JP4164313B2 - camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera with a camera shake correcting function capable of improving the ability of camera shake correction by increasing a moving amount in a specified direction by installing a camera shake correction means so that it may be inclined by an optional angle considering the character of the camera from a vertical direction. <P>SOLUTION: The camera is provided with angular velocity detection means (physical sensors 21y and 21p) incorporated in a camera body (camera main body) 11 and detecting an angular velocity around two axes orthogonal to a Z-axis (optical axis), an arithmetic calculation means 17 calculating camera shake correction amount based on the angular velocity around the two axes (X-axis and Y-axis) detected by the angular velocity detection means, and at least two camera shake correction means (camera shake correction devices 23a and 23b) performing camera shake correcting operation in the specified direction based on the camera shake correction amount arithmetically calculated by the arithmetic calculation means 17. Then, two of the camera shake correction means are installed so that they may be inclined by 45 degrees from the vertical direction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Technology to which the invention belongs]
The present invention is, for example, a digital still camera or a video camera provided with a camera shake correction function.ofRelated to the camera.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a camera that forms an image of a subject on a light receiving surface of an image sensor by a photographing optical system and converts the image into an electric signal is known as a video camera or a digital still camera.
[0003]
For example, in a digital still camera as shown in FIG. 7A, a photographing lens 2 is provided on the front surface of the camera body 1, and a release button 3 is provided on the upper surface of the camera body 1. In the state of FIG. 7A, the camera shake state of the camera body 1 will be described with the left-right direction of the camera body 1 as the X axis, the vertical direction of the camera body 1 as the Y axis, and the optical axis direction of the photographing lens 2 as the Z axis. .
[0004]
Such a digital still camera is difficult to realize a short shutter time such as a silver halide photograph due to the sensitivity limit of the image sensor, and blurs such as “image flow” are likely to occur in an image captured due to camera shake.
[0005]
For this reason, as shown in FIG. 7B, the conventional digital camera is provided with a camera shake detection sensor 4 for detecting camera shake in the yaw direction, and with a camera shake detection sensor 5 for detecting camera shake in the pitch direction. It is conceivable that camera shake information in the yaw direction and pitch direction is detected from the sensors 4 and 5 and the camera shake is corrected based on the camera shake information. In FIG. 7B, reference numeral 6 denotes a two-dimensional solid-state imaging device (imaging means) such as an area CCD.
[0006]
In the above-described camera shake correction, the angular velocities around the 2 (X axis, Y axis) axes fixed to the camera are usually detected by the sensors 4 and 5, and the “tilt angle due to camera shake” of the cameras around the two axes is detected. The correction lens (not shown) included in the photographic optical system including the photographic lens 2 is displaced, the direction of the optical axis is adjusted, and the image pickup element 6 is moved ( (Rotation control in the yaw direction and the pitch direction). In this case, a driven system element such as a correction lens has a mechanism that moves on two axes parallel to the vertical direction and the horizontal direction.
[0007]
[Problems to be solved by the invention]
However, as shown in FIG. 8, the amount of shake and the shake direction of human hand shake differ between the yaw direction and the pitch direction. In addition, the camera shake varies depending on various conditions such as the form of the camera and the holding state of the camera.
[0008]
For example, FIGS. 9A and 9B show the state of camera shake when images are actually taken many times using a horizontally thin camera. In FIGS. 9A and 9B, a large number of curves indicate camera shake states at the time of photographing. Further, FIG. 9A shows horizontal shake, and FIG. 9B shows vertical shake.
[0009]
From the graphs of FIGS. 9A and 9B, it can be clearly seen that the direction of occurrence of shaking varies depending on the holding state of the camera.
[0010]
Therefore, it is desirable to increase the amount of movement in a specific direction and improve the ability of camera shake correction by tilting the camera shake correction unit from the vertical direction by an arbitrary angle considering the characteristics of the camera.
[0011]
  This invention increases the amount of movement in a specific direction and improves the ability of camera shake correction by tilting the camera shake correction means from the vertical direction by an arbitrary angle considering the features of the camera.RuThe purpose is to provide a camera.
