JPH07261230A - Image blurring correcting device for camera - Google Patents

Abstract

PURPOSE:To provide an image blurring correcting device for a camera capable of restarting the correction of image blurring as soon as the image blurring degree gets within a correctable range again after the image blurring degree exceeds the correctable range and informing that image blurring which can not be corrected occurs in such a case. CONSTITUTION:This device is equipped with a correction lens for cancelling the image blurring on an image-formation surface caused by camera shake, a driving mechanism moving the correction lens in a direction where a subject image formed by a photographing optical system is not deviated from the image- formation surface in spite of the deviation of a photographing optical axis from a subject, a judging mechanism judging whether or not the image blurring exceeding the correctable range by the correction lens occurs, a control mechanism 20 controlling the driving mechanism so that the movement of the correction lens may be stopped in the case the judging means judges that the image blurring exceeding, the correctable range by the correction lens occurs, and a lamp 24 informing that the image blurring exceeding the correctable range occurs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows the camera to move slightly even when the shutter is open due to camera shake or the like.
The present invention relates to an image blur correction device for a camera that drives a correction optical system so that a subject image does not move on a film surface by a photographing optical system.

[0002]

2. Description of the Related Art Conventionally, for example, if the user is unfamiliar with shooting with a camera, or if the camera is not held properly, a slow shutter is used for a dark subject, or when the photographer shoots while moving, a shutter release is required. Since the photographing optical axis of the camera slightly moves with respect to the subject due to camera shake, so-called image blur occurs in which the image of the subject moves on the film surface during exposure. To prevent such image blurring, increase the shutter speed by making the taking lens brighter or increasing the film sensitivity to reduce the effect of camera shake, or
It can be mentioned that the camera shake is eliminated by the skill of the photographer, but in any case, it is not possible to eliminate the image blur at all.

Here, in order to positively prevent such image blurring, conventionally, when a camera shake occurs, the magnitude of the camera shake is detected by an angular velocity sensor (or an angular acceleration sensor), According to the detection result, there has been proposed a device that moves the correction lens in a direction opposite to the direction of the image blur that may occur due to the camera shake to cancel the blur of the subject image on the film surface.

[0004]

However, in such a conventional image blur correction device, there is a limit to the correction of the image blur due to its configuration. Therefore, when an image blur occurs due to a camera shake that exceeds the limit range of the correction, the image blur correction cannot be performed, and a countermeasure against this is desired.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a main object of the present invention is to continue the correction as much as possible even when the image blur exceeds the limit range of the correction. It is to provide an image blur correction device for the camera.

Another object of the present invention is to provide an image blur correction device for a camera, which can inform a photographer that image blur cannot be corrected.

[0007]

In order to solve the above-mentioned problems and to achieve the object, an image blur correction device for a camera according to the present invention, according to the first aspect of the present invention, forms an image plane due to camera shake. A correction optical system for canceling the image blur on the above, and the correction optical system for preventing the subject image formed by the photographing optical system from being shaken with respect to the image forming surface regardless of the blur of the photographing optical axis with respect to the subject. Driving means, a detection means for detecting the occurrence of image blur exceeding the correctable range by the correction optical system, and the detection means detecting the image blur exceeding the correctable range. And a control means for interrupting the driving of the correction optical system by the driving means.

According to a fifth aspect of the present invention, there is provided an image blur correction device for a camera, which comprises a correction optical system for canceling the image blur on the image plane due to camera shake.
Driving means for driving the correction optical system so as to prevent the subject image formed by the photographing optical system from moving with respect to the image formation plane regardless of the blurring of the photographing optical axis with respect to the subject, and the correctable range by the correction optical system. Detection means for detecting the occurrence of an image blur exceeding the range, and when the detection means detects that an image blur exceeding the range that can be corrected by the correction optical system is detected, It is characterized by comprising an informing unit for informing that an excessive image blur has occurred.

According to an eighth aspect of the present invention, there is provided an image blur correction device for a camera, which comprises a correction optical system for canceling an image blur on an image forming plane due to camera shake.
Driving means for driving the correction optical system so as to prevent the subject image formed by the photographing optical system from moving with respect to the image formation plane regardless of the blurring of the photographing optical axis with respect to the subject, and the correctable range by the correction optical system. A detection means for detecting the occurrence of an image blur exceeding the above range, and when the detection means detects that an image blur exceeds the correctable range by the correction optical system, It is characterized by comprising a control means for controlling the driving means so as to interrupt the driving, and an informing means for informing that the image blur exceeding the correctable range has occurred.

According to the eighteenth aspect of the present invention, there is provided an image blur correction device for a camera according to the eighteenth aspect, in which a camera shake detection means for detecting camera shake and a correction optical system provided in addition to the photographing optical system are provided. And a drive unit for driving the correction optical system, and the drive unit is controlled based on the detection result of the camera shake detection unit to form a subject image formed by the photographing optical system by the correction optical system. An image blur compensating device for a camera, comprising: a control means for canceling the image blur by moving in a direction parallel to the plane, wherein the image blur exceeds a compensable range by the compensating optical system based on the detection result of the detecting means. And a drive of the correction optical system by the drive unit when it is detected by the limit detection unit that the image blur exceeds the correctable range. It is characterized in that a interrupting interruption means.

According to a nineteenth aspect of the present invention, there is provided an image blur correction device for a camera according to the nineteenth aspect, in which a camera shake detection means for detecting camera shake and a correction optical system provided in addition to the photographing optical system are provided. And a drive unit for driving the correction optical system, and the drive unit is controlled based on the detection result of the camera shake detection unit to form a subject image formed by the photographing optical system by the correction optical system. An image blur compensating device for a camera, comprising: a control means for canceling the image blur by moving in a direction parallel to the plane, wherein the image blur exceeds a compensable range by the compensating optical system based on the detection result of the detecting means. When the limit detection unit that detects that the image blurring exceeds the correctable range is detected by the limit detection unit, the image blurring that exceeds the correctable range occurs. It is characterized in that a and informing means for informing that.

According to a twentieth aspect of the present invention, there is provided an image blur correction device for a camera according to the twentieth aspect, in which a camera shake detection means for detecting camera shake and a correction optical system provided in addition to the photographing optical system are provided. And a drive unit for driving the correction optical system, and the drive unit is controlled based on the detection result of the camera shake detection unit to form a subject image formed by the photographing optical system by the correction optical system. An image blur compensating device for a camera, comprising: a control means for canceling the image blur by moving in a direction parallel to the plane, wherein the image blur exceeds a compensable range by the compensating optical system based on the detection result of the detecting means. And a drive of the correction optical system by the drive unit when it is detected by the limit detection unit that the image blur exceeds the correctable range. Interrupting means for interrupting, and an informing means for informing that the image blur exceeding the correctable range has occurred when the limit detecting means detects that the image blur exceeds the correctable range. The feature is that it is provided.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A configuration of an embodiment of an image blur correction device for a camera according to the present invention is applied to an interchangeable photographing lens for a single-lens reflex camera with reference to the accompanying drawings. .

