WO2007141986A1 - 画像揺れ補正装置 - Google Patents
画像揺れ補正装置 Download PDFInfo
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- WO2007141986A1 WO2007141986A1 PCT/JP2007/059656 JP2007059656W WO2007141986A1 WO 2007141986 A1 WO2007141986 A1 WO 2007141986A1 JP 2007059656 W JP2007059656 W JP 2007059656W WO 2007141986 A1 WO2007141986 A1 WO 2007141986A1
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- Prior art keywords
- rotation
- shake
- movable
- amount
- control
- Prior art date
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/681—Motion detection
- H04N23/6812—Motion detection based on additional sensors, e.g. acceleration sensors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
- G03B2205/003—Movement of one or more optical elements for control of motion blur by a prism with variable angle or the like
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0053—Driving means for the movement of one or more optical element
Definitions
- the present invention relates to an image shake correction apparatus that appropriately controls the amount of movement of a movable refractive element within a predetermined movable range when correcting image shake.
- Patent Documents 1 to 3 include a pair of movable refracting elements that change the refraction direction of light incident on an optical lens, detect the shake generated in the imaging device, and cancel the detected shake.
- An image shake correction apparatus that corrects image shake by independently rotating the movable refractive element in the direction perpendicular to the optical axis has been proposed.
- Patent Document 1 JP-A-03-094214
- Patent Document 2 Japanese Patent Laid-Open No. 04-352124
- Patent Document 3 JP-A 63-169614
- the amount of rotation of the two movable refraction elements rotated in the positive direction toward the optical axis direction and the direction of rotation in the negative direction toward the optical axis direction are rotated. If the two movable refraction elements are equal in the amount of rotation in the negative direction, the magnitude of the image shift angle vector in the positive and negative directions determined from these amounts of rotation is generally asymmetric.
- the first quadrant image shift angle vector which is the vector sum of the image shift angle vectors of the two movable refractive elements determined by the amount of rotation in the positive direction, and the two values determined by the amount of rotation in the negative direction.
- the magnitude differs from the third quadrant image shift vector, which is the vector sum of the image shift angle vectors of the movable refractive element.
- the present invention has been made in view of the above problems, and provides an image shake correction apparatus capable of appropriately controlling the amount of rotation of the movable refraction element within the movable range when correcting image shake.
- the purpose is to do.
- a first feature of the image shake device is a shake detection unit that detects a shake in a horizontal or vertical direction generated in an imaging device and outputs a shake signal based on the detected shake, and an optical lens.
- a first movable refractive element that is arranged on an incident optical path to change the refractive direction of light incident on the optical lens in a horizontal direction, a second movable refractive element that changes in a vertical direction, and a first movable refractive element.
- the first and second rotation means are rotation amounts of the first and second movable refraction elements rotated in the positive direction.
- the maximum in the positive direction when the first quadrant image shift angle determined from the above and the third quadrant image shift angle determined from the amount of rotation of the first and second movable refractive elements rotated in the negative direction match.
- the gist is to set the amount of rotation from the maximum positive rotation amount indicating the maximum rotation amount to the maximum negative rotation amount indicating the maximum negative rotation amount as the movable range.
- a second feature of the image shake device is a shake detection unit that detects a shake in a horizontal or vertical direction generated in an imaging device and outputs a shake signal based on the detected shake, and an optical lens.
- a first movable refractive element that is arranged on the incident optical path to change the refractive direction of light incident on the optical lens in a horizontal direction, a second movable refractive element that changes in a vertical direction, and a first movable refractive element.
- a first rotating means for rotating the refracting element within a predetermined movable range with a clockwise direction as a positive direction and a counterclockwise direction as a negative direction toward the incident direction of light to the optical lens; and a second movable refraction Counter-clockwise rotation of element toward optical lens Based on the second rotation means that rotates within a predetermined movable range with the positive direction and the clockwise direction as the negative direction, and the shake signal output by the shake detection means, the horizontal or vertical shake is canceled out.
- a rotation control amount calculation means for calculating a rotation control amount of the first and second rotation means, and a first and second rotation based on the rotation control amount calculated by the rotation control amount calculation means.
- Rotation control means for controlling the means, and the first and second rotation means are first quadrant image shift angles determined from the rotation amounts of the first and second movable refraction elements rotated in the forward direction.
- the maximum rotation amount in the positive direction when the difference between the third quadrant image shift angle determined from the rotation amounts of the first and second movable refractive elements rotated in the negative direction is within a predetermined range.
- the amount of rotation from the maximum amount of rotation in the positive direction to the maximum amount of rotation in the negative direction indicating the maximum amount of rotation in the negative direction
- the gist is to make it a moving range.
- FIG. 1 is a block diagram showing a configuration of an image shake apparatus according to an embodiment of the present invention.
- FIG. 2 is a schematic view showing a correction unit of the image shake correction apparatus shown in FIG. 1, FIG. 2 (a) is a schematic front view, and FIG. 2 (b) is a schematic side view.
- FIG. 3 is a configuration diagram of the correction unit shown in FIG. 2, FIG. 3 (a) is a front view, and FIG. 3 (b) is a diagram shown in FIG. 2 (a).
- FIG. 3 (c) is a cross-sectional view seen from the direction B shown in FIG. 2 (a).
- FIG. 4 is a perspective view of a fixed prism provided in the correction unit shown in FIG.
- Fig. 5 Arrangement of actuators and sensors provided in the correction unit shown in Fig. 3.
- Fig. 5 (a) is a schematic side view
- Fig. 5 (b) is an arrangement of the actuators and sensors of the movable prism 10A
- Fig. 5 (c) is an arrangement diagram of the actuator and sensor of the movable prism 10B.
- FIG. 6 is a diagram for explaining the movement of a subject image by a prism
- FIG. 6 (a) is a diagram for explaining the refraction of light by the prism
- FIG. 6 (b) is a diagram illustrating the prism from the front in FIG. It is a view.
- FIG. 7 is a diagram showing an image shift angle vector when the movable prism does not rotate.
- FIG. 8 is a diagram for explaining the movement of the subject image when the movable prism is rotated.
- FIG. 8 (a) is a diagram showing an image shift angle vector when the movable prism is rotated, and FIG. It is the figure which took out the variation
- FIG. 9 is a diagram showing a form of parallel movement of the subject image (subject), and FIG. 9 (a) is moved to the second quadrant.
- Fig. 9 (b) is a diagram moved to the first quadrant
- Fig. 9 (c) is a diagram moved to the third quadrant
- Fig. 9 (d) is a diagram moved to the fourth quadrant.
- FIG. 10 (a) is an explanatory diagram showing the magnitude of the composite image shift angle vector when the magnitude of the image shift angle vector of the movable prism is made equal
- FIG. 10 (b) is the composite image
- FIG. 5 is an explanatory diagram showing the magnitude of the image shift angle betatoner of the movable prism when the magnitudes of the shift angle vectors are equal.