[0012]
[Means for Solving the Problems]
  In order to achieve this object, a first aspect of the present invention is a camera in which an image of a subject is formed on a light receiving surface of an image sensor by a photographing optical system, and is converted into an electrical signal. Angular velocity detection means for detecting angular velocities around two axes orthogonal to the axis, calculation means for calculating a camera shake correction amount based on the angular velocities around the two axes detected by the angular velocity detection means, and the calculation means And at least two camera shake correction means for performing a camera shake correction operation in a predetermined direction based on the camera shake correction amount calculated by
  AboveTwo of the camera shake correction means are respectively inclined at a predetermined angle from the vertical direction, and based on a predetermined operation of the camera or a judgment function inside the camera,The direction in which the camera shake increases is determined, and the correction amount in the determined direction is increased.From a certain angleThe installation angle of the camera shake correction means isIt is characterized by a changing camera.
[0013]
  In order to achieve the above object, the invention of claim 22. The camera according to claim 1, wherein two of the camera shake correction means are respectively inclined by 45 degrees from the vertical direction.It is a camera.
[0014]
  In order to achieve the above object, the invention of claim 32. The camera according to claim 1, wherein two of the camera shake correction means are installed at a predetermined angle smaller than 45 degrees from the vertical direction.It is a camera.
[0015]
  Moreover, invention of Claim 4 is described in any one of Claims 1-3.ofIn the camera, the angular velocity axis detected by the angular velocity sensor is orthogonal to the correction directions of the two camera shake correction means.
[0016]
  Moreover, invention of Claim 5 is described in any one of Claims 1-4.ofIn the camera, the camera shake correction unit is an image sensor translation adjustment unit that adjusts the displacement of the image sensor in a translational direction in a direction parallel to the light receiving surface.
[0017]
  Further, the invention of claim 6 is described in any one of claims 1 to 4.ofIn the camera, the camera shake correction unit is a correction lens driving unit that displaces one or more correction lenses included in the photographing optical system in a direction orthogonal to the optical axis.
[0018]
  Furthermore, invention of Claim 7 is described in any one of Claims 1-4.ofIn the camera, the camera shake correction means is composed of a variable apex angle prism provided on the optical axis of the photographing optical system and a variable apex angle prism driving means for changing the apex angle of the variable apex angle prism. Features.
[0019]
  Further, the invention of claim 8 is a claim.Any one of 1-7Described inofIn the camera, the predetermined operation of the camera means that one of a plurality of shooting modes of the camera is selected by the mode selection unit, and the installation angle of the camera shake correction unit is shot according to the shooting mode selected by the mode selection unit. It is characterized by changing to an angle suitable for the mode.
[0020]
  Further, the invention of claim 9 is a claim.Any one of 1-7Described inofIn the camera, the determination function inside the camera determines how to hold the camera from the camera attitude detection signal detected by the camera attitude detection means, and installs the camera shake correction means according to the direction of the camera holding direction. It is characterized by varying the angle.
[0021]
Further, the invention of claim 10 is a claim.Any one of 1-7Described inofIn the camera, the determination function inside the camera is to determine the amount of camera shake detected by the camera shake detection means when the camera is held or when the release button is half-pressed, and to change the installation angle of the camera shake correction means. It is characterized by that.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Constitution]
FIG. 1 is a diagram for explaining one embodiment in the case of implementing a digital camera (shooting apparatus) with a camera shake correction function of the present invention.
[0023]
In FIG. 1, 11 is a camera body (camera body) of the digital camera, 12 is a photographing lens provided on the front side of the camera body 11, and 13 is a release button. The release button 13 is a two-stage push button. When the release button 13 is pressed halfway, camera shake information is detected as will be described later. In addition, when the release button 13 is fully pressed, shooting is performed.
[0024]
Here, when the camera body 11 is horizontal as shown in FIG. 1, the left-right direction of the camera body 11 is the X axis, the vertical direction of the camera body 11 is the Y axis, the optical axis direction of the photographing lens 2 is the Z axis, and the X axis. An axis line of 45 ° with respect to the Y axis will be described as tilt axes O1 and O2.