{Outline of Embodiment} In this embodiment,
When a large image blur that cannot be corrected by this image blur correction device occurs on the image forming surface (film surface), such image blur that cannot be corrected occurs. That is, the photographer is informed via the informing means that the photographed subject image is “blurred” (specifically, the image blur alarm lamp 24 is turned on), and the correction control operation is interrupted. Correction lens 1
2 is held at a position that defines the maximum of the correctable range, and when the detected image blur returns to the correctable range, the correction control operation, that is, the displacement control operation of the correction lens 12 can be corrected. The correction control operation can be promptly restarted by continuously restarting from a position that defines the maximum range.

{Schematic Description of Image Shake Correction Device} In the following description, a plane parallel to the image plane of the camera in which this interchangeable photographing lens is mounted (that is, orthogonal to the photographing optical axis O) is referred to as "vertical" An axis which intersects the photographing optical axis O in this vertical plane and divides the camera up and down is referred to as a “plane”, and an axis which divides the camera into the upper and lower sides is referred to as a “horizontal axis a”, and an axis which divides the camera into the left and right is referred to as a “vertical axis b”. I will call it.

As shown in FIGS. 1 and 2, the image blur correction device 10 includes a photographing lens (imaging system lens) and this photographing lens (imaging system) in a photographing optical system of an interchangeable photographing lens (not shown). The image plane of the subject image by the lens), that is,
It is arranged between the film surface at the image forming position (the image pickup element surface if this camera is an electronic camera). The image blur correction device 10 mainly includes a correction lens 12, a support mechanism 14 that supports the correction lens 12 so as to be displaceable in the vertical plane described above, and the horizontal axis a and the vertical axis described above for the correction lens 12. A drive mechanism 16 that is driven to displace in the direction along b respectively, and when camera shake occurs, the camera shake is detected as an angular velocity applied to the camera, which will be described later.
The occurrence of the image blur according to the two angular velocity sensors 18a and 18b, the magnitude of the image blur on the image forming surface calculated based on the detection results from the angular velocity sensors 18a and 18b, and the direction in which the image blur occurs. A control circuit 20 for driving and controlling the drive mechanism 16 so that the subject image moves on the film surface in a direction opposite to the direction, and as will be described later in detail, the control circuit 20 is provided in the viewfinder 22 of the camera, Blur correction device 10
Image blur alarm lamp 2 as a notifying means for notifying the photographer that the image blur has occurred in the subject image being photographed when the image blur exceeds the image blur compensable range in
And 4 are provided.

{Specific Description of Individual Constituent Elements of Image Blur Correction Apparatus} Next, a specific structure of the image blur correction apparatus 10 will be described. [Description of Correction Lens 12] First, the correction lens 1 described above
2 is held in the correction lens holding barrel 26 as shown in FIG. The correction lens holding cylinder 26 is composed of a cylinder body 26.
a and an outer flange portion 26b integrally formed at the front end of the cylinder body 26a.

[Description of Support Mechanism 14] This correction lens 1
As shown in FIGS. 1 and 2, a support mechanism 14 for movably supporting 2 in a vertical plane includes a fixed support member 28 arranged in parallel with the vertical plane, and a vertical axis b from the photographing optical axis O. And a first swing member 30 supported by the fixed support member 28 so as to be swingable around a _first swing axis A ₁ which is eccentric along the axis of the shooting and is set parallel to the shooting optical axis O. A second lens eccentric from the optical axis O along the horizontal axis a and set parallel to the photographing optical axis O.
And a second rocking member 32 supported by the first rocking member 30 so as to be rockable around the rocking axis line A ₂ . It is fixed to the second swing member 32.

More specifically, the fixed support member 28 is fixed to a fixed member such as an outer cylinder of an interchangeable photographing lens (not shown), and has a rectangular shape centered on the photographing optical axis O at the center thereof. The aperture for restricting the displacement of the corrected lens 12 (that is, the correctable range MA in the image blur correction device 10)
Opening) 28a is provided to define X _a, the MAX _b. A tube body 26a of the correction lens holding tube 26 fixed to the second swing member 32 projects into the opening 28a, and the size of the opening 28a is such that the outer peripheral surface of the tube body 26a is located at the end surface of the opening 28a. By making contact, this correction device 10
Correctable range MAX _a, MA of image blur is corrected by
It is set so as to mechanically regulate _Xb within a predetermined range. A first swing center hole 28b is formed on the outer peripheral portion of the fixed support member 28 at a position eccentric from the photographing optical axis O along the vertical axis b.

On the other hand, in front of the fixed support member 28,
A first swing member 30 is arranged. A first swing shaft 34, which is rotatably inserted into the first swing center hole 28b, is provided on the outer peripheral portion of the first swing member 30 so as to project therefrom.
As a result, the first swing member 30 is swingably supported about the first swing axis A ₁ in the vertical plane. The first swing member 30 includes the correction lens holding cylinder 26 described above.
An opening 30a through which the cylinder body 26a is inserted is provided. Further, a second swing center hole 30b is formed on the outer peripheral portion of the first swing member 30 at a position eccentric from the photographing optical axis O along the horizontal axis a. Furthermore, the first swing shaft 3 is centered on the photographing optical axis O of the first swing member 30.
A first driven arm 36, which extends along the vertical axis b from here, is integrally formed at the edge opposite to the side on which 4 is formed. At the intermediate portion of the first driven arm 36, the first female screw hole 36 set parallel to the horizontal axis a is formed.
It is formed in a state where a penetrates.

A second swing member 32 is arranged immediately in front of the first swing member 30. A second swing shaft 38 that is rotatably inserted into the second swing center hole 30b is provided on the outer peripheral portion of the second swing member 32 so as to project. The moving member 32 is swingably supported around the second swing axis A ₂ in the vertical plane. The second swinging member 32 is formed in a circular shape with the photographing optical axis O as a center, and has an opening 32a for fixing the outer periphery of the cylinder body 26a of the correction lens holding cylinder 26 described above. Further, at the end edge of the second swinging member 32 on the side opposite to the side where the second swinging shaft 38 is formed with the photographing optical axis O as the center, the second edge extending from here along the horizontal axis a. Two driven arms 40 are integrally formed. A second female screw hole 40a, which is set parallel to the vertical axis b, is formed in the middle of the second driven arm 40 so as to penetrate therethrough.

