JPH0723275A - Deflection correction photographing device - Google Patents

Abstract

PURPOSE:To always perform an optimum deflection correction by providing a first control means driving a correction means in the direction correcting the motion of an image and a second control means controlling the characteristic of the first control means based on the output of a frequency decision means. CONSTITUTION:A phase and gain control circuit 11 corrects the output of the integration signal outputted from an integration circuit 5 or the phase and gain of an angular displacement signal. A photographing state decision circuit 12 performs the decision of the photographing state of a pan and tilt, etc., from an angular velocity signal and the angular displacement signal and controls the characteristics of an HPF 10 and the phase and gain correction circuit 11 according to the photographing state. A frequency detection means 13 detects the vibration added to this device from the angular velocity signal outputted from an A/D converter 4 and controls the characteristic of the phase and gain correction circuit 11 according to the vibration frequency. Thus, even when various kinds of frequencies are mixed, a correction can be performed for the main components of a deflection frequency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shake correction device suitable for use in cameras and the like.

[0002]

2. Description of the Related Art Conventionally, in the field of a shake correction photographing device such as a camera, automation in all aspects such as exposure setting and focus adjustment,
It has multiple functions, and good shooting can be done easily.

However, it is often the camera shake that actually deteriorates the quality of the shot image, and in recent years, various shake correction shooting apparatuses for correcting this camera shake have been proposed and are attracting attention. .

FIG. 13 shows an example of the configuration of a conventional shake correction photographing apparatus.

In FIG. 1, reference numeral 1 denotes an angular velocity detector including an angular velocity sensor such as a vibration gyro, which is attached to a shake correction photographing device such as a camera. Reference numeral 2 is a DC cut filter that blocks the DC component of the velocity signal output from the angular velocity detector 1 and passes only the AC component, that is, the vibration component. As the DC cut filter, a high pass filter (hereinafter referred to as HPF) that cuts off a signal in an arbitrary band may be used. An amplifier 3 amplifies the angular velocity signal output from the DC cut filter to an appropriate sensitivity.

Reference numeral 4 is an A / D converter for converting the angular velocity signal output from the amplifier 3 into a digital signal, and 5 is an integrator for integrating the output of the A / D converter 4 and outputting an angular displacement signal, 6
Is a pan / tilt determination circuit that determines the panning / tilting from the integrated signal of the angular velocity signals output from the integrator circuit 5, that is, the angular displacement signal, and 7 is the output of the pan / tilt determination circuit that is an analog signal or a pulse such as PWM. It is a D / A converter that converts to an output and outputs. And A / D
Converter 4, integrator 5, pan / tilt determination circuit 6, D / A
The converter 7 is composed of, for example, a microcomputer (hereinafter referred to as a microcomputer) COM1. Reference numeral 8 is a drive circuit for driving the image correcting means in the subsequent stage so as to suppress the shake based on the displacement signal output from the microcomputer, and 9 is an image correcting means, for example, displacing the optical optical axis to cancel the shake. An optical correction unit or an electronic correction unit that electronically shifts an image reading position from a memory storing an image to offset the shake is used.

[0007]

However, the above-described shake correction photographing apparatus has the following problems.

That is, when various frequencies are mixed, the conventional method cannot correct the main component of the shake frequency, so that, for example, small high frequency components can be corrected, but low frequency shake does not occur. There is a problem that the image cannot be corrected and it appears on the screen, and the anti-vibration effect cannot be felt.

[0009]

In order to solve the above-mentioned problems, according to the shake correction photographing apparatus of the present invention, a detecting means for detecting the vibration of the device and a correcting means for correcting the movement of the image due to the vibration. And first control means for controlling the correction means based on the output of the detection means to drive the correction means in a direction for correcting the movement of the image, and detecting the frequency of the output signal of the detection means. A configuration including frequency determining means and second controlling means for controlling the characteristic of the first controlling means based on the output of the frequency determining means is used.

