Lens device, imaging device, lens device operation method, imaging device operation method, and program

Abstract

This lens device is provided to an imaging device main unit having an image sensor, wherein said lens device comprises: a lens including a shake correction lens that corrects shaking of an image obtained by light being formed into an image in the image sensor, incident light being formed into the image in the image sensor; a first drive mechanism that applies motive power to the shake correction lens along a coordinate plane that intersects the optical axis of the lens, thereby moving the shake correction lens in the direction in which the shaking of the image is corrected; and a second drive mechanism that applies motive force to the shake correction lens along the coordinate plane, thereby moving the shake correction lens in a direction in which the image is shifted.

Description

[Technical Field]

[0001] The technology of the present disclosure relates to a lens device, an imaging device, a method for operating a lens device, a method for operating an imaging device, and a program. [Background technology]

[0002] Japanese Patent Application Laid-Open Publication No. 2006-171694 discloses an image stabilization device for a camera lens assembly. The image stabilization device includes a base frame, a first frame mounted on the base frame so as to be movable in a first direction, a second frame mounted on the first frame so as to be movable in a second direction perpendicular to the first direction and having an image sensor mounted on one surface thereof, a linear motor mounted between the base frame and the first frame to move the first frame in the first direction, and a voice coil motor to move the second frame in the second direction.

[0003] Japanese Patent Application Laid-Open Publication No. 2012-226205 discloses a drive device that is applied to imaging devices such as digital cameras and performs image stabilization. The drive device includes a first member, a contact portion supported by the first member, a second member pressed against the contact portion and supported, a first drive mechanism that moves the second member and the first member relatively in a direction along a support surface formed by the contact portion, and a second drive mechanism that displaces the contact portion in a pressing direction relative to the first member. The second drive mechanism vibrates the contact portion in the pressing direction, thereby reducing the frictional force between the contact portion and the second member.

[0004] Japanese Patent Laid-Open Publication No. 2010-282028 discloses a lens unit for an imaging device. The lens unit includes a holding frame that holds the lens, a movement actuator that moves the holding frame connected to a mover that moves linearly relative to a stator, a braking unit that presses the mover and stator against each other to brake the mover against the stator when the movement actuator is not generating a driving force, and a braking unit actuator that cancels the pressing force between the mover and stator when the movement actuator generates a driving force. Summary of the Invention

[0005] As an example, one embodiment of the technology of the present disclosure provides a lens device, an imaging device, an operating method of a lens device, an operating method of an imaging device, and a program that can perform image blur correction and image shifting with greater precision using a blur correction drive mechanism that corrects image blur by moving a blur correction lens, compared to when the image is shifted by moving the blur correction lens. [Means for solving the problem]

[0006] A first aspect of the technology of the present disclosure is a lens device provided in an imaging device body having an image sensor, the lens including a blur correction lens that corrects blur in an image obtained by focusing light on the image sensor, the lens device including: a lens that focuses incident light on the image sensor; a first drive mechanism that moves the blur correction lens by applying power to the blur correction lens along a coordinate plane that intersects with the optical axis of the lens in a direction in which image blur is corrected; and a second drive mechanism that moves the blur correction lens by applying power to the blur correction lens along the coordinate plane in a direction in which the image is shifted.

[0007] A second aspect of the technology of the present disclosure is a lens device according to the first aspect, which includes a processor and a memory connected to or built into the processor, and the processor controls the first drive mechanism to move the blur correction lens in a direction in which image blur is corrected, and controls the second drive mechanism to move the blur correction lens in a direction in which the image is shifted.

[0008] A third aspect of the technique of the present disclosure is a lens device according to the second aspect, in which the second drive mechanism moves the blur correction lens in the direction in which the first drive mechanism moves the blur correction lens, and when the second drive mechanism moves the blur correction lens in the direction in which the first drive mechanism moves the blur correction lens, the blur correction lens moves by an amount obtained by adding the amount of movement of the blur correction lens by the second drive mechanism to the amount of movement of the blur correction lens by the first drive mechanism, and when the second drive mechanism moves the blur correction lens in the direction opposite to the direction in which the first drive mechanism moves the blur correction lens, the blur correction lens moves by an amount obtained by subtracting the amount of movement of the blur correction lens by the second drive mechanism from the amount of movement of the blur correction lens by the first drive mechanism.

[0009] A fourth aspect of the technology of the present disclosure is a lens device according to the second or third aspect, in which the control of the first drive mechanism is feedback control based on the amount of blur of an imaging device including a lens device and an imaging device body, and the control of the second drive mechanism is sequence control based on a predetermined shift order.

[0010] A fifth aspect of the technology of the present disclosure is a lens device according to any one of the second to fourth aspects, in which the processor controls the second drive mechanism to move the blur correction lens in a direction in which the image is shifted, in accordance with frame-by-frame image capture by the image sensor.

[0011] A sixth aspect of the technique of the present disclosure is a lens device according to any one of the second to fifth aspects, in which the processor controls the second drive mechanism to move the blur correction lens to a position where the image shifts at a pitch equal to or greater than the pixel pitch of the image sensor or at a pitch less than the pixel pitch of the image sensor.

[0012] A seventh aspect of the technique of the present disclosure is a lens device according to any one of the second to sixth aspects, wherein the coordinate plane is defined by a first direction and a second direction intersecting the first direction, the second drive mechanism has a third actuator and a fourth actuator, the third actuator moves the blur correction lens by applying power to the blur correction lens along the first direction, and the fourth actuator moves the blur correction lens by applying power to the blur correction lens along the second direction, and the processor controls the second drive mechanism to selectively switch between a combination of the presence or absence of power from the third actuator and the presence or absence of power from the fourth actuator.

[0013] An eighth aspect of the technique of the present disclosure is a lens device according to any one of the first to seventh aspects, in which the coordinate plane is defined by a first direction and a second direction intersecting the first direction, the second drive mechanism has a third actuator and a fourth actuator, the third actuator applies power to the blur correction lens along the first direction to move the blur correction lens, and the fourth actuator applies power to the blur correction lens along the second direction to move the blur correction lens.

[0014] A ninth aspect of the technique of the present disclosure is a lens device according to any one of the first to eighth aspects, comprising a holding member that holds the blur correction lens, a first support member that supports the holding member so that it can move along a coordinate plane, and a second support member that supports the first support member so that it can move along the coordinate plane, wherein the first drive mechanism is provided between the holding member and the first support member, and the second drive mechanism is provided between the first support member and the second support member.

[0015] A tenth aspect of the technique of the present disclosure is a lens device according to any one of the first to ninth aspects, comprising a holding member that holds a blur correction lens, a first support member that supports the holding member so that it can move along a coordinate plane, and a second support member that supports the first support member so that it can move along the coordinate plane, wherein the first drive mechanism is provided between the holding member and the first support member, and the second drive mechanism is provided between the first support member and the second support member.

[0016] An eleventh aspect of the technique of the present disclosure is the lens device according to the tenth aspect, in which the holding member is supported by the first support member so as to be rotatable around an axis member extending along the optical axis.

[0017] A twelfth aspect of the technique of the present disclosure is a lens device according to any one of the first to eleventh aspects, wherein the first drive mechanism has a voice coil motor and the second drive mechanism has a piezoelectric element.

[0018] A thirteenth aspect of the technique of the present disclosure is the lens device according to the twelfth aspect, in which the second drive mechanism has an elastic member disposed at a position facing the piezoelectric element.

[0019] A fourteenth aspect of the technique of the present disclosure is a lens device according to the ninth aspect, in which the coordinate plane is defined by a first direction and a second direction intersecting the first direction, the first drive mechanism has a first actuator provided between the holding member and the first support member and generating power in the first direction, and a second actuator provided between the holding member and the first support member and generating power in the second direction, and the second drive mechanism has a third actuator provided between the first support member and the second support member and generating power in the first direction, and a fourth actuator provided between the first support member and the second support member and generating power in the second direction.

[0020] A fifteenth aspect of the technique of the present disclosure is a lens device according to the tenth aspect, in which the coordinate plane is defined by a first direction and a second direction intersecting the first direction, the first drive mechanism has a first actuator provided between the first support member and the second support member and generating power in the first direction, and a second actuator provided between the first support member and the second support member and generating power in the second direction, and the second drive mechanism has a third actuator provided between the holding member and the first support member and generating power in the first direction, and a fourth actuator provided between the holding member and the first support member and generating power in the second direction.

[0021] A sixteenth aspect of the technique of the present disclosure is a lens device according to the tenth aspect, in which the coordinate plane is defined by a first direction and a second direction intersecting the first direction, the first drive mechanism has a first actuator provided between the first support member and the second support member and generating power in the first direction, and a second actuator provided between the first support member and the second support member and generating power in the second direction, and the second drive mechanism has a third actuator provided between the holding member and the first support member and generating power in a combined direction of the first and second directions.

[0022] A seventeenth aspect of the technology of the present disclosure is a lens device according to any one of the first to sixteenth aspects, which is arranged closer to the subject than the image sensor and includes an optical filter that transmits near-infrared light contained in the light.

[0023] An 18th aspect of the technology of the present disclosure is an imaging device including a processor, a memory connected to or built in the processor, an image sensor, a lens including a blur correction lens that corrects blur in an image obtained by focusing light on the image sensor, and that focuses incident light on the image sensor, a first drive mechanism that moves the blur correction lens by applying power to the blur correction lens along a coordinate plane that intersects with the optical axis of the lens in a direction in which image blur is corrected, and a second drive mechanism that moves the blur correction lens by applying power to the blur correction lens along the coordinate plane in a direction in which the image is shifted.

[0024] A 19th aspect of the technology of the present disclosure is an imaging device according to the 18th aspect, in which the processor controls the second drive mechanism to move the blur correction lens to a position where the image shifts at a pitch equal to or greater than the pixel pitch of the image sensor or a pitch less than the pixel pitch of the image sensor, causes the image sensor to capture an image in accordance with the image shift, and combines multiple frame images obtained by capturing the image.

[0025] A twentieth aspect of the technique of the present disclosure is a method for operating a lens device including: a lens that focuses incident light on the image sensor, including a blur correction lens that corrects image blur obtained by focusing light on an image sensor; a first drive mechanism that moves the blur correction lens by applying power to the blur correction lens along a coordinate plane that intersects with the optical axis of the lens in a direction in which image blur is corrected; and a second drive mechanism that moves the blur correction lens by applying power to the blur correction lens along the coordinate plane in a direction in which the image is shifted, the method including controlling the first drive mechanism to move the blur correction lens in the direction in which image blur is corrected, and controlling the second drive mechanism to move the blur correction lens in the direction in which the image is shifted.

[0026] A 21st aspect of the technology of the present disclosure is a method for operating an imaging device including an image sensor, a lens including an image sensor and a blur correction lens that corrects blur in an image obtained by focusing light on the image sensor, and that focuses incident light on the image sensor, a first drive mechanism that moves the blur correction lens by applying power to the blur correction lens along a coordinate plane that intersects with the optical axis of the lens in a direction in which image blur is corrected, and a second drive mechanism that moves the blur correction lens by applying power to the blur correction lens along the coordinate plane in a direction in which the image is shifted, the method including controlling the first drive mechanism to move the blur correction lens in the direction in which image blur is corrected, and controlling the second drive mechanism to move the blur correction lens in the direction in which the image is shifted.

[0027] A 22nd aspect of the technology of the present disclosure is a program for causing a computer applied to a lens device including: a lens that includes a blur correction lens that corrects blur in an image obtained by focusing light on an image sensor, and focuses incident light on the image sensor; a first drive mechanism that moves the blur correction lens by applying power to the blur correction lens along a coordinate plane that intersects with the optical axis of the lens in a direction in which image blur is corrected; and a second drive mechanism that moves the blur correction lens by applying power to the blur correction lens along the coordinate plane in a direction in which the image is shifted, to execute processing including controlling the first drive mechanism to move the blur correction lens in the direction in which image blur is corrected, and controlling the second drive mechanism to move the blur correction lens in the direction in which the image is shifted.