In this way, the correction lens holding cylinder 26
The correction lens 12 held by is independent of the fixed support member 28 about the first swing axis A ₁ and the second swing axis A ₂ in the vertical plane via the support mechanism 14. It will be swingably supported in this state. As a result, the optical axis of the correction lens 12 is deviated from the photographing optical axis O in the vertical plane, and the aperture 2 is kept in a state of maintaining the parallel state with the photographing optical axis O.
It is possible to displace to an arbitrary position within the correctable range MAX mechanically defined by 8a. In other words,
The image blur exceeding the correctable range MAX cannot be corrected by the image blur correction device 10.

[Description of Driving Mechanism 16] On the other hand, the driving mechanism 16 for displacing and driving the correction lens 12 includes the first swing member 3
0 for swinging and driving 0 around the first swing axis A _1, and for swinging and driving the second swing member 32 around the second swing axis A _2. Second correction motor 4
4 and. Here, the first correction motor 42 is attached to the front surface of the fixed support member 28 with its drive axis parallel to the horizontal axis a. A first drive screw shaft 46 screwed into a first female screw hole 36a formed in the first driven arm 36 is coaxially fixed to the drive shaft of the first correction motor 42. Therefore, when the first correction motor 42 rotationally drives this drive shaft, the first rocking member 30 is rocked around the first rocking axis A ₁ . That is, when the swing angle of the first swing member 30 is in the minute range, the optical axis of the correction lens 12 is displaced and driven along the horizontal axis a in the vertical plane.

The second correcting motor 44 is mounted on the front surface of the first swinging member 30 with its drive axis parallel to the vertical axis b. The drive shaft of the second correction motor 44 has a second drive screw shaft 4 that is screwed into a second female screw hole 40a formed in the second driven arm 40.
8 is fixed coaxially. Therefore, when the second correction motor 44 rotationally drives this drive shaft, the second swing member 32 is swing-driven around the second swing axis A ₂ . That is, when the swing angle of the second swing member 32 is in the minute range, the optical axis of the correction lens 12 is displaced and driven along the vertical axis line b in the vertical plane.

Thus, in this one embodiment,
The optical axis of the correction lens 12 can be displaced and driven to an arbitrary position by the drive mechanism 16 in the vertical plane from the photographing optical axis O while keeping the state parallel to the photographing optical axis O of the photographing lens. .

[Explanation of Angular Velocity Sensors 18a, 18b] Here, the above-mentioned two angular velocity sensors 18a, 18b are
They are attached to a lens barrel (not shown) so that their detection directions are orthogonal to each other. Specifically, the first angular velocity sensor 18a can independently detect the component of the swing shake along the horizontal axis a, and the second angular velocity sensor 18b can measure the swing shake vertical. Each is configured so that the component along the axis b can be detected independently.

[Description of Current Position Detection Sensors 50a, 50b] Here, the current swing angular positions of the first and second swing members 30, 32 (ie, displacement along the horizontal axis a and the vertical axis b, respectively). 1 and 2 for the first and second current position detection sensors 50a and 50b for respectively detecting the
Will be described again.

First, the first and second driven arms 36, 4
Permanent magnets 52a and 52b are fixed to the respective tips of 0. Here, on the fixed support member 28, at the position facing the tip of the first driven arm 36 in a state along the vertical axis b (that is, the swing angle from the vertical axis b is zero), the above-mentioned first The current position detection sensor 50a of No. 1 is fixed. Here, the first current position detection sensor 50
a is an MR sensor (magneto re
When the first driven arm 36 is in a state along the vertical axis b, the output value thereof is set to the minimum (for example, a reference voltage of 0v), and The output value of the first swing member 30 (that is, the first driven arm 36) is changed according to the swing around the _first swing axis A ₁ .

On the first swing member 30, a position facing the tip of the second driven arm 40 in a state along the horizontal axis a (that is, the swing angle from the horizontal axis a is zero). The second current position detection sensor 50b described above is fixed. Here, the second current position detection sensor 50
b is an MR sensor (magneto re
When the second driven arm 40 is in a state along the horizontal axis a, the output value thereof is set to the minimum (for example, a reference voltage of 0v), and The output value is changed in accordance with the swing of the second swing member 32 (that is, the second driven arm 40) around the _second swing axis A ₂ .

Since the first and second current position detection sensors 50a and 50b are configured as described above, the correction lens 1
The current positions of the two optical axes can be detected with certainty. That is, these first and second current position detection sensors 50a,
The current image blur correction position (or the current image blur correction amount) when the image blur correction operation is executed can be reliably detected via 50b.

[Explanation of Image Blur Alarm Lamp 24] Here, as a feature of this embodiment, as shown in FIG. 4, a red lamp is provided on the outer periphery of the viewfinder 22 of the camera. An image blur alarm lamp 24 is provided so that it can be turned on. The red lamp is composed of an LED emitting red light in this embodiment. The image blur alarm lamp 24 is controlled by a control circuit 20, which will be described later, based on lighting control, and a correctable range (± MAX) along the horizontal axis a and the vertical axis b in the image blur compensating apparatus 10 is controlled.
_a, when the image blur beyond either ± MAX _b) occurs, is set so as to be turned on and driven.

{Explanation of Control Circuit 20} [Explanation of Configuration of Control Circuit 20] As shown in FIG.
The control circuit 20 described above, based on the detection result of the image blur via the first and second angular velocity sensors 18a, 18b,
The drive mechanism 16 is driven and controlled, and the image blur alarm lamp 24, which is a feature of this embodiment, is lit and controlled, and the image capturing operation of the camera is controlled as a whole including the image blur control operation. And a CPU 54 configured as described above.

The first input port PI ₁ of this CPU 54
Is in a state in which the photometric switch 56 of the camera is pulled up by the first pull-up resistor 58, and the release switch 60 of the camera is _second in the second input port PI 2.
In the state of being pulled up by the pull-up resistor 62 of
Are connected to each other. Here, the photometric switch 56 is turned on by half-pressing a release button (not shown) of the camera, and the release switch 60 is turned on by fully pressing the release button.

Here, when an ON signal is input to the first input port PI ₁ , that is, when the photometry switch 56 is turned on by half-pressing the release button, the CPU 54 outputs the subject light via a photometry mechanism (not shown). The photometric operation is executed to calculate the exposure value (Ev), and the control operation is performed so as to calculate the aperture value (Av) and the exposure time (Tv) required for photographing based on the exposure value. When the ON signal is input to the second input port PI ₂ , that is, when the release switch 56 is turned on by fully pressing the release button, the CPU 54 sets the aperture value (not shown) of the taking lens to the aperture value described above. The control operation is performed such that the movable reflection mirror (not shown) is flipped up and driven, and the shutter mechanism (not shown) is release-driven at a predetermined shutter speed.

