JPH10319462A - Image blurring correction mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct image blurring caused by camera shake with simple constitution and control. SOLUTION: A correction lens 28 is held by a lens supporting frame 25. Recessed parts 26 and 27 are formed on the upper end face 25A and the right end face 25B of the frame 25, respectively. A 1st direct driving type actuator 131 consisting of a stepping motor 131a and a shaft 131b is disposed in the recessed part 26, and a 2nd direct driving type actuator consisting of a stepping motor 132a and a shaft 132b is disposed in the recessed part 27. The stepping motors 131a and 132a are fixed on the inner wall surface of the external frame of an optical equipment. The tips of the shaft 131b and the shaft 132b abut on a surface 26a and a surface 27a, respectively. A pin 151 is protruded in the vicinity of a corner part where the upper end face 25A and the right end face 25B of the frame 25 are orthogonally crossed each other. The end 152a of a coil spring 152 is fixed on the pin 151 and the end 152b thereof is hooked on the projection part of the inner wall surface of the external frame of the optical equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image blur correction mechanism in an optical instrument.

[0002]

2. Description of the Related Art Conventionally, products equipped with a mechanism for correcting optical image blur caused by camera shake have been put to practical use in optical devices such as still cameras and binoculars. These image blur correction mechanisms, for example, correct image blur by driving a correction lens in a direction perpendicular to the optical axis in a direction that cancels the movement of the optical axis due to camera shake.
As such a correction mechanism, a coil, a permanent magnet, and a yoke are arranged at predetermined positions of a lens frame holding a correction lens, and the lens frame is driven by using an electromagnetic force generated by flowing a current through the coil. The configuration is known.

[0003]

However, in order to correct the image blur, the lens frame must be reciprocated at least in two directions orthogonal to each other. Therefore, a plurality of coils, a plurality of permanent magnets, and a yoke must be combined. However, there has been a problem that the size of the correction mechanism becomes large, the configuration of the correction mechanism becomes complicated, and control becomes difficult.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an image blur correction mechanism which is simple in configuration and control and does not increase in size.

[0005]

An image blur correction mechanism according to the present invention has a lens housing for holding a correction lens for correcting an image blur caused by camera shake, and a movable unit having a lens housing. A direct-acting actuator that directly pushes a part of the lens housing to reciprocate the lens housing along a predetermined direction in a plane orthogonal to the optical axis of the correcting lens. Is characterized in that at least a part thereof is disposed in an open space formed in the lens housing, and the open space is, for example, a cutout formed in a part of the lens housing.

Preferably, as a direct acting actuator,
A first direct-acting actuator having a first movable portion for reciprocating the lens housing along a first direction in a plane; and a first linear actuator having a second movable portion and moving the lens housing in a first direction in the plane. A second direct-acting actuator that reciprocates in a second direction orthogonal to the direction.

[0007] For example, the cutout portion has first and second surfaces perpendicular to the first direction and a first surface continuous with the first and second surfaces and having a third surface perpendicular to these surfaces. Of the recess,
A second recess having fourth and fifth surfaces perpendicular to the second direction and a sixth surface continuous to the fourth and fifth surfaces and perpendicular to these surfaces; The direct-acting actuator is disposed in the first recess, and the second direct-acting actuator is disposed in the second recess. For example, the movable portion of the first direct-acting actuator has first and second movable portions. Abut on the surface, the second
The movable part of the linear motion type actuator contacts the fourth and fifth surfaces.

[0008] Preferably, the lens accommodating portion is so arranged that the movable portion of the first direct-acting actuator always abuts on the first surface and the movable portion of the second direct-acting actuator always abuts on the fourth surface. There is an urging means for urging.

[0009] The cutout portion includes, for example, first and second surfaces perpendicular to the first direction and third and fourth surfaces perpendicular to the second direction and perpendicular to the first and second surfaces. Wherein the first and second direct-acting actuators are disposed in the opening, for example, the movable portion of the first direct-acting actuator abuts the first and second surfaces, The movable portion of the second direct-acting actuator contacts the third and fourth surfaces.

