JP2000075334A - Vibration-proof controller, optical equipment and interchangeable lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize miniaturization and lightening in weight and to output an accurate vibration detection signal by removing an offset signal superposed on the vibration detection signal in accordance with the state of a vibration- proof controller and the state of equipment on which the vibration-proof controller is mounted. SOLUTION: This controller is provided with vibration detection means 19a and 19b detecting vibration, and offset signal removing means 116a to 116h arithmetically calculating the offset signal component for a specified period based on the vibration detection signal from the means 19a and 19b and removing the offset signal superposed on the vibration detection signal by subtracting the arithmetically calculated value from the vibration detection signal; and the means 19a and 19b and the means 116a to 116h are constituted in the same unit 21, which is provided with an input terminal 116i in which the signal for controlling the specified period is inputted from the outside of the vibration- proof controller constituting the unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration control device having an offset signal removing means for removing an offset signal superimposed on a vibration detection signal, an optical apparatus, and an interchangeable lens.

[0002]

2. Description of the Related Art In a current camera, all operations important for photographing, such as exposure determination and focusing, are automated. Therefore, even a person unskilled in camera operation is very unlikely to fail in photographing.

[0003] Recently, a system for preventing camera shake added to a camera has been studied, and a factor which causes a photographer to make a photographing error has almost disappeared.

Here, a system for preventing camera shake will be briefly described.

The camera shake at the time of photographing is generally a vibration of 1 Hz to 10 Hz as a frequency. At the time of the release of the shutter, even if such camera shake occurs, it is possible to take a picture without image shake. As an idea, it is necessary to detect the camera shake caused by the camera shake and to displace the correction lens according to the detected value.
Therefore, in order to take a photograph in which image shake does not occur even when camera shake occurs, first, it is necessary to accurately detect the camera vibration and, secondly, to correct the optical axis change due to camera shake. Become.

In principle, this vibration (camera shake) is detected by a shake detection sensor that detects acceleration, angular acceleration, angular velocity, angular displacement, and the like, and an output of the shake detection sensor is appropriately processed for camera shake correction. This can be performed by mounting a vibration detection device having a calculation unit on a camera. Then, based on this detection information, the image blur suppression is performed by driving the correcting means for decentering the photographing optical axis.

FIG. 23 is an external perspective view of a compact camera having an image stabilizing system.
The camera has a function of performing shake correction for camera vertical shake and horizontal shake indicated by p and 42y.

In the camera body 43, 43a is a release button, 43b is a mode dial (including a main switch), 43c is a retractable strobe, and 43d is a finder window.

FIG. 24 is a perspective view showing the internal structure of the camera shown in FIG. 23, wherein 44 is a camera body, 51 is a correction means, 52 is a correction lens, and 53 is a correction lens 52 in the directions 58p and 58y in the figure. 23 is freely driven by the arrow 42 in FIG.
This is a support frame for performing shake correction in the p and 42y directions, and details thereof will be described later. 45p and 45y are arrows 46p,
It is a vibration detecting device such as an angular velocity meter or an angular accelerometer for detecting a shake around 46y.

The outputs of the vibration detecting devices 45p and 45y are converted into drive target values of the correcting means 51 via arithmetic units 47p and 47y, which will be described later, and input to the coils of the correcting means 51 to perform shake correction. Incidentally, 54 is a ground plane, 56p and 56y are permanent magnets, and 510p and 510y are coils.

FIG. 25 is a block diagram showing details of the arithmetic units 47p and 47y. Since these units have the same configuration, only the arithmetic unit 47p will be described in FIG.

The arithmetic unit 47p includes a DC cut filter 48p and a low-pass filter 49 surrounded by a dashed line.
p, an analog / digital conversion circuit (hereinafter, referred to as an A / D conversion circuit) 410p, a driving device 419p, and a camera microcomputer 411 indicated by a broken line. The camera microcomputer 411 includes a storage circuit 412p, a differential circuit 4
13p, DC cut filter 414p, integration circuit 415
p, a storage circuit 416p, a differential circuit 417p, and a PWM duty change circuit 418p.

Here, a vibration gyro for detecting a shake angular velocity of the camera is used as the vibration detection device 45p. The vibration gyro is driven in synchronization with turning on of a main switch of the camera, and detects a shake angular velocity applied to the camera. To start.

In the output signal of the vibration detecting device 45p, a DC bias component superimposed on the output signal is cut by a DC cut filter 48p composed of an analog circuit. The DC cut filter 48p has a frequency characteristic of cutting a signal having a frequency of 0.1 Hz or less, and does not affect a camera shake frequency band of 1 to 10 Hz applied to the camera. However, like this
If the characteristic is set so as to cut the frequency below 0.1 Hz, there is a problem that it takes about 10 seconds from the input of the shake signal from the vibration detection device 45p until the DC is completely cut. Therefore, the time constant of the DC cut filter 48p is set to be small (for example, a characteristic of cutting a signal having a frequency of 10 Hz or less) until, for example, 0.1 second after the main switch of the camera is turned on. Cut DC in a short time, then increase the time constant (
DC with the characteristic to cut only the frequency below 0.1Hz) DC
The cut filter 48p prevents the shake angular velocity signal from deteriorating.

The output signal of the DC cut filter 48p is
The signal is appropriately amplified by the low-pass filter 49p formed of an analog circuit in accordance with the resolution of the A / D conversion circuit 410p, and high-frequency noise superimposed on the shake angular velocity signal is cut. This is to prevent the reading of the sampling of the A / D conversion circuit 410p when the shake angular velocity signal is input to the camera microcomputer 411 from occurring due to the noise of the shake angular velocity signal. The output signal of the low-pass filter 49p is sampled by the A / D conversion circuit 410p and taken into the camera microcomputer 411.

Although the DC bias component is cut by the DC cut filter 48p, the DC bias component is again superimposed on the shake angular velocity signal by the amplification of the low-pass filter 49p. It is necessary to perform DC cut again.

Therefore, for example, the shake angular velocity signal sampled 0.2 seconds after the camera is turned on is stored in the storage circuit 412p, and the difference between the stored value and the shake angular velocity signal is obtained by the differential circuit 413p to perform DC cut. . In this operation, only a rough DC cut can be performed. (Since the shake angular velocity signal stored 0.2 seconds after the main switch of the camera is turned on includes not only a DC component but also an actual camera shake, ), DC cut filter 414p constituted by a digital filter in the subsequent stage
Performs a sufficient DC cut. The time constant of the DC cut filter 414p can be changed similarly to the analog DC cut filter 48p, and the time constant is gradually increased by spending another 0.2 second 0.2 seconds after the main switch of the camera is turned on. . More specifically, the DC cut filter 414p has a filter characteristic of cutting a frequency of 10 Hz or less when 0.2 seconds have elapsed since the main switch was turned on. Thereafter, the frequency cut by the filter every 50 msec is changed to 5 Hz, 1 Hz, or 5 Hz. 0.5H
z, 0.2Hz.

However, when the photographer presses the release button 43a halfway (turns on sw1) and performs photometry and distance measurement during the above-described operation, there is a possibility that photography is immediately performed, and time is consumed by the time constant. It may not be desirable to make changes. Therefore, in such a case, the change of the time constant is stopped halfway according to the photographing conditions. For example, it has been found from the photometry result that the shooting shutter speed is 1/60, and the shooting focal length is 15/60.
At 0 mm, the vibration isolation accuracy is not so required.
The C cut filter 414p is completed when the time constant is changed to the characteristic of cutting the frequency of 0.5 Hz or less (the time constant change amount is controlled by the product of the shutter speed and the photographing focal length). As a result, the time for changing the time constant can be reduced, and the photo opportunity can be prioritized. Of course, when the shutter speed is higher or the focal length is shorter, the characteristic of the DC cut filter 414p is completed when the time constant is changed to the characteristic for cutting the frequency of 1 Hz or less. At the time, shooting is prohibited until the time constant is completely changed.

The integration circuit 415p starts integrating the output signal of the DC cut filter 414p in response to the half-press of the release button 43a of the camera (sw1 is turned on), and converts the angular velocity signal into an angle signal. However, as described above, when the time constant change of the DC cut filter 414p is not completed, the integration operation is not performed until the time constant change is completed. still,
Although omitted in FIG. 25, the integrated angle signal is appropriately amplified based on the focal length and subject distance information at that time, and converted so as to drive an appropriate amount correction unit 51 according to the shake angle (zoom focus). Changes the photographing optical system, and the amount of eccentricity of the optical axis changes with respect to the driving amount of the correcting means 51, so that it is necessary to perform this correction.)

Push release of the release button 43a (sw2
(ON), the correction means 51 starts to be driven in accordance with the shake angle signal. At this time, however, it is necessary to take care that the shake correction operation of the correction means 51 does not suddenly start. The storage circuit 416p and the differential circuit 417p are provided for this measure. The storage circuit 416p stores the release button 4
Integrator circuit 4 in synchronization with pushing off of 3a (on of sw2)
The 15p shake angle signal is stored. Differential circuit 417p
Calculates the difference between the signal of the integration circuit 415p and the signal of the storage circuit 416p. Therefore, when the switch sw2 is on, the two signal inputs of the differential circuit 417p are equal,
Although the drive target value signal to the 17p correction means 51 is zero, the output is continuously performed from zero thereafter (the storage circuit 416p plays the role of using the integrated signal at the time of turning on the switch sw2 as the origin). As a result, the correcting means 51 is not driven suddenly.

