化に応じて撮像装置の振動を検出する振動検出装置２２０と，振動検出装置２２０からの検出信号に基づいて補正駆動系１００を駆動する駆動信号を発生する回転駆動制御系から構成することもできる。   In the above embodiment, the correction control system 200 is configured to detect the vibration of the image pickup apparatus by the image pickup element 210 such as a CCD or a CMOS. However, as shown in FIG. Based on an angular velocity sensor 240 attached to the imaging device, a vibration detection device 220 that detects vibration of the imaging device in accordance with a change in the angle of the imaging device detected by the angular velocity sensor 240, and a detection signal from the vibration detection device 220. A rotational drive control system that generates a drive signal for driving the correction drive system 100 can also be used.

さらに図６〜図９を参照しながら補正駆動系アセンブリ１００の構成について説明する。なお図６〜図９において，単一レンズＬについては，説明の簡略のために，省略ないし点線にて示している。   Further, the configuration of the correction drive system assembly 100 will be described with reference to FIGS. 6 to 9, the single lens L is omitted or indicated by a dotted line for simplicity of explanation.

レンズ固定部１１０は，プラスチック等の剛性部材から成り，中央にレンズ支持部１２０を嵌め込むための略円形の穴が設けられている。レンズ支持部１２０は，プラスチック等の剛性部材から成る椀形状の部材であり，中央に単一レンズＬを嵌め込むための略円形の穴が設けられている。レンズ支持部１２０は，レンズ固定部１１０に対してヨー方向およびピッチ方向に２軸回転可能なように取り付けられる。   The lens fixing part 110 is made of a rigid member such as plastic, and has a substantially circular hole for fitting the lens support part 120 in the center. The lens support 120 is a bowl-shaped member made of a rigid member such as plastic, and is provided with a substantially circular hole for fitting the single lens L in the center. The lens support unit 120 is attached to the lens fixing unit 110 so as to be biaxially rotatable in the yaw direction and the pitch direction.

ヨー方向にレンズ支持部１２０を回転駆動するためのヨー方向駆動部１３０Ｙは，ヨー方向回転軸に沿ってレンズ固定部１１０に設けられた穴の両側にそれぞれ対を成すように設けられるヨーク部材１３２Ｙとコイル部材１３４Ｙ，各ヨーク部材１３２Ｙとコイル部材１３４Ｙに対応するようにレンズ支持部１２０側に設けられる磁石部材１３６Ｙから構成される。同様にピッチ方向にレンズ支持部１２０を回転駆動するためのピッチ方向駆動部１３０Ｐは，ピッチ方向回転軸に沿ってレンズ固定部１１０に設けられた穴の両側にそれぞれ対を成すように設けられるヨーク部材１３２Ｐとコイル部材１３４Ｐ，各ヨーク部材１３２Ｐとコイル部材１３４Ｐに対応するようにレンズ支持部１２０側に設けられる磁石部材１３６Ｐから構成される。   Yaw direction drive unit 130Y for rotating lens support unit 120 in the yaw direction is provided with a yoke member 132Y provided in pairs on both sides of a hole provided in lens fixing unit 110 along the yaw direction rotation axis. And a coil member 134Y, and each magnet member 136Y provided on the lens support portion 120 side so as to correspond to each yoke member 132Y and the coil member 134Y. Similarly, the pitch direction drive unit 130P for rotationally driving the lens support unit 120 in the pitch direction is a yoke provided to form a pair on both sides of the hole provided in the lens fixing unit 110 along the pitch direction rotation axis. It is composed of a member 132P and a coil member 134P, and a magnet member 136P provided on the lens support portion 120 side so as to correspond to each yoke member 132P and the coil member 134P.