On the other hand, the first analog / digital conversion input terminal AD ₁ of the CPU 54 has a first angular velocity sensor 18a.
However, the second analog / digital conversion input terminal AD
_{A second} angular velocity sensor 18b is connected to each of the two. First and second analog / digital conversion input terminal AD _1, AD ₂ via the first and second angular velocity sensors 18a, shake detection information along each horizontal axis a and a vertical axis b from 18b is the CPU54 Will be taken into.

The first current position detection sensor 50a is provided at the third analog / digital conversion input terminal AD ₃ of the CPU 54, and the second current position is provided at the _fourth analog / digital conversion input terminal AD _4. The detection sensors 50b are respectively connected. Via the third and fourth analog / digital conversion input terminals AD ₃ and AD ₄ , from the first and second current position detection sensors 50a and 50b in the horizontal axis a and the vertical axis direction b in the vertical plane, respectively. The current position of the correction lens 12 along the line, that is, the current displacement amount detection information from the photographing optical axis O is taken into the CPU 54.

As shown in FIG. 3 again, the image blur alarm lamp 24 has its cathode connected to the output port PO of the CPU 54 constituting the control circuit 20, and has its anode pulled up via the pull-up resistor 66. From the output port PO, which will be described in detail later in a control operation, the calculation result of the correction amount for correcting the image blur in the arithmetic processing of the CPU 54 can be corrected by the image blur correction device 10. When it is determined that the correction amount exceeds the range (MAX), in detail, one of the correction amount along the horizontal axis a and the correction amount along the vertical axis b can be corrected (± MAX _a , ± MAX When it is determined that the value exceeds MAX _b ), the output port PO is brought to the “L” level, which is configured to drive the image blur alarm lamp 24 to light.

In addition, the first digital signal of the CPU 54 /
The above-mentioned first correction motor 4 is connected to the analog conversion output terminal DA ₁ via the first motor drive amplifier 64a.
2 is also the second digital / analog conversion output terminal D
To A ₂ , via the second motor driving amplifier 64b,
The above-mentioned second correction motors 44 are respectively connected. From the first and second digital / analog conversion output terminals DA ₁ and DA ₂ , the first and second angular velocity sensors 18 will be described in detail in a control procedure described later.
Based on the detection results from a and 18b, the first and second correction motors 42 and 44 corresponding to the swing amounts of the first and second swing members 30 and 32 required to correct the camera shake.
A drive signal for driving the is output.

[Description of Control Operation in Control Circuit 20]
Next, referring to the flowcharts shown in FIGS. 5 to 7,
An image blur correction control operation for correcting image blur due to camera shake in the CPU 54 constituting the control circuit 20 will be described.

First, when a main power switch (not shown) of the camera is turned on, the CPU 54 performs, as an initialization process, a DC component in the horizontal axis direction based on the null voltage output from the first angular velocity sensor 18a (that is, camera shake). The offset value of the detection signal in the horizontal axis direction) and the digital variable value V _3a indicating the direct current component in the horizontal axis direction based on the slow camera shake and the digital swing displacement value V _4a described later in the horizontal axis direction are cleared. At the same time, the DC component in the vertical axis direction based on the null voltage output from the second angular velocity sensor 18b (that is, the offset value in the vertical axis direction of the camera shake detection signal) and the DC component in the vertical axis direction based on the slow camera shake. a digital variable value V _3b showing a vertical axial direction and a digital oscillating displacement value V _4b cleared (step S1).

Thereafter, an analog detection signal from the first angle sensor 18a as a camera shake detection signal along the horizontal axis a is read from the analog / digital conversion input terminal AD ₁ and the read analog signal is digitally converted. The digital detection value V _1a in the horizontal axis direction is obtained, and the analog detection signal from the second angle sensor 18b as the camera shake detection signal in the direction along the vertical axis b is read from the analog / digital conversion input terminal AD _2. The read analog signal is digitally converted to obtain a digital detection value V _1b in the vertical axis direction (step S2).

Then, in order to eliminate the influence of the above-mentioned DC component, first, the digital detection value V _{1a in the} horizontal axis direction is obtained.
By subtracting the digital variable value V _3a indicating the DC component from the above, the angular velocity value V _2a along the horizontal axis a is calculated, and the digital variable value V _3a indicating the DC component is calculated for the angular velocity value V _2a . A digital variable value V _3a is newly calculated and defined by adding a value divided by a coefficient K _1a of ₁ , and a digital variable value indicating the above-mentioned DC component from the digital detection value V _{1b in} the vertical axis direction. By subtracting V _3b , the angular velocity value V _2b along the vertical axis b is calculated, and
By adding a value obtained by dividing the digital variable value V _3b indicating the DC component by the first coefficient K _1b to the angular velocity value V _2b ,
The digital variable value V _3b is newly calculated and defined (steps S3 and S4).

Thereafter, it is judged whether or not the photometric switch 56 is turned on (step S5), and unless the photometric switch 56 is turned on, the above-mentioned steps S2 to S4 are repeatedly executed, and in terms of hardware, A differential amplifier for obtaining the difference between the digital detection value V _1a (V _1b ) and the digital variable value V _3a (V _3b ) and the digital variable value V by removing the DC component of the angular velocity value V _2a (V _2b ). _It performs a function equivalent to a so-called negative feedback circuit composed of a high-pass filter for outputting as _3a (V _3b ). Then, when the photometric switch 56 is turned on, the process exits from this repeating loop and shifts to the next control procedure. Here, the digital variable values V _3a and V _3b used in step S3 described above are 0 in the first calculation because they are initialized in step S1, but in the second and subsequent repeated calculations, The value calculated in S4 will be used.

When executing S2 to S5 described above, the first coefficients K _1a and K _1b described above are small values (specifically, smaller than the second coefficients K _2a and K _2b described later, respectively). Value). As a result, even if there is no camera shake and the angular velocity sensors 18a and 18b are to detect the angular velocity 0 respectively, the angular velocity sensors 18a and 18b actually output due to the presence of a so-called null voltage that is a DC component. From the state where the value (that is, the value of the angular velocity detected by the angular velocity sensors 18a and 18b) does not become 0, the residual DC output component becomes substantially 0 level by passing through the negative feedback circuit in hardware as described above. It will be possible to set the time until it becomes as short as possible.

As a result, from the time the main power switch is turned on to the time the release button is half-pressed and the photometric switch 56 is turned on, for example, immediately after the main power of the camera is turned on, or to determine or change the composition. However, after the camera is greatly panned in one direction, it takes a long time for the residual DC output component to reach substantially 0 level. Inconveniences such as missing a chance will be avoided.

