JP2003222921A - Optical apparatus having vibration isolating processing function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make observation of an image aligned to the direction of a lens barrel possible even if a battery is removed during vibration isolation processing of binoculars of a type to perform the vibration isolation processing by the power supply from the battery. <P>SOLUTION: The opening and closing of a lid of a battery case are checked (S412) when a power source switch of the binoculars is on, the output level of the power source battery exceeds the respective threshold and a vibration isolation start switch is on. When the lid is confirmed to be open, driving frames in a vertical direction and a horizontal direction are driven to respective reset positions and are driven to their respective movable central positions to turn off the power source. When the lid is held closed, the vibration isolation processing in the vertical direction and the horizontal direction are executed (S416 and S418). The power source switch, the output level of the power source battery, the vibration isolation start switch, the check of opening and closing of the lid and the vibration isolation processing are repetitively executed at every 1 ms (millisecond). <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device having an image stabilization function for correcting image blur caused by camera shake or the like.

[0002]

2. Description of the Related Art Conventionally, some optical devices such as binoculars are provided with an image stabilization function for correcting image blur caused by camera shake. For example, in binoculars, the image stabilization function is a shake detection unit that detects a shake of the optical axes of the left and right telescopic optical systems, a pair of correction optical systems, and a pair of correction optical systems in a plane perpendicular to the optical axis. It is realized by a driving means that is two-dimensionally driven. The pair of correction optical systems are arranged, for example, between the objective optical system and the image inverting optical system so as to form a part of the left and right telescopic optical systems of the binoculars. When the binoculars vibrate due to camera shake or the like, the shake detecting means detects the shake of the optical axis of the telescopic optical system. The correction optical system is driven by the drive unit along two axes that are orthogonal to each other in a plane perpendicular to the optical axis so that the shake of the optical axis is canceled out. As a result, image shake of the observation image obtained via the telephoto optical system is prevented.

As a driving means of the correction optical system, there is a type using a stepping motor. Rotational motion of the rotor (rotor) of the stepping motor is converted into linear motion along the thrust direction of the shaft via the screw feed mechanism, and the pair of correction optical systems is held in conjunction with the displacement of the shaft along the thrust direction. The member is driven. Therefore,
By controlling the current flowing through the coil of the stator (stator) of the stepping motor, the drive direction and drive amount of the holding member of the correction optical system are controlled.

As described above, since the screw feed mechanism is used for converting the rotational movement of the rotor into the linear movement of the shaft, the rotor is rotated to such an extent that the power supply to the stepping motor is stopped. It is extremely unlikely that an external force that causes an external torque is applied in the thrust direction of the shaft. In other words, when the supply of the drive current to the stepping motor is stopped, the rotor stops and the shaft stops at the current position in the thrust direction. As a result, the correction optical system is fixed at the position when the power supply was stopped.

Such an image stabilization function does not always operate during use of the binoculars. For example, the start and stop of the operation of the prevention processing function is controlled by operating the anti-vibration button provided at a predetermined position on the outer peripheral surface of the housing of the binoculars. That is, the image stabilization function is a function that can be selectively operated depending on the situation. The image stabilization function is a function that operates independently of other functions such as the focusing function and the interpupillary distance adjusting function. Therefore, observation with binoculars is possible without activating the image stabilization function.

By the way, generally, an optical device such as binoculars is an optical device that a user carries to an arbitrary place where an object to be observed is used. Therefore, in such an optical device, a battery is used as a power source for supplying electric power to the stepping motor so as not to hinder the carrying of the optical device. Further, the use of the battery not only improves the portability of the optical device, but also has the advantage that it can be easily attached and detached.

[0007]

As described above, the power supply by the battery is preferable from the viewpoint of portability and operability of the optical device, but the battery may be easily taken in and out, which may cause a problem. For example, if the battery is inadvertently removed during the operation of the image stabilization function and the power supply is stopped, the optical axes of the other optical systems and the optical axis of the correction optical system that make up the telephoto optical system are intervened by the screw feed mechanism. It is highly possible that the correction optical system stays in a state where they do not match.

In the case of binoculars, as described above, observation with binoculars is possible even if the image stabilization function does not operate. Therefore, if the correction optical system stops in such a state, a deviation occurs between the direction in which the lens barrel of the binoculars actually faces the observation target and the image of the observation target obtained through the telescopic optical system. However, there is a problem that the user feels uncomfortable.

The present invention is intended to solve the above problems, and in an optical device having an image stabilization function, prevents the occurrence of a deviation between the direction of the lens barrel and the image confirmed through the optical system. With the goal.

[0010]

An optical device having an image stabilization function according to the present invention comprises a blur detecting means for detecting a blur amount of the optical device and a correction for correcting an image blur due to the blur of the optical device. Driving the optical system and the correction optical system so that the correction optical system is driven to cancel the shake amount of the optical device and the drive unit that keeps the position of the correction optical system fixed and held in a state where power is not supplied. A lid opening / closing detecting means for detecting an open / closed state of a lid member that protects a battery housing portion that houses the power source battery, and a lid opening / closing detecting means. When the opening of the lid member is detected by the control means, the control means causes the correction optical system to reach a reference position where the optical axis of the correction optical system and the optical axes of the other optical systems forming the imaging optical system of the optical device coincide with each other. It is characterized by driving.

[0011] Alternatively, after the lid opening / closing detecting means detects the opening of the lid member and the correction optical system is driven to the reference position, the power supply from the power supply battery is stopped.

[0012] Optionally, a capacitor connected to the power supply battery is provided so that opening and closing of the lid member and start and stop of power supply from the power supply battery are interlocked with each other. When the power supply is started, the capacitor is charged, and when the lid member is opened, the power supply to the optical device is switched from the power supply battery to the capacitor, and the drive to the reference position of the correction optical system is supplied from the capacitor. Is based on.

Further, an optical device having an image stabilization function according to the present invention has a correction optical system for correcting an image blur caused by a shake of the optical device, and a correction optical system for canceling the shake of the optical device. It has an anti-shake function to correct image shake by driving the system, and when power is not supplied to the optical equipment, the correction optical system uses its optical axis and other optical elements that make up the imaging optical system of the optical equipment. It is characterized in that it is always positioned at a position that coincides with the optical axis of the system.