- FIG. 11 (a) is an explanatory diagram showing the combined image shift angle vector of the movable prism
- FIG. 11 (b) is an explanatory diagram showing the image shift angle vector of the movable prism.
- Fig. 12 is a diagram for explaining the converted focal length and the shift plane
- Fig. 12 (a) is a diagram for explaining the converted focal length
- Fig. 12 (b) is a diagram for explaining the shift amount.
- FIG. 13A is a diagram for explaining camera shake correction
- FIG. 13A is a diagram for explaining movement of a subject image due to camera shake
- FIG. 13B is a diagram for explaining camera shake correction.
- FIG. 14 is a flowchart showing a processing flow of camera shake control of the image shake correction apparatus according to the present embodiment.
- 15 An explanatory diagram showing the magnitude of the image shift angle vector of the movable prism when the difference between the first quadrant image shift angle and the third quadrant image shift angle vector falls within a predetermined range.
- FIG. 16 is a flowchart showing a processing flow of the image shake correction apparatus according to the second modification of the present embodiment.
- FIG. 17 is an explanatory diagram of the camera shake control start determination process when the camera shake control start means determines that the rotation angles ⁇ 10, ⁇ 20 and the rotation angles ⁇ , ⁇ 2 are equal values.
- (a) is a diagram showing a camera shake angle ⁇ * required to correct the image shake of the movable prisms 10A and 10B with respect to time t
- FIG. 17 (b) is an image shake apparatus according to the second modification. It is a figure which shows camera-shake angle
- FIG. 18 It is an explanatory diagram of the camera shake control start determination process when the camera shake control start means determines that the absolute value of the difference between the rotation angles 10 and 20 and the rotation angles 1 and 2 is minimum.
- 18 (a) is a diagram showing the camera shake angle ⁇ * required to correct the image shake of the movable prisms 10A and 10B with respect to time t
- FIG. 18 (b) is an image shake device according to Modification 2.
- FIG. 8 is a diagram showing a camera shake angle ⁇ * at which the camera shake correction control is started.
- FIG. 19 is a diagram illustrating the determination process
- FIG. 19 (a) is a diagram showing the camera shake angle ⁇ * necessary for correcting the shake of the images of the movable prisms 10A and 10B with respect to time t
- FIG. 10 is a diagram illustrating a camera shake angle ⁇ * that is controlled to start a camera shake operation by the image shake device according to the present embodiment.
- FIG. 20 is a block diagram showing a functional configuration of an image shake correction apparatus according to Modification 4 of the present embodiment.
- FIG. 21 is a flowchart showing a processing flow of an image shake correction apparatus according to Modification 4.
- FIG. 22 is an explanatory diagram of camera shake control start determination processing in the image shake correction apparatus according to modification example 4.
- FIG. 23 is a diagram showing the lens system in FIG. 1.
- FIG. 24 is a diagram showing another arrangement relationship between the correction unit and the lens system shown in FIG. 1.
- FIG. 24 (a) is a diagram in which the correction unit is arranged in the lens system
- FIG. 24 (b) is a lens system. It is the figure which has arrange
- FIG. 25 is a diagram showing a correction unit without a fixed prism as another configuration of the correction unit according to the present embodiment.
- FIG. 25 (a) is a front view
- FIG. 25 (b) is a plan view
- FIG. ) Is a side view.
- FIG. 26 is a diagram showing a correction unit including two fixed prisms as another configuration of the correction unit according to the present embodiment, FIG. 26 (a) is a front view, FIG. 26 (b) is a plan view, FIG. 26 (c) is a side view.
- FIG. 27 is a diagram showing another configuration of the prism according to the present embodiment.
- FIG. 27 (a) is a diagram showing a single prism
- FIG. 27 (b) is a diagram showing a compound prism
- FIG. 27 (c) is a diagram. It is a figure which shows the parallel plate which has a prism effect.
- image shake compensation is performed by appropriately controlling the rotation amount of the movable prism within a predetermined movable range so that the rotation amount of the movable prism necessary for correcting the image fluctuation does not exceed the movable range.
- a description will be given by taking the primary device as an example.
- FIG. 1 is a block diagram showing an embodiment of an image shake correction apparatus according to the present invention.
- the image shake correction apparatus of the present invention is provided in, for example, a video camera 1 that is an imaging apparatus.
- the video camera 1 captures a subject, a correction unit 2 including a fixed prism 9 and a pair of movable prisms 10A and 10B that can independently rotate about the optical axis la as a rotation center.
- Lens system 3 a CCD unit 13 that forms an image of the incident light from the lens system 3 and converts the formed subject image into an electrical signal, a CDS function, an AGC function, and an A / D conversion function
- the preprocessing IC unit 19, the camera DSP unit 20 that performs various digital processing on the input signal coming from the preprocessing IC unit 19, and the pair of movable prisms in the correction unit 2 are determined in advance independently.
- Actuators 4A and 4B that rotate within a predetermined movable range, a camera shake detection unit 5 that detects a shake by an angular velocity of the video camera 1 due to a camera shake, etc., and outputs a camera shake signal, and a CPU 6 that performs various controls Depending on the control signal from CPU6, the actuator 4A, 4 A motor drive electronic circuit (MDE) 7 for driving B, sensors 8A and 8B for detecting the rotation state of a pair of movable prisms in the correction unit 2, and a storage unit 24 for storing data necessary for camera shake control, etc. And an external operation system 26 having operation buttons and the like.
- MDE motor drive electronic circuit
- the CPU 6 calculates the rotation control amount calculation means 6A for calculating the rotation control amounts of the actuators 4A and 4B so as to cancel out the shake detected by the shake detection unit 5, and the rotation control amount calculation means 6A.
- Rotation control means 6B for controlling the actuators 4A, 4B based on the rotation control amount
- camera shake control start means for transmitting a shake control start signal for starting the control of the actuators 4A, 4B to the rotation control means 6B. Equipped with 6D.
- the correction unit 2 is disposed between the lens system 3 and a hood portion lb that covers the front surface of the lens system 3, and is shown in FIGS. 3 (a) to 3 (c).
- a fixed prism 9 that is fixedly installed, and a pair of movable prisms 10A and 10B that are rotatable about the optical axis are provided.
- the fixed prism 9 has a first surface 9a orthogonal to the optical axis la and a first surface 9a facing the first surface 9a with a slight angle of inclination.
- This is a prism made of talyl or the like and having a second surface 9b.
- the movable prisms 10A and 10B have the same shape and material.
- FIG. 5 is an arrangement diagram of the actuator and sensor provided in the correction unit 2 shown in FIG. 3.
- FIG. 5 (a) is a schematic side view
- FIG. 5 (b) is an arrangement of the actuator and sensor of the movable prism 10A.
- Fig. 5 (c) is an arrangement diagram of the actuator and sensor of the movable prism 10B.
- the actuator and sensor are attached to the corrector 2. As shown in FIGS. 5B and 5C, the actuator 4A and the sensor 8A are for the movable prism 10A, and the actuator 4B and the sensor 8B are for the movable prism 10B.
