JP2002214660A - Correcting optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To actualize an improvement of the driving performance of a correcting optical system using a rolling member without causing any image blur on an observation surface every time the image blur is corrected. SOLUTION: This device has correcting optical systems 1 and 2 which can move to correct the image blur, a driving means which drives the correcting optical systems, a rolling means equipped with a rolling member 10 which rolls according to the movement of correcting optical systems and holds the correcting optical systems movably only in the direction orthogonal to the optical axes and a rolling holding member 12 for holding the rolling member so that it can roll, and an initial position setting means 13 which moves only the rolling member to a specific initial position via the rolling holding member without moving the correcting optical systems after the image blur is corrected by the correcting optical systems.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement of a correction optical device mounted on a camera or the like.

[0002]

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

Recently, a system for correcting an image blur caused by a camera shake applied to a camera has been studied, and a factor which causes a photographer to fail in photographing has almost disappeared.

Here, a system for correcting image blur caused by camera shake will be briefly described.

[0005] The camera shake at the time of photographing is usually a vibration of 1 Hz to 12 Hz as a frequency. However, even if such camera shake occurs at the time of release of the shutter, it is possible to take a picture without image shake. As a basic idea, it is necessary to detect the vibration of the camera due to the camera shake and to displace the correction optical system according to the detected value. Therefore, in order to be able to take a picture in which image shake does not occur even if camera shake occurs, first, it is necessary to accurately detect the camera vibration, and second, to correct the optical axis change due to the camera vibration. It is necessary to correct by displacing the system.

To detect the vibration (camera shake), in principle, a shake sensor for detecting acceleration, speed, and the like, and an output signal of the shake sensor is electrically or mechanically integrated to output a displacement. This can be achieved by mounting a vibration detecting means having an arithmetic unit on a camera. And
By displacing the correction optical system based on this detection information and controlling the correction optical device mounted to change the photographing optical axis, image blur correction can be performed.

[0007] As a conventional example of the driving means of the correction optical system,
Using a coil and permanent magnet, place the permanent magnet on the fixed part,
A structure has been proposed in which a coil is arranged in a correction optical system and driven by applying a current to the coil.

FIG. 7 is a diagram of a system that generally corrects image shake due to camera shake, and is a diagram of a system that corrects image shake caused by camera vertical shake 81p and horizontal shake 81y in the direction of arrow 81 in the figure.

In the figure, reference numeral 82 denotes a lens barrel, 83p, 83
y is a vibration detecting means for detecting camera vertical vibration (pitch direction) vibration and camera lateral vibration (yaw direction) vibration, respectively, and the respective vibration detection directions are indicated by 84p and 84y.
Reference numeral 85 denotes a correction optical device (86p and 86y are coils for applying thrust to the correction optical device 85, and 86p and 86y are position detecting elements for detecting the position of the correction optical device 85). Driving is performed with the outputs of 83p and 83y as target values, and stability on the image plane 88 is ensured.

In such a correction optical device, the correction optical system holds the drive optical system freely in both the pitch and yaw directions in the direction perpendicular to the optical axis, while tilting with respect to the optical axis in order to prevent deterioration of optical performance. Must be prevented. For this purpose, there is a type in which the correction optical system is pressed against a predetermined end surface by an urging spring, and the correction optical system slides along the predetermined end surface, thereby restricting the inclination in the optical axis direction. However, in the above configuration, since the frictional resistance due to the sliding with the predetermined end face hinders the driving of the correction optical system, a rolling member is provided between the correction optical system and the predetermined end face for the purpose of reducing the frictional resistance. To reduce the load by changing the frictional resistance due to sliding from sliding friction to rolling friction, thereby improving the driving of the correction optical system (Japanese Patent Laid-Open No. 11-64916).
No.) has been made.