The target value signal from the differential circuit 417p is P
It is input to the WM duty change circuit 418p. When a voltage or a current corresponding to the deflection angle is applied to the coil 510p (see FIG. 24) of the correction unit 51, the correction lens 52
Is driven in accordance with the deflection angle. However, PWM driving is desirable in order to reduce the driving power consumption of the correction unit 51 and the power consumption of the coil driving transistor.

Therefore, the PWM duty changing circuit 418
p changes the coil drive duty according to the target value. For example, in a PWM having a frequency of 20 KHz,
When the target value of the differential circuit 417p is "2048", the duty is set to "0", when the target value is "4096", the duty is set to "100", and the interval is equally divided to determine the duty according to the target value. The duty is determined not only by the target value but also by the camera's photographing conditions (temperature, camera attitude, power supply state) at that time, so that accurate shake correction is performed.

The output of the PWM duty changing circuit 418p is input to a known driving device 419p such as a PWM driver, and the output of the driving device 419p is applied to a coil 510p (see FIG. 24) of the correction means 51 to perform shake correction. Do.
The driving device 419 is turned on in synchronization with the turning on of the switch sw2, and turned off when the exposure of the film is completed. or,
Even after the exposure is completed, the release button 43a is pressed halfway (sw
The integration circuit 415p continues integration as long as the switch 1 is turned on, and the storage circuit 416p stores a new integration output again when the next switch sw2 is turned on.

When the release button 43a is half-pressed, the integration circuit 415p stops integrating the output of the DC cut filter 414p, and resets the integration circuit 415p. Resetting is to empty all information that has been integrated up to now.

When the main switch is turned off, the vibration detecting device 45
p is turned off, and the image stabilization sequence ends.

When the output signal of the integration circuit 415p becomes larger than a predetermined value, it is determined that the camera has been panned, and the time constant of the DC cut filter 414p is changed. For example, the characteristic that cuts the frequency of 0.2 Hz or less is changed to the characteristic that cuts the frequency of 1 Hz or less,
The time constant is restored again in a predetermined time. The time constant change amount is also controlled by the magnitude of the output of the integration circuit 415p. That is, when the output signal exceeds the first threshold, D
The characteristic of the C-cut filter 414p is set to a characteristic that cuts 0.5 Hz or less. When the characteristic exceeds the second threshold, the characteristic is cut to 1 Hz or less. When the characteristic exceeds the third threshold, 5H is set.
A characteristic that cuts z or less is set.

When the output of the integrating circuit 415p becomes very large, the integrating circuit 415p is reset once to prevent the saturation (overflow) in the operation.

In FIG. 25, the DC cut filter 41
4p is configured to start the operation 0.2 seconds after the main switch is turned on. However, the present invention is not limited to this, and the operation may be started by half-pressing the release button 43a. In this case, the integration circuit 415p is activated from the time when the change of the time constant of the DC cut filter is completed.

The integration circuit 415p is also operated by the release button 4
Although the operation is started by half-pressing the switch 3a (sw1), the operation may be started by pressing the release button 43a off (sw2). In this case, the storage circuit 41
6p and the differential circuit 417p become unnecessary.

In FIG. 25, the DC cut filter 48p and the low-pass filter 49p are provided in the arithmetic unit 47p, but it is needless to say that these may be provided in the vibration detecting unit 45p.

26 to 28 are views showing the details of the correction means 51. More specifically, FIG. 26 is a front view of the correction means 51, and FIG. 27 (a) is a side view seen from the direction of arrow B in FIG. FIG. 27B is a sectional view taken along line AA of FIG. 26, and FIG.

In FIG. 26, the correction lens 52 (FIG. 27)
As shown in (b), this correction lens 52 is
Lens 52a, 52b fixed to the
, Which constitutes a group of photographing optical systems), is fixed to a support frame 53.

A yoke 55 made of a ferromagnetic material is attached to the support frame 53, and permanent magnets 56p and 56y of neodymium or the like are attracted and fixed (shown by hidden lines) to the back surface of the yoke 55 in FIG. Also, three pins 53a extending radially from the support frame 53 are fitted into long holes 54a provided in the side walls 54b of the base plate 54.

As shown in FIGS. 27A and 28, the pin 5
3a and the long hole 54a are fitted in the direction of the optical axis 57 of the correction lens 52 so that there is no play, but since the long hole 54a extends in the direction orthogonal to the optical axis 57, the support frame 53 is 5
4 is restricted in the direction of the optical axis 57, but can move freely in a plane perpendicular to the optical axis (arrows 58p, 58p).
y, 58r). However, as shown in FIG. 26, since the tension spring 59 is hung between the hook 53b on the support frame 53 and the hook 54c on the base plate, each direction (58p, 58
y, 58r).

The coils 510p and 510y are attached to the base plate 54 so as to face the permanent magnets 56p and 56y (partly hidden lines). The arrangement of the yoke 55, the permanent magnet 56p, and the coil 510p is as shown in FIG. 27B (the permanent magnet 56y and the coil 510y have the same arrangement).
When a current is passed through 10p, the support frame 53 is driven in the direction of the arrow 58p.
3 is driven in the direction of arrow 58y.

The driving amount is determined by the spring constant of the tension spring 59 in each direction and the coils 510p and 510.
y and the thrust generated in relation to the permanent magnets 56p and 56y. That is, the amount of eccentricity of the correction lens 52 can be controlled based on the amount of current flowing through the coils 510p and 510y.

[0037]

As described with reference to FIG. 25, the DC bias component superimposed on the signal of the vibration detection device 45p (45y) is cut by the DC cut filter 48p composed of an analog circuit. You. This D
The configuration of the C-cut filter 48p is as shown in FIG.
Operational amplifier 420p, capacitor 421p, resistor 422
p, 423p and a switch 424p (the same applies to the DC cut filter of the vibration detection device 45y). Then, the characteristics of this DC cut filter 48p are
In order to set a characteristic of cutting a frequency of 0.1 Hz or less, for example, a capacitor 421p is set to 10 μF and a resistor 422 is set.
Let p be 160 kΩ.

The resistance value of the resistor 423p is set to, for example, 1.6 k.
When the switch 424p is closed, the DC cut filter 48p cuts the frequency of 10 Hz or less, and when the switch 424p is opened, the cutoff frequency is 0.1 Hz or less. By closing the switch 424p until, for example, 0.1 second elapses after the main switch is turned on, it is possible to cut the DC component early.

By the way, in the circuit configuration of FIG. 29, since a large-capacity capacitor of 10 μF is used for the capacitor 421p, the circuit becomes considerably large.
In addition, there was a problem that the cost was high. Further in this way DC
When the cut filter 48p is formed, there is a problem that the accuracy of the image stabilization is reduced. This will be described with reference to FIGS.

FIG. 30 shows the DC cut filter 48 of FIG.
5 conceptually shows a frequency characteristic of p, and a line segment 425 is
The ratio (gain) of the output signal to the signal input to the DC cut filter 48p is shown, and the line segment 426 similarly shows the phase of the signal output to the input signal.

Looking at the line segment 425, it can be seen that the gain decreases at frequencies lower than 0.1 Hz, but the output of signals below this frequency is attenuated, and DC cut characteristics can be obtained. .

In order to perform image stabilization with high accuracy, it is necessary to input the signal of the vibration detecting device to the correcting means with as little phase shift as possible.
At 10 Hz to 10 Hz, the phase is advanced particularly on the low frequency side, and accurate vibration isolation cannot be performed.

In order to improve the anti-vibration accuracy, for example, the current DC cut filter that cuts a frequency of 0.1 Hz or less may be changed to a characteristic that cuts 0.01 Hz. However, in this case, the capacitance of the capacitor 421p is increased to, for example, 100 μF (or the resistance 422p is
1.6 MΩ), which is not preferable in terms of circuit scale and noise.

As described above, the current DC cut filter has a large capacitor and is not suitable for miniaturization and cost reduction.
Further, there is a problem that the vibration control accuracy is reduced.

(Purpose of the Invention) A first object of the present invention is to reduce the size and weight of the apparatus and to provide a vibration detection signal according to the state of the anti-vibration control device and the state of the equipment on which the anti-vibration control apparatus is mounted. An object of the present invention is to provide an image stabilization control device capable of removing a superposed offset signal and outputting a highly accurate vibration detection signal.

A second object of the present invention is to provide an optical device capable of removing an offset signal superimposed on a vibration detection signal in accordance with the state of the optical device and outputting a highly accurate vibration detection signal. It is assumed that.

A third object of the present invention is to remove an offset signal superimposed on a vibration detection signal in accordance with a state in which the interchangeable lens is used, and to output a highly accurate vibration detection signal. It is intended to provide.

