JP3197995B2 - Optical equipment with camera shake correction function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to optical equipment (such as binoculars).
1. Field of the Invention The present invention relates to an optical apparatus having a camera shake correction function for optically correcting a camera shake generated when a camera is used.

[0002]

2. Description of the Related Art Conventionally, as a camera shake correction device used for optical equipment such as binoculars, an inertial force is used for a shake detection system, and the camera is coupled to an optical lens which is a shake correction system by a special support mechanism called a cardan shaft. Using a product manufactured by Carl Zeiss Co., Ltd., which passively attenuates the vibration, and a free gyro that rotates at high speed for the vibration detection system, this free gyro and the two right and left prisms, which are the vibration correction system, are integrally connected. There is a product manufactured by Fuji Photo Optical Co., Ltd., which stabilizes shaking through an outer gimbal frame.

As an optical image stabilizer other than binoculars, a small acceleration sensor is used for a shake detection system, and a variable apex prism, which is a kind of liquid prism, is used for a shake correction system. The variable apex prism (hereinafter referred to as VAP) is deformed in accordance with the calculated correction amount, and the optical axis is forcibly refracted in the direction opposite to the fluctuation, thereby stabilizing the imaging point. The shake correction device used for this purpose has been put to practical use in video cameras.

FIG. 4 shows a basic control configuration diagram of an image stabilizing apparatus using a variable apex angle prism (hereinafter referred to as VAP) incorporated in the conventional video camera. In FIG. 4, reference numeral 101a denotes a vertical vibration of the entire apparatus, and 101b denotes a small vibrating gyroscope or the like for detecting the lateral vibration of the entire apparatus, which is disposed, for example, around an imaging optical system. 102a, 10
2b is the pitch detection signal 101a, the roll detection signal 1
This is a filter for cutting out only the frequency band generated by camera shake among the frequency components of 01b. Numeral 103 denotes arithmetic means for detecting a frequency from the pitch detection signal 101a and the roll detection signal 101b passing through the filters 102a and 102b, and deriving a shake correction amount suitable for the state, for example, a microcomputer. ). Numeral 104 denotes a VAP serving as a shake correcting means, and as shown in FIG.
And glass plates 202a and 202b and bellows 203a and 203b for enclosing them.

[0005] Reference numeral 105a denotes position detection means for detecting the vertical movement of the VAP 104, and reference numeral 105b denotes position detection means for detecting the horizontal movement of the VAP 104. For example, a PSD sensor or the like is used. Reference numeral 106a denotes a pitch correction comparator for comparing the vertical position detection signal 105a of the VAP 104 with the pitch correction signal from the calculating means 103.
Is a roll compensation comparator, which is composed of an operational amplifier.
107a and 107b are driving means including a driving circuit and an actuator such as an electromagnetic coil.
The VAP 105 is moved based on the shake correction outputs a and b to control the optical axis imaging point for the shake to be kept constant.

FIG. 6 shows a state in which the VAP 104 is incorporated in a lens barrel.
02 indicates an electromagnetic coil, and 303 indicates a front protective glass.

[0007]

As described above, the hand-shake correction device used in conventional binoculars requires complicated and large-scale mechanical parts such as a cardan shaft and a gimbal frame as a shake correction means. The image stabilizing device itself is expensive and difficult to miniaturize. In addition, a camera shake correction device using a VAP has not been put to practical use except for a video camera.

An object of the present invention is to use and apply a mass-produced and relatively inexpensive VAP mounted on a video camera to apply a cheap and high-performance image stabilization apparatus to other optical devices such as binoculars. Is to be able to be mounted.

[0009]

