JPH0522649A - Method and device for prevention of camera hand shake - Google Patents

Abstract

PURPOSE:To improve the operability of the title method and device by evading such a case where an operator has the symptom similar to the seasickness due to the continuous observation given to a subject through a viewfinder. CONSTITUTION:The hand shake value caused in a release state is converted into a displacing velocity set on the surface of a CCD 9 based on the output information on the acceleration sensors S1 and S2 and the information on the focal distance value and the focusing value of a photographing optical system L. Then the CCD 9 is displaced by the actuators 10 and 11 based on the displacing velocity. Thus the camera hand shake is eliminated. The luminous flux sent from a subject field is divided into two parts by an optical path dividing means 31 through the system L. One of both divided fluxes forms an image on the CCD 9 and the other flux forms an image on a finder CCD 32, respectively. The image formed on the CCD 52 is displayed on a finder video element 33 in an electronic viewfinder 30'. Furthermore a photographing range frame is also displayed on the element 33 for the images recorded with prevention of the camera hand shake.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera shake preventive apparatus and a camera shake preventive method suitable for use in a steel type video camera or a movie type video camera in which an image pickup device is arranged at an image forming position of a photographing optical system. It is a thing.

[0002]

2. Description of the Related Art As high-magnification photography of cameras progresses,
A camera shake phenomenon that occurs during shutter release operation becomes a problem.

In the past, this hand shake phenomenon was prevented by using a tripod at the time of photographing, but this method has drawbacks such as inconvenience and poor operability when carrying a tripod, and thus, hand shake prevention has recently become possible. Various anti-vibration devices have been developed.

For example, in Japanese Patent Laid-Open No. 63-125923, the optical axis of a photographing optical system (hereinafter, also simply referred to as "optical axis").
If two acceleration sensors whose sensitivity axes are aligned along the direction are arranged along the direction perpendicular to the optical axis to detect the amount of image blur during shutter release operation, and this detected amount is larger than the allowable limit Discloses a technique in which the output to the shutter drive circuit and the aperture drive circuit is stopped and a warning is displayed to prevent camera shake.

Further, Japanese Patent Application Laid-Open No. 1-130144 discloses a technique capable of detecting an accurate vibration by varying the duty ratio of the pulse signal when integrating the vibration signal during camera shake. ing.

Further, in Japanese Patent Laid-Open No. 1-130125, the posture of the camera is always detected when the amount of camera shake is detected by using the acceleration sensor, and the acceleration sensor is not supplied with power unless the camera is in a shooting state. Then, the technique of aiming at labor saving of power consumption is disclosed.

On the other hand, a CCD (Charge Couple)
Japanese Patent Application Laid-Open No. 1-309031 discloses a technique in which a camera using an image sensor such as an ed device) is configured to store a zooming position where a desired shooting range can be obtained in advance and to set the zooming position at any time. Etc. have already been disclosed.

[0008]

However, all of the techniques disclosed in the above-mentioned three publications relating to the vibration isolation device are designed to remove the high frequency component of the vibration wave and respond only to the low frequency component. However, the problem that the operability is deteriorated occurs due to the above configuration.

Therefore, in the case of a video camera which must be operated while watching the viewfinder for a long time in such a situation, the movement of the fingers of the user who is actually operating and the viewfinder field of view will be affected. The user may feel the same symptoms as seasickness because the correspondence with the displayed captured image may be shifted.

Further, in Japanese Patent Application Laid-Open No. 63-125923, as described above, when the image shake amount is large, only a warning is displayed, and the image shake correction is not performed. When the focal length of the system is small, the image blur is unlikely to occur, which makes it difficult to detect the image blur.

The present invention has been made in view of these various circumstances, and a first object thereof is to utilize the output of the acceleration sensor to determine the image displacement speed and the image displacement direction on the image sensor. In view of this, by providing an image stabilization device for a camera that can improve the operability during camera shake prevention by displacing the image sensor itself in the same direction as the image displacement direction at a speed that is proportional to this image displacement speed during exposure. To do.

A second object of the present invention is to provide a camera shake preventing method for achieving the first object.

A third object of the present invention is to provide a camera-shake preventing device that satisfies the first object, and can display an image-pickup range instruction frame that is stored under the control of the camera-shake prevention in the viewfinder field of view. An object is to provide a camera shake prevention device.