On the other hand, once the photometric switch 56 is turned on, the photometric operation of the subject light is executed through a photometric mechanism (not shown) to calculate the exposure value (Ev), and the exposure value (Ev) is required for photographing. The aperture value (Av) and the exposure time (Tv) are calculated (step S6). Then, an analog detection signal from the first angle sensor 18a as a camera shake detection signal along the horizontal axis a is read from the analog / digital conversion input terminal AD _1, and the read analog signal is converted into a digital signal in the horizontal axis direction. The digital detection value V _1a is obtained, and the analog detection signal from the second angle sensor 18b as the camera shake detection signal along the vertical axis b is converted into analog /
The digital signal is read from the digital conversion input terminal AD _2, and the read analog signal is digitally converted to obtain the digital detection value V _1b in the vertical axis direction (step S7).

Then, in order to be able to correct the image blur due to the slow camera shake of the camera as described above, the above-mentioned DC component is shown from the digital detection value V _1a in the horizontal axis direction. by subtracting the digital variable value V _3a, firstly, to calculate the angular velocity values V _2a of the horizontal axis direction, the digital variable value V _3a showing the direct current component with respect to the angular velocity values V _2a in the second coefficient K _2a By newly calculating the digital variable value V _3a by adding the divided value, the digital variable value V _3b indicating the DC component is subtracted from the digital detection value V _{1b in} the vertical axis direction. First, the angular velocity value V _2b in the vertical axis direction is calculated, and a value obtained by dividing the angular velocity value V _2b by the digital variable value V _3b indicating the DC component by the second coefficient K _2b is added. In desi Defining re-calculating the Le variable value V _3b (step S8, S9).

Thereafter, it is judged whether or not the release switch 60 is turned on (step S10), and unless the release switch 60 is turned on, the process returns to the above-mentioned step S5, and the photometric switch 56 is turned on at this step S5. As long as it is determined that the above-mentioned step S6
Through step S9 is repeatedly executed. Then, when the release switch 60 is turned on, the process exits from this repeating loop and shifts to the next control procedure. still,
Before the release switch 60 turns on, the photometric switch 5
If 6 is turned off, steps S2 to S described above are performed.
The repetition loop of 5 will be executed again.

Here, as the digital variable values V _3a and V _3b used in step S8 described above, the values calculated in step S4 described above are used in the initial calculation. As a result, the DC components such as the null voltage of the first and second angular velocity sensors 18a and 18b (that is, the offset amount of the camera shake detection signal) are removed in advance. On the other hand, the above-mentioned second coefficients K _2a and K _2b are set to large values (specifically, values larger than the above-mentioned first coefficients K _1a and K _1b, respectively). As a result, the above-described high-pass filter sets the pass band up to the respective low frequency regions when filtering the digital detection value V _1a (V _1b ).

Thus, in step S8,
The angular velocity value V is the difference between the digital variable value V _3a (V _3b ) from which the DC component based on the null voltage has been removed and the digital detection value V _1a (V _1b ) that has been set to the pass band up to the low frequency region.
_2a (V _2b ) will be calculated. Therefore, the angular velocity value V _2a (V _2b ) calculated in this step S8 is the normal output of the angular velocity sensor 18a (18b), which includes not only small camera shake but also slow camera shake. Is a value that properly reflects, that is, a value that directly represents the direction and size of the detected camera shake.

After that, once the release switch 60 is turned on, the aperture (not shown) of the taking lens is driven so as to achieve the above-mentioned aperture value, the movable reflecting mirror (not shown) is flipped up, and the shutter (not shown) is also driven. The mechanism is release-driven at a predetermined shutter speed (step S
11). After that, the image blur correction operation is started via the image blur correction device 10. That is, the control calculation procedure for driving and controlling the first and second correction motors 42 and 44 is performed. In this calculation procedure, the same processing procedure as steps S7 to S9 described above is executed.

Specifically, an analog detection signal from the angle sensor 18a (18b) as a camera shake detection signal is read from the analog / digital conversion input terminal AD ₁ (AD ₂ ) and the read analog signal is digitally converted. To obtain the digital detection value V _1a (V _1b ) (step S1)
2). Then, as described above, in order to be able to correct the image blur due to the slow camera shake of the camera as well, the digital variable value V _1a (V _1b ) indicating the above-mentioned direct current component is used to correct the image blur. _The angular velocity value V _2a (V _2b ) is first calculated by subtracting _3a (V _3b ), and a digital variable value V _3a (V _3b ) indicating a DC component with respect to this angular velocity value V _2a (V _2b ). _Is divided by the second coefficient K _2a (K _2b ) to add a new digital variable value V _3a (V
_3b ) is recalculated and specified (steps S13 and S1).
4). Here, the digital variable value V _3a (V _3b ) used in step S13 described above is a value calculated using the same second coefficient K _2a (K _2b ) as in step S8 described above. Become.

In this manner, when the angular velocity values V _2a (V _2b ) in the horizontal axis direction and the vertical axis direction are respectively calculated, the image blur is corrected by integrating the angular velocity value V _2a in the horizontal axis direction. A digital swing displacement value V _4a for defining the swing position of the first swing member 30 along the horizontal axis a, which is necessary for this purpose, is calculated, and the angular velocity value V in the vertical axis direction is calculated.
By integrating _2b , a digital swing displacement value V _4b that defines the swing position along the vertical axis b of the second swing member 32, which is necessary to correct the image blur, is calculated. (Step S15).

Now, when performing these integrations,
The size of the integral value is directly calculated by integrating the angular velocity values V _2a (V _2b), and converts the size of an image blur on the imaging plane, the angular velocity values V _2a (V _2b) Is set in a state in which the directions of occurrence of (i.e., the direction of occurrence of image blur) are reversed. As a result, the digital swing displacement value V _4a (V _4b ) calculated in step S15 functions as a correction value for image blur on the image plane.

Then, the analog detection signal from the first current position detection sensor 50a as the current position detection signal of the first swing member 30 in the horizontal axis direction is read from the analog / digital conversion input terminal AD ₃ , and this is detected. The read analog signal is digitally converted to obtain the digital current position detection value V _5a in the horizontal axis direction, and at the same time, the second swing member 3
An analog detection signal from the second current position detection sensor 50b as a current position detection signal in the direction of the vertical axis 2 is read from the analog / digital conversion input terminal AD _4, and the read analog signal is digitally converted to the vertical direction. The digital current position detection value V _5b in the axial direction is obtained (step S16).

After that, which is a feature of this embodiment, the digital swing displacement value V _{4a of} the first swing member 30 in the horizontal axis direction calculated in step S15 is the image blur correction. It is determined whether or not the correctable range MAX _a in the horizontal axis direction mechanically defined by the device 10 is exceeded (step S17). Here, the digital oscillating displacement value V _4a of the horizontal axis direction does not exceed the correction range MAX _a (i.e., correctable range is within MAX _a) when a is determined (NO in step S17), the Next, the digital swing displacement value V _{4b of} the second swing member 32 in the vertical axis direction is
It is determined whether the image blur correction apparatus 10 exceeds the mechanically prescribed correctable range MAX _b in the horizontal axis direction (step S18).