Preferably, the lens accommodating portion is arranged such that the movable portion of the first direct-acting actuator always comes into contact with the first surface and the movable portion of the second direct-acting actuator always comes into contact with the third surface. There is an urging means for urging.

The urging means is, for example, a coil spring.

For example, the correction lens is used for binoculars having a pair of telephoto optical systems, and the correction lens is provided in each of the pair of telephoto optical systems and is integrally held in a lens housing. It is provided between the correction lenses of the optical system.

The first and second linear actuators are arranged, for example, along an axial direction parallel to the optical axis of the correction lens.

Further, the image blur correction mechanism according to the present invention has a lens housing for holding a correction lens for correcting an image blur caused by a camera shake, and a movable part, and the movable part forms a part of the lens housing. A direct-acting actuator that directly reciprocates the lens housing along a predetermined direction in a plane orthogonal to the optical axis of the correcting lens by directly pressing the lens housing, and a part of an outer edge of the lens housing. Is composed of a portion facing the casing of the direct-acting actuator and extending along the driving direction of the movable portion, and a portion connected to an end of the portion extending along the driving direction and abutting on the tip of the movable portion. It is characterized by having.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. Note that, in this specification, “vertical” refers to a vertical direction in a normal use state of an optical apparatus including an image blur correction mechanism according to an embodiment of the present invention, and “horizontal” refers to a direction orthogonal to “vertical”. Point to. FIG. 1 is a perspective view showing an image blur correcting mechanism for a monocular or a camera lens to which the first embodiment according to the present invention is applied, and FIG. 2 is a front view. The correction lens 28 is held by the lens support frame 25. The lens support frame 25 is a flat plate having a plane 25X orthogonal to the optical axis OP of the correction lens 28, and the shape of the contour outside the cross section in a plane parallel to the plane is substantially square. Lens support frame 25
The upper end face 25A in FIG. 1 is perpendicular to the plane 25X and parallel to a plane extending in the lateral direction including the optical axis OP. The right end surface 25B of the lens support frame 25 in FIG. 1 is perpendicular to the plane 25X and the optical axis O
It is parallel to a plane extending in the vertical direction including P. Top surface 25A
And the right end face 25B are adjacent and orthogonal to each other, and are provided with concave portions 26 and 27, respectively. The recess 26 is defined by a surface 26c parallel to the upper end surface 25A, a surface 26a perpendicular to the surface 26c, and a surface 26b perpendicular to the surface 26c and facing the surface 26a. The recess 27 is located on the right end face 2
A surface 27c parallel to 5B and a surface 2 perpendicular to the surface 27c;
7a and a surface 27b perpendicular to the surface 27c and opposed to the surface 27a.

In the optical apparatus to which the present embodiment is applied, the light beam that has passed through the objective lens passes through the correction lens 28, and is transmitted to the eyepiece via an image inversion optical system composed of, for example, a Porro prism or a roof prism. Be guided. That is, the lens support frame 25 is disposed in the optical device so that the correction lens 28 is positioned between the objective lens and the image reversing optical system. In this specification, the “reference position” indicates a position where the optical axis OP of the correction lens 28 coincides with the optical axis of another optical system.

The first direct-acting actuator 131 is provided in the recess 26. The first direct-acting actuator 131 includes a stepping motor 131 a and a shaft 13.
1b. The stepping motor 131a includes a motor case 131c and a rotor (not shown) provided in the motor case, and the rotor can rotate forward and backward around an axis along a lateral direction. The shaft 131b rotates integrally with the rotor in the rotation direction of the rotor,
It is supported movably with respect to the rotor in the axial direction. A lead screw (not shown) is formed on the outer peripheral surface of the shaft 131b.
c) is screwed into a female screw (not shown) formed on the bearing. That is, the shaft 131b advances and retreats along its axial direction while rotating with respect to the forward and reverse rotation of the rotor. A ball (not shown) is embedded at the tip of the shaft 131b, and the ball presses a target. The motor case 131c is fixed to the inner wall surface (not shown) of the outer frame of the optical device, and the tip of the shaft 131b is in contact with the surface 26a. Further, the first direct-acting actuator 131 is substantially housed in a space defined by the concave portion 26, a surface including the plane 25X, and a surface of the lens support frame 25 including the surface on the back side of the plane 25X. .