As described above, according to the present invention, when the lid member of the battery accommodating portion of the power supply battery is opened, the correction optical system is driven to the movable center position. Therefore, even if the user inadvertently opens the lid member and removes the power supply battery during the operation of the image stabilization function, the optical axes of the correction optical system and the optical axes of other optical systems forming the imaging optical system are The phenomenon that the correction optical system is fixed in a mismatched state is avoided.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram schematically showing the positional relationship of each optical system of binoculars to which the first embodiment according to the present invention is applied. In the first optical system 10, the light flux that has passed through the first objective lens 21 passes through the first correction lens 31, is guided to the first eyepiece lens 51 via the first erecting prism 41, and In the optical system 11, the light flux that has passed through the second objective lens 22 passes through the second correction lens 32 and is guided to the second eyepiece lens 52 through the second erecting prism 42. The first correction lens 31 and the second correction lens 32 are integrally supported by the lens support frame 30. The optical axis OP1 of the first optical system 10 and the second optical system 11
The optical axis OP2 of is adjusted to be completely parallel.

In the present specification, the "lateral direction" is parallel to the plane including the optical axes OP1 and OP2 and the optical axes OP1 and O2.
It is a direction orthogonal to P2, and the "vertical direction" is the optical axis OP.
1, the direction perpendicular to the plane including OP2. When the optical axis of the first correction lens 31 and the optical axis of the second correction lens 32 are located in a plane including the optical axes OP1 and OP2, the position of the lens support frame 30 is referred to as “vertical movable center position”. "
Say. Also, the optical axis of the first correction lens 31 is located in a plane that is orthogonal to the plane that includes the optical axes OP1 and OP2 and that includes the optical axis OP1, and that is orthogonal to the plane that includes the optical axes OP1 and OP2 and that is the optical axis OP2. The position of the lens support frame 30 in the case where the optical axis of the second correction lens 32 is located in the plane that includes it is referred to as the “lateral movable center position”.

Further, in this specification, the optical axis of the first correction lens 31 coincides with the optical axes of the other optical systems constituting the first optical system 10, and the optical axis of the second correction lens 32 is the same. The positions of the first and second correction lenses 31 and 32 in the case where is coincident with the optical axis of the other optical system constituting the second optical system 10 are referred to as “reference positions”. That is, the state in which the first and second correction lenses 31 and 32 are in the reference position is a state in which the lens support frame 30 is in the vertical movable center position and in the horizontal movable center position.

FIG. 2 is a front view of the lens support frame 30 of the first embodiment as seen from the first and second objective lenses 21 and 22. The lens support frame 30 is a vertical drive frame 301.
And a lateral drive frame 302. Vertical drive frame 30
Reference numeral 1 is a substantially rectangular flat plate having a donut shape having an opening. The vertical drive frame 301 is a holding member 3 disposed on a flange 1a integrally provided on the inner wall surface 1 of the binocular body.
It is supported by 10 so as to be slidable in the vertical direction. The lateral drive frame 302 includes the first and second correction lenses 31, 32.
Is a flat plate that integrally holds the vertical drive frame 301 and is disposed in the opening of the vertical drive frame 301. The lateral drive frame 302 is supported by a holding member 320 arranged on the vertical drive frame 301 so as to be slidable in the lateral direction.

FIG. 3 is a cross-sectional view of the holding member 320 disposed on the upper ends of the vertical drive frame 301 and the horizontal drive frame 302 in FIG. The holding member 320 is a screw 321,
It has a nut 322 and a washer 323. Screw 32
The first shaft 321a is inserted through a hole 301a formed in the vertical drive frame 301. The shaft 321a is threaded, and a nut 322 is fastened to the end of the screw 321 on the opposite side of the head 321b. A washer 323 is provided between the head 321b and the vertical drive frame 301 and between the nut 322 and the vertical drive frame 301. The radius length of the washer 323 is larger than the length from the end face of the vertical drive frame 301, which is in contact with the end face of the horizontal drive frame 302, to the central axis of the shaft 321a. That is, the lateral drive frame 302 is clamped at its end by a part of the peripheral edge of the washer 323.

The holding member 310 also has the same structure as the holding member 320. The shaft of the screw 311 (see FIG. 2) is inserted through the hole formed in the flange 1a, and a nut (not shown) is provided at the end of the shaft opposite to the head of the screw 311.
Is tightened. A washer 3 is provided between the head of the screw 311 and the flange 1a and between the nut and the flange 1a.
13 (see FIG. 2) is arranged, and the end portion of the vertical drive frame 301 is held by a part of the peripheral edge portion of the washer 313.

FIG. 4 is a sectional view taken along the line AA of FIG.
The actuator of the present embodiment will be described with reference to FIGS. 2 and 4. The vertical actuator 330 includes the first and second erecting prisms 41 and 42 (see FIG. 1).
And is positioned at the vertical center of the vertical drive frame 301 and the horizontal drive frame 302. The vertical actuator 330 includes a stepping motor 331 and a shaft 332. Stepping motor 331
Is composed of a motor case 331a and a motor 331b provided in the motor case 331a. The motor 331b includes a rotor and a rotor drive coil, and the rotor rotates by adjusting the current supplied to the drive coil. In response to the rotation of the rotor, the motor 331b rotates in the forward and reverse directions about the axis along the vertical direction. The shaft 332 is a motor 331b.
Rotates integrally with the motor 331b in the rotation direction of
It is supported so as to be movable with respect to the motor 331b in the axial direction. A lead screw is formed on the outer peripheral surface of the shaft 332 and is screwed with a female screw (not shown) formed on the bearing of the motor case 331a.
That is, the shaft 332 moves forward and backward along the axial direction of the motor 331b with respect to the forward and reverse rotations thereof, while rotating.

