JPH0743647A - Optical equipment with hand-shake correcting function - Google Patents

Abstract

PURPOSE:To enable the loading of a hand-shake correcting device which is loaded on a video camera on other equipments such as binoculars, etc., too. CONSTITUTION:The equipment is provided with a 1st optical system 404a provided with a 1st optical axis, a 2nd optical system 404b provided with a 2nd optical axis different from the 1st optical axis, 1st correcting means 407a and 407b for correcting the 1st axis of the 1st optical system, 2nd correcting means 407c and 407d for correcting the 2nd optical axis of the 2nd optical system, detecting means 401a and 401b for detecting image blurring and a control means for controlling the drive of both 1st correcting means and 2nd correcting means based on the output of the detecting means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to optical equipment (binoculars, etc.).
The present invention relates to an optical device having a camera shake correction function that optically corrects camera shake that occurs during use.

[0002]

2. Description of the Related Art Conventionally, as a camera shake correction device used in optical equipment such as binoculars, an inertial force is used in a shake detection system, and it is connected to an optical lens which is a shake correction system by a special support mechanism called a cardan axis. By using a product made by Carl Zeiss Co., Ltd. that passively attenuates the shake and a free-gyro that rotates at high speed for the shake detection system, this free gyro and the left and right prisms that are the shake correction system are combined together. , Fuji Photo Optical Co., Ltd., etc., which stabilize the shaking through an outer gimbal frame.

As an optical image stabilization apparatus other than the binoculars, a small acceleration sensor is used for the shake detection system, and a variable vertical angle prism, which is a kind of liquid prism, is used for the shake correction system, and a microcomputer is used from the shake detection information. A shake correction device that calculates a shake correction amount according to the calculated correction amount, deforms the variable apex angle prism, forcibly refracts the optical axis in the direction opposite to the shake, and stabilizes the image formation point, It has been put to practical use in video cameras.

FIG. 4 is a basic control block diagram of a shake compensator using a variable apex angle prism (hereinafter referred to as VAP) incorporated in the conventional video camera. In FIG. 4, 101a is a small vibrating gyroscope or the like for detecting the vertical shake of the entire apparatus, and 101b is a lateral vibration of the entire apparatus. 102a, 10
Reference numeral 2b designates the vertical vibration detection signal 101a and the horizontal vibration detection signal 1
This is a filter for cutting out only the frequency band generated by camera shake from the frequency component of 01b. Reference numeral 103 denotes an arithmetic means for detecting a frequency from the pitch detection signal 101a and the roll detection signal 101b which have passed through the filters 102a and 102b and deriving a shake correction amount suitable for the state, for example, a microcomputer (hereinafter referred to as a microcomputer). ) Is realized. Reference numeral 104 denotes a VAP that serves as a shake correction unit, and as shown in FIG.
And glass plates 202a, 202b and bellows portions 203a, 203b for enclosing them.

Further, 105a is a position detecting means for detecting the vertical movement of the VAP 104, and 105b is a position detecting 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 that compares the vertical position detection signal 105a of the VAP 104 with the pitch correction signal from the calculation means 103, and similarly 106b.
Is a roll correction comparator, which is composed of an operational amplifier.
Reference numerals 107a and 107b denote driving means composed of a driving circuit and an actuator such as an electromagnetic coil.
Based on the shake correction outputs of a and 106b, the VAP 105 is moved and controlled so that the optical axis image formation point for the shake is kept constant.

FIG. 6 shows a state in which the VAP 104 is incorporated in the lens barrel, and 301 is an imaging lens and 3
Reference numeral 02 indicates an electromagnetic coil, and reference numeral 303 indicates a front protective glass.

[0007]

As described above, the camera shake correction device conventionally used for binoculars requires complicated and large-scale mechanical parts such as a cardan shaft and a gimbal frame as shake correction means. The image stabilization device itself is expensive and difficult to miniaturize. Further, the image stabilization apparatus using VAP has not been put to practical use other than a video camera.

An object of the present invention is to provide a cheap and high-performance image stabilization device to other optical equipment such as binoculars by utilizing and applying VAP which is mounted on a video camera and mass-produced and which is relatively inexpensive. Is also to be able to install.

[0009]

In order to achieve the above object, an optical apparatus having a camera shake correction function of the present invention is, in claim 1, a first optical system having a first optical axis,
A second optical system having a second optical axis different from the first optical axis, and a first optical system for correcting the first optical axis of the first optical system
Correction means, second correction means for correcting the second optical axis of the second optical system, and detection means for detecting image shake.
A control means for driving and controlling both the first correction means and the second correction means based on the output of the detection means is provided. Further, in claim 2, the first correction means and the second correction means are provided. Both the second correction means are camera shake correction devices.

[0010]

According to the present invention, a plurality of image shake correcting means (for example, a plurality of VAPs) are provided in accordance with the detection output of the image shake detecting means.
Etc.), the respective image blur correction means perform the same image blur correction, so that the image blur correction device can be applied to an optical device such as binoculars which 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. 4 is a basic control configuration diagram of this embodiment.

401a represents the vertical pitch of the entire binoculars.
Reference numeral b denotes a vertical vibration detecting means and a horizontal vibration detecting means which are small vibration gyros that utilize the Coriolis principle for detecting the horizontal vibration of the entire binoculars. The small vibration gyro is also a kind of acceleration sensor.

Reference 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 detecting means 401a and 401b, which are small vibration gyros for detecting pitch and roll. It is a filter that cuts out only the frequency band. Reference numeral 403 denotes a microcomputer that serves as means for calculating the shake correction amount.
The microcomputer 4 receives the shake detection signal obtained through 2a and 402b.
An A / D converter inside the device 03 takes in and performs integral calculation to convert the angular velocity signal into an angular displacement signal. The frequency of the converted shake detection signal is detected, and the shake correction amount is calculated according to the state at that time. The calculated shake correction amount is the microcomputer 403.
It is output via the internal D / A converter.

Reference numeral 404a is a left eye, and 404b is a VAP which serves as a shake correcting means for the right eye, and the configuration thereof is as already shown in FIG. Reference numeral 405a is a position detecting means for detecting a vertical movement of the left eye VAP 404a, 405b is a horizontal movement of the left eye VAP 404a, 405c is a vertical movement of the right eye VAP 404b, and 405d is a position detecting means for detecting a horizontal movement of the right eye VAP 404b. , Infrared light emitting diode and 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 a calculating means.
406b is the VAP
Reference numeral 406c denotes the vertical position detecting means 4 of the VAP 404b, which represents the signal from the horizontal position detecting means 405b of 404a and the left-eye roll correction signal from the microcomputer 403 which is the calculating means.
405d is the VAP 404 for the right eye pitch correction signal from the microcomputer 403, which is the calculation means.
The signal from the horizontal position detecting means 405d of b and the right-eye roll correction signal from the microcomputer 403 which is the calculating means are
This is a shake correction comparator for comparison, and is composed of an operational amplifier.

Reference numeral 407a denotes a shake correction comparator 406a, 4
Reference numeral 07b is a shake correction comparator 406b, 407c is a shake correction comparator 406c, and 407d is a shake correction comparator 406.
Each of the left and right VA is received by receiving the shake correction signal of d.
P404a and P404b are drive means for moving, and each is composed of a drive circuit and an electromagnetic coil which is an actuator.

Next, referring to the flow chart of FIG. 2, one shake detecting means to two shake correcting systems V
How the AP is independently controlled will be described. Hereinafter, each step is abbreviated as S.

A vibration gyro 401 which is a vertical pitch detecting means.
The shake detection angular velocity signals of a and the vibration gyro 401b, which is the shake detection means, pass through the filters 402a and 402b, respectively, and fetch only the required shake frequency into the A / D converter (S501). The sway detection angular velocity signal digitized by the A / D converter is subjected to integration calculation (digital integration) and converted into a vertical sway angle displacement signal δp and a horizontal sway angle displacement signal δy (S502). Each of the signals converted into the shake detection angular displacement signals δp and δy is frequency-determined and then multiplied by a displacement constant k to obtain a vertical shake correction amount ε.
p and the lateral vibration correction amount εy are calculated (S503). The calculated lateral vibration correction amount εp is calculated by the comparator 406a and 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 stored in the comparator 406b and the comparator 406d as a left-eye roll correction signal εyl and a right-eye roll correction signal, respectively. Correction signal εy
It is output as r. At this time, the shake correction amounts of 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, respectively, as comparison output values. , And VAPs 404a and 404b, which are shake correction means, are respectively driven via electromagnetic coils which are driving means for VAPs. The drive amount D at this time is determined by the comparator 406.
a, 406b, 406c, 406d outputs left eye VAP vertical drive amount Dpl, 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 and 404b
Has been shake-corrected with the same displacement amount, position detection signal γp
1, γpr, γyl, γyr are read by the microcomputer, and determination (γpl = γpr ?, γyl = γyr?) is performed (S
506). Then, the left and right vertical position signals γpl and γp
If r and 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 must be equal to each other. If (γpl
≠ γpr, or γyl ≠ γyr), calculation shake correction amount ε
One of p and εy (εpl or εpr, εyl or εyr) is increased until they are equal. Left and right position signals γp, γy
May not be equal to the two VAP4s on the left and right.
This is because there are variations in the load characteristics of 04a and 404b (S508 → S509 → S506 → S507).

Further, even if the calculated shake correction amounts εp and εy are increased to the maximum drive amount Dmax, the left and right position signals γp,
If γy does not match (γpl ≠ γpr or γyl
≠ γyr), a shake correction residual occurs, the displacement constant k is changed so as to match the smaller one of the position signals γp and γy compared to the one, and the movements of the left and right VAPs 404a and 404b are made to coincide (S510 → S506 → S50
7). In this way, VA is used as the left and right shake correction means.
When P is used, the shake correction control is performed by giving priority to balancing the left and right VAPs.

Next, FIG. 3 shows an example in which the shake correcting device is arranged on the binoculars. Reference numeral 601 is a front lens group including a focus lens, 602 is a VAP, 603 is a rear lens group including an objective lens, 604 is an eyepiece lens group, 605 is a secondary power source for controlling and driving the image stabilizing apparatus, 606
Is a control control board. It should be noted that the angular velocity sensor may be of another type or of biaxial detection. Also, other corrections may be used.

In the above embodiment, the VAP is used as the shake correction means, but the invention is not limited to this. For example, the optical member is moved in the direction orthogonal to the optical axis to deflect the light beam. Other correction means such as a correction means for performing the correction may be used.

Although a vibrating gyro has been used as a means for detecting shaking, other angular accelerometers may be used, and the invention is not limited to angular accelerometers, and accelerometers, speedometers, displacement meters Other detection methods such as the above can also be applied.

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

[0025]

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

[Brief description of drawings]

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

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

FIG. 3 is a layout view 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 is a variable apex angle prism incorporated in a conventional video camera lens barrel.

[Explanation of symbols]

401a, 401b Shake detecting means 402a, 402b Filter 403 Microcomputer 404a, 404b VAP (Variable vertical angle prism) 405a, 405b, 405c, 405d Position detecting means 406a, 406b, 406c, 406d Correction comparator 407a, 407b, 407c, 407d Drive means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Go Moroto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Hidekage Sato 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (2)

[Claims] 1. A first optical system having a first optical axis, a second optical system having a second optical axis different from the first optical axis, and a first optical system of the first optical system. A first correcting means for correcting the first optical axis, a second correcting means for correcting the second optical axis of the second optical system, a detecting means for detecting a shake of an image, and a detecting means of the detecting means. An optical device having a camera shake correction function, comprising: a control unit that drives and controls both the first correction unit and the second correction unit based on an output. 2. An optical device with a camera shake correction device according to claim 1, wherein the first correction means and the second correction means are both a camera shake correction device. .