[0014]

According to a first aspect of the present invention, in order to achieve the first object, an image pickup element disposed at an image forming position of a photographing optical system and a photographing operation at the time of shutter release operation. Detects one or a plurality of acceleration sensors arranged so as to detect the displacement amount of the camera occurring in the direction orthogonal to the optical axis of the optical system, and the focal length value of the photographing optical system at that time. Based on the output of the acceleration sensor, the focal length detecting means and the focus detecting means, the imaging based on the focal length detecting means, the focus detecting means for detecting the focusing amount of the photographing optical system at that time. Comprehensive calculation means for calculating the acceleration at the time of shutter release operation of the camera on the element and the displacement speed of the camera displaced in the direction orthogonal to the optical axis of the photographing optical system, and the calculation result of the comprehensive calculation means at the time of exposure Based camera And an image pickup device driving means having an actuator capable of displacing the image pickup device in a direction orthogonal to the optical axis of the image pickup optical system by an amount corresponding to the amount of displacement. is there.

The invention described in claim 2 is the same as claim 1.
In the camera shake prevention device described in (1), the two acceleration sensors are arranged at different positions on the optical axis of the photographing optical system.

The invention described in claim 3 is the same as claim 1
In the camera shake prevention device of (1), a weighting means for weighting the displacement of the image pickup element based on information obtained by detecting the position of the actuator is additionally provided.

On the other hand, the invention according to claim 4 is the above-mentioned second aspect.
In order to achieve the above object, in a camera having an image pickup device at an image forming position of a photographing optical system, the displacement amount of the camera generated at the time of shutter release operation is detected by using one or a plurality of acceleration sensors. Of the camera and the focal length value and the focusing amount of the photographing optical system at that time, the acceleration of the camera on the image pickup device and the displacement speed of the camera displaced in the direction perpendicular to the optical axis of the photographing optical system. Is obtained, and at the time of exposure, the image pickup device is displaced in the direction perpendicular to the optical axis of the photographing optical system by the displacement amount of the camera.

The invention described in claim 5 is the same as claim 1.
In the camera shake preventing device according to any one of 3 to 3, an optical path splitting means is provided in the optical system, and an image pickup device for an electronic viewfinder is provided at an image forming position on the optical path split by the optical path splitting means. It is characterized by being formed.

The invention according to claim 6 is the same as claim 5
In the camera shake prevention device of the camera, the image pickup device for the electronic viewfinder is configured to be capable of displaying a shooting range instruction frame indicating a range recorded under the shake prevention control in the display field of view. It is what

[0020]

The camera-shake preventing apparatus having the above-described structure utilizes the output information from one or a plurality of acceleration sensors and the focal length value and focusing amount information of the photographing optical system. The amount of camera shake that occurs during the release operation is detected as the amount of displacement in the direction orthogonal to the shooting optical axis on the imaging surface, and is provided in the imaging element or imaging optical system that is located at the imaging position of the imaging optical system. By displacing the correction optical system based on this amount of displacement, the camera shake phenomenon during shutter release operation is prevented.

Further, the light flux from the object field which has passed through the image pickup optical system is divided into two by the optical path splitting means, and one light flux is imaged on the image pickup element for recording and the image pickup range in which the image is recorded. The pointing frame is displayed in the field of view of the electronic viewfinder, the other light flux is focused on the finder image pickup device, and the image is displayed in the field of view of the electronic viewfinder.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera shake prevention device and a camera shake prevention device capable of preventing a camera shake phenomenon caused by a rotational movement in a vertical plane including a photographing optical axis and a vertical parallel movement during a shutter release operation. The method will be described in detail according to the illustrated embodiment.

FIG. 1 is a schematic configuration diagram showing a configuration of a first embodiment of a camera shake preventing apparatus using a photoelectric conversion element as an image pickup element.

In FIG. 1, reference numeral 1 is a camera shake preventing device of the camera, and 2 is a camera body.

Reference numeral L denotes a zoom type photographing optical system provided in the camera body 2. For example, the focus lens group L1 arranged on the object side along the optical axis O and the zoom arranged on the rear optical path thereof. It is composed of a lens unit L2.

