JPH10339892A - Camera and device provided with vibration-proof function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent image deterioration from being caused by the malfunction of a vibration-proof device occurring because a camera is shaken to such an extent that shake correction is impossible by controlling the vibration-proof device according to the difference of operation time between an operation means for starting photographing preparation action and an operation means for starting photographing action. SOLUTION: The vibration-proof device is controlled according to the difference of the operation time between the operation means for starting the photographing preparation action and the operation means for starting the photographing action. In this camera, an s1 signal for starting the photographing preparation action, that is, photometry and range-finding is generated by half-depressing a release operation member 303, and an s2 signal for starting the photographing action(exposing action) is generated by fully depressing the member 303. Whether the shake having different characteristic is caused by the strong operation of the member 303 is detected according to an operation interval between the half depressing and the full depressing of the member 303, that is, a time interval between the s1 signal and the s2 signal so as not to perform the shake correction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a camera having a vibration control device and a device with a vibration control function.

[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 appropriately processes the output for camera shake correction. This can be done by mounting it on a camera. Then, based on this detection information, the correction optical device for decentering the photographing optical axis is driven to suppress image blur.

The details of an anti-shake system having a shake detection sensor, a correction optical device, and the like are disclosed in Japanese Patent Application Laid-Open No. 2-58037. The outline will be described with reference to FIG.

FIG. 27A is a perspective view of a compact camera equipped with an anti-vibration system. Reference numeral 801 denotes a cover of the camera, 802 denotes a photographing lens of the camera, and is protected by a lens barrier when photographing is not performed. (In FIG. 27A, the lens barrier is retracted and cannot be seen because of the shooting state.)
Reference numeral 803 denotes a main switch of the camera.
Is a photographable state in which the image stabilizing system is turned on. When the main switch 803 is set to the index "OFF", photographing is disabled, and the main switch 803 is set to the sports mode 804 (high-speed shutter mode) or the strobe mode 805. When they are matched, the mode is switched to a photographable state in which the image stabilizing system is turned off (since the image stabilizing system is not required in such a mode). Reference numeral 806 denotes a release button. When the release button 806 is pressed, the camera performs photometry and distance measurement, starts blur correction after focusing, and exposes the film. Reference numeral 807 denotes a strobe light emitting unit that automatically emits light when the subject is dark or forcibly emits light.

FIG. 27 (b) is an internal perspective view of FIG. 27 (a), wherein 808 is a camera body, and 809 is a correction lens 81.
A correction mechanism (a part of the correction optical device that actually drives the vibration correction) by freely driving the X and Y directions in the figure to perform the vibration correction. Reference numerals 811p and 811y denote vibrations 81 in the pitch direction, respectively.
This is a shake detection sensor that detects a shake 812y in the 2p, yaw direction. Reference numeral 813 denotes the above-described lens barrier, which is shown in FIG.
It opens and closes in conjunction with the knob 814 shown in FIG. The knob 814 is connected to the main switch 803 as shown in FIG.
When the main switch 803 is operated, the knob 814 is also pressed and the lens barrier 813 is opened. The lens barrier 813 mechanically locks the correction mechanism 809 when in the closed state, and prevents the correction mechanism 809 from being violently damaged when not photographing, such as when carrying the camera.

[0010]

However, the anti-vibration system provided in the above-mentioned conventional camera is a system for suppressing the vibration applied to the camera, but the vibration applied to the camera has a frequency of 1 Hz to 10 Hz as described above. In addition to camera shake, there are peculiar shakes when operating the camera (for example, a release operation and a zoom operation), and no measures have been taken against such shakes. For this reason, it was necessary to take measures against not only hand shake but also other disturbance shake.

(Purpose of the Invention) A first object of the present invention is to prevent an image stabilizing device from malfunctioning due to a large vibration that cannot be corrected. It is an object of the present invention to provide a camera that can prevent such a situation.

A second object of the present invention is to provide a camera which can notify that the shake correction is impossible and prompt the user to retake the image and to pay attention to holding the camera. .

A third object of the present invention is to provide a camera capable of correcting the shake even if a large shake is applied and preventing image deterioration.

A fourth object of the present invention is to provide a camera capable of preventing an image from being deteriorated due to a large shake that cannot be corrected so as to make it impossible to perform proper photographing. It is assumed that.

A fifth object of the present invention is to prevent a photographer from taking a photograph at an undesired photographing opportunity or to set a photographing prohibited state due to careless release of the photographing prohibited state. It is an object of the present invention to provide a camera that can prevent a situation where a photographer operates the operating means more forcibly without noticing the camera, thereby causing a large shake and causing image deterioration.

A sixth object of the present invention is to prevent a vibration isolator from malfunctioning due to a large vibration that cannot be corrected and impairing the function of the device. It is an object of the present invention to provide a device with an anti-vibration function.

[0017]

In order to achieve the first object, according to the present invention, there is provided an image stabilizing apparatus for correcting a shake, and a first apparatus for starting a photographing preparation operation. And a second operation means for initiating a photographing operation, wherein the vibration control device controls the vibration control device based on an operation time difference between the first operation means and the second operation means. This is a camera having control means.

Specifically, the operation and non-operation of the shake correction by the vibration isolator are controlled by the operation time difference between the first operation means and the second operation means. More specifically, the first operation means and the second operation means are controlled. When the operation time difference is shorter than the predetermined time, such as when the second operation means is continuously operated, since a large disturbance vibration often occurs such that the vibration correction cannot be performed, the vibration correction is not performed. Or shake correction is interrupted.

In order to achieve the second object,
The present invention according to Claims 1, 5 and 6, further comprises display means for displaying a state of the vibration isolator according to an operation time difference between the first operation means and the second operation means, wherein the display means is adapted to perform the operation. When the time difference is within a predetermined time, the camera performs a camera shake warning display.

More specifically, when the operation time difference is shorter than a predetermined time, such as when the first operating means and the second operating means are operated successively, a large vibration that cannot be corrected. Is often added, a camera shake warning display is performed instead of a normal image stabilization display (display of a shake amount or the like).

In order to achieve the third object,
According to the present invention, the first operating means and the second operating means are provided.
When the operation time difference of the operation means is within a predetermined time, the camera changes the operation mode of shake correction by the vibration isolator.

Specifically, when the operation time difference is within a predetermined time, the shake is obtained in advance based on the shake caused to the camera by the operation state of the first operating means and the second operating means, and is stored and shaken. The shake correction may be performed with the predicted target value of the correction, and the predicted target value may be further changed from the focal length of the camera, the shutter speed, or the release time lag (from the start of the shooting operation to the start of the actual exposure to the recording medium). (Delay time), and shake correction is performed.

In order to achieve the fourth object,
The present invention according to claims 14 to 16, is a camera having a first operating means for starting a shooting preparation operation and a second operating means for starting a shooting operation, wherein
The operation time difference between the operation means of the above and the second operation means,
The camera has a photographing sequence changing means for changing the photographing sequence.

More specifically, if the operation time difference between the first operation means and the second operation means is within a predetermined time, a large disturbance vibration that cannot be corrected is often generated. The photographing sequence is changed so that the photographing operation by the operation of the second operating means is prohibited, or the start of the photographing operation by the operation of the second operating means is delayed for a predetermined time.

In order to achieve the fifth object,
The present invention according to claims 17 and 18 has a vibration isolator for correcting shake, a first operation means for starting a shooting preparation operation, and a second operation means for starting a shooting operation. In the camera, even if the second operation means is operated, the photographing operation is prohibited unless the vibration isolator is properly operated, and the operation of the first and second operation means is temporarily stopped and the operation is stopped again. Until the operation of the first operation unit is performed, the camera has a photographing prohibition unit that holds the prohibition state of the photographing operation.

Specifically, the first and second operating means are two
A step-type switch member, and a photographing prohibiting unit is configured to perform photographing even if the second operation unit is pressed following the first operation unit unless the vibration isolator is properly operated. The operation is prohibited, and the prohibiting state of the photographing operation is maintained until the pressing operation of the first operating means is stopped and the pressing operation of the first operating means is performed again.

In order to achieve the sixth object,
According to a nineteenth aspect of the present invention, there is provided an anti-vibration device for correcting a shake, a first operation means for starting a predetermined operation, and a state in which the first operation means is operated. A device having a vibration-proof function having a second operation means for starting the operation of the first operation means and the second operation means;
A device with a vibration-proof function having a vibration-proof control means for controlling the vibration-proof device according to the operation time difference of the operation means.

[0028]

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

FIG. 1 is a structural diagram of a vibrating body of a vibrating gyroscope which is a shake detection sensor according to an embodiment of the present invention.

In the figure, reference numeral 11 denotes a metal vibrator, 1
Reference numeral 2 denotes a permanent magnet provided near the tip of the vibrator 11;
Reference numerals 3 and 14 denote piezoelectric elements provided in the vicinity of the fixed end of the vibrator 11, reference numerals 15 and 16 denote lead wires for extracting electric charges generated on surface electrodes of the piezoelectric elements 13 and 14, and reference numeral 17 denotes a vibrator 11
A ground wire (not shown) to which the vibrator 11 is fixed, a holding member 19 for holding the vibrator 11 with the pedestal 18, and a permanent magnet 12 A coil 21 for generating a driving force by Lorentz force is a photoreflector 21 for optically detecting a vibration displacement of the vibrator 11 and the permanent magnet 12 excited by the coil 20. Note that the normal position of the coil 20 is indicated by a two-dot chain line in the figure.

The excitation piece 11a and the detection piece 11b of the vibrator 11
Are connected so as to be orthogonal to each other by a flange 11c and are integrally formed. The working method is desirably performed collectively by a forging press, but may be performed by metal injection or shaving.

Next, a method of assembling the vibrator 11 to the pedestal 18 will be described.

The piezoelectric element 13 has an attachment portion 1 for the lead wire 15.
3a is formed to extend to the fixed portion 11d side of the vibrator 11. Similarly, for the piezoelectric element 14, the lead wire 1
6 is fixed to the fixed portion 1 of the vibrator 11.
It is formed to extend to the 1d side. This mounting portion 13a,
14a and the pedestal 1 to escape the leads 15 and 16
8 has a groove 18a, and the holding member 19 has a groove 19a.

The vibrator 1 is provided on both sides of the groove 18a of the pedestal 18.
A pressing surface 18b that is in contact with the first fixed portion 11d is formed, and the pressing member 18 also has a pressing surface 18b
A pressurizing surface (not shown) having the same shape as that of FIG.

In the state shown in FIG. 1, three screws from the holding member 19 side are fastened to the screw holes 18c formed in the pedestal 18 through the holes 19b and 11e, whereby the fixing portion 11d of the vibrator 11 is held. The lead wires 15 and 16 are drawn out to the back side of the pedestal 18 through the hole 18d, and are integrally formed.

As described above, the mounting portions 13a and 14a of the piezoelectric elements 13 and 14 and the leads 15 and 16 are structured so as to be sunk inside the fixed ends, so that the leads 15 and 1 are formed.
6 can be prevented from adversely affecting the vibration of the vibrator 11.

Next, the principle of operation of the shake detection sensor having the above configuration will be described.

FIG. 2 is a block diagram showing the configuration of a circuit for performing excitation control and processing of a detection signal of the vibrating body of FIG. 1, that is, the circuit configuration of a vibrating gyroscope. is there.

In FIG. 2, a vibration displacement signal in the y direction (excitation direction) in FIG. 1 of the excitation piece 11a of the vibrator 11 detected by the photo reflector 21 is input to an amplification circuit 22 and amplified there. Stage bandpass filter 23
, A signal in the vicinity of the resonance frequency of the excitation piece 11 a is extracted, and is adjusted by the phase shift circuit 24 so that the phase of the input signal of the coil 20 becomes the same. Then, the AGC circuit 25 adjusts the amplitude so that the output signal of the phase shift circuit 24 becomes an input signal that generates Lorentz force such that the excitation amplitude stably excites at a constant amplitude. The coil 2
0 is supplied with the input signal. The current flowing through the coil 20 is opposite to the z-axis direction in the left and right winding coils when viewed from the front of the x-axis in FIG. Therefore, if the magnetization directions of the left and right permanent magnets 12 are set to be opposite to each other with respect to the x-axis direction, the excitation force due to the Lorentz force in the same direction acts on both the permanent magnets 12 with respect to the y-axis direction. The amplitude is magnified.