A fourth object of the present invention is to provide an anti-vibration control device capable of outputting a highly accurate vibration detection signal.

A fifth object of the present invention is to remove an offset signal superimposed on a vibration detection signal in accordance with a use state of a device on which the anti-vibration control device is mounted, and to output a highly accurate vibration detection signal. It is an object of the present invention to provide an anti-vibration control device that can perform the control.

A sixth object of the present invention is to remove an offset signal superimposed on a vibration detection signal in accordance with the state of the anti-vibration control device and the use state of a device on which the anti-vibration control device is mounted. Another object of the present invention is to provide a vibration control device capable of outputting a vibration detection signal with high accuracy.

[0051]

In order to achieve the first object, the present invention according to claims 1 and 3 provides a vibration detecting means for detecting vibration and a vibration detecting signal from the vibration detecting means. An offset signal component for calculating the offset signal component for a predetermined period based on the calculated value, and subtracting the calculated value from the vibration detection signal to remove an offset signal superimposed on the vibration detection signal. An anti-vibration control device in which the detection means and the offset signal removing means are configured by the same unit, and an input for inputting a signal for controlling the predetermined period from outside the anti-vibration control device forming the unit. This is an anti-vibration control device having terminals.

Similarly, in order to achieve the first object,
According to a second aspect of the present invention, there is provided a vibration detecting means for detecting a vibration, and an offset signal component is calculated for a predetermined period based on the vibration detecting signal from the vibration detecting means, and the calculated value is used as the vibration detecting signal. And an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal by subtracting from the vibration detection signal, and the vibration detection unit and the offset signal removing unit are configured by the same unit. A signal generating means for generating a signal for controlling the predetermined period inside the image stabilization control device forming a unit, and controlling the predetermined period from outside the image stabilization control device. And an input terminal for inputting the above signal.

In order to achieve the second object,
According to a fourth aspect of the present invention, a vibration detecting means for detecting vibration, an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. And an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the offset signal removing unit responds to a main power supply of the optical device being turned on. Then, the optical device starts the operation of removing the offset signal superimposed on the vibration detection signal.

Similarly, in order to achieve the second object,
According to a fifth aspect of the present invention, a vibration detecting means for detecting vibration, an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. And an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the offset signal removing unit causes the optical device to perform distance measurement or photometry. The optical device starts an operation of removing an offset signal superimposed on the vibration detection signal in response to an operation.

Similarly, in order to achieve the second object,
According to a sixth aspect of the present invention, there is provided a vibration detecting means for detecting a vibration, and an offset signal component is calculated for a predetermined period based on the vibration detecting signal from the vibration detecting means, and the calculated value is used as the vibration detecting signal. And an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal by subtracting from the vibration detection signal, wherein the predetermined period and the drive timing of an actuator mounted on the optical device are It is an optical device that controls so as not to overlap.

Similarly, in order to achieve the second object,
The present invention according to claims 8 and 9, wherein a vibration detecting means for detecting vibration, an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is used as the vibration detection signal. And an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal by subtracting from the vibration detection signal. The optical device includes a predetermined period control unit that is changed according to at least one of a mode and a use posture of the optical device.

Similarly, in order to achieve the second object,
According to a tenth aspect of the present invention, a vibration detecting means for detecting a vibration, an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An optical device comprising: an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal; and a camera mode switching member that switches between a still camera mode and a video camera mode. And an optical device having a predetermined period control means for changing the predetermined period in accordance with the mode selected by (1).

Further, in order to achieve the third object,
According to the eleventh aspect of the present invention, a vibration detecting means for detecting a vibration, an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An interchangeable lens that has an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, and is used by being attached to both a still camera body and a video camera body. An interchangeable lens having a predetermined period control means for changing the predetermined period depending on whether the interchangeable lens is attached to a still camera or a video camera.

In order to achieve the fourth object,
The present invention according to claims 12 to 16, wherein a vibration detecting means for detecting vibration, an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is used as the vibration detection signal. By subtracting from the vibration detection signal, the offset signal removal means for removing an offset signal superimposed on the vibration detection signal, the vibration detection signal from the vibration detection means indicates that the vibration is small In this case, the anti-vibration control device includes an operation control means for operating the offset signal removing means.

In order to achieve the fifth object,
In the present invention according to Claims 14 to 16, the device in which the image stabilization control device is mounted is a photographing device, and the operation control unit includes:
When the operation member for changing the photographing state is operated among the operation members mounted on the photographing device, the image stabilization control device does not operate the offset signal removing unit.

In order to achieve the sixth object,
The present invention according to claims 17 to 21, wherein a vibration detecting means for detecting vibration, an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is used as the vibration detection signal. And an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal by subtracting from the vibration detection signal, wherein a first time has elapsed since the vibration detecting unit started operating. An anti-shake control device having operation control means for operating the offset signal removing means later.

More specifically, the first time is changed according to the ambient temperature when the optical device is used, or is changed based on the time elapsed since the last operation of the vibration detecting means was stopped. Like that.

In order to achieve the fourth object,
The present invention according to claims 22 to 24, wherein a vibration detecting means for detecting vibration, an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is used as the vibration detection signal. And an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal by subtracting from the vibration detection signal, wherein the offset is maintained until power supplied to the vibration detection unit is stabilized. This is an anti-shake control device having an operation control means for operating the signal removing means.

Specifically, while the power is being stored in the main capacitor of the flash means provided in the photographing apparatus, the operation of the offset signal removing means is continued, and the storage of the power in the main capacitor of the flash means is completed. After a lapse of a predetermined time, the operation of the offset signal removing means is stopped.

[0065]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a block diagram showing a circuit configuration of a camera according to the first embodiment of the present invention, in which only parts according to the present embodiment are shown, and other elements of the camera will be briefly described. Omitted to do so.

In FIG. 1, when the ON signal of the main switch 114 is input, the camera microcomputer 11 extends the photographing lens barrel from the retracted state to the photographable optical system state, and simultaneously opens the lens barrier. At this time, the vibration detecting device 1
9 is also activated.

The photographing mode selected by the photographer is input to the camera microcomputer 11 from the photographing mode input member 112. The shooting modes include, for example, a sports mode suitable for shooting a moving subject, a portrait mode suitable for shooting a person up, a macro mode suitable for shooting a subject close-up, and a night view. It has a night view mode suitable for

The flash mode is input from the flash mode input member 111 to the camera microcomputer 11. There are two strobe modes: a strobe off mode that does not use a strobe, a strobe on mode in which the strobe is forcibly fired, and a strobe auto mode that controls whether or not the strobe is fired depending on the brightness of the subject and the direction of the light beam.
Further, it is possible to determine whether to activate the red-eye reduction function at the time of flash emission.

Information on whether or not to perform shake correction at the time of shooting determined by the photographer is input to the camera microcomputer 11 from the anti-shake switch 18. A zoom signal in response to a photographer's operation is transmitted from the zoom operation member 15 to the camera microcomputer 1.
1, the camera microcomputer 11 controls the zoom driving device 16 to change the photographing focal length.

When the photographing focal length is determined, the release button 113 is half-pressed (s1 is turned on) by the photographer. At this half-press timing, the distance measuring device 13 measures the distance to the subject. The microcomputer microcomputer 11 outputs the information (distance measurement information) to the camera microcomputer 11, and the camera microcomputer 11 controls the AF driving device 115 based on the distance measurement information to drive a part or all of the photographing lens barrel and to photograph the optical system. Focus adjustment.

At this time, the shake information from the vibration detecting device 19 is also input to the camera microcomputer 11, and the camera microcomputer 1
6 determines from the shake state whether the camera is hand-held or fixed on a tripod or the ground.

The photometric device 12 measures the brightness of the subject,
The information is output to the camera microcomputer 11. The camera microcomputer 11 has the information and film sensitivity and type, the use state of the anti-vibration system, the shooting focal length and the brightness of the lens at that time, the shooting mode, the selection of shake correction, the distance information to the subject, the shake information, etc. The exposure time is calculated based on the photographing information determined in (1), and at the same time, it is determined whether or not the flash device 17 is used.

When the release button 113 is depressed (s2 is turned on), the camera microcomputer 11 controls the correcting means 110 based on the signal of the vibration detecting device 19 to start the shake correction. After that, the film exposure is performed by controlling the shutter drive device 14, and the flash device 17 emits light according to the situation.

Reference numeral 116 denotes an analog signal processing circuit composed of the DC cut filter 48p and the low-pass filter 49p described with reference to FIG. 25, and cuts an offset component and a noise component superimposed on the output of the vibration detecting device 19, and
/ D converter 117. A / D converter 1
17 samples the signal from the analog signal processing circuit 116 and sends it to the camera microcomputer 11.

Here, the method of cutting the offset signal of the vibration detecting device 19 in the analog signal processing circuit 116 does not use the filter having the frequency characteristic as described with reference to FIG. ing.

