JP6808370B2 - Lens barrel and optical equipment with it - Google Patents

Description

The present invention relates to a lens barrel and an optical device having the lens barrel.

Conventionally, a lens barrel having a tilt mechanism for tilting the lens, a shift mechanism for translating the lens, and a revolving mechanism for rotating the lens is known as a tilt lens barrel. When shooting with a lens barrel equipped with such a tilted lens barrel, it is common to fix it on a tripod, etc., but you should shoot by hand depending on the place or subject where you cannot spend time shooting. There are also many.

Here, in order to prevent a blurred image due to camera shake during shooting, a lens barrel equipped with a vibration isolation mechanism, a tilt mechanism or a shift mechanism, and a revolving mechanism that shifts at least a part of the photographing optical system is provided. It is disclosed in Patent Document 1. A lens barrel equipped with an anti-vibration mechanism is generally provided with a shake detection sensor that detects vibration, and the image shake correction lens group of the vibration isolation mechanism is moved in the direction orthogonal to the optical axis based on the detection signal of the vibration detection sensor. The camera shake is corrected by making it.

Japanese Unexamined Patent Publication No. 2011-87076

However, Patent Document 1 does not mention a fixed portion of the image shake detecting means, and mentions a drive (drive direction and drive amount) corrected in consideration of the presence of the tilt lens barrel portion in the shake correction optical system. It has not been.

For example, when the runout detecting means is fixed to the lens barrel portion that holds the photographing optical system, the flexible printed wiring board (electric circuit board) on which the runout detecting means is mounted is configured on the image plane side of the lens barrel portion. It becomes necessary to correspond to the movement of the lens barrel, which complicates the wiring.

An object of the present invention is to provide a lens barrel and an optical device having the same, which makes it easy to route the wiring of the image shake detecting means and can further correct the image shake in the lens barrel provided with the tilted lens barrel. It is in.

A lens barrel according to the present invention for achieving the above object, an imaging optical system including an image blur correction optical system, and the image shake detection means for detecting an image blur amount, the image plane side of the imaging optical system a fixed barrel portion provided, the fixing barrel portion provided et al is on the object side than the first lens barrel for rotating the imaging optical system about a predetermined axis, the optical axis of the imaging optical system a second barrel portion to tilt, a luer cage barrel portion and a third barrel unit for moving the photographing optical system in the direction orthogonal to the optical axis, and the rotation amount of the first barrel portion, By driving the image shake correction optical system based on the output of the tilt amount detecting means for detecting the movement amount of the second and third lens barrels, the image shake detecting means, and the tilting amount detecting means. have a driving means for performing image stabilization, the image shake detection means, most than the barrel portion of the object side is integrated with the lens barrel of the image plane side, the image blur correction in the tilt barrel The optical system is characterized in that it is integrated with the lens barrel portion on the most subject side of the tilted lens barrel portion .

Further, the optical device according to the present invention is characterized by having the above-mentioned lens barrel.

According to the present invention, there is provided a lens barrel and an optical device having the same, which makes it easy to route the wiring of the image shake detecting means and can further correct the image shake in the lens barrel provided with the tilted lens barrel. Can be done.

It is sectional drawing which shows the structure of the single-lens reflex camera which mounted the lens barrel which concerns on 1st Embodiment of this invention. It is a block diagram which shows the electric circuit structure which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the structure of the single-lens reflex camera which mounted the lens barrel according to the 2nd Embodiment of this invention. It is the top view which looked at the whole structure of the image pickup apparatus which concerns on embodiment of this invention from directly above.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<< First Embodiment >>
(Optical equipment)
First, an image pickup device as an optical device equipped with an interchangeable lens (lens lens barrel) according to an embodiment of the present invention will be described. Here, as an example of such an imaging device, a digital single-lens reflex camera with interchangeable lenses will be mentioned. FIG. 1 is a cross-sectional view showing the configuration of an interchangeable lens digital single-lens reflex camera equipped with the lens barrel of the present embodiment.