Here, the digital swing displacement value V _4b in the vertical axis direction does not exceed the correctable range MAX _b (that is,
If it is determined that it is within the correctable range MAX _b (NO in step S18), that is, the digital swing displacement value V _4a (V _4b ) is correctable in both the horizontal axis direction and the vertical axis direction. When it is determined that the image shake alarm lamp 24 is turned off, the output level of the output port PO is set to the “H” level (step S19), and thereafter, the first swing member is set. In order to calculate the digital swing drive value V _6a in the horizontal axis direction from the current position of 30, that is, the drive amount of the first correction motor 42, the digital swing displacement value V _4a in the horizontal axis direction is used to calculate the digital present value. The calculation for subtracting the position detection value V _5a is executed, and the digital swing drive value V _6b in the vertical axis direction from the current position of the second swing member 32, that is, the drive amount of the second correction motor 44 is set. To calculate
The calculation for subtracting the digital current position detection value V _5b from the digital swing displacement value V _{4b in the} vertical axis direction is executed (step S
20).

Then, the calculated digital swing drive value V _6a in the horizontal axis direction is digital-to-analog converted and converted into an analog signal by the first digital-analog conversion output terminal D.
Along with outputting from A ₁ , the calculated digital swing drive value V _6b in the vertical axis direction is subjected to digital / analog conversion and output as an analog signal from the second digital / analog conversion output terminal DA ₂ (step S21).

As a result, the analog swing drive signal (V _6a ) output from the first digital / analog conversion output terminal DA ₁ is amplified by the first motor drive amplifier 64a and then the first correction It is output to the motor 42. As a result, the first correction motor 42 swings the first swing member 30 based on the input analog swing drive signal,
Therefore, the correction lens 12 is driven and moved along the horizontal axis a so as to cancel the horizontal axis component of the image blur caused by the camera shake. On the other hand, the analog swing drive signal (V _6b ) output from the second digital / analog conversion output terminal DA ₂ is the second motor drive amplifier 6
After being amplified by 4b, it is output to the second correction motor 44. As a result, the second correction motor 44 swings and drives the second swinging member 32 based on the input analog swinging drive signal, so that the correction lens 12 moves along the vertical axis b due to camera shake. The movement is driven so as to cancel the vertical axis component of the generated image blur.

Then, after the analog swing drive signals (V _6a , V _6b ) are output from the digital / analog conversion output terminal DA ₁ in step S21, the above-mentioned step S6 is performed.
It is determined whether or not the exposure time calculated in step 3 has elapsed (step S22). Here, when it is determined that the exposure time has not yet elapsed (NO in step S22), the process returns to step S12 described above, and the subsequent control procedure is executed to correct the detected image blur. The drive control of the first and second correction motors 42 and 44 is executed. On the other hand, if it is determined that the exposure time has elapsed (step S2
If YES in step 2), the diaphragm (not shown) of the taking lens is driven to open, the movable reflecting mirror (not shown) is driven back to the reflecting position, and the shutter mechanism (not shown) is closed (step S23). In this way, a series of shooting operations is completed.

[0061] On the other hand, a large image blur caused by hand shake, in step S17 described above, the digital oscillating displacement value V _4a of the horizontal axis direction exceeds the correctable range MAX _a (i.e., not within the correction range MAX _a ) (YES in step S17), in order to notify the photographer of the fact that at least the image blur occurring in the horizontal axis direction could not be corrected by the image blur correction device 10, As shown in FIG. 8, the output level of the output port PO is changed to the "L" level (step S24). As a result, the image blur alarm lamp 24 is driven to light.

In this way, the photographer uses the finder 22
When the subject is photographed by fully pressing the release button in the state where the image blur correction lamp 10 is excluded, by observing that the image blur alarm lamp 24 lights up, the generated image blur is not corrected by the image blur correction device 10. That is, in other words, it is informed that camera shake exceeding the image blur correction range has occurred,
It will be possible to recognize that the image blur has occurred in the photographed subject image. Then, by taking a picture of the subject again so as not to cause camera shake, it is possible to surely obtain a good picture without image blur.

As described above, after the output level of the output port PO is changed to the "L" level to turn on the image blur alarm lamp 24 in step S24, the image blur along the horizontal axis a in the image blur compensating device 10 is performed. In order to suspend the correction operation, the digital swing displacement value V _4a is forcibly set as the digital current position detection value V _5a (step S2
5) and proceeds to step S20 described above. Therefore, in this step S20, the digital swing drive value V _6a is 0.
Therefore, the driving of the first correction motor 42 is stopped, and the optical axis of the correction lens 12 is held (standby) at the maximum position in the correctable range along the horizontal axis a. .

On the other hand, in step S18 described above,
If it is determined that the digital swing displacement value V _{4b in the} vertical axis direction exceeds the correctable range MAX _b (that is, not in the correctable range) (YES in step S18), it occurs at least in the vertical axis direction. As shown in FIG. 8, the output level of the output port PO is changed to the "L" level in order to notify the photographer that the image blurring cannot be corrected by the image blurring correction device 10 (step S1). S26). As a result, the image blur alarm lamp 24 is driven to light.

In this way, the photographer uses the finder 22
When the subject is photographed by fully pressing the release button in the state where the image blur correction lamp 10 is excluded, by observing that the image blur alarm lamp 24 lights up, the generated image blur is not corrected by the image blur correction device 10. That is, in other words, it is informed that camera shake exceeding the image blur correction range has occurred,
It will be possible to recognize that the image blur has occurred in the photographed subject image. Then, by taking a picture of the subject again so as not to cause camera shake, it is possible to surely obtain a good picture without image blur.

As described above, after the output level of the output port PO is changed to the "L" level to turn on the image blur alarm lamp 24 in step S26, the image blur along the vertical axis b in the image blur compensating device 10 is performed. In order to interrupt the correction operation, the digital swing displacement value V _4b is forcibly set as the digital current position detection value V _5b (step S2
7) and proceeds to step S20 described above. Therefore, in this step S20, the digital swing drive value V _6b is 0.
Then, the driving of the second correction motor 44 is stopped, and the optical axis of the correction lens 12 is held (standby) at the maximum position in the correctable range along the vertical axis b.

As is clear from the above description, when the image blur generated in the horizontal axis direction and the image blur generated in the vertical axis direction both exceed the correctable ranges MAX _a and MAX _b , the steps are performed. Since YES is determined in both S17 and S18, the image blur alarm lamp 24 is driven to be turned on and the first and second corrections are performed in the same manner as when the correction allowable range is exceeded in the horizontal axis direction or the vertical axis direction. The driving of the motors 42 and 44 is stopped.