In this case, the focus lens unit L1 moves in the front-back direction on the optical axis O only when the desired focal length is realized, so as to correspond to the subject distance (shooting distance) at that time. It is configured so that focusing can be performed.

The zoom lens group L2 is constructed so that the focal length can be changed by moving the zoom lens group L2 along the optical axis O in the front-rear direction together with the focus lens group L2. That is, this photographing optical system is configured to perform front type focusing.

Reference numeral 3 is a focus driving means for driving the focus lens group L1 in the focusing direction, and 4 is a focus position detecting means for detecting the moving position of the focus lens group L1.

Reference numeral 5 is a zoom driving means for driving the zoom lens group L2 in the front-back direction, and 6 is a zoom position detecting means for detecting the moving position of the zoom lens group L2.

Reference numerals S1 and S2 denote a first acceleration sensor and a second acceleration sensor, which are arranged at a front position and a rear position of the camera body 2 parallel to the optical axis O, respectively. It is provided so that the accelerations at the front and rear of the body 2 can be detected.

In this case, the two acceleration sensors S1 and S2
The output from is a output from which the direct current component and the high frequency component other than 1 Hz to 20 Hz are removed in the process of passing through the filters 7 and 8 attached respectively, and the parallel displacement calculating means 12 and the rotational displacement calculating means 13 which will be described later. Will be transmitted to.

Reference numeral 9 denotes an image pickup element arranged at an image forming position of the photographing optical system L at the infinite photographing distance, and is composed of a photoelectric conversion element such as a CCD.

As shown in FIG. 2, the image pickup device 9 has an upper edge formed with an upper protrusion 9a for receiving the magnetic force from the upper actuator 10, and a lower edge formed by the lower actuator 11. A downward projecting portion 9b that receives a magnetic force is formed, and a hook portion 9c for stopping displacement is formed at the lower end of the downward projecting portion 9b.

The hook portion 9c is configured to stop the vertical displacement of the image pickup device 9 by engaging with an appropriate fixing portion (not shown) in the camera body 2.

Reference numerals 10 and 11 denote upper and lower actuators provided at outer positions in the vertical direction of the image pickup element 9, both of which surround the upper projecting portion 9a and the lower projecting portion 9b of the image pickup element 9. It is configured as a coil in a state, and is configured such that the image sensor 9 can be continuously displaced in a direction orthogonal to the optical axis O (vertical direction in the drawing) by controlling the amount of current flowing through the coil. There is.

Reference numeral 12 is the above-mentioned focus position detecting means 4,
Zoom position detection means 6 and two acceleration sensors S1,
For example, parallel displacement calculation means connected to S2, respectively, position detection means 4, 6 and acceleration sensors S1, S
Based on the output from 2, the acceleration during parallel movement of the camera body 2 due to the shutter release operation can be calculated.

Reference numeral 13 denotes the above-mentioned focus position detecting means 4,
Zoom position detection means 6 and two acceleration sensors S1,
For example, in the rotational displacement calculating means connected to S2,
Based on the outputs from the position detecting means 4 and 6 and the acceleration sensors S1 and S2, the acceleration during the rotational movement of the camera body 2 caused by the shutter release operation can be calculated.

Reference numeral 14 denotes addition means connected to these two calculation means 12 and 13, and adds the calculation outputs from these addition means to parallel acceleration and rotational displacement of the camera body 2 on the image pickup element 9 at that time. It is configured to obtain the acceleration.

In this case, the rotational displacement acceleration a _RT and the parallel displacement acceleration a _SF are respectively calculated by the following arithmetic expressions.

A _RT = (x + f) × (−a ₁ + a ₂ ) / D a _SF = − (x / f) × a ₁ = (x / f) × a ₂ where x: focus detection information (extending amount) ) F: Zoom detection information (focal length of the photographing optical system L) a ₁ : Information of the acceleration sensor S1 a ₂ : Information of the acceleration sensor S2 D: Installation distance between the two acceleration sensors S1 and S2 Note that the parallel displacement acceleration a _SF is a _RT = 0, that is,
The calculation is performed only when a ₁ = a ₂ .

Reference numeral 15 is an integrating means connected to the adding means 14, and obtains the displacement speed (also the image shake moving speed) of the camera body 2 on the image pickup element 9 by integrating the output from the adding means 14. Is configured to get.