[0028] A 23rd aspect of the technology of the present disclosure is a program for causing a computer applied to an imaging device including an image sensor, a lens including an image sensor and a blur correction lens that corrects blur in an image obtained by focusing light on the image sensor, and that focuses incident light on the image sensor, a first drive mechanism that moves the blur correction lens by applying power to the blur correction lens along a coordinate plane that intersects with the optical axis of the lens in a direction in which image blur is corrected, and a second drive mechanism that moves the blur correction lens by applying power to the blur correction lens along the coordinate plane in a direction in which the image is shifted, to execute processing including controlling the first drive mechanism to move the blur correction lens in the direction in which image blur is corrected, and controlling the second drive mechanism to move the blur correction lens in the direction in which the image is shifted. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a perspective view showing an example of the configuration of a monitoring system according to a first embodiment. [Figure 2] 1 is a side view showing an example of the configuration of an optical system of a surveillance camera according to a first embodiment. [Figure 3]1 is a perspective view showing an example of the configuration of a filter unit and an image sensor according to the first embodiment. FIG. [Figure 4] 1 is a front view showing an example of the configuration of a main part of an image sensor according to a first embodiment. [Figure 5] 1 is a block diagram showing an example of the configuration of a surveillance camera main body according to a first embodiment. [Figure 6] 1 is a block diagram showing an example of the configuration of a lens device according to a first embodiment. [Figure 7] FIG. 2 is an exploded perspective view showing an example of the configuration of the shake correction / shift drive mechanism according to the first embodiment. [Figure 8] 1 is a front view showing an example of the configuration of a shake correction / shift drive mechanism according to a first embodiment. [Figure 9] 2 is a block diagram showing an example of the functional configuration of a CPU of the lens device according to the first embodiment. FIG. [Figure 10] 3 is a block diagram showing an example of a front-end configuration for correcting image blur in the surveillance camera according to the first embodiment. FIG. [Figure 11] 3 is a block diagram showing an example of a rear-stage part of a configuration for correcting image blur in the surveillance camera according to the first embodiment. FIG. [Figure 12] FIG. 2 is a block diagram showing an example of a front-end part of a configuration for shifting an image in the surveillance camera according to the first embodiment. [Figure 13] 3 is a block diagram showing an example of a rear stage of a configuration for shifting an image in the surveillance camera according to the first embodiment. FIG. [Figure 14] 1 is a block diagram showing a first example of a configuration for obtaining a composite image in a surveillance camera according to a first embodiment. [Figure 15] FIG. 4 is a block diagram showing a second example of the configuration for obtaining a composite image in the surveillance camera according to the first embodiment. [Figure 16] FIG. 10 is a block diagram showing a third example of the configuration for obtaining a composite image in the surveillance camera according to the first embodiment. [Figure 17]FIG. 2 is a block diagram showing a first operation example in which image blur correction and image shifting are performed in the lens device according to the first embodiment. [Figure 18] FIG. 10 is a block diagram showing a second operation example in which image blur correction and image shifting are performed in the lens device according to the first embodiment. [Figure 19] FIG. 10 is a block diagram showing a third operation example in which image blur correction and image shifting are performed in the lens device according to the first embodiment. [Figure 20] FIG. 10 is a block diagram showing a fourth operation example in which image blur correction and image shifting are performed in the lens device according to the first embodiment. [Figure 21] 4A and 4B are explanatory diagrams showing a first example of the movement of the blur correction lens in the lens device according to the first embodiment. [Figure 22] 5A and 5B are explanatory diagrams showing a second example of the movement of the blur correction lens in the lens device according to the first embodiment. [Figure 23] 10A and 10B are explanatory diagrams showing a third example of the movement of the blur correction lens in the lens device according to the first embodiment. [Figure 24] 5 is a flowchart showing an example of the flow of the blur correction process in the blur correction / shift process according to the first embodiment. [Figure 25] 10 is a flowchart showing an example of the flow of shift processing in the shake correction / shift processing according to the first embodiment. [Figure 26] FIG. 10 is an exploded perspective view showing an example of the configuration of a shake correction / shift drive mechanism according to a second embodiment. [Figure 27] FIG. 10 is a front view showing an example of the configuration of a shake correction / shift drive mechanism according to a second embodiment. [Figure 28] FIG. 11 is an exploded perspective view showing an example of the configuration of a shake correction / shift drive mechanism according to a third embodiment. [Figure 29] FIG. 11 is a front view showing an example of the configuration of a shake correction / shift drive mechanism according to a third embodiment. [Figure 30] FIG. 10 is a side view showing an example of the configuration of an optical system of a surveillance camera according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0030] Hereinafter, examples of embodiments of a lens device, an imaging device, a method for operating a lens device, a method for operating an imaging device, and a program according to the techniques of the present disclosure will be described with reference to the accompanying drawings.

[0031] First, the terms used in the following description will be explained.

[0032] CPU is an abbreviation for "Central Processing Unit". GPU is an abbreviation for "Graphics Processing Unit". NVM is an abbreviation for "Non-Volatile Memory". RAM is an abbreviation for "Random Access Memory". IC is an abbreviation for "Integrated Circuit". ASIC is an abbreviation for "Application Specific Integrated Circuit". PLD is an abbreviation for "Programmable Logic Device". FPGA is an abbreviation for "Field-Programmable Gate Array". SoC is an abbreviation for "System-on-a- Chip". SSD is an abbreviation for "Solid State Drive". HDD is an abbreviation for "Hard Disk Drive". EEPROM is an abbreviation for "Electrically Erasable and Programmable Read Only Memory". SRAM is an abbreviation for "Static Random Access Memory". VCM is an abbreviation for "Voice Coil Motor". I / F is an abbreviation for "Interface". UI is an abbreviation for "User Interface". USB is an abbreviation for "Universal Serial Bus". CMOS is an abbreviation for "Complementary Metal Oxide Semiconductor". CCD is an abbreviation for "Charge Coupled Device". LAN is an abbreviation for "Local Area Network". WAN is an abbreviation for "Wide Area Network". BPF is an abbreviation for "Band Pass Filter". Ir is an abbreviation for "Infrared Rays".

[0033] In the description of this specification, "vertical" refers to vertical in the sense of including, in addition to perfectly vertical, an error that is generally acceptable in the technical field to which the technology of the present disclosure belongs and that does not violate the spirit of the technology of the present disclosure. In the description of this specification, "horizontal" refers to horizontal in the sense of including, in addition to perfectly horizontal, an error that is generally acceptable in the technical field to which the technology of the present disclosure belongs and that does not violate the spirit of the technology of the present disclosure. In the description of this specification, "parallel" refers to parallel in the sense of including, in addition to perfectly parallel, an error that is generally acceptable in the technical field to which the technology of the present disclosure belongs and that does not violate the spirit of the technology of the present disclosure. In the description of this specification, "orthogonal" refers to orthogonal in the sense of including, in addition to perfectly perpendicular, an error that is generally acceptable in the technical field to which the technology of the present disclosure belongs and that does not violate the spirit of the technology of the present disclosure. In the description of this specification, "coincidence" refers to coincidence in the sense of including, in addition to perfect coincidence, an error that is generally acceptable in the technical field to which the technology of the present disclosure belongs and that does not violate the spirit of the technology of the present disclosure. In the description of this specification, "equally spaced" refers to not only perfectly evenly spaced intervals, but also equal intervals that include errors that are generally acceptable in the technical field to which the technology of the present disclosure belongs and that do not contradict the spirit of the technology of the present disclosure.

[0034] [First embodiment] First, the first embodiment will be described.

[0035] (Monitoring system) 1, a monitoring system S includes a monitoring camera 10 and a management device 11. The monitoring camera 10 is an example of an "imaging device" according to the technology of the present disclosure.

[0036] The surveillance camera 10 is installed on a pillar or wall indoors or outdoors, captures an image of a subject to be monitored, and generates a video image by capturing the image. The video image includes multiple frame images obtained by capturing the image. The surveillance camera 10 transmits the video image obtained by capturing the image to the management device 11 via a communication line 12. The management device 11 receives the video image transmitted by the surveillance camera 10, and displays the received video image on a display 13 or stores it in a storage device 14.

[0037] 1 corresponds to the pitch axis of the surveillance camera 10, the Y axis corresponds to the yaw axis of the surveillance camera 10, and the Z axis corresponds to the roll axis of the surveillance camera 10. Hereinafter, the direction along the X axis will be referred to as the X-axis direction, the direction along the Y axis will be referred to as the Y-axis direction, and the direction along the Z axis will be referred to as the Z-axis direction. The X-axis direction, Y-axis direction, and Z-axis direction are perpendicular to each other.

[0038] (Surveillance camera) As an example, as shown in FIG. 2 , a surveillance camera 10 includes a surveillance camera body 20 and a lens device 70. The surveillance camera body 20 is an example of an "imaging device body" according to the technology of the present disclosure. The surveillance camera body 20 includes a lens mount 22. The lens device 70 is separate from the surveillance camera body 20 and is detachably attached to the lens mount 22. The lens device 70 is provided in the surveillance camera body 20 by being attached to the lens mount 22.

[0039] The surveillance camera body 20 includes an image sensor 24. The image sensor 24 is, for example, a CMOS image sensor that photoelectrically converts received light and outputs an electrical signal corresponding to the received light. The CMOS image sensor is merely one example, and the image sensor 24 may be an image sensor that operates in a different manner from a CMOS image sensor, such as a CCD image sensor.

[0040] The image sensor 24 has a light receiving surface 24A. The imaging area light incident on the lens device 70 is focused on the light receiving surface 24A by the lens device 70. An image is obtained by focusing the imaging area light on the light receiving surface 24A. A plurality of photodiodes are arranged in a matrix on the light receiving surface 24A. Each photodiode receives the imaging area light. The image sensor 24 captures an image of the imaging area by receiving the imaging area light. As an example, the plurality of photodiodes include silicon photodiodes sensitive to visible light and indium gallium arsenide photodiodes sensitive to near-infrared light. The image sensor 24 captures images of each of the visible light and near-infrared light contained in the imaging area light focused on the light receiving surface 24A.

[0041] The lens device 70 has an optical axis OA. For example, the optical axis OA passes through the center of the light-receiving surface 24A and is perpendicular to the light-receiving surface 24A. The optical axis OA is parallel to the Z axis. For example, the lens device 70 includes an objective lens 72, a zoom lens 74, a blur correction lens 76, an aperture 78, a filter unit 80, and a master lens 82. The objective lens 72, the zoom lens 74, the blur correction lens 76, the aperture 78, the filter unit 80, and the master lens 82 are arranged along the optical axis OA in this order from the subject side to the image side. The optical axis OA is an axis passing through the centers of the objective lens 72, the zoom lens 74, the blur correction lens 76, and the master lens 82. The optical axis OA is also the optical axis of the objective lens 72, the zoom lens 74, the blur correction lens 76, and the master lens 82, and is an example of the "optical axis of a lens" according to the technology of the present disclosure.

[0042] Light from the imaging area is incident on the objective lens 72. The objective lens 72 guides the incident light from the imaging area to the zoom lens 74. The zoom lens 74 is made up of a lens group having a plurality of lenses that are movable along the optical axis OA, and is used for zooming the imaging area.

[0043] The blur correction lens 76 is a lens for correcting blur of the image obtained by focusing the imaging area light on the image sensor 24, as described below, and is a lens for shifting the image along the light receiving surface 24A of the image sensor 24.

[0044] The diaphragm 78 has an aperture 78A. The imaging area light guided by the zoom lens 74 passes through the aperture 78A. The diaphragm 78 is a movable diaphragm that can change the diameter of the aperture 78A. That is, the amount of imaging area light is changed by the diaphragm 78.

[0045] The filter unit 80 is disposed closer to the subject than the image sensor 24. As an example, the filter unit 80 is disposed between the diaphragm 78 and the master lens 82. The imaging area light that has passed through the diaphragm 78 is incident on the filter unit 80. As will be described in detail later, the filter unit 80 has a plurality of optical filters that are translucent, and by switching between optical filters that transmit light among the plurality of optical filters, the filter unit 80 selectively transmits light of a plurality of wavelength bands included in the imaging area light (as an example, visible light and near-infrared light of different wavelength bands).

[0046] The imaging area light that has passed through the filter unit 80 is incident on the master lens 82, and the imaging area light that has entered the master lens 82 is imaged on the light-receiving surface 24A. In this way, the imaging area light that has entered the lens device 70 is guided to the image sensor 24 by the multiple lenses provided in the lens device 70, and is imaged on the light-receiving surface 24A of the image sensor 24. The blur correction lens 76 included in the multiple lenses provided in the lens device 70 is an example of a "blur correction lens" according to the technology of the present disclosure. Furthermore, the multiple lenses including the objective lens 72, zoom lens 74, blur correction lens 76, aperture 78, filter unit 80, and master lens 82 are an example of a "lens" according to the technology of the present disclosure. Note that the order of the objective lens 72, zoom lens 74, blur correction lens 76, aperture 78, filter unit 80, and master lens 82 may be arranged in a manner other than that described above. Each of the objective lens 72, the zoom lens 74, the shake correction lens 76, and the master lens 82 may be a single lens or a lens group having multiple lenses. Furthermore, the lens device 70 may include other lenses in addition to the objective lens 72, the zoom lens 74, the shake correction lens 76, and the master lens 82.