[0025]
In this camera body 11, an image pickup means (photographing means) 14 as shown in FIGS. The imaging means 14 includes an imaging control board 15 and a two-dimensional individual imaging element (imaging element) 16 such as a CCD as imaging means provided (mounted) on the imaging control board 15.
[0026]
The imaging control board 15 is connected to an exposure control means 18 that is controlled by a computing means (arithmetic control circuit) 17. The arithmetic means 17 controls the operation of the exposure control means 18 and controls the exposure of the image pickup control board 15 to pick up an image. The arithmetic means 17 controls the imaging control board 15 to scan a large number of pixels of the two-dimensional individual image pickup device 16 and take out the video signal from the two-dimensional individual image pickup device 16. Since a well-known configuration can be adopted as the configuration of the imaging control board 15 for controlling the two-dimensional individual imaging element 16, detailed description thereof is omitted.
[0027]
The imaging control board 15 is held by brackets 11a and 11b of the camera body 11 via elastic bodies 19 and 20. The arrangement positions of the elastic bodies 19 and 20 are arranged at an angular position of 45 ° with respect to the X axis and the Y axis passing through the center of the two-dimensional individual image pickup device 16 (the optical axis of the photographing lens 12). Accordingly, the imaging control board 15 is supported in the camera body 11 by the elastic body 19 so as to be rotatable around the tilt axis O1, and is also rotatable by the elastic body 20 around the tilt axis O2. Is supported within.
[0028]
In addition, as shown in FIGS. 3 and 4, camera shake detection means 21 is attached in the camera body 11. This hand shake detection means 21 includes a physical quantity sensor (angular velocity sensor 1 as an angular velocity detection means) 21y such as a gyro sensor (piezoelectric vibration gyro) that detects a shake amount in the yaw direction, and a gyro sensor that detects a shake amount in the pitch direction. A physical quantity sensor (angular velocity sensor 2 as an angular velocity detecting means) 21p such as a piezoelectric vibration gyro) and a shake detection sensor circuit 22 that amplifies and filters the detection outputs of the physical sensors 21y and 21p are provided.
[0029]
In addition, the image pickup control board 15 is subjected to shake correction by the shake correction unit 23. The camera shake correction unit 23 includes the elastic bodies 19 and 20 described above, a camera shake correction device (first camera shake correction unit) 23a that controls the rotation of the lower left oblique edge of the imaging control board 15 about the tilt axis O1, and an imaging. A camera shake correction device (second camera shake correction means) 23b that controls the rotation of the upper right edge of the control board 15 about the tilt axis O2 is provided.
[0030]
The camera shake correction devices 23a and 23b are held at positions in the camera body 1 (not shown). Further, the camera shake correction devices 23a and 23b include a piezoelectric element and a displacement enlarging mechanism that mechanically enlarges the thickness change of the piezoelectric element. The lever principle is used for this displacement enlarging mechanism. Further, the piezoelectric elements of the camera shake correction devices 23a and 23b are driven and controlled by a correction means driving means (correction means driving circuit) 24. The operation of the correcting means driving means 24 is controlled by the calculating means 17.
[0031]
In FIG. 2, the physical sensors (angular velocity sensors 1, 2) 21y and 21p are drawn on the X and Y axes, respectively, for convenience of explanation. The angular velocity sensor is not necessarily on the axis on which the angular velocity is to be detected. It is not always installed.
[0032]
As the physical sensors (angular velocity sensors 1, 2) 21y, 21p, piezoelectric vibration gyros or the like can be used as described above. As shown in FIG. 3, the outputs of the physical sensors (angular velocity sensors 1, 2) 21y, 21p are sent (inputted) to the computing means 17. The calculation means 17 is constituted by a “microprocessor” or the like, calculates a “camera shake correction amount” in accordance with inputs from the physical sensors (angular velocity sensors 1 and 2) 21y and 21p, and sends (inputs) it to the camera shake correction means 23. The camera shake correction unit 24 drives the image pickup unit 14 in accordance with the amount of camera shake correction to reduce the influence of camera shake.
[Action]
Next, the operation of the digital camera having such a configuration will be described.