The output signal of the vibration detecting device 19 is input to an analog signal processing circuit 116, and is first subtracted by an offset extraction component described later by a differential unit 116a. Differential device 11
The output signal of 6a is amplified by an amplifier / low-pass filter 116b, similarly to the low-pass filter 49p of FIG. 25, by cutting noise superimposed on the signal component.
The output signal of the amplifier / low-pass filter 116b is A / D
At the same time as input to the converter 117, the comparator 116c
Is also entered.

The comparator 116c compares the signal from the amplifier / low-pass filter 116b with the reference signal 116d. The reference signal 116d is substantially half of the power supply voltage input to the vibration detecting device 19, and is the center value of the signal output range of the vibration detecting device 19. This reference signal is then DC cut by a digital filter in the camera microcomputer.
It is also a reference when performing integration.

When the signal from the amplifier / low-pass filter 116b is larger than the reference signal (when there is a positive offset voltage), the comparator 116c outputs the HIGH signal.
When it is smaller than the reference signal (when there is a negative offset voltage), the LOW signal is supplied to the clock gate 116e.
Output to

The clock gate 116e is connected to an automatic reset circuit 116h or an externally operable reset terminal 116.
i, when the clock signal is input from the comparator 11
6c is sent to the up / down counter 116f. The up / down counter 116f has the clock gate 1
When the signal from 16e is HIGH, the count is incremented by one bit every clock, and when LOW, the count is decreased by one bit. The D / A converter 116g outputs an analog signal corresponding to the output of the up / down counter 116f, and outputs, for example, 2 mV to the differential unit 116a when the 1-bit count increases.

The automatic reset circuit 116h outputs a clock signal to the clock gate 116e for 0.1 second, for example, 0.1 second after the analog processing circuit 116 starts operating (after the analog processing circuit is turned on).

In the above-mentioned configuration, first, the main switch 114 of the camera is turned on, and at the same time, the vibration detecting device 19 and the analog processing circuit 116 start operating.

Assuming that there is little vibration such as camera shake for the sake of explanation, the output of the vibration detecting device 19 changes from the start of operation to a waveform 118 in FIG. the offset V _1.

Here, the signal fluctuates greatly from immediately after the start of the operation to time T ₀ . This is a signal fluctuation until the vibration is stabilized when, for example, a known vibration gyro is used as the vibration detection device, and is a signal fluctuation until the circuit is stabilized when an angular acceleration clock is used.

The automatic reset circuit 116h built in the analog processing circuit 116 operates from T ₁ (for example, 0.1
Seconds) and outputs elapsed clock signal until the time T ₂ after the clock gate 116e. Not to output the clock signal to the clock gate 116e until after time T ₁ is as previously described until it is due to the offset component superimposed on the signal of the vibration detecting device 19 is varied.

Since the output of the differential unit 116a initially generates the signal offset V ₁ at the time T ₁ , the output of the comparator 1
16c outputs a HIGH signal, and every time one clock is input to the clock gate, D / D is input to the differential 116a.
The signal of the A converter 116g increases.

Therefore, the offset component of the signal of the differential unit 116a decreases as the clock increases, and finally the D
In the range of the minimum resolution (for example, 2 mV) of the / A converter 117, the signal of the differential unit 116a alternately fluctuates in accordance with the clock (arrow 120). Automatic reset circuit 116h When the time becomes T ₂ are to stop the output of the clock signal D /
The signal output from the A converter 116g to the differential 116a is fixed to the signal at the time when the clock signal stops outputting. This eliminates the fluctuation of the signal of arrow 120,
Offset component is reduced to V _2.

Here, in the conventional DC cut filter 48p described with reference to FIG. 25, the offset component can be finally reduced to zero, but in the present system, the offset remains slightly (V ₂ ) although it is slight (V ₂ ). There are drawbacks. However, since the signal is removed by the DC cut filter 414p by digital operation in the camera microcomputer, there is no problem in image stabilization performance.

The reason why the analog processing circuit 116 must remove the offset in order to finally remove the offset by the camera microcomputer 11 will be described below.

Now, consider a case where the analog processing circuit 116 does not remove the offset. Before the output of the vibration detecting device 19 is A / D converted and taken into the camera microcomputer 11, the output of the vibration detecting device 19 is amplified with a considerably high gain. This is the vibration detection device 19
This is because the output of the camera shake component that is detected is extremely small. For this reason, the signal of the amplifier may be saturated by an offset component superimposed on the signal. Therefore, in order to prevent this saturation, it is necessary to reduce the signal offset of the vibration detecting device 19 to some extent before amplification.

In the configuration of FIG. 1, the offset component V ₁
Is reduced to V ₂ , thereby preventing the signal of the amplifier / low-pass filter 116b from being saturated.

The output of the actual vibration detecting device 19 is shown in FIG.
It is not as clean as the waveform 118 in FIG.
As shown in a waveform 121 shown in FIG. Its automatic reset circuit 116h at time T ₂ to is left hand shake output partial offset signal V ₃ at the time of stopping the output of the clock. (Waveform 122), sufficiently small offset compared to the beginning of the offset component V ₁ Thus, saturation of the signal on the analog processing circuit 116 can be prevented.

In the offset component removal by the method described above, the circuit can be considerably reduced in size because a large-capacity capacitor is not required unlike the conventional DC cut filter, and the circuit is composed of a capacitor and a resistor. Since there is no time setting circuit, there is an advantage that there is no fear of deterioration in image stabilization accuracy due to a phase shift in a camera shake frequency band.

In FIG. 1, the analog processing circuit 116 is provided with an externally controllable reset terminal 116i, and the reason will be described.

In general, the output of a vibration detecting device is extremely delicate, and the offset component superimposed on a signal changes due to a subtle change in the supplied power supply voltage. Also, inside the camera, there are many actuators such as zoom drive (including the operation of driving the lens from the retracted position to the extended position), strobe zoom drive, focus adjustment drive, shutter drive, etc. Contains many elements that fluctuate.

Although the power supplied to the vibration detecting device is considerably stabilized by the regulator and the DC / DC converter, a slight change still occurs due to the above-mentioned actuator and strobe charging operation, which causes the signal offset of the vibration detecting device to fluctuate. Let it. Therefore, not correctly calculate the offset component when the clock stop is performed at time T _2, as described in FIG. 2 when such.

Further, while the actuator is being driven, the vibration detecting device also detects the driving vibration, so that a correct offset component cannot be similarly obtained.

[0098] Therefore, and outputs the clock signal to the clock gate 116e operates the automatic reset circuit 116h, even if trying to stop the output of the clock signal reaches the time T _2, the other actuator of the camera operation During operation, or when the strobe capacitor is being charged, the camera microcomputer 11 substitutes a similar clock signal through the reset terminal 116i to the clock gate 116e to complete the operation of the actuator and the charging of the capacitor. Until the clock signal is output. When the operation of the actuator is completed and the charging of the capacitor is completed, the camera microcomputer 11 stops outputting the clock signal to the clock gate 116i. As described above, when the actuator is driven, the strobe is charged, or the like during the offset removal, the offset removal operation is continued at least until the operation is completed.

Thus, the offset component superimposed on the output of the vibration detecting device 19 is removed when the other actuator of the camera is not operating and the strobe capacitor is not charging, so that accurate offset removal can be performed.

[0100] As similar concept, the differential signal to during operation of the camera by the operation member, such as a zoom lever or mode dial that camera shake may frequently occur, the differentiator 116a at time T _2, when such If the change of the camera is stopped, the offset component cannot be removed correctly. Therefore, when the camera is operated and the camera is shaken (for example, 0.3 seconds immediately after the operation of the operation The clock is not continued when the time is held).

That is, the automatic reset circuit 116h operates at the time T
_When the operation member of the camera is operated while the output of the clock signal is stopped in Step 2, the camera microcomputer 11
Is an automatic reset circuit 1 via a reset terminal 116i.
The clock signal is output to the clock gate 116e in place of 16h, and the operation of the operation member of the camera is completed (when 0.3 seconds have passed after the operation of the operation member and the operation member is not newly operated). ) Then, the output of the clock signal is stopped.

As a result, it is possible to prevent the offset component of the vibration detecting device 19 from being incorrectly removed due to the shake at the time of operating the operation member.

As can be seen from the above description, it takes some time (for example, 0.1 second) until the analog processing circuit 116 accurately removes the offset component superimposed on the vibration detecting device 19. Depending on the shooting conditions, reducing this standby time can enhance the chance of taking a photo. This will be described below.

The camera shake applied to the camera becomes inconspicuous when the photographing focal length of the camera is short or when the shutter speed is high. Therefore, it is not necessary to make the vibration-proofing accuracy very high, and even if there is a moderate offset component in the vibration detecting device 19, it does not cause a big problem. Therefore, in such a case, the end of the clock signal of the automatic reset circuit 116h (time T ₂ ) is advanced so that the rise of the image stabilizing system is accelerated.

The camera microcomputer 11 detects the zoom state and the shutter speed state at the time of photographing, and the accuracy of the offset removal of the vibration detecting device 19 may not be high due to, for example, a wide zoom or a high shutter speed. At this time, the clock signal of the automatic reset circuit 116h is prevented from being input to the clock gate 116e in conjunction with the half-press of the release button 113.