[0047] (filter unit) 3, the filter unit 80 includes a circular plate 84. As an example, the circular plate 84 is provided with a plurality of optical filters, namely, a first BPF 88A, a second BPF 88B, a third BPF 88C, and a fourth BPF 88D, spaced at equal intervals along the circumferential direction. Hereinafter, unless there is a need to distinguish between them, the first BPF 88A, the second BPF 88B, the third BPF 88C, and the fourth BPF 88D will be referred to as optical filters. Furthermore, below, unless there is a need to distinguish between them, the first BPF 88A, the second BPF 88B, the third BPF 88C, and the fourth BPF 88D will be referred to as BPFs 88.

[0048] The filter unit 80 uses a turret system to selectively insert and remove a plurality of optical filters into and from the optical path (hereinafter simply referred to as the "optical path") of imaging area light within the lens device 70. Specifically, the first BPF 88A, the second BPF 88B, the third BPF 88C, and the fourth BPF 88D are selectively inserted and removed into and from the optical path (optical axis OA in the example shown in FIG. 3) by rotating the disk 84 in the circumferential direction (for example, the direction of the dashed arc arrow shown in FIG. 3). As a result, the first BPF 88A, the second BPF 88B, the third BPF 88C, and the fourth BPF 88D transmit light of different wavelength bands, respectively.

[0049] When an optical filter is inserted into the optical path, the optical axis OA passes through the center of the optical filter, and the center of the optical filter inserted into the optical path coincides with the center of the light-receiving surface 24A. In the example shown in Fig. 3, since the first BPF 88A is inserted into the optical path, the optical axis OA passes through the center of the first BPF 88A, and the center of the first BPF 88A coincides with the center of the light-receiving surface 24A.

[0050] The first BPF 88A, the second BPF 88B, and the third BPF 88C are optical filters that transmit visible light, and the fourth BPF 88D is an optical filter that transmits near-infrared light.

[0051] The first BPF 88A is an optical filter that transmits only light in the blue wavelength band, i.e., visible light in the 400 nm to 490 nm band, for example. The second BPF 88B is an optical filter that transmits only light in the green wavelength band, i.e., visible light in the 490 nm to 550 nm band, for example. The third BPF 88C is an optical filter that transmits only light in the red wavelength band, i.e., visible light in the 640 nm to 770 nm band, for example. The fourth BPF 88D is an optical filter that transmits only near-infrared light in the 1450 nm to 1650 nm band, for example. Note that each of the bands listed here includes errors that are generally acceptable in the technical field to which the technology of the present disclosure pertains and that do not deviate from the spirit and scope of the technology of the present disclosure. Furthermore, the wavelength bands listed here are merely examples, and each may be a different wavelength band.

[0052] (Image sensor) 4, the image sensor 24 includes a light receiving section 26 and a color filter section 28. The light receiving section 26 includes a plurality of first light receiving elements 30 and a plurality of second light receiving elements 32. An example of the first light receiving elements 30 is an indium gallium arsenide photodiode. An example of the second light receiving elements 32 is a silicon photodiode.

[0053] A color filter section 28 is disposed above the plurality of first light receiving elements 30 and the plurality of second light receiving elements 32. The color filter section 28 has an Ir filter, an R filter, a G filter, and a B filter. The Ir filter is a filter that transmits near-infrared (Ir) component light. The R filter is a filter that transmits red (R) component light. The G filter is a filter that transmits green (G) component light. The B filter is a filter that transmits blue (B) component light.

[0054] The first light receiving element 30 is a light receiving element sensitive to Ir component light. The second light receiving element 32 is broadly divided into a light receiving element 32R sensitive to R component light, a light receiving element 32G sensitive to G component light, and a light receiving element 32B sensitive to B component light.

[0055] An Ir filter is disposed on the first light receiving element 30. An R filter is disposed on the light receiving element 32R. A G filter is disposed on the light receiving element 32G. A B filter is disposed on the light receiving element 32B. Each of the light receiving elements 32R, 36G, and 36B is further provided with a filter that blocks near-infrared light.

[0056] In the image sensor 24 configured in this manner, the plurality of second light receiving elements 32 receive visible light that has passed through any of the first BPF 88A, the second BPF 88B, and the third BPF 88C, and generate and output a visible light image 60 based on the received visible light, and the plurality of first light receiving elements 30 receive near-infrared light that has passed through the fourth BPF 88D, and generate and output a near-infrared light image 62 based on the received near-infrared light.

[0057] (Surveillance camera body) As an example, as shown in FIG. 5, the surveillance camera main body 20 includes a controller 40 and a UI device 50.

[0058] The controller 40 controls the operation of the surveillance camera main body 20. The controller 40 includes a CPU 42, an NVM 44, and a RAM 46. The CPU 42, the NVM 44, and the RAM 46 are connected to a bus 48.

[0059] The NVM 44 stores various parameters and various programs. An example of the NVM 44 is an EEPROM (for example, a flash EEPROM). The EEPROM is merely an example of the NVM 44. The NVM 44 may be any of various non-volatile storage devices such as an SSD and / or an HDD. The RAM 46 temporarily stores various information and is used as a work memory. An example of the RAM 46 is a DRAM. The DRAM is merely an example of the RAM 46. The RAM 46 may be an SRAM or any of various volatile storage devices.

[0060] Various programs are stored in the NVM 44. The CPU 42 reads out necessary programs from the NVM 44 and executes the read programs on the RAM 46. The CPU 42 executes various processes in accordance with the programs executed on the RAM 46.

[0061] The UI device 50 is also connected to the bus 48. Under the control of the CPU 42, the UI device 50 receives instructions from the user and presents to the user various information obtained through processing by the surveillance camera 10.

[0062] The surveillance camera body 20 also includes an image sensor driver 52, a signal processing device 54, a blur amount detection sensor 56, and a communication I / F 58. The image sensor driver 52, the signal processing device 54, the blur amount detection sensor 56, and the communication I / F 58 are connected to the bus 48.

[0063] 2, the image sensor 24 is located on the optical axis OA after the master lens 82, i.e., closer to the image side than the master lens 82. In a state in which any one of the optical filters, the first BPF 88A, the second BPF 88B, and the third BPF 88C shown in FIG. 3, is arranged on the optical axis OA, the image sensor 24 captures an image of the imaging area based on visible light formed on the light receiving surface 24A by the master lens 82, thereby generating a visible light image 60 shown in FIG. 4, and outputs the generated visible light image 60 to a subsequent stage. The visible light image 60 is an image that shows the imaging area captured by visible light.

[0064] 3 is disposed on the optical axis OA, the image sensor 24 captures an image of the imaging area based on near-infrared light focused on the light receiving surface 24A by the master lens 82, thereby generating a near-infrared image 62 shown in FIG. 4, and outputs the generated near-infrared image 62 to a subsequent stage. The near-infrared image 62 is an image showing the imaging area captured by near-infrared light. Note that, hereinafter, unless it is necessary to distinguish between the near-infrared image 62 and the visible light image 60, they will be referred to as "captured images" without being assigned reference numerals.

[0065] 5, an image sensor driver 52 and a signal processing device 54 are connected to the image sensor 24. Under the control of the CPU 42, the image sensor driver 52 outputs a timing control signal to the image sensor 24. The timing control signal is a signal that controls image capture by the image sensor 24. The frame rate of image capture by the image sensor 24 is determined by the timing control signal.

[0066] The timing control signals include a vertical synchronization signal and a horizontal synchronization signal. The vertical synchronization signal is a signal that determines the timing to start transmitting one frame of analog image. The horizontal synchronization signal is a signal that determines the timing to start outputting one horizontal line of analog image. The image sensor 24 starts outputting the captured image to the signal processing device 54 in frame units in accordance with the vertical synchronization signal input from the image sensor driver 52. Also, the image sensor 24 starts outputting the captured image to the signal processing device 54 in horizontal line units in accordance with the horizontal synchronization signal input from the image sensor driver 52.

[0067] Under the control of the CPU 42, the signal processing device 54 performs signal processing such as demosaic processing, noise removal processing, gradation correction processing, and color correction processing on the captured image input from the image sensor 24. The signal-processed captured image is output to the CPU 42 by the signal processing device 54. The CPU 42 stores the captured image input from the signal processing device 54 in a predetermined storage area (for example, the NVM 44 and / or the RAM 46).

[0068] The blur amount detection sensor 56 detects the amount of blur (hereinafter simply referred to as "blur amount") of the surveillance camera 10 shown in FIG. 2, for example. Blur of the surveillance camera 10 refers to a phenomenon in which the positional relationship between the optical axis OA and the light receiving surface 24A of the surveillance camera 10 fluctuates. When blur occurs in the surveillance camera 10, image blur occurs. Examples of images include an image obtained by capturing an image with an image sensor and / or an optical image obtained by focusing on the light receiving surface 24A (hereinafter simply referred to as "image" or "subject image"). In the first embodiment, "image blur" refers to a phenomenon in which the subject image is displaced from the reference position due to tilting of the optical axis OA caused by vibration, i.e., a phenomenon in which the subject image is displaced from the reference position due to movement of the optical axis OA relative to the subject. The vibration phenomenon refers to a phenomenon in which the lens device 70 vibrates due to vibrations transmitted to the lens device 70 from outside the surveillance camera 10 (e.g., a hand, wind, and / or a vehicle, etc.) and / or inside the surveillance camera 10 (e.g., a motor mounted on the surveillance camera 10). Furthermore, "the optical axis OA tilts" means, for example, that the optical axis OA tilts with respect to a reference axis (e.g., the optical axis OA before the vibration phenomenon occurs (i.e., the optical axis OA when the surveillance camera 10 is stationary)). Furthermore, the "reference position" refers, for example, to the position of the subject image obtained when no vibration is applied to the lens device 70 (e.g., the position of the subject image within the light receiving surface 24A).

[0069] 5 is, for example, a gyro sensor. The gyro sensor detects the amount of rotational shake around each of the X, Y, and Z axes. The shake amount detection sensor 56 detects the amount of shake of the surveillance camera 10 by converting the amount of rotational shake around the X axis and the amount of rotational shake around the Y axis detected by the gyro sensor into the amount of shake in a two-dimensional plane parallel to the X and Y axes. Note that in this embodiment, the meaning of "parallel" includes not only perfect parallelism but also approximately parallelism that includes tolerances allowed in design and manufacturing.

[0070] Here, a gyro sensor is given as an example of shake amount detection sensor 56, but this is merely an example, and shake amount detection sensor 56 may also be an acceleration sensor. The acceleration sensor detects the amount of shake in a two-dimensional plane parallel to the X-axis and Y-axis. Shake amount detection sensor 56 outputs the detected amount of shake to CPU 42.

[0071] Also, while an example is given here in which the amount of blur is detected by a physical sensor called the blur amount detection sensor 56, the technology of the present disclosure is not limited to this. For example, a motion vector obtained by comparing successive captured images stored in the NVM 44 or the RAM 46 in chronological order may be used as the amount of blur. Furthermore, the amount of blur that is ultimately used may be derived based on the amount of blur detected by the physical sensor and the motion vector obtained by image processing.

[0072] The communication I / F 58 is, for example, a network interface, and controls the transmission of various information between the management device 11 and the monitoring camera 10 via a network. An example of a network is a WAN such as the Internet or a public communication network. The communication I / F 58 controls communication between the monitoring camera 10 and the management device 11 shown in FIG. 1.

[0073] (lens device) As an example, as shown in Fig. 6, the lens device 70 includes a controller 90. The controller 90 controls the operation of the lens device 70. The controller 90 includes a CPU 92, an NVM 94, and a RAM 96. The controller 90 is an example of a "computer applied to the lens device," the CPU 92 is an example of a "processor" according to the technology of the present disclosure, and the RAM 96 is an example of a "memory" according to the technology of the present disclosure. The CPU 92, the NVM 94, and the RAM 96 are connected to a bus 98.