In the recess 27, a second linear actuator 132 is provided. The second linear actuator 132 is similar to the first linear actuator 131,
It comprises a stepping motor 132a and a shaft 132b. Motor case 13 of stepping motor 132a
The rotor (not shown) arranged in 2c is capable of rotating forward and reverse around an axis along the vertical direction. The motor case 132c is fixed to the inner wall surface (not shown) of the outer frame of the optical device, and a ball (not shown) at the tip of the shaft 132b.
Is in contact with the surface 27a. The second direct-acting type actuator 132 is substantially housed in a space defined by the concave portion 27, a surface including the plane 25X, and a surface of the lens support frame 25 including a surface on the back side of the plane 25X.

In the present embodiment, the first direct-acting actuator 131 is provided in a space defined by the concave portion 26, a surface including the flat surface 25X, and a surface of the lens support frame 25 including the surface on the back side of the flat surface 25X. , But is not limited to this. For example, the thickness of the motor case 131c (the dimension in the direction along the optical axis OP in FIG. 1) may be larger than the thickness of the lens support frame 25. Similarly, the second direct-acting actuator 132 is also substantially accommodated in a space defined by the concave portion 27, a surface including the flat surface 25X, and a surface of the lens support frame 25 including a surface on the back side of the flat surface 25X. However, the present invention is not limited to this. For example, the thickness of the motor case 132c (the dimension in the direction along the optical axis OP in FIG. 1)
May be larger than the thickness of the lens support frame 25.

In the right end face 25B, holes 29a and 29b extending parallel to the upper end face 25A toward the inside of the lens support frame 25 and having a predetermined depth are formed near the upper end and the lower end. The U-shaped guide bar 61 has lateral guide portions 61a and 61b whose respective axial directions are parallel to each other.
And a vertical guide 61c connecting the horizontal guides 61a and 61b. The axial length of the vertical guide 61c is substantially equal to the distance between the holes 29a and 29b.
The hole 29a has a lateral guide portion 61a of the guide bar 61,
A lateral guide 61b is slidably inserted into the hole 29b.

The vertical guide portion 61c of the guide bar 61 is inserted into the projection 11 formed on the inner wall surface of the outer frame of the optical apparatus, and is supported by the projection 11 so as to be able to reciprocate vertically.

A pin 151 protrudes near a corner where the upper end surface 25A and the right end surface 25B of the lens support frame 25 are orthogonal to each other. Pin 151 has an end 152a of coil spring 152
Has been fixed. The other end 152b of the coil spring 152 is hung on a projection (not shown) on the inner wall of the outer frame of the optical device, and moves the lens support frame 25 toward the optical axis point on a plane perpendicular to the optical axis OP. In the direction approaching at 45 degrees. That is, the coil spring 152
Shaft 131b of first direct-acting actuator 131
And the shaft 1 of the second linear actuator 132
The ball at the tip of 32b always faces the surface 26a of the recess 26,
The lens support frame 25 is urged so as to abut against the surface 27a of the recess 27 with an equal urging force.

When the rotor of the stepping motor 131a of the first direct-acting actuator 131 rotates forward, the shaft 131b projects in the x1 direction (see FIG. 2), and the lens support frame 25 is displaced in the x1 direction. Stepping motor 1
When the rotor 31a rotates in the reverse direction, the shaft 131b is pulled in the x2 direction (see FIG. 2), and the lens support frame 25 is displaced in the x2 direction by the urging force of the coil spring 152.