[0033]
When the photographer holds the above-described camera body 11 and performs shooting, camera shake occurs in the pitch direction around the X axis and the yaw direction around the Y axis. At this time, the shake amount in the yaw direction is detected as an angular velocity in the yaw direction by the physical sensor (angular velocity sensor 1) 21y, and the shake amount in the pitch direction is detected as an angular velocity in the pitch direction by the physical sensor (angular velocity sensor 2) 21p.
[0034]
The physical sensors 21y and 21p output the detected detection signals and input them to the calculation means 17. The calculation means 17 calculates a “camera shake correction amount” in accordance with inputs from the physical sensors 21 y and 21 p, and sends a control signal corresponding to the “camera shake correction quantity” to the correction means drive means 24 of the camera shake correction means 23. input. The correction means driving means 24 applies a control voltage to the piezoelectric elements (not shown) of the camera shake correction devices 23a and 23b based on the input control signal.
[0035]
As a result, the piezoelectric elements of the camera shake correction apparatuses 23a and 23b change in thickness, and the thickness change of the piezoelectric elements is controlled by an imaging mechanism through an enlargement mechanism that applies the lever principle (not shown) of the camera shake correction apparatuses 23a and 23b. It is transmitted to the substrate 15. Thereby, the imaging control board 15 is rotationally driven around the tilt axis O1 by the camera shake correction device 23a, and is rotationally driven around the tilt axis O2 by the camera shake correction device 23b. In this manner, the camera shake correction unit 23 drives the imaging unit 14 to be displaced around the tilt axes O1 and O2 in accordance with the camera shake correction amount, thereby reducing the influence of camera shake.
[0036]
FIG. 5 shows the direction in which an image pickup device such as a CCD is translated by the conventional camera shake correction means, and FIG. 6 shows the direction in which the image pickup element 16 such as a CCD is translated by the camera shake correction means 23. is there. In FIG. 5, the correction range of the image sensor is a range indicated by A and B, and in FIG. 6, the correction range of the image sensor 16 is a range indicated by A1 and B1. Comparing the correction ranges of the image sensor shown in FIGS. 5 and 6, the correction ranges A1 and B1 of the image sensor 16 shown in FIG. 6 are about 1.4 times the correction ranges A and B of the image sensor shown in FIG.
[0037]
According to the embodiment of the invention described above, an image of a subject is formed on the light receiving surface of the image sensor (two-dimensional solid-state image sensor 16) by the photographing optical system including the photographing lens 2, and converted into an electrical signal. In the camera to be captured, angular velocity detection means (physical sensors 21y, 21p) that are incorporated in the camera body (camera body 11) and detect angular velocities around two axes (X axis, Y axis) orthogonal to the optical axis, Based on the angular velocities around the two axes (X axis and Y axis) detected by the angular velocity detection means (physical sensors 21y and 21p), the calculation means 17 for calculating the amount of camera shake correction is calculated by the calculation means 17. Based on the camera shake correction amount, the camera has at least two camera shake correction means (camera shake correction apparatuses 23a and 23b) that perform a camera shake correction operation in a predetermined direction, and the camera shake correction means (camera shake correction apparatuses 23a and 23b). Tilted 45 degrees from the 2 turn, each vertically has a configuration which is installed out of).
[0038]
When the camera shake correction means is installed at an angle of 45 degrees from the vertical direction, the vertical and horizontal correction areas are about 1.4 times larger than the diagonal direction, as shown in FIG. On the other hand, the area in the diagonal direction is reduced, but considering that the camera is supported with both hands, it is difficult to move in the diagonal direction. Therefore, it can be said that it is effective to install the camera shake correction means at 45 degrees.
(Modification 1)
In the above-described embodiment, the two camera shake correction units (camera shake correction devices 23a and 23b) are each inclined by 45 degrees from the vertical direction. However, the present invention is not necessarily limited to this configuration. For example, the two camera shake correction means (camera shake correction devices 23a and 23b) may be installed at a predetermined angle smaller than 45 ° from the vertical direction.