[0074] 2, when the lens device 70 is attached to the lens mount 22 of the surveillance camera body 20, a connector (not shown) provided on the surveillance camera body 20 and a connector (not shown) provided on the lens device 70 are connected. Then, via a connection path including the connector of the surveillance camera body 20 and the connector of the lens device 70, the CPU 42 of the surveillance camera body 20 shown in FIG. 5 and the CPU 92 of the lens device 70 shown in FIG. 6 are communicatively connected. The CPU 92 of the lens device 70 controls the operation of the lens device 70 in accordance with instructions given from the CPU 42 of the surveillance camera body 20.

[0075] The NVM 94 stores various parameters and various programs. An example of the NVM 94 is an EEPROM (for example, a flash EEPROM). The EEPROM is merely an example of the NVM 94. The NVM 94 may be any of various non-volatile storage devices such as an SSD and / or an HDD. The RAM 96 temporarily stores various information and is used as a work memory. An example of the RAM 96 is a DRAM. The DRAM is merely an example of the RAM 96. The RAM 96 may be an SRAM or any of various volatile storage devices.

[0076] Various programs are stored in the NVM 94. The CPU 92 reads out the necessary programs from the NVM 94 and executes the read programs on the RAM 96. The CPU 92 executes various processes in accordance with the programs executed on the RAM 96. The "various programs" mentioned here also include a shake correction / shift processing program 100 (see FIG. 9) described below.

[0077] In the lens device 70, three mutually orthogonal axial directions are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction. As shown in FIG. 2 as an example, when the lens device 70 is attached to the lens mount 22 of the surveillance camera body 20, the X-axis direction, the Y-axis direction, and the Z-axis direction of the lens device 70 may be misaligned with the X-axis direction, the Y-axis direction, and the Z-axis direction of the surveillance camera 10, respectively, due to the influence of rattles and the like. However, for the sake of convenience, hereinafter, it is assumed that the X-axis direction, the Y-axis direction, and the Z-axis direction of the lens device 70 are identical to the X-axis direction, the Y-axis direction, and the Z-axis direction of the surveillance camera 10, respectively. The X-axis direction and the Y-axis direction are directions orthogonal to the optical axis OA of the lens device 70, and the Z-axis direction is a direction parallel to the optical axis OA.

[0078] 6 , the lens device 70 includes a first motor driver 102, an X-axis VCM driver 104, a Y-axis VCM driver 106, an X-axis piezoelectric element driver 108, a Y-axis piezoelectric element driver 110, a second motor driver 112, a third motor driver 114, and a fourth motor driver 116. The lens device 70 also includes a first motor 118, an X-axis VCM 120, a Y-axis VCM 122, an X-axis piezoelectric element 124, a Y-axis piezoelectric element 126, a second motor 128, a third motor 130, and a fourth motor 132. The lens device 70 also includes a first position sensor 134, an X-axis position sensor 136, a Y-axis position sensor 138, a second position sensor 140, a third position sensor 142, and a fourth position sensor 144.

[0079] The first motor driver 102, the X-axis VCM driver 104, the Y-axis VCM driver 106, the X-axis piezoelectric element driver 108, the Y-axis piezoelectric element driver 110, the second motor driver 112, the third motor driver 114, the fourth motor driver 116, the first position sensor 134, the X-axis position sensor 136, the Y-axis position sensor 138, the second position sensor 140, the third position sensor 142, and the fourth position sensor 144 are connected to the bus 98.

[0080] An example of each of the first position sensor 134, the X-axis position sensor 136, the Y-axis position sensor 138, the second position sensor 140, the third position sensor 142, and the fourth position sensor 144 is a potentiometer.

[0081] The first position sensor 134 detects the position of the zoom lens 74 in the Z-axis direction. The X-axis position sensor 136 detects the position of the blur correction lens 76 in the X-axis direction. The Y-axis position sensor 138 detects the position of the blur correction lens 76 in the Y-axis direction. The second position sensor 140 detects the diameter of the opening 78A formed in the diaphragm 78. The third position sensor 142 detects the rotational position of the filter unit 80 relative to the optical axis OA. The fourth position sensor 144 detects the position of the master lens 82 in the Z-axis direction.

[0082] The detection result by the first position sensor 134 is output to the CPU 92 by the first position sensor 134. The detection result by the X-axis position sensor 136 is output to the CPU 92 by the X-axis position sensor 136. The detection result by the Y-axis position sensor 138 is output to the CPU 92 by the Y-axis position sensor 138. The detection result by the second position sensor 140 is output to the CPU 92 by the second position sensor 140. The detection result by the third position sensor 142 is output to the CPU 92 by the third position sensor 142. The detection result by the fourth position sensor 144 is output to the CPU 92 by the fourth position sensor 144.

[0083] The zoom lens 74 is attached to a first slide mechanism (not shown). The first slide mechanism is mechanically connected to the drive shaft of a first motor 118, and receives power from the first motor 118 to move the zoom lens 74 along the Z-axis direction. The first motor driver 102 is connected to the first motor 118 and controls the first motor 118 in accordance with instructions from the CPU 92. The CPU 92 controls the first motor 118 via the first motor driver 102 based on the detection result of the first position sensor 134, thereby controlling the position of the zoom lens 74 in the Z-axis direction.

[0084] The blur correction lens 76 is attached to a blur correction / shift drive mechanism 150 (see FIGS. 7 and 8), the mechanical structure of which will be described in detail later. The blur correction / shift drive mechanism 150 (see FIGS. 7 and 8) includes an X-axis VCM 120 and a Y-axis VCM 122. The X-axis VCM 120 applies power to the blur correction lens 76 along the X-axis direction, thereby moving the blur correction lens 76 along the X-axis direction. The Y-axis VCM 122 applies power to the blur correction lens 76 along the Y-axis direction, thereby moving the blur correction lens 76 along the Y-axis direction.

[0085] The X-axis VCM driver 104 is connected to the X-axis VCM 120 and controls the X-axis VCM 120 in accordance with instructions from the CPU 92. The CPU 92 controls the X-axis VCM 120 via the X-axis VCM driver 104 based on the shake amount detection result by the shake amount detection sensor 56 output from the CPU 42 shown in FIG. 5 and the detection result by the X-axis position sensor 136 shown in FIG. 6, thereby controlling the position of the shake correction lens 76 in the X-axis direction. The Y-axis VCM driver 106 is connected to the Y-axis VCM 122 and controls the Y-axis VCM 122 in accordance with instructions from the CPU 92. The CPU 92 controls the Y-axis VCM 122 via the Y-axis VCM driver 106 based on the shake amount detection result by the shake amount detection sensor 56 output from the CPU 42 shown in FIG. 5 and the detection result by the Y-axis position sensor 138 shown in FIG. 6, thereby controlling the position of the shake correction lens 76 in the Y-axis direction.

[0086] The blur correction / shift drive mechanism 150 (see FIGS. 7 and 8) includes an X-axis piezoelectric element 124 and a Y-axis piezoelectric element 126. The X-axis piezoelectric element 124 applies power to the blur correction lens 76 along the X-axis direction, thereby moving the blur correction lens 76 along the X-axis direction. The Y-axis piezoelectric element 126 applies power to the blur correction lens 76 along the Y-axis direction, thereby moving the blur correction lens 76 along the Y-axis direction.

[0087] The X-axis piezoelectric element driver 108 is connected to the X-axis piezoelectric element 124 and controls the X-axis piezoelectric element 124 in accordance with instructions from the CPU 92. The CPU 92 controls the position of the blur correction lens 76 in the X-axis direction by controlling the X-axis piezoelectric element 124 via the X-axis piezoelectric element driver 108 based on the image shift command output from the CPU 42 shown in FIG. 5 and the detection result by the X-axis position sensor 136 shown in FIG. 6. The Y-axis piezoelectric element driver 110 is connected to the Y-axis piezoelectric element 126 and controls the Y-axis piezoelectric element 126 in accordance with instructions from the CPU 92. The CPU 92 controls the position of the blur correction lens 76 in the Y-axis direction by controlling the Y-axis piezoelectric element 126 via the Y-axis piezoelectric element driver 110 based on the image shift command output from the CPU 42 shown in FIG. 5 and the detection result by the Y-axis position sensor 138 shown in FIG. 6.

[0088] The diaphragm 78 has multiple blades (not shown) that can open and close the opening 78A. The multiple blades are mechanically connected to the drive shaft of a second motor 128 and open and close the opening 78A by receiving power from the second motor 128. A second motor driver 112 is connected to the second motor 128 and controls the second motor 128 in accordance with instructions from the CPU 92. The CPU 92 adjusts the opening degree of the opening 78A by controlling the second motor 128 via the second motor driver 112 shown in FIG. 6 based on the detection result by the second position sensor 140 and the amount of light received by the light receiving surface 24A shown in FIG. 5.

[0089] The filter unit 80 is attached to a rotation mechanism (not shown). The rotation mechanism is mechanically connected to the drive shaft of a third motor 130, and receives power from the third motor 130 to rotate a disk 84 (see FIG. 3) in the circumferential direction, thereby inserting and removing multiple optical filters into and from the optical path. A third motor driver 114 is connected to the third motor 130 and controls the third motor 130 in accordance with instructions from the CPU 92. The CPU 92 controls the third motor 130 via the third motor driver 114 based on the detection result of a third position sensor 142, thereby controlling the rotational position of the filter unit 80 relative to the optical axis OA.

[0090] The master lens 82 is attached to a second slide mechanism (not shown). The second slide mechanism is mechanically connected to the drive shaft of a fourth motor 132, and receives power from the fourth motor 132 to move the master lens 82 along the Z-axis direction. The fourth motor driver 116 is connected to the fourth motor 132, and controls the fourth motor 132 in accordance with instructions from the CPU 92. The CPU 92 controls the position of the master lens 82 in the Z-axis direction by controlling the fourth motor 132 via the fourth motor driver 116 based on the detection result of the fourth position sensor 144.

[0091] (blur correction and shift drive mechanism) As an example, as shown in FIGS. 7 and 8, the shake correction / shift drive mechanism 150 includes a holding member 152, a first support member 154, a second support member 156, an X-axis VCM 120, a Y-axis VCM 122, an X-axis piezoelectric element 124, a Y-axis piezoelectric element 126, an X-axis leaf spring 158, and a Y-axis leaf spring 160.

[0092] The +X-axis direction indicates the direction toward a first side in the X-axis direction, and the -X-axis direction indicates the direction toward a second side opposite the first side in the X-axis direction. The +Y-axis direction indicates the direction toward the first side in the Y-axis direction, and the -Y-axis direction indicates the direction toward a second side opposite the first side in the Y-axis direction. The +Z-axis direction indicates the direction toward the first side in the Z-axis direction, and the -Z-axis direction indicates the direction toward the second side opposite the first side in the Z-axis direction. Note that when the +X-axis direction and the -X-axis direction are not distinguished, the +X-axis direction and the -X-axis direction are collectively referred to as the X-axis direction. Similarly, when the +Y-axis direction and the -Y-axis direction are not distinguished, the +Y-axis direction and the -Y-axis direction are collectively referred to as the Y-axis direction. Similarly, when the +Z-axis direction and the -Z-axis direction are not distinguished, the +Z-axis direction and the -Z-axis direction are collectively referred to as the Z-axis direction. The Z-axis direction is parallel to the optical axis OA of the lens device 70. For example, the +Z-axis direction corresponds to the subject side, and the -Z-axis direction corresponds to the image side.

[0093] The XY coordinate plane used in the following description is defined by the X-axis direction and the Y-axis direction. The XY coordinate plane is an example of a "coordinate plane intersecting the optical axis of the lens" according to the technology of the present disclosure, the X-axis direction is an example of a "first direction" according to the technology of the present disclosure, and the Y-axis direction is an example of a "second direction intersecting the first direction" according to the technology of the present disclosure.

[0094] The holding member 152 is formed in a roughly plate-like shape. The holding member 152 is disposed with its thickness oriented in the Z-axis direction. A hole 162 is formed in the holding member 152, penetrating it in the Z-axis direction. The cross section of the hole 162, viewed from the axial direction, is circular. The blur correction lens 76 is disposed inside the hole 162. An annular fixing member 164 is provided on the outer periphery of the blur correction lens 76, and the outer periphery of the blur correction lens 76 is fixed to the inner periphery of the hole 162 via the fixing member 164 or the like. The blur correction lens 76 is held by the holding member 152 by fixing its outer periphery to the inner periphery of the hole 162 via the fixing member 164 or the like. When the X-axis VCM 120, the Y-axis VCM 122, the X-axis piezoelectric element 124, and the Y-axis piezoelectric element 126 (described later) are not operating and no blurring occurs in the surveillance camera 10, the center of the blur correction lens 76 is located on the optical axis OA.