The parallel displacement calculating means 12 described above,
The rotational displacement calculation means 13, the addition means 14 and the integration means 15 constitute a total calculation means.

Reference numeral 16 designates the actuators 10 and 11 described above.
Actuator characteristic imparting means for converting the control characteristic of the above into an electric signal.

Reference numeral 17 is a gain information means for the actuators 10 and 11 having gain characteristics as shown in FIG. 3, and the gain information based on the position of the image pickup element 9 at that time is obtained by the position information from the actuator position detecting means 19 which will be described later. Selected,
This is fed back to the synthesizing means 18.

The gain information means 17 can also be constructed so that its gain can be changed.

Reference numeral 18 is a synthesizing means connected to the above-mentioned integrating means 15, actuator characteristic giving means 16 and gain information means 17, and the above-mentioned upper and lower actuators 10 are based on the outputs from these means 15-17. , 11
It is configured to control the amount of coil current flowing through.

Reference numeral 19 denotes actuator position detecting means for detecting the displacement positions of the actuators 10 and 11 described above.

Reference numeral 20 is the actuator position detecting means 1
When the hook portion 9c of the image sensor 9 is engaged with the above-mentioned fixed portion in the camera body 2 by the follow-up correction impossible warning means connected to 9, and further displacement becomes physically impossible,
Based on the position information from the actuator position detecting means 19, the user can be warned of the immovable state.

The gain information means 17 and the follow-up correction impossible warning means 20 may be arranged such that both 17, 20 are installed together in one camera, or only one of them is installed. It is configured as a means having a relationship of "good".

Reference numeral 30 denotes a zoom type viewfinder installed on the upper portion of the camera body 2.

Next, the operation or action of the camera shake preventive apparatus thus constructed will be described with reference to FIG.

When the user takes a picture while supporting the camera with his / her hand, the camera body 2 makes a rotational movement in a vertical plane including the optical axis O by the pressing force of the fingers during the shutter release operation.
Alternatively, a vertical motion may be performed in parallel.

When such movement occurs, camera shake prevention control is started (S1), and the accelerations due to the rotational and parallel movements at the front and rear of the camera body 2 at that time are detected by the first acceleration sensor S1 and the second acceleration sensor S1. The acceleration information is detected by the acceleration sensor S2 (S2, S3), and the respective acceleration information is sent to the parallel displacement calculation means 12 and the rotational displacement calculation means 13 via the filters 7 and 8 attached to the acceleration sensors S1 and S2. Are output respectively (S4, S
5, S6, S7).

On the other hand, information on the focusing amount and the focal length value of the zoom type photographing optical system L at the time of photographing is as follows: the amount of displacement of the focus lens unit L1 on the optical axis and the zoom lens unit L.
The amount of displacement on the optical axis 2 is detected by the focus position detecting means 4 and the zoom position detecting means 6, respectively, and the parallel displacement calculating means 12 and the rotational displacement calculating means 13 are detected.
Will be output to (S8, S9).

Therefore, the displacement calculating means 12 and 13 calculate the respective accelerations of the camera body 2 during the parallel movement and the rotational movement based on these output values, and the calculation results are given to the adding means 14. Output.

Therefore, the adding means 14 adds the respective accelerations of the camera body 2 during the parallel movement and the rotational movement, and the rotational displacement acceleration a _RT and the parallel displacement acceleration a _RT of the camera body 2 on the image pickup device 9 are added. _{The SF} is calculated and the calculated value is output to the integrating means 15 (S10).

This output is integrated by the integrating means 15 (S11) and input to the synthesizing means 18 as a displacement velocity value of the camera body 2 on the image pickup device 9.

By the way, since the driving characteristics of the actuators 10 and 11 for displacing the image pickup device 9 are input from the actuator characteristic applying means 16 to the synthesizing means 18 in advance (S13), the synthesizing means 18 uses this. Based on the information, the amount by which the image sensor 9 is displaced upward or downward in a follow-up manner is calculated by an amount corresponding to the displacement speed value of the camera body 2 on the image sensor 9 (S12).

In this case, in the embodiment in which the gain information means 17 is installed, the displacement position of the image pickup device 9 during the operation of the actuator (S16) is the actuator position detection means 1.
9 (S17), this position information is fed back to the combining means 18 via the gain information means 17 (S14).