[0039]
This can be understood with reference to FIG. That is, FIG. 9 is a graph showing the actual state of camera shake, in which camera shake is plotted when several monitors photograph a horizontally thin camera. In FIG. 9, the horizontal axis indicates time, and the vertical axis indicates the angle of camera shake. Moreover, (a) in FIG. 9 is a vertical camera shake, and (b) is a horizontal camera shake. As is apparent from FIG. 9, it can be seen that the camera shake in the vertical direction is large.
[0040]
In such a case, it can be estimated that the effect increases if the amount of correction in the vertical direction is large. For this purpose, two camera shake correction means (camera shake correction devices 23a and 23b) are installed at a predetermined angle smaller than 45 ° from the vertical direction.
[0041]
By doing so, there is an effect of preventing camera shake in a camera in which the amount of correction of camera shake in the vertical direction increases and the camera shake in the vertical direction tends to increase.
(Modification 2)
In addition, the two camera shake correction means (camera shake correction devices 23a and 23b) are respectively inclined at a predetermined angle from the vertical direction, and have a predetermined operation of the camera or a determination function inside the camera (inside the camera body 11). Based on the (determination function by the calculation means 17), it can also be set to be changed from a predetermined angle of the camera (camera body 11).
[0042]
In this case, the camera shake correction means 23 is provided so as to be adjustable in inclination with respect to the X axis and the Y axis, the tilt adjustment means of the camera shake correction means 23 is provided, and the tilt adjustment means is calculated according to the tilt of the camera body 11. By controlling the operation of the camera body 11, it is preferable to adjust the tilt of the camera shake correction unit 23 with respect to the X axis and the Y axis according to the tilt of the camera body 11.
[0043]
In this way, since the installation angle of the two camera shake correction means is changed based on a predetermined operation by the user or a determination function inside the camera, more appropriate camera shake correction can be performed.
[0044]
Next, a specific example of a predetermined operation by the user or an angle setting of the camera shake correction unit by a determination function inside the camera will be described.
(i) Angle setting of camera shake correction means 23 by predetermined operation of camera
Here, the predetermined operation of the camera means that, for example, the camera has a plurality of shooting modes and any one of the shooting modes is selected.
[0045]
As this shooting mode, for example, there is a shooting mode based on how the camera is held (camera posture). In addition, in the shooting mode depending on how the camera is held, for example, a normal way of holding the camera body 11 of the camera sideways (normal shooting with the shooting screen being landscape), and a camera body 11 being portrait (portrait image is portrait). It is conceivable to hold the camera body 11 at an angle. The camera shake state varies depending on how the camera body 11 is held.
[0046]
Accordingly, the camera body (camera body) 11 is provided with a mode button (mode selection means) for selecting such a camera holding method, that is, a shooting mode, and a shooting mode depending on how the camera is held is selected by this mode button or the like. Then, a shooting mode depending on how the camera is held may be set, and the camera shake correction means 23 may be tilted by the tilt adjusting means at an angle corresponding to the camera holding mode. That is, in this way, the installation angle of the camera shake correction unit 23 may be changed to a (suitable) angle corresponding to the shooting mode depending on how the camera is held. By doing in this way, the effect of camera shake correction can be improved. Note that changing the installation angle can also be included in the predetermined operation.
[0047]
In this case, more appropriate shooting can be performed by changing the installation angle of the camera shake correction unit 23 so that the correction amount in the direction in which the camera shake becomes larger is increased depending on the form (posture) of the camera.
[0048]
When releasing (photographing) with the camera held in the vertical or horizontal direction in this way, the direction in which camera shake becomes larger depending on the camera form (posture) can be selected by selecting the mode with the mode button of the camera. By changing the installation angle of the camera shake correction unit 23 so that the amount increases, more appropriate shooting can be performed.
(ii) Setting of the installation angle of the camera shake correction means 23 by the judgment function inside the camera 1
The determination function inside the camera means a determination function by the calculation means 17 in the camera body 11. As a determination function by the calculation means 17, a function of determining the posture of the camera (camera body 11) can be provided.
[0049]
Here, as the posture at the time of shooting of the camera, as described above, for example, a normal holding method in which the camera body 11 of the camera is held sideways (normal shooting in which the shooting screen is horizontally long), and the camera body 11 is held vertically (shot image) Or vertically), a method of holding the camera body 11 at an angle, and the like. The camera shake state varies depending on how the camera body 11 is held.