Thus, a positive feedback loop is formed, and the excitation piece 11a oscillates at a constant amplitude in the y-axis direction.

In this state, as shown in FIG.
When a vibration of angular velocity Ω is applied around the z-axis through the pedestal 18, Coriolis force proportional to the mass, the excitation velocity and the angular velocity Ω is applied to the excitation piece 11 a, and particularly to the magnet 12 where the mass is concentrated, in the x-axis direction (detection ), This Coriolis force is transmitted to the detecting piece 11b through the flange 11c,
b is distorted in the x-axis direction. At this time, due to the bending strain applied to the piezoelectric elements 13 and 14 provided in the vicinity of the fixed end of the detection piece 11b, charges proportional to the bending strain are generated on the surface electrode. By extracting this as a signal, the angular velocity Ω applied around the Z axis is obtained.

Next, a signal processing process for obtaining the angular velocity Ω applied around the Z axis from the electric charge (voltage) generated on the surface electrodes of the piezoelectric elements 13 and 14 will be described.

The bending strain applied to the piezoelectric elements 13 and 14 is as follows:
When one is in the compression direction and the other is in the tension direction, the voltages generated on the respective surface electrodes have opposite phases to each other, and FIG.
As shown in (1), the output can be doubled by taking the differential by the differential circuit 29 after being amplified by the amplifier circuits 27 and 28, respectively. This output signal is an AM wave whose frequency is an excitation frequency and whose amplitude is modulated by Coriolis force (angular velocity). Therefore, after the bandpass filter 30 cuts noise components in bands other than the signal near the excitation frequency, the output signal (excitation detection signal) of the photoreflector 21 via the amplifier circuit 22 and the bandpass filter 23 is converted by the phase shift circuit 32. The phase shift is adjusted, and this is used as a reference signal. Synchronous detection is performed by a synchronous detection circuit 31, and the smoothing circuit 3
By performing the smoothing by 3, it is possible to obtain a demodulated signal of the angular velocity Ω applied around the Z axis.

At this time, the phase shift circuit 32 performs detection so that the null signal generated by excitation superimposed on the output signal of the band-pass filter 30 is maximized or minimized.
Is adjusted by a variable resistor or the like, so that the positive and negative areas of the null signal in one detected section are always equal. Therefore, even if the amplitude of the null signal fluctuates, the output signal of the smoothing circuit 33 is not changed. Does not show this effect. That is, a highly accurate and stable angular velocity signal can be obtained. Further, by integrating the output signal of the smoothing circuit 33 by the integration circuit 34, an angular displacement signal (shake angle) can be obtained.

FIG. 3 is a perspective view showing a configuration of a finder display device of a camera according to the present embodiment. The finder display device realizes a vibration-proof gyro having the configuration shown in FIGS. It is provided as one of the constituent elements for causing this.

In the figure, reference numeral 41 denotes a light source such as an LED, and reference numeral 42 denotes a mask provided with two parallel and elongate transmission portions at substantially the center. Reference numeral 43 denotes a pitch shake detection sensor having substantially the same structure as that shown in FIG. 1 for detecting a shake in the pitch direction of the camera (meaning a vertical direction when the camera is held at a normal position). Reference numeral 43 denotes a fixing portion 43a for fixing to a ground plate (not shown) with screws or the like, a reflecting portion 43b having a mirror-finished portion near the tip of the vibrator, and a piezoelectric portion affixed near the base of the vibrator for detecting Coriolis force. The element 43c (the shake signal in the pitch direction obtained here is used as one of control signals for shake correction by a correction optical device described later), a magnet 43d attached to both surfaces of the vibrator, and the magnet 43d And a position detection sensor 43f such as a photoreflector for detecting the vibration position of the vibrator. When passing a predetermined current to the vibrator magnet 43d is stuck to vibrate in the vertical direction of the camera at a predetermined frequency. Note that the mask 42 is arranged such that the longitudinal direction of the transmitting portion is perpendicular to the longitudinal direction of the vibrator of the pitch shake detection sensor 43.

Reference numeral 44 denotes a yaw shake detecting sensor for detecting a shake in the yaw direction of the camera (meaning a horizontal direction when the camera is held at a normal position) and having a structure substantially similar to that of FIG. A shake detection sensor 44 is provided with a fixing portion 44a for fixing to a ground plate (not shown) with a screw or the like. Reflector 44, which is shielded at both ends
b, a piezoelectric element 44c affixed near the base of the vibrator for detecting Coriolis force (a yaw direction shake signal obtained here is one of control signals for shake correction by a correction optical device described later). Used), a magnet 44d affixed to both surfaces of the vibrator, a coil 44e fixed to a ground plate (not shown) at a position near the magnet 44d, and a position detection sensor 44f such as a photo reflector for detecting the vibration position of the vibrator. When a predetermined current is applied to the coil 44e, the vibrator to which the magnet 44d is attached vibrates at a predetermined frequency in the optical axis direction of the camera. still,
The longitudinal direction of the reflecting portion 44b is set to be perpendicular to the longitudinal direction of the transmitting portion of the mask 42.

Reference numeral 45 denotes a reflecting portion 43b of the pitch shake detecting sensor 43 for converting an image formed by the light source 41 and the mask 42.
An imaging lens for forming an image in the vicinity of the reflecting portion 44b of the yaw shake detecting sensor 44 through the lens, and an image forming lens 46 for forming an optical image of the light source reflected by the reflecting portion 44b near the finder image forming surface. It is an image lens. 47 is an objective lens, 48
Is a variable power lens, 49 is a half mirror, 50 is a field frame near the viewfinder image forming plane, 51 is a prism, 52 is an eyepiece, and 52 is an eyepiece.
A real image zoom finder system is configured by the above.

As the light from the light source 41 passes through the mask 42, two elongated parallel line images are generated. The light image of the light source passes through the imaging lens 45, is reflected by the reflection portion 43b of the pitch shake detection sensor 43, and forms an image near the reflection portion 44b of the yaw shake detection sensor 44. Here, the two elongated parallel line images are reflected by being limited to a predetermined length by the mirror-finished width of the reflecting portion 44b, pass through the imaging lens 46 and the half mirror 49, and form near the finder imaging surface. Image. This image becomes an image stabilization index 53 described later.

The photographer can observe the subject by superimposing the anti-vibration index 53 on the subject using the half mirror 49.

When the pitch vibration detection sensor 43 is excited, the position and angle of the reflection portion 43b in the pitch direction change. Therefore, when the light source 41 is continuously lit, the light image (parallel line image) of the light source is reflected by the reflection portion 43b. The image formation position at 44b and the image formation position on the finder image formation plane change, and the image stabilization index 53 swings in the pitch direction (up and down direction).

The angle of the bent surface of the reflecting portion 44b is set so that the light image of the light source is always formed near the surface of the reflecting portion 44b even when the pitch shake detection sensor 43 is excited. ing.

When the yaw shake detection sensor 44 is excited, the position of the yaw-direction reflecting portion 44b changes (vibrates in the length direction of the parallel line image). The reflection range of the image (parallel line image) changes, and the anti-vibration index 53 appears to swing in the yaw direction (left-right direction).

FIG. 4 is an explanatory diagram of the blink timing of the light source 41 shown in FIG.

In the figure, reference numeral 61 denotes a position detecting sensor 43 for detecting the position of the vibrator of the pitch deflection detecting sensor 43.
The pitch index position output calculated by converting the output of f into a deflection angle in the pitch direction from the relationship with the display position of the anti-vibration index 53, and 62 is a position at which the yaw deflection detection sensor 44 detects the position of the transducer. The output of the detection sensor 44f is used as the vibration isolation index 5
3 is a yaw index position output calculated by converting the yaw direction into a yaw angle based on the relationship with the display position, 63 is a pitch direction yaw angle output calculated from the output of the pitch shake detection sensor 43, and 64 is a yaw direction output. The yaw direction shake angle output 65 calculated from the output of the shake detection sensor 44 is the light emission timing of the light source 41.

FIG. 4 shows 1/30 second when the pitch vibration detection sensor 43 is excited at a frequency of 300 Hz and the yaw vibration detection sensor 44 is excited at a frequency of 330 Hz, and as shown in FIG. The vibration of the yaw index position output 62 is 1 while the index position output 61 vibrates 10 times.
One time.

Here, the intersection of the pitch index position output 61 and the pitch angle deflection angle output 63 is determined when the pitch index position output 61 has a positive inclination (or may be negative), but not when either of them is inclined. And the display position of the anti-vibration index 53 caused by the response delay of the light emission timing of the light source 41 causes the display to be blurred and is not appropriate), and the light source 41 emits light at that moment. Although the anti-vibration index 53 is moved and displayed (in the direction opposite to the shake), the yaw direction does not always match.

Therefore, at the moment of each intersection (the intersection of the pitch index position output 61 and the pitch direction deflection angle output 63), when the yaw index position output 62 and the yaw direction deflection angle output 64 are within a predetermined value. When the light source 21 is caused to emit light (light emission timing indicated by 65), the anti-vibration index 53 according to the shake in the pitch direction and the yaw direction (in the direction opposite to the shake).
Is moved and displayed.

As described above, the pitch index position output 61 and the yaw index position output 62 are shifted in frequency at a ratio of "10:11", and at least once every tenth of the pitch direction vibrations (the yaw direction vibrations). The light emission timing occurs once every eleven times (the position of the image stabilization index 53 is a position (in the two-dimensional direction) corresponding to the shake in the finder screen). Therefore, since the light source 41 is turned on once every 1/30 second, the above-mentioned operation is repeated, and the afterimage effect (light that blinks in the human eye for 1/30 second or more is continuously turned on by the afterimage. ), It appears to the photographer that the anti-vibration index 53 moves continuously (in a direction opposite to the shake) in accordance with the shake.

FIG. 5 is a viewfinder view of a camera provided with the finder display device shown in FIG. 3, and FIG.
Represents the initial state when the image stabilization system is turned on. FIG. 5B shows the camera shakes in the lower right direction in the figure, and the image stabilization index 53 moves in a direction opposite to the shake (upper left direction). Indicates the displayed state.

In the figure, reference numeral 71 denotes a finder visual field range, reference numeral 72 denotes a finder image of a subject, and reference numeral 73 denotes a finder visual field range before the camera shakes.

As shown in FIG. 5A, the anti-vibration index 53 is initially displayed at substantially the center of the finder visual field range 71, and the camera has swung downward and to the right as shown in FIG. 5B. In this case, the image stabilization index 53 moves in the upper left direction, which is the direction opposite to the shake, and is displayed substantially at the center of the finder visual field range 73 before the camera shakes, thereby indicating the image stabilization effect.

As described above, the anti-shake index 53 in the viewfinder field of view is continuously moved and displayed so as to correct the shake, so that the photographer can intuitively recognize the anti-shake effect, and Since the shake detection sensor also serves as an actuator for image stabilization display in the viewfinder, it is possible to provide an inexpensive and space-saving viewfinder display device having an image stabilization display function.

FIG. 6 is a block diagram showing a circuit configuration of the finder display device shown in FIG.