- the actuators 4A and 4B rotate the movable prisms 10A and 10B within a predetermined movable range of the movable prisms 10A and 10B according to a control signal from the rotation control means 6B of the CPU 6.
- the actuators 4A and 4B are composed of a small pulse motor with a small load torque, a small linear motor, a small ultrasonic motor, or the like.
- the sensors 8A and 8B are composed of a small photo interrupter, MR element, Hall element, and the like, detect the rotation state of the movable prisms 10A and 10B, and output the rotation state information to the CPU 6.
- a small photo interrupter When a small photo interrupter is used as the sensor 8A, 8B, it is used in combination with a pulse motor, the outer peripheral side of the movable prisms 10A, 10B is masked, and holes 10a, 10b are provided on the masking, respectively. .
- the holes 10a and 10b are provided so as to come to the positions of the sensors 8A and 8B when the movable prisms 10A and 10B are in the initial positions.
- the small photo interrupter includes an infrared light emitting diode and a phototransistor, and is installed so that the movable prism 10A or 10B is disposed between the infrared light emitting diode and the phototransistor.
- the small photo interrupter detects the origin position by rotating the movable prisms 10A and 10B when the power is turned on, and receiving the light of the infrared light emitting diode that has passed through the holes 10a and 10b by the phototransistor.
- the information on the rotation state of the movable prisms 10A and 1OB can be obtained by counting the number of pulses at the time of rotation with zero at the origin position.
- FIG. 6 is a diagram for explaining the movement of the subject image by the prism
- FIG. 6 (a) is a diagram for explaining the refraction of light by the prism
- FIG. 6 (b) is a diagram for FIG. 6 (a). It is the figure which looked at the lever prism from the front direction (a direction).
- Fig. 6 (b) the prism 11 shown in Fig. 6 (a) is rotated only on a plane perpendicular to the a direction.
- the incident light is refracted by the prism 11 at the refraction angle i ', and as a result, the image of the subject A is shifted to A' toward the P point (parallel). Moving.
- ⁇ is the prism angle (incident angle of light) of the prism 11
- L is the prism length
- ⁇ is the prism height
- ⁇ is Prism height of the thinnest part
- ⁇ is the refractive index
- vector Is the image shift angle vector.
- ⁇ is the image shift angle (deflection)
- a is the prism rotation angle
- L is the prism rotation amount
- vectore is the unit vector in the image shift direction
- vector ⁇ ' Is the image shift angle vector.
- vector represents a vector quantity. In FIG. 6 and subsequent figures, these vector quantities are shown in bold instead of the symbol “vector”.
- FIG. 7 is a diagram showing an image shift angle solid tone when the movable prisms 10A and 10B do not rotate (initial state).
- vector ⁇ , vector ⁇ , and vector ⁇ are fixed
- Image shift angle vectors by the prism 9 and the movable prisms 10A and 10B are image shift angle vectors by the prism 9 and the movable prisms 10A and 10B.
- the fixed prism 9 is such that vector ⁇ cancels the combined vector of vector ⁇ and vector ⁇ .
- the position of the movable prisms 10A and 10B is set.
- the three fixed prisms 9 and the movable prisms 10A and 10B are equivalent to a parallel plate, so that the incident angle and the emission angle of the correction unit 2 are the same, and the subject image does not move.
- FIG. 8 is a diagram for explaining the movement of the subject image when the movable prisms 10A and 10B are rotated.
- FIG. 8 (a) is a diagram showing an image shift angle vector when the movable prism is rotated.
- FIG. 8B is a diagram in which the amount of change in the image shift angle vector shown in FIG.
- FIG. 8 (a) when the movable prisms 10A and 10B are rotated by ⁇ and a, respectively.
- the direction of rotation is the positive direction of ⁇ and a. That is, the movable prism 10A transmits light to the lens system 3.
- a clockwise direction toward the incident direction is defined as a positive direction
- a counterclockwise direction is defined as a negative direction
- a counterclockwise direction toward the incident direction of light to the lens system 3 is defined as a positive direction
- a clockwise direction is defined as a negative direction.
- the image shift angle vector is a composite vector vector ⁇ of vector ⁇ and vector ⁇ , and ab
- the sign of ⁇ is selected as +.
- Fig. 9 is a diagram showing a form of parallel movement of the subject image (subject)
- Fig. 9 (a) is a diagram in which the subject has moved to the second quadrant
- Fig. 9 (b) is a diagram in which the subject is in the first quadrant
- Fig. 9 (c) is a diagram in which the subject has moved to the third quadrant
- Fig. 9 (d) is a diagram in which the subject has moved to the fourth quadrant.
- the rotation angle from the maximum positive rotation angle to the maximum negative rotation angle is the movable range.
- FIG. 10 (a) is an explanatory diagram showing the magnitude of the combined image shift angle vector when the magnitudes of the image shift angle vectors of the movable prisms 10A and 10B are equal
- FIG. 10 (b) FIG. 5 is an explanatory diagram showing the magnitudes of image shift angle vectors of movable prisms 10A and 10B when the magnitudes of the combined image shift angle vectors are equal.
- the image shift angle vector 105 obtained by rotating the movable prisms 10A and 10B in the positive direction becomes smaller. Therefore, in order to obtain the same amount of the composite image shift angle vector in the first quadrant and the third quadrant, it is necessary to rotate the movable prisms 10A and 10B more in the positive direction.
- the rotation angles H and a of the movable prisms 10A and 10B are biased toward the upper limit in the positive direction of the movable range.
- the movable range of the movable prisms 10A and 10B is shown.
- the magnitudes of the positive shift angle vectors 101 and 102 and the negative shift angle vectors 103 and 104 of the movable prisms 10A and 10B are different.
- the movable range of the movable prisms 10A and 10B becomes wider in the positive direction that needs to be rotated more greatly, so that the rotation angles a and a of the movable prisms 10A and 10B are biased to the upper limit in the positive direction of the movable range.
- FIG. 11 (a) shows the combined image shift angle vectors of the movable prisms 10A and 10B.
- (b) shows an image shift angle vector of the movable prism 10A.
- the movable ranges of the movable prisms 10A and 10B are determined so as to match, the movable range of the movable prism 10A is shifted in the positive direction as shown in FIG. 11 (b). For this reason, even when the positive direction needs to be rotated more greatly as in the image shift angle vector 111 of the movable prism 10A, the rotation angle of the movable prism 10A is appropriately controlled so as not to exceed the movable range.
- the movable range of the movable prisms 10A and 10B is realized by a mechanical stopper. It may be realized or realized as an electrical limiter.
- FIG. 12 is a diagram for explaining the converted focal length and the shift amount
- FIG. 12 (a) is a diagram for explaining the converted focal length
- FIG. 12 (b) is a diagram for explaining the shift amount.
- S is the distance from the subject A to the first principal point of the lens system 3
- f is the lens.
- FIG. 13 is a diagram for explaining camera shake correction
- FIG. 13 (a) is a diagram for explaining movement of a subject image due to camera shake
- FIG. 13 (b) is a diagram for explaining camera shake correction.
