JP3041152B2 - Image stabilizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monocular or binocular lens which is vibrated, the angle of emergence of a light beam from an object to be observed with respect to the optical axis of these optical devices fluctuates, and an optical image is observed blurred. The present invention relates to an image stabilizing device provided in the optical device for preventing the image stabilization.

[0002]

2. Description of the Related Art When an optical device, such as a monocular or binocular, for optical observation is held and operated by hand, the optical device is particularly brought into an aircraft or a vehicle. When used, vibrations and fluctuations of an aircraft, a vehicle, and the like are transmitted to the optical device, and the exit angle of the light beam from the observation object with respect to the optical axis fluctuates, often deteriorating the observed optical image. The vibration transmitted to the optical device is
Even if the width is small, see through monoculars or binoculars.
Because the field is small and the observation object is enlarged and observed
In addition, the fluctuation angle with respect to the optical axis is also enlarged. Hence the ratio
Even when swinging with a relatively small angular fluctuation speed, the observation object
Moves rapidly in the field of view or the angle of change is large
Has the disadvantage of being out of sight. Ma
In addition, when swinging with a relatively large angular speed change,
The image of the observed object by the magnification of the optical device even if the moving angle is small
The angle fluctuation speed of
As a result, an inconvenience of image deterioration occurs.

Hitherto, various optical devices have been proposed for stabilizing an image in order to prevent the angle of emergence of a light beam with respect to the optical axis from fluctuating due to vibrations and fluctuations transmitted to the optical device, thereby preventing the observed image from deteriorating. Have been.

[0004] For example, Japanese Patent Publication No. 57-37852 discloses a binocular provided with a vibration isolating means utilizing a rotary inertial body (gyromotor) in order to correct the blur of an observed image in the binocular.

That is, this technique arranges an erect prism on an optical axis between an objective lens and an eyepiece of binoculars, and places the erect prism on a single gimbal suspension means to which a rotating inertia body is attached. Even when the binoculars are worn, the erecting prism is held in substantially the same posture even when the binoculars vibrate due to camera shake or the like, so that the observation image of the binoculars is prevented from blurring.

The prior art utilizing such a rotating inertial body and a single gimbal suspension means can stabilize an image with high accuracy, but obtain a large inertial force in a small space to achieve high speed.
Rotating body is required, and vibration generated by the rotating body itself
Need to be high precision because
You. Problems for the requirement of small size, high speed and high precision
Is the price, life, and inertia required from power-on.
This is disadvantageous in the time required to obtain it. Also binocular
As the magnification and resolution of the mirror are increased,
Increasing the effective diameter increases the size of the erect prism.
The above problems are further exacerbated due to the need for large inertial forces.
In addition to this, the power consumption also increases accordingly.

[0007] Therefore, the binoculars themselves become larger and heavier, and a battery with a large capacity is required. Therefore, the binoculars are not very suitable for use in observing scenery or the like easily or for a long time. Furthermore, the cost of the binoculars is high because the rotary inertia body is expensive.

When an optical device such as monocular or binoculars is held by hand, or when the optical device is used while being carried in a vehicle or the like, the vertical component of the vibration applied to the optical device is very large. Since the vibration component in the horizontal direction is smaller than the vibration component in the vertical direction, it is often practically sufficient if only the image blur prevention function in the vertical direction is built in. In this case, if an attempt is made to stabilize the image only in the vertical direction, the rotating inertial body causes precession, and it is impossible to prevent image blur in the vertical direction.

The present invention has been made in view of such circumstances, and an image stabilizing apparatus which is capable of reducing the weight and size of the apparatus, reducing power consumption, and being highly accurate and inexpensive. It is intended to provide.

It is a further object of the present invention to provide an image stabilizing apparatus capable of preventing only an image blur caused by a vertical vibration of an optical device.

[0011]

SUMMARY OF THE INVENTION An image stabilizing apparatus according to the present invention is an optical apparatus such as a monocular or a binocular which is provided with an erect prism disposed on an optical axis between an objective lens and an eyepiece in a predetermined direction. The gimbal suspension means is mounted on the rotatable gimbal suspension means, and rotation angle information of the gimbal suspension means with respect to the inertial space accompanying the shake of the optical device is detected by the angle information detection means arranged on the gimbal suspension means. In order to correct image blur based on the detected value, the gimbal suspension means is rotated so that the erect prism is maintained in an initial posture.

