JPH0451677A - Image pickup device - Google Patents
Image pickup deviceInfo
- Publication number
- JPH0451677A JPH0451677A JP2161905A JP16190590A JPH0451677A JP H0451677 A JPH0451677 A JP H0451677A JP 2161905 A JP2161905 A JP 2161905A JP 16190590 A JP16190590 A JP 16190590A JP H0451677 A JPH0451677 A JP H0451677A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- image
- decentering
- imaging
- eccentricity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 63
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 238000003384 imaging method Methods 0.000 claims description 34
- 230000006641 stabilisation Effects 0.000 description 7
- 238000011105 stabilization Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （発明の目的） ［産業上の利用分野］ 本発明はビデオカメラなどの撮像装置に関する。[Detailed description of the invention] (Purpose of the invention) [Industrial application field] The present invention relates to an imaging device such as a video camera.
［従来の技術］
ビデオカメラは、近年、小型・軽量化、および高倍率、
多機能化に伴ってその普及は目覚ましいものがある。[Conventional technology] In recent years, video cameras have become smaller, lighter, and have higher magnification.
As they become more multi-functional, their popularity has been remarkable.
上述のビデオカメラでは、撮影に関する機能の殆どが自
動化されているため、ビデオカメラ自体の機能に起因す
る撮影の失敗は極めて少なくなっている。In the video camera described above, most of the functions related to photographing are automated, so that there are extremely few failures in photographing due to the functions of the video camera itself.
ところで、ビデオカメラで最も多用する手持ちの体勢で
は、画面は必ずブしているといって過言ではなく、この
ような画面ブレによる画質低下とともに、ビデオ酔いな
どの不快な状況が近年問題とされている。By the way, it is no exaggeration to say that in the hand-held position most often used with video cameras, the screen is always blurred, and in addition to the degradation of image quality due to screen blur, unpleasant situations such as video sickness have become a problem in recent years. There is.
上述の画ブレを解決する手段として、従来からジャイロ
機構を利用した画像安定化装置がある。As a means for solving the above-mentioned image blur, there has conventionally been an image stabilizing device using a gyro mechanism.
この装置では、レンズ鏡筒系をジャイロ機構により可動
させ安定した像を得るもので、この装置では、カメラ本
体が大型化されるとともに重量が増大するという問題が
ある。In this device, a lens barrel system is moved by a gyro mechanism to obtain a stable image, and the problem with this device is that the camera body becomes large and heavy.
そこで近年では、撮影光学系の光軸をカメラの振れに応
じて偏心させることにより光学像を撮像素子の所定の結
像面上に位置させる可変頂角プリズムなどの光軸偏心手
段から構成される像プレ補正手段を備えた撮像装置が開
発されている。Therefore, in recent years, optical axis decentering means such as a variable apex prism, which decenters the optical axis of the photographic optical system according to the shake of the camera and positions the optical image on a predetermined imaging plane of the image sensor, has been introduced. Imaging devices equipped with image pre-correction means have been developed.
上述の可変頂角プリズムは、２枚の透明板に挟持された
蛇腹を有するアコーディオン状の容器の内部に、一定の
屈折率を持った液体を封入した構成とされている。そし
て、被写体側の透明板を磁気回路からなる駆動機構によ
り傾動制御することにより撮影光軸を偏心させる。The variable apex angle prism described above has a structure in which a liquid having a constant refractive index is sealed inside an accordion-shaped container having a bellows sandwiched between two transparent plates. Then, the photographing optical axis is decentered by controlling the tilting of the transparent plate on the subject side by a drive mechanism consisting of a magnetic circuit.
このように上述の装置では、可変頂角プリズムより光軸
を偏心させるので、レンズ鏡筒系を可動させる必要がな
く、カメラ本体の大型化、重量の増大化を最小限とする
ことができ、像ブレを有効に防止した良好な画像を得る
ことができる。In this way, in the above-mentioned device, since the optical axis is decentered by the variable apex prism, there is no need to move the lens barrel system, and the increase in size and weight of the camera body can be minimized. It is possible to obtain a good image in which image blur is effectively prevented.