[0010]

As a result, even when various frequencies are mixed, the main component of the shake frequency can be corrected, so that optimum shake correction can always be performed.

[0011]

Embodiments of the present invention will be described in detail below with reference to the drawings.

<< First Embodiment >> FIG. 1 is a block diagram showing the arrangement of a first embodiment of a shake correction photographing apparatus according to the present invention.

In the figure, the same components as those of the preceding example shown in FIG. 13 are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, an angular velocity detecting means 1 including an angular velocity sensor such as a vibration gyro attached to a shake correction photographing device such as a camera, and a DC cut filter for cutting off a DC component of a velocity signal output from the angular velocity detecting means 1. (Or HPF), the amplifier 3 for amplifying the angular velocity signal to a predetermined sensitivity, the drive circuit 8, and the image correction means 9 can have the same configurations as those of the preceding example shown in FIG. The difference in the invention is the internal configuration of the microcomputer COM2 that controls the entire apparatus.

In this embodiment, the image correction means 9
For example, a variable apex prism (VAP), which will be described later, or a memory control system that corrects a blur by shifting an image on a memory is used.

Looking at the configuration inside the microcomputer COM2, A /
The D converter 4 converts the angular velocity signal output from the amplifier 3 into a digital signal, the high-pass filter HPF 10 has a function of changing the characteristics in an arbitrary band, and the integrating circuit 5 has an H level.
The signal of the predetermined frequency component extracted by the PF 10 is integrated to obtain the angular displacement signal in the frequency component, and the phase / gain correction circuit 11 outputs the integrated signal output from the integration circuit 5, that is, the phase and gain of the angular displacement signal. Then, the shooting state determination circuit 12 determines the shooting state such as pan / tilt from the angular velocity signal and the angular displacement signal, and the HPF 10
Further, the characteristics of the phase and gain correction circuit 11 are controlled according to the photographing condition, the frequency judging means 13 judges the frequency in the photographing condition, and the D / A converter 7 outputs the phase and gain correcting circuit 11. Signal is analog signal or P
It is converted into a pulse output such as WM and output.

Numeral 12 determines the panning, tilting and photographing state from the angular velocity signal output from the A / D converter 3 and the displacement signal output from the integrating circuit 5.
It is a pan / tilt determination circuit that changes the characteristics of the HPF according to the discrimination result.

The specific operation of this pan / tilt determination is A
When the presence or absence of vibration of the angular velocity signal output from the D / D converter 4 and the angular displacement signal output from the integrating circuit 5 are input, and the angular velocity is constant and the angular displacement signal obtained by integrating the angular velocity signal indicates a monotonous increase. , Panning or tilting is determined, and in such a case, the low-frequency cutoff frequency of the HPF 10 is changed to a higher frequency, and the characteristic is changed so that the shake correction system does not respond to the low-frequency. Is.

When panning / tilting is detected, the VAP is gradually centered on the center of the moving range. During this time, the angular velocity signal and the angular displacement signal are detected, and when the panning / tilting is completed, the cutoff frequency in the low frequency range is lowered again to expand the shake correction range.

Reference numeral 13 is frequency detecting means for detecting the vibration applied to the device from the angular velocity signal output from the A / D converter 3 and controlling the characteristics of the transfer and gain correction circuit 11 according to the vibration frequency. .

Here, the drive circuit 8 and the image correction means 9 for actually correcting the shake of the image in accordance with the control signal output from the microcomputer COM2 will be described with reference to examples.
For example, the ones shown in FIGS.

FIG. 4 shows a variable apex angle prism (hereinafter VAP:
Varriable angle prisum) 306 and a voice coil as a drive system, and a closed loop control system that controls the drive amount by encoder-detecting angular displacement and feedback to the drive system. Is.