[0095] The first support member 154 is formed in a generally plate-like shape. The first support member 154 is disposed with its plate thickness direction in the Z-axis direction. The first support member 154 is disposed opposite the holding member 152 in the Z-axis direction. A hole 166 is formed in the first support member 154, penetrating in the Z-axis direction. The cross section of the hole 166 is circular when viewed from the axial direction. The hole 166 is formed with a diameter equal to or larger than the diameter of the blur correction lens 76. In the example shown in FIGS. 7 and 8, as an example, the first support member 154 is disposed in the −Z-axis direction with respect to the holding member 152. Note that the first support member 154 may also be disposed in the +Z-axis direction with respect to the holding member 152. A sliding member (not shown), such as a ball, is disposed between the holding member 152 and the first support member 154, thereby supporting the holding member 152 by the first support member 154 so as to be movable along the XY coordinate plane. When the X-axis VCM 120, Y-axis VCM 122, X-axis piezoelectric element 124, and Y-axis piezoelectric element 126 described below are not operating and the surveillance camera 10 is not shaking, the center of the hole 166 is located on the optical axis OA.

[0096] The second support member 156 is fixed to the housing 70A of the lens device 70. The housing 70A of the lens device 70 is a member that supports the objective lens 72, zoom lens 74, diaphragm 78, filter unit 80, and master lens 82 (see FIG. 2) described above in addition to the blur correction lens 76 and the blur correction / shift drive mechanism 150, and the second support member 156 is fixed to the housing 70A of the lens device 70.

[0097] As an example, the second support member 156 is formed in a generally disk-like shape having a plate-shaped portion 168 and an annular portion 170 formed along the outer periphery of the plate-shaped portion 168. The annular portion 170 extends from the outer periphery of the plate-shaped portion 168 in the +Z-axis direction. The second support member 156 is disposed such that the thickness direction of the plate-shaped portion 168 coincides with the Z-axis direction. The first support member 154 is disposed inside the annular portion 170 formed on the second support member 156, and the first support member 154 is disposed opposite the plate-shaped portion 168 in the Z-axis direction. A hole 172 is formed in the plate-shaped portion 168, penetrating it in the Z-axis direction. The cross section of the hole 172 is circular when viewed in the axial direction. The hole 172 is formed to have a diameter equal to or larger than the diameter of the blur correction lens 76. The center of the hole 172 is located on the optical axis OA. A sliding member (not shown), such as a ball, is arranged between the first support member 154 and the plate-shaped portion 168, so that the first support member 154 is supported by the second support member 156 so as to be movable along the XY coordinate plane.

[0098] The X-axis VCM 120 and the Y-axis VCM 122 form a shake correction drive mechanism 174. The X-axis VCM 120 is an example of a "voice coil motor" and a "first actuator" according to the technology of the present disclosure, the Y-axis VCM 122 is an example of a "voice coil motor" and a "second actuator" according to the technology of the present disclosure, and the shake correction drive mechanism 174 is an example of a "first drive mechanism" according to the technology of the present disclosure.

[0099] The blur correction drive mechanism 174 is provided between the holding member 152 and the first support member 154. The blur correction drive mechanism 174 applies power to the blur correction lens 76 along the XY coordinate plane in a direction in which image blur is corrected, thereby moving the blur correction lens 76 along the XY coordinate plane. That is, the X-axis VCM 120 applies power to the blur correction lens 76 along the X-axis direction in a direction in which image blur in the X-axis direction is corrected, thereby moving the blur correction lens 76 along the X-axis direction, and the Y-axis VCM 122 applies power to the blur correction lens 76 along the Y-axis direction in a direction in which image blur in the Y-axis direction is corrected, thereby moving the blur correction lens 76 along the Y-axis direction.

[0100] As an example, the X-axis VCM 120 is disposed in the +X-axis direction relative to the blur correction lens 76. Note that the X-axis VCM 120 may also be disposed in the -X-axis direction relative to the blur correction lens 76. The X-axis VCM 120 is provided between the holding member 152 and the first support member 154 in the Z-axis direction. As an example, the X-axis VCM 120 is a flat coil type voice coil motor, and has a coil 176 and a pair of magnets 178 and 180.

[0101] As an example, the coil 176 is fixed to the holding member 152, and the pair of magnets 178 and 180 are fixed to the first support member 154. Alternatively, the coil 176 may be fixed to the first support member 154, and the pair of magnets 178 and 180 may be fixed to the holding member 152. The coil 176 is arranged with its axial direction aligned in the Z-axis direction, and the pair of magnets 178 and 180 are arranged side by side in the X-axis direction. The north pole of the magnet 178 faces the coil 176, and the south pole of the magnet 180 faces the coil 176.

[0102] The X-axis VCM 120 generates power in the X-axis direction. The direction of the current flowing through the coil 176 is switched by the X-axis VCM driver 104 (see FIG. 6 ). Switching the direction of the current flowing through the coil 176 switches the direction of the force that the coil 176 receives from the pair of magnets 178 and 180. When the coil 176 receives a force in the +X-axis direction from the pair of magnets 178 and 180, power is applied to the holding member 152 and the blur correction lens 76 in the +X-axis direction, and the holding member 152 and the blur correction lens 76 move in the +X-axis direction. When the coil 176 receives a force in the −X-axis direction from the pair of magnets 178 and 180, power is applied to the holding member 152 and the blur correction lens 76 in the −X-axis direction, and the holding member 152 and the blur correction lens 76 move in the −X-axis direction. In this way, power is applied by the X-axis VCM 120, and the blur correction lens 76 moves in the X-axis direction, thereby correcting blur of the image in the X-axis direction.

[0103] As an example, the Y-axis VCM 122 is disposed in the −Y-axis direction with respect to the blur correction lens 76. However, the Y-axis VCM 122 may also be disposed in the +Y-axis direction with respect to the blur correction lens 76. The Y-axis VCM 122 is provided between the holding member 152 and the first support member 154 in the Z-axis direction. As an example, the Y-axis VCM 122 is a flat coil type voice coil motor, and has a coil 182 and a pair of magnets 184 and 186.

[0104] As an example, coil 182 is fixed to holding member 152, and the pair of magnets 184 and 186 are fixed to first support member 154. Alternatively, coil 182 may be fixed to first support member 154, and the pair of magnets 184 and 186 may be fixed to holding member 152. Coil 182 is arranged with its axial direction aligned in the Z-axis direction, and the pair of magnets 184 and 186 are arranged side by side in the Y-axis direction. The north pole of magnet 184 faces coil 182, and the south pole of magnet 186 faces coil 182.

[0105] The Y-axis VCM 122 generates power in the Y-axis direction. The direction of the current flowing through the coil 182 is switched by the Y-axis VCM driver 106 (see FIG. 6 ). Switching the direction of the current flowing through the coil 182 switches the direction of the force that the coil 182 receives from the pair of magnets 184 and 186. When the coil 182 receives a force in the +Y-axis direction from the pair of magnets 184 and 186, power is applied to the holding member 152 and the blur correction lens 76 in the +Y-axis direction, and the holding member 152 and the blur correction lens 76 move in the +Y-axis direction. When the coil 182 receives a force in the −Y-axis direction from the pair of magnets 184 and 186, power is applied to the holding member 152 and the blur correction lens 76 in the −Y-axis direction, and the holding member 152 and the blur correction lens 76 move in the −Y-axis direction. In this way, power is applied by the Y-axis VCM 122, and the blur correction lens 76 moves in the Y-axis direction, thereby correcting blur of the image in the Y-axis direction.

[0106] As an example, the X-axis VCM 120 is a flat coil type voice coil motor in which the coil 176 and the pair of magnets 178 and 180 face each other in the axial direction of the coil 176, but the X-axis VCM 120 may be a square coil type voice coil motor in which the coil 176 is disposed between the pair of magnets 178 and 180 that face each other in the radial direction of the coil 176. Similarly, as an example, the Y-axis VCM 122 is a flat coil type voice coil motor in which the coil 182 and the pair of magnets 184 and 186 face each other in the axial direction of the coil 182, but the Y-axis VCM 122 may be a square coil type voice coil motor in which the coil 182 is disposed between the pair of magnets 184 and 186 that face each other in the radial direction of the coil 182.

[0107] The X-axis piezoelectric element 124, the Y-axis piezoelectric element 126, the X-axis leaf spring 158, and the Y-axis leaf spring 160 form a shift drive mechanism 188. The X-axis piezoelectric element 124 is an example of an "actuator" and a "third actuator" according to the technology of the present disclosure, and the Y-axis piezoelectric element 126 is an example of an "actuator" and a "fourth actuator" according to the technology of the present disclosure. The X-axis leaf spring 158 is an example of an "actuator" and a "fourth actuator" according to the technology of the present disclosure. "Elastic The Y-axis leaf spring 160 is an example of a "member" according to the technology of the present disclosure. "Elastic The shift drive mechanism 188 is an example of a "second drive mechanism" according to the technology of the present disclosure.

[0108] The shift drive mechanism 188 is provided between the first support member 154 and the second support member 156. The shift drive mechanism 188 applies power to the blur correction lens 76 along the XY coordinate plane in a direction in which the image is shifted, thereby moving the blur correction lens 76 along the XY coordinate plane. That is, the X-axis piezoelectric element 124 applies power to the blur correction lens 76 along the X-axis direction in a direction in which the image is shifted along the X-axis direction, thereby moving the blur correction lens 76 along the X-axis direction, and the Y-axis piezoelectric element 126 applies power to the blur correction lens 76 along the Y-axis direction in a direction in which the image is shifted along the Y-axis direction, thereby moving the blur correction lens 76 along the Y-axis direction.

[0109] As an example, the X-axis piezoelectric element 124 is disposed in the −X-axis direction with respect to the first support member 154. The X-axis piezoelectric element 124 is provided between the first support member 154 and the second support member 156 in the X-axis direction. Note that instead of the X-axis piezoelectric element 124, for example, an actuator such as a DC motor that generates power similar to that of a piezoelectric element may be used.

[0110] The X-axis leaf spring 158 is disposed opposite the X-axis piezoelectric element 124. That is, the X-axis leaf spring 158 is disposed in the +X-axis direction relative to the first support member 154. The X-axis piezoelectric element 124 is provided between the first support member 154 and the second support member 156 in the X-axis direction. The X-axis leaf spring 158 is, for example, a U-shaped or V-shaped leaf spring. Alternatively, the X-axis piezoelectric element 124 may be disposed in the +X-axis direction relative to the first support member 154, and the X-axis leaf spring 158 may be disposed in the -X-axis direction relative to the first support member 154. The X-axis leaf spring 158 may also be a leaf spring having a shape other than a U-shape or a V-shape. Alternatively, the X-axis leaf spring 158 may be replaced with an elastic member having elasticity, such as a coil spring, a torsion spring, rubber, or sponge.

[0111] The X-axis piezoelectric element 124 generates power in the X-axis direction. The X-axis piezoelectric element 124 is oriented so as to generate power in the +X-axis direction. The X-axis piezoelectric element driver 108 (see FIG. 6) switches between supplying and not supplying power to the X-axis piezoelectric element 124. When power is supplied to the X-axis piezoelectric element 124, the X-axis piezoelectric element 124 operates, and when power supply to the X-axis piezoelectric element 124 is stopped, the X-axis piezoelectric element 124 stops. When the X-axis piezoelectric element 124 operates, power is applied by the X-axis piezoelectric element 124 to the holding member 152 and the blur correction lens 76 in the +X-axis direction via the second support member 156, and the holding member 152, the blur correction lens 76, and the second support member 156 move in the +X-axis direction against the elastic force of the X-axis leaf spring 158. When power is applied by the X-axis piezoelectric element 124 in this way, the blur correction lens 76 moves, and the image shifts in the +X-axis direction. When the X-axis piezoelectric element 124 is stopped from its activated state, the elastic force of the X-axis leaf spring 158 in the -X-axis direction acts on the holding member 152 and the blur correction lens 76 via the second support member 156, and the holding member 152, the blur correction lens 76, and the second support member 156 move in the -X-axis direction and return to their original positions.

[0112] As an example, the Y-axis piezoelectric element 126 is disposed in the -Y-axis direction with respect to the first support member 154. The Y-axis piezoelectric element 126 is provided between the first support member 154 and the second support member 156 in the Y-axis direction. Note that instead of the Y-axis piezoelectric element 126, for example, an actuator such as a DC motor that generates power similar to that of a piezoelectric element may be used.