In the proposal for reducing friction by using the rolling member, in order to prevent the rolling member from being displaced by vibration or the like, a regulating portion for regulating the position of the rolling member (where the rolling member is a predetermined member). , It is possible to roll in the driving range of the correction optical system). In the above-described configuration, when the rolling member is displaced, in order to prevent the rolling member from abutting on the regulating portion during image blur correction and causing sliding friction, the correction optical system needs to be fully controlled before starting the image blur correction. Driving (the rolling member rolls in the regulating portion, but after the correction optical system is driven even after contacting the regulating portion, the rolling member slides at the position while contacting the regulating portion, and thereafter, The rolling member is at the end of the rolling range, that is, the rolling range of the rolling member is updated, and if the rolling member is driven in the entire range, the rolling range becomes possible.) It was necessary to perform initial position setting (hereinafter, also referred to as "initialize").

[0012]

However, in the above-mentioned prior art, in order to make it difficult to know when and when the rolling member is displaced, the initialization is performed every time before the start of image blur correction. In case,
Every time the image shake correction is started, the movement of the initialization of the rolling member becomes a large shake of the image on the viewfinder and is seen by the photographer (because the correction optical system also moves).

(Object of the Invention) It is an object of the present invention to improve the driving performance of a correction optical system using a rolling member without causing image shaking on an observation surface for each image shake correction. It is an object of the present invention to provide a correction optical device that can perform the following.

[0014]

In order to achieve the above object, the present invention provides a correction optical system movable to correct image blur, a driving means for driving the correction optical system, and the correction optical system. A rolling member that rolls with the movement of the system and movably holds the correction optical system only in a direction orthogonal to the optical axis, and a rolling holding member that movably holds the rolling member. A correction optical device having a rolling means for performing the image blur correction by the correction optical system, after the correction optical system is completed, the correction optical system is not moved, and only the rolling member is moved through the rolling holding member to a predetermined initial position. The correction optical device has an initial position setting means for moving the correction optical device.

[0015]

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

1 to 4 are views showing a correction optical device according to an embodiment of the present invention. More specifically, FIG. 1 is an exploded perspective view showing components of a main part of the correction optical device. FIG.
FIG. 3 is a cross-sectional view for explaining the drive of image blur correction, FIG. 3 is a cross-sectional view for assisting the description of the operation of the main part, and FIG. 4 is a correction optical system section for explaining the locking and unlocking operation of the correction optical system. It is the front view seen from the direction of the stopping means.

First, the configuration of the correction optical device will be briefly described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a correction lens for correcting image blur, and reference numeral 2 denotes a lens holding frame for holding the correction lens 1, which is a main component of a correction optical system. Reference numeral 3 denotes a unit support frame for supporting the entire apparatus. 4
Is an L-shaped support shaft for restricting rotation of the lens holding frame 2 around the optical axis, and a 4a portion extending in the yaw direction slidably engaging with a bearing portion 2a formed on the lens holding frame 2,
It has a 4b portion extending in the pitch direction that slidably engages with a bearing portion 3a formed on the unit support frame 3. 5a,
Reference numeral 5b denotes an IRED (infrared light emitting diode) attached to the lens holding frame 2, which emits light to PSDs 16a and 16b, which will be described later, through a hole 2b provided in the lens holding frame 2. Reference numeral 6 denotes a coil for driving the correction optical system, which includes a coil 6a for driving in the pitch direction and a coil 6b for driving in the yaw direction, and is integrally attached to the lens holding frame 2.