First, the VAP will be described in detail. As shown in FIG. 8, the variable apex angle prism 306 has a transparent high refractive index (refractive index n) between two opposing transparent parallel plates 340a and 340b. A transparent parallel plate 340 is filled with an elastic body or an inert liquid 342 in a sandwiched manner, and the outer periphery thereof is elastically sealed with a sealing material 341 such as a resin film.
a and 340b are swingable, and the optical axes are displaced by swinging the transparent parallel plates 340a and 340b to correct shake.

FIG. 9 shows the passing state of the incident light beam 344 when one transparent parallel plate 340a of the variable apex angle prism 306 of FIG. 8 is rotated about the swing axis 301 (311) by an angle σ. The optical axis 34 is shown in FIG.
The light flux 344 that has entered along 3 is deflected by the angle φ = (n−1) σ and emitted according to the same principle as the wedge prism. That is, the optical axis 343 is decentered (deflected) by the angle φ.

Returning to the description of FIG. 4, the VAP described above is explained.
306 is fixed to the lens barrel 302 via a holding frame 307 so as to be rotatable around 301 and 311.

313 is a yoke, 315 is a magnet, 3
Reference numeral 12 denotes a coil, which constitutes a voice coil type actuator capable of varying the apex angle of VAP around 311 by passing a current through the coil 312. 31
Reference numeral 0 is a slit for detecting the displacement of the VAP, which is a rotary shaft 31.
The position is displaced by rotating together with the holding frame 307, that is, the VAP 306 coaxially with 1. 308 is a slit 310
Is a light emitting diode that detects the position of the
sition Sensing Detector) and light emitting diode 3
By detecting the displacement of the slit 310 together with 08, an encoder for detecting the angular displacement of the VAP apex angle is configured.

Then, the luminous flux whose incident angle is changed by the VAP 306 is CC by the photographing lens unit 303.
An image is formed on the image pickup surface of the image pickup element 304 such as D.

Reference numeral 305 indicates the center of the other rotation axis orthogonal to the rotation axis composed of the shafts 301 and 311 of the holding frame 307.

Next, the basic structure and operation of the control circuit for driving and controlling the VAP will be described with reference to the block diagram of FIG.

In the figure, 306 is a VAP, 322 is an amplifier, 323 is a driver for driving an actuator, 324 is a voice coil type actuator for driving the VAP 306 described above, 326 is an encoder for detecting the vertical angle displacement of VAP, 325. Is a micro computer CO
A shake correction control signal 320 output from M2 and an output signal of the angular displacement encoder 326 are added with opposite polarities, and the shake correction control signal 320 output from the micro computer COM2 and the angular displacement encoder. Three
Since the control system operates so as to be equal to the output signal of the V.26, the VAP 306 is driven so that the control signal 320 is equal to the output of the encoder 326 as a result, and the VAP is moved to the position designated by the microcomputer COM2. Is controlled.

FIG. 6 shows another example of the image correcting means, which is constructed such that the above VAP is driven not by a voice coil type actuator but by a stepping motor.

This is about the rotary shaft 301 as the center of rotation.
The stepping motor 401 drives the VAP via the holding frame 307. That is, a stepping motor 401 having a lead screw 401a arranged on its rotation axis is attached to a support frame 403 attached to the lens barrel 302, and the guide frame 405 of the support frame 403 allows the stepping motor 401 to move in the optical axis direction. The guided motor 404 is constantly meshed with the lead screw 401a, and the carrier 404 is rotatably connected to the connecting rod 407 fixed to the support frame 307 by the rotating shaft 406. Is rotated to move the carrier 404 in the optical axis direction, and the holding frame is rotated about the rotating shafts 301 and 311 via the connecting rod 407.
It drives P. Reference numeral 402 is a reset sensor for detecting the VAP reference position. A VAP drive mechanism similar to this is also provided for the shaft 305, but description thereof will be omitted.

The circuit configuration for driving and controlling the system of FIG. 6 is as shown in the block diagram of FIG.