A ball is embedded in the tip of the shaft 332, and the ball presses the target object. The motor case 331a is attached to the flange 1 by the first fixing member 333.
It is fixed to a. The tip of the shaft 332 is a first pressed member 33 fixed to the lower end of the vertical drive frame 301.
It is in contact with 4.

A first coil spring 391 is arranged near the side end of the vertical drive frame 301 on the side where the first and second objective lenses 21 and 22 are arranged. First
Both ends of the coil spring 391 have a hook shape, and are fitted in the vicinity of the lower end of the vertical drive frame 301 with a screw 392 fitted near the upper end of the flange 1a in FIG. It is engaged with the screw 393. That is, the first coil spring 391 applies a biasing force in the y1 direction to the vertical drive frame 301. Therefore, the shaft 33
The tip of the second member 2 is always in contact with the first pressed member 334.

Vertical drive frame 301 and horizontal drive frame 3
In the vicinity of the lower end of 02, a lateral actuator 340 is disposed on the first and second objective lenses 21 and 22 (see FIG. 1) side, and the longitudinal drive frame 301 and the lateral drive frame 302 are vertically oriented. It is arranged on the side where the first correction lens 31 is arranged with respect to the center of the direction. The lateral actuator 340 includes a stepping motor 341 and a shaft 342. The stepping motor 341 includes a motor case 341a and a motor 341b provided in the motor case 341a. The motor 341b includes a rotor and a rotor drive coil, and the rotor rotates by adjusting the current supplied to the drive coil. In accordance with the rotation of the rotor, the motor 341b rotates in the forward and reverse directions about the axis along the vertical direction. The shaft 342 rotates integrally with the motor 341b in the rotation direction of the motor 341b, and is supported so as to be movable with respect to the motor 341b in the axial direction. A lead screw is formed on the outer peripheral surface of the shaft 342 and is screwed into a female screw (not shown) formed on the bearing of the motor case 341a. That is, with respect to the forward and reverse rotations of the motor 341b, the shaft 34
While rotating, 2 moves back and forth along its axial direction.

A ball is embedded in the tip of the shaft 342, and the ball presses the target object. The motor case 341a is attached to the flange 1 by the second fixing member 343.
It is fixed to a. The tip of the shaft 342 is the second pressed member 34 fixed to the lower end of the lateral drive frame 302.
It is in contact with 4.

A second coil spring 396 is provided at the upper end of the vertical drive frame 301 on the side where the first and second objective lenses 21 and 22 are provided. Both ends of the second coil spring 396 have hook shapes.
One end of the second coil 396 has a vertical drive frame 30.
It is engaged with a screw 397 fitted in the vicinity of the end on the side where the first correction lens 31 is disposed at the upper end of the No. 1. The other end is engaged with a hole 398a formed in a flange 398 fixed to a substantially central portion of the upper end of the lateral drive frame 302. That is, the second coil spring 396 applies a biasing force to the lateral drive frame 302 in the x1 direction. Therefore, the tip of the shaft 342 is always in contact with the second pressed member 344.

When the motor 331b rotates normally, the shaft 3
The reference numeral 32 projects in the y2 direction (downward) while rotating. The movement of the shaft 332 in the y2 direction is caused by the first pressed member 3
It is transmitted to the vertical drive frame 301 via 34. As described above, since the vertical drive frame 301 is slidably supported by the flange 1a, the vertical drive frame 301 is attached to the motor 33.
According to the forward rotation of 1b, the first coil spring 391 is driven in the y2 direction against the urging force in the y1 direction. On the other hand, when the motor 331b rotates in the reverse direction, the shaft 332 is pulled in the y1 direction (upward) while rotating, and the vertical drive frame 301 is driven by the urging force of the first coil spring 391 in the y1 direction.
Are driven in the y1 direction.

When the motor 341b rotates normally, the shaft 3
42 is projected in the x2 direction (leftward in FIG. 2) while rotating. The movement of the shaft 342 in the x2 direction is transmitted to the lateral drive frame 302 via the second pressed member 344. As described above, since the lateral drive frame 302 is slidably supported by the vertical drive frame 301, the lateral drive frame 302 moves in the x1 direction of the second coil spring 396 in accordance with the normal rotation of the motor 341b. It is driven in the x2 direction against the biasing force of. On the other hand, when the motor 341b rotates in the reverse direction, the shaft 342 is pulled in the x1 direction (rightward in FIG. 2) while rotating, and the lateral drive frame 302 is driven in the x1 direction by the biasing force of the second coil spring 396 in the x1 direction. To be done.

Here, the stepping motors 331 and 34 of the vertical and horizontal actuators 330 and 340 are used.
The maintenance of the position of each motor when the power supply to No. 1 is stopped will be described with reference to FIG. FIG. 5 is a graph showing torque generated when the rotors of the stepping motors 331 and 341 are rotated by an external force, where the vertical axis represents the torque and the horizontal axis represents the rotation angle of the rotor. Curve A is a torque curve when the drive coil is energized so as to stop the rotor at a predetermined position (angle 0 °), and curve B is energized to the drive coil and the rotor is stopped at an angle 0 °. 7 is a torque curve when the drive coil is de-energized in this state.

As shown by the curve A, when the drive coil is energized and the rotor is stopped at the angle of 0 °, the rotor rotates when the external torque acting on the rotor exceeds the holding torque Th. In other words, if the external torque acting on the rotor is smaller than the holding torque Th, the rotor has the position holding ability within the range of ± θ.

On the other hand, when the drive coil is de-energized, the external torque acting on the rotor is the holding torque T.
When the detent torque Td smaller than h is exceeded, the rotor rotates. If the external torque acting on the rotor is smaller than the detent torque Td, the rotor has a position holding ability in the range of ± θ / 4. That is, when the drive coil is not energized, the rotor is likely to rotate with a slight external force. The detent torque means the maximum torque generated by the rotor in an attempt to maintain the original position against the external torque that tries to rotate the rotor in a state where the drive coil is not excited.