In FIG. 1, the direction in which the lens optical axis (indicated by a single point chain line in the figure) extends is defined as the Z direction, and the horizontal direction (horizontal direction) of the two directions orthogonal to the optical axis and orthogonal to each other is defined as the X direction. The direction (vertical direction) is the Y direction. Note that FIG. 1 shows a state in which the optical axis of the lens and the central axis of the tubular member constituting the tilted lens barrel portion, which will be described later, are aligned with each other.

1 is a camera body (hereinafter, simply referred to as a camera), and 2 is an interchangeable lens (lens lens barrel) detachably attached to the camera 1. First, the structure of the camera 1 will be described. In the state shown in FIG. 1, the main mirror 3 is arranged on the optical path of the luminous flux from the interchangeable lens 2, reflects a part of the luminous flux and guides it to the finder optical system (7, 8), and transfers the remaining luminous flux. Make it transparent. A sub-mirror 4 is arranged behind the main mirror 3, and reflects the light flux transmitted through the main mirror 3 to guide the focus detection unit 5. The main mirror 3 and the sub mirror 4 can be retracted from the optical path by a drive mechanism (not shown).

The focus detection unit 5 has an AF sensor and has a function of performing focus detection (detection of the focal state of the lens barrel 2) by a phase difference detection method. The AF sensor consists of a separator lens that divides the incident luminous flux into two, two secondary imaging lenses that reimage each divided luminous flux, and two light receiving elements that photoelectrically convert the two imaged subject images. It is composed of rows (line sensors). Each line sensor is configured by arranging a plurality of light receiving elements in a cross shape extending in the Y direction and the X direction, and photoelectrically converts a subject image according to the luminance distribution in the Y direction and the X direction.

Reference numeral 6 denotes an image pickup device composed of a CCD sensor or a CMOS sensor. A subject image formed by the light flux from the lens barrel 2 is formed on the light receiving surface (imaging surface) of the image sensor 6. The image sensor 6 photoelectrically converts the subject image and outputs an image pickup signal. Further, the exposure amount of the image sensor 6 is controlled by an electronically controlled focal plane shutter (not shown).

The finder optical system is composed of a pentaprism 7 and an eyepiece lens 8. Reference numeral 9 denotes a display panel, which displays various information in addition to the image generated from the image pickup signal from the image pickup element 6. In a camera having such a configuration, when an operation of a release button (not shown) is performed, after autofocus processing and exposure determination processing are performed, the exposure of the image sensor 6 and the recording and display operation of the image generated by the exposure are performed. Is done.

(Interchangeable lens (lens barrel))
Next, the interchangeable lens (lens lens barrel) 2 will be described. The photographing optical systems housed in the interchangeable lens 2 are, in order from the object side (subject side), the first lens unit 11, the second lens unit 12 as the image shake correction optical system, the third lens unit 13, and the fourth. The lens unit 14 is included. Further, an aperture unit 15 is arranged between the second lens unit 12 and the third lens unit 13, and adjusts the amount of light passing through the interchangeable lens 2 and reaching the camera 1 side. The taking optical system is composed of the lens units 11 to 14 and the aperture unit 15.

The first lens unit 11 and the fourth lens unit 14 are a group of lenses that are immovable with respect to the fixed cylinder 16 that supports the entire photographing optical system. Here, the imaging optical system including the first lens unit 11, the second lens unit 12, the third lens unit 13, and the fourth lens unit 14 is held by the fixed cylinder 16 and fixed to the tilt cylinder 23 described later. Therefore, the second lens unit 12 as the image shake correction optical system and the image shake correction drive unit 17 as a drive means for performing image shake correction described later are integrated with the tilt cylinder 23.

The second lens unit 12 as the image shake correction optical system moves in the direction orthogonal to the optical axis in response to the driving force from the image shake correction driving unit 17, and performs image shake correction. Further, the third lens unit 13 is a focus adjustment lens group, and moves in the optical axis direction by transmitting an operating force by the photographer by a transmission mechanism (not shown) to adjust the focus.

(Aori lens barrel 19)
Reference numeral 18 denotes a mount cylinder (fixed lens barrel portion) that can be attached to and detached from the camera 1, and is provided on the image plane side of the photographing optical system. On the object side (subject side) of the mount cylinder 18, there is a tilt lens barrel portion 19 that moves the photographing optical system with respect to the mount cylinder 18. The tilt lens barrel portion 19 is composed of a first revolving cylinder 20, a shift cylinder 21, a second revolving cylinder 22, and a tilt cylinder 23 in order from the mount cylinder 18.