Therefore, the feedback characteristic of the gain information means 17 at this time is set such that the gain at the time of the follow-up displacement is large when the image pickup device 9 is in the central portion of the photographing optical system L in advance, and the image pickup device 9 is arranged above and below the gain. If you set it so that its gain becomes small when it approaches the displacement limit,
It is possible to prevent the image sensor 9 from colliding with the fixed portion in the camera body 1 near the upper and lower displacement limits.

On the other hand, in the embodiment in which only the follow-up correction impossible warning means 20 is installed, the hook portion 9c of the image pickup device 9 is provided.
Is engaged with a fixed part in the camera body 2 and further displacement becomes impossible, the follow-up correction impossible warning means 20
Based on the position information from the actuator position detecting means 19, the user is warned that the displacement is impossible (S15).

By the way, FIG. 5 shows the second embodiment of the present invention.
FIG. 1 is a schematic configuration diagram of an embodiment showing an embodiment in which the photographing range after the end of the shake prevention can be displayed in the visual field of the electronic viewfinder.

In FIG. 5, the configuration of the photographing optical system L and the configurations of 1 to 21 are the same as in the case of FIG. However, in this embodiment, the outputs from the above-mentioned synthesizing means 18 and actuator position detecting means 19 are transmitted to a camera shake control range display processor 34, which will be described later.

Reference numeral 30 'denotes an electronic viewfinder constructed in a so-called single-lens reflex type, which has a reflection optical axis O ₂ formed perpendicularly to the optical axis O and the reflection optical axis O ₂ at right angles to the user direction. It is configured as a viewfinder having an observation optical axis O ₃ which is reflected by.

Reference numeral 31 denotes an optical path splitting means for splitting a photographing light flux from the object field and guiding one of the light fluxes to the above-mentioned reflected optical axis O ₂ , which is between the zoom lens group L2 and the image pickup device 9. It is configured as, for example, a half mirror, which is arranged on the photographing optical axis O at an inclination angle of 45 degrees with respect to the photographing optical axis O.

Reference numeral 32 denotes an image pickup device for an electronic viewfinder (hereinafter, referred to as an image pickup device disposed at an image forming position on the reflection optical axis O ₂ ).
It is called a "finder image pickup device").

Reference numeral 33 denotes a finder imaging element made of, for example, a liquid crystal, which is provided on the observation optical axis O ₃ and visualizes the image formed on the finder imaging element 32 as it is. Is configured.

Reference numeral 34 is a photographing range (camera shake control range) instruction frame display processor for displaying the recorded photographing range in which the camera shake prevention control is performed and in the electronic viewfinder 30 '.

This photographing range instruction frame display processor 34
Is a range after the hand-shake preventing control on the image pickup device 9 is performed based on the outputs from the synthesizing unit 18 and the actuator position detecting unit 19 (hereinafter, referred to as “shooting range instruction frame”). 35 is set, and this is recorded on an appropriate magnetic storage medium represented by a magnetic tape or the like.
It is constructed so that it can be projected on the viewfinder imaging element 33 as shown in FIG. 6 at all times or when necessary.

In this case, the shooting range instruction frame 35 is a shooting range formed after the image stabilization control as described in the first embodiment is applied to the image formed on the image pickup device 9. .

Next, the operation or action according to the second embodiment will be described.

The light flux from the object field which has passed through the image pickup optical system L is divided into two by the optical path splitting means 31, and one of the light fluxes passes through the optical path splitting means 31 as it is and the image pickup device 9
An image is formed on the upper side, and the other light flux is reflected upward by the optical path splitting means 31 to form an image on the finder image pickup element 32.

Then, in principle, the image formed on the finder image pickup device 32 is displayed as it is on the finder image pickup device 33. Display processor 3
4 is always input, as shown in FIG.
Will also be displayed simultaneously on the viewfinder visualization element 33.

Therefore, when observing the object scene, the position of the photographing range instruction frame in the electronic viewfinder 30 'changes as the camera shake prevention control changes at that time.

Further, when the output from the photographing range instruction frame display processor 34 is inputted as needed, as shown in FIG. 6, the image is displayed on the viewfinder imaging element 33 whenever necessary. The shooting range instruction frame 35 is displayed.