In FIG. 7, the micro computer CO
The drive arithmetic circuit 4 outputs the control signal 320 output from M2.
Drive calculation is performed in 10 to convert into a drive signal of VAP,
It outputs to the driver / IC411. Then, the stepping motor 401 is driven by the driver IC to change the apex angle of VAP.

FIG. 10 shows a third example of the image blur correction means, which stores image information in the memory and sets the cut-out range of the image from the memory to be smaller than the stored image. It is configured to correct the shake by shifting the position where the image is cut out from the memory in a direction that cancels the movement of the image, and further expands the cut out image signal to correct the screen size before outputting. 2 illustrates a memory control type image shake correction means. This system is characterized in that shake correction can be performed electronically without using an optical correction mechanism such as VAP.

In the figure, 100 is a zoom lens, and 1
01 is an image pickup device (CCD image sensor or the like) for converting an optical image into an electric signal, 102 is an A / D converter, and 103 is
Control signal (runout signal) input from the microcomputer COM2
Based on 110, a shake correction process for correcting the shake of the image by shifting the cut-out position of the predetermined image information from the field memory 106 so as to reduce the shake component in the image pickup signal, and enlarging the read image from the field memory 106. This is an image processing circuit that constitutes a view angle correction processing unit that performs processing to perform so-called electronic zooming and converts it into a normal screen size, and is realized by a microcomputer.

Reference numeral 104 is an interpolation process for interpolating one pixel signal from image information of two or more adjacent pixels by zoom information when performing electronic zoom for correcting an image read from the field memory to a normal angle of view. It is a means.
For this interpolation method, well-known means may be used,
For example, the average value between adjacent pixels may be used to interpolate between pixels. Further, 105 is a D / A converter, and 107 is an encoder for detecting the zoom magnification ratio of the zoom lens 100.

Next, the operation will be described. Zoom lens 10
The optical image that has passed 0 is converted into an electrical signal by the image sensor 101 and output as an image signal. The image pickup signal is converted into a digital signal by the A / D converter 102, and the image information for one field is written in the memory 106 via the memory control unit 103. Here, the cut-out position of the image signal from the field memory 106, that is, the read range and its read position are determined by the shake signal input from the microcomputer COM2 and the zoom information from the encoder 107.

Next, in order to convert the signal read from the field memory 106 into the original size of the scanning width of the output image, that is, the angle of view, according to the cutout size, the number of pixels in the normal one pixel output period is increased. Whether or not to output is determined, and the interpolation processing circuit 104 performs the interpolation processing on the pixel having no pixel information. Then, this signal is converted into an analog signal by the D / A converter 105 and output.

The specific examples of the image correction means for correcting the shake have been described above.

Next, the processing operation of the microcomputer COM2 in this embodiment shown in FIG. 1 will be described with reference to the flow chart of FIG. In the figure, when control is started, in step S201, the DC signal is removed via the DC cut filter 2 and the amplifier 3, and the angular velocity signal from the angular velocity detecting means 1 amplified to a predetermined level is A / D converted. It is converted into a digital signal by the device 4 and taken into the microcomputer COM2.

Subsequently, in step S202, the panning / tilting and photographing states are performed by the angular displacement signal and the angular displacement signal obtained by integrating the predetermined high frequency component extracted from the angular velocity signal by the HPF 10 by the integrating circuit 5. Make a decision.

In step S203, the coefficient for setting the characteristic of the HPF 10 is read out from a table (not shown) prepared in advance in the microcomputer COM2 according to the determination result. That is, if the HPF 10 is configured by a digital filter, the characteristics of the HPF 10 can be freely changed by reading and setting a predetermined coefficient from a table storing the coefficient. The coefficients according to these panning / tilting and shooting conditions are empirically determined.

In step S204, the HPF 10 is calculated using the characteristic setting coefficient to set the characteristic, and in step S205, the signal output from the HPF 10 is integrated by the integrating circuit 5 to obtain the angular displacement signal ( Shake signal).