When the rotor of the stepping motor 132a of the second linear actuator 132 rotates forward, the shaft 132b projects in the y1 direction (see FIG. 2), and the lens support frame 25 is displaced in the y1 direction. Stepping motor 1
When the rotor 32a rotates in the reverse direction, the shaft 132b is retracted in the y2 direction (see FIG. 2), and the lens support frame 25 is displaced in the y2 direction by the urging force of the coil spring 152.

FIG. 3 is a block diagram of a correction lens drive circuit for correcting the movement of the optical axis in the horizontal direction in the first embodiment. The horizontal gyro sensor 340, the horizontal VF converter 341, and the horizontal drive circuit 342 are connected to the stepping motor 131a of the first linear actuator 131. Note that the correction lens drive circuit for correcting the movement of the optical axis in the vertical direction has the same configuration, and the vertical gyro sensor, the vertical VF converter, and the vertical drive circuit include the second linear motion actuator 132. Stepper motor 132
a.

The horizontal gyro sensor 340 detects the direction of movement of the optical device with respect to a reference position caused by camera shake and the like and the angular velocity thereof, and outputs a voltage signal corresponding to the detected direction. In the horizontal VF converter 341, the angular velocity of the movement of the optical device output from the horizontal gyro sensor 340 is multiplied by a predetermined correction coefficient to perform frequency conversion. The correction coefficient is determined in consideration of the image magnification of the optical system of the entire optical device including the correction lens. The frequency signal output from the horizontal VF converter 341 is input to the horizontal drive circuit 342, and is converted into a two-phase drive pulse in the horizontal drive circuit 342.
The horizontal drive circuit 342 is connected to the stepping motor 131a of the first direct-acting actuator 131, and is driven by a two-phase drive pulse output from the horizontal drive circuit 342. Also, the lateral gyro sensor 340
The voltage signal in the moving direction of the optical device output by
The signal is input to the stepping motor 131a via the F converter 341 and the horizontal drive circuit 342.

FIG. 4 shows the horizontal gyro sensor 340, the horizontal VF converter 341 and the horizontal driving circuit 3 of the first embodiment.
It is a graph which shows the output waveform regarding the angular velocity of the optical device from 42. When the camera shake is severe and the angular velocity of the movement of the optical device is high, the output voltage from the horizontal gyro sensor 340 is high, and the frequency output from the horizontal VF converter 341 is correspondingly high. When the angular velocity of the movement of the optical device is low, the output voltage from the horizontal gyro sensor 340 is low, and the output frequency of the horizontal VF converter 341 is correspondingly low. The horizontal drive circuit 342 outputs a pulse width of 2 corresponding to the output frequency of the horizontal VF converter 341.
A phase drive pulse signal is output.

Further, the rotor of the stepping motor 131a is set to switch between normal rotation and reverse rotation depending on the phase difference between the two-phase drive pulse signals. In the horizontal driving circuit 342, the shaft 131b is moved in the direction to cancel the image blur.
And outputs a two-phase drive pulse for rotating the rotor of the stepping motor 131a so that the lens housing frame 25 is pressed via the.

That is, when the gyro sensor 340 detects that the optical device has moved in the x2 direction, the horizontal driving circuit 342 causes the rotor of the stepping motor 131a to rotate forward with the number of pulses corresponding to the speed of the image movement. A phase drive pulse is output. When the rotor of the stepping motor 131a rotates forward, the lens support frame 25 is driven in the x1 direction at a speed that negates the speed of image movement as described above.
Further, when the gyro sensor 340 detects that the optical device has moved the optical axis in the x1 direction, the lateral drive circuit 342
Outputs a two-phase drive pulse for reversing the rotor of the stepping motor 131a with the number of pulses corresponding to the speed of the image movement. When the rotor of the stepping motor 131a rotates in the reverse direction, the lens support frame 25 is driven in the x2 direction at a speed that negates the speed of image movement as described above.