That is, the first image stabilizing device of the present invention has a monocular optical system or a binocular optical system in which an erect prism is disposed between an objective lens and an eyepiece, and the objective lens of these optical systems And an optical device having the eyepiece fixed in a case, a gimbal suspension unit having a rotation axis extending in the left-right direction of the optical device, and the erecting prism being rotatably mounted on the case, Based on the angle information detected by the gimbal suspension means, the rotation angle information of the gimbal suspension means due to the vertical shake of the optical device, and the angle information detected by the angle information detection means, A rotation driving means for rotating a rotation axis of the gimbal suspension means so as to hold the erect prism in an initial position in order to correct image blur on an image forming surface of the optical device; With bets, the rotation shaft of said gimbal suspension means comprising the angle information detecting means includes an optical distance from the objective lens to the light incident surface of the erecting prism,
It is set at a position corresponding to a substantially middle point of a sum of a mechanical distance between a light incident surface and a light exit surface of the erect prism and an optical distance from the light exit surface of the erect prism to the eyepiece. It is characterized by the following.

A second image stabilizing device of the present invention has a monocular optical system or a binocular optical system in which an erect prism is arranged between an objective lens and an eyepiece, and the objective lens of these optical systems is provided. And an optical device having an eyepiece fixed in a case, the optical device having two rotation axes extending in the left-right direction and the up-down direction of the optical device, and the erecting prism is rotatably mounted on the case. Two gimbal suspension means fixed to the gimbal suspension means for detecting rotation angle information of the gimbal suspension means due to vertical and horizontal fluctuations of the optical device; Based on the angle information detected by the two angle information detectors, the erection prism is held in an initial position so as to correct image blur on the imaging surface of the optical device. Rotation drive means for rotating two rotation axes of the valley suspension means, and a rotation axis of the gimbal suspension means provided with the angle information detection means is a light incident surface of the erecting prism from the objective lens. , The mechanical distance between the light incident surface and the light exit surface of the erecting prism, and the approximate midpoint of the sum of the optical distances from the light exit surface of the erecting prism to the eyepiece. It is characterized by being set at a position.

The angle information detecting means may be any sensor capable of detecting angle information such as an angle, an angular velocity or an angular acceleration.

Further, when an angular velocity sensor is used as the angle information detecting means, the angular velocity sensor may be constituted by a piezoelectric vibrating gyroscope using a regular triangular prism vibrator and a piezoelectric ceramic.

Further, the image blur correction is performed by the angle information detecting means comprising an angle sensor for detecting a rotational angle amount and an angular velocity sensor for detecting a rotational angular velocity amount, and multiplying an output from the angle sensor by a predetermined coefficient. And a control system having a double feedback loop configured to feed back the integrated signal of the output from the angular velocity sensor to the gimbal suspension means while feeding back to the gimbal suspension means. It is possible.

[0017]

According to the above construction, the erecting prism is formed by using the angle information detecting means and the rotation driving means for rotating the gimbal suspending means based on the angle information instead of stopping the gimbal suspending means by using the rotary inertia body. The image stabilization device is controlled so as to maintain the initial posture. Means necessary for these controls are lighter, smaller, less expensive, and consume less power than the above-mentioned rotary inertia body. In addition, it is possible to reduce the weight and size of the entire optical device such as monoculars and binoculars, and it is also possible to reduce the power consumption and the manufacturing cost. Further, the rotation axis of the gimbal suspension means is positioned at a substantially middle point of an optical path from the objective lens to the eyepiece via the erect prism, and the gimbal suspension means is fixedly provided with angle information detection means. Therefore, a stable emission angle of the optical axis can be obtained even when vibration is applied to the optical system. That is, when the lens barrel is tilted by θ, the relative angular position between the erecting prism and the lens barrel is also tilted by θ (anti-vibration sensitivity 1), so that image stabilization can be performed. As a result, a sharp image can be obtained, and even if vibration is applied to the optical system, stabilization on the image plane can be achieved quickly and accurately.