In the figure, 81 is an MPU (micro processing unit), 82 is a memory, 83 is an EEP
ROM 84 is an L for displaying an index on the finder.
ED (corresponding to the light source 41 in FIG. 3);
And a drive circuit 86 for detecting a vibration in the pitch direction (the pitch vibration detection sensor 43 in FIG. 3).
, 87 is a pitch direction shake detection sensor 86
A position detection sensor (corresponding to the position detection sensor 43f in FIG. 3) for detecting the position of the vibrator, and a vibration detection sensor 88 (corresponding to the pitch vibration detection sensor 44 in FIG. 3) for detecting the vibration in the yaw direction. , 89 are position detection sensors (FIG. 3) for detecting the position of the transducer of the yaw direction vibration detection sensor 88.
, 90, 91, 9).
Reference numerals 2 and 93 are amplifier circuits.

In FIG. 6, the shake detection sensors 86, 8
8. The position detection sensors 87 and 89 are A / D of MPU81.
Connected to conversion input terminal.

Next, the operation sequence of the MPU 81 for recognizing the image stabilizing effect on the display on the viewfinder will be described with reference to the flowchart of FIG.

When the main sequence of the camera is started by turning on the main switch of the camera or the like, the MPU
81 reads a parameter related to the display of the image stabilization index 53 on the finder from the EEPROM 83 in a series of operations of the initial processing, and stores it at a predetermined address of the memory 82 (# 101).

If IS (vibration proof) is started by half-pressing the release operation member or the like (YE of # 102)
S), initialize the variables used in the processing, etc.
1 reads the output of the shake detection sensor 86 for detecting the shake in the pitch direction from the A / D conversion input terminal (# 103).

Thereafter, the offset and the gain are adjusted (# 104). The offset is adjusted when the shake detection sensor 86 for detecting the shake and the position detection sensor 87 for detecting the position of the vibrator of the shake detection sensor 86 are not operated (the oscillator of the shake detection sensor 86 is stopped, and the shake detection sensor 86, when the output of the position detection sensor 87 is zero)
The offset deviation of the shake detection sensor 86 and the position detection sensor 87 through 0 and 91 is corrected.

The gain adjustment is performed by the amplification circuits 90 and 91.
Detection sensor 86 and position detection sensor 87 obtained from
If the signals are compared as they are, even if the offset adjustment has been performed, the appearance of the actual image stabilization effect deviates from the sensation of the observer. Therefore, this is performed to correct this. More specifically, even if the signal values of the shake detection sensor 86 and the position detection sensor 87 obtained from the amplification circuits 90 and 91 are equal,
Since the actual shake amount on the finder is not equal to the position of the vibrator of the shake detection sensor 86 at that time, the output of the shake detection sensor 86 is converted into the shake amount on the finder by adjusting the gain. The anti-vibration index is displayed at the position of the vibrator of the shake detection sensor 86 equal to the amount.

In the actual processing of the MPU 81, the offset and gain are adjusted by the following equation: Gp = AMPp (Gp'-OFFSETp). Where G
p is the post-adjustment, Gp 'is the pre-adjustment, the shake detection sensor 86
, OFFSETp, and AMPp are constants for performing offset and gain adjustments, respectively, and are both stored in the EEPROM 83 in advance. The value of OFFSETp is obtained as the difference between the outputs of the shake detection sensor 86 and the position detection sensor 87 when they are not operating, and is stored in the EEPROM 83. AMPp is a constant for converting the output of the shake detection sensor 86 into a shake amount on the finder so that an image stabilization index is displayed at the position of the transducer of the shake detection sensor 86 equal to the amount. EEPROM
83.

If the value of Gp is larger than the vibration width of the vibrator of the shake detection sensor 86, the value of Gp is replaced by the values at both ends. That is, the range of the output value of the position detection sensor 87 for detecting the position of the transducer is PRpmin to Ppmin.
If Rpmax and Gp is less than PRpmin, then Gp = PRpmin. When the value of Gp exceeds PRpmax, Gp = PRpmax. In this case, the display of the anti-vibration index 53 is performed according to the output relationship shown in FIG. 4, so that when the vibration width of the vibrator of the shake detection sensor 86 becomes larger than the vibration width, the anti-vibration display 53 is displayed on the finder screen. It is to prevent that it cannot be done inside.

The output Gp of the shake detection sensor 86 after the offset and gain adjustment thus obtained is stored in the memory 82 (# 105).

Next, the pitch detection sensor 86
P of the position detection sensor 87 for detecting the position of the transducer of
Rp is read from the A / D conversion input terminal (# 106).
Then, it is checked whether or not the inclination of the output signal of the position detection sensor 87 is positive (# 107). This is the memory 82
This is performed by comparing the output of the previous position detection sensor 87 stored in. If the value stored in the memory 82 is an initialized value, it is determined that the inclination of the output of the position detection sensor 87 is not positive, and thus the inclination of the output of the position detection sensor 87 is not positive. In this case (NO in # 107), the process returns to step # 106 to read from the A / D conversion input terminal the output of the position detection sensor 87 for detecting the position of the vibrator of the vibration detection sensor 86 in the pitch direction again, and then returns to step # 106. At step # 107, it is checked whether or not the inclination of the output of the position detection sensor 86 is positive. This processing is repeated until the inclination of the output of the position detection sensor 87 becomes positive.

Thereafter, if the inclination of the output of the position detection sensor 87 becomes positive (YES in # 107), the output PRp of the position detection sensor 87 at that time and the offset and gain stored in the memory 82 are adjusted. The output Gp of the shake detection sensor 86 is compared (# 108). As a result, if the difference is equal to or less than the value of the parameter read from the EEPROM 83 to the memory 82 during the series of initial processing operations, the two are substantially equal, in other words, the swing in the pitch direction at this time is displayed on the screen. The vibrator of the pitch shake detection sensor 86 is in a vibration state in which the vibration isolation index 53 can be displayed at the position shown in (1) (corresponding to each position indicated by black circles in the outputs 61 and 63 in FIG. 4). Consider next step #
Go to 109. On the other hand, if the two values cannot be regarded as substantially equal (NO in # 108), the output of the position detection sensor 87 for detecting the position of the vibrator of the vibration detection sensor 86 in the pitch direction again is input to the A / D conversion input. Returning to step # 106 to read from the terminal, the same operation is repeated.

In the next step # 109, the MPU 81 reads the output of the shake detection sensor 88 for detecting the shake in the yaw direction from the A / D conversion input terminal. Thereafter, similar to the output of the shake detection sensor 86 that detects the shake in the pitch direction,
The offset and gain are adjusted (# 110). In the actual processing of the MPU, the offset and the gain are adjusted by the following equation: Gy = AMPy (Gy'-OFFSETy). Where G
y is the post-adjustment, Gy 'is the pre-adjustment, the shake detection sensor 86
, And OFFSETy and AMPy are constants for performing offset and gain adjustment, respectively, and are both stored in the EEPROM 83 in advance. The value of OFFSETy is obtained as the difference between the outputs of the shake detection sensor 88 and the position detection sensor 89 when they are not operating, and is stored in the EEPROM 83. AMPy is a constant for converting the output of the shake detection sensor 88 into a shake amount on the finder so that an index is displayed at the position of the vibrator of the shake detection sensor 88 equal to the amount. Asked, EEPROM8
3 is stored.

If the value of Gy is larger than the vibration width of the vibrator of the shake detection sensor 88, the value of Gy is replaced with the values at both ends. That is, the range of the output value of the position detecting sensor 89 for detecting the position of the transducer is PRymin to Pymin.
When Rymax is set, and when the value of Gy is less than PRymin, Gy = PRymin. When the value of Gy exceeds PRymax, Gy = PRymax.

The output Gy of the shake detection sensor 88 after the offset and gain adjustments thus obtained are stored in the memory 82 (# 110).

Next, the MPU 81 reads the output PRy of the position detection sensor 89 for detecting the position of the oscillator of the yaw direction vibration detection sensor 88 from the A / D conversion input terminal (# 111). Then, the output PRy of the position detection sensor 89 at that time and the offset stored in the memory 82,
The output Gy of the shake detection sensor 88 after the gain adjustment is compared (# 112). As a result, if the difference is less than or equal to the value of the parameter read from the EEPROM 83 to the memory 82 during the series of initial processing operations, the two are substantially equal, in other words, the yaw direction swing at this time is displayed on the screen. It is assumed that the vibrator of the yaw shake detection sensor 88 is in a vibration state in which the image stabilization index 53 can be displayed at the position shown in FIG. On the other hand, if the two values cannot be considered to be approximately equal,
Step # 1 starts again from the operation of reading the output of the position detection sensor 87 for detecting the position of the transducer of the vibration detection sensor 86 in the pitch direction from the A / D conversion input terminal again.
Return to 06.

Step # 113 for Displaying Anti-Vibration Index 53
Then, the MPU 81 outputs a display ON signal to the drive circuit 85 (this timing corresponds to the light emission timing of 65 shown in FIG. 4). The drive circuit 85 turns on the LED 84 while the display ON signal is being output. While the LED 84 is on, the viewfinder
Is displayed as shown in FIG.

As described above, the position detection sensor 87 for detecting the position of the vibrator in the pitch direction and the sensor 8 for detecting vibration
6, the output signal of the position detection sensor 87 is positive (or negative), and the output of the position detection sensor 89 for detecting the position of the oscillator in the yaw direction and the output of the sensor 88 for detecting the vibration When is approximately equal, by displaying the anti-vibration index 53, the index displayed on the finder always follows the object observed through the finder, so that the anti-vibration effect can be confirmed.

FIGS. 8 to 10 are perspective views showing the configuration of a correction optical device provided in the camera according to the present embodiment.

In FIG. 8, reference numeral 201 denotes a lens holder holding a correction lens 202 at the center, and the correction lens 202 is displaced through the lens holder 201 in a plane orthogonal to the optical axis to make the incident light. It is possible to deflect the light beam. Therefore, the camera shake can be corrected by detecting the camera shake and displacing the correction lens 202 so that the light beam is deflected in a direction opposite to the camera shake. Reference numeral 203 denotes a ground plane disposed in the lens barrel of the camera, and serves as a basis for supporting the lens shift mechanism. Reference numeral 204 denotes a yaw holder, which has a projection (not shown) that fits into the elongated hole 203a of the main plate 203, and is configured to be displaceable only in the yaw direction.

A guide bar 205 is inserted through a guide hole 201a formed in the lens holder 201. Both ends of the guide bar 205 are supported by a bearing portion 204a of the yaw holder 204 so that the axial direction thereof is in the pitch direction. I have. With such a configuration, the lens holder 201 can be displaced only in the pitch direction on the yaw holder 204, and the yaw holder 204 can be displaced only in the yaw direction with respect to the base plate 203. The correction lens 202 can be displaced in both pitch and yaw directions.

Reference numeral 206 denotes a yaw motor composed of a step motor, which is arranged so that the direction of its rotation shaft 206a is perpendicular to the optical axis. A feed screw 207 having an external thread cut on the outer periphery is provided on the rotary shaft 206a.
Has been fixed. FIG. 9 (a) shows the details of the fixing portion, and as shown in FIG.
a is inserted and fixed. Note that, as shown in FIG. 9B, a structure may be employed in which a screw is directly cut on the rotation shaft (as in 206b).

Reference numeral 208 denotes a nut having a female thread cut into engagement with the feed screw 207, and has a U-shaped portion 208a in which a later-described steadying member is inserted. The leading end of the feed screw 207 is fitted to the bearing portion 203b of the main plate 203, and the yaw motor 206 is driven so that its axis is in the yaw direction.
Is fixed by adhesive or the like. In the yaw holder 204,
Nut receiving portion 204 for inserting nut 208 therebetween
b, 204c and a steadying portion 204d for stopping rotation of the nut 208.

Here, the feed screw 207, the nut 208,
The relationship between the yaw holder 204 will be described with reference to FIGS.