For example, when the release button 113 is half-pressed in response to the clock signal of the automatic reset circuit 116h which starts when the main switch 114 of the camera is turned on, a signal having a phase opposite to that of the clock is given to the reset terminal 116i to the differential 116a. Forcefully stop changing the differential output.

As is clear from FIGS. 2A and 2B, if the clock signal is stopped before time T ₂ , the offset component superimposed on the vibration detecting device 19 cannot be sufficiently removed. However, under such photographing conditions, since the accuracy of image stabilization is not required, it does not cause a serious problem, and conversely, it is possible to give priority to a photo opportunity.

[0108] Of course time of up to half-press of the on-the release from the button 113 of the main switch 114 can sufficiently remove the offset when there was a T ₂ or more, it is needless to say the high anti-vibration precision can be obtained.

Further, when the focal length is long and the shutter speed is slow, higher image stabilization accuracy is required.
Such gives a clock signal to the clock gate 116e from the clock end time T ₂ of the automatic reset circuit 116h to the camera microcomputer 11 instead of the time, continue to change the differential output to a predetermined time (e.g. 0.2 seconds) differentiator 116a To perform sufficient offset removal to obtain high vibration isolation accuracy.

There are other times when the image stabilization accuracy is required more than usual. For example, when the posture of holding the camera is different, specifically, when the camera is held in the vertical position, the shake is larger than when the camera is held in the horizontal position. Therefore, it is necessary to increase the vibration isolation accuracy. This also such time time T _2, since for a sufficient offset removal continued change of the differential output to a predetermined time differentiator 116a.

Further, when the portrait mode is selected as the photographing mode of the camera, for example, it is necessary to sufficiently remove the offset because the accuracy of the photograph is required to be high. In such a case, the time T ₂ is also required. Thereafter, the differential 116
The change of the differential output to “a” is continued. Conversely, when the sports mode is selected, the calculation of the offset is stopped in the same manner as described above by half-pressing the release button 113 to give priority to the photo opportunity.

When the ambient temperature is low at the time of photographing, the waveform 11 in FIG.
Since the time until the offset of 8 converges to V ₁ becomes long, it is desirable to make the time until the offset removal long. Therefore, when the temperature at the time of photographing is low even after the automatic reset circuit 116h stops outputting the clock signal, the camera microcomputer 11 is replaced when the temperature is low, and the clock signal is output to the clock gate 116e for a while to prevent the offset removal accuracy from deteriorating. In.

As described above, the camera microcomputer 11 finely complements the output of the automatic reset circuit 116h in accordance with the photographing conditions of the camera, thereby maintaining the anti-shake accuracy and securing a shutter chance.

FIGS. 3 and 4 show the camera microcomputer 1 described above.
5 is a flowchart for explaining the operation of FIG. 1, and this flow starts when the main switch 114 of the camera is turned on. (Even when the anti-vibration switch 18 is off, the vibration detecting device 19
This flow operates because the analog processing circuit 116 is driven in standby mode.) In step # 1001, the camera microcomputer 11 applies power to the vibration detection device 19 and the analog processing circuit 116 to start operation. And
In the next step # 1002, an internal timer is started. In step # 1003, T ₁ hour (e.g., 0.1 seconds) to wait. This is to avoid an offset component extraction error due to a large variation of the offset component in the initial stage of driving the vibration detecting device 19 as described with reference to FIG. In the following step # 1004,
From the automatic reset circuit 116h to the clock gate 116e
Start outputting the clock signal.

Note that steps # 1003, # surrounded by a broken line
The step 1004 is a step that automatically proceeds after the analog processing circuit 116 starts operating, and is not a step that the camera microcomputer 11 controls. (Analog processing circuit 116
Upon application of power to the camera microcomputer 11 without begin the offset removing operation after T ₁ in the analog processing circuit 116 itself also) the next step # 1005, obtains the product of the photographing focal length Z and the shutter speed S, which Is less than or equal to "2", the flow proceeds to step # 1013 in FIG.
For example, if the focal length is 200 mm and the shutter speed is 1
When the shutter speed is 1/125 seconds, the product is "1.6" when the shutter speed is 1/125 seconds. In the former case, there is a risk of image degradation due to camera shake, so the process proceeds to the normal step, that is, step # 1006. In the latter, a step in which shutter chance is prioritized over image stabilization accuracy because image degradation due to camera shake is relatively small. # 1013
Proceed to.

In step # 1006, it is determined whether or not the shooting mode of the camera is the sports mode. If the mode is the sports mode, the process proceeds to step # 1013 in FIG.
Proceed to 7. In step # 1007, it is determined whether or not the shooting mode of the camera is the portrait mode. When the camera is in the portrait mode, the image quality is prioritized, and time is taken for offset removal in order to further improve the image stabilization accuracy. Proceed to step # 1019; otherwise, step # 1008
Proceed to.

In step # 1008, the ambient temperature state at the time of photographing is checked. When the temperature is low, the time required for the signal of the vibration detecting device 19 to stabilize becomes long, so the process proceeds to step # 1019 where time is required for offset removal. If not, go to step # 1009. Step # 1009
In, when the camera is held in the vertical position from the posture of the camera, the camera shake becomes large, so the process proceeds to step # 1019 for increasing the image stabilization accuracy, and otherwise, the process proceeds to step # 1010. Step # 1010 is the same step as step # 1005, but when the product of the photographing focal length and the shutter speed is larger than “10”,
For example, focal length 300mm, shutter speed 1/15
In such a case, since high vibration isolation accuracy is required, the process proceeds to step # 1019 for increasing the vibration isolation accuracy.
Otherwise, the process proceeds to step # 1011.

The condition in which the flow proceeds to step # 1011 is a case where a certain degree of image stabilization is required, but not so high. In such a case, the timer started to operate when the main switch 114 is turned on becomes T ₂
Then, the process proceeds to step # 1012. Then, in step # 1012, the automatic reset circuit 116h stops outputting the clock. Steps # 1011 and # 1012 surrounded by the broken lines are not the control steps of the camera microcomputer 11, but the analog processing circuit 1
Reference numeral 16 denotes a step which is automatically performed at a time after the power is turned on. When the clock output is stopped in step # 1012 as described above, this flow ends.

The flow from step # 1013 onward in FIG. 4 is a flow when little anti-vibration accuracy is required following step # 1005 or step # 1006.
In 013, to determine the half-pressed state of the release button 113, or the release button 113 proceeds to step # 1014 when it is half-pressed, the process proceeds to step # 1015 when it is not, the lapse time T ₂ are here not or it is determined, the release button 113 when it passed the time T ₂ without being half-pressed, the process proceeds to step 1018, when that is not passed back to the step # 1013.

If the release button 113 is half-pressed before the time T ₂ has elapsed, the process proceeds to step # 1014 as described above, where the camera microcomputer 11 sends the clock to the clock gate 116e via the reset terminal 116i. Gives the opposite phase signal of the signal. Thus, the clock signal from the automatic reset circuit 116h is canceled by the clock signal from the camera microcomputer 11, and the clock signal is not input to the clock gate 116e. Therefore, at this time, the offset removal of the vibration detecting device 19 is forcibly stopped.

In the next step # 1016, T ₂
After waiting for the time, the process proceeds to step # 1017. And
In the next step 1017, the camera microcomputer 11 stops the clock reverse phase signal. This is because the clock signal from the automatic reset circuit 116h stops outputting at this time. Then, this flow ends.

[0122] In the step # 1015, when the elapsed T ₂ hours the flow advances to step # 1018 as described above, it stops the clock signal of the automatic reset circuit 116h. That is, even when the image stabilization accuracy is not so required, if the release button 113 is not half-pressed immediately after the camera main switch 114 is turned on, the analog processing circuit 116 continues the offset removal operation until then, and the accurate offset removal is performed. I do. Step # 1018 is also performed by the automatic reset circuit 116h independently, and is surrounded by a broken line because it is independent of the operation of the camera microcomputer 11.

Steps # 1007, # 1008, #
When it is determined in steps 1009 and # 1010 that it is necessary to increase the vibration isolation accuracy, as described above, step # 1 in FIG.
The process proceeds to 019, to wait here until T _2, then step #
Proceed to 1020. Then, in this step # 1020, the camera microcomputer 11 outputs a clock signal to the clock gate 116e via the reset terminal 116i. At this time, the output of the clock signal from the automatic reset circuit 116h has just stopped, and the camera microcomputer 11
Supplies a clock signal to the clock gate 116e instead of the automatic reset circuit 116h, thereby causing the analog processing circuit 116 to continue the offset removal operation.

[0124] In the next step # 1021, and waits until the time T ₃ (e.g., 0.2 seconds from the clock output in step # 1020), the procedure moves to step # 1022. Then, in this step # 1022, the output of the clock is stopped, and this flow ends.