さらに，各ヨー方向駆動部１３０Ｙとピッチ方向駆動部１３０Ｐとの間には，ボールベアリング１３８が取り付けられて，レンズ支持部１２０の回転が円滑に行われるような構成となっている。図示の例では，ボールベアリング１３８は，９０度置きに均等に４個配列されているが，ボールベアリング１３８の配置位置および個数はこれに限定されない。また，図示は省略するが，磁石部材１３６Ｙ，１３６Ｐとコイル部材１３４Ｙ，１３４Ｐ／ヨーク部材１３２Ｙ，１３２Ｐとの間に磁性流体を充填する構成を採用すれば，主共振における共振振幅を抑えられるため，可動部の制御性を高めることができる。   Further, a ball bearing 138 is attached between each yaw direction driving unit 130Y and the pitch direction driving unit 130P, so that the lens support unit 120 is smoothly rotated. In the illustrated example, four ball bearings 138 are evenly arranged at intervals of 90 degrees, but the arrangement position and number of ball bearings 138 are not limited to this. Although illustration is omitted, if the configuration in which the magnetic fluid is filled between the magnet members 136Y and 136P and the coil members 134Y and 134P / yoke members 132Y and 132P is adopted, the resonance amplitude at the main resonance can be suppressed. Controllability of the movable part can be improved.

上記のように補正駆動系１００を構成することにより，コイル１３４Ｙまたはコイル１３４Ｐに供給する電流値を制御することにより，所望の大きさの引力または斥力生成させ，レンズ支持部１２０により支持される単一レンズＬをヨー方向および／またはピッチ方向に回転駆動させ，像ぶれの補正をすることができる。その際に，本実施の形態にかかる補正駆動系１００によれば，レンズの支持点とレンズの重心が一致するように，回転式にレンズが制御されるので，重力の影響を受けず，したがって，余分なエネルギーを必要とせず，低消費電力で像ぶれ補正を実現できる。   By configuring the correction drive system 100 as described above, the current value supplied to the coil 134Y or the coil 134P is controlled to generate an attractive force or repulsive force of a desired magnitude, and a single unit supported by the lens support unit 120. One lens L can be rotationally driven in the yaw direction and / or the pitch direction to correct image blur. At this time, according to the correction drive system 100 according to the present embodiment, the lens is controlled so that the lens support point and the center of gravity of the lens coincide with each other, and therefore, the lens is not affected by gravity, and therefore. , Image blur correction can be realized with low power consumption without requiring extra energy.

なお，上記構成においては，磁石部材１３６Ｙ，１３６Ｐをレンズ支持部１２０側に配置し，コイル部材１３４Ｙ，１３４Ｐ／ヨーク部材１３２Ｙ，１３２Ｐをレンズ固定部１１０側に配置することにより，被駆動部であるレンズ支持部１２０をフリーに構成している。しかし，本発明はかかる例に限定されるものではなく，磁石部材１３６Ｙ，１３６Ｐをレンズ固定部１１０側に配置し，コイル部材１３４Ｙ，１３４Ｐ／ヨーク部材１３２Ｙ，１３２Ｐをレンズ固定部１２０側に配置する構成を採用しても良い。   In the above configuration, the magnet members 136Y and 136P are arranged on the lens support portion 120 side, and the coil members 134Y and 134P / yoke members 132Y and 132P are arranged on the lens fixing portion 110 side, thereby being driven parts. The lens support part 120 is configured to be free. However, the present invention is not limited to such an example, and the magnet members 136Y and 136P are arranged on the lens fixing unit 110 side, and the coil members 134Y and 134P / yoke members 132Y and 132P are arranged on the lens fixing unit 120 side. A configuration may be adopted.

上記構成において，レンズ支持部１２０の２軸の各回転中心は，図２に関連して説明したように，レンズＬの回転中心と球面側の曲率中心を一致させて，レンズＬの球面側の曲率中心でレンズＬを傾ける構成にすれば，球面側はレンズＬ傾きで変化しないので，レンズ面の光軸に対するオフセットが発生しないため，収差の発生が少なく，画像品質を良好に保った状態で像ぶれ補正を実現できる。   In the above-described configuration, the rotation centers of the two axes of the lens support portion 120 are aligned with the rotation center of the lens L and the center of curvature on the spherical surface side as described with reference to FIG. If the lens L is tilted at the center of curvature, the spherical surface does not change with the tilt of the lens L, so that no offset occurs with respect to the optical axis of the lens surface, so there is little aberration and the image quality is kept good. Image blur correction can be realized.