Here, the first revolving cylinder 20 and the second revolving cylinder 22 function as a first lens barrel portion that rotates the photographing optical system around a predetermined axis or around the optical axis of the photographing optical system. Further, the tilt cylinder 23 functions as a second lens barrel portion that tilts the optical axis of the photographing optical system, and the shift cylinder 21 functions as a third lens barrel portion that drives the photographing optical system in the direction orthogonal to the optical axis.

The first revolving cylinder 20 is rotatably supported around the axis of the mount cylinder 18, and when the first revolving cylinder 20 rotates, the shift cylinder 21, the second revolving cylinder 22, and the tilt cylinder 23 also rotate by the same amount. To do.

The shift cylinder 21 is movably supported with respect to the first revolving cylinder 20 in the direction orthogonal to the axis of the mount cylinder 18, and when the shift cylinder 21 moves in the direction orthogonal to the axis, the second revolving cylinder 22 and The tilt cylinder 23 also moves by the same amount.

The second revolving cylinder 22 is rotatably supported around the axis of the shift cylinder 21 with respect to the shift cylinder 21, and when the second revolving cylinder 21 rotates, the tilt member 23 also rotates by the same amount.

The tilt cylinder 23 is supported so as to be inclined with respect to the axis of the second revolving cylinder 22. Therefore, the fixed cylinder 16 that supports the entire photographing optical system is tilted by the same amount as the tilt cylinder 23.

4 (a) and 4 (b) show a top view of the entire configuration of the image pickup apparatus according to the present embodiment as viewed from directly above. In FIG. 4A, the shift cylinder 21 is rotatably supported around the optical axis (Z direction) of the photographing optical system with respect to the first revolving cylinder 20. Further, the tilt cylinder 23 is rotatably supported around the optical axis of the photographing optical system with respect to the second revolving cylinder 22. FIG. 4B shows a state in which the tilt cylinder 23 is rotated together with the second revolving cylinder 22 around the center Oct of the image sensor by an angle Δθ.

The electric circuit board 24 is fixed to the shift cylinder 21. The electric circuit board 24 is configured with an electric circuit for controlling the operation of the lens barrel and performing various calculations. Further, an angular velocity sensor 25 and an acceleration sensor 26 are mounted on the electric circuit board 24.

In the present embodiment, since the angular velocity sensor 25 is arranged on the electric circuit board 24 fixed to the shift cylinder 21, it is more flexible than arranging the angular velocity sensor 25 on any of the lens units 11 to 14 constituting the photographing optical system. The movement of the substrate (flexible) is reduced. Therefore, it is easy to route the flex. Similarly, by arranging the angular velocity sensor 25 on the electric circuit board 24 fixed to the shift cylinder 21, the angular velocity sensor 25 is arranged on the tilt cylinder 23 which is arranged on the most subject side of the tilt lens barrel portion 19. Since the movement of the flex is reduced, it is easy to route the flex.

Here, in the present embodiment, as will be described later, runout information indicating the runout of the camera 1 is generated based on the signal from only the angular velocity sensor 25 or based on the signals from the angular velocity sensor 25 and the acceleration sensor 26. .. Then, the second lens unit is driven in the direction opposite to the runout direction indicated by the runout information and according to the runout displacement amount indicated by the runout information (calculated from the runout displacement amount and the sensitivity of the runout correction lens). The image shake correction driving unit 17 is controlled so as to drive 12. The drive of the image shake correction drive unit 17 is controlled by the lens CPU 201 (FIG. 2) described later.

(Block Diagram)
FIG. 2 is a block diagram showing an electric circuit configuration of the interchangeable lens type digital single-lens reflex camera system shown in FIG. In this figure, 100 is an electric circuit on the camera 1 side (hereinafter referred to as a camera side electric circuit), and 200 is an electric circuit on the interchangeable lens 2 side (hereinafter referred to as a lens side electric circuit).