In step S206, the frequency detecting means 1
3, the angular velocity signal output from the A / D converter 4 is calculated to detect the center frequency of the shake, and step S2
At 07, the correction coefficient of the transfer and gain correction circuit 11 according to the center frequency of the shake obtained at step S206 is read from a table (not shown) prepared in advance in the microcomputer COM2.

The phase and gain correction circuit 11 is for compensating the deterioration of the shake correction characteristic due to the phase delay of the shake correction system, has a phase lead element, and is composed of, for example, a digital filter as described later. The correction coefficient is read out from the digital filter, and the phase and gain correction characteristics corresponding to the shake frequency are set.

In step S208, step S207
A correction calculation is performed using the coefficient obtained in step S209, and the calculation result obtained in step S209, that is, the corrected angular displacement signal is converted into an analog signal by the D / A converter 7,
Alternatively, as a pulse output such as PWM, the microcomputer COM2
Output more.

Since the HPF 10, the integrator circuit 5, and the phase / gain correction circuit 11 use digital filters or the like, the sampling time must be relatively high (for example, about 1 kHz), but panning / tilting and photographing are performed. The determination circuit 12 that determines the state and the frequency detection unit 13 may perform processing at a relatively slow cycle (for example, 100 Hz). In other words, it can be changed according to the situation.

As the frequency detecting means 13 using the angular velocity signal shown in FIG. 1, for example, a threshold value is provided near the center of the signal, and the detection can be performed by the time at which the center is crossed or the number of times of crossing in a fixed time. But with this method,
It depends on the stability of DC signals. In other words, when shooting with a handheld device, it is difficult to accurately detect the shake frequency because low frequency components are included considerably.

Therefore, the frequency is detected by paying attention to the increase and decrease of the signal for each sampling. That is, one set of increase / decrease of the signal is regarded as one shake, and the frequency is calculated depending on how many sets are detected within a predetermined time. With this method, it is possible to detect every 1 Hz for 1 second and every 0.5 Hz for 2 seconds.

Frequency detecting means 1 in this embodiment
An example of the method and operation of No. 3 will be described with reference to the flowchart shown in FIG. It should be noted that this process is performed once every fixed time.
It shall be repeated at a rate of once.

In step S301, the frequency detection time T
Of the clock function counter t, that is, the count operation of the counter is started in step S302, the frequency detection time T is compared with the clock counter t in step S303, and the count value of the clock counter is read. It is determined whether or not t has reached the predetermined time T, and if the clock counter t has reached T, the process proceeds to step S319.
If not reached, the process proceeds to step S304.

In step S304, "1" is added to the clock counter. Therefore, this "1" count-up coincides with the processing time when the processing shown in the flow chart of FIG. 3 is executed once.

In step S305, an increase flag 1 for confirming whether the increase of the angular velocity signal has occurred up to the previous time.
To load. The increase flag is set to "H" when the increase has occurred up to the previous time, and is set to "L" when the increase has not occurred in the past.

In step S306, it is determined by the flag 1 whether or not the increase in the angular velocity signal has occurred up to the previous time. If the flag 1 = "H", it is determined that the increase has occurred in the past and step S307. Go to, flag 1 =
If "L", it is determined that the increase has not occurred in the past, and the process proceeds to step S312.

In step S306, if the increase in the angular velocity signal has occurred up to the previous time, step S30
At 7, the decrease flag 2 is loaded to see if the decrease has occurred by the previous time. Decrease flag 2 is
If the decrease has occurred up to the previous time, "H" is set, and if the decrease has not occurred in the past, "L" is set.

In step S308, it is determined whether or not the decrease has occurred up to the previous time by the flag 2, and the flag 2 =
If "H", that is, a decrease has occurred in the past, the process proceeds to step S309, and if flag 2 = "L", that is, a decrease has not occurred in the past, the process proceeds to step S312.