Reference numeral 7 denotes a first yoke, which is integrally attached to the unit support frame 3. 8a, 8b, 8c, 8d
Is a permanent magnet, the permanent magnets 8a and 8b are in the first yoke 7, the permanent magnets 8c and 8d are in the second yoke 9 described later,
Each is attached integrally. Reference numeral 9 denotes a second yoke which faces the permanent magnet 8 with the lens holding frame 2 interposed therebetween, and is integrally attached to the unit support frame 3 with the lens holding frame 2 interposed therebetween. Reference numeral 10 denotes a rolling ball which is sandwiched between the lens holding frame 2 and the yoke 7 and rolled, and is disposed at three equally spaced positions. Reference numeral 11 denotes one end of the spring holding portion 3b of the unit support frame 3 and the other end of the spring holding portion 2b of the lens holding frame 2.
The backlash removing springs are attached to each of the reference numerals c and remove backlash in the optical axis direction, and are disposed at three equally spaced positions. 12
Is a rolling ball holding plate which holds the rolling ball 10 so as to be able to roll, and which itself can be driven in a plane perpendicular to the optical axis. The rolling ball 10, the play removing spring 11, and the rolling ball holding plate 12 constitute a unit for preventing the correction optical system from tilting in a direction orthogonal to the optical axis.

Reference numeral 13 denotes an engagement shaft, which includes a gear portion 13a meshing with a lock ring described later, a male screw portion 13b screwed with a female screw portion 3c formed on the unit support frame 3, and the above-mentioned rolling ball holding plate 12 And a mating portion 13c that engages with an engaging groove 12a having a tapered portion formed at the bottom. 1
Reference numeral 4 denotes a flexible substrate to which the terminals of the above-mentioned IREDs 5a and 5b and the terminal of the coil are soldered, and is electrically connected to a hard substrate 15 described later. Reference numeral 15 denotes a hard board fixed to the unit support frame. The hard board 15 has the PSDs 16a and 16b mounted thereon and is connected to the above-described flexible board 14 to control the electrical control of image blur correction. 1
Reference numeral 7 denotes a plate for preventing a short circuit between the second yoke 9 and the hard substrate 15.

Reference numeral 18 denotes a lock ring which rotatably engages with the above-mentioned unit support frame 3.
, And a suction plate 21 is attached via a lock coil 19 and a stop pin 20. 22 is a lock yoke, 23a, 23b, 23c, 2
Reference numeral 3d denotes a lock permanent magnet, and the lock yoke 22 and the lock permanent magnet 23 form a closed magnetic circuit with the lock coil 19 interposed therebetween. Reference numeral 24 denotes a suction coil, which includes a suction yoke 24a and a suction bobbin 24b. Reference numeral 25 denotes a return spring that has one end connected to the lock ring 18 and the other end connected to the unit support frame 3, and constantly biases the lock ring in the locking direction by its spring property. Reference numeral 26 denotes a stopper pin which is integrally attached to the unit support frame 3 and controls rotation of the lock ring 18.

Next, the operation of the main part will be described with reference to FIGS.

First, the operation during the image blur correction will be described. The image blur correction is performed by energizing the coil 6 arranged in a closed magnetic circuit (the arrow indicates the flow of magnetic flux) configured as shown in FIG. This is performed by driving the lens holding frame 2. 2A shows a state in which the correction lens 1 is located at the movable center, and FIG. 2B shows a state in which the correction lens 1 is shifted from the movable center by correction driving of the coil 6.

FIG. 3A shows a state where the locking of the correction optical system is released and the image blur can be corrected. When the lens holding frame 2 is driven according to the above-described driving principle, the lens holding frame 2 is moved. Is driven by the relative movement of the lens holding frame 2 and the yoke 7, and the rolling ball holding plate 12 for holding the rolling ball 10 in a rotatable manner.
Is driven by the amount of movement. At this time, the load caused by moving the rolling ball 10 during driving is a resistance due to the rolling friction between the rolling ball 10 and the lens holding frame 2 and the yoke 7.
The thrust for driving the rolling ball holding plate 12 by the rolling ball 10 and the resistance due to sliding friction between the rolling ball 10 and the rolling ball holding plate 12 in proportion to the thrust. Generally, the resistance due to rolling friction is small, and the rolling ball holding plate 12 is sandwiched between the lens holding frame 2 and the yoke 7 with a predetermined gap, so that the resistance generated when the rolling ball holding plate 12 is driven is small. Therefore, the load for driving the rolling ball 10 is small.