In the camera-side electric circuit, 101 is a camera CPU composed of a microcomputer. The camera CPU 101 controls the operation of each component on the camera 1 side, and is provided on the interchangeable lens 2 via the camera contact 102 and the lens contact 202 on the interchangeable lens 2 side (hereinafter, simply referred to as the lens 2 side). Communicates with the CPU 201. The camera contact 102 includes a signal transmission contact that transmits a signal to the lens 2 side and a power supply contact that supplies power to the interchangeable lens 2. Further, the lens contact 202 includes a signal transmission contact for exchanging signals with the camera 1 side and a power supply contact for receiving power supply from the camera 1 side.

Reference numeral 103 denotes a power switch that can be operated from the outside, and is a switch for starting up the camera CPU 101 to supply power to each actuator, sensor, or the like in the system and to enable the operation of the system. Further, reference numeral 104 denotes a two-stage stroke type release switch (SW) that can be operated from the outside, and has a first stroke switch (SW1) and a second stroke switch (SW2). The signal from the release switch 104 is input to the camera CPU 101.

The camera CPU 101 enters the shooting preparation state in response to the input of the ON signal from the first stroke switch (SW1). Then, the photometric unit 105 measures the subject brightness, the AF-capable lens barrel detects the AF sensor accumulation time, and the focus detection unit 106 starts the focus detection by the phase difference detection method.

Further, the camera CPU 101 calculates the aperture value of the aperture unit 15, the exposure amount of the image sensor 6, and the like based on the photometric result. Then, upon receiving the ON signal from the image shake correction switch (SW) 203 provided on the lens 2 side, the drive control of the second lens unit 12, that is, the image shake correction control is started.

When the ON signal from the second stroke switch (SW2) is input, the camera CPU 101 transmits an aperture drive command to the lens CPU 201 to set the aperture unit 15 to the previously calculated aperture value. Further, the camera CPU 101 transmits an exposure start command to the exposure unit 107 to cause the main mirror 3 and the sub mirror 4 to perform the retracting operation and the shutter opening operation, and the imaging unit 108 including the image sensor 6 performs photoelectric conversion of the subject image. That is, let them take a picture.

The image pickup signal from the image pickup unit 108 is digitally converted by the signal processing unit 109, further subjected to various correction processes, and output as an image signal. The image signal (data) is recorded and stored in the image recording unit 110 in a semiconductor memory such as a flash memory or a recording medium such as a magnetic disk or an optical disk.

The image shake correction switch 203 is operated by the photographer to select whether or not to perform the image shake correction control. The ON signal from the image shake correction switch 203 is also transmitted to the camera 1 side via the lens CPU 201.

Reference numeral 204 denotes a calculated output of the angular velocity sensor 25 (FIG. 1). The angular velocity sensor 25 is composed of a detection unit that outputs an angular velocity signal indicating the angular velocity of each of the vertical (pitch direction) runout and the lateral (yaw direction) runout, which is the angular velocity of the image pickup apparatus according to the present embodiment, and an arithmetic output unit. It is configured. The calculation output unit outputs a signal indicating the displacement of the pitch direction runout and the yaw direction runout (angle runout displacement amount) obtained by electrically or mechanically integrating the angular velocity signal from the detection unit to the lens CPU 201. It is outputting. The operation of the angular velocity sensor 25 (FIG. 1) is controlled to be ON / OFF by a command signal from the lens CPU 201.

Reference numeral 205 denotes an output of the acceleration sensor 26 (FIG. 1). Acceleration in the three directions of X, Y, and Z that are orthogonal to each other is detected mechanically, specifically using the inertial force generated by the runout, and a signal indicating the acceleration (parallel runout information in the X and Y directions, And Z-direction focus deviation information) is output to the lens CPU 201.

Reference numeral 206 denotes an acceleration / velocity calculation unit, which obtains parallel runout information in the X and Y directions and focus shake information in the Z direction as the acceleration sensor output 205 according to the imaging magnification information described later, and the amount of parallel runout displacement in the X and Y directions. , And Z-focus runout displacement. Further, the parallel runout velocity / parallel runout acceleration in the X and Y directions and the focus runout speed / focus runout acceleration in the Z direction are calculated from the values. Here, if the angular runout has already been corrected, the runout in the X and Y directions is considered to be only parallel runout excluding the angular runout.