As described above, from the state where the magnitude of the image blur exceeds the correctable range in at least one of the horizontal axis direction and the vertical axis direction, the camera shake is suppressed, the occurrence of the image blur is suppressed, and the image blur is suppressed. When the magnitude returns to the correctable range, the calculation for subtracting the digital current position detection value V _5a (V _5b ) from the restored digital swing displacement value V _4a (V _4b ) in the horizontal axis direction or the vertical axis direction is restarted. Then, the drive amount of the corresponding correction motor 42 (44) is calculated.
In this way, the image blur correction operation is restarted. When the magnitude of the image blur to be corrected returns to within the correctable range in both the horizontal axis direction and the vertical axis direction, the image blur alarm lamp 24 is turned off (step S20), and the horizontal axis direction and the vertical axis direction. The photographer is informed that the image blur can be corrected in any of the directions.

It goes without saying that the present invention is not limited to the configuration of the above-described embodiment and can be variously modified without departing from the scope of the present invention. In the following description, the same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

For example, in the above-described embodiment, the image blur alarm lamp 24 is turned on when an image blur exceeding the correctable range occurs in any one of the horizontal axis direction and the vertical axis direction. As described above, the present invention is not limited to such a configuration, and as shown in FIG. 9 as a first modified example, the horizontal axis and the vertical axis exceed the correctable range as the notification means. It is also possible to provide two image blur alarm lamps 24a and 24b which are respectively turned on when the image blur occurs.

Further, in the above-described embodiment, when the image blur exceeding the correctable range occurs, the image blur alarm lamp 24 is turned on, and when it returns to the correctable range, it is turned off. Although described, the present invention is not limited to such a configuration. For example, as shown as a second modification in FIG. 10, control for changing the output level of the output port to “H” in step S19. Step S
The image blur alarm lamp 24 may be continuously turned on until the release is completed by executing the process after waiting for the exposure time in Step 22 to exceed the correctable range even once.

Further, in the above-described embodiment, the image blur alarm lamp 24 for notifying that the image blur exceeds the correctable range is driven to be turned on after the release switch 60 is turned on. However, the present invention is not limited to such a configuration, and is, for example, shown in FIG.
As shown as a modified example of Step S of the above-described embodiment,
By executing the control procedure of 17 to S19 and steps S24 to S27 also between step S9 and step S10, the image blurring occurs even after the photometric switch 56 is turned on until the release switch 60 is turned on. The alarm lamp 24 may be configured to be driven to light. With this configuration, a camera shake warning can be issued before the shutter is released, and the photographer can attach the camera to a tripod based on the camera shake warning, for example, before shooting. It is possible to prevent the image blurring caused by.

In the above-described embodiment, the image blur alarm lamp 24 provided in the finder 22 is used as the notification means, but the present invention is not limited to such a configuration. The image blur alarm lamp 24 may be attached to the outer surface of the camera body (not shown) of the camera, or may be attached to the outer peripheral surface of the taking lens. Further, the present invention is not limited to the use of a lamp as the notification means.
As shown in FIG. 2 as a fourth modified example, the alarm buzzer 68 or the like may be configured to output an alarm sound, or both (that is, the lamp 24 and the buzzer 68) may be provided.

Further, in the above-described embodiment, the image blur correction device 10 is arranged so as to be arranged between the photographing lens and the film surface, that is, the correction lens 12 is arranged between the two. As described above, the present invention is not limited to such a configuration, and the correction lens 12 may be disposed, for example, at any position in the lens group constituting the photographing lens. Alternatively, it may be arranged in front of the taking lens. That is, the image blur correction device 10 may be arranged with respect to the photographing lens anywhere in the photographing optical system.

[0075]

As described in detail above, since the image blur correction device for a camera according to the present invention is constructed, after the degree of image blur exceeds the correctable range, the image blurring amount falls within the correctable range again. In this case, the image blur correction can be restarted immediately.

Further, according to the image blur correction device for a camera according to the present invention, the photographer is informed that the camera shake that exceeds the image blur compensable range has occurred. As a result,
By taking a picture again based on this notification, the photographer
You will definitely be able to get a picture with no image blur.

[Brief description of drawings]

FIG. 1 is a front view showing the configuration of an embodiment of an image blur correction device for a camera according to the present invention.

FIG. 2 is an exploded perspective view showing the configuration of the image blur correction device shown in FIG. 1 in an exploded state.

FIG. 3 is a block diagram schematically showing a configuration of a control circuit.

FIG. 4 is a front view showing a disposition state of an image blur alarm lamp in a viewfinder of a camera to which the image blur correction apparatus is applied.

FIG. 5 is a flowchart showing a first half of a control procedure for image blur correction in the CPU of the control circuit.

FIG. 6 is a flowchart showing an intermediate part of a control procedure for image blur correction in the CPU of the control circuit.

FIG. 7 is a flowchart showing the latter half of the control procedure for image blur correction in the CPU of the control circuit.

FIG. 8 is a diagram showing the relationship between the degree of image blur and the lighting state of an image blur alarm lamp.

FIG. 9 is a front view showing a configuration of a modified example of the image blur alarm lamp provided in the image blur correction device according to the present invention.

FIG. 10 is a flowchart showing a modified example of the light-off timing of the image blur alarm lamp in the control circuit provided in the image blur correction apparatus according to the present invention.

FIG. 11 is a flowchart showing a modified example of the lighting timing of the image blur alarm lamp in the control circuit provided in the image blur correction apparatus according to the present invention.

FIG. 12 is a front view showing a configuration relating to a modified example of the notification means provided in the image blur correction device according to the present invention.

[Explanation of symbols]

O Shooting aperture A ₁ First swing axis A ₂ Second swing axis 10 Image blur correction device 12 Correction lens 14 Support mechanism 16 Drive mechanism 18a; 18b Angular velocity sensor 20 Control circuit 22 Finder 24 Image blur alarm lamp 26 Correction Lens holding cylinder 26a Cylinder body 26b Outer flange portion 28 Fixed support member 28a Regulation opening 28b First swing center hole 30 First swing member 30a Opening 30b Second swing center hole 32 Second swing Member 32a Opening 34 First swing shaft 36 First driven arm 36a First female screw hole 38 Second swing shaft 40 Second driven arm 40a Second female screw hole 42 First correction motor 44th 2 correction motor 46 1st drive screw shaft 48 2nd drive screw shaft 50a; 50b Current position detection sensor 52a; 52b Permanent magnet 54 CPU 6 the photometric switch 58 first pull-up resistor 60 release switch 62 a second pull-up resistor 64a; 64b motor driving amplifier 66 pull-up resistor 68 warning buzzer

Claims (23)