[0050]
Therefore, in order to determine the posture of such a camera, a camera posture detection means (camera posture detection sensor) is provided in the camera body 11, and the camera (camera body 11) is held by the camera posture detection means. In other words, the camera posture detection means outputs a camera posture detection signal, and the camera posture detection signal is input to the calculation means 17.
[0051]
Then, the calculation means 17 is set so as to determine the orientation of the camera (camera body 11), the orientation, etc. from the input camera orientation detection signal.
[0052]
In addition, when the calculation unit 17 determines the camera posture from the camera posture detection signal detected by the camera posture detection unit, the calculation unit 17 changes the tilt adjustment unit to the camera posture so that appropriate camera shake correction can be performed according to the camera posture. In response to the operation control, the installation angle of the camera shake correction unit 23 may be automatically changed according to the posture of the camera. Note that the determination function inside the camera can include automatically changing the installation angle of the camera shake correction means 23 according to the posture of the camera.
[0053]
In this case, more appropriate shooting can be performed by changing the installation angle of the camera shake correction unit 23 so that the correction amount in the direction in which the camera shake becomes larger is increased depending on the form (posture) of the camera.
[0054]
When releasing (photographing) with the camera held in the vertical or horizontal direction in this way, the direction in which camera shake becomes larger depending on the camera form (posture) can be selected by selecting the mode with the mode button of the camera. By changing the installation angle of the camera shake correction unit 23 so that the amount increases, more appropriate shooting can be performed.
(iii) Setting of the installation angle of the camera shake correction means 23 by the judgment function inside the camera 2
Further, the determination function inside the camera means a determination function by the calculation means 17 in the camera body 11 as described above. As a determination function by the calculation means 17, it is possible to provide a function for determining the amount of camera shake detected when the camera is held or when the release button is half pressed, that is, what kind of camera shake information is.
[0055]
As described above, for example, a normal way of holding the camera body 11 of the camera horizontally (normal shooting where the shooting screen is horizontally long), a way of holding the camera body 11 vertically (photographed image is vertically long), and a slant of the camera body 11 It can be considered how to prepare for. The camera shake state varies depending on how the camera body 11 is held.
[0056]
It is also possible to detect the shake information in such a shake state and change the installation angle of the shake correction means based on the shake information.
[0057]
That is, a camera holding state detection sensor (camera posture detection means) is provided in the camera body 11 to detect the holding state of the camera body 11 or when the release button 3 is half-pressed, the physical sensor 21y. , 21p, the camera shake amount may be measured, and appropriate setting may be made by automatically changing the installation angle of the camera shake correction means 23 so that camera shake correction can be performed appropriately. Note that the determination function inside the camera can include automatically changing the installation angle of the camera shake correction means 23 according to the posture of the camera.
[0058]
Usually, when taking a picture with the camera body (camera) 11 with both hands, it is predicted that the shake in the vertical direction and the horizontal direction is common and the shake in the oblique direction is small from the positional relationship of the hand supporting the camera body 11. The Therefore, for example, when the camera shake correction unit 23 is installed at an angle of 45 degrees from the vertical direction as shown in FIGS. 2 and 4, a driven body (for example, the image sensor 16 or the imaging optical system) driven by the camera shake correction unit 23 is installed. The maximum movement amount of the correction lens included in the lens and the variable vertex prism provided on the optical axis of the photographing optical system) can be about 1.4 times the movement amount in the oblique direction. Directional correction is increased. In addition, the amount of correction in a specific direction can be increased by arbitrarily changing the inclination.
(iV) When the camera shake in a specific direction is large depending on the form of the camera (how to hold it) as described above, the camera shake correction means can be installed at an arbitrary angle from the vertical direction to prevent the camera shake in the specific direction. The effect will increase.
(Other 1)
As described above, the axes of the angular velocities (X axis and Y axis) detected by the two angular velocity sensors (physical sensors 21y and 21p) are the correction directions of the two camera shake correction means (the camera shake correction devices 23a and 23b). By making the configurations orthogonal to each other, the calculation for calculating the correction amount becomes easy.