In the present embodiment, the transmission mechanism for converting the rotational movement of the stepping motors 331 and 341 into a linear movement and transmitting the linear movement to the vertical drive frame 301 and the horizontal drive frame 302 is the screw feed mechanism as described above. . The external force applied to the binoculars when not energized is transmitted in the thrust direction of the screw feed mechanism of the image shake correction device, that is, in the feed direction of the movable portion, but is transmitted in the rotation direction of the rotor with a reduced reduction ratio and the detent. No torque exceeding the torque Td is generated. Therefore, when the remaining power of the battery decreases and power is not supplied to the stepping motors 331 and 341, the rotor does not rotate in either of the forward and reverse directions, and stops at the position where the power supply was stopped, The drive frames 301 and 302 in the vertical and horizontal directions are also stopped at the positions when the power supply was stopped. That is, the correction lens 31,
32 is a vertical and horizontal actuator 330, 3
When the power supply to 40 is stopped, it is fixedly held at the position at that time.

At the upper end of the lateral drive frame 302, the second
A lateral reset position detection sensor 360 is fixed near the correction lens 32. The lateral reset position detection sensor 360 is a transmissive photo interrupter. The second correction lens 3 is provided at the upper end of the vertical drive frame 301.
In the vicinity of 2, a lateral reset position detecting thin plate 361 is fixed by a screw 321 of the second holding member 320.

As is clear from FIG. 2, the movable range of the vertical drive frame 301 is defined by the inner wall surface of the flange 1a, and the movable range of the horizontal drive frame 302 is the vertical drive frame 30.
1 opening. That is, the vertical drive frame 30
1 does not move further away from the movable center position than the position where the corner portion where the lateral end surface along the lateral direction intersects the lateral end surface along the longitudinal direction contacts the inner wall surface of the flange 1a. Further, the lateral drive frame 302 does not move further away from the movable center position than the position where the side end face along the vertical direction abuts the inner wall surface of the opening of the vertical drive frame 301. In this specification, the vertical drive frame 301 and the horizontal drive frame 30 are used.
The first correction lens 31, when 2 is in these positions,
The position of the second correction lens 32 is referred to as the “movable limit position”.

FIG. 6 shows the lateral reset position detecting sensor 3
FIG. 6 is a diagram showing a positional relationship between 60 and a lateral reset position detecting thin plate 361. Lateral reset position detection sensor 360
Has a concave sectional shape, and a light emitting element and a light receiving element are respectively disposed on the surfaces facing each other with the concave portion 360a interposed therebetween (not shown). Lateral reset position detection thin plate 361
Is the recess 360 of the lateral reset position detection sensor 360.
It is arranged so as to be located at a. That is, the lateral reset position detection sensor 360 fixed to the lateral drive frame 302 moves as the lateral drive frame 302 moves, and the relative positional relationship between the recess 360a and the lateral reset position detection thin plate 361 changes. Then, the voltage output from the lateral reset position detection sensor 360 changes accordingly.

In this embodiment, when the lateral drive frame 302 is positioned at the lateral movable center position, the lateral reset position detection sensor 360 and the lateral reset position detection sensor 360 change so that the voltage output from the lateral reset position detection sensor 360 changes. A lateral reset position detecting thin plate 361 is provided. In this specification, the position of the lateral drive frame 302 when the voltage output from the lateral reset position detection sensor 360 changes is referred to as a “lateral reset position”. In other words, the horizontal reset position is the position where the horizontal drive frame 302 is positioned at the horizontal movable center position by design. That is, the horizontal reset position and the horizontal movable center position match.

FIG. 7 shows a lateral reset position detecting sensor 36.
It is a graph which shows the output signal of 0. Lateral drive frame 302
Is displaced from the lateral reset position in the x2 direction (see FIG. 2), that is, when the lateral reset position detection thin plate 361 is displaced to the + (plus) side in FIG. 6, the lateral reset position detection sensor The luminous flux emitted from the light emitting element of 360 is the lateral reset position detecting thin plate 36.
It is blocked by 1 and does not enter the light receiving element. As a result, the voltage signal output from the lateral reset position detection sensor 360 becomes 0V (volt). On the other hand, when the lateral drive frame 302 is displaced in the x1 direction (see FIG. 2) from the lateral reset position, that is, when the lateral reset position detecting thin plate 361 is displaced to the − (minus) side in FIG. The light flux emitted from the light emitting element of the lateral reset position detecting sensor 360 is not blocked by the lateral reset position detecting thin plate 361 but is incident on the light receiving element. As a result, the voltage signal output from the lateral reset position detection sensor 360 becomes 5V.

That is, by detecting the change from 0V to 5V or the change from 5V to 0V in the voltage signal output from the horizontal reset position detection sensor 360, the horizontal drive frame 302 is moved to the horizontal reset position. Confirmed to have been positioned.

In FIG. 2, a vertical reset position detecting sensor 35 is provided near the upper end of the left end of the vertical drive frame 301.
0 is fixed. Vertical reset position detection sensor 3
50 is the same as the lateral reset position detection sensor 360,
It is a transmissive photointerrupter including a light emitting element and a light receiving element arranged at a predetermined interval. A vertical reset position detecting thin plate 351 is fixed near the upper end of the left end of the flange 1a, and is positioned between the light emitting element and the light receiving element of the vertical reset position detecting sensor 350. The vertical reset position detection sensor 350 and the vertical reset position detection thin plate 3 by the movement of the vertical drive frame 301.
The voltage signal output from the vertical reset position detection sensor 350 changes according to the change in the relative positional relationship of 51.

In this embodiment, the vertical reset position detection sensor 350 and the vertical reset position detection sensor 350 are arranged so that the voltage output from the vertical reset position detection sensor 350 changes when the vertical drive frame 301 is positioned at the vertical movable center position. A vertical reset position detecting thin plate 351 is provided. In this specification, the position of the vertical drive frame 301 when the voltage output from the vertical reset position detection sensor 350 changes is referred to as a “vertical reset position”. That is, the vertical reset position and the vertical movable center position are the same as the horizontal reset position and the horizontal movable center position described above.