- the subject image 14A ' is moved to the position of the subject image 14A and the camera shake is corrected.
- FIG. 14 is a flowchart showing a processing flow of camera shake control of the image shake correction apparatus according to the present embodiment.
- the camera shake control start means 6D of the CPU 6 receives the camera shake correction start request signal by the user's push button operation or the like received by the external operation system 26
- the camera shake control start means 6D sends the camera shake control start signal to the rotation control means 6B. Send (step S 101).
- the rotation control means 6B that has received the shake control start signal transmits a shake angle calculation command to the rotation control amount calculation means 6A, and receives the shake angle calculation command and calculates the rotation control amount.
- the means 6A receives a camera shake signal from the camera shake detector 5 every predetermined time, and calculates a camera shake angle based on the received camera shake signal (steps S 105 and S 107).
- the camera shake detection unit 5 detects a shake of the video camera 1 due to a camera shake, and outputs this to the rotation control amount calculation means 6A of the CPU 6 as a camera shake signal.
- the rotation control amount calculation means 6A of the CPU 6 calculates a shake angle vector vector ⁇ ′ indicating the magnitude and direction of the shake based on the shake signal.
- the rotation control amount calculation means 6A calculates the rotation angles ⁇ , a of the movable prisms 10A, 10B necessary to perform the camera shake correction based on the camera shake angle calculated in step S105 (formula 1 5) to (
- the CPU 6 receives the rotation angle H and H calculated by the rotation control means 6B force rotation control amount calculation means 6A of the CPU 6, and controls the movable prisms 10A and 10B so that the rotation angle becomes H and a.
- the motor drive electronic circuit 7 drives the actuators 4A, 4B in accordance with a control signal from the rotation control means 6B of the CPU 6, and the actuators 4A, 4B are movable prisms within a predetermined movable range. Rotate 10A and 10B so that the rotation angle is ⁇ .
- the rotation control means 6 ⁇ of the CPU 6 repeats the processing of steps S103 to S109 until it receives a shake control stop signal from the shake control start means 6D of the CPU 6 ( Step SI 11).
- Rotation from the positive maximum rotation amount indicating the maximum positive rotation amount to the negative maximum rotation amount indicating the maximum negative rotation amount when the third quadrant image shift angle determined from the rotation amount of The amount of movement is set to the movable range of the movable prisms 10A and 10B, and the movable prisms 10A and 10B are rotated so as to cancel the shake detected by the shake detection unit 5 to correct image shake due to camera shake. Therefore, the amount of rotation of the movable prisms 10A and 10B can be appropriately controlled within a predetermined movable range so that the amount of rotation of the movable prisms 10A and 10B required does not exceed the movable range.
- the image shake correction apparatus is rotated in the negative direction and the first quadrant image shift angle determined from the rotation amount of the movable prisms 10A and 10B rotated in the positive direction toward the optical axis direction.
- the positive positive maximum rotation amount indicates the negative maximum rotation amount when the third quadrant image shift angle determined from the rotation amounts of the movable prisms 10A and 10B coincides with the negative positive maximum rotation amount.
- the amount of rotation up to the maximum direction of rotation is the movable range of the movable prisms 10A and 10B.
- the amount of rotation from the maximum amount of rotation in the negative direction to the maximum amount of rotation in the negative direction is defined as the movable range of the movable prisms 10A and 10B.
- FIG. 15 shows the magnitude of the image shift angle betatoning of the movable prisms 10A and 10B when the difference between the first quadrant image shift angle vector and the third quadrant image shift angle vector falls within a predetermined range.
- the difference between the magnitude of the angle vector 105 and the magnitude of the third quadrant image shift angle vector 106 that also determines the rotation angle and a force of the movable prisms 10A and 10B rotated in the negative direction is within a predetermined range.
- the movable range of the movable prisms 10A and 10B is determined.
- the magnitudes of the positive shift angle vectors 101, 102 and the negative shift angle vectors 103, 104 of the movable prisms 10A, 10B are different, and the first quadrant image shift angle vectors 105 and 103 are different from each other.
- the magnitude of the quadrant image shift angle vector 106 is also different.
- the rotation angles and ⁇ of the movable prisms 10A and 10B are appropriate so as not to exceed the movable range.
- the rotation amount of the movable prism that is necessary for correcting the image shake does not exceed the movable range.
- the image shake correction apparatus to be controlled as described above has been described as an example.
- an image shake correction apparatus that appropriately controls the rotation amount of the movable prism within a predetermined movable range by adjusting the timing at which the camera shake correction control is started will be described.
- the movable prisms 10A and 10B required to receive the rotation angle information of the movable prisms 10A and 10B from the sensors 8 and 8 and correct the camera shake based on the shake detected by the camera shake detection unit 5.
- the rotation angle is calculated, and the calculated rotation angle is compared with the rotation angle calculated based on the received rotation angle information.When the values match, or the absolute value of these differences is minimized, the rotation angle is An image shake correction apparatus that transmits a shake control start signal for starting the control of the motion control means 6 ⁇ hair cuters 4 ⁇ and 4 ⁇ will be described.
- the camera shake control start means 6D of the CPU 6 receives the camera shake correction start request signal by an external operation. Later, the rotation angle detected by sensors 8 and 8 and a and rotation control
- It is characterized by transmitting a shake control start signal that starts control of the actuators 4 and 4.
- FIG. 16 is a flowchart showing a processing flow of the image shake correction apparatus according to the second modification. is there.
- the camera shake control start means 6D of the CPU 6 receives a camera shake correction start request signal by a user's push button operation or the like received by the external operation system 26 (step S201), it is detected by the sensors 8A and 8B.
- the rotation information of the movable prisms 1 OA and 1 OB received is calculated, and the rotation angles a and a are calculated (step S203).
- the shake control start means 6D of the CPU 6 transmits a shake angle calculation command to the rotation control amount calculation means 6A and receives the calculation command of the shake angle vector vector ⁇ *.
- 6A receives the camera shake signal from the camera shake detector 5 and calculates the camera shake angle vector vector ⁇ * based on the received camera shake signal (steps S205 and S207).
- the rotation control amount calculation means 6A calculates the rotation angle of the movable prisms 10A and 10B necessary for correcting the camera shake based on the camera shake angle vector vector ⁇ * calculated in step S207.
- the camera shake detection unit 5 detects a shake of the video camera 1 due to a camera shake, and outputs this to the rotation control amount calculation means 6A of the CPU 6 as a camera shake signal.
- the rotation control amount calculation means 6A of the CPU 6 calculates a shake angle vector vector ⁇ * indicating the magnitude and direction of the shake based on this shake signal using (Equation 27) and (Equation 28).
- the rotation control amount calculation means 6A of the CPU 6 calculates ⁇ , which is a component of the beta vector vector ⁇ based on (Expression 15) to (Expression 21).