In order to achieve the above object, an optical apparatus having a camera shake correction function according to the present invention is characterized in that, in claim 1, first and second optical axes having first and second optical axes, respectively.
A second optical system, camera shake detection means for detecting camera shake,
Each position of the first, the second camera shake correction means, said first, second camera shake correction means for each correcting camera shake of the first, second optical axis on the basis of the output of said vibration detection means in an optical apparatus having a first, second position detecting means for detecting said first compares the output of the second position detecting means, the comparison result on the basis of the first, second shake correction
The first and second hands so that the displacement amounts of the means are substantially equal.
An optical apparatus having a camera shake correction function characterized by controlling a shake correction unit .
First and second optical systems each having a second optical axis;
Detecting means for detecting camera shake, and output from the camera shake detecting means.
Correction of camera shake of the first and second optical axes based on force
First and second image stabilizing means for performing
First and second positions for respectively detecting the position of the camera shake correction means
An optical device having a detecting means,
The outputs of the first and second hand shakes are compared.
When there is a difference between the displacement amounts of the displacement correction means, the first and second
Of the camera shake correction means, the camera shake correction of the larger displacement amount
Of the camera shake correction means with the smaller displacement amount
The first and second hand-shake correction hands to match the displacement amount
Has a camera shake correction function characterized by controlling the steps
An optical device , the first and second optical axes according to claim 3,
First and second optical systems each having
A camera shake detecting means, based on an output of the camera shake detecting means;
The first and second optical axes respectively correcting the camera shake of the first and second optical axes.
Second camera shake correction means, and the first and second camera shake corrections
First and second position detecting means for respectively detecting the position of the means;
Wherein the first and second position detection are performed.
Comparing the outputs of the first and second image stabilizing means.
When there is a difference between the displacement amounts of the first and second camera shakes,
Of the means, the displacement of the camera shake correction means with the larger displacement amount
To the amount of displacement of the camera shake correction means with the smaller displacement.
Set the first and second camera shake correction means to the maximum
The first and second camera shake correction means even when driven to the driving amount.
If the displacements do not match, the camera shake of the smaller displacement
To the amount of displacement of the correction means, the camera shake correction of the larger of the strange position amount
The first and second camera shakes to make the displacement amounts of the means coincide with each other.
A camera shake correction function characterized by controlling the correction means
5. The optical device according to claim 4, wherein:
The second camera shake correction means is a variable vertex angle prism.
The image stabilization according to claim 1 or 2, wherein the image stabilization is performed.
An optical device having a function, wherein the optical device according to claim 5,
The optical device is a pair of binoculars.
4. An optical device having a camera shake correction function according to any one of 4.
Equipment.

[0010]

According to the present invention, a plurality of image blur correcting means (for example, a plurality of VAPs) are provided in accordance with the detection output of the image blur detecting means.
Etc.) simultaneously and independently, but the respective image blur correction means perform the same image blur correction, so that the image blur correction device can be applied to optical equipment such as binoculars that requires a plurality of optical systems. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention in binoculars will be described below with reference to the drawings. FIG. 1 is a basic control configuration diagram of the present embodiment.

Reference numeral 401a denotes the pitch of the entire binoculars;
Reference character b denotes a pitch detection unit and a roll detection unit each including a small vibration gyro utilizing the Coriolis principle of detecting the horizontal movement of the binoculars. The small vibration gyro is also a kind of acceleration sensor.

Numerals 402a and 402b are generated by hand shake of 0.5 Hz to 20 Hz among frequency components of output signals of pitch and roll detection means 401a and 401b which are small vibration gyros for detecting pitch and roll. This is a filter that cuts out only the frequency band. Reference numeral 403 denotes a microcomputer serving as a means for calculating a shake correction amount.
The vibration detection signal obtained through 2a and 402b is
An angular velocity signal is converted into an angular displacement signal by taking in and performing an integration operation by an A / D converter inside 03. The frequency of the converted shake detection signal is detected, and a shake correction amount is calculated according to the state at that time. The calculated shake correction amount is calculated by the microcomputer 403.
Output via an internal D / A converter.

Reference numeral 404a designates a left eye and 404b designates a VAP which serves as a right eye shake correcting means, and its configuration is as shown in FIG. Reference numeral 405a denotes a vertical movement of the left-eye VAP 404a, 405b a horizontal movement of the left-eye VAP 404a, 405c a vertical movement of the right-eye VAP 404b, and 405d a position detection means for detecting a horizontal movement of the right-eye VAP 404b. , An infrared light emitting diode and a PSD sensor.

Reference numeral 406a denotes a signal from the vertical position detecting means 405a of the VAP 404a and the microcomputer 4 which is an arithmetic means.
406b is the VAP
The signal 406a from the horizontal position detecting means 405b and the left eye roll correction signal from the microcomputer 403 as the calculating means are used as the signal 406c for the vertical position detecting means 4 of the VAP 404b.
406d is a signal from the microcomputer 403, which is a calculating means, and a VAP404
b from the horizontal position detecting means 405d and the right eye roll correction signal from the microcomputer 403 as the calculating means.
Each of the shake correction comparators for comparison is constituted by an operational amplifier.