［発明が解決しようとする課題］
ところで、上述の可変頂角プリズム等の光軸偏心手段に
よる像プレ補正手段を備えた撮影装置では、録画動作中
に像プレ補正を非動作とすると、透明板を駆動する駆動
機構による傾動状態が解放され、透明板間に封入された
液体の流動性により２枚の透明板が平行となるセンタリ
ング動作が発生する。[Problems to be Solved by the Invention] By the way, in a photographing device equipped with an image pre-correction means using an optical axis decentering means such as the above-mentioned variable apex angle prism, if the image pre-correction is made inactive during recording operation, the transparent plate The tilting state caused by the drive mechanism that drives the transparent plates is released, and a centering operation in which the two transparent plates become parallel occurs due to the fluidity of the liquid sealed between the transparent plates.
このため、ファインダー像が不連続なものとなり、撮影
者に違和感を与えてしまう恐れがある。Therefore, the finder image becomes discontinuous, which may give the photographer a sense of discomfort.
本発明は、上述した従来の課題を解決するためのもので
、像プレ補正を有効に行なうことができ、しかも像プレ
補正を動作させた録画動作中に、像プレ補正を非動作状
態とさせても、画像の不連続を有効に防止することので
きる撮像装置を提供することを目的としている。The present invention is intended to solve the above-mentioned conventional problems, and is capable of effectively performing image pre-correction, and moreover, disables image pre-correction during a recording operation in which image pre-correction is activated. An object of the present invention is to provide an imaging device that can effectively prevent image discontinuity even when the images are discontinuous.
［課題を解決するための手段］
本発明は上記目的を達成するために、結像面上の光学像
を画像電気信号に変換する撮像手段と、この撮像手段か
らの画像電気信号の少なくとも記録を行なう記録手段と
、撮像装置本体の振れ量を検出する振れ検出手段と、前
記撮像手段の前記結像面上の所定の位置に前記光学像を
一致させるよう光軸を偏心させるための光軸偏心手段と
、前記振れ検出手段からの検出出力に基づいて前記光軸
偏心手段の偏心量を駆動制御する駆動制御手段と、前記
記録手段の動作中前記光軸偏心手段による光軸偏心駆動
が停止されたとき、（このときの）光軸偏心手段の光軸
偏心位置を保持するよう制御する制御手段とを備えたも
のである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides an imaging means for converting an optical image on an imaging plane into an image electrical signal, and at least recording of the image electrical signal from the imaging means. a shake detection means for detecting the amount of shake of the imaging device body; and an optical axis eccentricity for decentering the optical axis so that the optical image coincides with a predetermined position on the image forming surface of the imaging means. means, a drive control means for controlling the eccentricity of the optical axis eccentricity means based on a detection output from the shake detection means, and a drive control means for driving and controlling the eccentricity of the optical axis eccentricity means based on a detection output from the shake detection means, and a drive control means for driving and controlling the eccentricity of the optical axis eccentricity means by the optical axis eccentricity means while the recording means is in operation. and control means for controlling the optical axis eccentric position of the optical axis eccentric means (at this time) to be maintained when the optical axis eccentricity is changed.
また、制御手段は、前記記録手段の記録動作が停止され
ると、前記光軸偏心手段における光軸偏心位置の保持を
解除することを特徴としている。Further, the control means is characterized in that when the recording operation of the recording means is stopped, the control means releases the holding of the optical axis eccentric position in the optical axis eccentricity means.
［作 用コ
本発明では、制御手段により、記録手段の動作中に光軸
偏心手段による光軸偏心駆動が停止されたとき、光軸偏
心手段の光軸偏心位置を保持するように制御するので、
像プレ補正を有効に行なうことができるとともに、像プ
レ補正を動作させた録画動作中に、像プレ補正を非動作
状態とさせても、画像の不連続を有効に防止することが
できる。[Function] In the present invention, when the optical axis eccentric drive by the optical axis eccentric means is stopped while the recording means is in operation, the control means controls the optical axis eccentric position of the optical axis eccentric means to be maintained. ,
Image pre-correction can be effectively performed, and image discontinuity can be effectively prevented even if image pre-correction is inactive during a recording operation in which image pre-correction is activated.