また，図１０に示すように，各磁石部材１３６Ｙ，１３６Ｐの周方向長さを対応する各ヨーク部材１３２Ｙ，１３２Ｐの周方向長さに概略等しく構成すれば，磁石部材１３６Ｙ，１３６Ｐのヨーク部材１３２Ｙ，１３２Ｐに対する吸引力から，磁石部材１３６Ｙ，１３６Ｐが円周方向にヨーク部材１３２Ｙ，１３２Ｐから外れようとしても復帰力が発生するので，特段のストッパを設けずとも，周方向への回転を制御することが可能となる。   Further, as shown in FIG. 10, if the circumferential lengths of the magnet members 136Y and 136P are substantially equal to the circumferential lengths of the corresponding yoke members 132Y and 132P, the yoke members 132Y of the magnet members 136Y and 136P are configured. , 132P, even if the magnet members 136Y, 136P try to disengage from the yoke members 132Y, 132P in the circumferential direction, a restoring force is generated, so that rotation in the circumferential direction is controlled without providing a special stopper. It becomes possible.

次に，上記のように構成される像ぶれ補正装置の動作について説明する。レンズＬを通過して撮像素子２１０により検知される像が，手振れなどにより，ずれが生じた場合には，振動検出装置２２０が，そのずれ量を算出する。回転制御部２３０は，振動検出装置２２０により算出されたずれ量を補正するように，ヨーク駆動部１３０Ｙおよび／またはピッチ駆動部１３０Ｐに，所定量の電流を供給する。ヨーク駆動部１３０Ｙおよび／またはピッチ駆動部１３０Ｐは，供給された電流に応じて，レンズ支持部１２０をヨーク方向および／またはピッチ方向に像ぶれを補正するように回転駆動させる。その結果，レンズ支持部１２０により支持されるレンズＬも所定量だけヨーク方向および／またはピッチ方向に回転駆動され，像ぶれを補正することができる。   Next, the operation of the image blur correction apparatus configured as described above will be described. When an image that passes through the lens L and is detected by the image sensor 210 is displaced due to camera shake or the like, the vibration detection device 220 calculates the amount of displacement. The rotation control unit 230 supplies a predetermined amount of current to the yoke driving unit 130Y and / or the pitch driving unit 130P so as to correct the deviation amount calculated by the vibration detection device 220. The yoke driving unit 130Y and / or the pitch driving unit 130P rotates and drives the lens support unit 120 so as to correct image blur in the yoke direction and / or the pitch direction according to the supplied current. As a result, the lens L supported by the lens support unit 120 is also rotationally driven in the yoke direction and / or pitch direction by a predetermined amount, and image blur can be corrected.

以上説明したように，本実施の形態にかかる像ぶれ補正装置によれば，単一のレンズによりヨー方向とピッチ方向の補正が可能であり，レンズの支持点とレンズの重心が一致するように，回転式にレンズを制御することにより重力の影響を受けず，余分なエネルギーを必要とせず，低消費電力で像ぶれ補正を実現できる。   As described above, according to the image blur correction device according to the present embodiment, it is possible to correct the yaw direction and the pitch direction with a single lens so that the support point of the lens and the center of gravity of the lens coincide. By controlling the lens in a rotating manner, it is not affected by gravity, requires no extra energy, and can achieve image blur correction with low power consumption.

以上添付図面を参照しながら，本発明の好適な実施形態について説明したが，本発明はかかる例に限定されないことは言うまでもない。当業者であれば，特許請求の範囲に記載された技術的思想の範疇内において，各種の変更例または修正例に想到し得ることは明らかであり，それらについても当然に本発明の技術的範囲に属するものと了解される。   While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

本発明は，像ぶれ補正装置およびその像ぶれ補正装置を備えたビデオカメラやスチルカメラなどの撮像装置に適用可能である。   The present invention is applicable to an image blur correction device and an imaging device such as a video camera or a still camera equipped with the image blur correction device.