In addition, in the first and second embodiments, the example in which the camera shake correction of the image pickup device 9 corresponding to the displacement speed of the camera body 2 is performed has been described. In this case, the connection is made as shown by the dotted line 21 in FIG. In this case, the camera shake correction corresponding to the acceleration can be performed. Therefore, when the camera shake correction corresponding to the acceleration is desired, the above configuration is adopted.

Furthermore, the principle of hand shake prevention according to the present invention can be applied to a camera equipped with a conventional anti-shake photography optical system as shown in FIG.

Therefore, the configuration and operation in this case will be briefly described.

In FIG. 7, reference numeral 50 designates a vibration-proof photographing optical system and 5
Reference numeral 1 is an afocal optical system, 52 is a correction optical system, and F is a film surface.

The image stabilization optical system 50 is constructed so as to prevent camera shake by displacing the correction optical system 52 in a direction in which image blur does not occur based on the output of an acceleration sensor (not shown). .

Therefore, by utilizing the above-mentioned upper and lower actuators 10 and 11, this correction optical system 52 is used.
If the camera can be displaced in the vertical direction by an amount corresponding to the amount of camera shake at that time, camera shake can be prevented.

As described above, in the camera shake preventing apparatus 1 according to the present invention, the output information from one or a plurality of acceleration sensors S1 and S2, the focal length value of the photographing optical system L, and the focusing amount information. By using the and, the amount of camera shake of the camera generated during the shutter release operation is detected as the amount of displacement in the direction orthogonal to the imaging optical axis O on the imaging surface, and the imaging provided at the imaging position of the imaging optical system L is detected. Since the element 9 or the correction optical system 52 provided in the anti-vibration photographing optical system 50 is configured to be displaced based on this displacement amount so as to prevent the hand-shake phenomenon during the shutter release operation, a tracking delay during operation, etc. Therefore, the operability at the time of photographing can be improved as compared with the conventional camera shake preventing device or method of this kind.

Further, when a plurality of acceleration sensors are provided at positions distant from each other along the optical axis O, there is also an effect that the accuracy in the camera shake prevention control can be improved.

When the gain of the gain information means 17 can be changed and the gain is fed back to the synthesizing means 18, the collision of the image pickup device 9 with the fixed part in the camera can be prevented. It also has the effect of enabling prevention.

Further, when the present invention is carried out in the mode as in the second embodiment, even if the user continues to look at the finder for a long time, the user does not have to suffer from the symptoms of seasickness. .

Further, in the case where the photographing range instruction frame 35 can be displayed in the electronic viewfinder, there is an effect that it is possible to always know the range (photographic range) to be recorded even during photographing. Become.

Although a plurality of embodiments have been described above, the present invention is not limited to this, and various modifications can be made without departing from the scope of the invention.

For example, in the illustrated embodiment, a photoelectric conversion element such as a CCD is used as the image pickup element, but a film using a photosensitizer may be used instead of this.

In the illustrated embodiment, the camera shake prevention control is performed regardless of the length of the focal length at that time, but the parameters of the gain information of the actuators 10 and 11 are set according to the position of the zoom lens group L2. It is also possible to configure so that the camera shake prevention control is performed only when the focal length is at or near the TELE region.

In the illustrated embodiment, the camera shake prevention control is always performed. However, an operation member capable of selecting whether or not to perform the camera shake prevention control is provided in advance.
It is also possible to implement the camera shake prevention control based on the user's intention.

Further, in the illustrated embodiment, the prevention control is performed on the assumption that the camera shake motion generated during the shutter release operation is the rotational motion in the vertical plane including the photographing optical axis O and the parallel motion in the vertical direction. It should be noted that in the present invention, prevention control can be performed also for rotational movement in other planes and parallel movement in an oblique direction.

[0092]

As described above, according to the invention described in claims 1 to 3, the output of the acceleration sensor is used to obtain the image displacement speed and the image displacement direction on the image sensor. , During the exposure, by displacing the image sensor itself in the same direction as the image displacement direction at a speed that is proportional to this image displacement speed, good followability is achieved and camera shake prevention that can improve operability during camera shake prevention A device can be provided.

According to the method as described in claim 4, it is possible to take a photograph with almost no image blur despite the occurrence of camera shake due to release.