Next, the locking of the rolling ball holding plate 12 and the initialization of the rolling ball 10 by the engagement shaft 13 which constitutes a rolling member initial means described later in conjunction with the locking by the lock ring 18 of the correction optical system. Will be described.

FIG. 4A shows the unlocked state of the correction optical system, and FIG. 4B shows the locked state. FIG.
The drive from the locked state shown in FIG. 4B to the unlocked state shown in FIG. 4A is performed by energizing the lock coil 19 disposed in a closed magnetic path formed by the locking yoke 22 and the locking permanent magnet 21. Thereby, the lock ring 18 is rotated counterclockwise. With the rotation of the lock ring 18, the rotation is also transmitted to the engagement shaft 13 which is gear-coupled with the lock ring 18, and the engagement shaft 13 is engaged with the unit support frame 3 by the engagement groove of the rolling ball holding plate 12. The driving restriction of the rolling ball holding plate 12 is released by retracting from the rolling ball holding plate 12 (the state of FIG. 2A). The release state of the lock ring 18 is maintained by energizing the suction coil 24 and sucking the suction plate 21 integrated with the lock ring 18. On the other hand, in the drive from the unlocked state in FIG. 4A to the locked state in FIG.
The rotation is transmitted to the engagement shaft 13 by the return force, and the engagement shaft 13 is engaged with the engagement groove 12 a of the rolling ball holding plate 12 from the screwing relationship with the unit support frame 3. Joint 1
3c abuts and locks the rolling ball holding plate 12 (the state of FIG. 2B).

When the center of the engaging groove 12a and the center of the engaging shaft 13 are deviated, the engaging portion 13c abuts on the tapered portion of the engaging groove 12a and is parallel to the optical axis of the engaging shaft 13. A force such that the center of the engaging groove 12a and the center of the engaging shaft 13 overlap with each other is applied to the rolling ball holding plate 12, and the rolling ball holding plate 12 is driven to a predetermined position. Initialization is performed. Then, the lock ring 18 comes into contact with the stopper pin 26 to restrict its rotation, and the locked state is maintained. As a result of the initialization, even if the rolling ball is shifted during the correction, the rolling ball may return to a predetermined position before the correction is started.

FIG. 5 shows an image blur correction device including a correction optical device having the above-described configuration (consisting of a correction optical device, a vibration detection device, and the like).
1 is a block diagram illustrating an electrical configuration of a lens-interchangeable autofocus (AF) single-lens reflex camera system equipped with a camera.

In the figure, reference numeral 200 denotes a camera body, and 300 denotes an interchangeable lens. First, the camera body 2
On the 00 side, reference numeral 201 denotes a camera CPU constituted by a microcomputer.
In addition to controlling the operation of various circuits in the lens C, the lens C is connected via the camera contact 202 when the interchangeable lens 300 is mounted.
The communication with the PU 301 is performed. Reference numeral 203 denotes a power switch that can be operated from the outside.
Is a switch for starting the power supply to enable power supply to each actuator and sensor in the system and operation of the system.

Reference numeral 204 denotes an externally operable two-stage stroke release switch, the signal of which is transmitted to the camera CP.
It is input to U201. Then, the camera CPU 201 follows the signal input from the release switch and if the first stroke switch (SW1) is ON, the photometry circuit 20
5 to determine an exposure amount, perform a focusing operation, and the like. The operation of various devices in the lens 300 is controlled, and the camera body 200 is controlled.
When attached to the camera C via the lens contact 302
(To communicate with the PU 201), and an exposure start command is transmitted to the exposure circuit 206 to perform the actual exposure operation. A transport start command is transmitted to cause the film to be wound. A distance measuring circuit 208 generates a SW1 signal of the release switch 204 (SW).
In response to a distance measurement start command transmitted from the camera CPU 201 by turning on 1), the distance of the subject existing in the distance measurement area is measured, and the amount of movement of the focusing lens necessary for focusing on the object is determined. And transmits it to the camera CPU 201.