The nut 208 is screwed into the feed screw 207 and simultaneously the nut receiving portion 20 of the yaw holder 204 is
4b and 204c, the U-shaped part 208a has a steady rest part 204d, so that the nut 208 does not rotate. When the yaw motor 206 rotates, the feed screw 2 fixed to the motor shaft 206a
07 rotates. When the feed screw 207 rotates, the nut 208 also tries to rotate. However, the nut 208 does not rotate because the U-shaped part 208a is stopped by the steadying part 204d, and the nut 208 rotates per one rotation of the yaw motor 206. It moves in the axial direction of the screw by one pitch.

When the nut 208 moves in the axial direction of the screw, it comes into contact with the yaw holder 204 and moves the yaw holder 204 integrally. A yaw spring 209 is disposed between the spring receiving portion 204e of the yaw holder 204 and the spring receiving portion 203c of the main plate 203, and urges the yaw holder 204 in the yaw direction (to the left in FIG. 8).
Since the yaw holder 204 is urged leftward in this manner, the nut 208 and the yaw holder 204 are integrated with the right side surface of the nut 208 always in contact with the left side surface of the nut receiving portion 204c of the yaw holder 204. Is displaced.
The pitch of each screw of the feed screw 207 and the nut 208 is finely cut, and the feed screw 207 is not rotated by the urging force of the nut 208 on the feed screw 207 in the axial direction. That is, the nut 208 moves when the yaw motor 206 rotates,
When the current supply to the motor 206 stops and the motor 206 stops, the motor 206 remains stopped at the position at that time.

Reference numeral 210 denotes a pitch motor composed of a step motor, and the rotation shaft 210a is fixed on the yaw holder 204 so that the direction of the rotation axis 210a is perpendicular to the optical axis and in the pitch direction. The yaw motor 2
A feed screw 211 having a male screw cut on the outer circumference is fixed to the rotation shaft 210a, and the feed screw 211 is screwed with a nut 212. Mated. Nut 212
Are nut receiving portions 201b and 20 of the lens holder 201.
1c and is inserted into the U-shaped portion 212a.
The rotation is regulated by entering 1d. Lens holder 2
01 is urged upward on the yaw holder 204 in the figure by a pitch spring 213 disposed between the bearing portion 204a of the yaw holder 204 and the holder itself.
Similarly to the yaw direction, when the pitch motor 210 rotates,
The feed screw 211 fixed to the shaft rotates, and the nut 2
12 cannot be rotated by the steadying portion 201d of the lens holder 201, and thus moves in the axial direction by one pitch of the screw per rotation of the feed screw 211, and
The lens holder 20 while contacting the receiving portion 201c.
Move 1 The lens holder 201 is a pitch spring 2
13, the nut 21 is urged upward.
2 and the upper surface of the receiving part 201c of the lens holder 201 are constantly displaced.

With the above-described configuration, the lens holder 201 moves the yaw holder 20 in accordance with the rotation of the pitch motor 210.
4 is displaced in the pitch direction.

The yaw spring 209 and the pitch spring 213 are arranged so as to push the vicinity of an axis serving as a guide when the yaw holder 204 and the lens holder 201 are displaced, respectively. That is, the pitch spring 213 pushes the lens holder 201 on the axis of the guide bar 205, and the yaw spring 209 pushes the vicinity of the longitudinal axis of the long hole 203a. The displacement is prevented so as to be performed smoothly.
Further, the pitch spring 213 biases the lens holder 201 in a direction opposite to the direction of gravity (upward in FIG. 8), and is arranged so that gravity and spring force are not applied in the same direction.

A yaw displacement sensor 214 uses a well-known photo reflector. The yaw holder 204 has a sensor reflection portion 204g, which is painted white to increase the reflectance. The yaw displacement sensor 214 is fixed to a cover member (not shown), and when the yaw holder 204 is displaced in the yaw direction, the amount of light of the photoreflector reflected by the reflecting portion changes, and the displacement can be detected. Reference numeral 215 denotes a pitch displacement sensor, which uses a photoreflector similarly to the yaw direction, and is fixed to a cover member. Reflector 201e on lens holder 201
Are provided in the same manner as the mounting portion 204g, and are painted white to increase the reflectance.

When the lens holder 201 is displaced in the pitch direction, the amount of light of the photoreflector reflected by the reflecting portion 201e changes, and the displacement can be detected. The reflecting portion 201e of the lens holder 201 is formed to be long in parallel to the yaw direction. Even if the lens holder 201 is displaced in the yaw direction along with the displacement of the yaw holder 204, the amount of light reflected by the photo reflector changes. Instead, it is configured to change only by displacement in the pitch direction.

With the above configuration, the displacement of the lens holder 201 displaced in both the pitch and yaw directions can be detected independently of the pitch direction and the yaw direction.

In the above configuration, the pitch motor 210
Is fixed on the yaw holder 204 and the lens holder 2
01 (correction lens 202) is displaced in the pitch direction, and the yaw motor 206 is fixed on the main plate 203 and displaces the correction lens 202 in the yaw direction together with the yaw holder 204 and the pitch motor 210. In this manner, the direction in which the motor and the correction lens 202 are integrally displaced is referred to as “yaw direction = horizontal direction”, and the direction in which only the correction lens 202 is displaced is referred to as “pitch direction = vertical direction”. By displacing only the correction lens 202, a large load is prevented from being applied.

Further, as described above, when the correction lens 202 is displaced in the yaw direction, since the correction lens 202 and the pitch motor 210 are driven integrally, no relative displacement occurs between them. Motor 210
The structure is simpler and the movement is smoother than the one fixed above. That is, the pitch motor 210
Also, in the case of a structure fixed on the ground plate 203, since a relative displacement occurs between them, a structure using a sliding member for sliding the lens holder is adopted. Therefore, when driving in the yaw direction, friction occurs between the sliding member and the lens holder, and the driving load increases due to frictional resistance, and the structure must be complicated. Further, there is a problem that response is delayed due to backlash. By adopting the above-mentioned structure, it is possible to solve the above-mentioned point.

The pitch motor 210 and the yaw motor 2
Since these motors are arranged such that the direction of each of the rotation shafts 210a and 206a, that is, the longitudinal direction of each motor is perpendicular to the optical axis, the correction optical device can have a flat structure. In other words, the correction optical device does not become longer in the optical axis direction and is not enlarged. In addition, when the correction optical device is incorporated in a camera, the motor can be disposed in a space around the lens necessary for a place where the shutter blades can escape, and the like. The space efficiency and the like when incorporated in the device are improved.

Further, since the moving direction of the correction lens 202 (lens holder) coincides with the rotation axis direction of each motor, as shown in FIG.
2 can be displaced, and the motor 1 can be displaced compared to a conventional motor that transmits the output of a motor to a cam to displace the correction lens.
Since the screw is displaced by one pitch per rotation (in the case of a cam,
The entire stroke of the correction lens must be within one rotation of the motor, the lens movement amount per motor rotation angle is large, a large force is required, and the accuracy is poor), and sufficient force can be output without a reduction gear At the same time, highly accurate control becomes possible. Specifically, if the pitch of one screw is 0.2 mm, the number of rotations of the motor is 5 for a stroke of 1 mm.

Next, the operation of the correction optical device will be briefly described.

First, when the power of the camera is turned on, the yaw displacement sensor 214 and the pitch displacement sensor 215
04, reflection part 204g of lens holder 201, 201
e, the position of the lens holder 201 is detected, and the yaw motor 206 and the pitch motor 210 are driven to move the correction lens 202 to a position where the center of the correction lens 202 coincides with the center (optical axis) of the photographing optical system. To move. When the power supply to the motor is stopped, the correction lens 20
2 stays in that position. When camera shake correction is not performed, shooting is performed with the correction lens 202 at this center position. When performing camera shake correction at the time of shooting, the shake detection sensors 86 and 8 shown in FIG.
The yaw motor 206 and the pitch motor 210 are driven based on the signal from 8 to displace the yaw holder 204 and the lens holder 201 (correction lens 202) in a direction to cancel camera shake.

FIG. 11 is a block diagram showing an electrical schematic configuration of a camera having a finder display device and a vibration proof system having a correction optical device and a shake detection sensor having the above-described configuration. Note that this camera is assumed to be a compact camera that can retract the taking lens.

In the figure, reference numeral 301 denotes a camera microcomputer;
Reference numeral 302 denotes a main switch of the camera. Reference numeral 303 denotes a release operation member which starts an imaging preparation operation by half-pressing it, that is, generates an s1 signal for starting photometry and distance measurement, and s2 for starting an imaging operation (exposure operation) by fully pressing it. A signal is generated. 304 is a photometric circuit for calculating photometric information, 305 is a distance measuring circuit for calculating distance measuring information,
Reference numeral 306 denotes a lens focusing drive circuit for adjusting the focus of the photographic lens, 307 denotes a shutter circuit for opening and closing the shutter, 308 denotes a flash device, 309 denotes a zoom drive circuit for adjusting the focal length of the photographic lens, and 310 denotes a zoom drive circuit. A film feeding circuit for winding and rewinding the film, 311 is a correction optical device shown in FIG. 8, and 312 is a shake detection sensor shown in FIG. 3, which also serves as an actuator for display of image stabilization. This is for performing shake detection for use for shake correction of the optical device and the correction optical device. Reference numeral 313 denotes a display device, which also includes a portion for performing image stabilization display (display of image stabilization indicators) in the finder shown in FIG.

The camera microcomputer 301 receives the signals from the main switch 302, the s1 and s2 signals from the release operation member 303, the photometry information from the photometry circuit 304, and the distance measurement information from the distance measurement circuit 305, respectively. Based on these signals, the lens focusing drive circuit 306,
Shutter circuit 307, strobe device 308, zoom drive circuit 309, film feed circuit 310, correction optical device 3
11. The operation of the shake detection sensor 312 and the display device 313 is controlled.

Necessary information is also input to the camera microcomputer 301 from each of the above-described circuits and devices. For example, positional information of a photographing lens and a lens driving motor for focusing are supplied from a lens focusing driving circuit 306. , The shutter opening amount information from the shutter circuit 307, the feeding amount information of the photographing lens from the zoom driving circuit 309, the film feeding state information and the feeding motor information from the film feeding circuit 310. The load information and the position (displacement) information of the correction lens from the correction optical device 311 are output from the shake detection sensor 312.
, Shake information applied to the camera is input.

Further, the camera microcomputer 301 causes the display device 313 to display the states of the above-mentioned plurality of circuits and devices, and furthermore, displays the image stabilization state, and if necessary, makes the strobe device 308 emit light so as to compensate for the light amount at the time of shooting. ing.

FIGS. 12 and 13 are flow charts for explaining the camera sequence in the camera microcomputer 301. This flow starts when the main switch 302 is turned on, and simultaneously measures the time until the time t1 is reached. A timer 301 is started (hereinafter, for convenience of description, this is referred to as a timer t1. Other timers are used in a similar manner). This timer t
Reference numeral 1 is for automatically turning off the main switch 302 when the camera is left unattended while the main switch 302 is on.

When the main switch 302 is turned on as described above, the camera microcomputer 301 proceeds to step # 4.
At 01, the photographing lens retracted in the camera body is extended by the zoom drive circuit 309. At this time, the lens barrier that protected the photographing lens is also opened. In the next step # 402, a display (usually displayed on the surface of the camera body or in the viewfinder of the camera) indicating the status of each function of the camera and shooting information is turned on on the display device 313. In the following step # 403, power is supplied to a shake detection sensor 312 provided in the camera to detect camera shake, and shake detection is started.

Next, in step # 404, a zoom tele (increase the focal length) operation (not shown in FIG. 11, but the state of the zoom switch for performing the zoom operation is also input to the camera microcomputer 301). It is determined whether or not zoom operation has been performed. If the zoom tele operation has been performed, the process proceeds to step # 405, where the zoom drive circuit 30
The photographing lens is driven in the telephoto direction via 9. At this time, the timer t1 is reset. The timer t1 is reset every time an operation switch provided on the camera is operated, in addition to the zoom operation. That is, the main switch 30 is automatically turned on every operation.
The timer t1 for turning off the camera 2 is reset, and the main switch 320 of the camera is not turned off as long as some operation continues.