When the vertical drive frame 301 is displaced in the y2 direction (see FIG. 2) from the vertical reset position, the light beam emitted from the light emitting element of the vertical reset position detection sensor 350 is for vertical reset position detection. The light is not blocked by the thin plate 351, and is incident on the light receiving element. As a result, the voltage signal output from the vertical reset position detection sensor 350 is 5V. On the other hand, when the vertical drive frame 301 is displaced in the y1 direction (see FIG. 2) from the vertical reset position,
The light flux emitted from the light emitting element of the vertical reset position detection sensor 350 is blocked by the vertical reset position detection thin plate 351, and does not enter the light receiving element. As a result, the voltage signal output from the vertical reset position detection sensor 350 becomes 0V.

That is, similarly to the confirmation of the horizontal reset position, the vertical direction is detected by detecting the change of the voltage signal output from the vertical reset position detection sensor 350 from 0V to 5V or from 5V to 0V. Drive frame 30
1 is confirmed to have been positioned in the reset position.

As described above, in this embodiment, in the lens support frame 30, the vertical drive frame 301 and the horizontal drive frame 30 are provided.
2 is integrated, and the driving mechanism of the correction lens including the linear movement mechanism and the reset position detecting means is integrated into one unit. Therefore, the work of attaching the drive mechanism to the entire binoculars is easy.

In the reset position detecting means of the present embodiment, the thin plate is arranged on the holding member or the flange of the binocular body, and the transmissive photo interrupter is arranged on the drive frame, and the transmissive photo interrupter side moves. However, the present invention is not limited to this. The transmission type photo interrupter is arranged on the holding member or the flange,
The thin plate may be arranged in the drive frame, and the thin plate may move between the light emitting element and the light receiving element of the transmissive photointerrupter. That is, the reset position detection means may have a configuration in which the relative positions of the thin plate and the transmissive photointerrupter change as the drive frame moves, and the output signal of the transmissive photointerrupter changes accordingly.

Further, in the present embodiment, the transmission type photo interrupter is used as the reset position detecting sensor, but the present invention is not limited to this. For example, a reflection type photo interrupter for detecting the presence or absence of the reflected light from the object by the light receiving element. (Photo reflector) may be used. That is, the light emitting element and the light receiving element may be arranged such that their light emitting surface and light receiving surface face the same direction, and a thin plate may be arranged on the side facing the light emitting surface and the light receiving surface. Check the relative positional relationship between the reflective photointerrupter and the thin plate based on whether the light beam emitted from the light emitting element is reflected by the thin plate and enters the light receiving element, and whether the drive frame is positioned at the reset position. Determine whether or not.

Further, as in the case of using the transmissive photo interrupter, the reset position detecting means using the reflective photo interrupter is constructed so that the relative positional relationship between the thin plate and the reflective photo interrupter changes as the drive frame moves. Should have. That is, the thin plate may be disposed on the holding member or the flange and the reflective photo interrupter may be disposed on the drive frame, or the thin plate may be disposed on the drive frame and the reflective photo interrupter may be disposed on the holding member or the flange. It may have a configuration.

FIG. 8 is a block diagram of the vibration isolator of this embodiment. The vertical angular velocity sensor 110 detects the shake direction and angular velocity in the vertical direction when holding the binoculars, and the lateral angular velocity sensor 120 detects the shake direction and angular velocity in the horizontal direction. Vertical angular velocity sensor 11
A vertical direction sensor amplifier 111 is connected to 0, and a vertical direction angular velocity signal output from the vertical direction angular velocity sensor 110 is amplified and output to a control unit 100 such as a microcomputer. Similarly, the lateral angular velocity sensor 1
A horizontal sensor amplifier 121 is connected to 20,
The lateral angular velocity signal output from the lateral angular velocity sensor 120 is amplified and output to the control means 100.

In the control means 100, the vertical direction angular velocity signal and the horizontal direction angular velocity signal are converted into digital values on the basis of a predetermined synchronization signal, and the respective digital values are integrated and calculated, and the vertical direction angular displacement signal which is angle information of camera shake. And the lateral angular displacement signal is calculated. The number of driving steps of the motor 331b of the vertical actuator 330, that is, the number of pulses applied to the motor 331b is calculated based on the vertical angular displacement signal. Similarly, based on the lateral angular displacement signal,
The number of driving steps of the motor 341b of the lateral actuator 340, that is, the number of pulses applied to the motor 341b is calculated.

The rotational movement of the motor 331b of the vertical actuator 330 based on the number of pulses output from the control means 100 is converted into a vertical linear movement via the shaft 332 and is transmitted to the lens support frame 30. 30 is driven in the vertical direction. Similarly, the lateral actuator 3 based on the number of pulses output from the control means 100
The rotational motion of the motor 341b of the motor 40 is converted into a linear motion in the lateral direction via the shaft 342 and transmitted to the lens support frame 30, and the lens support frame 30 is driven in the lateral direction.

The control means 100 includes a vertical reset position detection sensor 350 and a horizontal reset position detection sensor 3.
60 is connected. When the lens support frame 30 is at the vertical reset position, the vertical reset position detection sensor 3
When the signal output from 50 changes and the lens support frame 30 is in the lateral reset position, the signal output from the lateral reset position detection sensor 360 changes and each signal is input to the control means 100. . Control means 100
Then, it is determined that the lens support frame 30 is at the reset position in the vertical and horizontal directions by detecting the change in the signal.

Further, the control means 100 has an EEPROM.
101 is connected. As described above, the horizontal reset position and the horizontal movable center position, and the vertical reset position and the vertical movable center position are designed to coincide with each other. Occurs. The difference between the reset position and the movable center position in the vertical and horizontal directions is stored in the EEPROM 101 in advance. The control means 100 reads this difference from the EEPROM 101, and sets a predetermined pulse number based on the difference so that the lens support frame 30 at the reset position in the vertical and horizontal directions is driven to the movable center position. It outputs to each 341b.

The power supply battery 130 is a power supply for supplying electric power to the vibration isolator of this embodiment. Binoculars power switch 1
When 31 is pressed, the control means 100, the vertical and horizontal angular velocity sensors 110 and 120, and the sensor amplifier 11 are pressed.
1, 121, stepping motors 331b, 341b,
The reset position detection sensor 350, 360, the power supply battery 1
Power is supplied from 30.