In the first stabilizing device of the present invention,
Although only the vertical image blur of the optical device is corrected, if the control system as described above is used, the precession does not occur unlike the case of using the rotating inertial body, so that the optical device can be accurately corrected. It is possible to correct only vertical image blur.

Further, when a piezoelectric vibrating gyro sensor combining a regular triangular prism vibrator and a piezoelectric ceramic is used as the angle information detecting means, the size of the sensor is extremely small, light and inexpensive. It is possible to further promote reduction in size, weight, and manufacturing cost.

Further, if the information amount output from the angle sensor and the angular velocity sensor for the correction of the image blur is fed back to the gimbal suspension means to perform double feedback control, the accuracy and stability of the correction can be improved. Is improved.

[0021]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a state in which an image stabilizing device according to an embodiment of the present invention is incorporated in binoculars, and FIG. 2 is a block diagram for explaining the inside of the image stabilizing device. As shown in FIG. 1, the binoculars incorporating the image stabilizing device 1 of the present embodiment include a pair of objective lens systems 1a and 1b, a pair of eyepiece systems 2a and 2b, and a pair of erect prisms 3a and 3a. 3b
The objective lens 1a, the eyepiece lens 2a, and the erecting prism 3a constitute a first telescope system 10a, and the objective lens 1b,
The eyepiece 2b and the erect prism 3b are likewise a second telescope system.
10b, and a pair of the first and second telescope systems 10a and 10b constitute a binocular system.

The pair of objective lens systems 1a and 1b and the eyepiece lens systems 2a and 2b of the present optical device constituting the binocular system are fixed to the case of the present optical device.
Reference numerals a and 3b are rotatably mounted on the case via a gimbal suspension device 7 having a rotation shaft 6 extending in the left-right direction of the apparatus (the arrangement direction of the objective lens systems 1a and 1b).

In FIG. 1, the gimbal suspension device 7 on which the erecting prisms 3a, 3b are mounted is fixed to the case. Therefore, the erecting prisms 3a, 3b mounted on the gimbal suspension device 7 are mounted on the case. In the fixed state, the present optical device has the configuration of a normal binocular system, but the optical axes 4a and 4b of the telescope optical systems 10a and 10b at this time are referred to as main optical axes of the present optical device. .

The objective lens systems 1a and 1b, the eyepiece lens systems 2a and 2b, the erect prisms 3a and 3b, the gimbal suspension device 7
The appropriate arrangement positions of the rotating shaft 6 and the like are described in detail in a known document (for example, Japanese Patent Publication No. 57-37852), and thus are omitted here.

Further, as shown in FIG.
In the figure, an angular velocity sensor 8 is fixed to the gimbal suspension device 7. The angular velocity sensor 8 when accompanied no gimbal suspension device 7 to shake in the vertical direction of the case (arrow A direction) is rotated in the arrow B direction, a sensor for detecting the rotational angular velocity omega _1.

A gimbal suspension device 7 is provided at one end of the rotating shaft 6 so that the erecting prisms 3a and 3b always return to the initial posture against the shake of the case based on the detection value from the angular velocity sensor 8. A rotation drive motor 5 for rotating the moving shaft 6 is mounted. The other end of the rotating shaft 6 is rotated by the rotation of the rotating shaft 6 to perform position feedback control in addition to the speed feedback control based on the detected angular velocity. A potentiometer 9 for detecting the angle θ ₁ is attached.

Further, as shown in FIG. 2, the apparatus 1 of this embodiment includes amplifiers 11a and 11a for amplifying the angular velocity signal from the angular velocity sensor 8 and the angular signal from the potentiometer 9, respectively.
b, a CPU 12 for calculating a drive amount of the rotary drive motor 5 based on the angular velocity signal and the angle signal so as to return the erect prisms 3a and 3b to the original posture, and outputting a control signal based on the calculation; A motor drive circuit 13 for driving the rotary drive motor 5 by amplifying the control signal from the CPU 12 is provided.