If the zoom tele operation has not been performed in step # 404, the flow advances to step # 406.
Here, it is determined whether or not a zoom wide operation (to shorten the focal length) has been performed. If the zoom wide operation has been performed, the process proceeds to step # 407, and here, via the zoom drive circuit 309. To drive the taking lens in the wide direction. At this time, the timer t1 is reset in the same manner as described above. Of course, it is needless to say that when the lens is already at the wide end or the telephoto end, the photographing lens is protected from being driven even when further driven in that direction.

In the next step # 408, it is determined whether or not the s1 signal has been generated by half-pressing the release operation member 303. If the s1 signal has not been generated, step # is performed.
Proceeding to 409, it is determined whether the value of the timer t1 has become equal to or greater than t0 or whether the main switch 302 has been turned off. Accordingly, when it is determined that the photographer has stopped using the camera, that is, when it is determined that the main switch 302 is turned off or the camera is not operated for t0, for example, for 4 minutes, the camera is in an abandoned normal state, and the process proceeds to step # 427.

In step # 427, the shake detection sensor 3
The power supply to 12 is stopped. Then, step # 428
Then, contrary to the case of step # 401, the taking lens is retracted and stored in the camera body, and at the same time, the lens barrier is closed. In the next step # 429, the display on the display device 313 is turned off, and a series of operations ends.

In step # 409, when the timer t1 has not reached t0 or when the main switch 302 is on, the process returns to step # 404, and the operation from step # 405 to step # 409 is performed. repeat.

In the flowchart of FIG. 12, the states of the operation members are only the states of the zoom operation switch, the main switch 302, and the release operation member 302 (not shown). It goes without saying that the operation switches for mode switching and the display at that time also interrupt the actual flow.

If it is determined in step # 408 that the s1 signal has been generated by half-pressing the release operation member 303, the flow advances to step # 410. Then, in step # 410, a timer t2 (counting independently of the timer t1) for counting until the time t2 is reached is started. Next step # 411
Then, photometry of the object is performed by the photometry circuit 304, and when the photometry operation is completed, the process proceeds to step # 412. Here, the distance measurement (distance measurement) to the subject is performed by the distance measurement circuit 305, and when the distance measurement operation is completed. Go to step # 413. Then, in step # 413, the photographing lens is driven for focusing via the lens focusing drive circuit 306, and when the focusing drive is completed, the process proceeds to step # 414.

In step # 414, the correction optical device 31
The first correction lens is aligned with the optical axis of the taking lens. Usually, the optical axis of the correction lens coincides with the optical axis of the taking lens,
In this step, when the optical axis of the correction lens and the optical axis of the photographing lens are misaligned, they are made to coincide with each other so that a good image can be obtained. Specifically, the position of the correction lens is detected by a position detection sensor, and when the position is not at a predetermined position (initial position), the correction lens is driven to the predetermined position. Then, when the output of the position detection sensor has reached a predetermined value or when the output has reached the predetermined value, the process proceeds to step # 415, and the display device 31
In step 3, the image stabilization display is turned on, that is, the image stabilization index 53 is displayed, and the state of image stabilization is displayed to the photographer. And FIG.
The process proceeds to Step # 416 of Step 3.

In step # 416 of FIG. 13, the flow waits until the s2 signal is generated by fully pressing the release operation member 303. Release operation member 303 for performing the exposure operation
When the full-pressing operation is performed and the s2 signal is generated, the process proceeds to step # 417, and the counting of the timer t2 is stopped. In the next step # 418, the timer t2 is compared with a predetermined time T (for example, 200 msec), and if "t2>T", the flow proceeds to step # 420. And this step #
At 420, the correction optical device 311 starts the shake correction.

In step # 418, "t2 <
T ”or“ t2 = T ”(since the release operation member 303 has been pressed all the way at once, s
(When the interval between the 1 signal and the s2 signal is less than the time T)
In step # 419, the anti-shake display is changed, for example, by flashing the anti-shake index 53, and this is set as a camera shake warning display. In such a case, that is, “t2 <T”
Alternatively, when “t2 = T”, the correction optical device 311 is not caused to perform shake correction. The reason why shake correction is not performed when the release operation member 303 is fully pressed all at once is described below.

The moment the release operation member 303 is fully pushed at once, the camera shakes greatly in the pushing direction. The frequency component of the shake is lower than the frequency component of the shake (for example, 500 mHz), so that the shake detection sensor 312 may not be able to detect the shake with high accuracy.

If the vibration detected by the shake detection sensor 312 is an angular velocity, the output is integrated by calculation and the output is set to a target value to drive the correction lens, or the mechanical operation of the correction lens is performed. The angular velocity input from the characteristics is mechanically integrated, and the movement of the correction lens becomes the angle of camera shake.In the case of a vibration reduction system that cancels out the vibration applied to the camera, the limit of the integration capability causes the extremely low frequency This is because the run-out is not accurately integrated. (The phase is shifted from the actual camera shake. For details, refer to JP-A-63-275917.)

In the state where the accuracy of the shake correction is poor (when the shake is corrected by shifting the phase from the actual shake), if the shake correction is performed, the image may be deteriorated rather than before the shake correction. For this reason, it is detected whether or not the shake having different characteristics described above has occurred due to the intense operation of the release operation member 303 at the operation interval between the half-press and full-press of the release operation member 303, that is, the time interval between the s1 signal and the s2 signal. hand,
Shake correction is not performed.

After the operation in step # 419 or # 420 is completed, the flow advances to step # 421, in which the opening and closing of a shutter (not shown) is controlled via a shutter circuit 307 to expose the film. Although details are omitted in the flow of FIG.
At 21, the shutter is opened after the shutter is opened for an amount and time determined by the photometry information obtained by the photometry circuit 304, and the exposure of the film is completed. Further, while the film is being exposed, for example, an operation of turning off the image stabilization system (consisting of the correction optical device 311 and the shake detection sensor 312) (an operation member for turning off the image stabilization system by a photographer) The camera shake correction is not stopped even if there is a camera. This is to prevent the behavior of the correction lens when the shake correction is stopped during the exposure from causing the image deterioration to occur, and also as a countermeasure when the image stabilizing system is accidentally turned off during the exposure.

In the next step # 422, it is determined whether or not the shake correction has been performed. If the shake correction has not been performed (if this step has been performed without passing through the step # 420), the process proceeds to the step # 422. Proceed to 424. On the other hand, if the shake correction has been performed, the process proceeds to step # 423, where the shake correction by the correction optical device 311 is stopped, and then the correction lens is centered (similar to step # 414), and the process proceeds to step # 424.

In the next step # 424, the display device 31
The image stabilization display in step 3 is turned off. The anti-shake display is performed according to the actual shake by the anti-shake index in the finder as described above, and the photographer can check the anti-shake state while looking through the finder. . In the following step # 425, the photographic frame is wound up through the film feeding circuit 310, and the setting is made so that the next unphotographed frame comes to the photographic position. Then, the process proceeds to step # 426, where the timer t
1 is reset, and the process returns to step # 404 in FIG.
The reason for resetting the timer t1 in step # 426 is that the time value of the timer t1 increases,
This is to prevent the main switch 302 from being automatically turned off.

In the above flow, the state of the main switch 302 is only observed at step # 409 in FIG.
2, the camera accepts the main switch 302 even if the main switch 302 is turned off during the long exposure.

Here, it may take some time (about one second) from when the power of the anti-vibration system, particularly the vibration detection sensor 312 is turned on when the power is turned on, until the output is stabilized. If photographing is performed before that, not only can shake correction not be performed properly, but also image deterioration may occur (due to an erroneous signal from the shake detection sensor 312). In order to prevent such a situation, the camera sequence is such that shooting is prohibited until the shake detection sensor 312 is stabilized.

FIG. 14 is a flowchart in the camera microcomputer 301 of only the part relating to the above countermeasure. This flow is started after the main switch 302 is turned on and the shake detection sensor 312 starts operating. That is, it starts after step # 403 in FIG.

First, at step # 501, a timer t for measuring a time t3 until the shake detection sensor 312 is stabilized.
Start 3 In the next step # 502, the output of the shake detection sensor 312 is checked, and if the output is smaller than the predetermined value, the process immediately proceeds to step # 504. However, if the output becomes larger than the predetermined value, that is, if the shake becomes large, step # 503 is performed. To reset the timer t3,
It returns to step # 502. This is because the calculation in the shake detection sensor 312 becomes saturated when the shake becomes large to some extent, and it takes time until the shake detection sensor 312 is stabilized again.

In the next step # 504, the flow waits until the s1 signal is generated by half-pressing the release operation member 303.
When the s1 signal is generated, the process proceeds to step # 505. Then, in step # 505, the time from the start of counting the timer t3 to the half-press operation of the release operation member 303 (this time is also referred to as t3 for convenience) is held. In the following step # 506, the time t3 is set to a predetermined time T
x (the required image stabilization accuracy varies depending on the zoom and shutter speed, so this time Tx is variable. For example, when the zoom telephoto and shutter speed are slow, the image stabilization accuracy needs to be increased. The time Tx is set to be longer at 1.5 seconds), and when “t3> Tx”, the step #
The process advances to step 507 to wait for the generation of the s2 signal due to the full depression of the release operation member 303. When the s2 signal is generated, the process proceeds to step # 508 to perform an exposure operation.
Of course, at this time, the shake detection sensor 312 is sufficiently stable (since t3> Tx), and at the time of exposure, the correction optical device 311 is used.
Is performing shake correction.

Also, in step # 506, "t3>Tx"
If it is determined that it is not the case, the exposure cannot be permitted because the shake detection sensor 312 is not yet stable.
Proceed to step # 509 to release the release operation member 303 again.
To see if the s1 signal is generated. As a result, if the s1 signal is generated, the process remains at this step. That is, as long as the release operation member 303 has generated the s1 signal in step # 509, the photographing cannot be performed.

Thereafter, when it is determined in step # 509 that the s1 signal has not been generated in the release operation member 303 (when the photographer's finger has separated from the release operation member 303).
Proceeds to step # 510, and releases the hold of the timer t3. As a result, the timer t3 further advances the time measurement from the current time value. After that, step # 5
Return to 02. This is because, since the shake detection sensor 312 is not stable, even if the release operation member 303 is fully pressed, the release operation is not proceeded to the exposure operation of step # 507 after step # 506. Even if the member 303 is kept pressed, the photographing cannot be performed for a long time.
When the release operation member 303 is half-pressed again (s1 signal generation) and full-pressed (s2 signal generation) again after releasing the finger from 3 (of course, at that time "t3>Tx" is required), the photographing is enabled. ing.

That is, once the release lock is established, the release lock is not released unless the half-press operation of the release operation member 303 is released.

The release operation member 303 is composed of a generally known push-type switch. When the release operation member 303 is pressed one step, an s1 signal is generated, and when the release operation member 303 is further pressed (two-step press), an s2 signal is generated. . In such a case, the shake detection sensor 312 is in an unstable state (the main switch 30).
If the shake detection sensor 312 is returned to a stable state again after a large shake is input or when a large shake is input, the release lock is performed until the shake detection sensor 312 is stabilized. If the release lock is released while the shutter release button is fully pressed, the photographer will take a picture at a timing unintended by the photographer, as in the case of a longer release time lag, and a photograph will be taken at an undesirable photographing opportunity. Further, when the release lock is performed in this manner, the photographer does not notice the fact and tends to perform an operation of further pressing the release operation member 303 strongly, and the shake due to this operation is too large to be suppressed by the vibration isolation system. There is a risk of becoming. Then, if the release lock is released at such a timing and the image is taken, the image deteriorates greatly.

In consideration of the above, in the flow of FIG.
When the release lock is locked, the user temporarily releases his / her finger from the release operation member 303 to stabilize the camera (shake detection sensor 312) so that the release lock is not released.