像ぶれ補正の原理を説明する説明図である。It is explanatory drawing explaining the principle of image blur correction. レンズの球面の曲率中心とレンズの回転中心が一致している場合の像ぶれ補正の原理を説明する説明図である。It is explanatory drawing explaining the principle of an image blur correction in case the curvature center of the spherical surface of a lens and the rotation center of a lens correspond. レンズの平面側における像ぶれ補正の原理を説明する説明図である。It is explanatory drawing explaining the principle of image blur correction in the plane side of a lens. 本発明の実施の一形態にかかる像ぶれ補正装置の概略構成を示すブロック図である。1 is a block diagram showing a schematic configuration of an image blur correction apparatus according to an embodiment of the present invention. 本発明の実施の他の形態にかかる像ぶれ補正装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the image blurring correction apparatus concerning the other embodiment of this invention. 像ぶれ補正装置の一実施形態にかかる補正駆動系アセンブリの概略的な見取り図である。1 is a schematic sketch of a correction drive system assembly according to an embodiment of an image blur correction device. 図６に示す補正駆動系アセンブリの平面図である。FIG. 7 is a plan view of the correction drive system assembly shown in FIG. 6. 図６に示す補正駆動系アセンブリのＡ−Ａ断面図である。It is AA sectional drawing of the correction | amendment drive system assembly shown in FIG. 図６に示す補正駆動系アセンブリのＢ−Ｂ断面図である。FIG. 7 is a cross-sectional view of the correction drive system assembly shown in FIG. 磁石部材の周方向長さとヨーク／コイル部材の周方向長さとを一致させた場合の動作を示す説明図である。It is explanatory drawing which shows operation | movement at the time of making the circumferential direction length of a magnet member and the circumferential direction length of a yoke / coil member correspond. 従来の像ぶれ補正装置の概略構成を示す説明図である。It is explanatory drawing which shows schematic structure of the conventional image blurring correction apparatus. 従来の像ぶれ補正装置の概略構成を示す説明図である。It is explanatory drawing which shows schematic structure of the conventional image blurring correction apparatus.

符号の説明Explanation of symbols

１００ 補正駆動系
１１０ レンズ固定部
１２０ レンズ支持部
１３０（１３０Ｙ，１３０Ｐ） 駆動部
１３２Ｙ，１３２Ｐ ヨーク部材
１３４Ｙ，１３４Ｐ コイル部材
１３６Ｙ，１３６Ｐ 磁石部材
１３８ ボールベアリング
２００ 補正制御系
２１０ 撮像素子
２２０ 振動検出装置
２３０ 回転制御部
Ｌ レンズ DESCRIPTION OF SYMBOLS 100 Correction drive system 110 Lens fixing part 120 Lens support part 130 (130Y, 130P) Drive part 132Y, 132P Yoke member 134Y, 134P Coil member 136Y, 136P Magnet member 138 Ball bearing 200 Correction control system 210 Image sensor 220 Vibration detection device 230 Rotation control unit L Lens

Claims (7)