In step S309, the shake number counter N1 for counting the number of shakes (vibrations) is loaded, and in step S310, "1" is added to the shake number counter N1, and then the process proceeds to step S311 to increment the increase flag. 1, the reduction flag 2 is reset, and the process is ended.

On the other hand, when it is determined in step S306 that the increase flag 1 is not "H" and when it is determined that the decrease flag 1 is not "H" in step S308, that is, when neither increase nor decrease has occurred in the past. To step S312 and one sampling before (previous processing)
Angular velocity data ω-1 at step S3 is loaded, and then step S3
In step 13, the current angular velocity data ω detected by the angular velocity detecting means 1 is loaded.

In step S314, the threshold level "a" for the change that determines that the angular velocity data has increased or decreased within one sampling period is loaded. By this threshold level a and sampling time,
The value can be set according to the frequency and amplitude.

In step S315, the absolute value of the amount of change in the angular velocity data within one sampling period is compared with the threshold level a, and if it has not reached that value, step S32
If the absolute value of the change amount is equal to or higher than the threshold level a, the process proceeds to step 4
In step S16, it is determined whether the amount of change in angular velocity during one sampling period is positive (increase) or negative (decrease). If positive, the flow advances to step S317 to set the increase flag 1 to "H". If it is not positive (if it is decreased), the process proceeds to step S318 and the decrease flag 2 is set to "H".
Is set to step S324, and the process proceeds to step S324 to end the process.

If the count value of the clock counter t has reached the frequency detection time T in the above step S303, the process proceeds to step S319, the shake number counter N1 is loaded, and the shake is counted in step S320. The number of times N1 is divided by the detection time T to obtain the number of shakes (runout frequency F) per unit time (one second).

Then, in step S321, the shake counter N1 is cleared, and in step S322, the clock counter t.
Is cleared, the shake frequency F is stored in a predetermined storage area in step S323, and the process proceeds to step S304. The subsequent operation is as described above.

Thus, the increase / decrease of the angular velocity signal is
By considering one vibration as a set, it is easy to detect the vibration in the low frequency range (for example, 1 Hz or less), and the influence of the noise component can be removed by setting the threshold level a. In addition, there is a merit that can be easily realized by performing processing using a microcomputer.

Frequency determining means 1 in this embodiment
In No. 3, as a method for detecting the shake frequency and determining the frequency to be corrected, the shake correction control characteristic is improved based on the following idea.

For example, in the method of detecting the respective frequency components of the frequency from the angular velocity signal suitable for detecting the frequency of the high frequency and the frequency from the angular displacement signal suitable for detecting the reduction, the vibration isolation characteristic is When it is important to correct for low frequencies, such as when held by hand, the detection level is set so that the low frequency frequency can be detected from the output of the angular displacement signal even with a relatively small amplitude. , A relatively low frequency is corrected from the characteristics of the angular displacement signal.

In such a case, the correction for the high frequency component may be made when the amplitude is large. Therefore, the frequency detection by the angular velocity signal is set so that the frequency is detected when the amplitude is large. When a high frequency with a large amplitude is detected, the fluctuation of the frequency may be corrected.

FIG. 11 shows the above contents in a flow chart.

In step S401, the angular velocity detection signal is read, and in step S402, the increase / decrease threshold levels for frequency detection are set in the descending order as described above, and the frequency of relatively large amplitude is set to be detected. Read the frequency (A Hz).

In step S404, the angular displacement signal is read, and in step S405, the increase / decrease threshold level for frequency detection is set to a small value so that a frequency with a relatively small amplitude can be detected, and the frequency (B Hz) detected in step S406 is detected. ) Is read.

In S407, the detected frequencies are compared, and the frequency (A H obtained from the angular velocity signal is compared.
If z) is a higher frequency, the correction frequency is set to a large amplitude and high frequency A Hz in S408, and if the results of comparing the frequencies are the same frequency, the frequency (here, B Hz) is set to the correction frequency in S409, If the result of comparing the frequencies is that the angular displacement signal has a higher frequency, S
At 410, the correction frequency is controlled to be B Hz of relatively low amplitude and relatively low amplitude and low frequency.