[0113] The Y-axis leaf spring 160 is disposed opposite the Y-axis piezoelectric element 126. That is, the Y-axis leaf spring 160 is disposed in the +Y-axis direction relative to the first support member 154. The Y-axis piezoelectric element 126 is provided between the first support member 154 and the second support member 156 in the Y-axis direction. The Y-axis leaf spring 160 is, for example, a U-shaped or V-shaped leaf spring. Alternatively, the Y-axis piezoelectric element 126 may be disposed in the +Y-axis direction relative to the first support member 154, and the Y-axis leaf spring 160 may be disposed in the -Y-axis direction relative to the first support member 154. The Y-axis leaf spring 160 may also be a leaf spring having a shape other than a U-shape or a V-shape. Alternatively, the Y-axis leaf spring 160 may be replaced with an elastic member having elasticity, such as a coil spring, a torsion spring, rubber, or sponge.

[0114] The Y-axis piezoelectric element 126 generates power in the Y-axis direction. The Y-axis piezoelectric element 126 is oriented so as to generate power in the +Y-axis direction. The Y-axis piezoelectric element driver 110 (see FIG. 6) switches between supplying and not supplying power to the Y-axis piezoelectric element 126. When power is supplied to the Y-axis piezoelectric element 126, the Y-axis piezoelectric element 126 operates, and when power supply to the Y-axis piezoelectric element 126 is stopped, the Y-axis piezoelectric element 126 stops. When the Y-axis piezoelectric element 126 operates, power is applied by the Y-axis piezoelectric element 126 to the holding member 152 and the blur correction lens 76 in the +Y-axis direction via the second support member 156, and the holding member 152, the blur correction lens 76, and the second support member 156 move in the +Y-axis direction against the elastic force of the Y-axis leaf spring 160. When power is applied by the Y-axis piezoelectric element 126 in this way, the blur correction lens 76 moves, and the image shifts in the +Y-axis direction. When the Y-axis piezoelectric element 126 stops moving from an activated state, the elastic force in the -Y-axis direction from the Y-axis leaf spring 160 acts on the holding member 152 and the blur correction lens 76 via the second support member 156, and the holding member 152, the blur correction lens 76, and the second support member 156 move in the -Y-axis direction and return to their original positions.

[0115] (Functional configuration of the lens device's CPU) 9, the blur correction and shift processing is realized by the CPU 92 of the lens device 70 executing a blur correction and shift processing program 100. The blur correction and shift processing program 100 is an example of a "program" according to the technology of the present disclosure. In the example shown in FIG. 9, the blur correction and shift processing program 100 is stored in the NVM 94, and the CPU 92 reads the blur correction and shift processing program 100 from the NVM 94 and executes it on the RAM 96.

[0116] The CPU 92 performs the shake correction and shift processing in accordance with a shake correction and shift processing program 100 executed on the RAM 96. By executing the shake correction and shift processing program 100 on the RAM 96, the CPU 92 operates as an acquisition unit 200, a calculation unit 202, and a control unit 204. Note that, as will be described in detail later, the shake correction and shift processing is processing that includes the shake correction processing (see FIG. 24) and the shift processing (see FIG. 25).

[0117] 10 , as an example, acquisition unit 200 acquires a shake correction command and a shake amount detection result by shake amount detection sensor 56 as information transmitted from CPU 42 of surveillance camera body 20. The shake correction command is command information requesting shake correction, and the shake amount detection result by shake amount detection sensor 56 is information representing the result of detecting the amount of shake of surveillance camera 10. Acquisition unit 200 also acquires a position detection result by X-axis position sensor 136 and a position detection result by Y-axis position sensor 138. The position detection result by X-axis position sensor 136 is information representing the result of detecting the position of shake correction lens 76 in the X-axis direction, and the position detection result by Y-axis position sensor 138 is information representing the result of detecting the position of shake correction lens 76 in the Y-axis direction.

[0118] When the acquisition unit 200 acquires a shake correction command, the calculation unit 202 calculates, for the X-axis VCM 120 (see FIG. 11 ), an actuation direction and actuation amount for correcting the shake of the image 210 in the X-axis direction, based on the shake amount detection result by the shake amount detection sensor 56. The shake of the image 210 in the X-axis direction includes shake of the image 210 in the +X-axis direction and shake of the image 210 in the -X-axis direction. Specifically, the calculation unit 202 calculates, for the X-axis VCM 120, an actuation direction and actuation amount for returning the X-axis position of the image 210 (shown by a two-dot chain line) blurred by the shake of the surveillance camera 10 to the X-axis position of the image 210 (shown by a solid line) before the shake of the surveillance camera 10 occurred. The actuation direction and actuation amount for correcting the shake of the image 210 in the X-axis direction may be predetermined according to the shake amount detection result by the shake amount detection sensor 56, or may be calculated using various calculation formulas.

[0119] Similarly, when a blur correction command is acquired by the acquisition unit 200, the calculation unit 202 calculates, for the Y-axis VCM 122 (see FIG. 11 ), an operation direction and an operation amount for correcting blur in the Y-axis direction of the image 210, based on the blur amount detection result by the blur amount detection sensor 56. Blur in the Y-axis direction of the image 210 includes blur in the +Y-axis direction of the image 210 and blur in the -Y-axis direction of the image 210. Specifically, the calculation unit 202 calculates, for the Y-axis VCM 122, an operation direction and an operation amount for returning the Y-axis direction position of the image 210 (shown by a two-dot chain line) blurred by the shaking of the surveillance camera 10 to the Y-axis direction position of the image 210 (shown by a solid line) before the shaking of the surveillance camera 10 occurred. The operation direction and operation amount for correcting blur in the X-axis direction of the image 210 may be predetermined according to the blur amount detection result by the blur amount detection sensor 56, or may be calculated using various calculation formulas. Correcting the blur of image 210 not only involves matching the position of image 210 blurred by the shaking of surveillance camera 10 to the position of image 210 before the shaking of surveillance camera 10 occurred, but also involves bringing the position of image 210 blurred by the shaking of surveillance camera 10 closer to the position of image 210 before the shaking of surveillance camera 10 occurred.

[0120] 11 shows an example in which control unit 204 outputs a control command to X-axis VCM driver 104 and a control command to Y-axis VCM driver 106 based on the calculation results of calculation unit 202. Control unit 204 sets the movement direction and movement amount of X-axis VCM 120 calculated by calculation unit 202 as target values, and generates a control command based on the position detection result by X-axis position sensor 136 (see FIG. 10). The control command is output to X-axis VCM driver 104. Control unit 204 also sets the movement direction and movement amount of Y-axis VCM 122 calculated by calculation unit 202 as target values, and generates a control command based on the position detection result by Y-axis position sensor 138 (see FIG. 10). The control command is output to Y-axis VCM driver 106.

[0121] The X-axis VCM driver 104 generates an actuation signal based on a control command generated by the control unit 204. The actuation signal is, for example, a continuous wave. The X-axis VCM 120 is actuated in an actuation direction and by an actuation amount according to the actuation signal. The voltage value of the actuation signal is proportional to the actuation amount of the X-axis VCM 120. When the voltage of the actuation signal is positive, the X-axis VCM 120 acts in a direction to move the image 210 in the +X-axis direction. When the voltage of the actuation signal is negative, the X-axis VCM 120 acts in a direction to move the image 210 in the -X-axis direction. When the image 210 is shaken in the -X-axis direction, the X-axis VCM 120 acts in a direction to move the image 210 in the +X-axis direction. When the image 210 is shaken in the +X-axis direction, the X-axis VCM 120 acts in a direction to move the image 210 in the -X-axis direction. As a result, the blur correction lens 76 moves in a direction that corrects the blur of the image 210 in the X-axis direction, and the blur of the image 210 in the X-axis direction is corrected. In the example shown in FIG. 11, the actuation signal given to the X-axis VCM 120 is shown as a sine wave, but the actuation signal given to the X-axis VCM 120 is a signal generated in response to the blurring of the image 210, and is not limited to a sine wave.

[0122] Similarly, the Y-axis VCM driver 106 generates an actuation signal based on a control command generated by the control unit 204. The actuation signal is, for example, a continuous wave. The Y-axis VCM 122 acts in an actuation direction and by an actuation amount according to the actuation signal. The voltage value of the actuation signal is proportional to the actuation amount of the Y-axis VCM 122. When the voltage of the actuation signal is positive, the Y-axis VCM 122 acts in a direction to move the image 210 in the +Y-axis direction. When the voltage of the actuation signal is negative, the Y-axis VCM 122 acts in a direction to move the image 210 in the -Y-axis direction. When the image 210 is shaken in the -Y-axis direction, the Y-axis VCM 122 acts in a direction to move the image 210 in the +Y-axis direction. When the image 210 is shaken in the +Y-axis direction, the Y-axis VCM 122 acts in a direction to move the image 210 in the -Y-axis direction. As a result, the blur correction lens 76 moves in a direction that corrects the blur of the image 210 in the Y-axis direction, and the blur of the image 210 in the Y-axis direction is corrected. In the example shown in Figure 11, the actuation signal given to the Y-axis VCM 122 is shown as a sine wave as an example, but the actuation signal given to the Y-axis VCM 122 is a signal generated in response to the blurring of the image 210, and is not limited to a sine wave.

[0123] The control of the blur correction drive mechanism 174 by the control unit 204 described above is feedback control based on the blur amount detection result by the blur amount detection sensor 56 (the amount of blur of the surveillance camera 10).

[0124] 12 as an example, the acquisition unit 200 acquires an image shift command and frame period information as information transmitted from the CPU 42 of the surveillance camera main body 20. The acquisition unit 200 also acquires the position detection result from the X-axis position sensor 136 and the position detection result from the Y-axis position sensor 138. The image shift command is command information requesting an image shift. The image shift command is classified into an X-axis image shift command that indicates the shift and shift amount of the image 210 in the +X-axis direction, a Y-axis image shift command that indicates the shift and shift amount of the image 210 in the +Y-axis direction, and an XY-axis image shift command that indicates the shift and shift amount of the image 210 in the +X-axis and +Y-axis directions.

[0125] The shift amount of the image 210 is defined, for example, as a pitch equal to or greater than the pixel pitch of the image sensor 24, or a pitch less than the pixel pitch of the image sensor 24. A pitch equal to or greater than the pixel pitch of the image sensor 24 is, for example, 1 pitch, 1.5 pitches, 2.5 pitches, or 3.5 pitches. When the pixel pitch of the image sensor 24 is p, n is a natural number, and d is a pure decimal, a pitch greater than the pixel pitch of the image sensor 24 is defined as (n+d)×p. Furthermore, a pitch less than the pixel pitch of the image sensor 24 is, for example, 0.25 pitches, 0.5 pitches, or 0.75 pitches. When the pixel pitch of the image sensor 24 is p and D is a decimal less than 1, a pitch less than the pixel pitch of the image sensor 24 is defined as D×p.

[0126] The frame period information is information that defines a frame period synchronized with a timing control signal output from the CPU 42 to the image sensor driver 52 (see FIG. 5). The frame period is a period in which imaging is performed in frame units.

[0127] When the acquisition unit 200 acquires an X-axis image shift command, the calculation unit 202 calculates the actuation amount of the X-axis piezoelectric element 124 for each frame period based on the shift amount of the image 210 indicated by the X-axis image shift command, the frame period indicated by the frame period information, and the position detection result by the X-axis position sensor 136. For example, when the shift amount of the image 210 indicated by the X-axis image shift command is the same as the pixel pitch of the image sensor 24, the calculation unit 202 calculates the actuation amount of the X-axis piezoelectric element 124 for shifting the image 210 by the same pitch as the pixel pitch of the image sensor 24. When the shift amount of the image 210 indicated by the X-axis image shift command is a pitch larger than the pixel pitch of the image sensor 24, the calculation unit 202 calculates the actuation amount of the X-axis piezoelectric element 124 for shifting the image 210 in the +X-axis direction by (n+d)×p. Furthermore, when the shift amount of the image 210 represented by the X-axis image shift command is a pitch less than the pixel pitch of the image sensor 24, the calculation unit 202 calculates the actuation amount of the X-axis piezoelectric element 124 that shifts the image 210 in the +X-axis direction by D×p.