(Other 2)
Further, as described above, the camera shake correction means (the camera shake correction devices 23a and 23b) is an image sensor translational adjustment means that adjusts the displacement of the image sensor (two-dimensional solid-state image sensor 16) in a direction parallel to the light receiving surface. It is.
[0059]
However, although the image pickup element 16 is driven to be displaced by the camera shake correction unit 23, it is not necessarily limited to this configuration.
[0060]
For example, the camera shake correction unit may be a correction lens driving unit that displaces one or more correction lenses included in a photographing optical system having the photographing lens 2 in a direction orthogonal to the optical axis. In this case, the camera shake correction devices 23a and 23b can be used as the camera shake correction means.
[0061]
The camera shake correction means includes a variable apex angle prism (not shown) provided on the optical axis of the taking optical system having the taking lens 2 and variable apex angle prism driving means for changing the apex angle of the variable apex angle prism. You may comprise by. In this case, the camera shake correction devices 23a and 23b can be used as the camera shake correction means.
[0062]
In this way, even if the image is corrected by the camera shake correction means, even if the correction lens included in the photographic optical system or the variable top prism provided on the optical axis of the photographic optical system, the two-dimensional solid-state imaging device 16 is corrected for camera shake. The same effect as that obtained when the camera shake is corrected by the means can be obtained.
[0063]
Further, when the camera shake correction in the direction parallel to the light receiving surface of the image sensor 16 is performed by the swing of the image sensor 16 or the displacement of the correction lens or the variable apex angle prism, the mechanism of the camera shake correction means is simplified. Is done.
[0064]
Alternatively, the camera shake correction in the direction parallel to the light receiving surface of the image sensor 16 can be performed separately for the swing of the image sensor 16 and the displacement of the correction lens or the variable apex angle prism. Also in this case, the mechanism of the camera shake correction means is simplified.
[0065]
【The invention's effect】
  As described above, in the camera of claim 1,Two of the camera shake correction means are each inclined at a predetermined angle from the vertical direction, andPredetermined camera operationOrBased on the judgment function inside the camera,Since the installation angle of the camera shake correction means changes from the predetermined angle so as to determine the direction in which camera shake increases and the correction amount in the determined direction increases.More appropriate camera shake correction can be performed.
[0066]
  Claim 2ofIn the camera, the two camera shake correction means are 45 from the vertical direction.Every timeBecause it is installed at an angle,The amount of camera shake correction in the vertical and horizontal directions is about 1.4 times the amount of movement of the correction means.
[0067]
  Furthermore, claim 3ofIn the cameraSince the two camera shake correction means are installed at an angle smaller than 45 degrees from the vertical direction, the amount of correction of the camera shake in the vertical direction becomes large, and this is effective in a camera that tends to increase the camera shake in the vertical direction.
[0068]
  Claim 4ofIn the camera, since the axis of the angular velocity sensor and the correction direction of the camera shake correction means are orthogonal, it is easy to calculate the correction amount.
[0069]
  Claims 5, 6, and 7Described inIn the camera, when the camera shake correction in the direction parallel to the light receiving surface of the image sensor is performed by the swing of the image sensor or the displacement of the correction lens or the variable apex angle prism, the mechanism of the camera shake correction means is simplified.
[0070]
  Further, claim 8.ofIn the camera, the mode button is used to select the way the camera is held at the time of release, and the installation angle of the camera shake correction means is determined accordingly, so that more appropriate camera shake correction can be performed.
[0071]
  Claim 9ofIn the camera, a camera installed inside the camera detects how to hold the camera and determines the installation angle of the camera shake correction means according to the detection method, so that more appropriate camera shake correction can be performed.
[0072]
  Claim 10ofIn the camera, the sensor installed in the camera detects the amount of camera shake while holding the camera or the release button is pressed halfway, and determines the installation angle of the camera shake correction means according to this. Appropriate image stabilization can be performed.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a camera with a camera shake correction function according to the present invention.
FIG. 2 is an explanatory diagram showing an example of an image pickup unit and a camera shake correction unit arranged in the camera body of FIG.