According to the apparatus of this embodiment constructed as described above, the erecting prisms 3a and 3b can always be returned to the initial posture against the vertical movement of the case. For this reason, it is possible to stably maintain the emission angle of the light beam with respect to the optical axis against blurring, and to prevent the observed image from deteriorating.

FIG. 3 shows the optical device shown in FIG.
That is, the principle of keeping the optical axis stable with respect to the vibration component in the direction of arrow A in FIG. 1 is described, and is a cross-sectional view taken along line XX of FIG. First, the objective lens system 31, the erecting prism 34 capable of taking the incident optical axis and the emitting optical axis on the same straight line, and the eyepiece lens system 33, the optical axis of which is on the same optical axis 32, A prism 34 is arranged between the objective lens system 31 and the eyepiece lens system 33. At this time, the optical axis 32
Light rays incident on the objective lens system 31 in parallel to the light exit from the eyepiece lens system 33 in parallel with the optical axis 32 and enter the eye 37. Here, a rotation axis for compensating a vertical vibration component of the gimbal suspension device 7 on which the erecting prism 34 is mounted, that is, FIG.
Assuming that the position of the rotating shaft 6 at the point K is a point K and the optical axis 32 is inclined relative to the optical axis 32 'by the angle と し て about this point as the center of rotation, the objective lens system 31 moves to the objective lens system 31'. The eyepiece system 33 goes to the eyepiece system 33 ', so the point g at the center of the objective lens system 31 goes to the point g'.
The point moves to the point h ', but the erecting prism 34 is maintained in the substantially original position because it is rotatably mounted on the case so as to be returned to the original position by the control system.

Accordingly, the light ray 35 which is parallel to the original optical axis 32 and passes through the center g 'of the inclined objective lens system 31' is parallel to the optical axis 32 even after passing through the objective lens system 31 '. The light enters the erecting prism 34 at point n on the incident surface, that is, at a point mn apart from point m on the optical axis 32. Due to the nature of the erecting prism, this light beam is shifted from the exit surface of the erecting prism 34 by a distance of nm = op below the O point on the optical axis 32 from a point p, which is separated by nm = op.
Since the light beam 32 ′ is emitted parallel to the optical axis 32, the light beam 32 ′ incident on the objective lens 31 ′ inclined parallel to the optical axis 32 is imaged at a point S on the optical axis 36. Therefore, if the movement amount hh 'of the center h' point on the eyepiece lens system 33 'after the optical axis 32 is inclined by the angle ψ from the original center h point is equal to op, that is, hh'
= Op, op = mn = gg ', so hh' = gg '
And the focal position of the eyepiece system 33 is Q point, and the eyepiece 3
The focal position of 3 'is defined as point R, and RS = fe'.theta. (Fe'
Is the focal length of the eyepiece lens system), the eyepiece lens system 3 can be used even if the telescope system of the apparatus 1 of the present embodiment is tilted by ψ.
The ray 36 'emitted from 3' is parallel to the optical axis 32 and becomes
Therefore, the emission angle of the optical axis by the telescope system does not change, and a stable emission angle of the optical axis is obtained even when vibrations are applied to the telescope system, and a sharp image is observed.

In order to satisfy the above condition, when the optical axis 32 is tilted, the objective lens system 31 and the eyepiece lens system 33 are tilted by the same amount, so that gk = kh in FIG. The gimbal is located at the midpoint of the sum of the optical distance to the entrance surface of the prism 34, the mechanical distance between the entrance surface and the exit surface of the erect prism 34, and the optical distance from the exit surface of the erect prism 34 to the eyepiece 33. What is necessary is just to provide the rotation shaft 6 of the suspension device 7. Also, as is apparent from FIG. 3, the erecting prism 34 has the relationship of gg '= hh' even if it is located at an arbitrary position between the objective lens system and the eyepiece lens system. And the eyepiece system can be placed at the most convenient place mechanically. The above is exactly the same for the telescope systems 10a and 10b in FIG.
It is clear that one pivot axis of the common gimbal suspension 7 is common as shown at 6.