- the camera shake control starting means 6D of the CPU 6 determines whether or not to start the camera shake correction control (steps S 211 to S215).
- the camera shake control start means 6D of the CPU 6 includes the rotation angles H and H calculated based on the rotation information of the movable prisms 10A and 10B detected by the sensors 8A and 8B.
- the camera shake control start means 6D of the CPU 6 includes the rotation angle ,, ⁇ and the rotation angle ⁇ , ⁇
- step S 21 1 When 10 20 1 2 is equal (step S 21 1), or the rotation angle ,, a and the rotation angle ,, a
- FIG. 17 shows the camera shake control start means 6D force S, rotation angle ⁇ 1 , a and rotation angle ⁇ 1, ⁇ of CPU 6
- FIG. 10 is an explanatory diagram of camera shake control start determination processing when it is determined that 10 20 1 2 is an equal value.
- Fig. 17 (a) shows the camera shake angle ⁇ * required to correct the image shake of the movable prisms 10A and 10B with respect to time t
- Fig. 17 (b) shows the image shake according to Modification 2. The camera shake angle ⁇ * at which the camera shake correction control is started by the device is shown.
- the movable prisms 10A and 10B are independently movable in the vertical direction and the horizontal direction, so that the camera shake angles ⁇ * in the vertical direction and the horizontal direction are independently calculated.
- FIG. 17 for the sake of simplicity, the camera shake angle ⁇ * in the vertical direction that is corrected by the movable prism 10A is shown.
- the camera shake angle curve 171 represents the camera shake angle ⁇ * necessary for correcting the shake of the image of the movable prism 10A with respect to time t. Due to the asymmetry of the torque, the center force of vibration of hand shake angle curve 171 is shifted to the plus side by ⁇ from hand shake angle correction zero position.
- the camera shake control start means 6D of the CPU 6 receives the rotation information of the movable prism 10A detected by the sensor 8A at T1, and obtains the value of the rotation angle ⁇ corresponding to “cO”. "cO" is
- the shake control start means 6D of the CPU 6 transmits a shake angle calculation command to the rotation control amount calculation means 6A, and the rotation control amount calculation means 6A starts from the shake detector 5 after time T1.
- the camera shake signal is received, and the camera shake angle ⁇ * is calculated based on the received camera shake signal.
- the rotation control amount calculating means 6A calculates the rotation angle of the movable prism 10A necessary for correcting the camera shake based on the calculated camera shake angle ⁇ * (Equation 15) to Calculate using (Equation 21).
- the camera shake control start means 6D of the CPU 6 includes the rotation angle calculated based on the rotation information of the movable prism 1OA detected by the sensor 8A, and the rotation control amount calculation means 6 of the CPU 6.
- the rotation angle ⁇ of the movable prism 10A calculated by A is compared.
- the camera shake control start means 6D of the CPU 6 sends a camera shake control start signal for starting the control of the two actuators 4A and 4B to the rotation control means 6B of the CPU 6.
- the rotation control means 6B of the CPU 6 that has received the camera shake control start signal from the camera shake control start means 6D starts the camera shake correction control.
- the rotation control means 6B of the CPU 6 starts the camera shake correction control at time T2. Further, as described above, the movable angle range of the movable prisms 10A and 10B is set to the movable range of the movable prisms 10A and 10B.
- the central force of the vibration of curve 172 Matches the center of the predetermined movable range of movable prism 10A, and the amount of rotation of movable prism 10A is controlled appropriately within the movable range so that camera shake correction curve 172 does not exceed the movable range. be able to.
- FIG. 18 shows the shake control start means 6D force of the CPU 6 and the rotation angles ⁇ , a and ⁇ , a
- FIG. 10 is an explanatory diagram of camera shake control start determination processing when it is determined that the absolute value of the difference from 10 20 1 2 is the minimum.
- the camera shake angle curve 181 shown in FIG. 18 (a) shows the camera shake angle ⁇ * necessary for correcting the shake of the images of the movable prisms 10A and 10B with respect to the time t. Due to the asymmetry, the center of vibration of the hand shake angle curve 181 is shifted to the plus side by ⁇ from the hand shake angle correction zero position.
- FIG. 18 (b) shows the camera shake angle ⁇ * at which the camera shake correction control is started by the image shake device according to the second modification.
- FIG. 18 as in FIG. 17, for the sake of simplicity, the camera shake angle curve is shown in the vertical direction in which correction is performed by the movable prism 10A.
- the camera shake control start means 6D of the CPU 6 can detect the sensor 8A at T1.
- the rotation information of the moving prism 10A is received and the value of the rotation angle ⁇ corresponding to “cl” is obtained.
- the shake control start means 6D of the CPU 6 transmits a shake angle calculation command to the rotation control amount calculation means 6 ⁇ , and after T1, the rotation control amount calculation means 6 ⁇ receives from the shake detector 5
- the camera shake signal is received, and the camera shake angle ⁇ * is calculated based on the received camera shake signal.
- the rotation control amount calculation means 6 ⁇ calculates the rotation angle of the movable prism 10A necessary for performing the shake correction based on the calculated shake angle ⁇ * (Equation 15) to Calculate using (Equation 21).
- the camera shake control start means 6D of the CPU 6 includes the rotation angle calculated based on the rotation information of the movable prism 1 OA detected by the sensor 8 ⁇ , and the rotation control amount calculation means 6 of the CPU 6.
- the rotation angle of the movable prism 10A calculated by A is compared.
- the rotation control amount calculation means 6A of the CPU 6 determines the difference between the rotation angle and the rotation angle.
- the counter value is calculated as a rotation angle phase difference, and the calculated rotation angle phase difference is stored in the storage unit 24.
- the camera shake control start means 6D of the CPU 6 reads the rotation angle phase difference stored in the storage unit 24, and the read rotation angle phase difference and the newly calculated rotation angle phase difference force.
- the rotation angle phase difference is minimized. That is, the absolute value of the rotation angle of the movable prism 10A calculated by the rotation control amount calculation means 6A is less than the absolute value of the rotation angle e corresponding to “cl”, and
- the camera shake control start means 6D of the CPU 6 transmits a control start signal for starting the control of the two actuators 4A to the rotation control means 6B of the CPU 6 when the time T2 is exceeded.
- the center force of the vibration of the camera shake correction curve 182 shifts to the center side of the movable range of the movable prism 10A.
- the movable prism 10A, 10B rotation angle ⁇ , ⁇ of the movable range of the movable prism 10 ⁇ , 10 ⁇ shift angle vector size is asymmetric
- the movable prisms 10A and 10B have a movable range of rotation angles H and a.
- the amount of rotation of the movable prism 1 OA can be controlled appropriately within the movable range so that the image stabilization curve 182 does not exceed the movable range.
- the rotation amount detected by the sensors 8A and 8B and the rotation control amount calculated by the rotation control amount calculation means 6A after receiving the camera shake correction start request signal by an external operation When the absolute value of the difference between the rotation amount and the rotation control amount is minimized, a control start signal for starting the control of the two actuators 4A, 4B is transmitted to the rotation control means 6B. Therefore, the movable amount of the movable prisms 10A and 10B must be adjusted within the predetermined movable range so that the amount of camera shake correction necessary to correct the image shake of the movable prisms 10A and 1OB does not exceed the movable range. Can be controlled.