<Second Embodiment> FIG. 12 shows a second embodiment of the shake correction photographing apparatus of the present invention.

The present embodiment is the same as that shown in the first embodiment in the contents intended by the invention, and shows a concrete example having a different circuit structure, and is the same as the structure shown in FIG. Portions of the parts are given the same reference numerals and the description thereof will be omitted.

The difference from the first embodiment in FIG. 1 is that
The analog switches 28 and 27 are used to change the means for changing the characteristics for phase correction and gain correction (the resistance value for setting the time constant of the HPF and the resistance value for setting the gain of the variable gain amplifier, respectively). , The duty ratio for turning on / off the resistor R10 arranged from the angular velocity sensor 1 to the output of the amplifier 3 and the resistor R9 inserted into the feedback loop of the OP amplifier 26 arranged on the output side of the integrator 5 is P.
By performing PWM control by the WM generating circuit 29,
It is configured so as to obtain the same function as that of controlling the amount of current flowing in the circuit and substantially changing the resistance value.

Therefore, the system itself is the same as that of the first embodiment of FIG. 1, and the analog switch 2 is used when the frequency judgment is performed.
The shake characteristic is controlled by changing the phase characteristic by operating 8 and by changing the gain of the variable gain amplifier by operating the analog switch 27.

[0076]

As described above, according to the shake correction photographing apparatus of the present invention, even when various frequencies are mixed in the vibration applied to the apparatus, the main component of the shake frequency is The correction can be surely performed, and for example, the shake can be adaptively corrected from a small high frequency component to a low frequency component.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a shake correction photographing apparatus according to the present invention.

FIG. 2 is a flow chart for explaining the operation of the first embodiment of the shake correction photographing apparatus of the present invention.

FIG. 3 is a flow chart for explaining the control operation of the frequency detection means in the shake correction photographing apparatus of the present invention.

FIG. 4 is a diagram showing a configuration of a lens unit provided with an optical shake correcting means using a variable apex angle prism.

FIG. 5 is a block diagram of a drive system of a variable apex angle prism.

FIG. 6 is a diagram showing another example of a lens unit provided with an optical shake correcting means using a variable apex angle prism.

FIG. 7 is a block diagram of a drive system that drives the optical shake correction unit shown in FIG.

FIG. 8 is a diagram for explaining the configuration and operation of the variable apex angle prism.

FIG. 9 is a diagram for explaining the configuration and operation of the variable apex angle prism.

FIG. 10 is a block diagram showing a configuration of an electronic shake correction unit by image processing.

FIG. 11 is a flow chart for explaining a shake correction operation of the shake correction photographing apparatus of the present invention.

FIG. 12 is a block diagram showing a second embodiment of the shake correction photographing apparatus of the present invention.

FIG. 13 is a block diagram showing an example of a shake correction photographing apparatus before the application of the present application.

Claims (3)

[Claims] 1. A detection means for detecting a vibration of a device, a correction means for correcting a movement of an image due to the vibration, and a control means for controlling the correction means based on an output of the detection means,
First control means for driving the correction means in a direction of correcting the movement of the image; frequency determination means for detecting the frequency of the output signal of the detection means; and the first control means based on the output of the frequency determination means. The image stabilization apparatus according to claim 1, further comprising: second control means for controlling characteristics of the control means. 2. The first frequency detecting means according to claim 1, wherein the detecting means outputs an angular velocity signal and an angular displacement signal, and the frequency determining means detects a frequency based on the angular velocity signal, and the angular displacement. A shake correction photographing apparatus, comprising: a first frequency detecting unit that detects a frequency based on a signal. 3. The method according to claim 2, wherein the first frequency detecting means detects a high frequency component of vibration, and the second frequency detecting means detects a constant component of vibration.