As described above, steps # 1013 to # 1013
When the process proceeds to step 17, the shutter chance is prioritized over the offset removal accuracy of the vibration detection device 19, and step # 10 is performed.
When proceeding from 19 to # 1022, the offset removal accuracy of the vibration detection device 19 is prioritized over the shutter chance, and the offset removal accuracy of the output of the vibration detection device 19 is controlled in accordance with the shooting conditions of the camera. , Which makes it easy to handle.

Here, let us consider a case where the analog processing circuit 116 has no automatic reset circuit.

FIG. 5 is a block diagram showing this configuration.
In this configuration, all the clock gates 116e are controlled by the clock signal from the camera microcomputer 11.

FIGS. 6 and 7 are flow charts in such a case, and are basically the same as FIGS. 3 and 4. However, all steps enclosed by broken lines in FIGS. The dashed line is omitted because the instruction is performed.

In FIG. 4, steps # 1014, # 1
In steps 016 and # 1017, an operation for canceling the clock from the automatic reset circuit is performed. However, in FIG. 7, the clock signal from the camera microcomputer 11 is stopped in step # 1023 because it is not necessary. I have.

Further, in FIG. 4, steps # 1019, # 1019
At 1020, the camera microcomputer 11 performs the complement operation of the clock signal to perform the offset removal operation even after the output of the automatic reset circuit is stopped. However, so that simply performs extension of an output clock signal from the camera microcomputer 11 (until time T ₃₎ in the flow of FIG. 7.

As described above, since the control can be performed easily by the camera microcomputer 11, the automatic reset circuit 116h is provided in the analog processing circuit 116 in FIG. It depends on what you can do. In the case of a device in which a microcomputer is omitted for simplification of the mechanism and cost reduction, or a device using a microcomputer having a low function, the analog processing circuit 116 is used.
Cannot be controlled by the microcomputer. When used in such a device, the automatic offset removal function by the automatic reset circuit becomes extremely convenient. Therefore, in the configuration of FIG. 1, an automatic reset circuit is provided in the analog processing circuit.

(Second Embodiment) In the first embodiment, the vibration detecting device 19 and the analog processing circuit 1
Reference numeral 16 was a separate part. However, both are compact and easy to handle because they are necessary for vibration detection.

FIG. 8 is a block diagram showing a main part of a camera according to a second embodiment of the present invention.
The vibration detection device 19 and the analog processing circuit 116 according to the first embodiment are configured as a vibration detection unit 21 in one unit.

In FIG. 8, the vibration detecting device 19 includes a vibration detecting mechanism 19a and a vibration detecting circuit 19b. For example, in the case of a vibration gyro as a vibration detecting device, the vibration detecting mechanism 19a is a vibrator, and the vibration detecting circuit 19b synchronizes a signal of the Coriolis force detected by the vibrator with an excitation frequency of the vibrator. It is a part that performs signal processing for detecting and converting to angular velocity. Then, the vibration detection circuit section 19b and the analog processing circuit of the first embodiment are integrated into a single package IC, and the vibration detection mechanism section 1 is provided nearby.
9a are arranged to constitute one unit.

A difference from the first embodiment is that a half-press signal (s1 on) of the release button is input to the vibration detection unit 21 from the release button 113.

The automatic reset circuit 116h generates a clock signal slightly after the power is turned on and stops outputting the clock signal for a predetermined time. However, in the second embodiment, the power is turned on. Instead of generating a clock signal in response to the above, when the ON of s1 due to the half-press of the release button 113 is input to the vibration detection unit 21, the automatic reset circuit 116h
The clock signal is input to e for a predetermined time (the vibration detection mechanism 19a and the circuit 19b that processes the signal are turned on to the vibration detection unit 21 and start detecting vibration).

A large vibration may be generated between the operation of turning on the main switch 114 of the camera and the operation of pointing the camera at the subject. In such a case, the vibration for holding the camera makes it possible to accurately remove the offset signal. It becomes difficult.

The half-press of the release button 113 is operated when performing photometry and distance measurement operations on the subject, so that no large vibration generally occurs after this operation. Therefore, the vibration detection is started and stabilized by the main switch 114 of the camera in advance, and the offset signal removing operation is performed by pressing the release button 113 halfway.

That is, since the vibration detection operation has already been stabilized, the signal of the half-press of the release button 113 is input to the vibration detection unit 21 and the automatic reset circuit 11
6h can output a clock signal to the clock gate 116e, and after a lapse of a certain time (for example, 0.2 seconds), the output of the clock signal should be stopped and the offset signal removal operation should be terminated.

Although it has been described above that a large vibration rarely occurs when the release button 113 is half-pressed, the framing of the camera is changed while the release button 113 is half-pressed when performing the prefocus operation.
Large vibration may be input during the offset signal removing operation.

Therefore, in the second embodiment, the offset signal removing operation is started when the release button 113 is half-pressed, and thereafter, the offset signal removing operation is continued until the vibration is reduced to a certain amount.

The camera microcomputer 11 receives a camera shake signal from the vibration detection unit 21. Immediately after the release button 113 is half-pressed, accurate shake information cannot be obtained because the offset signal has not been sufficiently removed, but a relatively large shake caused by the framing operation of the camera can be detected. Therefore, among the signals of the vibration detection unit 21 input to the camera microcomputer 11, a camera shake frequency signal (for example, a signal of 1 to 5 Hz) is separated by a band pass filter or the like, and when the signal is larger than a predetermined amount, the framing operation is performed. , The offset signal removing operation is continued.

Incidentally, such a circuit is provided by the camera microcomputer 11.
Although it can be easily performed by digital signal processing inside the camera microcomputer, it may be configured by a dedicated analog circuit before inputting to the camera microcomputer, or may be provided in the vibration detection unit 21.

FIGS. 9 and 10 are flow charts for explaining the above operation. The difference from FIGS. 3 and 4 is that
In step # 1001, the vibration detection unit 21 is activated, and shake detection is started.
To wait until the release button 113 is half-pressed. When the release button 113 is half-pressed in step # 2001, the process proceeds to step # 1002 to start the internal timer. In this embodiment, step # 1003 is omitted, and the timer is reset. Next step with start #
At 1004, a clock signal is generated from the automatic reset circuit 116h. The subsequent steps up to step # 1012 are the same as those in FIG.

When the output of the clock signal from the automatic clock device 116h is stopped after a lapse of a predetermined time from the clock output in step # 1012, the flow advances to step # 2002 to determine whether or not the shake is large. Proceeding to step # 2003, a clock signal is output from the camera microcomputer 11 to the clock gate 116e via the reset terminal 116i to continue the offset signal removing operation. If the shake is small, the process proceeds to step # 2004. If the clock signal is output from the camera microcomputer 11 in step 2003, the output of the clock signal is stopped.

As can be seen from this flow, the offset signal removing operation is continued until the shake becomes small (until the framing is completed) to prevent the DC cut accuracy from being deteriorated due to the shake.

Similarly, if it is determined in step # 2005 that the shake is large even if the clock output time extended for improving the image stabilization has elapsed in step # 1021 in FIG. 10, the process proceeds to step # 1022. First, it waits until the shake becomes small. Therefore, the offset signal removing operation is continued until the shake becomes small.

As described above, by changing the time of the offset signal removing operation depending on the shake state, the offset signal can be removed accurately.

(Third Embodiment) In the block diagram of FIG. 8, an automatic reset circuit 116h is built in the vibration detecting unit 21. However, the automatic reset circuit 116h can be omitted as in the configuration example of FIG.

FIG. 11 is a block diagram showing a configuration of a main part of a camera according to a third embodiment of the present invention, wherein an automatic reset circuit is omitted from the vibration detecting unit 21.
Also, a signal directly input from the release button 113 to the vibration detection unit 21 is omitted.

The vibration detection unit 21 starts operating when the main switch 114 of the camera is turned on, and starts vibration detection. At this time, the offset removal operation has not yet started. When the half-press signal of the release button 113 is input to the camera microcomputer 11, the camera microcomputer 11 inputs a clock signal to the clock gate 116e via the reset terminal 116i, and the vibration detection unit 21 starts an offset removing operation.

FIGS. 12 to 14 are flow charts for explaining the operation of the vibration detecting unit 21.
9 and 10 are basically the same, and only the differences will be described here.

After the vibration detecting unit 21 is operated in step # 1001, the process proceeds to step # 2006. The elapsed time since the last use of the vibration detecting device 19 is checked, and the time is equal to or longer than a predetermined time (T ₆ ). If not, the process immediately proceeds to step # 1002. On the other hand, if the predetermined time has not elapsed, the process proceeds to step # 2007, and T
_After waiting for ₇ hours, the process proceeds to step # 1002.

When a vibration gyro is used as the vibration detecting device, the following characteristics become problematic.

The vibrating gyroscope requires a relatively long time until its output is stabilized (until the offset component settles). Therefore, before starting the offset removing operation, the vibration gyro is operated in advance to stabilize the output. Therefore, if the time from the end of the previous operation to the start of the next operation of the vibrating gyroscope is short, the time until the output stabilizes is short. Therefore, in the third embodiment, in order to speed up the offset removal operation as much as possible, the offset removal standby time is changed by observing the elapsed time since the last use as in steps # 2006 and # 2007. Like that.