Further, according to the inventions described in claims 5 and 6, the photographing range instruction frame which is controlled to prevent camera shake and is recorded can be displayed in the viewfinder field, and moreover, the finder can be looked into for a long time. It is also possible to provide a camera shake prevention device that can avoid the occurrence of seasickness.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a configuration of a first embodiment of a camera shake prevention device of the present invention, and is a configuration diagram when a photoelectric conversion element is used as an image pickup element.

FIG. 2 is a partial configuration diagram showing a detailed configuration of an image pickup element and upper and lower actuator portions.

FIG. 3 is a gain characteristic diagram of gain information means.

4 is a flowchart showing an operation sequence in the camera shake preventing device of the camera shown in FIG. 1. FIG.

FIG. 5 is a schematic configuration diagram showing a configuration of a second embodiment of the camera shake preventing device of the present invention.

FIG. 6 is a configuration diagram showing an embodiment capable of displaying a shooting range instruction frame which is recorded with anti-shake control in an electronic viewfinder field.

FIG. 7 is an optical path diagram showing a conventional image stabilization optical system.

[Explanation of symbols]

L zoom type photographing optical system L1 focus lens group L2 zoom lens group O optical axis 1 camera shake preventive device 2 camera body 3 focus driving means 4 focus position detecting means 5 zoom driving means 6 zoom position detecting means S1 first acceleration sensor S2 second Acceleration sensor 7, 8 Filter 9 Image sensor 9a Upper protruding portion 9b Lower protruding portion 9c Hook portion 10, 11 Upper / lower actuator 12 Parallel displacement calculation means 13 Rotational displacement calculation means 14 Addition means 15 Integrating means 16 Actuator characteristic imparting means 17 gain information unit 18 combining unit 19 actuator position detector 20 follow uncorrectable warning means 30 viewfinder 30 'electronic viewfinder _{O 2} reflection optical axis _{O 3} observation optical axis 31 the optical path splitting means 32 finder image sensor 33 finder imaging device 34 imaging Range indication frame display Processor 35 shooting range indicating frame

Claims (6)

[Claims] 1. An image pickup device arranged at an image forming position of a photographing optical system, and one or a plurality of acceleration sensors arranged so as to detect a displacement amount of a camera at the time of shutter release operation. A focal length detecting means for detecting a focal length value of the photographing optical system at that time, a focus detecting means for detecting a focusing amount of the photographing optical system at that time, an output of the acceleration sensor and the focal length detecting means. Based on the output of the focus detection means, the acceleration at the time of shutter release operation of the camera on the image pickup device and the displacement speed of the camera displaced in the direction orthogonal to the optical axis of the photographing optical system are calculated. An image pickup device having an arithmetic unit and an actuator capable of displacing the image pickup element in a direction orthogonal to the optical axis of the photographing optical system by an amount corresponding to the displacement amount of the camera based on the calculation result of the comprehensive arithmetic unit during exposure. A camera shake prevention device, characterized in that it is configured to include a child drive means. 2. The camera shake prevention device according to claim 1, wherein the two acceleration sensors are arranged at different positions on the optical axis of the photographing optical system. 3. The weight adding means for weighting the displacement of the image pickup device based on the information obtained by detecting the position of the actuator is attached. Camera shake prevention device. 4. A camera having an image pickup device at an image forming position of an image pickup optical system, wherein a displacement amount of the camera generated during shutter release operation is detected by using one or a plurality of acceleration sensors, and the output of the acceleration sensor is detected. Based on the focal length value and the focusing amount of the photographing optical system at that time, the acceleration of the camera on the image sensor and the displacement speed of the camera displaced in the direction perpendicular to the optical axis of the photographing optical system are calculated. Seeking,
A method for preventing camera shake of a camera, characterized in that at the time of exposure, the image pickup device is displaced by a displacement amount of the camera in a direction perpendicular to an optical axis of the photographing optical system. 5. An optical view dividing means is provided in the optical system, and an image pickup device for an electronic viewfinder is provided at an image forming position on the optical path divided by the optical path dividing means. The camera shake preventing device according to claim 1, wherein 6. The image pickup device for an electronic viewfinder is configured so as to be able to display a shooting range instruction frame indicating a range recorded under anti-shake control in the display field of view. The camera shake prevention device according to Item 5.