Further, the power supply battery 130 is provided with a control means 10 via a signal line separately from a power supply line (not shown).
It is connected to 0. The control means 100 monitors the change in the level of the output voltage of the power supply battery 130 with this signal line at a predetermined cycle.

The EEPROM 101 has a power supply battery 130.
A threshold value VH for determining that the output voltage level of 1 is the battery dead level is stored. The threshold value VH is set such that the motor 331b of the vertical actuator 330 drives the vertical drive frame 301 from the movable limit position to the vertical reset position, further drives to the vertical movable center position, and the motor 341b of the horizontal actuator 340 horizontally. The directional drive frame 302 is set to a level at which electric power for driving the directional drive frame 302 from the movable limit position to the lateral reset position and further driving to the lateral movable center position remains. That is, the threshold VH
The motors 331b and 341b are attached to the lens support frame 30.
The electric power is set to a level at which electric power for driving the motor from the movable limit position to the reference position remains. A specific value of the threshold value VH is stored in the EEPROM 101 after being experimentally obtained in advance during the manufacturing process of the binoculars. That is, an appropriate value is set according to the product individual difference of the binoculars and the vibration isolation device to be mounted.

The control means 100 controls the level of the output voltage of the power supply battery 130 to the threshold value VH stored in the EEPROM 101.
Compare with. As a result of the comparison, the level of the output voltage is the threshold VH.
When it is detected that the battery level is low, the control means 100 determines the vertical drive frame 3 based on the output results of the vertical and horizontal reset position detection sensors.
01 and the lateral driving frame 302 are driven to drive the motors 331b and 341b to the movable center position.

The image stabilization start switch 132 is a switch for starting the above-described image stabilization processing (driving the lens support frame 30 based on the angular velocities detected by the vertical and horizontal angular velocity sensors 110 and 120). The lid opening / closing detection switch 133 is a switch that operates in response to opening / closing of the lid that protects the battery case that houses the power supply battery 130 in the case of the binoculars.

FIG. 9 is a block diagram showing the connection relationship between the circuit elements supplied with power from the power supply battery 130 and the power supply battery 130. The power supply battery 130 includes a control means 100, E
Stepping motors 331b and 341 via the EPROM 101 (see FIG. 8) and the power switch circuit 135
b, the reset position detection sensors 350 and 360, the sensor amplifiers 111 and 121, and the angular velocity sensors 110 and 120 are connected, and when the power switch 131 is pressed, the power switch circuit 133 is turned on and power is supplied from the power battery 130. Is started. When the image stabilization start switch 132 is turned on, the image stabilization process is started, and while the on state continues, the image stabilization process is continuously executed. Lid open / close detection switch 13
3 is a lid 134 of a battery case that houses the power battery 130.
It is provided in. When the lid 134 is opened, the lid opening / closing detection switch 133 is turned on, and a signal indicating the lid opening is input to the control means 100.

The procedure of the image stabilization processing of this embodiment performed by the control means 100 will be described with reference to FIGS. FIG. 10 is a flowchart showing the procedure of the initial processing after the sleep is released. In the control means 100 in the sleep state (standby state), when the power switch 131 is pressed,
The control means 100 cancels the sleep and then executes step S400.
The power switch circuit 135 is turned on. Then, in step S402, the motor 3 of the vertical actuator 330 is
31b and the motor 34 of the lateral actuator 340
1b is driven, the vertical drive frame 301 is driven to the vertical reset position, and the horizontal drive frame 302 is driven to the horizontal reset position. Then, in step S404, E
The difference between the reset position and the movable center position is read from the EPROM 101, and the motor 331b is read based on the difference.
And 341b are driven, the vertical drive frame 301 is driven to the vertical movable center position, and the horizontal drive frame 3 is driven.
02 is driven to the laterally movable center position. Then Fig. 1
1 to step S406.

FIG. 11 is a flow chart showing the processing procedure of the main routine of the image stabilization processing. Step S406
The state of the power switch 131 is detected at, and if the power is off, the process proceeds to step S500 of FIG. 12, and the ending process is executed. If the power is on, the process proceeds to step S408. In step S408, the output level of the power supply battery 130 is EE.
It is compared with the threshold value VH stored in the PROM 101. When it is confirmed that the output level of power supply battery 130 is lower than threshold value VH, the process proceeds to step S500 in FIG. 12 and the ending process is performed. On the other hand, if it is confirmed that the output level of the power supply battery 130 is not below the threshold value VH, the process proceeds to step S410. In step S410, the state of the image stabilization start switch 132 is detected. Anti-vibration start switch 1
If 32 is off, the process proceeds to step S600 in FIG.
If it is on, the process proceeds to step S412. Step S41
In 2, the state of the lid opening / closing detection switch 133 is checked, and it is checked whether the lid 134 is opened. When it is confirmed that the lid opening / closing detection switch 133 is turned on and the lid 134 is opened, the process proceeds to step S500 in FIG. 12, and the ending process is executed. When it is confirmed that the lid opening / closing detection switch 133 is off and the lid 134 is closed, the process proceeds to step S414.

In FIG. 12, when the power switch 131 is off (YES in step S406), the output level of the power battery 130 is lower than the threshold value VH (step S40).
8 is YES), and is a flowchart showing a processing procedure of an ending process executed when the lid 134 of the battery case is opened (YES in step S412). Step S50
At 0, the motor 331b and the motor 341b are driven so that the vertical drive frame 301 is driven to the vertical reset position and the horizontal drive frame 302 is driven to the horizontal reset position. Next, in step S502, EEPRO is set in advance.
The motor 331b and the motor 341b are based on the difference between the reset position and the movable center position read from M101.
Is driven to drive the vertical drive frame 301 to the vertical movable center position and the horizontal drive frame 302 to the horizontal movable center position. After that, in step S504, the motor 331b and the motor 341b are stopped,
In step S506, the power switch circuit 133 is turned off. After that, the control means 100 shifts to the sleep state by itself (S508).