The determination of the elapsed time is based on whether or not the vibration gyro is operated again within a predetermined time (for example, 4 minutes) after the use of the vibration gyro is completed (after the main switch 114 of the camera is turned off). It should be done in.

The configuration in which the clock signal is not output from the camera microcomputer 11 to the clock gate 116e in step # 1004 until the timer elapses at time # ₁ in step # 1003 is also different from FIG.

In FIG. 9, the main switch 114 of the camera
It takes time from turning on the vibration detection unit 21 to activating the vibration detection unit 21 until the release button 113 is half-pressed, and it is considered that the output of the vibration detection device is stable, and the offset is removed immediately after the release button 113 is half-pressed. Had gone.

However, it is conceivable to turn on the main switch 114 of the camera while pressing the release button 113 halfway. Therefore, in the third embodiment, a timer which starts after the main switch 114 is turned on (see FIG. Twelve steps # 1002) correspond to a predetermined time T ₁
Until the time elapses, the process does not proceed to step # 1004.

[0160] Since there is provided a waiting time even step # 2007, T ₁ of the step # 1003, can be set to be shorter than T ₁ of the step # 1003 of Fig.
(The offset elimination operation can be started in a short time when the vibration gyro has just been used last time.) Further, since the clock signal is controlled by the camera microcomputer 11 instead of the automatic reset circuit 116h, FIG. Ten steps # 1014, # 1016, # 1017,
Steps # 1019 and # 1020 are omitted as in the case of FIG.

As described above, since the vibration detection device and the analog processing circuit are constituted by the same unit, the size and the weight are reduced as compared with the DC cut filter having a capacitor and the like shown in FIG. Will improve the accuracy.

(Fourth Embodiment) The analog processing circuit 116 and the vibration detection unit 21 can be applied not only to a still camera but also to a video camera and binoculars having an image stabilizing function. Then, it is desirable to appropriately set the offset removal timing depending on the difference between these devices.

For example, in a still camera, offset removal may be performed by half-pressing a release button to save power, and in a video camera, offset removal may be performed by turning on a main switch for long-term use. However, in the video camera, the timing of starting offset removal (a standby time after the vibration detection device operates) may be delayed, and the time during which offset removal is performed may be extended to perform accurate offset removal ( In the video, the time during which vibration isolation is performed is long.)

FIG. 15 is a block diagram of a camera according to the fourth embodiment of the present invention. The difference from FIG. 11 is that a camera mode switching member 31 is provided.

The camera according to the fourth embodiment has two camera modes, a still camera mode and a video camera mode. In the still camera mode, pressing the release button 113 takes a picture at a predetermined shutter speed. When the camera is in video camera mode, release button 1
Operation 13 starts video shooting.

In the video camera mode, an offset superimposed on the vibration detection unit 21 must be completely removed beforehand in order to perform continuous shooting, or the video screen will fluctuate (malfunction due to the offset signal). Offset removal is automatically started when the main switch 114 is turned on. In the still camera mode, it is preferable to perform offset removal after holding the camera for photographing. 21 is configured to start offset removal.

FIGS. 16 to 18 are flowcharts for realizing the above operation. The difference from the flowcharts of FIGS. 12 to 14 is that step # 3001 is provided. Only this flow will be described. I do.

In step # 3001, it is determined whether the mode of the camera is the still mode or the video mode. If the mode is the still mode, the flow advances to step # 2001 to wait for the release button 113 to be half-pressed. Button 112 is half-pressed and main switch 1
When the elapsed time T ₁ or from 14 on, the camera microcomputer 11 causes start offset removing operation in the vibration detection unit 21.

If it is determined in step # 3001 that the video mode has been selected, the process proceeds to step # 20.
01 proceeds to a step # 1003 is skipped, the elapsed time T ₁ from the closing of the main switch 114, the camera microcomputer 11 independently of the operation of the release button 113 causes start offset removing operation in the vibration detection unit 21.

In the video mode in which the image recording time is long as described above, the vibration detection unit 2 is set in advance before the start of image recording.
Since the offset component superimposed on the signal No. 1 is removed, it is possible to suppress the fluctuation of the image caused by the offset component during the image recording. Further, in the still mode, since the image fluctuation does not significantly affect the image performance because the recording time is short, the offset is removed from the half-press of the release button 113, thereby not only saving power but also saving power. Also, it is possible to prevent a large shake caused by the handling of the camera which has occurred up to that time from affecting the offset removal.

(Embodiment 5) Among recent optical instruments, interchangeable lenses that can be attached to both the body of a still camera and the body of a video camera have been commercialized. When an anti-shake system is mounted on such an interchangeable lens, it is preferable to change the control method of the anti-shake system depending on whether it is a still body or a video body.

As described above, in a video camera,
This is because it is necessary to increase the offset component removal accuracy in order to perform long-time image recording. However, a certain amount of time is required for the image stabilization system to stabilize (it does not matter to the photo opportunity).

Therefore, when an interchangeable lens equipped with an anti-vibration system is mounted on a video camera, it takes a longer time to start offset removal (a standby time until the output of the vibration detecting device is stabilized), and further removes the offset. The operation is performed for a longer time to increase the offset removal accuracy.

FIG. 19 is a block diagram according to a fifth embodiment of the present invention for realizing the above. In FIG.
A microcomputer that determines whether the body to which the body determination circuit 32 is mounted is a still camera body or a video camera body (the lens microcomputer and the camera microcomputer are collectively described)
33. The microcomputer 33 changes the offset removal time and timing of the vibration detection unit 21 based on this signal.

FIGS. 20 to 22 are flowcharts for explaining the above. The difference from the flowcharts of FIGS. 12 to 14 is that step # 3002 is provided, and only this point will be described.

At step # 3002 in FIG. 20,
It is determined whether the body to be attached is a still camera body or a video camera body. If the body is a still camera body, the process proceeds to step # 2001, and waits for the release button 113 to be half-pressed. It is made, and, when the elapsed time T ₁ or more from the closing of the main switch 114, the microcomputer 32 is the vibration detection unit 2
1 starts the offset removing operation. When the video camera body is mounted, step # 3003
And the standby time T ₁ from the start of the vibration detection unit 21 when the main switch 114 is turned on to the start of offset removal of the signal, and the time T to continue offset removal.
_{2. In order to} improve the image stabilization accuracy, the time T ₃ for continuing the offset removal operation is further increased (T ₈ , T ₉ ,
T _10). Then, the process proceeds to step # 2001.

As described above, when the video camera body is mounted, the timing of starting offset removal and the operating time are changed to improve the accuracy of offset removal, and when the still camera body is mounted, a chance to take a photo is reduced. By giving priority to the configuration, an easy-to-handle anti-vibration system was achieved.

(Correspondence between Invention and Embodiment) In each of the above embodiments, the vibration detecting device 19 and the vibration detecting mechanism 1
9a, the vibration detecting circuit section 19b is used as the vibration detecting means of the present invention, and the analog processing circuit 116 and its corresponding parts are used as the offset signal removing means of the present invention.
6i is an input terminal of the present invention, and an automatic reset circuit 116h
The camera microcomputer 11 and the microcomputer 33 correspond to the signal control means and the operation control means of the present invention, and the camera mode switching member 31 corresponds to the camera mode switching member of the present invention.

[0179]

As described above, according to the first and third or second and third aspects of the present invention, the size and weight of the apparatus are reduced, and the state of the anti-vibration control device and the anti-vibration control device are reduced. An object of the present invention is to provide an anti-vibration control device capable of removing an offset signal superimposed on a vibration detection signal in accordance with the state of a mounted device and outputting a highly accurate vibration detection signal.

Further, claims 4, 5, 6 and 7, 8 and 9
According to the tenth aspect of the present invention, it is possible to provide an optical device capable of removing an offset signal superimposed on a vibration detection signal according to a state of the optical device and outputting a highly accurate vibration detection signal. is there.

Further, according to the present invention described in claim 11,
An object of the present invention is to provide an interchangeable lens capable of removing an offset signal superimposed on a vibration detection signal in accordance with a state in which the interchangeable lens is used and outputting a highly accurate vibration detection signal.

Further, according to the present invention, it is possible to provide an anti-vibration control device capable of outputting a highly accurate vibration detection signal.

According to the present invention, an offset signal to be superimposed on a vibration detection signal is removed in accordance with a use state of a device on which the anti-vibration control device is mounted. Accordingly, it is possible to provide an anti-vibration control device capable of outputting a highly accurate vibration detection signal.

According to the present invention, an offset signal to be superimposed on a vibration detection signal in accordance with the state of the anti-vibration control device and the use state of a device on which the anti-vibration control device is mounted. It is possible to provide an anti-vibration control device capable of removing vibration and outputting a highly accurate vibration detection signal.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a main part of a camera according to a first embodiment of the present invention.

FIG. 2 is a timing chart from the start of shake detection to the removal of an offset component in the first embodiment of the present invention.