That is, when the direction and speed of movement of the optical device are detected by the gyro sensor, the first direct-acting actuator 131 and the second
Of the lens supporting frame 25 by the
Is driven in a plane perpendicular to the optical axis of the correction lens 28.

FIG. 5 is a perspective view of binoculars according to a second embodiment of the present invention, and FIG. 6 is a front view. The lens support frame 20 includes holding units 20L, 20R that hold the correction lenses 21 and 22,
And a connecting portion 20C connecting the holding portions 20L and 20R. The holding portions 20L and 20R are provided at symmetrical positions and are flat plates having a thickness sufficient to fix the correction lenses 21 and 22. The connecting portion 20C has a substantially cubic shape, and has an opening 23 formed therein. Opening 23
Are surfaces 23a which are parallel to a surface including the optical axis Ol of the correction lens 21 and the optical axis Or of the correction lens 22 and face each other;
23b and surfaces 23c and 23d which are perpendicular to the surfaces 23a and 23b and oppose each other.

The opening 23 has the same structure as the first embodiment.
And a second direct-acting actuator 132 are provided. The tip of the shaft 131b of the first linear actuator 131 contacts the surface 23c of the opening 23, and the second linear actuator 132
Of the shaft 132b is in contact with the surface 23a of the opening 23. The first direct-acting actuator 131 and the second direct-acting actuator 132 are arranged such that the driving directions of the respective movable parts are orthogonal to the optical axes Ol and Or, and are parallel to the optical axes Ol and Or. It is arranged along the direction. In addition, the first direct acting actuator 13
The first stepping motor 131a and the stepping motor 132a of the second linear actuator 132
It is fixed to the inner wall surface of the outer frame of the binoculars by a support member (not shown).

A pin 151 projects from the upper end of the connecting portion 20C near the holding portion 20R. Pin 151
The end 15 of the coil spring 152 is the same as that of the first embodiment.
2a is fixed. The other end 152b of the coil spring 152 is hung on a projection (not shown) on the inner wall of the outer frame of the binoculars.
The lens support frame 20 is urged in a direction approaching the plane including the optical axis 22 at 45 degrees. That is, the ball at the tip of the shaft 131 b of the first direct-acting actuator 131 is always in contact with the surface 2 of the opening 23.
3c and a second direct acting actuator 132
The ball at the tip of the shaft 132b always has the opening 23
The lens support frame 20 is urged so as to contact the surface 23a of the lens support frame.

On the left end face of the holder 20L, a holder 20L
Holes 20a and 20b extending in a direction parallel to the plane including the optical axes Ol and Or and perpendicular to the optical axes Ol and Or, and having predetermined depths are formed in the vicinity of the upper and lower ends. ing. A similar hole 2 is formed on the right end face of the holding portion 20R.
0c and 20d are provided.

The U-shaped guide bar 61 has lateral guide portions 61a and 61b whose axial directions are parallel to each other.
It comprises a vertical guide portion 61c connecting the horizontal guide portions 61a and 61b. The axial length of the vertical guide portion 61c is substantially equal to the distance between the holes 20a and 20b of the holding portion 20L. The lateral guides 61a and 61b of the guide bar 61 are slidably inserted into the holes 20a and 20b, respectively.

The guide bar 62 has, similarly to the guide bar 61, a lateral guide portion 62 whose respective axial directions are parallel.
a, 62b and a vertical guide portion 62c connecting the horizontal guide portions 62a and 62b, and has a U-shape. The axial length of the vertical guide portion 62c is substantially equal to the distance between the holes 20c and 20d of the holding portion 20R. Hole 20
c and 20d have lateral guide portions 62 of the guide bar 62.
a, the lateral guide 62b is slidably inserted.

That is, the lens support frame 20 is
1 and 62, the ends of the lateral guide portions 61a and 61b of the guide bar 61 are 20a and 2b, respectively.
It is possible to reciprocate in the lateral direction within a range in which it contacts the bottom of the hole 0b and the tips of the lateral guide portions 62a and 62b of the guide bar 62 contact the bottoms of the holes 20c and 20d, respectively.