The camera sequence has been described under the condition that the image stabilization system is used. However, there is a case where the image stabilization system is not used depending on the state of the camera. The sequence at that time is shown in FIG.

The flow shown in FIG.
, And first, in step # 601, FIG.
In step # 415 of the second step, the setting is such that the image stabilization display can be performed.
It is tentatively decided here whether to display the image stabilization at 415).

In the next step # 602, it is determined whether or not the flash device is being charged by the flash device 308 (hereinafter referred to as "flash charging"). If the flash device is being charged, the process proceeds to step # 606. If the flash charging has been completed, the process proceeds to step # 603. In step # 603, it is determined whether the remote controller or the self-timer of the camera is operating. If the camera is operating, the process proceeds to step # 606, and if not, the process proceeds to step # 604.

In step # 604, it is determined whether or not normal flash photography is performed (except when the flash device 308 is used with a long shutter speed as in slow synchro photography). Step #
Proceed to 606, otherwise proceed to Step # 605. In step # 605, it is determined whether or not a super slow shutter operation (for example, 2 seconds) has been performed. If it is a super slow shutter operation, the process proceeds to step # 606; otherwise, the process proceeds to step # 607.

In step # 606, the setting is made such that the image stabilization display is not performed in step # 415 in FIG. 12 (the setting in step # 601 is canceled).

In step # 607, the product A of the shutter speed and the zoom information (for example, if the shutter speed is "1"
/ 60 ”and“ 1.6mm ”when the zoom focal length is“ 100mm ”.
7) is smaller than A ₀ (eg, “1”). If “A <A ₀ ”, eg, smaller than “1”, the process proceeds to step # 609, and in step # 420 of FIG. The setting in which the shake correction drive is not performed by the correction optical device 311 is set. On the other hand, when the value is “1” or more, the process proceeds to step # 608, in which the shake correction drive is performed by the correction optical device 311 in step # 420 in FIG. To Thereafter, the process returns to step # 601.

The above-described flow will be described. When the strobe is being charged and the power supply has no margin, the correction optical device 3
11 is not driven. (In such a case, functions other than the image stabilization cannot be used.) Further, even when the remote controller or the self-timer is used, the shake correction is not performed. This is because when using a remote control or self-timer, the camera is fixed on a tripod and used under conditions that prevent camera shake, so there is no need for shake correction. When the camera is fixed, the impact of the shutter drive when the camera is used is transmitted to the shake detection sensor 312, and the shake detection sensor 312 malfunctions, thereby not only reducing the shake correction accuracy but also not correcting the shake. This is because there is a possibility that the image deteriorates from time to time.

The reason why shake correction is not performed during normal flash photography is that, in such a case, since the flash emission time of the flash to the subject is extremely short, for example, 500 msec, there is almost no effect of camera shake on the image during this time. It is.

Note that even in flash photography, slow sync is used (the shutter speed is determined based on the photometric information of the subject, so that a slow shutter is used for a dark subject. In the exposure state, the background where strobe light does not reach can be clearly captured because of the slow shutter. However, if a tripod is not used in general, the effect of camera shake will occur if a slow shutter is used.) To prevent image deterioration.

Super slow shutter, for example, when the focal length is 15
No shake correction is performed at a long shutter speed of 1 second at 0 mm and 4 seconds or more at 30 mm. This is because such a super slow shutter contains an extremely low frequency component, and as described above, it is not possible to accurately perform shake correction due to the limit of the integration ability of the shake detection sensor 312. In addition, the output of the shake detection sensor 312 includes an output fluctuation (drift) of an extremely low frequency, and such an output fluctuation also affects image deterioration at the time of a super slow shutter. .

As described above, during flash charging, when using the remote control or the self-timer, during normal flash photography, and
When the super slow shutter is used, the shake correction is not performed (because the step # 609 is passed), and the step # 606 is performed.
As described in the above section, the setting is such that the image stabilization display is not performed. This clearly indicates to the photographer that no shake correction is performed,
This is to encourage you to hold the camera firmly.

The reason why the shake correction is not performed when the product of the shutter and the zoom is smaller than the predetermined value is because the influence of image deterioration due to camera shake is small in such a case. However, in such a case, the image stabilization display is performed even though the shake correction is not performed (because step # 606 is not performed). This determination is automatically made in step # 607, and the ON / OFF of the shake correction is frequently switched due to a change in the framing of the camera (the change in the brightness of the subject causes a change in the shutter speed). This is because it is not preferable that the image stabilization display is turned on and off. Further, it is not important to inform the photographer that the shake correction is not performed as much as the above four states in which the image stabilization display is not performed (the image degradation does not occur even if the image shake is not notified to the photographer). This is because the photographer does not know the meaning of what has been done, but rather gives anxiety.

If it is determined in step # 607 that no shake correction is necessary, the release lock described with reference to FIG. 14 is not performed unconditionally, thereby improving the camera's quick shooting performance. That is, when the zoom is wide, when the shutter speed is fast, or when a shake correction is not necessary due to a combination thereof, shooting can be performed immediately after the main switch 302 is turned on. do not do.

What is important in this flow is step # 6
In the setting 09, the shake correction is not performed. However, if the shake correction is not performed, the shake detection sensor 312 only outputs the shake correction target value to the correction optical device 311.
Is still operated, and all other functions related to image stabilization (excluding display) are in operation.

This is because when the anti-vibration system is frequently required as in the discrimination in step # 607 and when the anti-vibration system is not frequently used (shutter speed change due to framing change, etc.), the ON / OFF of the shake correction is immediately performed. It is to make it correspond. More specifically, if all the components of the vibration isolation system are turned on and off every time, a standby time until stabilization is required each time the system is started up, resulting in a vibration isolation system having poor mobility. is there. The correction optical device 311 can be turned on immediately because its operation time constant is small. Therefore, when not using the image stabilization system, the entire system is not turned off and only the correction optical device 311 is not used. (Only output to the device 311).

As described above, it is not preferable to turn off all the anti-vibration systems (particularly, the shake detection sensor 312) because it takes time until the anti-vibration system is stabilized again at the next use. For this reason, components other than the correction optical device 311 among the components of the image stabilization system are operated as much as possible while the main switch 302 of the camera is on.

FIG. 16 shows the relationship between the camera sequence and the image stabilization system.

As described above, in the related art, unusual shakes (eg, a release operation or a zoom operation) when operating the camera other than the camera shake added to the camera have not been taken measures. The operation and non-operation of the shake correction are controlled by the operation time difference (the value of the timer t2) between the half-press and the full-press, and more specifically, when the operation time difference is within a predetermined time, the shake correction is not performed or the shake correction is performed. Since the configuration is such that the operation is interrupted (steps # 418 to # 419 in FIG. 13), when a large and low-frequency shake is applied when the release operation member 303 is pressed at a stroke, the image stabilization system malfunctions and image deterioration occurs. Will not be caused.

The display of the image stabilizing system is controlled based on the operation time difference at this time. That is, when the operation time difference is within a predetermined time, a camera shake warning display is performed. You can decide whether to do again
You will not miss a shutter chance without knowing that the shooting has failed.

Further, as shown in FIG. 14, even if the release operation member 303 is not half-pressed until the anti-vibration system (vibration detection sensor) operates properly, the release lock is performed and the release operation member 303 is released. Since the half-press is released once and the release lock is kept until it is operated again, the release lock is inadvertently released, so shooting is performed at an undesired shooting opportunity of the photographer It is possible to prevent the image from deteriorating due to a large shake caused by the release lock (due to a strong pressing operation that the full pressing is not accepted).

As described with reference to FIG. 15, when the shutter speed at the time of photographing is high or the like, the correction optical device 311 is deactivated, but the shake detection sensor 312 is kept operating. In addition, it is possible to eliminate a time loss caused by starting up when using the anti-vibration system, thereby improving the mobility of the camera.

Also, for example, when the shutter speed is high and the correction optical device 311 is not operated, the image stabilization display is performed. That is, when the image stabilization is automatically turned on and off at the shutter speed, the image stabilization is performed. Is not controlled (the image stabilization display is performed even if the shake correction is not performed) (step # in FIG. 15).
607 → # 609 (does not pass through # 606)), so that an unnecessary change in display does not give the photographer a feeling of anxiety.

Further, the conventional correction optical device has a large scale, and it is necessary to increase the size of the camera itself in order to mount the correction optical device on a camera. However, in the above-described compact camera, the size and weight of the camera are increased. It is fatal, and since the structure is complicated, both the component cost and the assembly cost are high, which has many drawbacks, such as being unfavorable as a consumer product. The above-mentioned drawback can be solved by using the correction optical device of (1).

Further, conventionally, in the case of the anti-shake system mounted on a single-lens reflex camera, it is possible to recognize through the viewfinder that the shake is actually corrected because of the TTL system in which the photographer can aim at the subject through the photographing lens. However, in the case of a compact camera, the operation of the image stabilizing system cannot be known through the viewfinder because the lens of the shooting system (to correct the shake) and the lens of the viewfinder system for the photographer to check the subject are dedicated (of course, the viewfinder). If a special correction optical device is also installed in the system, it is possible to know the state of image stabilization, but doing so increases the size of the camera and increases the cost), so the operation state of the image stabilization system has not been confirmed In some cases, photographing was performed in a state where sufficient shake correction was not performed because the photographing was performed as it was.
Furthermore, despite the camera equipped with a new function called an anti-vibration system, it was also unsatisfactory that the user could not persuade the user of this fact. Also in this regard, by providing the camera with a finder optical device capable of anti-vibration display having a structure as shown in FIG. 3, the above problem can be solved while keeping the camera compact.

Further, the addition of the anti-vibration system requires the user to perform an operation for that, and the anti-vibration system also outputs information such as the anti-vibration state to the user. The operation was complicated for the user, and there was a risk that the camera would be difficult to understand.However, it was decided whether or not to use the anti-vibration system automatically, and at the time of image stabilization, in what direction and how much the image was shaken Is recognized by the display, so that the above-mentioned disadvantage can be solved.

(Second Embodiment) FIG. 17 is a block diagram showing a circuit configuration of a camera according to a second embodiment of the present invention. The difference from FIG.
Is only input to the camera microcomputer 301. The prediction amount generation circuit 314 will be described below.

FIG. 18 is a side view of a camera according to a second embodiment of the present invention. The camera body 701 and a lens barrel 70 housed in the camera body 701 when not in use.
It consists of two. Reference numeral 303 denotes the above-described release operation member which is a two-stage tact switch. When the camera is half-pressed, the camera enters a shooting ready state (photometry, distance measurement, lens focusing drive). Exposure to the film is performed.

In general, the force for pressing the release operation member 303 (the force in the direction of the arrow 703) is slow and weak, but a strong force is applied in the direction of the arrow 703 depending on the photographer who uses the camera and shooting conditions. Sometimes. In such a case, a large shake occurs in the direction of the arrow 703 as described above.

In the first embodiment, it is described that the occurrence of the shake can be predicted by looking at the timing of the s1 signal generated by half-press and the s2 signal generated by full press. Shake correction was not performed.

However, since the waveform of the large shake in the direction of the arrow 703 is substantially determined by the timing of the s1 signal and the s2 signal (the speed at which the release operation member 303 is pressed ) , the occurrence of the shake is predicted. Shake can also be corrected.

FIG. 19 shows a waveform 71 of camera shake applied to the camera.
1, and when the generation interval of the s1 signal and the s2 signal is narrow,
An abrupt change 711a in the camera shake waveform occurs. This waveform shows the speed of pressing the release operation member 303, the pressing force,
It is determined by the weight of the camera.

Therefore, such a shake can be corrected by storing the shake waveform in the predicted amount generating circuit 314 and driving the correction optical device 311 with the predicted waveform at the timing when the release operation member 303 is pressed. .