［実施例］ 以下、本発明の実施例を図面に基づいて説明する。[Example] Embodiments of the present invention will be described below based on the drawings.
第１図は本発明の一実施例の撮像装置を説明するための
ブロック図である。FIG. 1 is a block diagram for explaining an imaging device according to an embodiment of the present invention.
同図において、ｌは光軸偏心手段である可変頂角プリズ
ム（Ｖ Ａ Ｐ ： Ｖａｒｉａｂｌｅ Ａｎｇｌｅ
Ｐｒｉｓｍ）、２は撮像光学系でフォーカシングレンズ
を含む撮像レンズ２ａと絞り２ｂを有する。撮像レンズ
２ａはフォーカス駆動回路３により駆動制御されるとと
もに、絞り２ｂはアイリス駆動回路４ａ、アイリス制御
回路４ｂにより撮像光学系の入射光量が制御されるよう
駆動される。In the same figure, l is a variable apex prism (V A P ) which is an optical axis decentering means.
Prism), 2 is an imaging optical system having an imaging lens 2a including a focusing lens and an aperture 2b. The imaging lens 2a is driven and controlled by a focus drive circuit 3, and the aperture 2b is driven by an iris drive circuit 4a and an iris control circuit 4b so that the amount of light incident on the imaging optical system is controlled.
５は撮像光学系２によって結像面に結像された被写体像
を光電変換して撮像信号に変換する撮像素子テするＣＣ
Ｄ、６はＣＣＤ５から図示を省略したプリアンプにより
増幅され出力された映像信号にガンマ補正、ブランキン
グ処理、同期信号の付加等、所定の処理を施して規格化
された標準テレビジョン信号に変換し、ビデオ出力端子
より出力するカメラプロセス回路である。カメラプロセ
ス回路６から出力されるテレビジョン信号は図示を省略
したビデオレコーダ部へ出力されるとともに、電子ビュ
ーファインダ等のモニタ７に供給される。Reference numeral 5 denotes a CC which is an image sensor that photoelectrically converts the subject image formed on the image plane by the imaging optical system 2 into an image signal.
D and 6 perform predetermined processing such as gamma correction, blanking processing, and addition of a synchronization signal to the video signal amplified and output from the CCD 5 by a preamplifier (not shown) and convert it into a standardized standard television signal. , is a camera process circuit that outputs from the video output terminal. The television signal output from the camera process circuit 6 is output to a video recorder section (not shown) and is also supplied to a monitor 7 such as an electronic viewfinder.
８はＣＣＤ５から出力された映像信号中から被写体像の
ボケ幅（被写体像のエツジ部分の幅）を検出するボケ幅
検出回路で、合焦状態に近付く程被写体のボケ幅が小さ
くなる性質を利用して合焦検出を行うものである。8 is a blur width detection circuit that detects the blur width of the subject image (width of the edge portion of the subject image) from the video signal output from the CCD 5, which utilizes the property that the blur width of the subject becomes smaller as it approaches the in-focus state. This is used to detect focus.
９はシステム全体の制御を司るたとえばマイクロコンピ
ュータにより構成される制御回路で、■１０ポート、Ａ
／Ｄコンバータ、ＲＯＭ、ＲＡＭから構成される。この
制御回路９には、上述のボケ幅検出回路８から出力され
るボケ幅情報および図示を省略したバンドパスフィルタ
からの高周波成分のピーク値情報を取り込み、映像の１
フイ一ルド期間におけるボケ幅が最小となるようかつ、
高周波成分のピーク値が最大となるよう上述の撮像レン
ズ２ａを駆動すべくフォーカス駆動回路３に所定の駆動
制御信号を出力する。また、制御回路９には、撮像装置
であるビデオカメラ本体の振れ量を検出する振れ検出セ
ンサ１０からの検出信号が入力され、この検出信号によ
る振れ量およびビデオカメラ本体の作動モードに応じて
光軸を補正する補正信号をＶＡＰ駆動回路１１に出力す
る。9 is a control circuit composed of, for example, a microcomputer, which controls the entire system; ■10 ports, A
Consists of a /D converter, ROM, and RAM. This control circuit 9 takes in the blur width information output from the blur width detection circuit 8 described above and the peak value information of high frequency components from a bandpass filter (not shown).