The vertical guide portion 61c of the guide bar 61 is inserted into the projection 12 formed on the inner wall surface of the outer frame of the binoculars, and is supported by the projection 12 so as to be able to reciprocate in the vertical direction. Similarly, the vertical guide portion 62 of the guide bar 62
The reference numeral “c” passes through a protrusion 13 formed on the inner wall surface of the outer frame, and is supported by the protrusion 13 so as to be capable of reciprocating vertically.

When the rotor of the stepping motor 131a of the first linear motion actuator 131 rotates forward, the shaft 131b projects in the x1 direction (see FIG. 6), and the lens support frame 20 is displaced in the x1 direction. Stepping motor 1
When the rotor 31a rotates in the reverse direction, the shaft 131b is retracted in the x2 direction (see FIG. 6), and the lens support frame 20 is displaced in the x2 direction by the urging force of the coil spring 152.

When the rotor of the stepping motor 132a of the second linear actuator 132 rotates forward, the shaft 132b projects in the y1 direction (see FIG. 6), and the lens support frame 20 is displaced in the y1 direction. Stepping motor 1
When the rotor 32a rotates in the reverse direction, the shaft 132b is retracted in the y2 direction (see FIG. 6), and the lens support frame 20 is displaced in the y2 direction by the urging force of the coil spring 152.

Gyro sensors, VF converters, and the like similar to those in the first embodiment are provided for the stepping motors 131a and 132a.
The drive circuit is connected. Therefore, the stepping motor 1 is moved according to the movement of the binoculars from the reference position due to camera shake.
The rotors 31a and 132a rotate by a predetermined number of pulses in a predetermined direction, and the lens frame 20 is driven so as to cancel the image movement, so that the image blur is corrected.

FIG. 7 is a perspective view of an image blur correction mechanism according to a third embodiment of the present invention, and FIG. 8 is a front view. 7 and 8, the same members as those in the first embodiment are denoted by the same reference numerals. The first direct-acting actuator 133 is provided in the recess 26.
The second direct-acting actuator 134 is disposed in the recess 27. The first direct-acting actuator 133 includes a stepping motor 133 a and a shaft 13.
3b and 133c. Stepping motor 133
“a” includes a motor case 133d and a rotor (not shown) provided in the motor case 133d, and the rotor can rotate forward and backward around an axis along a lateral direction.

The shafts 133b and 133c rotate integrally with the rotor in the rotation direction of the rotor and are supported so as to be movable with respect to the rotor in the axial direction. Lead screws (not shown) are formed on the outer peripheral surfaces of the shafts 133b and 133c.
At 33d, it is screwed into a female screw (not shown) formed on a bearing provided at a corresponding portion.

That is, the shaft 133b rotates and protrudes along its axial direction with respect to the forward rotation of the rotor, the shaft 133c is retracted while rotating, and the shaft 133b rotates while the rotor 133 rotates in the reverse direction. The shaft 133c is retracted along the axial direction and projects while rotating. A ball (not shown) is embedded at the tip of each of the shafts 133b and 133c, and the ball presses a target. The tip of the shaft 133b always abuts on the surface 26a of the concave portion 26, and
The tip of c is always in contact with the surface 26b of the recess 26.

The second direct-acting actuator 134 has the same configuration, and the rotor of the stepping motor 134a can rotate forward and backward about an axis extending in the vertical direction.
For the forward rotation of the rotor, the shaft 134b projects along the axial direction while rotating, the shaft 134c is retracted while rotating, and the shaft 134b rotates along the axial direction for the reverse rotation of the rotor. The shaft 134c is retracted and protrudes while rotating. The tips of the shafts 134b and 134c are always in contact with the surfaces 27a and 27b of the recess 27, respectively.

