JP2015102669A5

JP2015102669A5 -

Info

Publication number: JP2015102669A5
Application number: JP2013242957A
Authority: JP
Filing date: 2013-11-25
Publication date: 2016-12-28
Anticipated expiration: 2033-11-25

Description

上記課題を解決するために、本発明に係る装置は、像振れを複数の補正手段により補正する像振れ補正装置であって、振れ検出手段によって検出された振れ検出信号を取得して前記複数の補正手段の目標位置を算出する算出手段と、前記複数の補正手段の位置を検出する位置検出手段と、前記位置検出手段によって検出された前記複数の補正手段の位置を、前記算出手段が算出した目標位置に制御する複数の制御手段と、前記複数の補正手段への外乱をそれぞれ演算する複数の外乱推定手段と、前記複数の制御手段の出力から、前記複数の外乱推定手段の出力をそれぞれ減算することにより、前記複数の制御手段に対する外乱補償を行う複数の外乱補償手段と、を備える。 In order to solve the above problems, the device according to the present invention, there is provided a image blur correction apparatus for correcting a plurality of correction means image blur, vibration is the plurality acquires the detected vibration detection signal by the detecting means The calculation means calculates the target position of the correction means, the position detection means for detecting the positions of the plurality of correction means, and the positions of the plurality of correction means detected by the position detection means. A plurality of control means for controlling the target position, a plurality of disturbance estimation means for calculating disturbances to the plurality of correction means, and outputs of the plurality of disturbance estimation means from outputs of the plurality of control means, respectively. A plurality of disturbance compensation means for performing disturbance compensation on the plurality of control means by subtraction.

Claims

An image shake correction apparatus that corrects image shake by a plurality of correction means ,
A calculating means for calculating a target position of the plurality of correction means acquires the detected vibration detection signal by vibration is detection means,
Position detecting means for detecting positions of the plurality of correcting means;
A plurality of control means for controlling the positions of the plurality of correction means detected by the position detection means to the target positions calculated by the calculation means;
A plurality of disturbance estimation means for respectively calculating disturbances to the plurality of correction means;
A plurality of disturbance compensation units that perform disturbance compensation for the plurality of control units by subtracting the outputs of the plurality of disturbance estimation units from the outputs of the plurality of control units, respectively. Correction device.

A first optical member and a second optical member as the plurality of correcting means;
The first control means performs feedback control for converging the position of the first optical member detected by the position detection means to the target position calculated by the calculation means,
2. The image according to claim 1, wherein the second control unit performs feedback control for converging the position of the second optical member detected by the position detection unit to the target position calculated by the calculation unit. Shake correction device.

First disturbance estimation means provided for the first control means;
Second disturbance estimation means provided for the second control means;
3. A gain adjusting means for changing the gain by comparing the first calculation data as the output of the first disturbance estimation means and the second calculation data as the output of the second disturbance estimation means. The image blur correction device according to 1.

Limiter means for determining the estimation accuracy of the first and second disturbance estimation means;
Towards the second disturbance estimating means, when from the estimation accuracy is higher the first disturbance estimating means, with respect to the first operation data by the first disturbance estimating means, the lower bit more than the threshold determined by the limiter means Mask means for masking;
4. The image blur correction apparatus according to claim 3, further comprising addition means for adding a lower-order bit signal equal to or lower than the threshold in the second calculation data by the second disturbance estimation means to an output of the mask means. 5.

Of the plurality of disturbance compensation means, the first disturbance compensation means is:
First gain means whose gain coefficient is changed by the gain adjusting means;
First subtracting means for subtracting the output of the first gain means from the output of the first control means;
The second disturbance compensation means is
Second gain means whose gain coefficient is changed by the gain adjusting means;
A second subtracting means for subtracting the output of the second gain means from the output of the second control means;
The first gain means multiplies the output of the addition means by a gain coefficient and outputs the result to the first subtraction means, and the second gain means multiplies the output of the second disturbance estimation means by a gain coefficient. The image blur correction apparatus according to claim 4, wherein the image blur correction apparatus outputs the second subtraction means.

An optical apparatus comprising the image blur correction device according to claim 1.

An image blur correction device according to any one of claims 1 to 5,
An imaging optical system and an imaging device,
An image pickup apparatus, wherein image shake of an image picked up by the image pickup device is corrected by the plurality of correction means.

Driving means for performing zoom driving of the imaging optical system;
The imaging apparatus according to claim 7, further comprising: a limiter changing unit that acquires position detection information related to the zoom driving and changes a threshold value of a limiter unit that determines an estimation accuracy of the disturbance estimation unit.

A control method executed by an image shake correction apparatus that corrects image shake by a plurality of correction means ,
A calculation step of vibration is the calculated means a target position of said plurality of correction means to obtain detected vibration detection signal by the detecting means calculates,
A position detecting step of detecting positions of the plurality of correcting means by a position detecting means;
A control step of controlling the positions of the plurality of correction means detected by the position detection means to the target positions calculated in the calculation step using a plurality of control means,
Wherein the control step includes a calculation step for each calculating the disturbance to the plurality of correction means by a plurality of disturbance estimating means from the output of said plurality of control means, by subtracting the output of said plurality of disturbance estimating means respectively A control method for an image blur correction apparatus, comprising a disturbance compensation step for performing disturbance compensation for each of the plurality of control means.