The blur width in the field period is minimized, and
A predetermined drive control signal is output to the focus drive circuit 3 to drive the above-mentioned imaging lens 2a so that the peak value of the high frequency component becomes maximum. Further, the control circuit 9 receives a detection signal from a shake detection sensor 10 that detects the amount of shake of the video camera body, which is an imaging device, and the control circuit 9 receives a detection signal from a shake detection sensor 10 that detects the amount of shake of the video camera body, which is an imaging device. A correction signal for correcting the axis is output to the VAP drive circuit 11.
これにより、ＶＡＰ駆動回路１１は、ＣＣＤ５の結像面
の所定の箇所に撮像光学系２からの光学像が結像される
ようＶＡＰＩを傾動させて光軸を偏心させる。Thereby, the VAP drive circuit 11 tilts the VAPI and decenters the optical axis so that the optical image from the imaging optical system 2 is formed on a predetermined location on the imaging surface of the CCD 5.
次に、上述した可変頂角プリズム（ＶＡＰ）１、振れ検
出センサ１０、ＶＡＰ駆動回路１１の詳細を第２図を用
いて説明する。Next, details of the variable apex angle prism (VAP) 1, shake detection sensor 10, and VAP drive circuit 11 described above will be explained using FIG.
同図に示すように、振れ検出センサ１０は円筒形のケー
ス１２の中に所定の屈折率を持つ液体１３が満たされて
おり、この液体１３中には所定の回転軸の回りに回転可
能な浮体１４を設けた構成とされている。この浮体１４
はケース１２を取り巻くように設けられた永久磁石１５
で構成されている閉磁気回路によって、ブレのない場合
には所定の位置に保持されるようになっている。そして
、ビデオカメラ本体にブレが生じ、浮体１４がケース１
２に対して相対的に回転すると、発光素子１６からの信
号光が浮体１４の表面で反射して位置検出用の受光素子
１７に入射されるようになっている。したがって、浮体
１４の位置により受光素子１７への光の入射位置が変化
し出力信号が変化する。受光素子１７からの出力信号は
位置検出回路１８を介して上述した制御回路９に出力さ
れる。As shown in the figure, the shake detection sensor 10 has a cylindrical case 12 filled with a liquid 13 having a predetermined refractive index, and the liquid 13 is rotatable around a predetermined rotation axis. The structure includes a floating body 14. This floating body 14
is a permanent magnet 15 provided so as to surround the case 12.
A closed magnetic circuit made up of the following ensures that it is held in a predetermined position when there is no shaking. Then, the video camera body shakes, and the floating body 14 moves to case 1.
2, the signal light from the light emitting element 16 is reflected on the surface of the floating body 14 and enters the light receiving element 17 for position detection. Therefore, the position of the light incident on the light receiving element 17 changes depending on the position of the floating body 14, and the output signal changes. The output signal from the light receiving element 17 is outputted to the above-mentioned control circuit 9 via the position detection circuit 18.
一方、可変頂角プリズムｌは２枚の透明板２１ａ、２１
ｂの間に挟持された蛇腹を有するアコーディオン状の容
器２２の内部に、一定の屈折率を持った液体２３を封入
した構成とされている。この可変頂角プリズムｌは撮像
光学系２、ＣＣＤ５の前面側に配置され、上述の振れ検
出センサｌＯ側の位置検出回路１８の出力に応じて制御
回路９により制御されるＶＡＰ駆動回路１１により磁気
回路２４が駆動されて可変頂角プリズムｌの被写体側の
透明板２１ａが傾動される。透明板２１ａの傾動量は検
知装置２５．２６により検知され、その出力信号は位置
検出回路２７を介して制御回路９に出力される。そして
、制御回路９では振れ検出センサ１０側の位置検出回路
１８の出力と可変頂角プリズム１側の位置検出回路２７
の出力の差が「０」となるようＶＡＰ駆動回路１１を制
御して磁気回路２４を駆動し可変頂角プリズムｌの透明
板２１ａを傾動させる。On the other hand, the variable apex angle prism l has two transparent plates 21a and 21
The structure is such that a liquid 23 having a constant refractive index is sealed inside an accordion-shaped container 22 having a bellows sandwiched between portions b. This variable apex angle prism l is arranged on the front side of the imaging optical system 2 and the CCD 5, and is magnetized by a VAP drive circuit 11 controlled by a control circuit 9 in accordance with the output of the position detection circuit 18 on the shake detection sensor lO side. The circuit 24 is driven to tilt the transparent plate 21a of the variable apex angle prism l on the object side. The amount of tilting of the transparent plate 21a is detected by the detection devices 25 and 26, and the output signal thereof is outputted to the control circuit 9 via the position detection circuit 27. In the control circuit 9, the output of the position detection circuit 18 on the shake detection sensor 10 side and the position detection circuit 27 on the variable apex angle prism 1 side are connected to each other.