Reference numeral 407a denotes an oscillation correction comparator 406a;
07b is a shake correction comparator 406b, 407c is a shake correction comparator 406c, and 407d is a shake correction comparator 406.
d, respectively, receiving the shake correction signal,
Drive means for moving P404a and 404b, each consisting of a drive circuit and an electromagnetic coil as an actuator.

Next, referring to the flowchart of FIG.
A state in which the AP is independently controlled will be described. Hereinafter, each step is abbreviated as S.

Vibrating gyroscope 401 serving as a pitching detecting means
a and the vibration detection angular velocity signals of the vibration gyro 401b, which is the roll vibration detection means, pass through the filters 402a and 402b, respectively, and take in only the necessary vibration frequency into the A / D converter (S501). The swing detection angular velocity signal digitized by the A / D converter is integrated (digitally integrated) and converted into a pitch angle displacement signal δp and a roll angle displacement signal δy (S502). Each of the signals converted into the shake detection angular displacement signals δp and δy is subjected to frequency determination and then multiplied by a displacement constant k to obtain a pitch correction amount ε.
p and the roll correction amount εy are calculated (S503). The calculated roll correction εp is calculated by comparing the comparator 406a with the comparator 4
06c is output as a left-eye pitch correction signal εpl and a right-eye pitch correction signal εpr, respectively, and the calculated roll correction amount εy is sent to a comparator 406b and a comparator 406d, respectively, for a left-eye roll correction signal εyl and a right-eye roll. Correction signal εy
Output as r. At this time, the shake correction amounts for the left and right eyes are equal (εpl = εpr, εyl = εyr) (S50
4). Then, the comparators 406a, 406b, 406c,
Reference numeral 406d designates the shake correction signals εpl, εpr, εyl, εyr output from the microcomputer 403 and the output signals γpl, γpr, γyl, γyr from the VAP position detecting means 405a, 405b, 405c, 405d as comparison output values. , And VAPs 404a and 404b, which are vibration correcting means, are driven via electromagnetic coils that are driving means for the VAP. The driving amount D at this time is calculated by the comparator 406.
a, 406b, 406c, 406d, the left-eye VAP vertical drive amount Dpl and the right-eye VAP vertical drive amount Dp
r, the left-eye VAP horizontal drive amount Dyl, and the right-eye VAP horizontal drive amount Dyr (S505).

Next, the left and right VAPs 404a, 404b
Of the position detection signal γp
The microcomputer reads l, γpr, γyl, and γyr, and makes a determination (γpl = γpr ?, γyl = γyr?) (S
506). Then, the left and right vertical position signals γpl and γp
r, if the left and right horizontal signal signals γyl and γyr are equal, the shake correction control is continued (S507), and the left and right vertical position signals γpl and γpr, the left and right horizontal position signals, γyl and γyr are equal. Ba (γpl
≠ γpr or γyl ≠ γyr), the calculation fluctuation correction amount ε
One side (εpl or εpr, εyl or εyr) of p and εy is increased until they are equal. Left and right position signals γp, γy
May not be equal because the two left and right VAP4
This is because there is variation in the load characteristics of the load characteristics 04a and 404b (S508 → S509 → S506 → S507).

Further, even if the operation fluctuation correction amounts εp and εy are increased to the maximum drive amount Dmax, the left and right position signals γp and
When γy does not match (γpl ≠ γpr, or γyl
(≠ γyr), the remaining vibration correction remains, and the displacement constant k is changed so as to match the smaller of the position signals γp and γy as compared with one, so that the movements of the left and right VAPs 404a and 404b are matched (S510 → S506 → S50
7). As described above, VA is used as the two right and left shake correcting means.
When P is used, the shake correction control is performed with priority given to balancing the left and right VAPs.

Next, FIG. 3 shows an example in which the shake correcting device is arranged on the binoculars. 601 is a front objective lens group including a focus lens, 602 is a VAP, 603 is a rear objective lens group formed of a prism, 604 is an eyepiece lens group, 605 is a secondary power supply for controlling and driving a camera shake correction device, 606
Is a control control board. It should be noted that the angular velocity sensor may use another method or two-axis detection. Other corrections may be made.

In the above-described embodiment, an example is described in which the VAP is used as the shake correcting means. However, the present invention is not limited to this. For example, the light beam is deflected by moving the optical member in the direction orthogonal to the optical axis. Other correction means such as a correction means for performing the correction may be used.