FIG. 3 is a block diagram (control circuit diagram) for controlling the camera shake correction unit of FIG. 2;
4 is an explanatory diagram of camera shake correction means and a control circuit in FIGS. 2 and 3. FIG.
FIG. 5 is an explanatory diagram showing a correction range of an image sensor by a conventional camera shake correction unit.
FIG. 6 is an explanatory diagram showing a relationship between a correction range of an image sensor by a conventional camera shake correction unit and a correction range of a bill holder by a camera shake correction unit of the present invention.
7A is a schematic perspective view of a camera with a camera shake correction function having a conventional camera shake correction unit, and FIG. 7B is an explanatory diagram showing a simplified system of an image sensor in the camera body and a camera shake detection unit in FIG. FIG.
8 is an explanatory diagram (graph) showing an example of a change in camera shake amount of the camera in FIG. 7;
9A is an explanatory view showing a large number of shakes in the horizontal direction (yaw direction) of the camera of FIG. 7 displayed simultaneously, and FIG. 9B is a view showing shakes of the camera of FIG. 7 in the vertical direction (pitch direction). It is explanatory drawing which displayed and showed many simultaneously.
[Explanation of symbols]
11 ... Camera body (Camera body)
14: Imaging means
16 ... Two-dimensional solid-state imaging device (imaging device)
17 ... Calculation means
21. Hand shake detection means
21y, 21p ... physical sensor (angular velocity detection means)
23. Shake correction means
23a, 23b ... shake correction device (shake correction means)
24 ... Correcting means driving means

Claims (10)

In a camera in which an image of a subject is formed on a light receiving surface of an image sensor by an imaging optical system and converted into an electrical signal, the angular velocity around two axes orthogonal to the optical axis is detected. An angular velocity detecting means, a calculating means for calculating a camera shake correction amount based on the angular velocities around the two axes detected by the angular velocity detecting means, and a camera shake in a predetermined direction based on the camera shake correction amount calculated by the calculating means. Having at least two camera shake correction means for performing a correction operation;
Two are are inclined each a given angle from the vertical direction, and based on a predetermined operation of the camera or camera inside the determination function determines the direction in which the camera shake is large, the correction amount of the determined direction of the camera shake correction means The camera is characterized in that an installation angle of the camera shake correction means is changed from the predetermined angle so that the angle becomes larger . 2. The camera according to claim 1, wherein two of the camera shake correction means are respectively inclined at 45 degrees from the vertical direction . 2. The camera according to claim 1, wherein two of the camera shake correcting means are installed at a predetermined angle smaller than 45 degrees from the vertical direction . A camera according to any one of claims 1 to 3, the camera angular velocity of the shaft angular velocity sensor detects is you characterized in that to correct the direction and each orthogonal the two shake correction means. 5. The camera according to claim 1, wherein the camera shake correction unit is an image sensor translational adjustment unit that translates and adjusts the image sensor in a direction parallel to the light receiving surface. camera that. 5. The camera according to claim 1, wherein the camera shake correction unit is a correction lens driving unit that displaces one or more correction lenses included in the photographing optical system in a direction orthogonal to the optical axis. the camera said. 5. The camera according to claim 1, wherein the camera shake correction unit includes a variable apex angle prism provided on an optical axis of the photographing optical system, and a variable that changes an apex angle of the variable apex angle prism. camera you characterized in that it is constituted by the apex angle prism drive means. The camera according to any one of claims 1 to 7, wherein the predetermined operation of the camera is selected by the mode selection unit and one of a plurality of shooting modes of the camera is selected by the mode selection unit. der Ru camera that installation angle of the camera shake correction means in accordance with the shooting mode is changed to the angle that is suitable for shooting mode. The camera according to any one of claims 1 to 7, wherein the determination function inside the camera determines how to hold the camera from a camera attitude detection signal detected by the camera attitude detection means, and Holding der Ru camera to a setting angle varying of the shake correction means in accordance with the direction of. In the camera according to any one of claims 1 to 7, the determination function inside the camera determines the amount of camera shake detected by the camera shake detection means when the camera is held or the release button is half pressed, der Ru camera changing the installation angle of the camera shake correction means.

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