The erecting prisms 3a and 3b include Schmidt's erecting prism, Abbe's erecting prism, Bauern fend's erecting prism, and Polo's erecting prism. FIG. 4 shows a Schmidt erect prism used in the apparatus 1 of the present embodiment. The Schmidt erect prism includes a prism 23 and a prism 24 as shown in the figure, and a part 25 of the prism 24 is a roof reflection surface. Thus, in the erect prism, there is a position of the incident optical axis where the incident optical axis 21 and the exit optical axis 22 can be on the same straight line as shown in the figure.
In such an erect prism capable of taking the incident optical axis 21 and the outgoing optical axis 22 on the same straight line, as shown in FIG. After passing through the erecting prism, the light ray 21 ′ is separated from the emission optical axis 22 by a distance h below the output optical axis 22 in FIG.
It has the property of being parallel to.

Next, the angular velocity sensor 9 will be described in detail with reference to FIG.

The angular velocity sensor 9 includes a regular triangular prism vibrator 9a
And a piezoelectric vibrating gyro sensor utilizing Coriolis force, comprising three piezoelectric ceramics 51a, 51b, and 52,
The piezoelectric ceramics 51a, b for detection are provided on two of the three side surfaces of the regular triangular prism vibrator 9a, and the piezoelectric ceramics 52 for feedback are provided on the other side surface.

Two detection signals having different values are outputted from the two detection piezoelectric ceramics 51a and 51b in accordance with the vibration, and an angular velocity is obtained by calculating a difference between these two detection signals.

The feedback piezoelectric ceramic 52 is used for correcting the phase of the detection signal.

Since the angular velocity sensor 9 has a simple structure and is very small, the image stabilizing device 1 itself can have a simple structure and a small size.

Further, since the accuracy is high at a high S / N ratio, the angular velocity control can be performed with high accuracy.

Next, a control system of the apparatus 1 of the embodiment will be described with reference to a block diagram shown in FIG.

This control system comprises a double feedback loop of a velocity (angular velocity) feedback loop and a position (angle) feedback loop.

First, the velocity feedback loop detects the angular velocity ω of the gimbal suspension device 66 by the angular velocity sensor 61,
This detection value is negatively fed back to the motor drive system 64. The motor drive system 64 generates a rotational torque on the motor 65 based on the negatively feedback detected value, compensates for disturbance torque received from the gimbal shaft, and stabilizes the gimbal spatially.

In the position feedback loop, the rotation angle θ of the gimbal suspension device 66 is detected by the potentiometer 68, and the detected value is compared with a reference value (0) indicating the visual axis midpoint in the comparison operation unit 69. Is input to the motor drive system 64 via the compensation circuit 62. This prevents the gimbal from flowing due to drift or the like and being displaced to the end of the movable range.

The signal input to the motor drive system 64 is a difference value between the output signal from the compensation circuit 62 and the output signal from the angular velocity sensor 61, which is calculated in the comparison calculation section 63. An integration means 67 for calculating the angle θ by integrating the angular velocity ω is provided at a stage subsequent to 66.

The gimbal suspension device 7 of the device 1 of the present embodiment is returned to the original position by the control system having the double feedback loop as described above, so that the image blur can be corrected with high accuracy and stability. Can be performed.

Next, an embodiment 101 different from the embodiment 1 shown in FIG. 1 will be described with reference to FIG.

Note that members having the same functions as those shown in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and detailed descriptions thereof will be omitted. In addition, the vertical direction of the device 101 in the description indicates the direction of arrow A in the figure, and the horizontal direction of the device 101 indicates the direction of the arrow C in the figure.

That is, the apparatus 1 of the embodiment shown in FIG. 1 corrects image blur according to the vertical movement (direction of the arrow A) of the apparatus 1, while the apparatus 101 of the embodiment shown in FIG. The image blur is corrected in accordance with the vertical (arrow A) and horizontal (arrow C) directions.