Next, on the interchangeable lens 300 side, 30
Reference numeral 2 denotes a lens contact, to which a signal is transmitted from the camera body 200 side. Reference numeral 303 denotes an externally operable IS switch, which is capable of selecting whether or not to perform an image blur correction operation (IS operation) described later (ON operation selection of IS operation). Reference numeral 304 denotes a vibration detection device, which is a lens CPU 3
Vertical shake of camera (pitch direction) according to command from 01
And a vibration detecting unit 304a for detecting acceleration or speed of the lateral vibration (yaw direction), and a lens CPU 3 which electrically or mechanically integrates an output signal of the vibration detecting unit to obtain a displacement.
And an arithmetic unit 304b that outputs the data to the C.01.

Reference numeral 305 denotes a correction optical device described in detail with reference to FIGS. It is roughly divided into the following five components controlled by the lens CPU 301, respectively. The first is a correction optical system 305a mainly composed of the correction lens 1 and the lens holding frame 2, and the second is permanent magnets 8a to 8d for driving the correction optical system 305a in the pitch direction and the yaw direction, and the coils 6a and 6b. Driving means 305b, third is mainly composed of IREDs 5a, 5b and PSDs 16a, 16b. Position detecting means 305c for detecting the position of the correction optical system 305a, and fourth is holding the correction optical system 305a in a locked state. The correction optical system means 305d (the lock ring 18 and the lock coil 19 correspond to this), and the fifth is the engagement with the above-described correction optical system locking means 305d, and the engagement on the rolling ball holding plate 12. A rolling member comprising an engaging shaft for moving back and forth with respect to the groove and for initializing the rolling ball to a predetermined position via the rolling ball holding plate; It is a Sharaizu means 305e.

Reference numeral 306 denotes a focusing device. The driving circuit 3 is controlled by the lens CPU 301 in accordance with the amount of movement of the focusing lens transmitted from the camera CPU 201 as described above.
06a and a focusing lens 306b driven by the driving circuit 306a. Reference numeral 307 denotes an aperture device, which includes a drive circuit 307a controlled by the lens CPU 301 according to the aperture operation command transmitted from the camera CPU 201 as described above, and an aperture member 307b driven by the drive circuit 307a to determine an aperture area. Have been.

FIG. 6 is a flowchart showing a series of operations of the camera system.

First, the power switch 2 of the camera body 200
03 is turned on, the camera CPU 201 executes step #
In 1, the power supply to the interchangeable lens 300 is started (or when a new battery is inserted, the camera body 200
Camera body 2 when the interchangeable lens 300 is attached to
00 and the interchangeable lens 300 start communication). In the next step # 2, the camera CPU 201 determines whether or not the SW1 signal of the release switch 204 is generated, and if it is, proceeds to step # 3, where the lens CPU 301 turns on the IS switch 303 ( I
(S operation selection). If the IS operation has been selected, the process proceeds to step # 4. If the IS operation has not been selected, the process proceeds to step # 17.

At step # 4, the lens CPU
301 starts an internal timer. Next step #
In 5, the camera CPU 201 drives the photometry circuit 205 and the distance measurement circuit 208 to perform photometry and AF (distance measurement) operations. Further, the lens CPU 301 drives the focusing device 306 and the vibration detection device 304 to start AF (focusing operation) and shake detection. Further, in order to enable shake correction control by the correction optical system 305a, the correction optical system locking means 305d
Is released (the state shown in FIG. 4A), and the engaging shaft 13 is retracted from the engaging groove 12a in conjunction with the releasing operation. The initialization is released by the rolling member initialization locking means 305e (the state of FIG. 3A). In the following step # 6, the lens CPU 301 checks whether or not the content of the time measured by the timer has reached a predetermined time t1, and if not, stays in this step until it reaches. This is a process for waiting for a time until the output of the vibration detecting device 304 is stabilized. Then, for a predetermined time t
When 1 has elapsed, the process proceeds to step # 7, where the lens CPU 30
Reference numeral 1 denotes a correction optical system 305 based on a target value signal output from the vibration detection device 304 and an output from the position detection means 305c.
is driven to start the shake correction control.