The VAP drive circuit 11 is controlled to drive the magnetic circuit 24 so that the difference between the outputs becomes "0", and the transparent plate 21a of the variable apex angle prism l is tilted.
次に、本発明の撮像装置の特徴となる上述の制御回路９
の動作を第３図および第４図のフローチャートを用いて
説明する。Next, the above-mentioned control circuit 9 which is a feature of the imaging device of the present invention
The operation will be explained using the flowcharts of FIGS. 3 and 4.
ところで、本発明の撮像装置であるビデオカメラに使用
される光軸偏心手段である可変頂角プリズムはビデオカ
メラのフルオートモードのときと、撮影者の意志により
防振機能を０ＮＳＯＦＦすることのできるマニュアルモ
ードにおいて使用可能とされている。By the way, the variable apex angle prism, which is the optical axis decentering means used in the video camera, which is the imaging device of the present invention, can have its anti-shake function turned off by 0NS when the video camera is in full auto mode and at the will of the photographer. It can be used in manual mode.
まず、第３図に示すように、ビデオカメラのフルオート
モードの場合は、ビデオカメラがＲＥＣボーズ状態であ
るか否かが確認される（ステップｌ）。ＲＥＣポーズ状
態であると、振れ検出センサ１０からの出力信号が所定
値以上となったか確認され（ステップ２）、所定値以上
であると可変頂角プリズムｌが作動される（ステップ３
）。次に、ＲＦＣ状態であるかが確認され（ステップ４
）、ＲＥＣ状態であると可変頂角プリズムＩを作動させ
た防振機能動作録画状態となる。また、ＲＥＣ状態でな
い場合はＲＥＣポーズ状態であるかが確認され（ステッ
プ５）、ＲＥＣポーズ状態であるとステップ２に戻る。First, as shown in FIG. 3, if the video camera is in full auto mode, it is checked whether the video camera is in the REC Bose state (step 1). In the REC pause state, it is checked whether the output signal from the shake detection sensor 10 is equal to or greater than a predetermined value (step 2), and if it is equal to or greater than the predetermined value, the variable apex angle prism l is activated (step 3).
). Next, the RFC status is checked (step 4).
), when the camera is in the REC state, the camera enters a state where the variable apex angle prism I is operated to record the operation of the anti-vibration function. If it is not in the REC state, it is checked whether it is in the REC pause state (step 5), and if it is in the REC pause state, the process returns to step 2.
また、ＲＥＣポーズ状態でない場合は所定の時定数に基
づいて光軸を偏心させている可変頂角プリズム１の透明
板２１ａの傾動位置を、各透明板２１ａ、２１ｂが平行
となるセンタリング位置に序々に復帰させてセンタリン
グを行い（ステップ６）、センタリングが終了すると防
振機能をＯＦＦとする（ステップ７）。In addition, when the REC pause state is not in progress, the tilting position of the transparent plate 21a of the variable apex angle prism 1, whose optical axis is decentered based on a predetermined time constant, is gradually moved to the centering position where the transparent plates 21a and 21b are parallel to each other. When the centering is completed, the anti-vibration function is turned off (step 7).