Although the vibration gyro is used as the means for detecting the shaking, other angular accelerometers may be used, and the present invention is not limited to the angular accelerometer. For example, other types of detection means can be applied.

Further, in the embodiment, one means for detecting each of the vertical and horizontal shaking is used, but three or more detecting means may be used. It may be constituted by only one detecting means for detecting shaking, or a sensor (for example, a vibration gyro for two-axis detection) which detects shaking in a plurality of directions with one detecting means. Good.

[0025]

As described above, according to the present invention, an optical image stabilizer using, for example, a VAP or the like can be applied to an optical apparatus having a plurality of optical systems such as binoculars, and a high-performance and inexpensive image stabilizer can be obtained. The correction device can be provided for a wider range of products.

[Brief description of the drawings]

FIG. 1 is a basic block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing an embodiment of the present invention.

FIG. 3 is a layout diagram showing an embodiment of the present invention.

FIG. 4 is a basic block diagram of a camera shake correction device in a conventional video camera.

FIG. 5 is a schematic view of a variable apex angle prism.

FIG. 6 shows a variable apex angle prism incorporated in a conventional video camera lens barrel.

[Explanation of symbols]

401a, 401b Fluctuation detecting means 402a, 402b Filter 403 Microcomputer 404a, 404b VAP (variable vertex angle prism) 405a, 405b, 405c, 405d Position detecting means 406a, 406b, 406c, 406d Correction comparators 407a, 407b, 407c, 407d Driving means

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsuyoshi Morito 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Hidekkei Sato 3-30-2 Shimomaruko, Ota-ku, Tokyo (56) References JP-A-2-284113 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 27/64 G02B 23/00 G03B 5/00

Claims (5)

(57) [Claims] 1. A first and a second optical system having first and second optical axes, a camera shake detecting means for detecting a camera shake, and the first and second optical systems based on an output of the camera shake detecting means. optical having the first respectively correct the shake of the optical axis, and a second camera shake correction means, the first, and first and second position detecting means for detecting each position of the second camera shake correction means In the apparatus, the outputs of the first and second position detecting means are compared, and the ratio is calculated.
Displacement of the first and second camera shake correction means based on the comparison result
The first such amount is substantially equal, an optical apparatus having a camera shake correction function and controls the second camera shake correction means. 2. A first and a second optical axis having first and second optical axes, respectively.
(2) an optical system, camera shake detecting means for detecting camera shake,
The first and second light sources are output based on the output of the hand-shake detecting means.
First and second image stabilizing means for correcting each axis image stabilization
And the positions of the first and second image stabilizers are detected.
Optical equipment having first and second position detecting means
And Comparing the outputs of the first and second position detecting means,
1. If there is a difference in the amount of displacement of the second camera shake correction means,
Of the first and second camera shake correction means, the displacement amount is large.
The hand with the smaller displacement is the displacement of the other camera shake correction means.
In order to make the displacement amounts of the shake correcting means coincide with each other,
Image stabilizer characterized by controlling a camera shake correcting means of the camera
Optical equipment that has a positive function. 3. The first and second optical axes respectively having first and second optical axes.
(2) an optical system, camera shake detecting means for detecting camera shake,
The first and second light sources are output based on the output of the hand-shake detecting means.
First and second image stabilizing means for correcting each axis image stabilization
And the positions of the first and second image stabilizers are detected.
Optical equipment having first and second position detecting means
And Comparing the outputs of the first and second position detecting means,
1. If there is a difference in the amount of displacement of the second camera shake correction means,
Of the first and second camera shake correction means, the displacement amount is large.
To the amount of displacement of the camera shake correction means
In order to make the displacement amounts of the camera shake correction means coincide with each other,
Even if the second camera shake correction means is driven to the maximum drive amount,
1. When the displacement amounts of the second camera shake correction means do not match,
Displacement amount The displacement of the smaller image stabilizer is
The displacement of the camera shake correction means with the larger
Controlling the first and second image stabilizing means.
An optical device that has a hand-shake correction function. Wherein said first, according to claim 1 or 2, the second camera shake correction means, characterized in that a variable angle prism
Or an optical device having a camera shake correction function according to 3 . Wherein said optical apparatus is an optical apparatus having the image stabilization function as claimed in any one of claims 1 to 4, characterized in that a binocular.