FIG. 20 is a diagram in which the vibration when the release operation member 303 is pushed at a stroke is extracted.
11a are straight lines 712a, 71 having several inclinations indicated by dotted lines.
2b, 712c.

Then, an optimum straight line is selected according to the shutter speed, the release time lag, and the focal length of the camera. For example, when the shutter speed is high (ta in FIG. 20).
(Fixed, tb shifted to the left side of the paper), the straight line 712a is closest to the waveform 711a, and when the shutter speed is long, the straight line 712c is selected. When the release time lag is long (ta and tb in FIG. 20 are shifted to the right in the drawing), the straight line 712b is closer to the shake waveform 711a at the time of exposure (from ta to tb) than the straight line 712a. The straight line 711a is selected as the quantity.

When the focal length of the lens changes, the amount of image shake on the film image plane differs even if the amount of camera shake applied to the camera is the same (for example, an angle of 0.2 degrees). Image blur is larger than wide.) Therefore, the gradient of the straight line in FIG. 20 is also changed by the focal length of the lens (in the zoom telephoto, the gradient of the straight line is tight).

The output of the predicted amount generation circuit 314 in FIG.
In this way, selection and change are made in the camera microcomputer 301 according to the state of the camera (focal length, shutter speed, release time lag).

By driving the correction optical device 311 at the time of exposure with the predicted amount at the time of photographing obtained as described above, it is possible to correct a large shake at the time of a single push operation of the release operation member 303. Hereinafter, the photographing sequence of the camera in such a system will be described with reference to the flowchart of FIG.

The operation until the release operation member 303 is fully pressed (s2 signal is generated) is the same as that in the first embodiment shown in FIG. Omitted. Also, the release operation member 30
3 after the full-press operation of FIG.
Steps that perform the same operations as in the first embodiment shown in FIG. 3 are assigned the same step numbers, and descriptions thereof are omitted.

The flowchart of FIG. 21 is different from the flowchart of FIG. 13 in that step # 431 is provided instead of step # 419 in FIG. 13, and shake correction is started by predictive correction during exposure.

That is, in step # 418, "t
2> T ”, that is, the release operation member 3
03 half-press operation (s1 signal generation) and full-press operation (s2
When a large shake of a component different from a normal camera shake is applied to the camera by the operation, the process proceeds to step # 431, where the correction optical device 311 is driven with the predicted waveform described above.

Thereafter, in step # 421, the film is exposed by opening and closing the shutter. However, it should be noted here that the predicted waveform is a straight line having a constant gradient as shown in FIG. In addition, the correction time is long to correct a large shake. Therefore, the correction optical device 3
The driving stroke of the correction lens in 11 needs to be large, and if the time from the start of the prediction correction in step # 431 to the exposure to the film is long, the correction lens uses up the stroke before the exposure to the film. As a result, there is a risk that prediction correction cannot be performed during exposure.

Therefore, steps # 431 to #
The time until the shutter 421 opens and closes must be set as short as possible.

By following such a flow, a large shake applied to the camera by the release operation can be predicted and corrected, and when a large shake occurs due to the release operation as in the first embodiment described above. The image accuracy can be improved as compared with stopping the shake correction.
However, a normal shake applied to the camera during exposure (not a large shake applied to the camera by a single push operation of the release operation member 303 but a hand shake constantly applied to the camera) cannot be corrected.

As described above, the anti-shake system is controlled by the operation time difference between the half-press and full-press of the release operation member 303. In particular, when the operation time difference is within a predetermined time, the anti-shake operation of the anti-shake system is performed. When the operation mode is changed, that is, in this embodiment, when the operation time difference between the half-press and full-press of the release operation member 303 is within a predetermined time, the shake correction is performed with the predicted target value. The predicted target value is a state of the camera, for example, a focal length of the camera,
The shutter speed of the camera and the release time lag of the camera (the delay time from the exposure operation to the film to the start of the actual exposure) are changed.

As a result, it is possible to correct a large shake occurring when the release operation is disordered, and to improve the image accuracy.

(Third Embodiment) As described in the first embodiment, a large shake at the time of a release operation cannot be detected with high accuracy by the shake detection sensor 312. Although deteriorated, the error output of the shake detection sensor 312 can be predicted in the same manner as the shake waveform at this time can be predicted as in the second embodiment.

Therefore, if this error output is also predicted and canceled out with the error of the shake detection sensor 312, a normal shake superimposed on a large shake caused by a single push operation of the release operation member 303 can be detected at this time. That is, at the same time as predicting a large shake at the time of the single-push operation of the release operation member 303, the error output of the shake detection sensor 312 at this time is also canceled out by the prediction, and only a normal hand shake component is extracted from the shake detection sensor 312. Correction optical device 3 mixed with predicted waveform
The image accuracy can be further improved by driving the shake correction of 11.

FIG. 22 is a flowchart showing the operation of the third embodiment of the present invention based on such a concept. The difference from FIG. 21 is that step # 441 is provided instead of step # 431. Is performed to mix predicted values at the time of exposure, and shake correction is started in step # 420. Note that the configuration of the camera is the same as in FIGS. 17 and 18.

In step # 441, the predicted waveform shown in FIG. 20, a waveform for canceling an error output that may occur in the shake detection sensor 312, and the output of the shake detection sensor 312 are mixed, and based on this signal, Next step # 420
Then, the correction optical device 311 performs shake correction. As a result, it is possible to simultaneously correct a large shake generated at the time of the push operation of the release operation member 303 and a normal shake superimposed thereon.

As described above, since the shake correction is performed by adding the predicted target value to the target from the shake detection sensor (changing the operation mode of the shake correction), a large shake that occurs when the release operation is disordered. Is also corrected, and the image accuracy can be further improved as compared with the second embodiment.

(Fourth Embodiment) In the first embodiment, the image stabilizing system is always on at the time of photographing. However, the fourth embodiment performs the following operations shown in FIGS. 23 and 24. In the camera according to the embodiment, the shake correction can be prohibited during photographing according to the photographer's preference. This is to enable photographing (for example, panning) that intentionally causes camera shake. Note that the configuration of the camera is the same as in FIGS. 17 and 18.

In FIG. 18, reference numeral 704 denotes an image stabilization prohibition switch for prohibiting shake correction at the time of photographing. If shooting is performed after pressing, shake correction will not be performed during shooting.

FIGS. 23 and 24 are flowcharts showing the operation based on the above concept. The difference from the first embodiment shown in FIGS. 12 and 13 is that step # in FIG. 23 corresponding to FIG. FIG. 2 corresponding to FIG.
4 in that step # 452 is added. Step # 441 in FIG. 24 performs the same operation as step # 441 described in the third embodiment shown in FIG. 22, and a description thereof will be omitted.

Here, in step # 451 of FIG.
Looking at the state of the image stabilization prohibition switch 704, when the image stabilization prohibition switch 704 is pressed (ON state), the process skips step # 415 and proceeds to step # 416 in FIG. That is, the image stabilization display is not performed. And step #
If it is determined in step 418 that “t2> T” is not satisfied (when the release operation member 303 is pressed at a stroke), the process proceeds to step # 452, where the state of the anti-vibration switch 704 is reconfirmed. When the shake prohibition switch 704 is turned on, that is, when shake correction is prohibited, the process proceeds to step # 421 to perform an exposure operation.

On the other hand, when the anti-vibration switch 704 is off in steps # 451 and # 452, step # 4
Proceeding to 41, the predicted values are mixed as in FIG. 22, and the flow proceeds to step # 420 to correct the shake.

In step # 418, "t2
> T ”, the process proceeds to step # 420,
Although the correction optical device 311 is driven, the above-described step # 45 is performed.
When the anti-vibration prohibition switch 704 is turned on at 1, the camera is set so as not to perform shake correction. That is, when the image stabilization is off, only the shake correction is not performed, and the main sequence of the image stabilization of the shake detection sensor 312 and the like is operating. This is because the photographer frequently switches between using and not using the image stabilization system. If all the image stabilization systems are turned off, it takes time to activate the image stabilization system each time. This is for preventing the property from being lowered.

Thus, even in a camera in which the photographer can freely turn on and off the anti-shake system, the mobility of the camera is not impaired.

As described above, the anti-vibration switch (or anti-vibration changeover switch) for selecting whether to use or not use the anti-vibration system is provided. Stop the shake correction at the time of exposure,
The shake detection sensor is operated. When it is selected that the image stabilization system is not used, the image stabilization display is not performed, but the shake detection sensor is operated.

As a result, the mobility of the camera can be improved even in a camera system in which the photographer can select ON / OFF of image stabilization.

(Fifth Embodiment) In the second to fourth embodiments described above, a countermeasure against a large shake caused by a single push operation of the release operation member is performed by predictively correcting the correction optical device. Such a shake can be dealt with not only in the image stabilization system but also in the camera sequence.

The simplest method of preventing a failure photograph from being produced in response to a large shake caused by a single push operation of the release operation member is as described in the first embodiment. Locking and prohibiting shooting, but in addition to this, as you can see in FIG.
The large swing caused by the push operation of the release operation member,
It will subside over time. Therefore, when such a shake occurs, a countermeasure against image deterioration can be made by shifting the release timing until the large shake stops (extending the release time lag).

FIG. 25 is a flowchart of a main part of a camera sequence based on such a concept, which will be described below as a fifth embodiment of the present invention.

The difference from the flowchart of FIG. 24 in the fourth embodiment is that step # 441 in FIG.
Is provided in place of step # 461, where the release time lag is extended to wait for a certain time. Then, after waiting for a certain period of time, the process proceeds to step # 420. When the image stabilization is on, shake correction is started and exposure is performed (step # 4).
21).

When the release operation member is pressed at a stroke and the anti-vibration switch is turned on, the release time lag is not extended. This is because when the photographer selects the image stabilization off, the user often needs quick shooting, and in such a case, it is better not to extend the release time lag.

As described above, it is possible to know the state of the shake by observing the timing of the release operation, and it is possible to prevent image deterioration with a simple configuration in which the release time lag of the camera is changed based on the state.

(Sixth Embodiment) The first to the sixth embodiments described above.
In the fifth embodiment, when it is determined that the image stabilization is unnecessary (in the second to fourth embodiments, the shake correction is automatically turned off by the shutter speed or the like, and in the fourth embodiment, the intention of the photographer is also added). ) Described a configuration in which shake correction is not performed during shooting. In these embodiments, the anti-shake system that performs shake correction only at the time of exposure has been described. However, there are also cameras (cameras that perform distance measurement and photometry using an optical system of a TTL system) that can provide advantages by performing shake correction even before exposure, and in such a case, before photographing (during distance measurement and photometry), It is preferable to perform the shake correction (even if the photographer operates the image stabilization off).

FIG. 26 is a flowchart showing the operation of a portion related to image stabilization in such a camera, and this flow is started by a half-press operation (s1 signal generation) of a release operation member of the camera. The circuit configuration of the camera is shown in FIG.
It is assumed that the camera has the same anti-shake switch 704 as shown in FIG.

In step # 571, shake correction is started, and thereafter, although not described in the flow, photometry, distance measurement, lens focusing drive, and the like are performed. At this point, even if the image stabilization OFF operation is performed by the image stabilization prohibition switch 704, the image stabilization is performed, and the photometry and distance measurement accuracy are increased.

In step # 572, the process waits until the release operation member 303 is fully pressed, and when the release operation member 303 is fully pressed, the process proceeds to step # 573, in which the vibration prevention switch 704 is set.
When the image stabilization is off (YES in # 573), the process proceeds to step # 574, and when the image stabilization is on (N in # 573).
O) proceeds to step # 575.