FIG. 3 is a flowchart showing a part of the operation of the camera according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing a continuation of the operation in FIG. 3;

FIG. 5 is a block diagram showing another configuration example of the camera according to the first embodiment of the present invention.

FIG. 6 is a flowchart showing a part of the operation in the configuration of FIG. 5;

FIG. 7 is a flowchart showing a continuation of the operation in FIG. 6;

FIG. 8 is a block diagram showing a configuration of a main part of a camera according to a second embodiment of the present invention.

FIG. 9 is a flowchart showing a part of the operation of the camera according to the second embodiment of the present invention.

FIG. 10 is a flowchart showing a continuation of the operation in FIG. 9;

FIG. 11 is a block diagram showing a configuration of a main part of a camera according to a third embodiment of the present invention.

FIG. 12 is a flowchart showing a part of the operation of the camera according to the third embodiment of the present invention.

FIG. 13 is a flowchart showing a continuation of the operation in FIG. 12;

FIG. 14 is a flowchart showing a continuation of the operation in FIG. 12 or 13;

FIG. 15 is a block diagram showing a configuration of a main part of a camera according to a fourth embodiment of the present invention.

FIG. 16 is a flowchart showing a part of the operation of the camera according to the fourth embodiment of the present invention.

FIG. 17 is a flowchart showing a continuation of the operation in FIG. 16;

FIG. 18 is a flowchart showing a continuation of the operation in FIG. 16 or 17;

FIG. 19 is a block diagram showing a configuration of a main part of a camera according to a fifth embodiment of the present invention.

FIG. 20 is a flowchart showing a part of the operation of the camera according to the fifth embodiment of the present invention.

FIG. 21 is a flowchart showing a continuation of the operation in FIG. 20;

FIG. 22 is a flowchart showing a continuation of the operation in FIG. 20 or FIG. 21;

FIG. 23 is an external view of a conventional compact camera having a vibration isolation system.

24 is a perspective view showing an internal mechanism of the camera shown in FIG.

FIG. 25 is a block diagram illustrating an internal configuration of the arithmetic device of FIG. 24;

26 is a front view of a correction unit provided in the camera of FIG.

27 is a diagram viewed from the direction of arrow B in FIG. 26 and a diagram showing a cross section taken along AA.

FIG. 28 is a perspective view of a correction unit shown in FIG. 26;

FIG. 29 is a circuit diagram showing a configuration of the DC cut filter shown in FIG.

FIG. 30 is a diagram illustrating frequency characteristics of the DC cut filter having the configuration of FIG. 29;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Camera microcomputer 14 Shutter drive device 15 Zoom operation member 16 Zoom drive device 17 Flash device 18 Anti-vibration switch 19 Vibration detection device 21 Vibration detection unit 31 Camera mode switching member 32 Body discriminating circuit 33 Microcomputer 110 Correction means 111 Strobe mode input member 112 Shooting mode input member 113 Release button 114 Main switch 115 AF drive

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/781 H04N 5/91 5/91

Claims (24)

[Claims] 1. A vibration detection means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detection means, and the calculated value is subtracted from the vibration detection signal. An offset signal removing unit that removes an offset signal superimposed on the vibration detection signal,
A vibration control device in which the vibration detecting means and the offset signal removing means are constituted by the same unit, and a signal for controlling the predetermined period is input from outside of the vibration control device constituting the unit. An anti-vibration control device, comprising: 2. A vibration detection means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detection means, and the calculated value is subtracted from the vibration detection signal. An offset signal removing unit that removes an offset signal superimposed on the vibration detection signal,
An anti-vibration control device in which the vibration detection means and the offset signal removing means are constituted by the same unit, wherein a signal for controlling the predetermined period is generated inside the anti-vibration control device forming the unit; A signal generation means for performing the predetermined period, and an input terminal for inputting a signal for controlling the predetermined period from outside of the image stabilization control device. 3. The method according to claim 2, wherein the offset signal removing unit includes at least a vibration detection signal from the vibration detecting unit, or
A clock gate to which a signal obtained by amplifying the vibration detection signal is input; a counter for increasing / decreasing an output signal of the D / A converter based on a signal from the clock gate; A differential device for subtracting a detection signal, wherein the clock gate operates based on a signal for controlling the predetermined period, which is input from the outside or generated internally. The anti-vibration control device according to claim 1 or 2, wherein 4. A vibration detecting means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the offset signal removing unit responds to a main power of the optical device being turned on, An optical apparatus for starting an operation of removing an offset signal superimposed on a vibration detection signal. 5. A vibration detecting means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the offset signal removing unit responds to an operation for causing the optical device to perform distance measurement or photometry. And starting an operation of removing an offset signal superimposed on the vibration detection signal. 6. A vibration detecting means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An optical device having an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the control is performed such that the predetermined period does not overlap with a drive timing of an actuator mounted on the optical device. Optical equipment characterized by the following. 7. The drive timing of the actuator is when the optical system of the optical device is driven from the retracted state to the extended state, or when the variable magnification drive or the focus adjustment drive of the optical system is performed. 7. The optical device according to claim 6, wherein time is elapsed. 8. A vibration detecting means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the predetermined period is set to a photographing focal length, an exposure time, a photographing mode, and a photographing mode of the optical device. An optical device comprising a control unit for a predetermined period that is changed according to at least one of use postures. 9. The photographing apparatus according to claim 1, wherein the predetermined time control means includes: a photographing optical system having a long focal length, a photographing exposure time being long, a photographing mode requiring photograph accuracy being selected, and a posture in use of the photographing apparatus. 9. The anti-vibration control device according to claim 8, wherein the predetermined period is lengthened when the posture is different from the posture frequently used. 10. A vibration detecting means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An optical apparatus having an offset signal removing unit for removing an offset signal superimposed on the vibration detection signal, and a camera mode switching member for switching between a still camera mode and a video camera mode, wherein the optical device is selected by the camera mode switching member. An optical apparatus comprising a predetermined period control unit that changes the predetermined period according to a mode. 11. A vibration detecting means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An interchangeable lens having an offset signal removing means for removing an offset signal superimposed on the vibration detection signal, the interchangeable lens being used by being attached to any of a still camera body and a video camera body. An interchangeable lens comprising a predetermined period control means for changing the predetermined period depending on whether the lens is attached to a camera or a video camera. 12. A vibration detecting means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An anti-shake control device having an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the vibration detection signal from the vibration detection unit indicates that the vibration is small, An image stabilization control device comprising operation control means for operating an offset signal removal means. 13. The operation control unit according to claim 1, wherein the operation member is operated when an operation member of a device on which the anti-vibration control device is mounted is operated.
13. The image stabilizing control device according to claim 12, wherein the offset signal removing unit is not operated. 14. An apparatus on which the image stabilization control device is mounted is a photographing device, and the operation control means includes an operation member for changing a photographing state among operation members mounted on the photographing device. 14. The anti-shake control device according to claim 13, wherein the offset signal removing means is not operated when the operation is being performed. 15. The image stabilizing apparatus according to claim 12, wherein said operation control means operates said offset signal removing means when said vibration detection signal includes a signal of a predetermined frequency or more in a predetermined amount. Control device. 16. The predetermined frequency is 1 Hz to 5 which is relatively low in a frequency band of camera shake applied to the optical apparatus.
The anti-vibration control device according to claim 15, wherein the frequency is Hz. 17. A vibration detecting means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detecting means, and the calculated value is subtracted from the vibration detection signal. An offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the offset signal removing unit after a first time has elapsed since the vibration detecting unit started operating. An anti-vibration control device, comprising an operation control means for operating the device. 18. The image stabilizing control device is mounted on an optical device, and the operation control means changes the first time in accordance with an ambient temperature when the optical device is used. 18. The anti-vibration control device according to item 17. 19. The anti-vibration control device according to claim 18, wherein the operation control means extends the first time when an ambient temperature during use of the optical device is low. 20. The anti-vibration control device according to claim 17, wherein the operation control means changes the first time based on an elapsed time since the operation of the vibration detection means was stopped last time. . 21. The method according to claim 12, wherein the operation control means extends the first time when a time interval from when the vibration detection means is stopped last time to when the vibration detection means is restarted this time is a predetermined time or more. The anti-vibration control device according to claim 20, wherein 22. A vibration detection means for detecting vibration, and an offset signal component is calculated for a predetermined period based on a vibration detection signal from the vibration detection means, and the calculated value is subtracted from the vibration detection signal. And an offset signal removing unit that removes an offset signal superimposed on the vibration detection signal, wherein the offset signal removing unit is operated until power supplied to the vibration detection unit is stabilized. An anti-vibration control device having operation control means. 23. The image stabilizing control device is mounted on a photographing device, and the operation control means continues the operation of the offset signal removing means while power is stored in a main capacitor of a flash means provided in the photographing device. The anti-vibration control device according to claim 22, wherein the control is performed. 24. The apparatus according to claim 23, wherein the operation control means stops the operation of the offset signal removing means after a lapse of a predetermined time from the end of the accumulation of power in the main capacitor of the flash means. Anti-vibration control device.