レンズ固定部と；
前記レンズ固定部に対してヨー方向およびピッチ方向に２軸回転可能なレンズ支持部と；
前記レンズ支持部に支持され，少なくとも一面が曲面に形成された単一レンズと；
撮像機器の振動を検知する振動検出装置と；
前記振動検出手段の出力に応じて前記像ぶれによる像点移動を補正するように，前記レンズ支持部材をヨー方向および／またはピッチ方向に回転させる駆動部と；
を備えることを特徴とする，像ぶれ補正装置。 A lens fixing part;
A lens support that is biaxially rotatable in the yaw direction and the pitch direction with respect to the lens fixing part;
A single lens supported by the lens support portion and having at least one surface formed into a curved surface;
A vibration detection device for detecting vibration of the imaging device;
A drive unit for rotating the lens support member in the yaw direction and / or the pitch direction so as to correct the image point movement due to the image blur according to the output of the vibration detection means;
An image blur correction device comprising: 前記レンズ支持部の２軸の各回転中心は，前記単一レンズの前記曲面の曲率中心と概略一致することを特徴とする，請求項１に記載の像ぶれ補正装置。 2. The image blur correction device according to claim 1, wherein the rotation centers of the two axes of the lens support portion substantially coincide with the curvature center of the curved surface of the single lens. 前記駆動部は：
前記レンズ固定部または前記レンズ支持部のいずれか一方に配置される複数の磁石部材と；
前記各磁石部材に対応して前記レンズ固定部または前記レンズ支持部のいずれか他方に配置される複数のコイル／ヨーク部材と；
から構成されることを特徴とする，請求項１または２のいずれかに記載の像ぶれ補正装置。 The drive unit is:
A plurality of magnet members disposed on either the lens fixing portion or the lens support portion;
A plurality of coil / yoke members disposed on the other of the lens fixing portion and the lens support portion corresponding to each of the magnet members;
The image blur correction device according to claim 1, wherein the image blur correction device is configured by: 前記磁石部材は，前記レンズ支持部側に配置され，前記コイル／ヨーク部材は，前記レンズ固定部側に配置されることを特徴とする，請求項３に記載の像ぶれ補正装置。 4. The image blur correction device according to claim 3, wherein the magnet member is disposed on the lens support portion side, and the coil / yoke member is disposed on the lens fixing portion side. 前記各磁石部材の周方向長さは，対応する前記各ヨーク部材の周方向長さに概略等しいことを特徴とする，請求項３または４のいずれかに記載の像ぶれ補正装置。 5. The image blur correction device according to claim 3, wherein the circumferential length of each magnet member is approximately equal to the circumferential length of each corresponding yoke member. 6. 前記磁石部材と前記コイル／ヨーク部材との間には磁性流体が充填されていることを特徴とする，請求項３〜５のいずれかに記載の像ぶれ補正装置。 6. The image blur correction device according to claim 3, wherein a magnetic fluid is filled between the magnet member and the coil / yoke member. 請求項１〜６のいずれかに記載の像ぶれ補正装置を備えたことを特徴とする撮像装置。 An image pickup apparatus comprising the image blur correction apparatus according to claim 1.
JP2005226019A 2005-08-03 2005-08-03 Image stabilizer and imaging apparatus Pending JP2007041326A (en)

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JP2008003361A (en) * 2006-06-23 2008-01-10 Sigma Corp Image blur preventing device
WO2009133690A1 (en) * 2008-04-30 2009-11-05 日本電産サンキョー株式会社 Optical unit having deflection correcting function, and photographing optical device
JP2010286810A (en) * 2009-05-15 2010-12-24 Nikon Corp Blur correction device and optical instrument
US8238736B2 (en) 2008-04-30 2012-08-07 Nidec Sankyo Corporation Optical unit with shake correcting function and photographic optical device
CN103117637A (en) * 2011-11-16 2013-05-22 Lg伊诺特有限公司 Voice coil motor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008003361A (en) * 2006-06-23 2008-01-10 Sigma Corp Image blur preventing device
WO2009133690A1 (en) * 2008-04-30 2009-11-05 日本電産サンキョー株式会社 Optical unit having deflection correcting function, and photographing optical device
US8238736B2 (en) 2008-04-30 2012-08-07 Nidec Sankyo Corporation Optical unit with shake correcting function and photographic optical device
CN102016709B (en) * 2008-04-30 2014-04-09 日本电产三协株式会社 Optical unit with shake correcting function and photographic optical device
JP2010286810A (en) * 2009-05-15 2010-12-24 Nikon Corp Blur correction device and optical instrument
CN103117637A (en) * 2011-11-16 2013-05-22 Lg伊诺特有限公司 Voice coil motor
US10516326B2 (en) 2011-11-16 2019-12-24 Lg Innotek Co., Ltd. Voice coil motor
US11682958B2 (en) 2011-11-16 2023-06-20 Lg Innotek Co., Ltd. Voice coil motor

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A912 Re-examination (zenchi) completed and case transferred to appeal board

Free format text: JAPANESE INTERMEDIATE CODE: A912

Effective date: 20090911