When the rotor of the stepping motor 133a is rotated forward, the shaft 133b projects in the x1 direction (see FIG. 8) and the shaft 133c is retracted, so that the lens support frame 25 is displaced in the x1 direction, and When reversed, the shaft 133c becomes x
The lens 133 protrudes in two directions (see FIG. 8) and the shaft 133b is retracted, so that the lens support frame 25 is displaced in the x2 direction.

Similarly, when the rotor of the stepping motor 134a is rotated forward, the shaft 134b moves in the y1 direction (FIG. 8).
And the shaft 134c is retracted, the lens support frame 25 is displaced in the y1 direction, and when the rotor of the stepping motor 134b is reversed, the shaft 1
34c protrudes in the y2 direction (see FIG. 8), and the shaft 13
Since 4b is retracted, the lens support frame 25 is displaced in the y2 direction.

A gyro sensor, a VF converter and a drive circuit similar to those of the first and second embodiments are connected to the stepping motors 133a and 134a. Rotors in the stepping motors 133a and 134a are rotated by a predetermined number of pulses in a predetermined direction in accordance with the movement of the optical device from the reference position detected by the gyro sensor. As a result, since the lens support frame 25 is pressed so as to cancel the image movement, the image blur is corrected.

FIG. 9 is a perspective view of an image blur correcting mechanism according to a fourth embodiment of the present invention, and FIG. 10 is a front view. 9 and 1
At 0, the same members as those of the second and third embodiments are denoted by the same reference numerals. The opening 23 is provided with a first direct-acting actuator 133 and a second direct-acting actuator 134 similar to those in the third embodiment. The shafts 133b and 133c of the first linear actuator 133
Is always in contact with the surfaces 23c and 23d of the opening 23. The distal ends of the shafts 134b and 134c of the second direct-acting actuator 134 are
23b is always in contact. A gyro sensor, a VF converter, and a drive circuit are connected to the stepping motor 133a of the first direct-acting actuator 133 and the stepping motor 134a of the second direct-acting actuator 134, respectively, as in the third embodiment. ing.

Therefore, the lens support frame 20 is pressed so as to cancel the movement of the binoculars from the reference position detected by the gyro sensor, and the image blur can be corrected.

As described above, according to the first to fourth embodiments, the direct-acting actuator for driving the lens support frame is provided in the concave portion or the opening portion of the lens support frame.
The device does not increase in size.

Further, since the lens supporting frame is pressed vertically and horizontally by a direct-acting actuator, the control is simplified.

According to the first and second embodiments, since the lens frame is always urged in the predetermined direction by the coil spring, no backlash occurs when driving the shaft of the direct acting actuator.

According to the second and fourth embodiments, in an optical apparatus having two left and right telephoto optical systems, the left and right correction lenses are held in a single lens frame, and the left and right images are driven by driving the lens frames. Since the shake is corrected, the drive control of the correction lens is simplified.

[0055]

As described above, according to the present invention, it is possible to obtain an image blur correction mechanism whose configuration and control are simple.

[Brief description of the drawings]

FIG. 1 is a perspective view of an image blur correction mechanism according to a first embodiment of the present invention.

FIG. 2 is a front view of the image blur correction mechanism according to the first embodiment.

FIG. 3 is a block diagram of an image blur correction mechanism according to the first embodiment.

FIG. 4 is a graph showing output waveforms from each block of the image blur correction mechanism of the first embodiment.

FIG. 5 is a perspective view of an image blur correction mechanism according to a second embodiment of the present invention.

FIG. 6 is a front view of an image blur correction mechanism according to a second embodiment.

FIG. 7 is a perspective view of an image blur correction mechanism according to a third embodiment of the present invention.

FIG. 8 is a front view of an image blur correction mechanism according to a third embodiment.

FIG. 9 is a perspective view of an image blur correction mechanism according to a fourth embodiment of the present invention.

FIG. 10 is a front view of an image blur correction mechanism according to a fourth embodiment.