In the apparatus 101 of this embodiment, the inner gimbal suspension member 107 is pivotally supported by the outer gimbal suspension member 7a, and the gimbal suspension device has a double inner and outer structure.
The outer gimbal suspension member 7a is rotated by the rotation shaft 6 extending in the left-right direction of the device 101 to correct image blur in the vertical direction, while the inner gimbal suspension member 107 is moved
The first rotating shaft 106 extends in the vertical direction so as to correct image blur in the horizontal direction. The erect prisms 3a and 3b
The gimbal suspension member 107 on the inner side is mounted.

Also, the inner gimbal suspension member 107 has
Two angular velocity sensors 8, 108 are fixed. While the angular velocity sensor 8 detects the rotational angular velocity ω ₁ when the outer gimbal suspension member 7 a rotates in the direction of arrow B due to the vertical movement of the case, the angular velocity sensor 108 , gimbal suspension member 107 of the companion not inside the blur of the left and right direction of the case is when rotated in the arrow D direction, a sensor for detecting the rotational angular velocity omega _2.

One end of the rotating shaft 106 is provided with an inner gimbal such that the erect prisms 3a, 3b are always returned to the initial posture against the lateral movement of the case based on the detection value from the angular velocity sensor 8. A rotation drive motor 105 for rotating the rotation shaft 106 of the suspension member 107 is attached. The other end of the rotation shaft 106 is rotated for performing position feedback control in addition to the speed feedback control based on the detected angular velocity. A potentiometer 109 for detecting the rotation angle θ ₂ of the moving shaft 106 is attached.

The detection signals from the angular velocity sensor 108 and the potentiometer 109 are converted into control signals by a control system similar to the control system shown in FIG. 2 or FIG. 6, similarly to the detection signals from the angular velocity sensor 8 and the potentiometer 9. The rotation drive motor 105 is driven by this control signal.

Therefore, in the apparatus 101 of this embodiment, two sets of control systems are required to return the two outer and inner gimbal suspension members 7a and 107 to the original posture, but a common CPU 12 may be used. .

It should be noted that the image stabilizing device of the present invention is not limited to the above-described embodiment, and various other modifications can be made.

For example, in the apparatus of the above embodiment, a sensor for detecting an angle and an angular velocity is used as the angle information detecting means, but an angular acceleration sensor may be used together with or instead of this.

As a sensor for detecting an angle, various angle sensors such as a resolver, a synchro, and a rotary encoder can be used instead of a potentiometer.

Although the apparatus of the above embodiment is configured to be applied to the binoculars 21, the image stabilizing apparatus of the present invention may be configured to be applicable to monocular.

[0058]

According to the image stabilizing device of the present invention, the gimbal suspension device equipped with the erect prism can be returned to the original state by the electric control system using the angle information detecting means, the control circuit system and the rotary drive motor. The system is controlled to return to the attitude, and these systems are lightweight, compact, and inexpensive, and require low power consumption. Therefore, the entire optical device can be reduced in weight and size, and power consumption can be reduced. Cost and manufacturing cost can be reduced.

Further, in the apparatus of the present invention configured as described above, even if only correction for image blur in the vertical direction of the optical device is performed, a conventional rotary inertia body (gyromotor) can be used.
This does not cause the problem that the rotating inertia body causes precession and cannot prevent image blur as in the prior art using Be able to respond to requests. Further, the rotation axis of the gimbal suspension means is positioned at a substantially middle point of an optical path from the objective lens to the eyepiece via the erect prism, and the gimbal suspension means is fixedly provided with angle information detection means. Therefore, a stable emission angle of the optical axis can be obtained even when vibration is applied to the optical system. That is, when the lens barrel is tilted by θ, the relative angular position between the erecting prism and the lens barrel is also tilted by θ (anti-vibration sensitivity 1), so that image stabilization can be performed. As a result, a sharp image can be obtained, and even if vibration is applied to the optical system, stabilization on the image plane can be achieved quickly and accurately. As described above, the image plane is stabilized promptly and accurately in response to the vibration, so that it is particularly effective to apply the present invention to, for example, a monitoring binocular device on a ship.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the inside of binoculars incorporating an image stabilizing device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the image stabilizing device of FIG.

FIG. 3 is a schematic diagram for explaining the principle that the optical axis of the optical device shown in FIG. 1 is stably maintained against vertical shake.