[Claims] 1. A correction optical system for canceling an image blur on an image forming surface due to a camera shake, and a subject image formed by the photographing optical system regardless of a blur of a photographing optical axis with respect to the subject. A driving unit that drives the correction optical system so as not to shake with respect to a surface, a detection unit that detects that an image blurring that exceeds the correction range of the correction optical system has occurred, and a correction range that can be corrected by the detection unit. An image blur correction apparatus for a camera, comprising: a control unit that interrupts the driving of the correction optical system by the drive unit when it is detected that an image blur exceeding the above condition has occurred. 2. The camera according to claim 1, wherein the control means continues driving interruption of the correction optical system for a period in which an image blur exceeding the correctable range is occurring. Image blur correction device. 3. The image blur of a camera according to claim 2, wherein the control means releases the drive interruption of the correction optical system when the generated image blur returns to within the correctable range. Correction device. 4. The control means sets the correction optical system to the maximum of the correctable range when it is detected by the detecting means that an image blur exceeding the correctable range by the correction optical system has occurred. The image blur correction device for a camera according to claim 1, wherein the image blur correction device is stopped. 5. A correction optical system for canceling an image blur on an image forming surface due to a camera shake, and a subject image formed by the photographing optical system regardless of a blur of a photographing optical axis with respect to the subject. A driving unit that drives the correction optical system so as not to shake with respect to a surface, a detection unit that detects that an image blurring that exceeds a correctable range of the correction optical system has occurred, and the detection unit performs the correction When it is detected that an image blur exceeds the range that can be corrected by the optical system,
An image blur correction device for a camera, comprising: an informing unit for informing that an image blur exceeding the correctable range has occurred. 6. The informing means continues to inform that the image blur exceeding the correctable range is occurring over a period in which the image blur exceeding the correctable range is occurring. The image blur correction device for a camera according to claim 5. 7. The image blur correction device for a camera according to claim 5, wherein the notifying means is a lamp arranged in a viewfinder of the camera. 8. A correction optical system for canceling image blurring on an image plane due to camera shake, and a subject image formed by the photographing optical system regardless of the blurring of the photographing optical axis with respect to the subject. A driving unit that drives the correction optical system so as not to shake with respect to a surface, a detection unit that detects that an image blurring that exceeds a correctable range of the correction optical system has occurred, and the detection unit performs the correction When it is detected that an image blur exceeds the range that can be corrected by the optical system,
It is characterized by further comprising: control means for controlling the drive means so as to interrupt the drive of the correction optical system; and notification means for notifying that an image blur exceeding the correctable range has occurred. Image stabilizer for camera. 9. The camera according to claim 8, wherein the control means continues driving interruption of the correction optical system for a period in which an image blur exceeding the correctable range is generated. Image blur correction device. 10. The image blur of a camera according to claim 9, wherein the control means releases the suspension of driving of the correction optical system when the generated image blur returns to within a correctable range. Correction device. 11. The informing means continues to inform that the image blur exceeding the correctable range is occurring over a period in which the image blur exceeding the correctable range is occurring. The image blur correction device for a camera according to claim 8. 12. The image blur correction device for a camera according to claim 8, wherein the notifying means is a lamp arranged in a viewfinder of the camera. 13. The detecting means determines whether or not the generated image blur is within a correctable range in two directions orthogonal to each other in a plane parallel to the image plane. Item 9. An image blur correction device for a camera according to Item 8. 14. The control means suspends the driving of the correction optical system by the driving means in one direction when it is determined that the image blur generated in one direction exceeds the correctable range. 14. The image blur correction device for a camera according to claim 13, wherein the drive means is controlled so that 15. The notifying means starts the notifying operation when it is determined that the image blur occurring in at least one direction exceeds the correctable range. Image stabilizer for camera. 16. The informing means, when the detecting means detects that an image blur exceeding a correctable range by the correcting optical system has occurred after the photographing operation of the camera is started, 9. The image blur correction device for a camera according to claim 8, which notifies that an image blur exceeding the correctable range has occurred. 17. The control means sets the correction optical system to the maximum of the correctable range when it is detected by the detecting means that an image blur exceeding the correctable range by the correction optical system has occurred. 9. Stopping is carried out.
An image blur correction device for a camera according to. 18. A camera shake detection means for detecting camera shake, a correction optical system provided in addition to a photographing optical system, a driving means for driving the correction optical system, and the driving means for the camera shake detection means. The image of the camera, which is controlled based on the detection result of (1) to control the subject image formed by the photographing optical system in a direction parallel to the image plane by the correction optical system to cancel the image blur. A blur correction device, based on the detection result of the detection means, a limit detection means for detecting the occurrence of image blur exceeding the correctable range by the correction optical system, and the correction possible range by this limit detection means. An image blur correction device for a camera, comprising: an interruption unit that interrupts driving of the correction optical system by the drive unit when it is detected that an excessive image blur has occurred. 19. A camera shake detecting means for detecting camera shake, a correction optical system provided in addition to a photographing optical system, a driving means for driving the correction optical system, and the driving means for the camera shake detecting means. The image of the camera, which is controlled based on the detection result of (1) to control the subject image formed by the photographing optical system to move in the direction parallel to the image plane by the correction optical system to cancel the image blur. A blur correction device, based on the detection result of the detection means, a limit detection means for detecting the occurrence of image blur exceeding the correctable range by the correction optical system, and the correction possible range by this limit detection means. Image blur correction for a camera, characterized in that, when it is detected that an excessive image blur has occurred, an informing unit is provided to inform that an image blur exceeding the correctable range has occurred. Location. 20. A camera shake detection means for detecting camera shake, a correction optical system provided in addition to a photographing optical system, a drive means for driving the correction optical system, and the drive means for the camera shake detection means. The image of the camera, which is controlled based on the detection result of (1) to control the subject image formed by the photographing optical system in a direction parallel to the image plane by the correction optical system to cancel the image blur. A blur correction device, based on the detection result of the detection means, a limit detection means for detecting the occurrence of image blur exceeding the correctable range by the correction optical system, and the correction possible range by this limit detection means. When it is detected that an excessive image blur has occurred, an interruption unit that interrupts the driving of the correction optical system by the driving unit, and an image that exceeds the correctable range by the limit detection unit When the record is detected to have occurred, the correction range of the camera image blur correction apparatus, characterized in that the image blur is provided with informing means for informing of the occurrence beyond. 21. The correcting optical system according to claim 18, further comprising a correcting lens provided so as to be movable in a direction parallel to the image plane. Image stabilizer for camera. 22. The camera according to claim 21, wherein the driving means drives and moves the correction lens along two directions orthogonal to each other in a plane parallel to the image formation plane. Image stabilization device. 23. The correction optical system is added to an arbitrary position with respect to the photographing optical system.
21. The image blur correction device for a camera according to any one of 8 to 20.