JP2012008468A5 - - Google Patents

Description

In order to achieve the above object, the present invention provides a zoom unit that performs an optical scaling operation by moving a zoom lens according to a zoom operation of a photographer, and a shake detection unit that detects a shake applied to an optical device. , an image shake correcting means for reducing the shaking of an image caused by the shake, and calculation detecting means that to calculate the movement target position of the image shake correcting means based on a detection result of the shake detecting means,
A disturbance estimating means for estimating the magnitude of the disturbance at the time of driving of the zooming unit, the larger the disturbance vibration estimation value indicating the magnitude of the disturbance estimated by the disturbance estimating means, the follow-up property before Kizo shake correction characterized in that it comprises a characteristic changing means to change the characteristics of the calculation unit so as to decrease.

According to the present invention, it is possible to accurately detect shake of an optical device in accordance with the magnitude of disturbance such as vibration or magnetic noise caused by driving of a zoom motor or the like, and to prevent a reduction in correction effect due to excessive correction operation. be able to.

It is a block which shows schematic structure of the optical instrument which concerns on embodiment of this invention. It is a block diagram which shows schematic structure of the anti-vibration control part in the 1st Embodiment of this invention. It is a flowchart which shows the flow of the image stabilization control operation | movement in the image stabilization control part of FIG. It is a block diagram which shows the outline of the control system of a shift lens position control part and a lens disturbance estimation part. (A) is a signal waveform of the estimated vibration acceleration, (b) is a waveform of a signal obtained by converting the vibration acceleration into an absolute value, and (c) is a waveform of the disturbance d estimated by adding an LPF. (A) is a diagram showing the relationship between the filter cutoff frequency and the predetermined threshold α, (b) is a diagram showing the relationship of the predetermined threshold α with respect to disturbance vibration during zooming, and (c) is the filter cutoff frequency fc. It is a figure which shows the change of the waveform of the disturbance vibration at the time of zoom at the time of applying. It is a block diagram which shows schematic structure of the image stabilization control part in the 2nd Embodiment of this invention. It is a block diagram which shows schematic structure of the anti-vibration control part in the 3rd Embodiment of this invention. It is a block diagram which shows schematic structure of the anti-vibration control part in the 4th Embodiment of this invention. It is a block diagram which shows schematic structure of the anti-vibration control part in the 5th Embodiment of this invention.

Claims (9)

Zoom means for performing an optical scaling operation by moving a zoom lens according to a zoom operation of a photographer;
Shake detection means for detecting shake applied to the optical device;
Image shake correction means for reducing image shake caused by the shake;
A calculation detecting means that to calculate the movement target position of the image shake correcting means based on a detection result of the shake detecting means,
Disturbance estimation means for estimating the magnitude of disturbance during driving of the zoom means;
The disturbance disturbance vibration estimate increases indicating the size of the disturbance estimated by the estimating means, be provided with a characteristic changing means to change the characteristics of the calculation means to reduce the followability of the prior Kizo shake correction Optical equipment characterized by. The calculation means includes a filter capable of changing a cutoff frequency,
  The characteristic changing unit increases the cutoff frequency of a filter included in the calculating unit as the estimated disturbance vibration value indicating the magnitude of the disturbance estimated by the disturbance estimating unit increases. The optical instrument described. The disturbance estimating means, optical apparatus according to claim 1 or 2, characterized in that estimating the force disturbance applied to the image shake correcting means sets the estimated force disturbance as the disturbance vibration estimate. The disturbance estimating means, optical apparatus according to claim 1 or 2, wherein the estimating the force disturbance applied to the motor of the zoom means, sets the estimated force disturbance as the disturbance vibration estimate. The disturbance estimating means, optical apparatus according to claim 1 or 2, characterized in that calculating the disturbance vibration estimate using the output signal of the shake detecting means. Further comprising a zoom position detection means to detect the position of the zoom lens,
The disturbance estimating means, by setting the relationship to these the disturbance vibration estimate of the magnitude of the disturbance at the time of driving of the detected zoom position previously and stored the zoom speed the zoom means by said zoom position detecting means The optical apparatus according to claim 1 or 2 . The optical apparatus according to claim 6, wherein further comprising a benzalkonium zoom speed calculation means to calculate the zoom speed from the detection result by the previous SL zoom position detecting means. Motion vector calculating means for calculating a motion vector from image information captured from the imaging means;
Zoom position detecting means for detecting the position of the zoom lens;
Zoom speed calculating means for calculating the zoom speed from the detection result by the zoom position detecting means;
Motion vector predicting means for predicting a motion vector during driving of the zoom means from the zoom position detected by the zoom position detecting means and the zoom speed calculated by the zoom speed calculating means;
The disturbance estimation unit sets the disturbance vibration estimation value based on a magnitude of a difference between a motion vector calculation value by the motion vector calculation unit and a motion vector prediction value by the motion vector prediction unit. The optical apparatus according to claim 7 . A zoom unit that performs an optical scaling operation by moving a zoom lens according to a zoom operation of a photographer, a shake detection unit that detects a shake applied to an optical device, and reduces image shake caused by the shake a control method for an optical apparatus comprising an image shake correcting means, and calculating means for calculating a movement target position of the image shake correcting means based on the detection result by the previous SL shake detecting means,
A disturbance estimation step of estimating the magnitude of disturbance during driving of the zoom means;
And a said disturbance estimation larger the disturbance vibration estimation value indicating the magnitude of the disturbance to be estimated in step, before Kizo shaking characteristic changing step to change the characteristics of the calculation means to reduce the followability of correction A method for controlling an optical apparatus.