[0128] Similarly, when a Y-axis image shift command is acquired by the acquisition unit 200, the calculation unit 202 calculates the actuation amount of the Y-axis piezoelectric element 126 for each frame period based on the shift amount of the image 210 indicated by the Y-axis image shift command, the frame period indicated by the frame period information, and the position detection result by the Y-axis position sensor 138. For example, when the shift amount of the image 210 indicated by the Y-axis image shift command is the same as the pixel pitch of the image sensor 24, the calculation unit 202 calculates the actuation amount of the Y-axis piezoelectric element 126 for shifting the image 210 by the same pitch as the pixel pitch of the image sensor 24. Furthermore, when the shift amount of the image 210 indicated by the Y-axis image shift command is a pitch larger than the pixel pitch of the image sensor 24, the calculation unit 202 calculates the actuation amount of the Y-axis piezoelectric element 126 for shifting the image 210 in the +Y-axis direction by (n+d)×p. Furthermore, when the shift amount of the image 210 represented by the Y-axis image shift command is a pitch less than the pixel pitch of the image sensor 24, the calculation unit 202 calculates the actuation amount of the X-axis piezoelectric element 124 that shifts the image 210 in the +Y-axis direction by D×p.

[0129] Furthermore, when an XY-axis image shift command is acquired by the acquisition unit 200, the calculation unit 202 calculates the amount of operation of the X-axis piezoelectric element 124 in the same manner as when an X-axis image shift command is acquired by the acquisition unit 200, and calculates the amount of operation of the Y-axis piezoelectric element 126 in the same manner as when a Y-axis image shift command is acquired by the acquisition unit 200.

[0130] 13, for example, the control unit 204 generates a control command for each frame period according to the amount of operation of the X-axis piezoelectric element 124 calculated by the calculation unit 202. The control command is output to the X-axis piezoelectric element driver 108. The control unit 204 also generates a control command for each frame period according to the amount of operation of the Y-axis piezoelectric element 126 calculated by the calculation unit 202. The control command is output to the Y-axis piezoelectric element driver 110 in synchronization with frame period information.

[0131] The X-axis piezoelectric element driver 108 generates an actuation signal based on a control command generated by the control unit 204. The actuation signal is, for example, a pulse wave. The voltage value of the actuation signal is proportional to the actuation amount of the X-axis piezoelectric element 124. The period of the actuation signal is synchronized with the frame period defined by the frame period information. The X-axis piezoelectric element 124 acts by an actuation amount according to the actuation signal. As a result, the blur correction lens 76 moves in a direction that shifts the image 210 in the +X-axis direction for each frame period, and the image 210 is shifted in the +X-axis direction.

[0132] Similarly, the Y-axis piezoelectric element driver 110 generates an actuation signal based on a control command generated by the control unit 204. The actuation signal is, for example, a pulse wave. The voltage value of the actuation signal is proportional to the actuation amount of the Y-axis piezoelectric element 126. The period of the actuation signal is synchronized with the frame period defined by the frame period information. The Y-axis piezoelectric element 126 acts by an actuation amount corresponding to the actuation signal. As a result, the blur correction lens 76 moves in a direction that shifts the image 210 in the +Y-axis direction for each frame period, and the image 210 is shifted in the +Y-axis direction.

[0133] 14, the control unit 204 may repeatedly execute control to selectively switch between the presence or absence of image shift in the +X-axis direction and the presence or absence of image shift in the +Y-axis direction, with four frame periods 1 to 4 as one set. The presence or absence of image shift in the +X-axis direction corresponds to the presence or absence of power of the X-axis piezoelectric element 124 (see FIG. 13), and the presence or absence of image shift in the +Y-axis direction corresponds to the presence or absence of power of the Y-axis piezoelectric element 126 (see FIG. 13). By executing control to selectively switch between the presence or absence of power of the X-axis piezoelectric element 124 and the presence or absence of power of the Y-axis piezoelectric element 126, control to selectively switch between the presence or absence of image shift in the +X-axis direction and the presence or absence of image shift in the +Y-axis direction is realized.

[0134] In the example shown in FIG. 14, for example, in frame period 1, there is a combination of no image shift in the +X-axis direction and no image shift in the +Y-axis direction, in frame period 2, there is a combination of an image shift in the +X-axis direction and no image shift in the +Y-axis direction, in frame period 3, there is a combination of an image shift in the +X-axis direction and an image shift in the +Y-axis direction, and in frame period 4, there is a combination of an image shift in the +X-axis direction and an image shift in the +Y-axis direction. none And the image shift in the +Y direction is Yes In this way, the image is shifted for each of frame periods 1 to 4, and image sensor 24 (see FIG. 13) is caused to capture images in accordance with the image shift, thereby obtaining a plurality of frame images 212 corresponding to each of frame periods 1 to 4. Then, CPU 42 of surveillance camera main body 20 combines the images 212 of the plurality of frames to obtain a composite image 214.

[0135] The composite image 214 is obtained, for example, in the following manner. That is, when the amount of image shift is the same pitch as the pixel pitch of the image sensor 24, a plurality of image pixels forming one image of the images 212 of the multiple frames are superimposed on a plurality of image pixels forming another image, thereby obtaining the composite image 214 from the images 212 of the multiple frames. When the amount of image shift is a pitch larger than the pixel pitch of the image sensor 24 (a pitch expressed by the formula (n+d)×p) or when the amount of image shift is a pitch smaller than the pixel pitch of the image sensor 24, a plurality of image pixels forming one image of the images 212 of the multiple frames are allocated between a plurality of image pixels forming one image of the images 212 of the multiple frames, thereby obtaining a high-resolution image as the composite image 214 from the images 212 of the multiple frames.

[0136] As an example, as shown in FIG. 15, the control unit 204 may repeatedly execute control to selectively switch between the combination of whether or not to shift the image in the +X-axis direction and the combination of whether or not to shift the image in the +Y-axis direction, with three frame periods 1 to 3 being one set.

[0137] 15, for example, in frame period 1, there is a combination of no image shift in the +X-axis direction and no image shift in the +Y-axis direction, in frame period 2 there is a combination of image shift in the +X-axis direction and no image shift in the +Y-axis direction, and in frame period 3 there is a combination of no image shift in the +X-axis direction and image shift in the +Y-axis direction. In this way, the image is shifted for each of frame periods 1 to 3, and image sensor 24 (see FIG. 13) is caused to capture images in accordance with the image shift, thereby obtaining a plurality of frame images 212 corresponding to each of frame periods 1 to 3. Then, the plurality of frame images 212 are combined by CPU 42 of surveillance camera main body 20 to obtain a composite image 214.

[0138] As another example, as shown in FIG. 16, the control unit 204 may repeatedly execute control to selectively switch between the combination of whether or not to shift the image in the +X-axis direction and the combination of whether or not to shift the image in the +Y-axis direction, with two frame periods 1 to 2 forming one set.

[0139] 16, for example, in frame period 1, there is a combination of no image shift in the +X-axis direction and no image shift in the +Y-axis direction, and in frame period 2, there is a combination of an image shift in the +X-axis direction and an image shift in the +Y-axis direction. In this way, the image is shifted every frame period 1 to 2, and image sensor 24 (see FIG. 13) is caused to capture images in accordance with the image shift, thereby obtaining a plurality of frame images 212 corresponding to each of frame periods 1 to 2. Then, the plurality of frame images 212 are combined by CPU 42 of surveillance camera main body 20 to obtain a composite image 214.

[0140] The control of the shift drive mechanism 188 by the control unit 204 described above is not based on the blur amount detection result (amount of blur of the surveillance camera 10) by the blur amount detection sensor 56, but is a sequence control based on a predetermined shift order (see Figures 14 to 16).

[0141] Incidentally, when the surveillance camera 10 (see FIG. 1, etc.) is shaken, control may be performed to shift the image 210 as shown in FIG. 13. In this case, the blur correction lens 76 moves as follows.

[0142] 17 shows an example in which the image 210 is shifted in the +X-axis direction when blurring occurs in the -X-axis direction of the image 210. In this example, the shift drive mechanism 188 moves the blur correction lens 76 in the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76 (the +X-axis direction), and as a result, the blur correction lens 76 moves by an amount obtained by adding the amount of movement of the blur correction lens 76 in the +X-axis direction by the shift drive mechanism 188 to the amount of movement of the blur correction lens 76 in the +X-axis direction by the blur correction drive mechanism 174. As a result, the image 210 moves by an amount of movement A obtained by adding the amount of movement A2 for shifting the image 210 to the amount of movement A1 for correcting blur of the image 210, and the image 210 is shifted to the position specified by the X-axis image shift command.

[0143] 18 shows an example in which the image 210 is shifted in the +X-axis direction when blurring occurs in the image 210 in the +X-axis direction. In this example, the shift drive mechanism 188 moves the blur correction lens 76 in the direction opposite (the +X-axis direction) to the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76 (the -X-axis direction), thereby moving the blur correction lens 76 by an amount of movement obtained by subtracting the amount of movement of the blur correction lens 76 in the +X-axis direction by the shift drive mechanism 188 from the amount of movement of the blur correction lens 76 in the -X-axis direction by the blur correction drive mechanism 174. As a result, the image 210 moves by an amount of movement B obtained by subtracting an amount of movement B2 for shifting the image 210 from an amount of movement B1 for correcting blur of the image 210, and the image 210 is shifted to the position specified by the X-axis image shift command.

[0144] The above is a specific example of the case where the image 210 is shifted in the +X-axis direction by the X-axis piezoelectric element 124 moving the blur correction lens 76 in the +X-axis direction. A specific example of the case where the image 210 is shifted in the +Y-axis direction by the Y-axis piezoelectric element 126 moving the blur correction lens 76 in the +Y-axis direction is as follows.

[0145] 19 shows an example in which the image 210 is shifted in the +Y-axis direction when blurring occurs in the -Y-axis direction of the image 210. In this example, the shift drive mechanism 188 moves the blur correction lens 76 in the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76 (the +Y-axis direction), and as a result, the blur correction lens 76 moves by an amount obtained by adding the amount of movement of the blur correction lens 76 in the +Y-axis direction by the shift drive mechanism 188 to the amount of movement of the blur correction lens 76 in the +Y-axis direction by the blur correction drive mechanism 174. As a result, the image 210 moves by an amount C obtained by adding the amount of movement C2 for shifting the image 210 to the amount of movement C1 for correcting blur of the image 210, and the image 210 is shifted to the position specified by the Y-axis image shift command.

[0146] 20 shows an example in which the image 210 is shifted in the +Y-axis direction when blurring occurs in the image 210 in the +Y-axis direction. In this example, the shift drive mechanism 188 moves the blur correction lens 76 in the direction opposite (the +Y-axis direction) to the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76 (the -Y-axis direction), thereby moving the blur correction lens 76 by an amount of movement obtained by subtracting the amount of movement of the blur correction lens 76 in the +Y-axis direction by the shift drive mechanism 188 from the amount of movement of the blur correction lens 76 in the -Y-axis direction by the blur correction drive mechanism 174. As a result, the image 210 moves by an amount of movement D obtained by subtracting the amount of movement D2 for shifting the image 210 from the amount of movement D1 for correcting blur of the image 210, and the image 210 is shifted to the position specified by the Y-axis image shift command.

[0147] 21 shows an example of the movement of the blur correction lens 76, which moves by an amount obtained by superimposing the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 on the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174 as described above. The upper graph of Fig. 21 shows the movement of the blur correction lens 76, which moves by an amount obtained by superimposing the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 on the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174, and the lower graph of Fig. 21 shows the amount of movement of the blur correction lens 76 caused by the application of power by the shift drive mechanism 188 (the amount of movement of the blur correction lens 76 depending on whether or not an image shift occurs). The vertical axis of each graph represents the direction and amount of movement of the blur correction lens 76, and the horizontal axis of each graph represents time.

[0148] 21 , when the shift drive mechanism 188 moves the blur correction lens 76 in the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76 (that is, when there is an image shift and the direction in which the shift drive mechanism 188 moves the blur correction lens 76 is the same as the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76), the blur correction lens 76 moves by an amount obtained by adding the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 to the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174. When there is no image shift, the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 is not added to the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174, and the blur correction lens 76 moves by the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174.

[0149] On the other hand, when the shift drive mechanism 188 moves the blur correction lens 76 in the direction opposite to the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76 (in other words, when there is an image shift and the direction in which the shift drive mechanism 188 moves the blur correction lens 76 is opposite to the direction in which the blur correction lens 76 is moved by the blur correction drive mechanism 174), the blur correction lens 76 moves by an amount obtained by subtracting the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 from the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174. When there is no image shift, the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 is not subtracted from the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174, and the blur correction lens 76 moves by the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174. The amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174 is greater than the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 .