[Explanation of symbols]

20, 25 Lens support frame 21, 22, 28 Correction lens 23 Opening 26, 27 Recess 131, 133 First direct-acting actuator 132, 134 Second direct-acting actuator 131a, 132a, 133a, 134a Stepping motor 131b , 132b, 133b, 133c, 134b,
134c shaft

Claims (14)

[Claims] A lens housing for holding a correction lens for correcting an image blur caused by a camera shake; and a movable portion, wherein the movable portion directly pushes a part of the lens housing to move the lens housing. A linear motion actuator that reciprocates along a predetermined direction in a plane orthogonal to the optical axis of the correction lens, wherein at least a part of the linear motion actuator has the lens housing. An image blur correction mechanism, wherein the image blur correction mechanism is disposed in an open space formed in the portion. 2. The image blur correction mechanism according to claim 1, wherein the open space is a cutout formed in a part of the lens housing. 3. A linear actuator according to claim 1, wherein
A first direct-acting actuator having a movable part for reciprocating the lens housing along a first direction in the plane; and a second linear actuator having a second movable part, wherein the lens housing is arranged in the plane. The image blur correction mechanism according to claim 2, further comprising: a second direct-acting actuator that reciprocates in a second direction orthogonal to the first direction. 4. The notch includes a first surface and a second surface perpendicular to the first direction, and a third surface continuous with the first and second surfaces and perpendicular to these surfaces. A first concave portion having a first surface, a fourth surface and a fifth surface perpendicular to the second direction, and a sixth surface continuous to the fourth and fifth surfaces and perpendicular to these surfaces. A second recess, the first recess being
Is disposed in the first recess,
4. The image blur correction mechanism according to claim 3, wherein the second direct-acting actuator is provided in the second concave portion. 5. The notch includes first and second surfaces perpendicular to the first direction, and a third surface perpendicular to the second direction and perpendicular to the first and second surfaces. 4. The image blur correction mechanism according to claim 3, wherein the first and second direct-acting actuators are disposed in the opening. 4. 6. A binocular having a pair of telephoto optical systems, wherein the correction lens is provided in each of the pair of telephoto optical systems and is integrally held in the lens housing. The image blur correction mechanism according to claim 4 or 5, wherein 7. The image blur correction mechanism according to claim 6, wherein the opening is provided between the correction lenses of the pair of telephoto optical systems. 8. The image blur correction according to claim 7, wherein the first and second linear motion actuators are disposed along an axial direction parallel to an optical axis of the correction lens. mechanism. 9. The movable portion of the first direct-acting actuator contacts the first and second surfaces, and the movable portion of the second direct-acting actuator contacts the fourth and fifth surfaces. The image blur correction mechanism according to claim 4, wherein the mechanism is in contact with the image blur correction mechanism. 10. The movable portion of the first linear actuator contacts the first and second surfaces, and the movable portion of the second linear actuator contacts the third and fourth surfaces. The image blur correction mechanism according to claim 5, wherein the mechanism is in contact with the image blur correction mechanism. 11. The movable member of the first direct-acting actuator always contacts the first surface, and the movable portion of the second direct-acting actuator always contacts the fourth surface. 5. The image blur correction mechanism according to claim 4, further comprising an urging means for urging the lens housing. 12. The movable member of the first direct-acting actuator is always in contact with the first surface, and the movable portion of the second direct-acting actuator is always in contact with the third surface. 6. The image blur correction mechanism according to claim 5, further comprising an urging means for urging the lens housing. 13. The image blur correction mechanism according to claim 11, wherein said urging means is a coil spring. 14. A lens storage unit for holding a correction lens for correcting image blur caused by camera shake, and a movable unit, wherein the movable unit directly pushes a part of the lens storage unit to move the lens storage unit. A linear motion actuator that reciprocates along a predetermined direction in a plane orthogonal to the optical axis of the correction lens, wherein a part of an outer edge of the lens housing portion is the linear motion type. A portion extending along the driving direction of the movable portion facing the casing of the actuator, and a portion connected to an end of the portion extending along the driving direction and abutting on the tip of the movable portion. An image blur correction mechanism.