- the rotation amount detected by the sensors 8 and 8 and the rotation control amount calculated by the rotation control amount calculation means 6 ⁇ match, or the absolute value of the difference between the rotation amount and the rotation control amount.
- the camera shake control start signal for starting the control of the two actuators 4 ⁇ and 4 ⁇ is sent to the rotation control means 6 ⁇ ⁇ ⁇ when is minimized.
- the absolute value of the difference between the rotation amount detected by the sensors 8 and 8 and the rotation control amount calculated by the rotation control amount calculation means 6 ⁇ is within the predetermined allowable rotation angle range. When the absolute value of the difference between the rotation amount and the rotation control amount is at a minimum, the rotation control means 6
- the camera shake control start signal for starting the control of the data 4A and 4B is transmitted.
- FIG. 19 shows the CPU 6 camera shake control start means 6D force S, rotation angles ⁇ , a and rotation angles ⁇ , ⁇
- FIG. 10 is an explanatory diagram of camera shake control start determination processing when it is determined that the absolute value of the difference from 10 20 1 2 is within a predetermined rotation angle allowable range.
- FIG. 19 (a) shows the camera shake angle ⁇ * required to correct the image shake of the movable prisms 10A and 10B with respect to time t
- FIG. 19 (b) shows the image shake according to this embodiment. The camera shake angle ⁇ * controlled by the device to start the camera shake operation is shown.
- FIG. 19 shows the camera shake angle ⁇ * in the vertical direction in which correction is performed by the movable prism 10A for the sake of simplicity, as in FIG.
- the camera shake angle curve 191 represents the camera shake angle ⁇ * necessary for correcting the shake of the image of the movable prism 10A with respect to time t. Due to the asymmetry of the spectrum, the vibration center of the camera shake angle curve 191 is shifted to the plus side by ⁇ ⁇ from the camera shake angle correction zero position.
- the CPU 6 starts camera shake control start determination processing.
- the camera shake control starting means 6D of the CPU 6 receives the rotation information of the movable prism 10A detected by the sensor 8A at T1, and obtains the value of the rotation angle ⁇ corresponding to “c2”.
- the camera shake control start means 6D of the CPU 6 transmits a camera shake angle calculation command to the rotation control amount calculation means 6 ⁇ , and after T1, the rotation control amount calculation means 6 ⁇ The camera shake signal is received, and the camera shake angle ⁇ * is calculated from (Equation 15) to (Equation 21) based on the received camera shake signal.
- the rotation control amount calculation means 6 ⁇ ⁇ calculates the rotation angle of the movable prism 10A necessary for performing the camera shake correction based on the calculated camera shake angle ⁇ *.
- the camera shake control start means 6D of the CPU 6 includes the rotation angle calculated based on the rotation information of the movable prism 1 OA detected by the sensor 8 ⁇ and the rotation control amount calculation means 6 of the CPU 6.
- the camera shake control starting means 6D of the CPU 6 transmits a control start signal for starting the control of the two actuators 4A and 4B to the rotation control means 6B of the CPU 6.
- the value of the allowable rotation angle range K is a condition for starting control of camera shake correction, and is set depending on how much deviation of the movable range of the movable prisms 10A and 10B with respect to the range of camera shake correction is allowed. .
- the larger this value is, the sooner the camera shake correction control can be started after receiving a shake correction start request signal by a user's push button operation, etc.
- the smaller this value the images of the movable prisms 10A and 1OB. To reduce the deviation between the center of vibration of the image stabilization amount necessary to correct the shaking of the camera and the center of the movable range of the movable prisms 10A and 10B. It becomes difficult to exceed.
- the rotation angle allowable range K is preset by a provider of the image shake correction apparatus or the like and stored in the storage unit 24.
- the camera shake correction control is started at the time T2, so that the rotation angle allowable range determined in advance by the image shake correction apparatus according to the modification 2 is set.
- the camera shake correction control can be started earlier by the time corresponding to the range K.
- the movable range of the rotation angles a and a of the movable prisms 10A and 10B is movable.
- the movable range of the rotation angles ⁇ , a of the movable prisms 10A, 10B is shifted to the plus side by ⁇ H.
- the rotation amount of the movable prism 10A can be appropriately controlled within the movable range so that the camera shake correction curve 192 does not exceed the movable range.
- the rotation amount of the movable prism that is necessary for correcting the image shake does not exceed the movable range.
- the image shake correction apparatus to be controlled as described above has been described as an example.
- FIG. 20 is a block diagram showing a functional configuration of an image shake correction apparatus according to the fourth modification.
- the image shake correction apparatus according to the modified example 4 includes a predetermined amount of time calculated by the rotation control amount calculation means 6A in addition to the configuration of the image shake correction apparatus shown in FIG. Calculate the rotation angle start setting value K by calculating the amplitude of the rotation control amount from the maximum value and minimum value of the rotation control amount, and multiplying the calculated amplitude by a preset multiple of the set value amplitude to obtain the sensor 8A, 8B.
- Rotation angle detected by step S, force S equal to this rotation amount start set value ⁇ 1, ⁇ 2
- the initial control means 6C for initial control of the actuators 4A and 4B is provided, and after the shake control start means 6D receives the shake correction start request signal by external operation, the initial control means 6C initial control of the hair actuators 4A and 4B is performed.
- An initial control start signal is transmitted to start rotation, and the rotation angle H, a calculated by the rotation control amount calculation means 6A and the initial control means
- FIG. 21 is a flowchart showing a process flow of the image shake correction apparatus according to the fourth modification.
- step S301 when the camera shake control start means 6D of the CPU 6 receives a camera shake correction start request signal by a user's push button operation or the like received by the external operation system 26 (step S301), it is detected by the sensors 8A and 8B.
- the rotation information of the movable prisms 1 OA and 1 OB received is calculated and the rotation angles a and a are calculated (step S303).
- the shake control start means 6D of the CPU 6 transmits a shake angle calculation command to the rotation control amount calculation means 6A and receives the calculation command of the shake angle vector vector ⁇ *.
- 6A receives the camera shake signal from the camera shake detector 5 and calculates the camera shake angle vector vector ⁇ * based on the received camera shake signal (steps S305 and S307).
- the rotation control amount calculation means 6A calculates the rotation angle of the movable prisms 10A and 10B necessary for correcting the camera shake based on the camera shake angle vector vector ⁇ * calculated in step S307.
- the camera shake detection unit 5 detects a shake of the video camera 1 due to a camera shake, and outputs this to the rotation control amount calculation means 6A of the CPU 6 as a camera shake signal.
- the rotation control amount calculation means 6A of the CPU 6 is based on this camera shake signal, and shows a hand shake indicating the magnitude and direction of the shake.