一方、ステップ２において、振れ検出センサｌＯからの
出力信号が所定値以下である場合は、可変頂角プリズム
ｌの傾動位置が一時保持され（ステップ８）、次いで可
変頂角プリズム１の透明板２１ａの傾動位置がセンター
から所定値以上ずれているかが確認され（ステップ９）
、ずれている場合は所定の時定数に基づいて、光軸を偏
心させている可変頂角プリズム１の透明板２１ａの傾動
位置を、各透明板２１ａ、２１ｂが平行となるセンタリ
ング位置に序々に復帰させてセンタリングを行い（ステ
ップＩＯ）、センタリングが終了するとステップ１に戻
る。On the other hand, in step 2, if the output signal from the shake detection sensor lO is below the predetermined value, the tilted position of the variable apex prism l is temporarily held (step 8), and then the transparent plate 21a of the variable apex angle prism 1 is held. It is confirmed whether the tilting position of is deviated from the center by more than a predetermined value (step 9).
, if the optical axis is eccentric, the tilting position of the transparent plate 21a of the variable apex angle prism 1 is gradually adjusted to a centering position where the transparent plates 21a and 21b are parallel to each other based on a predetermined time constant. It returns and performs centering (step IO), and when the centering is completed, it returns to step 1.
したがって、ビデオカメラのフルオートモードの場合、
撮像光学系からの光学像がビューファインダであるモニ
タ７に出力されているＲＥＣポーズ状態でビデオカメラ
本体がたとえば手振れなどにより所定値以上振れた場合
、自動的に防振機能作動状態となり、また、たとえば手
振れがなくなった時等の防振機能不要状態になると、−
旦、可変頂角プリズムｌの透明板２１ａの傾動位置が保
持され、次いで序々にセンタリング動作が行われる。こ
れにより、防振機能の動作時と非動作時の切換状態が発
生しても、ビューファインダーであるモニタ７からの映
像は急激に光軸が変化することがなく序々に可変頂角ブ
７ノズムｌのセンタリング動作が行われるので、撮影者
に違和感を与えることがない。Therefore, if the camcorder is in full auto mode,
If the video camera body shakes by more than a predetermined value due to hand shake or the like in the REC pause state where the optical image from the imaging optical system is output to the monitor 7 serving as a viewfinder, the anti-shake function automatically enters the activation state. For example, when the anti-vibration function becomes unnecessary, such as when camera shake disappears, -
First, the tilted position of the transparent plate 21a of the variable apex angle prism l is maintained, and then the centering operation is performed gradually. As a result, even if the image stabilization function is switched between operating and non-operating, the image from the viewfinder monitor 7 will not change its optical axis suddenly and will gradually change to the variable apex angle block 7. Since the centering operation of 1 is performed, the photographer does not feel uncomfortable.
次に、防振機能のマニュアルモードの場合について第４
図のフローチャートを用いて説明する。Next, let's look at the fourth section regarding the manual mode of the anti-vibration function.
This will be explained using the flowchart shown in the figure.
同図に示すように、まず、防振機能が選択されたか否か
が確認され（ステップｌｌ）、防振モードが選択される
と、ＲＥＣポーズ状態であるか否かが確認される（ステ
ップ１２）。ＲＥＣポーズ状態であると防振機能動作状
態となる（ステップ１３）。次いで、防振機能ＯＦＦ状
態になったか否かが確認され（ステップｌ ４） 、Ｏ
ＦＦ状態であるとＲＥＣ中であるか否かが確認される（
ステップ１５）。ＲＥＣ中であると可変頂角プリズム１
の透明板２１ａの傾動位置が磁気回路２４の駆動により
一時保持される（ステップ１６）。この後、ＲＥＣボー
ズ状態であるか否かが確認され（ステップ１７） 、Ｒ
ＦＣポーズ状態でなくなると可変頂角プリズム１の透明
板２１ａの傾動位置がセンターから所定値以上ずれてい
るかが確認され（ステップＩ８）、ずれている場合は所
定の時定数に基づいて、光軸を偏心させている可変頂角
プリズム１の透明板２１ａの傾動位置を、各透明板２１
ａ。As shown in the figure, first, it is checked whether the anti-shake function is selected (step 11), and when the anti-shake mode is selected, it is checked whether the REC pause state is selected (step 12). ). When the camera is in the REC pause state, the anti-vibration function is activated (step 13). Next, it is checked whether the anti-vibration function has been turned off (step l4), and O
If it is in the FF state, it is checked whether or not it is being recorded (
Step 15). During REC, variable apex prism 1
The tilted position of the transparent plate 21a is temporarily held by driving the magnetic circuit 24 (step 16). After this, it is confirmed whether or not the REC is in the Bose state (step 17), and R
When the FC pose state is no longer present, it is confirmed whether the tilted position of the transparent plate 21a of the variable apex angle prism 1 deviates from the center by a predetermined value or more (step I8), and if it deviates from the center, the optical axis is adjusted based on a predetermined time constant. The tilting position of the transparent plate 21a of the variable apex angle prism 1 is
a.