FIG. 4 is a side view for explaining the erect prism shown in FIG. 1;

FIG. 5 is a perspective view showing the angular velocity sensor shown in FIG. 1 in detail;

FIG. 6 is a block diagram showing a control system of the apparatus shown in FIG. 1;

FIG. 7 is a schematic view showing another embodiment apparatus different from the embodiment apparatus shown in FIG. 1;

[Explanation of symbols]

 1,101 Image stabilizer 1a, 1b, 31, 31 'Objective lens (objective lens system) 2a, 2b, 33, 33' Eyepiece lens (eyepiece lens system) 3a, 3b Erect prism 4a, 4b Optical axis 5, 105 Rotation drive motor 6,106 Rotating shaft 7 Gimbal suspension device 7a Outer gimbal suspension member 8,108 Angular velocity sensor 9,109 Potentiometer 10a, 10b Telescope optical system 12 CPU 39a Triangular prism oscillator 51a, 51b Piezoelectric ceramic for detection 52 Piezoelectric ceramic for return 107 Gimbal suspension inside

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03B 5/00

Claims (4)

(57) [Claims] 1. An optical system comprising a monocular optical system or a binocular optical system in which an erecting prism is disposed between an objective lens and an eyepiece lens, wherein the objective lens and the eyepiece lens of these optical systems are fixed in a case. In the apparatus, a gimbal suspension means having a rotation axis extending in the left-right direction of the optical apparatus, the gimbal suspension means for rotatably mounting the erecting prism to the case, and the optical apparatus fixed to the gimbal suspension means Angle information detection means for detecting rotation angle information of the gimbal suspension means with respect to the inertial space due to vertical movement of the gimbal suspension means, based on the angle information detected by the angle information detection means, an image on the image plane of the optical device A rotation driving means for rotating a rotation axis of the gimbal suspension means so as to hold the erect prism in an initial position, in order to correct the shake, and detecting the angle information. Said gimbal suspension with means
The axis of rotation of the means is from the objective lens to the erect prism.
The optical distance to the light incident surface of
Mechanical distance between the surface and the light exit surface and the light emission of the erect prism
At the approximate midpoint of the sum of the optical distances from the exit surface to the eyepiece
An image stabilizing device, which is set at a corresponding position . 2. An optical system comprising a monocular optical system or a binocular optical system in which an erecting prism is arranged between an objective lens and an eyepiece lens, wherein the objective lens and the eyepiece lens of these optical systems are fixed in a case. A gimbal suspension unit having two rotation shafts extending in the left-right direction and the up-down direction of the optical device, the gimbal suspension unit rotatably mounting the erect prism on the case; Two pieces of angle information detecting means for respectively detecting rotation angle information of the gimbal suspension means with respect to the inertial space due to vertical and horizontal movements of the optical device, and angles detected by the two angle information detecting means. In order to correct the image blur on the image forming surface of the optical device based on the information, the two rotations of the gimbal suspension means are performed so as to hold the erect prism in the initial position. Rotating drive means for rotating the dynamic shaft, and the angle information detecting means
The rotation axis of the gimbal suspension means is moved from the objective lens to the
The optical distance to the light entrance surface of the erecting prism and the erecting prism
The mechanical distance between the light entrance surface and the light exit surface of the
Of the optical distance from the light exit surface of the rhythm to the eyepiece
An image stabilizing device, which is set at a position corresponding to a substantially middle point of the sum . 3. The angular vibration sensor according to claim 1, wherein the angle information detecting means detects an amount of rotation angular velocity of the gimbal suspension means accompanying the shake of the optical device, wherein the piezoelectric vibrating gyroscope uses a regular triangular prism vibrator and a piezoelectric ceramic. 3. The image stabilizing device according to claim 1, comprising a sensor. 4. The angle information detecting means comprises an angle sensor for detecting a rotation angle amount and an angular velocity sensor for detecting a rotation angular velocity amount, wherein an output from the angle sensor is multiplied by a predetermined coefficient and fed back to the gimbal suspension means. 3. The image stabilizing apparatus according to claim 1, wherein an integrated signal output from the angular velocity sensor is fed back to the gimbal suspension means.