On the other hand, in step S412 of FIG.
4 is confirmed to be closed, and step S414
When proceeding to, the vertical counter and the horizontal counter are set to "0". The value stored in the vertical direction counter is incremented by the number of steps when the motor 331b rotates in the forward direction, and decremented by the number of steps when it is reversed. Also, the value stored in the horizontal direction counter is the motor 341b.
When is normally rotated, the number of steps is added, and when it is reversed, the number of steps is subtracted.

Next, in step S416, vertical image stabilization processing is performed. The vertical vibration isolation process is performed as follows.
In the control means 100, the vertical angular velocity signal output from the vertical angular velocity sensor 110 is A / D converted, an integral operation is performed to calculate a vertical angular displacement signal, and a pulse count number is calculated based on the vertical angular displacement signal. To calculate. Motor 33 of vertical actuator 330 in vertical vibration isolation processing
The pulse count number of 1b is given a plus sign when it is normally rotated and a minus sign when it is reversed. The motor 331b is rotated normally or reversely until the value of the vertical direction counter matches the pulse count number. With the rotation of the motor 331b, the vertical drive frame 301 is driven so as to cancel the shake of the binoculars in the vertical direction, and the image shake in the vertical direction is corrected.

Next, in step S418, a lateral image stabilization process is performed. The horizontal image stabilization process is performed in the same manner as the vertical image stabilization process described above. In the control means 100, the lateral angular velocity signal output from the lateral angular velocity sensor 120 is A /
A D-conversion is performed, an integration operation is performed to calculate a lateral angular displacement signal, and a pulse count number is calculated based on the lateral angular displacement signal. The pulse count number of the motor 341b of the lateral actuator 340 in the lateral vibration isolation process is given a plus sign when it is normally rotated and a minus sign when it is reversed. The motor 341b is normally or reversely rotated until the value of the horizontal counter matches the pulse count number. With the rotation of the motor 341b, the lateral drive frame 302 is driven so as to cancel the shake of the binoculars in the lateral direction, and the image shake in the lateral direction is corrected.

When the vertical image stabilization processing in step S416 and the horizontal image stabilization processing in step S418 are completed, it is determined in step S420 whether a predetermined time has elapsed. The process of step S420 is repeatedly performed until the predetermined time passes, and the process from step S406 is performed after the predetermined time passes. That is, the on / off check of the power switch 131, the level check of the output voltage of the power battery 130, the open / close check of the battery case lid 134, and the image stabilization process are performed at a constant timing. In this embodiment, the predetermined time is 1 ms (millisecond).

FIG. 13 is a flow chart showing the procedure of processing executed when it is confirmed in step S410 that the image stabilization start switch 132 is off. In step S600, the motor 33 of the vertical actuator 330 is
1b and motor 341 of lateral actuator 340
b is driven, the vertical drive frame 301 is driven to the vertical reset position, and the horizontal drive frame 302 is driven to the horizontal reset position. Next, in step S602, as in step S502 of FIG.
And, the motor 341b is driven to drive the vertical drive frame 301 to the vertical movable center position and the horizontal drive frame 302 to the horizontal movable center position.

Next, in step S604, the motor 331b
The motor 341b is stopped, and the process proceeds to step S606. When the state of the power switch 131 is detected in step S606 and the power is off, the process proceeds to step S500 in FIG. 12 and the above-described termination process is performed. If the power is turned on in step S606, the process proceeds to step S608, where the output level of the power supply battery 130 is E as in step S408 of FIG.
It is compared with the threshold value VH stored in the EPROM 101.
When it is confirmed that the output level of power supply battery 130 is lower than threshold value VH, the process proceeds to step S500 in FIG. 12 and the above-described termination process is performed. On the other hand, if it is confirmed that the output level of the power supply battery 130 is not below the threshold value VH, the process proceeds to step S610.

In step S610, the image stabilization start switch 1
The state of 32 is detected again. Anti-vibration start switch 13
If 2 is off, the process returns to step S606, and if it is on, the process proceeds to step S412 in FIG. That is, steps S606 to S6 are performed until the power switch 131 is turned off, the output level of the power battery 130 drops below the threshold value VH, or the image stabilization start switch 132 is turned on.
10 is repeated.

As described above, according to the present embodiment, when the lid 134 is opened during execution of the image stabilization processing, the first and second correction lenses 31 and 32 are moved to the movable center positions and then the power is supplied. Is stopped and the image stabilization process is forced to end. That is, the first and second correction lenses 31, 32
The optical axis of is aligned with the optical axes of the other optical systems that make up the corresponding telescopic optical system. Therefore, although the image stabilization process is being executed, the user carelessly operates the power supply battery 130.
Even when the binoculars are pulled out after that and the binoculars are continued to be used, it is possible to prevent the observed image from being visually unnatural.

FIG. 14 is a block diagram showing the connection relationship between the circuit elements supplied with power from the power supply battery 130 and the power supply battery 130 in the binoculars to which the second embodiment of the present invention is applied. An electrode (not shown) is provided on the lid 134 of the battery case, and when the lid 134 is closed, the electrode of the lid 134 comes into contact with the power supply battery 130, and electricity can be supplied. A capacitor C1 is connected to the power battery 130. Further, the capacitor C1 has a control means 100 and an EE.
PROM 101 (not shown) and power switch circuit
Stepping motors 331b and 341b via 133
The reset position detection sensors 350 and 360, the sensor amplifiers 111 and 121, and the angular velocity sensors 110 and 120 are connected. The capacitance of the capacitor C1 is large enough to store electric charges capable of supplying electric power for moving the first and second correction lenses 31 and 32 from the position farthest from the movable center position to the movable center position via the reset position. is doing.

When the power supply battery 130 is mounted in the battery case and the lid 134 is closed, the power supply battery 130 is removed from the capacitor C1.
A current flows through the capacitor C1 and charges are accumulated in the capacitor C1. When the charging is completed, the current supply from the power supply battery 130 to the capacitor C1 is stopped.