- the angle vector vector ⁇ * is calculated using (Equation 27) and (Equation 28).
- the rotation control amount calculation means 66 of the CPU 6 calculates ⁇ , which is a component of the beta vector ⁇ based on (Expression 15) to (Expression 21).
- the rotation control amount calculation means 6A of the CPU 6 sequentially stores the calculated rotation angles, ⁇ in association with the time in the storage unit 24 until a predetermined time elapses (step S311).
- the predetermined time for storing the rotation angle ,, a in the storage unit 24 is the maximum value of the shake amplitude.
- the camera shake control start means 6D of the CPU 6 determines whether or not to start the camera shake correction control (steps S313 to S327).
- an initial control start signal for starting the initial control of the camera shake control start means 6D force initial control means 6C hair cursor 4A, 4B of the CPU 6 is transmitted (step
- the initial control means 6C that has received the initial control start signal extracts the maximum value and the minimum value from the values of the rotation angles a 1 and ⁇ 2 stored in the storage unit 24 (step S315).
- the initial control means 6C determines the maximum value and the maximum value of the rotation angles ⁇ , a extracted in step S315.
- the amplitude of camera shake is calculated from the small value, and the rotation amount start set values ⁇ 1 and ⁇ 2 are calculated from the calculated amplitude of camera shake (step S317).
- the initial control means 6C of the CPU 6 determines from the maximum value and minimum value of the rotation angle ⁇ , ⁇ .
- the rotation amount start set values ⁇ 1 and ⁇ 2 are set by multiplying the calculated hand shake amplitude by the set value amplitude multiple read from the storage unit 24.
- This set value amplitude multiple can be freely set between 0 and:!, And is set in advance by the provider of the image shake correction apparatus and stored in the storage unit 24.
- the initial control means 6C of the CPU 6 determines that the rotation angle ,, a calculated based on the rotation angle information received from the sensors 8 ⁇ and 8 ⁇ ⁇ is equal to the rotation amount start set values ⁇ 1, ⁇ 2.
- the rotation angles ⁇ , a of the movable prisms 10A, 10B become the rotation angles ⁇ , a corresponding to the rotation amount start set values ⁇ 1, ⁇ 2.
- the movable prisms 10A and 1OB are rotated until 10 20 100 200 is reached.
- the shake control start means 6D of the CPU 6 transmits a calculation command for the shake angle vector vector ⁇ * to the rotation control amount calculation means 6A, and the rotation control amount calculation means 6A that receives this calculation instruction
- the camera shake detector 5 receives the camera shake signal, calculates the camera shake angle vector vector ⁇ * based on the received camera shake signal, and the rotation control amount calculation means 6A calculates the camera shake based on the camera shake angle vector vector ⁇ *.
- the rotation angles, of the movable prisms 10A, 10B necessary for correction are calculated (steps S321 to S325).
- the camera shake detection unit 5 detects a shake of the video camera 1 due to a camera shake every predetermined time, and outputs this as a camera shake signal to the rotation control amount calculation means 6A of the CPU 6.
- the rotation control amount calculation means 6A of the CPU 6 calculates a shake angle vector vector s * indicating the magnitude and direction of shake based on this shake signal using (Equation 27) and (Equation 28).
- the rotation control amount calculation means 6A of the CPU 6 calculates ⁇ , a which is a component of the rotation angle vector vector ⁇ based on (Equation 15) to (Equation 21).
- the camera shake control start means 6D of the CPU 6 corresponds to the rotation angles ⁇ , a and the rotation amount start set values ⁇ 1, ⁇ 2 of the movable prisms 10A, 10B calculated by the rotation control amount calculation means 6A.
- step S327 Are compared with each other.
- the camera shake control start means 6D of the CPU 6 includes the rotation angle ⁇ ,
- an initial control stop signal is transmitted to the initial control means 6C, and the actuator 4A, so that the rotation angle calculated by the rotation control amount calculation means 6A is obtained.
- a camera shake control start signal for starting the control of 4B is transmitted to the rotation control means 6B (step S329).
- FIG. 22 is an explanatory diagram of camera shake control start determination processing in the image shake correction apparatus according to the fourth modification.
- FIG. 22 (a) shows the camera shake angle ⁇ * necessary to correct the image shake of the movable prisms 10A and 10B with respect to time t
- FIG. 22 (b) shows the image shake apparatus according to the present embodiment. Indicates the camera shake angle ⁇ * at which the camera shake correction control is started.
- the camera shake angle ⁇ * in the vertical and horizontal directions is calculated independently, and the camera shake start determination process is performed.
- the camera shake angle ⁇ * in the vertical direction is shown.
- the camera shake angle curve 221 represents the camera shake angle ⁇ * necessary to correct the image shake of the movable prism 10A with respect to time t. Due to the asymmetry of the spectrum, the center of vibration of the camera shake angle curve 221 is shifted to the plus side by ⁇ from the camera shake angle correction zero position.
- the rotation control amount calculation means 6A of the CPU 6 receives the rotation information of the movable prism 10A detected by the sensor 8A at time T1, and turns it into “cO”. Get the value of the corresponding rotation angle a10. “cO” represents the initial position of the movable prism 10A when a camera shake correction start request signal is received by an external operation by a user or the like.
- the shake control start means 6D of the CPU 6 transmits a shake angle calculation command to the rotation control amount calculation means 6A, and after T1, the rotation control amount calculation means 6A is shaken at a predetermined time interval.
- the camera shake signal is received from the detector 5, and the camera shake angle ⁇ * is calculated based on the received camera shake signal.
- the rotation control amount calculation means 6A calculates the rotation angle ⁇ of the movable prism 10A necessary for correcting the camera shake based on the calculated camera shake angle ⁇ * (Equation 15) to Calculate using (Equation 21).
- the camera shake control start means 6D of the CPU 6 transmits an initial control start signal for starting the initial control of the initial control means 6C hair actuator 4 at 2 o'clock when a predetermined time has elapsed.
- the initial control means 6C Upon receiving the initial control start signal, the initial control means 6C calculates the rotation amount start setting value ⁇ 1, and after 2 o'clock, the rotation angle of the movable prism 10A corresponds to the rotation amount start setting value ⁇ 1.
- Actuator 4 ⁇ is initially controlled so that the rotation angle becomes equal.
- the rotation angle is the rotation angle corresponding to the rotation amount start set value ⁇ 1.
- the camera shake control start means 6D of the CPU 6 includes the rotation angle ⁇ corresponding to the rotation amount start set value ⁇ 1 and the movable prism 10A calculated by the rotation control amount calculation means 6 ⁇ of the CPU 6.
- the rotation control means 6 ⁇ of the CPU 6 that has received the shake control start signal from the shake control start means 6D starts the shake correction control.
- the rotation control means 6 ⁇ of the CPU 6 starts camera shake correction control at 4 o'clock.
- the movable angle range of the movable prisms 10A and 10B is set to the movable range of the movable prisms 10A and 10B.