At step # 574, the shake correction is stopped. This is because the photographer wants to turn off the image stabilization, and stops the shake correction after the release operation member 303 is fully pressed (because shooting starts). Next step # 57
In step 5, the film is exposed. Next step # 57
In 6, the state of the anti-vibration switch 704 is determined again, and
If the image stabilization is on, the process returns to step # 572. If the image stabilization prohibition switch 704 is off, the process proceeds to step # 577 to start the shake correction again (this step # 577).
This is because the process proceeds when the image stabilization is off in step # 576, and the shake correction is stopped at this time.) Then, the process returns to step # 572.

As described above, even when the image stabilization is off, the shake correction is performed until the photographing is started.
Accuracy such as distance measurement can be improved. In this way, when the image stabilization is off, only the image stabilization is stopped only at the time of photographing (the image stabilization sensor and the like are kept operating), and the image stabilization is started immediately. State can be restored.

(Correspondence between Invention and Embodiment) In each of the above embodiments, the release operation member 303 is the first operation member of the present invention.
The half-press operation corresponds to the operation of the first operation unit, and the full-press operation corresponds to the operation of the second operation unit. In addition, the shake detection sensor 312 and the correction optical device 311 correspond to the anti-shake device of the present invention, the camera microcomputer 301 corresponds to the anti-shake control device of the present invention, and the display device 313 corresponds to the display device of the present invention.

The correspondence between the components of the embodiment and the components of the present invention has been described above. However, the present invention is not limited to the configuration of the embodiment, and the functions and functions described in the claims are not limited.
Needless to say, any configuration may be used as long as the functions of the embodiment can be achieved.

(Modification) Although the present invention has been described as applied to a compact camera, it is also applicable to a single-lens reflex camera, a digital camera, and a video camera.

Further, the first operating means and the second operating means are assumed to be a two-stage pressing type release operating member, but are not limited to this except for claim 18, and are independent. Operation members may be used.

Further, the present invention may have a configuration in which the above-described embodiments or their techniques are appropriately combined.

[0212]

As described above, according to the present invention, when the operation time difference is shorter than the predetermined time, such as when the first operation means and the second operation means are operated successively, Since disturbance large enough to make shake correction impossible often occurs, the shake correction is not performed, the shake correction is interrupted, or the operation time difference between the first operation means and the second operation means is reduced. Within a predetermined time, when the image stabilizing device is used, the photographing operation by the operation of the second operation means is prohibited, or the start of the photographing operation by the operation of the second operation means is stopped for a predetermined time. Since the photographing sequence is changed so as to be delayed, it is possible to prevent the image stabilizing device from malfunctioning due to a large shake that cannot be corrected and causing image deterioration. It is possible It is possible to provide a camera.

Further, according to the present invention, when the operation time difference is shorter than the predetermined time, such as when the first operation means and the second operation means are operated successively, the shake correction becomes impossible. In many cases, large shakes are added, so instead of the normal image stabilization display (display of the amount of shake, etc.), the camera shake warning display is performed, so that the user is notified that shake correction is not possible, It is possible to provide a camera capable of prompting the user to pay attention to re-doing and holding the camera.

According to the present invention, when the operation time difference is within the predetermined time, the operation time difference is obtained in advance based on the shake caused by the camera by the operation state of the first operation means and the second operation means, and is stored. Then, the shake correction is performed with the predicted target value of the shake correction, and further, the predicted target value is changed to the focal length, shutter speed, or release time lag of the camera (exposure to the recording medium is actually started from the instruction to start the photographing operation). (Delay time until the image is shaken), and the camera shake is corrected. Therefore, even if a large camera shake is applied, it is possible to provide a camera capable of correcting the camera shake and preventing image deterioration. .

Further, according to the present invention, when the operation time difference between the first operating means and the second operating means is within a predetermined time, a large disturbance vibration often occurs such that the vibration cannot be corrected. Therefore, since the photographing sequence is changed so that the photographing operation by the operation of the second operation means is prohibited or the start of the photographing operation by the operation of the second operation means is delayed for a certain period of time, It is possible to provide a camera capable of preventing an image from being deteriorated due to a large shake that cannot be corrected, thereby making it impossible to perform appropriate photographing.

Further, according to the present invention, even if a pressing operation is performed on the second operating means following the first operating means, the photographing operation is prohibited unless the vibration isolator is properly operated. 1
Until the pressing operation of the operating means is stopped and the pressing operation of the first operating means is performed again, the prohibiting state of the photographing operation is maintained, so the photographing prohibiting state is inadvertently released. As a result, the photographer may take a picture at a photographing opportunity not desired by the photographer, or the photographer may operate the operation means more forcibly without noticing that the photographing prohibited state has been set. This makes it possible to provide a camera that can prevent the occurrence of image degradation and image degradation.

Further, according to the present invention, the first operation means for starting a predetermined operation and the first operation means used when the first operation means is being operated to start another operation are provided. A second operating means, wherein the first operating means and the second operating means are provided.
Because the vibration isolator is controlled by the operation time difference of the operation means of the above, the vibration isolator is malfunctioned because a large shake that cannot be corrected is applied, and the function of the device is impaired. Thus, it is possible to provide a device with an anti-vibration function that can prevent such a situation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a mechanical configuration of a vibrating gyroscope provided in a compact camera according to each embodiment of the present invention.

FIG. 2 is a block diagram showing a signal processing system of the vibration gyro of FIG.

FIG. 3 is a perspective view showing an example of a finder display device of the compact camera according to each embodiment of the present invention.

FIG. 4 is a diagram illustrating lighting timing of an LED for realizing image stabilization display in the finder display device of FIG. 3;

FIG. 5 is a diagram showing an example of a display in the finder in the finder display device of FIG. 3;

FIG. 6 is a block diagram showing a signal processing system of a finder display device having the image stabilizing display function of FIG. 3;

FIG. 7 is a flowchart showing an operation when performing image stabilization display using the signal processing system of FIG. 6;

FIG. 8 is a perspective view showing an example of a mechanical configuration of a correction optical device provided in the compact camera according to each embodiment of the present invention.

9 is an enlarged side view showing details of a feed screw portion fixed to the output shaft of the motor shown in FIG. 8 and a modified example thereof.

10 is an enlarged perspective view showing a mechanism for moving a lens holder by the motor of FIG. 8;

FIG. 11 is a block diagram showing a circuit configuration of the compact camera according to the first embodiment of the present invention.

FIG. 12 is a flowchart showing a part of a series of operations of the camera in FIG. 11;

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

FIG. 14 is a flowchart for explaining in detail a portion for performing release lock until the output of the shake detection sensor is stabilized in the camera of FIG. 11;

FIG. 15 is a flowchart mainly illustrating an operation portion when the camera does not use the image stabilization system in FIG. 11;

FIG. 16 is a diagram showing a relationship between the sequence of the camera in FIG. 11 and an image stabilization system.

FIG. 17 is a block diagram showing a circuit configuration of a compact camera according to a second embodiment of the present invention.

18 is a side view of the camera of FIG.

19 is a diagram showing a camera shake waveform applied to the camera of FIG.

20 is an enlarged view showing a shake when the release operation member of the camera of FIG. 17 is pressed at a stretch.

FIG. 21 is a flowchart showing an operation of a main part of the compact camera according to the second embodiment of the present invention.

FIG. 22 is a flowchart showing an operation of a main part of the compact camera according to the third embodiment of the present invention.

FIG. 23 is a flowchart showing a part of a series of operations of the compact camera according to the fourth embodiment of the present invention.

FIG. 24 is a flowchart showing a continuation of the operation in FIG. 23;

FIG. 25 is a flowchart showing an operation of a main part of the compact camera according to the fifth embodiment of the present invention.

FIG. 26 is a flowchart showing an operation of a main part of the compact camera according to the sixth embodiment of the present invention.

FIG. 27 is a perspective view showing a compact camera provided with a conventional image stabilizing system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Vibrator 12 Magnet 20 Coil 21 Photoreflector 41 Light source 42 Mask 43, 44 Vibration detection sensor 45, 46 Imaging lens 53 Vibration prevention index 81 MPU 84 LED 85 Drive circuit 86, 88 Vibration detection sensor 87, 89 Position detection sensor 201 Lens holder 202 Correction lens 203 Main plate 206, 210 Motor 207, 211 Feed screw 208 Nut 209, 213 Spring 301 Camera microcomputer 303 Release operation member 311 Correction optical device 312 Shake correction sensor 313 Display device 134 Prediction amount generation circuit

Claims (19)

[Claims] An image stabilizing device for correcting a shake, a first operation unit for starting a shooting preparation operation, and a second operation unit for starting a shooting operation,
A camera comprising: an image stabilization control unit that controls the image stabilization device based on an operation time difference between the first operation unit and the second operation unit. 2. The apparatus according to claim 1, wherein the image stabilization control means controls the operation and non-operation of image stabilization by the image stabilization device based on an operation time difference between the first operation means and the second operation means. Item 1. The camera according to Item 1. 3. The camera according to claim 2, wherein the image stabilization control unit does not perform shake correction when the operation time difference is within a predetermined time. 4. The camera according to claim 2, wherein the image stabilization control unit interrupts shake correction when the operation time difference is within a predetermined time. 5. The camera according to claim 1, further comprising a display unit that displays a state of the image stabilizing apparatus based on an operation time difference between the first operation unit and the second operation unit. 6. The camera according to claim 5, wherein said display means displays a camera shake warning display when said operation time difference is within a predetermined time. 7. The camera according to claim 1, wherein the image stabilization control unit changes an operation mode of image stabilization performed by the image stabilization device when the operation time difference is within a predetermined time. 8. The apparatus according to claim 7, wherein when the operation time difference is within a predetermined time, the image stabilization control unit performs image stabilization using a predicted target value of image stabilization stored in advance. The described camera. 9. The image stabilizing apparatus includes a shake detecting unit that detects a shake and a correcting unit that corrects a shake. 8. The camera according to claim 7, wherein a shake correction is performed using a shake prediction target value stored in advance and an output from said shake detection means. 10. The method according to claim 1, wherein the predicted target value of the shake correction is obtained in advance based on a shake caused to the camera by an operation state of the first operation means and the second operation means. The camera according to claim 8. 11. The camera according to claim 10, wherein the predicted target value of the shake correction is changed according to a focal length of the camera. 12. The camera according to claim 10, wherein the predicted target value of the shake correction is changed by a shutter speed of the camera. 13. The camera according to claim 10, wherein the predicted target value of the shake correction is changed by a release time lag of the camera. 14. A camera having a first operation means for starting a shooting preparation operation and a second operation means for starting a shooting operation, wherein the first operation means and the second operation means are provided. A camera having a photographing sequence changing means for changing a photographing sequence according to an operation time difference of the means. 15. The camera according to claim 14, wherein the photographing sequence changing unit prohibits a photographing operation by an operation of the second operation unit when the operation time difference is within a predetermined time. 16. The photographing sequence changing unit according to claim 14, wherein when the operation time difference is within a predetermined time, the start of the photographing operation by the operation of the second operation unit is delayed by a predetermined time. camera. 17. A camera comprising: a vibration reduction device for correcting a shake, a first operation unit for starting a shooting preparation operation, and a second operation unit for starting a shooting operation. Even if the operation means is operated, the photographing operation is prohibited if the vibration isolator is not properly operated, the operation of the first and second operation means is temporarily stopped, and the first operation means is again stopped A camera comprising a photographing prohibition unit for holding the photographing operation prohibition state until the above operation is performed. 18. The image forming apparatus according to claim 18, wherein the first and second operating means are two-stage push-type switch members. Even if it is performed, the photographing operation is prohibited unless the vibration isolator is properly operated, and the pressing operation of the first operating means is stopped until the pressing operation of the first operating means is performed again. 18. The camera according to claim 17, wherein a state in which the photographing operation is prohibited is held. 19. A vibration isolator for correcting a shake, first operation means for starting a predetermined operation, and used when the first operation means is being operated to start another operation. A vibration control device having a vibration control function having a second operation means for controlling the vibration control device based on an operation time difference between the first operation means and the second operation means. A device with an anti-vibration function, characterized in that: