CN101561617B - Image stabilizing device, camera apparatus and optical equipment - Google Patents

Image stabilizing device, camera apparatus and optical equipment Download PDF

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Publication number
CN101561617B
CN101561617B CN2009101352168A CN200910135216A CN101561617B CN 101561617 B CN101561617 B CN 101561617B CN 2009101352168 A CN2009101352168 A CN 2009101352168A CN 200910135216 A CN200910135216 A CN 200910135216A CN 101561617 B CN101561617 B CN 101561617B
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lens unit
unit
lens
correcting
coil
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CN101561617A (en
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斋藤润一
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Canon Inc
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Canon Inc
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Abstract

The present invention relates to an image stabilizing device, a camera apparatus and optical equipment. The image stabilizing device includes a first lens unit; a second lens unit; a support unit, forsupporting the first and the second lens units; a driving unit, for driving both of the first and the second lens units along a direction vertical to an optical axis; a sway detection unit, for detecting the sway applied to the image stabilizing device; a sway correction unit, for providing a driving signal to the driving unit to correct the detected sway; and a linkage unit, for mechanically coupling the first lens unit and the second lens unit, wherein the linkage unit is configured that the first lens unit and the second lens unit may move along reciprocal directions in a plane being vertical to the optical axis.

Description

Image stabilizing device, picture pick-up device and optical device
Technical field
The present invention relates to a kind of improvement and rock the image blurring image stabilizing device that (shake) causes, and also relate to a kind of picture pick-up device or optical device that comprises this image stabilizing device by camera.
Background technology
Recent camera (camera) can carry out important images photographing process (for example, exposure decision and focus adjustment) automatically in shooting operation, even if unskilled user can not fail in shooting operation yet.Camera system be configured to proofread and correct may by rocking of camera cause image blurring.Thereby, do not had almost to cause that the user produces the factor of error in shooting operation.
Following simple declaration can be proofreaied and correct the image blurring example system that rocking of camera causes.Rocking of camera is vibration in 1Hz to 10Hz frequency range in the shooting operation.Even when rocking, still can catch no image blurring image when depressing shutter release button, must detect that camera rocks and move the lens that to be used to image stabilization (below be called " correcting lens ") according to detected value for this camera takes place.Therefore, even in order when camera shakes, still to capture no image blurring image, must accurately detect the rocking of camera (vibration) and proofread and correct and rock the optical axis that causes by camera and change.
Can be by being installed in the detection that detecting unit realizes that camera rocks of rocking on the camera.In theory, rock detecting unit sense acceleration, angular acceleration, angular velocity or angular displacement, and handle the output (below be called " image blur correcting ") that is used for image stabilization with calculating.Camera arrangement rocks the correcting lens that information-driven can the travelling shot optical axis and carries out image blur correcting based on detected.
Discuss as Japanese kokai publication hei 2-162320 communique or Japanese kokai publication hei 11-167074 communique, traditional camera fluctuation correction device uses the opposite lens of a pair of focal power (power), and makes this a pair of lens balance.
But according to Japanese kokai publication hei 2-162320 communique, linkage assembly (girder construction) extends along optical axis direction, remains on equilibrium state with the lens that focal power is opposite.Therefore, the volume of camera fluctuation correction device is relatively large.Because correcting lens is supported by beam and the member that can linger rotates,, may make the degree of accuracy deterioration of focus direction so camera rolling normal moveout correction may cause the offset on the optical axis direction.
According to Japanese kokai publication hei 11-167074 communique, be equipped with two image blur compensation devices, proofreading and correct the image blurring of two axles, thereby can't make the volume miniaturization of device.
Summary of the invention
Exemplary embodiment of the present invention relates to a kind of compactness, energy-conservation image blur compensation device, this device can reduce the offset that may be caused by the weight of first correcting lens and second correcting lens of the image that is formed on the imaging surface, and exemplary embodiment of the present invention also relates to picture pick-up device or the optical device that comprises described image blur compensation device.
According to an aspect of the present invention, a kind of image stabilizing device comprises: first lens unit, and this first lens unit comprises first correcting lens; Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens; Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis; Driver element, this driver element be configured to along described direction perpendicular to described optical axis drive described first lens unit and described second lens unit the two; Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; Rock correcting unit, this rocks correcting unit and is configured to based on described output of rocking detecting unit drive signal be offered described driver element, to proofread and correct described rocking; And linkage unit, this linkage unit is configured to described first lens unit of mechanical connection and described second lens unit; Wherein, described linkage unit is configured to: by described first lens unit of described drive unit drives and described second lens unit time, described linkage unit can make described first lens unit and described second lens unit move along opposite directions in the plane perpendicular to described optical axis.
According to a further aspect in the invention, a kind of picture pick-up device, it comprises: image stabilizing device, this image stabilizing device comprises: first lens unit, this first lens unit comprises first correcting lens; Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens; Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis; Driver element, this driver element be configured to along described direction perpendicular to described optical axis drive described first lens unit and described second lens unit the two; Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; Rock correcting unit, this rocks correcting unit and is configured to based on described output of rocking detecting unit drive signal be offered described driver element, to proofread and correct described rocking; And linkage unit, this linkage unit is configured to described first lens unit of mechanical connection and described second lens unit; Wherein, described linkage unit is configured to: described linkage unit can make described first lens unit and described second lens unit move along opposite directions in the plane perpendicular to described optical axis by described first lens unit of described drive unit drives and described second lens unit time, and described linkage unit can be eliminated the mobile mobile component on the direction of described optical axis that causes by described first lens unit and described second lens unit.
According to a further aspect of the present invention, a kind of optical device, it comprises: image stabilizing device, this image stabilizing device comprises: first lens unit, this first lens unit comprises first correcting lens; Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens; Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis; Driver element, this driver element be configured to along described direction perpendicular to described optical axis drive described first lens unit and described second lens unit the two; Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; Rock correcting unit, this rocks correcting unit and is configured to based on described output of rocking detecting unit drive signal be offered described driver element, to proofread and correct described rocking; And linkage unit, this linkage unit is configured to described first lens unit of mechanical connection and described second lens unit; Wherein, described linkage unit is configured to: described linkage unit can make described first lens unit and described second lens unit move along opposite directions in the plane perpendicular to described optical axis by described first lens unit of described drive unit drives and described second lens unit time, and described linkage unit can be eliminated the mobile mobile component on the direction of described optical axis that causes by described first lens unit and described second lens unit.
According to another aspect of the invention, a kind of image stabilizing device, it comprises: first lens unit, this first lens unit comprises first correcting lens; Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens; Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis; First coil, this first coil is fixed to described first lens unit; First magnet, this first magnet is fixed to described first lens unit; Second coil, this second coil is fixed to described second lens unit; Second magnet, this second magnet is fixed to described second lens unit; Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; And rocking correcting unit, this rocks correcting unit and is configured to by current supply is arrived described first coil and described second coil, to proofread and correct described rocking; Wherein, the relation that described first coil and described first magnet are configured to face with each other, the relation that described second coil and described second magnet are configured to face with each other makes described first lens unit and described second lens unit to move along opposite directions in the plane perpendicular to described optical axis.
According to also one side of the present invention, a kind of image stabilizing device, it comprises: first lens unit, this first lens unit comprises first correcting lens; Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens; Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis; First coil, this first coil is fixed to described first lens unit; Second coil, this second coil is fixed to described first lens unit; First magnet, this first magnet is fixed to described second lens unit; Second magnet, this second magnet is fixed to described second lens unit; Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; And rocking correcting unit, this rocks correcting unit and is configured to drive signal is offered described first coil and described second coil to proofread and correct described rocking; Wherein, the relation that described first coil and described first magnet are configured to face with each other, the relation that described second coil and described second magnet are configured to face with each other makes described first lens unit and described second lens unit to move along opposite directions in the plane perpendicular to described optical axis.
According to also one side of the present invention, a kind of image stabilizing device, it comprises: first lens unit, this first lens unit comprises first correcting lens; Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens; Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis; Fixed component, described support unit are installed and are arrived this fixed component; First coil, this first coil is fixed to described first lens unit; Second coil, this second coil is fixed to described second lens unit; First magnet and second magnet, described first magnet and described second magnet are fixed to described fixed component; Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; And rocking correcting unit, this rocks correcting unit and is configured to drive signal is offered driver element to proofread and correct described rocking; Linkage unit, this linkage unit is configured to described first lens unit of mechanical connection and described second lens unit, wherein, the relation that described first coil and described first magnet are configured to face with each other, the relation that described second coil and described second magnet are configured to face with each other makes described first lens unit and described second lens unit to move along opposite directions in the plane perpendicular to described optical axis; Wherein, described second coil of described first coil of described first lens unit, described second lens unit and described first magnet and described second magnet that are arranged on the described fixed component constitute described driver element.
Exemplary embodiment of the present invention can reduce the offset of the image on the imaging surface that the weight of first correcting lens and second correcting lens causes effectively, and can realize compact dimensions, image blur compensation device, picture pick-up device or optical device that power consumption is few.
From below in conjunction with the detailed description of accompanying drawing to exemplary embodiment, other features of the present invention and aspect will become obvious.
Description of drawings
The accompanying drawing that is combined in the instructions and constitutes the part of instructions illustrates exemplary embodiment of the present invention and feature with instructions, is used to illustrate of the present invention to the small part principle.
Fig. 1 illustrates the front view that is provided in the image blur compensation device in the digital camera according to first exemplary embodiment of the present invention.
Fig. 2 illustrates along the sectional view of the line A1-A2 truncated picture blur correction device shown in Fig. 1.
Fig. 3 illustrates along the sectional view of the line B-A2 truncated picture blur correction device shown in Fig. 1.
Fig. 4 is the enlarged drawing of the indicated part of the C among Fig. 3.
Fig. 5 illustrates the block scheme of using drive circuit system according to the lens unit of first exemplary embodiment of the present invention.
Fig. 6 illustrates the driven equilibrium along pitch orientation according to the image blur compensation device of first exemplary embodiment of the present invention.
Fig. 7 illustrates the driven equilibrium along yaw direction according to the image blur compensation device of first exemplary embodiment of the present invention.
Fig. 8 illustrates the front view that is provided in the image blur compensation device in the digital camera according to second exemplary embodiment of the present invention.
Fig. 9 illustrates along the sectional view of the line A3-A4 truncated picture blur correction device shown in Fig. 8.
Figure 10 illustrates the front view that is provided in the image blur compensation device in the digital camera according to the 3rd exemplary embodiment of the present invention.
Figure 11 illustrates along the sectional view of the line A5-A6 truncated picture blur correction device shown in Figure 10.
Figure 12 A and Figure 12 B illustrate the enlarged drawing of the indicated part of D among Figure 11.
Figure 13 illustrates the front view that is provided in the image blur compensation device in the digital camera according to the 4th exemplary embodiment of the present invention.
Figure 14 illustrates along the sectional view of the line A7-A8 truncated picture blur correction device shown in Figure 13.
Figure 15 A and Figure 15 B illustrate the enlarged drawing of the part of the E indication among Figure 14.
Figure 16 illustrates the front view that is provided in the image blur compensation device in the digital camera according to the 5th exemplary embodiment of the present invention.
Figure 17 illustrates along the sectional view of the line A9-A10 truncated picture blur correction device shown in Figure 16.
Figure 18 illustrates the enlarged drawing of the indicated part of F among Figure 17.
Figure 19 illustrates the front view that is provided in the image blur compensation device in the digital camera according to the 6th exemplary embodiment of the present invention.
Figure 20 illustrates along the sectional view of the line A11-A12 truncated picture blur correction device shown in Figure 19.
Figure 21 A and Figure 21 B illustrate the enlarged drawing of the indicated part of G among Figure 20.
Figure 22 illustrates the front view according to the image blur compensation device of the 7th exemplary embodiment of the present invention.
Figure 23 illustrates along the sectional view of the line A13-A14 truncated picture blur correction device of Figure 22.
Figure 24 illustrates along the sectional view of the line A13-H1 truncated picture blur correction device shown in Figure 22.
Figure 25 illustrates the front view according to the image blur compensation device of the 8th exemplary embodiment of the present invention.
Figure 26 illustrates along the sectional view of the line A15-A16 truncated picture blur correction device shown in Figure 25.
Figure 27 illustrates the front view according to the image blur compensation device of the 9th exemplary embodiment of the present invention.
Figure 28 illustrates along the sectional view of the line A17-A18 truncated picture blur correction device shown in Figure 27.
Figure 29 illustrates along the sectional view of the line A17-H2 truncated picture blur correction device shown in Figure 27.
Figure 30 illustrates along the sectional view of the line J-A18 truncated picture blur correction device shown in Figure 27.
Figure 31 A and Figure 31 B illustrate the enlarged drawing of the part of the K indication among Figure 30.
Figure 32 illustrates the outward appearance according to picture pick-up device of the present invention.
Figure 33 illustrates the stereographic map that is provided in the figure blur correction device in the picture pick-up device according to of the present invention.
Figure 34 illustrates the block scheme that is used for the circuit arrangement of rocking corrective system of picture pick-up device according to of the present invention.
Embodiment
The following explanation of exemplary embodiment in fact only is illustrative and never be used to limit the present invention, application of the present invention or use.Should be noted that in whole instructions, similar in the accompanying drawings Reference numeral and the similar parts of letter indication, in a single day thereby parts have been described in a width of cloth accompanying drawing, then the accompanying drawing in the back may no longer illustrate this parts.Describe each exemplary embodiment in detail hereinafter with reference to accompanying drawing.
According to many aspects of the present invention, the following describes first to the 9th exemplary embodiment.
Figure 32 illustrates the outward appearance that has the compact digital camera of image blur correcting function according to of the present invention.When the compact digital camera be subjected to by arrow 1042p and 1042y indicated with respect to optical axis 1041 teetertotter or during double swerve, this compact digital camera carries out image blur correcting.Camera body 1043 comprises release-push 1043a, pattern rotating disk 1043b (comprising main switch) and retractable flashing light unit 1043c.
Figure 33 illustrates the stereographic map of the exemplary mechanism of the image blur compensation device that is equipped with in the compact digital camera according to this exemplary embodiment.Imageing sensor 1044 is an electric signal with the subject image transitions.
Image blur compensation device 1053 drives correcting lens 1052 along the both direction of arrow 1058p and 1058y indication, carries out image blur correcting on the both direction by arrow 1042p and 1042y indication shown in Figure 32, is described in detail below.
Rock the rolling momentum of detecting unit (for example, turn meter or angular accelerometer) 1045p detection along arrow 1046p.Another rocks the rolling momentum of detecting unit 1045y detection along arrow 1046y.The output that computing unit 1047p will rock detecting unit 1045p is converted to and will be provided to the driving desired value of correcting lens 1052.The output that another computing unit 1047y will rock detecting unit 1045y is converted to and will be provided to the driving desired value of correcting lens 1052.
Figure 34 is the block scheme that the details of computing unit 1047p shown in Figure 33 and 1047y is shown.Because computing unit 1047p is similar each other with computing unit 1047y, so Figure 34 illustrates the example of the circuit arrangement of computing unit 1047p.
Computing unit 1047p comprises: the amplifying unit 1048p that also is used as direct current cut-off filter (DC cutfilter); Also be used as the amplifying unit 1049p of low-pass filter; AD conversion unit (below be called " A/D converting unit ") 1410p; Camera microcomputer 1411; And driver element 1420p, these all are the element that is surrounded by the dot-and-dash line among Figure 34.Camera microcomputer 1411 comprises storage unit 1412p, differentiation element 1413p, direct current cut-off filter 1414p, integral unit 1415p, sensitivity adjusting unit 1416p, storage unit 1417p, differentiation element 1418p and pulse width modulation duty converting unit (PWM duty conversionunit) 1419p.
In the present invention, rocking detecting unit 1045p is the gyrotron (vibration gyro) that can detect the angular velocity that camera rocks.The unlatching of the main switch of this gyrotron response camera and starting working begins to detect the angular velocity that rocks that is applied to camera.
Amplifying unit 1048p is can be as the mimic channel of direct current cut-off filter, and amplifying unit 1048p removes direct current biasing component (bias component) and amplifies the received signal that rocks from rocking received the rocking of detecting unit 1045p the signal.Amplifying unit 1048p has following frequency characteristic: can the cutoff frequency scope be equal to or less than the signal content of 0.1Hz, staying the camera that may act on camera simultaneously, to rock frequency band be 1 to 10Hz signal content.
But, when using can be by the characteristic of the signal content that is equal to or less than 0.1Hz the time,, need about 10 seconds ability fully by DC component from rocking after detecting unit 1045p input rocks signal.Therefore, in the about 0.1 second short duration after the camera main switch is opened, the time constant of amplifying unit 1048p is set to less value.For example, with the property settings of amplifying unit 1048p for can the cutoff frequency scope being equal to or less than the signal content of 10Hz.
In this mode, amplifying unit (direct current cut-off filter) 1048p has following characteristic: can end DC component in about 0.1 second short time, then increase time constant with the signal content in the frequency range that is equal to or less than 0.1Hz.As a result, amplifying unit (direct current cut-off filter) 1048p can prevent to rock the angular velocity signal deterioration.
Amplifying unit 1049p is can be as the mimic channel of low-pass filter, and the output signal that amplifying unit 1049p suitably amplifies amplifying unit (direct current cut-off filter) 1048p according to A/D resolution is rocked the high frequency noise that comprises in the angular velocity signal to end.Therefore, in the sampling operation that rocks angular velocity signal of the microcomputer 1411 that will enter camera, A/D converting unit 1410p can reduce and may rock the reading error that the noise in the angular velocity signal causes by being included in.
A/D converting unit 1410p samples to the output signal of amplifying unit (low-pass filter) 1049p.Camera microcomputer 1411 receives the output signal of A/D converting unit 1410p.Amplifying unit (direct current cut-off filter) 1048p is by the direct current biasing component.But, rock angular velocity signal and may comprise the direct current biasing component by what amplifying unit (low-pass filter) 1049p amplified.Therefore, camera microcomputer 1411 ends the direct current biasing component that comprises in the output signal of A/D converting unit 1410p.
For example, after opening the camera main switch through during 0.2 second duration, the sampled value that angular velocity signal is rocked in storage unit 1412p storage.Differentiation element 1413p obtains the value of storing among the storage unit 1412p and currently rocks poor between the angular velocity signal, with by DC component.
Yet above-mentioned operation by DC component is rough (because open behind the camera main switch through during 0.2 second duration, the angular velocity signal that rocks of sampling not only comprises DC component, comprises that also actual camera rocks component).Therefore, the direct current cut-off filter 1414p in the camera microcomputer 1411 utilizes digital filter thoroughly by DC component.
With also the amplifying unit 1048p as the analog DC cut-off filter is similar, when opening behind the camera main switch duration through 0.4 second (=0.2 second+0.2 second), direct current cut-off filter 1414p can change its time constant and increase time constant gradually.
More specifically, direct current cut-off filter 1414p has following filtering feature: through during 0.2 second duration, can the cutoff frequency scope be equal to or less than the signal content of 10Hz after opening the camera main switch.Direct current cut-off filter 1414p is reduced to 5Hz → 1Hz → 0.5Hz → 0.2Hz with 50 milliseconds the time interval with filter cutoff frequency.
But if in the aforesaid operations process, the cameraman partly presses shutter release button (that is, opening switch sw1) to carry out photometry/range operation, and then the cameraman can begin shooting operation immediately, does not expect with changing time constant for a long time.
Therefore, in this case, direct current cut-off filter 1414p interrupts being used to change the operation of time constant according to shooting condition.For example, if the photometry result show shutter speed be 1/60 and the photography focal length be 150mm, then the precision of picture steadiness does not need very high, therefore, when direct current cut-off filter 1414p obtains can the cutoff frequency scope to be equal to or less than the characteristic of signal content of 0.5Hz, the change operation of direct current cut-off filter 1414p deadline constant.
More specifically, direct current cut-off filter 1414p is based on the change amount of the product control time constant of shutter speed and photography focal length.Thereby, can reduce the time that changes time constant, and make shutter regularly preferential.Much less, if shutter speed is higher or focal length is shorter, when then direct current cut-off filter 1414p obtains can the cutoff frequency scope to be equal to or less than the characteristic of signal content of 1Hz, the change operation of direct current cut-off filter 1414p deadline constant.If shutter speed is lower and focal length is longer, camera microcomputer 1411 is restrained shooting operations till the operation that direct current cut-off filter 1414p becomes time constant end value is finished.
Integral unit 1415p begins to ask the integration of the output signal of direct current cut-off filter 1414p, so that angular velocity signal is converted to angle signal.Sensitivity adjusting unit 1416p suitably amplifies angle signal behind the integration according to the range information of the focal length of current camera and subject.Sensitivity adjusting unit 1416p changes amplifying signal, makes to rock the portion that is driven that angle drives the camera fluctuation correction device in right amount according to camera.In the zoom/focus operation, when changing, need above-mentioned correction usually when responding the variation of photographic optical system with respect to the amount of movement optical axis offset that is driven portion.
When partly pressing shutter release button, camera microcomputer 1411 begins to drive the mechanical part (below abbreviate " image blur compensation device " as) of image blur compensation device.At this moment, expectation prevents that image blur compensation device from beginning its image blur correcting operation suddenly.
Storage unit 1417p and differentiation element 1418p can prevent beginning suddenly of image blur correcting operation.Storage unit 1417p storage partly presses the camera of shutter release button time point integral unit 1415p to rock angle signal.Differentiation element 1418p obtains poor between the output signal of the output signal of integral unit 1415p and storage unit 1417p.
Therefore, two signals that enter differentiation element 1418p at the time point of partly pressing shutter release button are equal to each other.The output signal (driving desired value) that is produced by differentiation element 1418p is zero.Then, the lasting output signal of starting from scratch.Storage unit 1417p has following effect: will partly press the integrated signal of the time point of shutter release button to be set at initial value.Therefore, storage unit 1417p and differentiation element 1418p can prevent that image blur compensation device from starting working suddenly.
Pulse width modulation duty converting unit 1419p is from differentiation element 1418p receiving target value signal.When the voltage of the coil that is applied to image blur compensation device or the value and the camera of electric current rock angle at once, rock angle according to camera and drive correcting lens 1052.The preferred pulse-width-modulation driver of using supplies to the transistorized electric power that is used for drive coil to reduce the power consumption of image blur compensation device thereby save.
Thereby pulse width modulation duty converting unit 1419p changes the coil drive dutycycle according to desired value.For example, when the frequency of width modulation was 20KHz, if the desired value that receives from differentiation element 1418p is " 2048 ", then pulse width modulation duty converting unit 1419p was set at zero with dutycycle, if desired value is " 4096 ", then dutycycle is set at 100.If desired value is greater than " 2048 " and less than " 4096 ", then pulse width modulation duty converting unit 1419p is set at dutycycle an intermediate value of determining suitably according to desired value.In order to determine that subtly dutycycle accurately to carry out image blur correcting, not only needs to consider desired value, but also need to consider current camera condition (for example, temperature, camera orientation and remaining battery power).
Driver element 1420p (for example, traditional pulse-width-modulation driver) receives the output of pulse width modulation duty converting unit 1419p, and exports the drive signal of the coil that will be applied in image blur compensation device, to carry out image blur correcting.After partly pressing shutter release button through 0.2 second the time point (that is, when switch sw1 opens) of time, starting driver element 1420p.
Although the square frame among Figure 34 is not shown,, if the cameraman depresses shutter release button (when switch sw2 opens) fully so that camera begins exposure-processed, then carry out image blur correcting continuously.Therefore, this exemplary embodiment can prevent that camera from rocking, thereby avoids the image quality deterioration of taking.
As long as the cameraman remains on half pressure condition with shutter release button, image blur compensation device just continues to carry out image blur correcting.If the cameraman is from half pressure condition release button, then storage unit 1417p stops to store the output signal (that is, entering sample states) of sensitivity adjusting unit 1416p.Therefore, differentiation element 1418p receives identical signal from sensitivity adjusting unit 1416p with storage unit 1417p.The output signal that differentiation element 1418p produces is zero.Therefore, image blur compensation device can not received the driving desired value, thereby can not carry out image blur correcting.
Integral unit 1415p continues integration operation, till the main switch of camera is closed.If partly press shutter release button once more, storage unit 1417p stores integration output (preserving this signal) again.If the cameraman closes main switch, then rock detecting unit 1045p and quit work, stop the image stabilization sequence.
If the signal of integral unit 1415p is greater than predetermined value, then camera microcomputer 1411 is judged the pan operation (panningoperation) of having carried out camera, and changes the time constant of direct current cut-off filter 1414p.For example, camera microcomputer 1411 abandons can the cutoff frequency scope being equal to or less than the characteristic of the signal content of 0.2Hz, characteristic is reset to the signal content that can the cutoff frequency scope be equal to or less than 1Hz.Therefore, the time constant value is returned initial value in the given time.
In this case, come the change amount of control time constant according to the output of integral unit 1415p.More specifically, if output surpasses first threshold, then with the property settings of direct current cut-off filter 1414p for can the cutoff frequency scope being equal to or less than the signal content of 0.5Hz.If output surpasses second threshold value, then with the property settings of direct current cut-off filter 1414p for can the cutoff frequency scope being equal to or less than the signal content of 1Hz.If output surpasses the 3rd threshold value, then with the property settings of direct current cut-off filter 1414p for can the cutoff frequency scope being equal to or less than the signal content of 5Hz.
When the output of integral unit 1415p is very big (for example, when producing big angular velocity owing to the pan motion of camera), camera microcomputer 1411 resets the operation of integral unit 1415p, to prevent to calculate saturated (overflowing).According to circuit arrangement shown in Figure 34, in computing unit 1047p, provide amplifying unit (direct current cut-off filter) 1048p and amplifying unit (low-pass filter) 1049p.But, amplifying unit 1048p and amplifying unit 1049p can be provided in rocking detecting unit 1045p.
Fig. 1 illustrates the front view according to the image blur compensation device of first exemplary embodiment of the present invention.Fig. 2 illustrates along the sectional view of line A1-A2 truncated picture blur correction device shown in Figure 1.Fig. 3 illustrates along the sectional view of line B-A2 truncated picture blur correction device shown in Figure 1.Fig. 4 illustrates the enlarged drawing of the part of being indicated by C among Fig. 3.
In Fig. 1 to Fig. 4, two correcting lens 10a and 10b have reciprocal focal power to be used for image blur correcting.Correcting lens 10a has positive light coke, and correcting lens 10b has negative power.Retainer 11a keeps correcting lens 10a.Retainer 11b keeps correcting lens 10b.Image blur compensation device also comprises base plate 12.
As shown in Figure 1, retainer 11a comprises the spaced apart pin of the equal angles 14a to 14c with 120 °.The end of three extension spring 15a to 15c is hooked to respectively on the pin 14a to 14c.Retainer 11b comprises the spaced apart pin of the equal angles 14d to 14f (although only showing a pin 14d among Fig. 2 and Fig. 3) with 120 °.The end of extension spring 15d to 15f (although only showing an extension spring 15d among Fig. 2 and Fig. 3) is hooked to respectively on the pin 14d to 14f.As shown in Figure 1, base plate 12 comprises on the front that is arranged on base plate 12 and with 120 ° the spaced apart pin of equal angles 13a to 13c.Another end of extension spring 15a to 15c is hooked to respectively on the pin 13a to 13c.Base plate 12 is included on its back side the spaced apart pin of the equal angles 13d to 13f (although only showing a pin 13d among Fig. 2 and Fig. 3) with 120 °.
Extension spring 15a to 15f is positioned at respectively and is arranged on the pin 14a to 14f on retainer 11a or the 11b and is arranged between the pin 13a to 13f on the base plate 12.As shown in Figures 2 and 3, extension spring 15a to 15f goes up the generation pulling force in the direction (left and right directions among Fig. 2 and Fig. 3) of optical axis 100.
As shown in Figure 1 to Figure 3, between retainer 11a and base plate 12, clip three spheroid 16a to 16c (although only showing out a spheroid 16a among Fig. 2 and Fig. 3).Therefore, the pulling force that produces by extension spring 15a to 15c along the component of optical axis 100 directions to retainer 11a and base plate 12 application of force flexibly.Similarly, between retainer 11b and base plate 12, clip spheroid 16d to 16f (although only showing a spheroid 16d among Fig. 2 and Fig. 3).Therefore, the pulling force that produces by extension spring 15d to 15f along the component of optical axis 100 directions to retainer 11b and base plate 12 application of force flexibly.
Retainer 11a and 11b can move with respect to base plate 12 along arrow 111p, 111y among Fig. 1 and the indicated direction of 111r.But each retainer 11a and 11b are along mobile being restricted of the direction of optical axis 100 direction of the drawing of Fig. 1 (that is, perpendicular to).As shown in Figure 1, extension spring 15a to 15f radially applies necessity and sufficient power to retainer 11a and 11b.Therefore, extension spring 15a to 15f prevents that retainer 11a and 11b from rotating along the indicated direction of arrow 111r.
Because the initial tensile force of each extension spring 15a to 15f radially equally distributes, so cancel out each other along arrow 111p and indicated the mobile of direction of 111y.Therefore, only determine required driving force based on the spring constant (and irrelevant) of extension spring 15a to 15f with the initial tensile force of extension spring 15a to 15f.Therefore, can utilize relative to less power and realize moving along the indicated direction of arrow 111p and 111y.
Shown in Fig. 3 and Fig. 4 (that is, the enlarged drawing of the portion C of Fig. 3), retainer 11a is connected via connecting elements 19a with retainer 11b, and this connecting elements 19a comprises the 19a-a of slip center of rotation portion (spherical portion) that is supported by base plate 12.Connecting elements 19a comprises spherical sliding part 19a-b and the 19a-c that is arranged on its both ends.Retainer 11a and 11b have through hole, and sliding part 19a-b and 19a-c are placed in these through holes, and can slide along the direction of optical axis 100.As according to this exemplary embodiment illustrated in fig. 1, connecting elements 19a and 19b are disposed on the base plate 12, with respect to 100 one-tenth point symmetry relations of optical axis, thereby connecting elements 19a carries out similar action with 19b according to moving of the first lens unit member and the second lens unit member.But if can obtain similar effect, total quantity and their position of connecting elements 19a and 19b are variable.
Thereby, for example, when in perpendicular to the plane of optical axis 100 when the indicated direction of arrow 114a (referring to Fig. 4) drives retainer 11a, the slip center of rotation 19a-a of portion is promoted by sliding part 19a-b.Therefore, the 19a-a of slip center of rotation portion rotates along the 112 indicated directions of the arrow among Fig. 4.Sliding part 19a-c promotes retainer 11b along the indicated direction of arrow 114b (referring to Fig. 4).In this case, sliding part 19a-b and 19a-c can freely slide in the through hole of retainer 11a and 11b.
Therefore, even when the slip center of rotation 19a-a of portion carries out rotational motion, also can under the situation that does not stop retainer 11a and 11b in perpendicular to the plane of optical axis 100, to move, absorb the mobile component on optical axis 100 directions.Connecting elements 19a keeps each correcting lens 10a and 10b (that is, a pair of correcting lens with opposite focal power) in perpendicular to the plane of optical axis, make correcting lens 10a and 10b to move on opposite directions.Although do not illustrate, the structure of connecting elements 19b is similar to connecting elements 19a.Therefore, connecting elements 19b keeps each correcting lens 10a and 10b in perpendicular to the plane of optical axis, makes correcting lens 10a and 10b to move on opposite directions.
As depicted in figs. 1 and 2, coil 18a and 18b (although only showing a coil 18a among Fig. 2) are fixed to the arm of retainer 11a, with the yoke 110a that is fixed to retainer 11b and 110b (although only showing a yoke 110a among Fig. 2) and for example permanent magnet 17a such as neodymium magnet becomes with 17b (although only showing a permanent magnet 17a among Fig. 2) face-to-face to concern. Permanent magnet 17a and 17b are magnetized along its thickness direction, as shown in Figure 2.The flux of permanent magnet 17a and 17b passes coil 18a and the 18b that faces mutually with this permanent magnet along the direction (left and right directions among Fig. 2) that is parallel to optical axis 100.
The following describes the driving mechanism of above-mentioned drive division.As mentioned above, coil 18a and 18b (part of first lens unit) and permanent magnet 17a and 17b (part of second lens unit) constitute drive division with matching.The flux of each permanent magnet 17a and 17b vertically passes coil 18a and 18b.Therefore, if electric current flows through coil 18a, then drive retainer 11a effectively along the indicated direction of arrow 113a among Fig. 1.Similarly, if electric current flows through coil 18b, then drive retainer 11a effectively along the indicated direction of arrow 113b among Fig. 1.
According to the elastic force of extension spring 15a, 15b, 15c, 15d, 15e and 15f (promptly, be derived from the power of spring constant), and the equilibrium relation between the thrust that is produced by the interaction electromagnetic ground between coil 18a and 18b and permanent magnet 17a and the 17b is determined the drive amount of drive division.In other words, can be based on the offset (the image blur correcting amount of correcting lens 10a) of the magnitude of current control correcting lens 10a that flows through coil 18a and 18b.
Fig. 5 is the block scheme that the driving circuit of the driving of controlling correcting lens 10a is shown.Pitching (pitch) desired value 51p and yaw (yaw) desired value 51y are the driving desired values that is used for image blur correcting, drive lens unit with being used to along the direction (pitch orientation) of the arrow 111p shown in Fig. 1 and the direction (yaw direction) of arrow 111y.Pitching desired value 51p and yaw desired value 51y are corresponding with the differentiation element 1418p shown in Figure 34.
Pitching driving force adjustment unit 52p and yaw driving force adjustment unit 52y according to the driving force of each driving direction to the adjustment that gains of the desired value of pitch orientation and yaw direction.The driving circuit 54a of coil 18a (corresponding with pulse width modulation duty converting unit 1419p shown in Figure 34 and drive division 1420p) receives the output of pitching driving force adjustment unit 52p and produces the electric current that will be supplied to coil 18a.The driving circuit 54b of coil 18b (corresponding with pulse width modulation duty converting unit 1419p shown in Figure 34 and drive division 1420p) receives the output of pitching driving force adjustment unit 52p and produces the electric current that will be fed into coil 18b via adding circuit 53b.Just, the signal that drives desired value 51p according to the pitching electric current that supplies to the electric current of coil 18a and supply to coil 18b is homophase and equivalent.
The driving circuit 54b of coil 18b (corresponding with pulse width modulation duty converting unit 1419p shown in Figure 34 and drive division 1420p) receives the output of yaw driving force adjustment unit 52y and produces the electric current that will be fed into coil 18b.The driving circuit 54a of coil 18a (corresponding with pulse width modulation duty converting unit 1419p shown in Figure 34 and drive division 1420p) receives the output of yaw driving force adjustment unit 52y and produces the electric current that will be fed into coil 18a via inverter circuit (inversion circuit) 53a.Just, the signal that drives desired value 51y according to the yaw electric current that supplies to the electric current of coil 18a and supply to coil 18b is inverting each other and equivalent.
When the electric current that supplies to coil 18a with supply to the electric current homophase of coil 18b and during equivalent, coil 18a produces driving force along the indicated direction of arrow 113a, coil 18b produces driving force along the indicated direction of arrow 113b, as shown in Figure 6.Thereby, make a concerted effort to produce the driving force on the direction (pitch orientation) that acts on arrow 113p (arrow 111p).Because two coil 18a and 18b are arranged to rotate mutually the states of 90 degree, so the driving force of Chan Shenging is each driving force of coil 18a and 18b generation in this case
Figure G2009101352168D00201
What produced closes driving force.
When the electric current that supplies to coil 18a with supply to the electric current out-phase of coil 18b and during equivalent, coil 18a produces driving force along the indicated direction of arrow 113a, coil 18b produces driving force along the indicated direction of arrow 113b ' (113b is opposite with arrow), as shown in Figure 7.Therefore, make a concerted effort to produce the driving force that acts on arrow 113y (arrow 111y) direction (yaw direction).Because two coil 18a and 18b are arranged to rotate mutually the states of 90 degree, so the driving force of Chan Shenging is each driving force of coil 18a and 18b generation in this case
Figure G2009101352168D00202
What produced closes driving force.
Pitching driving force adjustment unit 52p and yaw driving force adjustment unit 52y make the eccentric sensitivity of optical system be associated with the rolling dynamic correction value of correcting lens 10a and 10b.
As mentioned above, when electric current flow through coil 18a and 18b, the directional correlation ground driving of the flux that produces with permanent magnet 17a and 17b comprised first lens unit of retainer 11a and correcting lens 10a.Simultaneously, comprise that second lens unit of retainer 11b and correcting lens 10b is subjected to reacting force, in perpendicular to the plane of optical axis 100, be driven along the direction opposite with the moving direction of first lens unit.In this case, must make the elastic of first lens unit and the elastic of second lens unit have identical spring constant.
Connecting elements 19a and 19b have following effect: assist in perpendicular to the plane (perpendicular to the plane of optical axis) of optical axis 100 along driven first lens unit of opposite direction and second lens unit.In Fig. 3, if drive correcting lens 10a (convex lens) along direction " a ", then optical axis since the off-centre of correcting lens 10a and in Fig. 3 upward to deflection.If drive the correcting lens 10b (concavees lens) opposite with the focal power of correcting lens 10a along direction " b ", then optical axis owing to the off-centre of correcting lens 10b in Fig. 3 upward to deflection.Therefore, can be by obtaining big deflection along driven two correcting lens 10a of opposite directions and 10b.Therefore, can realize big image blur correcting by little drive amount.
Under the situation that each lens unit is only supported simply by extension spring 15a to 15f and spheroid 16a to 16f, must make first lens unit identical, thereby prevent optical axis 100 because gravity and off-centre with the weight of second lens unit.But the existence of connecting elements 19a and 19b can reduce the eccentricity issues that the weight by each lens unit causes.Even the weight of first lens unit and second lens unit differs greatly, still can extend to each sliding part 19a-b of being arranged on the connecting elements 19a and two arms of 19a-c by being provided with from the slip center of rotation 19a-a of portion, make their length ratio and the ratio of the weight between two lens units among Fig. 4 inversely proportional, solve this problem.
Utilize above-mentioned configuration, this exemplary embodiment can be by the offset of correcting lens, the skew of the image that abundant minimizing will form on imaging surface, and can realize compact dimensions, the image blur compensation device that power consumption is little.
Fig. 8 illustrates the front view according to the image blur compensation device of second exemplary embodiment of the present invention.Fig. 9 illustrates along the sectional view of the line A3-A4 truncated picture blur correction device shown in Fig. 8.Compare with above-mentioned first exemplary embodiment, second exemplary embodiment uses different structures to connect first lens unit and second lens unit.
In second exemplary embodiment, the support portion comprise extension spring 25a and the 25b that supports first lens unit and be clipped in base plate 22 and retainer 21a and 21b between spheroid 26a to 26f.As shown in Figure 8, retainer 21a comprises pin 24a and the 24b that arranges with 180 ° angle intervals, and the end hook of extension spring 25a and 25b is on pin 24a and 24b.Retainer 21b comprises pin 24d and the 24e (although only showing a pin 24d among Fig. 9) that arranges with 180 ° angle intervals, and the end hook of extension spring 25d and 25e (although only showing an extension spring 25d among Fig. 9) is on pin 24d and 24e.As shown in Figure 8, base plate 22 comprises pin 23a and the 23b that arranges with 180 ° angle intervals, and the other end of extension spring 25a and 25b is hooked in respectively on pin 23a and the 23b.Although do not illustrate among Fig. 8, base plate 22 comprises pin 23d and the 23e (although only showing a pin 23e among Fig. 9) that arranges with 180 ° angle intervals at its back side.
In remaining configuration, second exemplary embodiment is similar to first exemplary embodiment.Although top digit is replaced by " 2 ", indicate second exemplary embodiment with the Reference numeral similar to the Reference numeral that illustrates among Fig. 1 to 4 with first exemplary embodiment in the intimate element of element that illustrates.For example, identical on the correcting lens 20a function with correcting lens 10a.The indicated direction of the indicated direction of arrow 211p, 211y and 211r and arrow 111p, 111y and 111r is identical respectively.
In second exemplary embodiment, first lens unit comprises retainer 21a and correcting lens 20a.Second lens unit comprises retainer 21b and correcting lens 20b.Utilize rope member 210a and 210b (although only showing a rope member 210a among Fig. 9) first lens unit and second lens unit to be connected to each other via roller component 29a that is pivotally mounted to base plate 22 and 29b.
According to example shown in Figure 9,, then spur second lens unit along the indicated direction of arrow 212b by rope member 210a via roller component 29a if first lens unit moves along the indicated direction of arrow 212a among Fig. 9.In this exemplary embodiment, with respect to the axis line of 211p direction roller component 29a and 29b are set symmetrically, make along the dynamic balance of 211y direction.
Utilize above-mentioned configuration, can in perpendicular to the plane of optical axis 200, drive correcting lens 20a and 20b (correcting lens that a pair of focal power is opposite) along opposite directions.
Utilize above-mentioned configuration, this exemplary embodiment can fully reduce the corresponding skew of offset that the weight with correcting lens 20a and 20b of the image that will be formed on the imaging surface causes.When carrying out image blur correcting, just can drive correcting lens 20a and 20b with little driving force.Therefore, this exemplary embodiment can provide compact dimensions, be used for the little image blur compensation device and the picture pick-up device of power consumption of image blur correcting.
Figure 10 illustrates the front view according to the image blur compensation device of the 3rd exemplary embodiment of the present invention.Figure 11 illustrates along the sectional view of the line A5-A6 truncated picture blur correction device shown in Figure 10.Figure 12 A and Figure 12 B illustrate the enlarged drawing of the indicated part of D among Figure 11.Compare with above-mentioned first exemplary embodiment, the 3rd exemplary embodiment uses different structures to connect first lens unit and second lens unit.Although most significant digit is replaced by " 3 ", with Fig. 1 to 4 in the similar Reference numeral of the Reference numeral that illustrates indicate the 3rd exemplary embodiment with first exemplary embodiment in the identical element of element function that illustrates.For example, correcting lens 30a is identical with correcting lens 10a function.The indicated direction of the indicated direction of arrow 311p, 311y and 311r and arrow 111p, 111y and 111r is identical respectively.
In the 3rd exemplary embodiment, first lens unit comprises retainer 31a and correcting lens 30a.Second lens unit comprises retainer 31b and correcting lens 30b.Two connecting elements 39a are connected first lens unit and second lens unit with 39b.
Figure 12 A and 12B show the details of connecting elements 39a.Although Figure 10 is depicted as connecting elements 39a and 39b can see, connecting elements 39a and 39b but are clipped between two retainer 31a and the 31b.
Connecting elements 39a comprises the shaft component 39a-a that is installed to base plate 32, is housed in two sliding part 39a-b and 39a-c and connection part 39a-d in the through hole of retainer 31a and 31b respectively.Connecting elements 39a can rotate around shaft component 39a-a along the 312 indicated directions of the arrow on Figure 12 B drawing.Sliding part 39a-b and 39-c can be free to slide in the through hole of retainer 31a and 31b.Therefore, even carry out rotational motion, still can under the situation that does not stop retainer 31a and 31b in perpendicular to the plane of optical axis 300, to move, absorb the mobile component on optical axis 300 directions around shaft component 39a-a.
The connection part 39a-d of coupling spindle member 39a-a can be along slide perpendicular to the direction of the drawing of Figure 12 B (referring to the arrow among Figure 12 A 313).Therefore, connection part 39a-d can move with respect to moving flexibly of retainer 31a and 31b.
When the indicated direction of arrow 314a shown in Figure 11 drives first lens unit, similar to above-mentioned first exemplary embodiment, second lens unit is subjected to thrust and the reacting force thereof that the interaction electromagnetic ground between coil 38a and the permanent magnet 37a produces, and is driven with the indicated direction of the arrow 314b of the related ground of the mobile phase of connecting elements 39a Figure 11.
Utilize this configuration, can in perpendicular to the plane of optical axis 300, drive correcting lens 30a and 30b (correcting lens that a pair of focal power is opposite) along opposite directions.Mobile first lens unit and second lens unit of preventing of connecting elements 39a rotates along the indicated direction of arrow 311r.Therefore, can be shifted and drive first lens unit and second lens unit preferably.
Utilize above-mentioned configuration, this exemplary embodiment can fully reduce the corresponding skew of offset that the weight with correcting lens 30a and 30b of the image that will be formed on the imaging surface causes.When carrying out image blur correcting, just can drive correcting lens 30a and 30b with a spot of driving force.Therefore, this exemplary embodiment can provide compact dimensions, be used for the little image blur compensation device and the picture pick-up device of power consumption of image blur correcting.
Figure 13 illustrates the front view according to the image blur compensation device of the 4th exemplary embodiment of the present invention.Figure 14 illustrates along the sectional view of the line A7-A8 truncated picture blur correction device shown in Figure 13.Figure 15 A and 15B illustrate the enlarged drawing of the indicated part of E among Figure 14.Compare with above-mentioned first exemplary embodiment, the 4th exemplary embodiment uses different structures to connect first lens unit and second lens unit.Although most significant digit is replaced by " 4 ", with Fig. 1 to 4 in the similar Reference numeral of the Reference numeral that illustrates indicate the 4th exemplary embodiment with first exemplary embodiment in the identical element of element function that illustrates.For example, correcting lens 40a is identical with correcting lens 10a function.The indicated direction of the indicated direction of arrow 411p, 411y and 411r and arrow 111p, 111y and 111r is identical respectively.
In the 4th exemplary embodiment, first lens unit comprises retainer 41a and correcting lens 40a.Second lens unit comprises retainer 41b and correcting lens 40b.Two connecting elements 49a are connected first lens unit and second lens unit with 49b.
Explain connecting elements 49a (as the representative of two connecting elements 49a and 49b) with reference to Figure 15 A and 15B.Although connecting elements 49a shown in Figure 13 and 49b seem visible, connecting elements 49a and 49b but are clipped between two retainer 41a and the 41b.
Connecting elements 49a comprise the shaft component 49a-a that is installed to base plate 42 and with the tooth-strip part meshed gears 49a-b of portion that is arranged on retainer 41a and the 41b.Connecting elements 49a can rotate around shaft component 49a-a along the 412 indicated directions of the arrow on the drawing of Figure 15 B.Because gear part 49a-b can slide (referring to the arrow among Figure 15 A 413) along the direction perpendicular to drawing, so gear part 49a-b can move flexibly with respect to moving of retainer 41a and 41b.
When the indicated direction of arrow 414a drives first lens unit in Figure 14, similar to above-mentioned first exemplary embodiment, second lens unit is subjected to thrust and the reacting force thereof that the interaction electromagnetic ground between coil 48a and the permanent magnet 47a produces, and is driven along the indicated direction of the arrow 414b among Figure 14 explicitly with moving of connecting elements 49a.
Utilize this configuration, can in the plane of optical axis 400, drive correcting lens 40a and 40b (correcting lens that a pair of focal power is opposite) in vertical along opposite directions.Mobile first lens unit and second lens unit of preventing of connecting elements 49a rotates along the indicated direction of arrow 411r.Therefore, can be shifted and drive first lens unit and second lens unit fully.
Utilize above-mentioned configuration, this exemplary embodiment can fully reduce the corresponding skew of offset that the weight with correcting lens 40a and 40b of the image that will be formed on the imaging surface causes.When carrying out image blur correcting, just can drive correcting lens 40a and 40b with a spot of driving force.Therefore, this exemplary embodiment can provide compact dimensions, be used for the little image blur compensation device and the picture pick-up device of power consumption of image blur correcting.
Figure 16 illustrates the front view according to the image blur compensation device of the 5th exemplary embodiment of the present invention.Figure 17 illustrates along the sectional view of the line A9-A10 truncated picture blur correction device shown in Figure 16.Figure 18 illustrates the enlarged drawing of the indicated part of F among Figure 17.Compare with above-mentioned first exemplary embodiment, the 5th exemplary embodiment uses different structures to connect first lens unit and second lens unit.Although most significant digit is replaced by " 5 ", with Fig. 1 to 4 in the similar Reference numeral of the Reference numeral that illustrates indicate the 5th exemplary embodiment with first exemplary embodiment in the identical element of element function that illustrates.For example, correcting lens 50a is identical with correcting lens 10a function.The indicated direction of the indicated direction of arrow 511p, 511y and 511r and arrow 111p, 111y and 111r is identical respectively.
In the 5th exemplary embodiment, first lens unit comprises retainer 51a and correcting lens 50a.Second lens unit comprises retainer 51b and correcting lens 50b.Three connecting elements 59a, 59b are connected first lens unit and second lens unit with 59c.
Describe connecting elements 59b (as the representative of three connecting elements 59a, 59b and 59c) in detail with reference to Figure 18.Although connecting elements 59a, 59b shown in Figure 16 and 59c seem visible, connecting elements 59a, 59b and 59c but are clipped between two retainer 51a and the 51b.
Connecting elements 59b be be arranged on base plate 52 on the spherical component that connects of spherical connection part, and connecting elements 59b is sandwiched between the rubber component 510b and 510e that is arranged on retainer 51a and the 51b.When the arrow 512 indicated directions of connecting elements 59b on the drawing of Figure 18 were rotated, the enough big friction force that acts between connecting elements 59b and rubber component 510b and the 510e moved retainer 51a and 51b in perpendicular to the plane of optical axis 500.
When the indicated direction of arrow 514a in Figure 17 drives first lens unit, similar to above-mentioned first exemplary embodiment, second lens unit is subjected to thrust and the reacting force thereof that the interaction electromagnetic ground between coil 58a and the permanent magnet 57a produces, and is driven along the indicated direction of arrow 514b explicitly with moving of connecting elements 59a.
Utilize this configuration, can in perpendicular to the plane of optical axis 500, drive correcting lens 50a and 50b (correcting lens that a pair of focal power is opposite) along opposite directions.
Utilize above-mentioned configuration, this exemplary embodiment can fully reduce the corresponding skew of offset that the weight with correcting lens 50a and 50b of the image that will be formed on the imaging surface causes.When carrying out image blur correcting, can enough a spot of drive force correcting lens 50a and 50b.Therefore, this exemplary embodiment can provide compact dimensions, be used for the little image blur compensation device and the picture pick-up device of power consumption of image blur correcting.Can replace rubber component 510b and 510e by any other member of the friction force that can between connecting elements and first lens unit and second lens unit, produce q.s according to this exemplary embodiment.As possibility, can carry out partial operation to first lens unit and second lens unit, to produce friction force.
Figure 19 illustrates the front view according to the image blur compensation device of the 6th exemplary embodiment of the present invention.Figure 20 illustrates along the sectional view of the line A11-A12 truncated picture blur correction device shown in Figure 19.Figure 21 A and 21B illustrate the enlarged drawing of the indicated part of G among Figure 20.Compare with above-mentioned first exemplary embodiment, the 6th exemplary embodiment uses different structures to connect first lens unit and second lens unit.Although most significant digit is replaced by " 6 ", with Fig. 1 to 4 in the similar Reference numeral of the Reference numeral that illustrates indicate the 6th exemplary embodiment with first exemplary embodiment in the identical element of element function that illustrates.For example, correcting lens 60a is identical with correcting lens 10a function.The indicated direction of the indicated direction of arrow 611p, 611y and 611r and arrow 111p, 111y and 111r is identical respectively.
In the 6th exemplary embodiment, first lens unit comprises retainer 61a and correcting lens 60a.Second lens unit comprises retainer 61b and correcting lens 60b.Three connecting elements 69a, 69b are connected first lens unit and second lens unit with 69c.
Describe connecting elements 69b (as the representative of three connecting elements 69a, 69b and 69c) in detail with reference to Figure 21 A and 21B.
Connecting elements 69b comprises: be arranged on the shaft component 69b-a on the base plate 62; Be arranged on two sliding axle 69b-c and 69b-d on retainer 61a and the 61b; And rotor plate 69b-b.Rotor plate 69b-b can rotate around shaft component 69b-a.
Be arranged on sliding axle 69b-c on each retainer 61a and the 61b and 69b-d and connect (referring to Figure 21 A) with slotted hole on being arranged on rotor plate 69b-b.Therefore, if retainer 61a moves forward along the direction perpendicular to drawing, then rotor plate 69b-b rotates along the 612 indicated directions (counterclockwise) of the arrow among Figure 21 A, and retainer 61b is moved backward along the direction perpendicular to drawing.In this case, rotor plate 69b-b can be free to slide with respect to the sliding axle 69b-c and the 69b-d that are arranged on each retainer 61a and the 61b.Therefore, even carry out rotational motion around shaft component 69-a, also can be under the situation that does not stop retainer 61a and 61b in perpendicular to the plane of optical axis 600, to move, the mobile component on the direction of absorption optical axis 600.
When the indicated direction of arrow 614a in Figure 20 drives first lens unit, similar to above-mentioned first exemplary embodiment, second lens unit is subjected to thrust and the reacting force thereof that the interaction electromagnetic ground between coil 68a and the permanent magnet 67a produces, and is driven along the indicated direction of arrow 614b explicitly with moving of connecting elements 69a.
As shown in figure 19, connecting elements 69a, 69b and 69c slidably and arrange with 120 ° equal angles around first lens unit and second lens unit at interval. Connect structure member 69a, 69b and 69c and have slotted hole, axle can slide along described slotted hole. Connecting elements 69a, 69b and 69c make first lens unit that comprises correcting lens 60a and comprise that second lens unit of correcting lens 60b moves along opposite directions.
Utilize this configuration, can in perpendicular to the plane of optical axis 600, drive correcting lens 60a and 60b (correcting lens that a pair of focal power is opposite) along opposite directions.
Utilize above-mentioned configuration, this exemplary embodiment can fully reduce the corresponding skew of offset that the weight with correcting lens 60a and 60b of the image that will be formed on the imaging surface causes.When carrying out image blur correcting, can enough a spot of drive force correcting lens 60a and 60b.Therefore, this exemplary embodiment can provide compact dimensions, be used for the little image blur compensation device and the picture pick-up device of power consumption of image blur correcting.
According to above-mentioned first to the 6th exemplary embodiment, connect first lens unit and second lens unit by connecting portion, win lens unit and second lens unit can be moved along opposite directions in the plane perpendicular to optical axis.For example, according to first exemplary embodiment, connecting elements 19a and 19b also comprise the absorbent portion 19a-b and the 19a-c of the mobile component on the absorbing light direction of principal axis, produce this mobile component when connecting elements 19a and 19b rotate with respect to first lens unit and second lens unit.Therefore, thus opposite correcting lens 10a of two focal powers that this exemplary embodiment can utilize coordinated driving to move along opposite directions in perpendicular to the plane of optical axis 100 and 10b realize image blur correcting.
More specifically, move along opposite directions in the plane perpendicular to optical axis in order to ensure focal power pair of opposite correcting lens, two correcting lenses are by mechanical connection each other in each above-mentioned exemplary embodiment.Thereby, to compare with the situation that only drives a correcting lens, the image blur correcting amount is double.In other words, these exemplary embodiment only need the drive amount of half just can obtain suitable ambiguity correction amount.
For example, correcting lens 10a and 10b (a pair of correcting lens) are owing to the weight of extension spring 15a to 15c causes offset along equidirectional.But because correcting lens 10a and 10b have opposite focal power, the image blur correcting effect that the offset of same amount causes can be cancelled out each other.Therefore, correcting lens 10a that is caused by the weight of correcting lens 10a and 10b and the offset of 10b do not have substantial effect to the offset that is formed on the image on the imaging surface.
In addition, the physical construction that is used to connect correcting lens 10a and 10b can fully reduce the size of the offset that correcting lens 10a and 10b cause.Because drive correcting lens 10a and 10b in the plane mutually, can reduce the size of required mechanism.
Utilize above-mentioned configuration, this exemplary embodiment can fully reduce the corresponding skew of offset that image and weight correcting lens that will be formed on the imaging surface causes.This exemplary embodiment can realize compact dimensions, be used for the little image blur compensation device of power consumption of image blur correcting.
Figure 22 illustrates the front view that will be provided in the image blur compensation device in the digital camera (picture pick-up device) according to the 7th exemplary embodiment of the present invention.Figure 23 illustrates along the sectional view of the line A13-A14 truncated picture blur correction device shown in Figure 22.Figure 24 illustrates along the sectional view of the line A13-H1 truncated picture blur correction device shown in Figure 22.Although most significant digit is replaced by " 7 ", with Fig. 1 to 4 in the similar Reference numeral of the Reference numeral that illustrates indicate the 7th exemplary embodiment with first exemplary embodiment in the identical element of element function that illustrates.For example, correcting lens 70a is identical with correcting lens 10a function.The indicated direction of the indicated direction of arrow 711p, 711y and 711r and arrow 111p, 111y and 111r is identical respectively.
In Figure 22 to 24, the focal power of two correcting lens 70a and 70b is opposite each other to be used for image blur correcting.Correcting lens 70a has positive light coke.Correcting lens 70b has negative power.Two retainer 71a and 71b keep correcting lens 70a and 70b respectively.Image blur compensation device also comprises base plate 72.
Retainer 71a comprises that the end of extension spring 75a to 75c is hooked to respectively on three pin 74a to 74c with spaced apart three the pin 74a to 74c of 120 ° equal angles.Retainer 71b comprises the spaced apart pin of the equal angles 74d to 74f (although only showing a pin 74d among Figure 23) with 120 °, and the end of extension spring 75d to 75f (although only showing an extension spring 75d among Figure 23) is hooked to respectively on the pin 74d to 74f.Base plate 72 comprises that the other end of extension spring 75a to 75c is hooked to respectively on three pin 73a to 73c with spaced apart three the pin 73a to 73c of 120 ° equal angles.Although do not illustrate in Figure 22, base plate 72 is included in the back side with spaced apart three the pin 73d to 73f of 120 ° equal angles (although only showing a pin 73d among Figure 23).
Extension spring 75a to 75f is set at respectively between the pin 73a to 73f of the pin 74a to 74f of retainer 71a and 71b and base plate 72.As shown in figure 23, extension spring 75a to 75f produces along the pulling force of direction (left and right directions among Figure 23) effect of optical axis 700.As shown in figure 23, spheroid 76a to 76c (although Figure 23 only shows a spheroid 76a) is sandwiched between retainer 71a and the base plate 72.The pulling force that extension spring 75a to 75c produces along the component of optical axis direction to retainer 71a and base plate 72 application of force flexibly.
Retainer 71a and 71b can move with respect to base plate 72 along arrow 711p among Figure 22 and the indicated direction of 711y.But each retainer 71a and 71b are restricted along the mobile of direction of optical axis 700.As shown in figure 22, extension spring 75a to 75f radially applies necessity and sufficient power to retainer 71a and 71b.Therefore, extension spring 75a to 75f prevents that retainer 71a and 71b from rotating along the indicated direction of arrow 711r.
When arrow 711p and the indicated direction of 711y move because each extension spring 75a to 75f radially equivalent distribute, the initial tensile force of each extension spring 75a to 75f is cancelled out each other.Therefore, only determine required driving force (and irrelevant) with their initial tensile force based on the spring constant of extension spring 75a to 75f.Therefore, can utilize relative to less power and realize moving along the indicated direction of arrow 711p and 711y.
As Figure 23 and shown in Figure 24, coil 78a is fixed to the arm that is arranged on the retainer 71a, becomes relation face-to-face with yoke 710a that is fixed to retainer 71b and permanent magnet (for example, neodymium magnet) 77a.As shown in figure 24, coil 78b is fixed to the arm that is arranged on the retainer 71b, becomes relation face-to-face with yoke 710b that is fixed to retainer 71a and permanent magnet (for example, neodymium magnet) 77b.
Shown in Figure 23 and 24, permanent magnet 77a and 77b are magnetized along their thickness direction.Coil 78a and 78b be positioned at separately permanent magnet 77a and the opposite face of 77b, the flux of each permanent magnet 77a and 77b passes coil 78a and 78b respectively along the direction (along the left and right directions among Figure 23 and Figure 24) that is parallel to optical axis 700.
Retainer 71a and correcting lens 70a constitute first lens unit.Retainer 71b and correcting lens 70b constitute second lens unit.In addition, spheroid 76a to 76f and extension spring 75a to 75f constitute resiliency supported portion.In addition, the collaborative formation of coil 78a and permanent magnet 77b (constituting the part of first lens unit) and coil 78b and permanent magnet 77a (constituting the part of second lens unit) drive division.
Utilize this configuration, if the weight of correcting lens 70a and correcting lens 70b about equally, then first lens unit and second lens unit is equal in weight.The offset that the offset that the weight of first lens unit causes can cause with the weight of second lens unit equates.
The following describes the driving mechanism of above-mentioned drive division.
As mentioned above, drive division comprises coil 78a and permanent magnet 77b (constituting the part of first lens unit) and coil 78b and permanent magnet 77a (constituting the part of second lens unit).The flux that permanent magnet 77a and 77b produce vertically passes coil 78a and 78b respectively.Therefore, if electric current flows through coil 78a, as shown in figure 22, then drive retainer 71a effectively along the indicated direction of arrow 713a.Similarly, if electric current flows through coil 78b, then drive retainer 71a effectively along the indicated direction of arrow 713b.
Equilibrium relation between the thrust that produces according to the elastic force (that is, being derived from the power of spring constant) of extension spring 75a, 75b, 75c, 75d, 75e and 75f and by the interaction electromagnetic ground between coil 78a and 78b and permanent magnet 77a and the 77b is determined the drive amount of drive division.In other words, can be based on the offset of the magnitude of current control correcting lens 70a that flows through coil 78a and 78b.
Driving circuit shown in Fig. 5 also is applicable to the driving of control correcting lens 70a.
Pitching desired value 51p and yaw desired value 51y will be used for driving along the direction (yaw direction) of the direction (pitch orientation) of arrow 711p and arrow 711y the driving desired value of each lens unit (correcting lens).Pitching desired value 51p and yaw desired value 51y are corresponding with the differentiation element 1418p shown in Figure 34.Pitching driving force adjustment unit 52p and yaw driving force adjustment unit 52y according to the driving force of pitching driving direction and yaw driving direction to the adjustment that gains of the desired value on pitch orientation and the yaw direction.
The driving circuit 54a of coil 78a (corresponding with pulse width modulation duty converting unit 1419p shown in Figure 34 and drive division 1420p) receives the output of pitching driving force adjustment unit 52p, and produces the electric current that will be fed into coil 78a.The driving circuit 54b of coil 78b (corresponding with pulse width modulation duty converting unit 1419p shown in Figure 34 and drive division 1420p) receives the output of pitching driving force adjustment unit 52p via adding circuit 53b, and produces the electric current that will be fed into coil 78b.Just, the signal that drives desired value 51p according to the pitching electric current that supplies to the electric current of coil 78a and supply to coil 78b is homophase and equivalent.
When the electric current that supplies to coil 78a with supply to the electric current homophase of coil 78b and during equivalent, as shown in Figure 6, coil 78a produces driving force along the indicated direction of arrow 113a, and coil 78b produces driving force along the indicated direction of arrow 113b.Therefore, make a concerted effort to produce driving force (referring to arrow 113p) on the direction (pitch orientation) that acts on arrow 711p.Because two coil 78a and 78b are arranged to rotate mutually the states of 90 degree, so the driving force of Chan Shenging is each driving force of coil 78a and 78b generation in this case
Figure G2009101352168D00341
What produced closes driving force.
When the electric current that supplies to coil 78a with when supplying to the anti-phase and equivalent of the electric current of coil 78b, as shown in Figure 7, coil 78a produces driving force along the indicated direction of arrow 113a, and coil 78b produces driving force along the indicated direction of arrow 113b ' (113b is opposite with arrow).Therefore, make a concerted effort to produce driving force (referring to arrow 113y) on the direction (yaw direction) that acts on arrow 711y.Because two coil 78a and 78b are arranged to rotate mutually the states of 90 degree, the driving force of Chan Shenging is each driving force of coil 78a and 78b generation in this case
Figure G2009101352168D00342
What produced closes driving force.
Driving force adjustment unit 52p and 52y make the eccentric sensitivity of optical system be associated with the rolling dynamic correction value of correcting lens 70a and 70b.
As mentioned above, when electric current flow through coil 78a and 78b, the directional correlation ground driving of the flux that produces with permanent magnet 77a and 77b comprised first lens unit of retainer 71a and correcting lens 70a.Simultaneously, comprise that second lens unit of retainer 71b and correcting lens 70b is subjected to the reacting force of this driving force, along being driven perpendicular to the opposite direction of the moving direction in the plane of optical axis 700 with first lens unit.Just, when the indicated direction of the arrow in Figure 24 " 714a " drove first lens unit, second lens unit moved along the indicated reverse direction of arrow " 714b ".In this case, must make the elastic of first lens unit and the elastic of second lens unit have equal spring constant.
Utilize above-mentioned configuration, if drive correcting lens 70a (convex lens) along the direction among Figure 24 " 714a ", then optical axis since eccentric and in Figure 24 upward to deflection.If drive the focal power correcting lens 70b (concavees lens) opposite with the focal power of correcting lens 70a along direction " 714b ", then optical axis since off-centre and in Figure 24 upward to deflection.Therefore, can obtain big deflection by two correcting lens 70a and the 70b that drives along opposite direction.Thereby, can be by the ambiguity correction of the big image of little drive amount realization.
Utilize above-mentioned configuration, this exemplary embodiment can fully reduce the corresponding skew of the caused offset of the weight with correcting lens 70a and 70b of the image that will be formed on the imaging surface.In other words, this exemplary embodiment can be carried out desirable image blur correcting.This exemplary embodiment can provide compact dimensions, be used for the little image blur compensation device and the picture pick-up device of power consumption of image blur correcting.
When optical design was suitable, when correcting lens was offset owing to gravity, the offset direction of correcting lens 70a and 70b (that is, the absolute value of a pair of focal power equates and the opposite correcting lens of direction) can be offset.Therefore, this exemplary embodiment can be eliminated the problem of contingent imaging skew in the image blur compensation device that only comprises a correcting lens.
Figure 25 illustrates the front view according to the image blur compensation device of the 8th exemplary embodiment of the present invention.Figure 26 illustrates along the sectional view of the line A15-A16 truncated picture blur correction device shown in Figure 25.Although most significant digit is replaced by " 8 ", with the similar Reference numeral of Reference numeral illustrated in fig. 22 the 8th exemplary embodiment is shown with the 7th exemplary embodiment in the identical element of element function that illustrates.For example, correcting lens 80a is identical with correcting lens 70a function.The indicated direction of the indicated direction of arrow 811p, 811y and 811r and arrow 711p, 711y and 711r is identical respectively.
In Figure 25 and 26, the focal power of correcting lens 80a and 80b is opposite each other to be used for image blur correcting.Two retainer 81a and 81b keep correcting lens 80a and 80b respectively.Image blur compensation device according to this exemplary embodiment also comprises base plate 82.The 8th exemplary embodiment is preferred for the weight of correcting lens 80a and the unequal situation of weight of correcting lens 80b (more specifically, when correcting lens 80a is heavier than correcting lens 80b).
In the 8th exemplary embodiment, retainer 81a and correcting lens 80a constitute first lens unit.Retainer 81b and correcting lens 80b (lighter than correcting lens 80a) constitute second lens unit.In addition, spheroid 86a to 86f and extension spring 85a to 85f constitute the support portion.
In the 8th exemplary embodiment, as shown in figure 25, two coil 88a and 88b are set to the part of first lens unit.Two permanent magnet 87a that weight ratio coil 88a and 88b are heavy and 87b are configured to the part of second lens unit.Two coil 88a and 88b and two permanent magnet 87a and 87b be collaborative to constitute drive division.
Utilize above-mentioned configuration, this exemplary embodiment can reduce the weight difference of first lens unit that comprises correcting lens 80a (heavier than correcting lens 80b) and second lens unit that comprises permanent magnet 87a and 87b (heavier than coil 88a and 88b).Therefore, the caused offset of weight of first lens unit is equated with the caused offset of the weight of second lens unit.
Utilize above-mentioned configuration, this exemplary embodiment can fully reduce the corresponding skew of offset that the weight with correcting lens 80a and 80b of the image that will be formed on the imaging surface causes.In other words, this exemplary embodiment can be carried out desirable image blur correcting.This exemplary embodiment can provide compact dimensions, be used for the little image blur compensation device and the picture pick-up device of power consumption of image blur correcting.
Illustrated identical in the mechanism of the drive division in this exemplary embodiment and the configuration of support portion and first exemplary embodiment, therefore in this no longer repeat specification.
Figure 27 illustrates the front view according to the image blur compensation device of the 9th exemplary embodiment of the present invention.Figure 28 illustrates along the sectional view of the line A17-A18 truncated picture blur correction device shown in Figure 27.Figure 29 illustrates along the sectional view of the line A17-H2 truncated picture blur correction device shown in Figure 27.Figure 30 illustrates along the sectional view of the line J-A18 truncated picture blur correction device shown in Figure 27.Figure 31 A and 31B illustrate the enlarged drawing of the indicated part of K among Figure 30.Although most significant digit is replaced by " 9 ", with indicate the 9th exemplary embodiment with the similar Reference numeral of Reference numeral illustrated in fig. 22 with the 7th exemplary embodiment in the identical element of element function that illustrates.For example, correcting lens 90a is identical with correcting lens 70a function.The indicated direction of the indicated direction of arrow 911p, 911y and 911r and arrow 711p, 711y and 711r is identical respectively.
In Figure 27 to Figure 31, the focal power of correcting lens 90a and 90b is opposite each other to be used for image blur correcting.Two retainer 91a and 91b keep correcting lens 90a and 90b respectively.Image blur compensation device according to this exemplary embodiment also comprises base plate 92.
In the 9th exemplary embodiment, retainer 91a and correcting lens 90a constitute first lens unit.Retainer 91b and correcting lens 90b constitute second lens unit.In addition, spheroid 96a to 96f and extension spring 95a to 95f constitute the support portion.As the coil 98a of the part of first lens unit, as the coil 98b of the part of second lens unit and be arranged on the base plate 92 and constitute drive division with coil 98a and 98b permanent magnet 97a and 97b into face-to-face relationship.
Utilize this configuration, when the weight of the weight of correcting lens 90a and correcting lens 90b about equally the time, the weight of first lens unit can equal the weight of second lens unit.
Shown in Figure 30,31A and 31B, retainer 91a is connected via connecting elements 99a with retainer 91b, and this connecting elements 99a comprises the sphere slip center of rotation 99a-a of portion that is supported by base plate 92.Connecting elements 99a also is included in two the spherical sliding part 99a-b and the 99a-c at place, two end.Sliding part 99a-b and 99a-c can freely slide along the direction of optical axis 900 in the through hole of retainer 91a and 91b.The configuration of another connecting elements 99b is identical with the configuration of connecting elements 99a.
For example, when in perpendicular to the plane of optical axis 900 when the indicated direction of arrow 914a (referring to Figure 31 B) drives retainer 91a, the slip center of rotation 99a-a of portion is promoted by sliding part 99a-b, and rotates along arrow 912 indicated directions.Another sliding part 99a-c promotes retainer 91b along the indicated direction of arrow 914b.
In this case, sliding part 99a-b and 99a-c can freely slide in the through hole of retainer 91a and 91b.Therefore, even produce rotational motion around the slip center of rotation 99a-a of portion, also can be under the situation that does not stop retainer 91a and 91b in perpendicular to the plane of optical axis 900, to move, the mobile component on the absorbing light direction of principal axis.Connecting elements 99a and 99b keep correcting lens 90a and 90b (correcting lens that a pair of focal power is opposite), and it can be moved along opposite directions in the plane perpendicular to optical axis 900.
Identical with the 7th exemplary embodiment, according to coil 98a and 98b (part of first lens unit and second lens unit) and be arranged on permanent magnet 97a on the base plate 92 and the interaction between the 97b, drive division moves first lens unit and second lens unit in perpendicular to the plane of optical axis 900.
According to above-mentioned configuration, this exemplary embodiment can reduce the corresponding skew of offset that the weight with correcting lens 90a and 90b of the image that will be formed on the imaging surface causes effectively.This exemplary embodiment can provide compact dimensions, be used for the little image blur compensation device and the picture pick-up device of power consumption of image blur correcting.
Because magnet 97a and 97b are set on the base plate 92, so this exemplary embodiment can reduce the general assembly (TW) of drive division.Because at first lens unit that comprises correcting lens 90a with comprise in second lens unit of correcting lens 90b and include the coil that can move in one direction, so this exemplary embodiment can keep the weight balancing of two lens units.
According to above-mentioned the 7th to the 9th exemplary embodiment, can realize image blur correcting by in perpendicular to the plane of optical axis, moving the opposite correcting lens of a pair of focal power along opposite directions.Can be obvious from each exemplary embodiment, move along opposite directions in plane in order to make the opposite correcting lens of a pair of focal power reliably perpendicular to optical axis, two lens unit weight that include correcting lens and retainer are identical.
Thereby, to compare with the situation that only drives a correcting lens, the image blur correcting amount is double.In other words, these exemplary embodiment only need the drive amount of half just can obtain suitable ambiguity correction amount.
For example, a pair of correcting lens is offset along the equidirectional occurrence positions owing to the weight of extension spring.But because the focal power of correcting lens is opposite, the image blur correcting effect that the offset of equal quantities produces can be cancelled out each other.Therefore, the offset that causes of the weight of correcting lens can not produce substantial effect to the offset that is formed on the image on the imaging surface.In addition, as mentioned above, because the weight of two correcting lenses or lens unit is about equally, so can reduce the caused offset of weight of two correcting lenses or lens unit.
When driving correcting lens mutually in the plane, can reduce the size of required mechanism.
In above-mentioned exemplary embodiment, each lens unit can move along the direction perpendicular to optical axis.But, only otherwise can make the performance of image blur compensation device become too poor, be not to move just perpendicular to optical axis.The example that illustrates in the above-mentioned exemplary embodiment is the image blur compensation device that is assemblied in the digital camera.But application of the present invention is not limited to digital camera.Another exemplary embodiment of the present invention can be implemented as the compact stabilization element that is applicable to any other picture pick-up device, and these other camera heads are digital camera, monitoring camera or IP Camera for example.The present invention can also be applicable to portable terminal, for example binocular (binocular) or portable phone, and the present invention can also be used for the polarizing appliance that contains in the reduced projection type exposure device (stepper) of semiconductor element manufacturing installation or other optical devices or the aberration correction (aberration correction) of optical axis wheelwork.