- the central force of the vibration of the curve 222 The rotation amount of the movable prism 10A is appropriately controlled within the movable range so as to coincide with the center of the predetermined movable range of the movable prism 10A and so that the image stabilization curve 222 does not exceed the movable range be able to.
- the lens system 3 is depicted as one block, but it may be configured as a plurality of lens groups.
- Fig. 23 is a diagram showing the lens system 3 in Fig. 1
- Fig. 24 (a) is a diagram in which the correction unit 2 is arranged in the lens system 3
- Fig. 24 (b) is a diagram in which the correction unit 2 is arranged behind the lens system 3.
- FIG. 23 is a diagram showing the lens system 3 in Fig. 1
- Fig. 24 (a) is a diagram in which the correction unit 2 is arranged in the lens system 3
- Fig. 24 (b) is a diagram in which the correction unit 2 is arranged behind the lens system 3.
- the lens system 3 includes first to fourth lens groups 3a to 3d. Behind the lens system 3, an optical low-pass filter 16 for suppressing noise (false signal) and a CCD unit 13 for forming a subject image are provided.
- the force that the correction unit 2 is arranged in front of the lens system 3 as shown in Fig. 23 may be arranged inside the lens system 3 as shown in Fig. 24 (a). Alternatively, it may be arranged behind the lens system 3 as shown in FIG. As a result, the correction unit 2 is arranged in a narrow portion of the light beam after passing through the lens system 3 or after passing through, so that the correction unit 2 can be reduced in size.
- the correction unit 2 has a configuration including the fixed prism 9 and the movable prisms 10A and 10B.
- the fixed prism 9 may be omitted. It is also possible to adopt a configuration in which one is added.
- FIG. 25 is a view showing a correction unit without a fixed prism
- FIG. 25 (a) is a front view
- FIG. 25 (b) is a plan view
- FIG. 25 (c) is a side view
- FIG. 26 is a view showing a correction unit including two fixed prisms
- FIG. 26 (a) is a front view
- FIG. 26 (b) is a plan view
- FIG. 26 (c) is a side view.
- the fixed prism 9 is configured so that the incident angle and the outgoing angle of the correction unit 2 are the same in the initial state. This is due to the effect of chromatic aberration due to the prism action during image shake correction. This is to minimize image misalignment and reduce image misalignment correction due to chromatic aberration.
- the incident angle and the outgoing angle are not the same in the initial state.
- the image shift due to chromatic aberration is larger than in the cases of Figs.
- the length of the correction unit 2 in the optical axis direction can be shortened to reduce the size.
- each prism in the embodiment shown in FIGS. 3, 25 and 26 may be a single unit. Yes, you can use a composite prism. Further, a parallel plate having a prism effect may be used.
- FIG. 27 (a) is a diagram showing a single prism
- FIG. 27 (b) is a diagram showing a compound prism
- FIG. 27 (c) is a diagram showing a parallel plate having a prism effect.
- the movable prism 10A may be a composite prism in which two prisms lOAa and lOAb having a minute angle are bonded together as shown in FIG. If a composite prism is used, the angle of the prism alone can be increased, and a prism with a small angle that is difficult with a single prism can be easily manufactured.
- the prism requires production control of the tilt angle, but the parallel plate 17 can be easily processed.
- the rotation amount of the movable refraction element is determined in advance so that the rotation amount of the movable refraction element necessary for correcting the image shake does not exceed the movable range. It can be properly controlled within the movable range.
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Abstract
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JP2008520467A JP4666191B2 (ja) | 2006-05-26 | 2007-05-10 | 画像揺れ補正装置 |
EP07743091A EP2034355B1 (en) | 2006-05-26 | 2007-05-10 | Image blurring correction device |
US12/227,692 US7881596B2 (en) | 2006-05-26 | 2007-05-10 | Image fluctuation correction device |
DE602007013227T DE602007013227D1 (de) | 2006-05-26 | 2007-05-10 | Bildunschärfe-korrektureinrichtung |
CN2007800192813A CN101454715B (zh) | 2006-05-26 | 2007-05-10 | 图像模糊修正装置 |
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EP (1) | EP2034355B1 (ja) |
JP (1) | JP4666191B2 (ja) |
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WO2012077772A1 (ja) * | 2010-12-06 | 2012-06-14 | 株式会社アルファラボ・ソリューション | 像ぶれ補正ユニット、像ぶれ補正装置及び光学装置 |
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JP4857363B2 (ja) * | 2009-06-11 | 2012-01-18 | キヤノン株式会社 | 像振れ補正装置および撮像装置 |
CN104796596B (zh) * | 2014-01-20 | 2018-07-06 | 联想(北京)有限公司 | 一种信息处理方法及电子设备 |
CN105486492A (zh) * | 2016-01-12 | 2016-04-13 | 佛山市南海盐步康士柏机电有限公司 | 利用图像测定汽车led车头灯偏转角的检测箱及检测方法 |
WO2021106447A1 (ja) * | 2019-11-29 | 2021-06-03 | 富士フイルム株式会社 | 撮像支援装置、撮像システム、撮像支援方法、及びプログラム |
CN113163091B (zh) * | 2021-04-27 | 2023-04-18 | 台湾立讯精密有限公司 | 影像补偿装置及其棱镜承载机构 |
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- 2007-05-10 CN CN2007800192813A patent/CN101454715B/zh active Active
- 2007-05-10 EP EP07743091A patent/EP2034355B1/en active Active
- 2007-05-10 US US12/227,692 patent/US7881596B2/en active Active
- 2007-05-10 DE DE602007013227T patent/DE602007013227D1/de active Active
- 2007-05-10 JP JP2008520467A patent/JP4666191B2/ja not_active Expired - Fee Related
- 2007-05-10 WO PCT/JP2007/059656 patent/WO2007141986A1/ja active Application Filing
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JPH0394214A (ja) | 1989-09-06 | 1991-04-19 | Asahi Optical Co Ltd | 像安定化装置 |
JPH04352124A (ja) | 1991-05-30 | 1992-12-07 | Toshihiro Tsumura | 光学機器に於ける光軸偏角装置 |
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WO2012077772A1 (ja) * | 2010-12-06 | 2012-06-14 | 株式会社アルファラボ・ソリューション | 像ぶれ補正ユニット、像ぶれ補正装置及び光学装置 |
US9025034B2 (en) | 2010-12-06 | 2015-05-05 | Alpha Labo Solution, Ltd. | Image blur correction unit, image blur compensation device, and optical apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN101454715B (zh) | 2011-03-30 |
JPWO2007141986A1 (ja) | 2009-10-15 |
US7881596B2 (en) | 2011-02-01 |
CN101454715A (zh) | 2009-06-10 |
EP2034355B1 (en) | 2011-03-16 |
JP4666191B2 (ja) | 2011-04-06 |
EP2034355A1 (en) | 2009-03-11 |
EP2034355A4 (en) | 2010-01-27 |
DE602007013227D1 (de) | 2011-04-28 |
US20090175608A1 (en) | 2009-07-09 |
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