In the next step # 8, the camera CP
U201 checks whether or not the SW2 signal of the release switch 204 is generated (SW2 is ON), and if not, proceeds to step # 10, and determines whether or not the SW1 signal is generated. If the SW1 signal has not been generated, the process proceeds to step # 11.
When the PU 301 stops the correction control, the correction optical system 3
05a is locked at a predetermined position by the correction optical system locking means 305d (the state shown in FIG. 4B), and the engaging shaft 13 is moved onto the rolling ball holding plate 12 in conjunction with the locking operation. The rolling ball 10 is initialized to a predetermined position and held at that position by engaging with the engaging groove 12a (FIG. 3B).
State).

If the SW2 signal is not generated in step # 8, but the SW1 signal is generated in step # 10, the process returns to step # 8. Then, assuming that the SW2 signal is generated, the process proceeds to step # 9, in which the lens CPU 301 controls the aperture device 307 and the camera CPU 201 performs an exposure operation on the film. Thereafter, the process proceeds to step # 10, where the camera CPU 20
1 checks the state of the SW1 signal. If the SW1 signal is no longer generated, the process proceeds to step # 11. As described above, the lens CPU 301 stops the shake correction control and moves the correction optical system 305a to the predetermined position. System locking means 30
The correction optical system 305a is locked by 5d, and the rolling ball 10 is initialized and held at that position.

When the above operation is completed, the process proceeds from step # 11 to step # 12, where the lens CPU 301 once resets the timer and restarts it. And
In the next steps # 13 and # 14, it is determined again whether the SW1 signal is generated within the predetermined time t2, and if the image blur correction is stopped, the SW1 signal is again generated within the predetermined time t2.
If one signal is generated, the process proceeds to step # 15, where the camera CPU 201 and the lens CPU 301
(Ranging operation and focusing operation) and unlocking of the correction optical system 305a, and the engagement shaft 1
3 is retracted from the engagement groove 12a (initialization is released by the rolling member initializing means 305e). Thereafter, the process proceeds to step # 7, and since the shake detection is continued, the correction optical system 305a is driven immediately based on the target value signal and the output of the position detection means 305c, and the shake correction control is started again. Hereinafter, the same operation as described above is repeated. By performing such processing, as described above, when the photographer stops the release operation and then performs the release operation again, the inconvenience of activating the vibration detection device 304 and waiting for the output to stabilize each time is avoided. It can be eliminated.

On the other hand, if the SW1 signal is not generated within t2 after stopping the shake correction in steps # 13 and # 14, the process proceeds to step # 16, where the lens C
The PU 301 stops the shake detection (stops the operation of the vibration detection device 304). Thereafter, the process returns to step # 2, and the camera CPU 201 enters a state of waiting for the generation of the SW1 signal.

If the IS operation has not been selected in step # 3, the process proceeds to step # 17, where the camera CPU 201 performs photometry and AF (ranging operation), and the lens CPU 301 performs AF (focusing operation). , Respectively. Then, in the next step # 18, the camera CP
U201 checks whether or not the SW2 signal of the release switch 204 is generated.
The process proceeds to step 20 to determine whether or not the SW1 signal has been generated. If the SW1 signal has not been generated, the process returns to step # 2 to enter a state of waiting for the generation of the SW1 signal.
If the SW2 signal has not been generated in step # 18, but the SW1 signal has been generated in step # 20, the process returns to step # 18. If it is determined that the SW2 signal of the release switch 204 has been generated, the process proceeds to step # 19, and the lens CPU 301
07, and the camera CPU 201 performs an exposure operation on the film. Then, in the next switch # 20, the camera CPU 201 checks the state of the SW1 signal as described above, and returns to step # 18 or step # 2 according to the result.

In the above camera system, the power switch 2
03 is repeatedly turned off until O is turned off.
When FF is performed, the camera CPU 201 and the lens CPU 301
Then, the power supply to the interchangeable lens 300 ends.

According to the above-described embodiment, in conjunction with the movement of the correction optical system 305a when the correction optical system locking means 305d is locked by the correction optical system locking means 305d, the correction optical system 505a is not moved and the rolling member initializing means 305e is used. With a certain engaging shaft 13, only the rolling ball 10 as a rolling member is set at a predetermined position via the rolling ball holding plate 12 (a position where the engaging shaft 13a is engaged with the engaging groove 12a). So
The rolling ball 10 can be initialized without shaking the image on the finder. In other words, it is possible to improve the driving performance of the correction optical system 304a using the rolling ball 10 without causing image sway on the finder for each image shake correction.

The rolling ball 10 and the rolling ball holding plate 12 also serve as a means for preventing the correction optical system 305a from tilting in a direction perpendicular to the optical axis, so that the number of parts can be almost increased. There is no.

(Modification) In the above embodiment, an example in which the present invention is applied to a single-lens reflex camera system is described. However, the present invention can be applied to other cameras and optical devices having a function of observing an image. .

[0046]

As described above, according to the present invention,
An object of the present invention is to provide a correction optical device that can improve the driving performance of a correction optical system using a rolling member without causing an image shake on an observation surface for each image shake correction.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing main components of a correction optical device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view for describing a correction operation according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view for explaining an operation of a main part in one embodiment of the present invention.

FIG. 4 is a front view for explaining an operation when the correction optical system is driven from the correction state to the locked state in the embodiment of the present invention.

FIG. 5 is a block diagram showing an electrical configuration of the interchangeable lens single-lens reflex camera system according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a series of operations of the camera system of FIG. 5;

FIG. 7 is a diagram showing a system for correcting image shake caused by general camera shake.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Correction lens 2 Lens holding frame 3 Unit support frame 10 Rolling ball 12 Rolling ball holding plate 18 Lock ring 19 Lock coil 20 Stop pin 21 Suction plate 22 Lock yoke 23 Permanent magnet for locking 24 Suction coil 25 Return spring

Claims (4)

[Claims] 1. A correcting optical system movable to correct image blur, a driving unit for driving the correcting optical system, and a rolling unit that moves with the moving of the correcting optical system, and controls the correcting optical system to emit light. A correction optical device, comprising: a rolling member that holds the rolling member movably only in a direction orthogonal to the axis; and a rolling unit that includes a rolling holding member that holds the rolling member movably; After completion of image blur correction by means of the above, the correction optical system has an initial position setting means for moving only the rolling member to a predetermined initial position via the rolling holding member without moving the correction optical system. apparatus. 2. A locking means which shifts to a state in which the correction optical system is locked other than during image blur correction, and shifts to a state in which the locked state is released during image blur correction, The initial position setting means actuates the rolling holding member in conjunction with the transition of the locking means from the unlocked state to the locked state, and moves the rolling member to a predetermined initial position. The correction optical device according to claim 1, wherein: 3. An engagement hole having a tapered portion is formed in the rolling holding member, and in conjunction with the transition of the locking means from the unlocked state to the locked state, An engaging member, which is one of the components of the initial position setting means, is engaged through the tapered portion of the engaging hole, and at the time of the engagement, the rolling holding member is operated to move the rolling member. The correction optical device according to claim 2, wherein the correction optical device is moved to a predetermined initial position. 4. The interlocking member is disengaged from the engaging hole in conjunction with the transition of the locking means from the locked state to the unlocked state, whereby the rolling holding member is 4. The correction optical device according to claim 3, wherein movement from the predetermined initial position to an arbitrary position within a movement range of the correction optical system is permitted.