２１ｂが平行となるセンタリング位置に序々に復帰させ
てセンタリングを行う（ステップ１９）。Centering is performed by gradually returning to the centering position where 21b becomes parallel (step 19).
したがって、防振機能のマニュアルモードの場合も、防
振機能の動作時と非動作時の切換状態が発生しても、ビ
ューファインダーであるモニタ７からの映像は急激に光
軸が変化することがなく序々に可変頂角プリズム１のセ
ンタリング動作が行われるので、撮影者に違和感を与え
ることがない。Therefore, even in the manual mode of the anti-shake function, even if the anti-shake function switches between operating and non-operating, the optical axis of the image from the monitor 7, which is the viewfinder, may change suddenly. Since the centering operation of the variable apex angle prism 1 is performed in a step-by-step manner, the photographer does not feel uncomfortable.
このように上述の実施例では、手振れによる像振れを有
効に補正することができ、しがも防振機能である像振れ
補正機能の動作状態、非動作状態の切り換え動作が行わ
れてもファインダーであるモニタの像が不連続となるこ
とが有効に防止される。In this way, in the above-described embodiment, it is possible to effectively correct image blur caused by camera shake, and even when the image stabilization function, which is an image stabilization function, is switched between the operating state and the non-operating state, the viewfinder remains unchanged. This effectively prevents the monitor image from becoming discontinuous.
なお、上述した実施例では、ＣＣＤ５から出力された映
像信号中から被写体像のボケ幅を検出しこのボケ幅が小
さくなる性質を利用して合焦検出を行ういわゆるＴＶ−
ＡＦを用いた例について説明したが、発光、受光素子か
らなるアクティブＡＦであっても本実施例を適用するこ
とが可能である。In the above-mentioned embodiment, the blur width of the subject image is detected from the video signal output from the CCD 5, and focus detection is performed using the property that the blur width becomes smaller.
Although an example using AF has been described, the present embodiment can also be applied to an active AF consisting of a light emitting and light receiving element.
また、上述した実施例では像振れ補正機構を撮像装置で
あるビデオカメラに一体に設けた例について説明したが
、可変頂角プリズム、振れ検出センサ、ＶＡＰ駆動回路
および制御回路を別体に構成しビデオカメラ本体に着脱
自在としたアダプタとしてもよ（、さらに、制御回路を
ビデオカメラ本体側と兼用とする構成にしてもよい。Further, in the above-described embodiment, an example was explained in which the image stabilization mechanism was integrated into a video camera, which is an imaging device. It may be an adapter that is detachably attached to the video camera body (furthermore, the control circuit may also be used for the video camera body side).
［発明の効果］
以上説明したように本発明の撮像装置では像振れ補正を
有効に行うことができ、しかも像振れ補正を動作させた
録画動作中に、像振れ補正を非動作状態とさせてもファ
インダーであるモニタ画像の不連続の発生を有効に防止
することができる。[Effects of the Invention] As explained above, the image pickup apparatus of the present invention can effectively perform image stabilization, and moreover, the image stabilization can be made inactive during a recording operation in which image stabilization is activated. It is also possible to effectively prevent the occurrence of discontinuity in the viewfinder monitor image.