Reference numeral 207 is a runout / displacement calculation unit, which removes the gravitational acceleration component from the acceleration sensor output 205. Furthermore, the acceleration is integrated to obtain the runout velocity, which is integrated. As a result, the parallel and focus runout displacement amounts excluding the gravitational acceleration component are calculated based on the acceleration sensor output 205. Since it is necessary to obtain the initial speed of the camera 1 in the calculation of the runout speed and the runout displacement, the runout speed (parallel, focus runout speed) obtained by the acceleration / speed calculation unit 206 is set as the initial speed. To do.

Reference numeral 208 denotes an angular runout / parallel runout synthesis unit, which is based on the amount of parallel runout displacement by the acceleration sensor output 205 calculated by the runout displacement calculation unit 207 and the amount of angular runout displacement (pitch, yaw direction) by the angular velocity sensor calculation output 204. Determine the amount of runout correction. Specifically, the amount of runout displacement due to parallel runout in the X direction and the amount of runout displacement on the image plane due to angular runout in the yaw direction are combined, and the amount of runout displacement due to parallel runout in the Y direction and the angle in the pitch direction. The amount of runout displacement on the image plane due to runout is combined.

Then, as will be described later, the runout correction amount calculated by the angle runout / parallel runout synthesis unit 208 is based on the rotation amount θ1 of the first revolving cylinder 20 as the tilt amount detected by the tilt amount detection unit 214. , The runout amount calculation unit 215 converts the vertical runout amount and the horizontal runout amount, respectively.

Then, 209 is a drive amount calculation unit that finally calculates the drive amount of the shake correction of the second lens unit 12. Specifically, θ is the sum of the vertical runout amount and the lateral runout amount converted by the runout amount calculation unit 215, the rotation amount θ1 of the first revolving cylinder 20, and the rotation amount θ2 of the second revolving cylinder 22. Based on the above, the final drive amount and drive direction of the runout correction of the second lens unit 12 are calculated.

Reference numeral 210 denotes a correction drive control unit, which selectively performs runout correction control based on angular runout or runout correction control based on the total value (combined value) of angular runout and parallel runout in response to ON of the image runout correction switch 203. To run. Specifically, in the correction drive control unit 210, the magnification (shooting magnification) indicated by the imaging magnification information is a predetermined value (for example, 0.2 to 0.3 times, more preferably 0.1 times). If it is lower, runout correction control based only on angular runout is performed. Further, when the photographing magnification is in the macro range of the above-mentioned predetermined value or more, the shake correction control is performed based on the total displacement amount of the angular shake and the parallel shake even before the start of exposure.

The acceleration / velocity calculation unit 206 to the correction drive control unit 210, and the runout amount calculation unit 215, which will be described later, are provided in the lens CPU 201.

Reference numeral 211 denotes a correction drive unit, which includes an image shake correction drive unit 17 shown in FIG. 1 and a drive circuit thereof. The image shake correction drive unit 17 is composed of an X-direction actuator composed of a permanent magnet and a coil for driving the second lens unit 12 in the X direction, and a Y-direction actuator composed of a permanent magnet and a coil for driving the second lens unit 12 in the Y direction. A locking mechanism is provided in the lens 2 for holding the optical axis at a position substantially coincide with the original lens optical axis in a state in which the second lens unit 12 is not shifted.

The correction drive unit 211 locks the lock mechanism when the image shake correction switch 203 is turned off (when the shake correction is stopped) in response to a command signal from the lens CPU 201. Further, when the image shake correction switch 203 is turned on (during the shake correction operation), the lock mechanism is unlocked.

Reference numeral 212 denotes an aperture drive unit, which is controlled by the lens CPU 201 that receives an aperture drive command from the camera CPU 101, and operates the aperture unit 15 shown in FIG. 1 in an aperture state corresponding to the aperture value specified by the command.

Reference numeral 213 is a shooting magnification detection unit, which calculates the shooting magnification based on the position of the third lens unit 13. The calculated shooting magnification information is transmitted to the acceleration / speed calculation unit 206 and also transmitted to the camera CPU 101 via the lens CPU 201.