Although with reference to exemplary embodiment the present invention has been described, should understand, the invention is not restricted to disclosed exemplary embodiment.The scope of appending claims meets the most wide in range explanation, to comprise all distortion, equivalent structure and function.

Claims (26)

1. image stabilizing device, it comprises:
First lens unit, this first lens unit comprises first correcting lens;
Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens;
Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis;
Driver element, this driver element be configured to along described direction perpendicular to described optical axis drive described first lens unit and described second lens unit the two;
Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device;
Rock correcting unit, this rocks correcting unit and is configured to based on described output of rocking detecting unit drive signal be offered described driver element, to proofread and correct described rocking; And
Linkage unit, this linkage unit are configured to described first lens unit of mechanical connection and described second lens unit;
Wherein, described linkage unit is configured to: described linkage unit can make described first lens unit and described second lens unit move along opposite directions in the plane perpendicular to described optical axis by described first lens unit of described drive unit drives and described second lens unit time, and described linkage unit can be eliminated the mobile mobile component on the direction of described optical axis that causes by described first lens unit and described second lens unit.
2. image stabilizing device according to claim 1, it is characterized in that, the electromagnetic component that is used as the part of described driver element is installed to described first lens unit, and another electromagnetic component that is used as another part of described driver element is installed to described second lens unit.
3. image stabilizing device according to claim 1, it is characterized in that, described driver element comprises coil and magnet, described coil and described magnet can produce magnetic force when electric current flows through described coil, side in described coil and the described magnet is installed to described first lens unit, the opposing party in described coil and the described magnet is installed to described second lens unit
Described driver element is configured to, and when electric current flow through described coil, described driver element drove described first lens unit and described second lens unit along opposite directions.
4. image stabilizing device according to claim 1 is characterized in that, described linkage unit is the member that has spherical sliding part at two place, end, and described spherical sliding part is connected with described second lens unit with described first lens unit respectively.
5. image stabilizing device according to claim 1 is characterized in that, also comprises fixed component, and described support unit is installed to this fixed component,
Wherein, described linkage unit is the member with spherical slip center of rotation portion and spherical sliding part of two ends that are positioned at described linkage unit,
Described slip center of rotation portion has the core that is fixed to described fixed component, and described slip center of rotation portion can rotate around described core, and described spherical sliding part is connected respectively to described first lens unit and described second lens unit.
6. image stabilizing device according to claim 1 is characterized in that, described linkage unit be configured in described perpendicular to the plane of described optical axis in respect to point-symmetric each other position, the center of described optical axis.
7. image stabilizing device according to claim 1 is characterized in that, also comprises fixed component, and described support unit is installed to this fixed component,
Wherein, described linkage unit is the rope that connects described first lens unit and described second lens unit, and this rope engages so that pulling force to be provided with described fixed component.
8. image stabilizing device according to claim 7 is characterized in that, described rope connects described first lens unit and described second lens unit via the roller component that is pivotally mounted to described fixed component.
9. image stabilizing device according to claim 1, it is characterized in that, described linkage unit is the member that has discoid sliding part at two place, end, and described discoid sliding part is connected respectively to described first lens unit and described second lens unit.
10. image stabilizing device according to claim 1 is characterized in that, also comprises fixed component, and described support unit is installed to this fixed component,
Wherein, described linkage unit comprises the discoid sliding part at discoid slip center of rotation portion and the place, two ends that is positioned at this linkage unit,
Described slip center of rotation portion has the core that is fixed to described fixed component, and can rotate around this core, and described discoid sliding part is connected respectively to described first lens unit and described second lens unit.
11. image stabilizing device according to claim 1 is characterized in that, described linkage unit is the gear of described first lens unit of mechanical connection and described second lens unit.
12. image stabilizing device according to claim 1 is characterized in that, also comprises fixed component, described support unit is installed to this fixed component,
Wherein, described linkage unit is the gear of described first lens unit of mechanical connection and described second lens unit, and this gear has the center of rotation that is fixed to described fixed component, and can rotate around this center of rotation.
13. image stabilizing device according to claim 1 is characterized in that, also comprises fixed component, described support unit is installed to this fixed component,
Wherein, described linkage unit is the spherical component that connects with described fixed component and contact with described second lens unit with described first lens unit.
14. image stabilizing device according to claim 13, it is characterized in that, described first lens unit and described second lens unit comprise rubber component, and described rubber component is set at the position that contacts with described spherical component of described first lens unit and described second lens unit.
15. image stabilizing device according to claim 1 is characterized in that, also comprises fixed component, described support unit is installed to this fixed component,
Wherein, described linkage unit is the board member of described first lens unit of mechanical connection and described second lens unit,
Described board member connects with described first lens unit and described second lens unit, and described board member is pivotally mounted to described fixed component.
16. a picture pick-up device, it comprises:
Image stabilizing device, this image stabilizing device comprises:
First lens unit, this first lens unit comprises first correcting lens;
Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens;
Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis;
Driver element, this driver element be configured to along described direction perpendicular to described optical axis drive described first lens unit and described second lens unit the two;
Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device;
Rock correcting unit, this rocks correcting unit and is configured to based on described output of rocking detecting unit drive signal be offered described driver element, to proofread and correct described rocking; And
Linkage unit, this linkage unit are configured to described first lens unit of mechanical connection and described second lens unit;
Wherein, described linkage unit is configured to: described linkage unit can make described first lens unit and described second lens unit move along opposite directions in the plane perpendicular to described optical axis by described first lens unit of described drive unit drives and described second lens unit time, and described linkage unit can be eliminated the mobile mobile component on the direction of described optical axis that causes by described first lens unit and described second lens unit.
17. an optical device, it comprises:
Image stabilizing device, this image stabilizing device comprises:
First lens unit, this first lens unit comprises first correcting lens;
Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens;
Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis;
Driver element, this driver element be configured to along described direction perpendicular to described optical axis drive described first lens unit and described second lens unit the two;
Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device;
Rock correcting unit, this rocks correcting unit and is configured to based on described output of rocking detecting unit drive signal be offered described driver element, to proofread and correct described rocking; And
Linkage unit, this linkage unit are configured to described first lens unit of mechanical connection and described second lens unit;
Wherein, described linkage unit is configured to: described linkage unit can make described first lens unit and described second lens unit move along opposite directions in the plane perpendicular to described optical axis by described first lens unit of described drive unit drives and described second lens unit time, and described linkage unit can be eliminated the mobile mobile component on the direction of described optical axis that causes by described first lens unit and described second lens unit.
18. an image stabilizing device, it comprises:
First lens unit, this first lens unit comprises first correcting lens;
Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens;
Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis;
First coil, this first coil is fixed to described first lens unit;
First magnet, this first magnet is fixed to described first lens unit;
Second coil, this second coil is fixed to described second lens unit;
Second magnet, this second magnet is fixed to described second lens unit;
Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; And
Rock correcting unit, this rocks correcting unit and is configured to by current supply is arrived described first coil and described second coil, to proofread and correct described rocking;
Wherein, the relation that described first coil and described first magnet are configured to face with each other, the relation that described second coil and described second magnet are configured to face with each other makes described first lens unit and described second lens unit to move along opposite directions in the plane perpendicular to described optical axis.
19. image stabilizing device according to claim 18 is characterized in that, described first lens unit and the described second lens unit quality equate.
20. an image stabilizing device, it comprises:
First lens unit, this first lens unit comprises first correcting lens;
Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens;
Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis;
First coil, this first coil is fixed to described first lens unit;
Second coil, this second coil is fixed to described first lens unit;
First magnet, this first magnet is fixed to described second lens unit;
Second magnet, this second magnet is fixed to described second lens unit;
Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; And
Rock correcting unit, this rocks correcting unit and is configured to drive signal is offered described first coil and described second coil to proofread and correct described rocking;
Wherein, the relation that described first coil and described first magnet are configured to face with each other, the relation that described second coil and described second magnet are configured to face with each other makes described first lens unit and described second lens unit to move along opposite directions in the plane perpendicular to described optical axis.
21. image stabilizing device according to claim 20 is characterized in that, described first lens unit and the described second lens unit quality equate.
22. an image stabilizing device, it comprises:
First lens unit, this first lens unit comprises first correcting lens;
Second lens unit, this second lens unit comprises second correcting lens, the focal power of this second correcting lens is opposite with the focal power of described first correcting lens;
Support unit, this support unit are configured to support along optical axis direction described first lens unit and described second lens unit arranged side by side, make described first lens unit and described second lens unit to move independently along the direction perpendicular to described optical axis;
Fixed component, described support unit are installed and are arrived this fixed component;
First coil, this first coil is fixed to described first lens unit;
Second coil, this second coil is fixed to described second lens unit;
First magnet and second magnet, described first magnet and described second magnet are fixed to described fixed component;
Rock detecting unit, this rocks detecting unit and is configured to detect and is applied to rocking of described image stabilizing device; And
Rock correcting unit, this rocks correcting unit and is configured to drive signal is offered driver element to proofread and correct described rocking;
Linkage unit, this linkage unit is configured to described first lens unit of mechanical connection and described second lens unit, wherein, the relation that described first coil and described first magnet are configured to face with each other, the relation that described second coil and described second magnet are configured to face with each other makes described first lens unit and described second lens unit to move along opposite directions in the plane perpendicular to described optical axis;
Wherein, described second coil of described first coil of described first lens unit, described second lens unit and described first magnet and described second magnet that are arranged on the described fixed component constitute described driver element.
23. image stabilizing device according to claim 22 is characterized in that, described first lens unit and the described second lens unit quality equate.
24. image stabilizing device according to claim 22 is characterized in that, described linkage unit is the member that has spherical sliding part at two place, end, and described spherical sliding part is connected respectively to described first lens unit and described second lens unit.
25. image stabilizing device according to claim 22 is characterized in that,
Described linkage unit is the member with the spherical slip center of rotation portion and the spherical sliding part at the place, two ends that is positioned at described linkage unit,
Described slip center of rotation portion has the core that is fixed to described fixed component, and can rotate around described core, and described spherical sliding part is connected respectively to described first lens unit and described second lens unit.
26. image stabilizing device according to claim 22 is characterized in that, described linkage unit be configured in described perpendicular to the plane of described optical axis in respect to point-symmetric each other position, the center of described optical axis.
CN2009101352168A 2008-04-16 2009-04-16 Image stabilizing device, camera apparatus and optical equipment Expired - Fee Related CN101561617B (en)

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CN116299941B (en) * 2023-05-24 2023-08-08 武汉理工大学 Lens driving device
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