第１図は本発明の一実施例の撮像装置の構成を示すブロ
ック図、第２図は第１図の可変頂角プリズム、振れ検出
センサおよびＶＡＰ駆動回路の詳細を説明するためのブ
ロック図、第３図および第４図はそれぞれ制御回路の動
作を説明するためのフローチャートである。
■・・・可変頂角プリズム、２・撮像光学系、５・・Ｃ
ＣＤ、７・・・モニタ、９・・・制御回路、１０・・・
振れ検出センサ、１１・＝ＶＡＰ駆動回路、２１ａ、２
１ｂ・・・透明板、２４・・・磁気回路。FIG. 1 is a block diagram showing the configuration of an imaging device according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating details of the variable apex angle prism, shake detection sensor, and VAP drive circuit shown in FIG. 1. FIGS. 3 and 4 are flowcharts for explaining the operation of the control circuit, respectively. ■...Variable apex angle prism, 2. Imaging optical system, 5...C
CD, 7...Monitor, 9...Control circuit, 10...
Shake detection sensor, 11・=VAP drive circuit, 21a, 2
1b...Transparent plate, 24...Magnetic circuit.
Claims (2)
手段と、 この撮像手段からの画像電気信号の少なくとも記録を行
なう記録手段と、 撮像装置本体の振れ量を検出する振れ検出手段と、 前記撮像手段の前記結像面上の所定の位置に前記光学像
を一致させるよう光軸を偏心させるための光軸偏心手段
と、 前記振れ検出手段からの検出出力に基づいて前記光軸偏
心手段の偏心量を駆動制御する駆動制御手段と、 前記記録手段の動作中、前記光軸偏心手段による光軸偏
心駆動が停止されたとき、（このときの）光軸偏心手段
の光軸偏心位置を保持するよう制御する制御手段と、 を具備することを特徴とする撮像装置。(1) An imaging device that converts an optical image on an imaging plane into an electrical image signal, a recording device that records at least the electrical image signal from the imaging device, and a shake detection device that detects the amount of shake of the imaging device body. and an optical axis decentering means for decentering the optical axis so that the optical image coincides with a predetermined position on the image forming surface of the imaging means; a drive control means for driving and controlling the amount of eccentricity of the eccentricity means; and when the optical axis eccentricity driving by the optical axis eccentricity means is stopped during the operation of the recording means, the optical axis eccentricity of the optical axis eccentricity means (at this time) is controlled; An imaging device comprising: a control means for controlling the position to be maintained;
と、前記光軸偏心手段における光軸偏心位置の保持を解
除することを特徴とする撮像装置。(2) The imaging apparatus according to claim 1, wherein the control means releases the optical axis eccentric position held by the optical axis eccentricity means when the recording operation of the recording means is stopped. Device.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2161905A JP2791190B2 (en) | 1990-06-19 | 1990-06-19 | Imaging device and image blur correction device |
| US08/380,336 US6014169A (en) | 1990-06-19 | 1995-01-30 | Pickup device apparatus including vibration correction means |
| US10/698,367 US7388604B2 (en) | 1990-06-19 | 2003-11-03 | Image pickup device and apparatus including vibration correction means |
| US12/032,283 US20080136925A1 (en) | 1990-06-19 | 2008-02-15 | Image pickup apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2161905A JP2791190B2 (en) | 1990-06-19 | 1990-06-19 | Imaging device and image blur correction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0451677A true JPH0451677A (en) | 1992-02-20 |
| JP2791190B2 JP2791190B2 (en) | 1998-08-27 |
Family
ID=15744252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2161905A Expired - Fee Related JP2791190B2 (en) | 1990-06-19 | 1990-06-19 | Imaging device and image blur correction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2791190B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011139168A (en) * | 2009-12-25 | 2011-07-14 | Canon Inc | Image capturing apparatus and means for controlling the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0275284A (en) * | 1988-09-09 | 1990-03-14 | Canon Inc | Image pickup device |
-
1990
- 1990-06-19 JP JP2161905A patent/JP2791190B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0275284A (en) * | 1988-09-09 | 1990-03-14 | Canon Inc | Image pickup device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011139168A (en) * | 2009-12-25 | 2011-07-14 | Canon Inc | Image capturing apparatus and means for controlling the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2791190B2 (en) | 1998-08-27 |
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