As described above, Reference numeral 214 denotes a tilt amount detection unit, which detects the tilt amount by the tilt lens barrel portion 19 shown in FIG. Specifically, the rotation amount θ1 of the first revolving cylinder 20 with respect to the origin position, the rotation amount θ2 of the second revolving cylinder 22, the movement amount of the shift cylinder 21, and the inclination amount of the tilt cylinder 23 are detected.

As described above, in the lens barrel according to the present embodiment, as shown in FIG. 1, the angular velocity sensor 25 is mounted on the electric circuit board 24, the electric circuit board 24 is fixed to the shift cylinder 21, and the shift cylinder 21 is the first. It is said that it can be rotationally moved to the mount cylinder 18 together with the revolving cylinder 20 of the above. That is, when the first revolving cylinder 20 rotates with respect to the mount cylinder 18, the angular velocity sensor 25 also rotates by the same amount. When the angular velocity sensor 25 rotates, the detection direction of the angular velocity shake changes.

Therefore, the runout correction amount calculated by the angle runout / parallel runout synthesis unit 208 is calculated by the runout amount calculation unit based on the rotation amount θ1 of the first revolving cylinder 20 as the tilt amount detected by the tilt amount detection unit 214. At 215, it is converted into a vertical runout amount and a horizontal runout amount, respectively.

Here, the image shake correction driving unit 17 at the position shown in FIG. 1 is the sum of the rotation amount θ1 of the first revolving cylinder 20 and the rotation amount θ2 of the second revolving cylinder 22 detected by the presence amount detection unit 214. It rotates with respect to the mount cylinder 18 by θ. Therefore, with respect to the amount of vertical runout and horizontal runout calculated by the runout amount calculation unit 215, the drive amounts of the X-direction actuator and the Y-direction actuator of the image runout correction drive unit 17 are based on the above-mentioned rotation amount θ. The drive amount calculation unit 209 calculates.

As a result, according to the present embodiment, the drive direction and drive amount of the image shake correction drive unit 17 of the shake correction device mounted on the lens barrel capable of tilting photography can be correctly acquired according to the revolving amount. , Accurate image shake correction is possible. Further, the angular velocity sensor 25 in the present embodiment is provided in a lens barrel other than the lens barrel on the most subject side of the tilt lens barrel portion, and the amount of tilt is smaller than that provided in the lens barrel on the most subject side of the tilt lens barrel portion. Therefore, the wiring route associated with the mounting of the angular velocity sensor becomes easy.

<< Second Embodiment >>
Next, the interchangeable lens (lens lens barrel) according to the second embodiment of the present invention will be described. FIG. 3 is a cross-sectional view showing a configuration example of an interchangeable lens type digital single-lens reflex camera equipped with a lens barrel according to the present embodiment. In the present embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment, the angular velocity sensor 25 is mounted on the electric circuit board 24 fixed to the shift cylinder 21. On the other hand, in the lens barrel according to the present embodiment, the angular velocity sensor 25 is fixed to the mount cylinder 18. In the lens barrel 2 according to the present embodiment, since the angular velocity sensor 25 is fixed to the mount cylinder 18, the angular velocity detection direction of the angular velocity sensor 25 is constant regardless of the amount of tilt by the tilt lens barrel portion 19. Is.

On the other hand, the image shake correction driving unit 17 is the sum of the first revolving cylinder 20 rotation amount θ1 and the second revolving cylinder 21 rotation amount θ2 with respect to the origin position detected by the presence amount detection unit 215. Only rotate. Based on this θ, the drive amount calculation unit 209 (FIG. 2) finally calculates the drive amounts of the X-direction actuator and the Y-direction actuator of the image shake correction drive unit 17.

As a result, as in the first embodiment, the drive direction and drive amount of the image shake correction drive unit 17 of the shake correction device mounted on the lens barrel capable of photographing in the present embodiment can be changed according to the revolving amount. It can be acquired correctly, and accurate image shake correction is possible. Further, since the angular velocity sensor 25 in the present embodiment is provided on the mount cylinder 18 and the amount of tilt is zero, wiring routing accompanying the mounting of the angular velocity sensor becomes easy.

(Modification example)
Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.