When the lid 134 of the battery case is opened, the lid opening / closing detection switch 133 is transferred to the control means 100.
While the signal indicating that the lid has been opened is input, the lid 13
Since the contact state between the electrode of No. 4 and the power supply battery 130 is released, the power supply from the power supply battery 130 is stopped, and instead the power is supplied from the capacitor C1.

In the second embodiment, the image stabilization processing is the first
Similar to the embodiment, it is executed according to the processing procedure shown in the flowcharts of FIGS. When the lid 143 of the battery case is opened, the power supply is switched from the power supply battery 130 to the capacitor C1 as described above.
From the detection of the opening of the cover 143 of the battery case in step S412 of 1 to the end of the end processing of FIG.
It is executed by supplying power from 1.

As described above, according to this embodiment, the lid 134 is opened in the binoculars having a structure in which the power supply from the power supply battery 130 is started and stopped in conjunction with the opening and closing of the lid 134 of the battery case. In this case, the power is supplied from the condenser C1 to the first and second correction lenses 31,
32 is moved to the movable center position. Therefore, even if the user carelessly opens the lid 134, there is no sense of discomfort in the visually observed image.

In the first and second embodiments, the stepping motor is used as the actuator, and the correction optical system is two-dimensionally driven in the plane orthogonal to the optical axis thereof. It is needless to say that the present invention is not limited to the above, but the actuator can be applied to other methods such as a DC motor or a combination of a coil and a magnet, and the vibration-proof method such as using a vari-angle prism.

[0075]

As described above, according to the present invention, it is possible to obtain an optical apparatus capable of visually observing an observation image that matches the direction of the lens barrel even if the power supply is accidentally cut off.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a positional relationship of each optical system of binoculars to which a first embodiment according to the present invention is applied.

FIG. 2 is a front view of a lens support frame.

FIG. 3 is a cross-sectional view of a holding member of a lens support frame.

FIG. 4 is a sectional view of a lens support frame.

FIG. 5 is a graph showing a torque curve of a rotor of a stepping motor.

FIG. 6 is a diagram showing a positional relationship between a reset position detection sensor and a reset position detection thin plate.

FIG. 7 is a graph of a voltage signal output from the reset position detection sensor.

FIG. 8 is a block diagram of a vibration isolation device to which the first embodiment is applied.

FIG. 9 is a block diagram showing a connection relationship between a circuit element supplied with power from a power supply battery and the power supply battery.

FIG. 10 is a flowchart showing a processing procedure of initial processing immediately after power-on.

FIG. 11 is a flowchart showing a processing procedure of a main routine of image stabilization processing.

FIG. 12 is a flowchart showing a processing procedure of end processing.

FIG. 13 is a flowchart showing a processing procedure when the image stabilization switch is turned off.

FIG. 14 is a block diagram showing a connection relationship between a circuit element supplied with power from a power supply battery and the power supply battery in binoculars to which a second embodiment according to the present invention is applied.

[Explanation of symbols]

21,22 Objective lens 30 lens support frame 31, 32 correction lens 41, 42 Upright prism 51, 52 eyepiece 130 power battery 310, 320 holding member 311, 321 screw 322 nuts 313 and 323 washers 330 Vertical actuator 340 Lateral actuator 350 Vertical reset position detection sensor 351 Vertical direction reset position detection thin plate 360 lateral reset position detection sensor 361 Horizontal reset position detection thin plate 391 First coil spring 396 Second coil spring

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[Procedure amendment]

[Submission date] November 29, 2002 (2002.11.
29)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0057

[Correction method] Change

[Correction content]

FIG. 9 is a block diagram showing the connection relationship between the circuit elements supplied with power from the power supply battery 130 and the power supply battery 130. The power supply battery 130 includes a control means 100, E
Stepping motors 331b and 341 via the EPROM 101 (see FIG. 8) and the power switch circuit 135
b, the reset position detection sensors 350 and 360, the sensor amplifiers 111 and 121, and the angular velocity sensors 110 and 120 are connected, and when the power switch 131 is pressed, the power switch circuit 135 is turned on and power is supplied from the power battery 130. Is started. When the image stabilization start switch 132 is turned on, the image stabilization process is started, and while the on state continues, the image stabilization process is continuously executed. Lid open / close detection switch 13
3 is a lid 134 of a battery case that houses the power battery 130.
It is provided in. When the lid 134 is opened, the lid opening / closing detection switch 133 is turned on, and a signal indicating the lid opening is input to the control means 100.

Claims (4)

[Claims] 1. A shake detection unit for detecting a shake amount of an optical device, a correction optical system for correcting an image shake caused by a shake of the optical device, and a correction optical system driven in a state in which power is not supplied. A driving unit that keeps the position of the correction optical system fixed; a control unit that controls the driving unit so that the correction optical system is driven so as to cancel the shake amount of the optical device; And a lid opening / closing detection unit that detects an open / closed state of a lid member that protects a battery housing unit that houses the power battery, and the lid opening / closing detection unit detects opening of the lid member. And the control means drives the correction optical system to a reference position where the optical axis of the correction optical system coincides with the optical axes of other optical systems forming the imaging optical system of the optical device. Anti-vibration Optical equipment with processing functions. 2. The power supply from the power supply battery is stopped after the opening / closing of the lid member is detected by the lid opening / closing detecting means and the correction optical system is driven to the reference position. An optical device having the image stabilization function according to claim 1. 3. A capacitor connected to the power supply battery, wherein opening and closing of the lid member and start and stop of power supply from the power supply battery are configured to interlock with each other, and the lid member is closed. When the power supply from the power supply battery is started, the capacitor is charged, and when the lid member is opened, the power supply to the optical device is switched from the power supply battery to the capacitor, and the reference of the correction optical system is set. The optical apparatus having the image stabilization function according to claim 1, wherein the driving to the position is performed based on the power supply from the capacitor. 4. A prevention optical system having a correction optical system for correcting an image blur due to a shake of an optical device, and driving the correction optical system so as to cancel the shake of the optical device. A position where the optical axis of the correction optical system coincides with the optical axes of other optical systems that form the imaging optical system of the optical device when a power is supplied to the optical device that has a shake processing function. An optical device with an anti-vibration function that can be positioned at any time.