(Modification example 1)
In the first embodiment described above, the angular velocity sensor 25 as the image shake detecting means is integrated with the shift lens barrel 21 as the second lens barrel portion, and the second lens unit 12 as the image shake correction optical system is used. It is integrated with the tilt cylinder 23 as the lens barrel portion of No. 3, but is not limited to this. For example, the arrangement of the shift cylinder 21 and the tilt cylinder 23 may be reversed. That is, the angular velocity sensor 25 as the image shake detecting means is integrated with the tilt cylinder 23 as the third lens barrel portion, and the second lens unit 12 as the image shake correction optical system is a shift mirror as the second lens barrel portion. It may be integrated with the cylinder 21.

That is, the angular velocity sensor 25 is integrated with one of the shift lens barrel 21 as the second lens barrel and the tilt tube 23 as the third lens barrel. Then, the image shake correction optical system may be integrated with the other of the shift lens barrel 21 as the second lens barrel and the tilt tube 23 as the third lens barrel.

(Modification 2)
In the first embodiment described above, the angular velocity sensor 25 is integrated with the mount cylinder 18, and the acceleration sensor 26 is integrated with the shift cylinder 21, but the angular velocity sensor 25 and the acceleration sensor 26 may be integrated with the mount cylinder 18. ..

12 ... 2nd lens unit (image shake correction optical system), 18 ... mount tube (fixed lens barrel), 19 ... tilt lens barrel, 20 ... 1st revolving tube, 21 ... shift tube, 22 ... 2nd revolving cylinder, 23 ... tilt cylinder, 210 ... drive amount calculation unit, 215 ... tilt amount detection means

Claims (9)

An imaging optical system equipped with an image shake correction optical system and
Image shake detecting means for detecting the amount of image blur ,
A fixed barrel portion provided on the image plane side of the imaging optical system,
Said fixed barrel portion provided et al is on the object side than the first lens barrel for rotating the imaging optical system about a predetermined axis, and a second barrel portion to tilt the optical axis of the imaging optical system a luer cage barrel portion and a third barrel unit for moving the photographing optical system in the direction orthogonal to the optical axis,
A tilt amount detecting means for detecting the rotation amount of the first lens barrel portion and the movement amount of the second and third lens barrel portions.
Have a driving means for performing image stabilization by driving the image blur correction optical system based on an output of said image shake detecting means and the tilt amount detection means,
The image shake detecting means is integrated with the lens barrel portion on the image plane side of the lens barrel portion on the most subject side in the tilt lens barrel portion , and the image deflection correction optical system is the most subject in the tilt lens barrel portion. A lens barrel characterized by being integrated with the lens barrel on the side . The lens barrel according to claim 1 , wherein one of the second and third lens barrels is arranged on the most subject side of the tilted lens barrel. The lens barrel according to claim 2, wherein the second lens barrel is arranged on the subject side of the tilted lens barrel. The lens barrel according to claim 2 or 3, wherein the image deflection detecting means is integrated with the lens barrel on the image plane side of the second and third lens barrels. The tilted lens barrel includes two first lens barrels, one of the two first lens barrels is arranged on the most image plane side of the tilted lens barrel , and the other is the second. The lens barrel according to any one of claims 1 to 4, wherein the lens barrel is arranged between the third lens barrel and the third lens barrel. The image blur amount is corrected based on the rotation amount of the first lens barrel portion arranged on the most image plane side, and the rotation amount of the first lens barrel portion arranged on the image plane side and the said It has a drive amount calculation unit that calculates the drive amount of the image curvature correction optical system based on the sum of the rotation amount of the first lens barrel portion arranged between the second and third lens barrel portions. The lens barrel according to claim 5. The lens barrel according to any one of claims 1 to 6, characterized in that it comprises detecting means is an angular velocity sensor shake the image. The image shake detecting means comprises a acceleration sensor,
If the shooting magnification is lower than the predetermined value, the drive means is the image shake by driving the correction optical system based on an output of the angular velocity sensor and the tilt amount detection means,
7. The driving means drives the image shake correction optical system based on the outputs of the angular velocity sensor, the acceleration sensor , and the tilt amount detecting means when the photographing magnification is equal to or higher than a predetermined value. The lens barrel described in. An optical apparatus comprising: the lens barrel according to any one of claims 1 to 8, and an image sensor for receiving light from the lens barrel.