[0150] 21, for the sake of convenience, in order to easily understand the direction and amount of movement of the blur correction lens 76, half the period of the period of movement of the blur correction lens 76 by the blur correction drive mechanism 174 coincides with the frame period, but the movement of the blur correction lens 76 by the blur correction drive mechanism 174 is not limited to this. In other words, because the movement of the blur correction lens 76 by the blur correction drive mechanism 174 is determined in accordance with image blur, there are naturally cases where the period of the movement of the blur correction lens 76 by the blur correction drive mechanism 174 does not synchronize with the frame period, as shown in, for example, FIG.

[0151] 17 to 21 show cases where the shift drive mechanism 188 moves the blur correction lens 76 in the +X-axis direction and the +Y-axis direction, but if the shift drive mechanism 188 moves the blur correction lens 76 only in the +X-axis direction, the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 may be superimposed on the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174, as described above. Similarly, if the shift drive mechanism 188 moves the blur correction lens 76 only in the +Y-axis direction, the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 may be superimposed on the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174, as described above.

[0152] Also, as an example, as shown in FIG. 23, when the shift drive mechanism 188 moves the blur correction lens 76 in at least one of the -X-axis direction and the -Y-axis direction, the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 may be superimposed on the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174, as described above.

[0153] Next, the operation of the surveillance camera 10 according to the first embodiment (the behavior of the surveillance camera 10) will be described with reference to FIGS.

[0154] First, the blur correction process of the blur correction / shift process will be described. The CPU 92 of the lens device 70 determines whether a blur correction command transmitted from the CPU 42 of the surveillance camera body 20 has been received by the transmission / reception interface (not shown) of the lens device 70, and if the determination is affirmative, executes the blur correction process shown in FIG.

[0155] First, in step ST100, acquisition unit 200 (see FIG. 10) acquires a shake correction command transmitted from CPU 42 of surveillance camera body 20. Then, in step ST102, acquisition unit 200 acquires the shake amount detection result transmitted from CPU 42 of surveillance camera body 20. Furthermore, acquisition unit 200 acquires the position detection result by X-axis position sensor 136 and the position detection result by Y-axis position sensor 138.

[0156] In the next step ST104, the calculation unit 202 calculates, for the X-axis VCM 120, an operation direction and an operation amount for correcting blurring of the image 210 in the X-axis direction, based on the blur amount detection result by the blur amount detection sensor 56. Similarly, the calculation unit 202 calculates, for the Y-axis VCM 122, an operation direction and an operation amount for correcting blurring of the image 210 in the Y-axis direction, based on the blur amount detection result by the blur amount detection sensor 56.

[0157] In the next step ST106, the control unit 204 (see FIG. 11) teeth, The movement direction and movement amount of X-axis VCM 120 calculated by calculation unit 202 are used as target values, and X-axis VCM 120 is controlled based on the position detection result by X-axis position sensor 136 (see FIG. 10). For example, if image 210 is shaken in the -X-axis direction, control unit 204 operates X-axis VCM 120 in a direction to move image 210 in the +X-axis direction, and if image 210 is shaken in the +X-axis direction, control unit 204 operates X-axis VCM 120 in a direction to move image 210 in the -X-axis direction. As a result, blur correction lens 76 moves in a direction that corrects blur of image 210 in the X-axis direction, and blur of image 210 in the X-axis direction is corrected.

[0158] Similarly, control unit 204 sets the movement direction and movement amount of Y-axis VCM 122 calculated by calculation unit 202 as target values, and controls Y-axis VCM 122 based on the position detection result by Y-axis position sensor 138 (see FIG. 10). For example, if image 210 is shaken in the -Y-axis direction, control unit 204 operates Y-axis VCM 122 in a direction to move image 210 in the +Y-axis direction, and if image 210 is shaken in the +Y-axis direction, control unit 204 operates Y-axis VCM 122 in a direction to move image 210 in the -Y-axis direction. As a result, blur correction lens 76 moves in a direction that corrects blur of image 210 in the Y-axis direction, and blur of image 210 in the Y-axis direction is corrected.

[0159] Next, the shift process of the blur correction / shift process will be described. The CPU 92 of the lens device 70 determines whether or not an image shift command transmitted from the CPU 42 of the surveillance camera body 20 has been received by a transmission / reception interface (not shown) of the lens device 70, and if the determination is affirmative, executes the shift process shown in FIG.

[0160] First, in step ST110, the acquisition unit 200 (see FIG. 12) acquires an image shift command transmitted from the CPU 42 of the surveillance camera main body 20. The image shift command is classified into an X-axis image shift command that indicates the shift of the image in the X-axis direction and the shift amount, a Y-axis image shift command that indicates the shift of the image in the Y-axis direction and the shift amount, and an XY-axis image shift command that indicates the shift of the image in the X-axis direction and the shift amount. Furthermore, in step ST112, the acquisition unit 200 acquires frame period information transmitted from the CPU 42 of the surveillance camera main body 20. Furthermore, the acquisition unit 200 acquires the position detection results from the X-axis position sensor 136 and the Y-axis position sensor 138.

[0161] In the next step ST114, when the acquisition unit 200 acquires an X-axis image shift command, the calculation unit 202 calculates the actuation amount of the X-axis piezoelectric element 124 for each frame period based on the image shift amount indicated by the X-axis image shift command, the frame period indicated by the frame period information, and the position detection result by the X-axis position sensor 136.

[0162] Similarly, when a Y-axis image shift command is acquired by the acquisition unit 200, the calculation unit 202 calculates the actuation amount of the Y-axis piezoelectric element 126 for each frame period based on the image shift amount represented by the Y-axis image shift command, the frame period represented by the frame period information, and the position detection result by the Y-axis position sensor 138.

[0163] Furthermore, when an XY-axis image shift command is acquired by the acquisition unit 200, the calculation unit 202 calculates the amount of operation of the X-axis piezoelectric element 124 in the same manner as when an X-axis image shift command is acquired by the acquisition unit 200, and calculates the amount of operation of the Y-axis piezoelectric element 126 in the same manner as when a Y-axis image shift command is acquired by the acquisition unit 200.

[0164] In the next step ST116, when the acquisition unit 200 acquires an X-axis image shift command, the control unit 204 (see FIG. 13) controls the X-axis piezoelectric element 124 based on the amount of operation of the X-axis piezoelectric element 124 calculated by the calculation unit 202. As a result, the blur correction lens 76 moves in a direction that shifts the image 210 in the +X-axis direction for each frame period, and the image 210 is shifted in the +X-axis direction.

[0165] Similarly, when a Y-axis image shift command is acquired by the acquisition unit 200, the control unit 204 controls the Y-axis piezoelectric element 126 based on the amount of operation of the Y-axis piezoelectric element 126 calculated by the calculation unit 202. As a result, the blur correction lens 76 moves in a direction that shifts the image 210 in the +Y-axis direction for each frame period, and the image 210 is shifted in the +Y-axis direction.

[0166] Furthermore, when an XY-axis image shift command is acquired by the acquisition unit 200, the control unit 204 controls the X-axis piezoelectric element 124 based on the amount of operation of the X-axis piezoelectric element 124 calculated by the calculation unit 202, and controls the Y-axis piezoelectric element 126 based on the amount of operation of the Y-axis piezoelectric element 126 calculated by the calculation unit 202. As a result, the blur correction lens 76 moves in a direction that shifts the image 210 in the +X-axis direction and the +Y-axis direction for each frame period, and the image 210 is shifted in the +X-axis direction and the +Y-axis direction.

[0167] The blur correction process and the shift process are performed independently of each other. Therefore, when the surveillance camera 10 (see FIG. 1, etc.) is shaken and control is performed to shift the image 210 as shown in FIG. 13, the blur correction lens 76 moves as follows.

[0168] 17, when image 210 is blurred in the -X-axis direction and is shifted in the +X-axis direction, blur correction lens 76 moves by an amount obtained by adding the amount of movement of blur correction lens 76 in the +X-axis direction by shift drive mechanism 188 to the amount of movement of blur correction lens 76 in the +X-axis direction by blur correction drive mechanism 174. As a result, image 210 moves by amount of movement A obtained by adding amount of movement A2 for shifting image 210 to amount of movement A1 for correcting blur of image 210, and image 210 is shifted to the position specified by the X-axis image shift command.

[0169] 18, when image 210 is blurred in the +X-axis direction and is shifted in the +X-axis direction, blur correction lens 76 moves by an amount obtained by subtracting the amount of movement of blur correction lens 76 in the +X-axis direction by shift drive mechanism 188 from the amount of movement of blur correction lens 76 in the -X-axis direction by blur correction drive mechanism 174. As a result, image 210 moves by amount of movement B obtained by subtracting amount of movement B2 for shifting image 210 from amount of movement B1 for correcting blur of image 210, and image 210 is shifted to the position specified by the X-axis image shift command.

[0170] 19, when image 210 is blurred in the -Y-axis direction and is shifted in the +Y-axis direction, blur correction lens 76 moves by an amount obtained by adding the amount of movement of blur correction lens 76 in the +Y-axis direction by shift drive mechanism 188 to the amount of movement of blur correction lens 76 in the +Y-axis direction by blur correction drive mechanism 174. As a result, image 210 moves by amount of movement C obtained by adding amount of movement C2 for shifting image 210 to amount of movement C1 for correcting blur of image 210, and image 210 is shifted to the position specified by the Y-axis image shift command.

[0171] 20, when image 210 is blurred in the +Y-axis direction and is shifted in the +Y-axis direction, blur correction lens 76 moves by an amount obtained by subtracting the amount of movement of blur correction lens 76 in the +Y-axis direction by shift drive mechanism 188 from the amount of movement of blur correction lens 76 in the -Y-axis direction by blur correction drive mechanism 174. As a result, image 210 moves by an amount of movement D obtained by subtracting the amount of movement D2 for shifting image 210 from the amount of movement D1 for correcting blur of image 210, and image 210 is shifted to the position specified by the Y-axis image shift command.

[0172] The method of operating the surveillance camera 10 described above with reference to FIGS. 24 and 25 is an example of a "method of operating an imaging device" according to the technology of the present disclosure. Also, the method of operating the lens device 70 included in the method of operating the surveillance camera 10 described above with reference to FIGS. 24 and 25 is an example of a "method of operating an imaging device" according to the technology of the present disclosure. of the equipment This is an example of an "operation method."

[0173] Next, the effects of the first embodiment will be described.

[0174] 7 and 8, the lens device 70 includes a blur correction / shift drive mechanism 150. The blur correction / shift drive mechanism 150 includes a blur correction drive mechanism 174 that moves the blur correction lens 76 in a direction in which image blur is corrected, and a shift drive mechanism 188 that moves the blur correction lens 76 in a direction in which the image is shifted. Therefore, for example, the blur correction drive mechanism 174 that moves the blur correction lens 76 to correct image blur can perform image blur correction and image shifting with greater precision than when the blur correction lens 76 is moved to shift the image.

[0175] 10 to 13, the CPU 92 of the lens device 70 controls the blur correction drive mechanism 174 to move the blur correction lens 76 in a direction in which image blur is corrected, and also controls the shift drive mechanism 188 to move the blur correction lens 76 in a direction in which the image is shifted. Therefore, the CPU 92 can control the blur correction drive mechanism 174 and the shift drive mechanism 188 within the lens device 70.

[0176] 17 to 20, in the lens device 70, when the shift drive mechanism 188 moves the blur correction lens 76 in the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76, the blur correction lens 76 moves by an amount obtained by adding the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 to the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174. Therefore, it is possible to shift the image to a position specified by the image shift command. In the lens device 70, when the shift drive mechanism 188 moves the blur correction lens 76 in the direction opposite to the direction in which the blur correction drive mechanism 174 moves the blur correction lens 76, the blur correction lens 76 moves by an amount obtained by subtracting the amount of movement of the blur correction lens 76 by the shift drive mechanism 188 from the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 174. It is possible to shift the image to a position specified by the image shift command.

[0177] 13, the CPU 92 of the lens device 70 controls the shift drive mechanism 188 to move the blur correction lens 76 in the direction in which the image is shifted in accordance with frame-by-frame imaging by the image sensor 24 (for example, for each frame of imaging). Therefore, the image can be shifted in accordance with frame-by-frame imaging by the image sensor 24.

[0178] 13, the CPU 92 of the lens device 70 controls the shift drive mechanism 188 to move the blur correction lens 76 to a position where the image is shifted by a pitch equal to or greater than the pixel pitch of the image sensor 24 or a pitch less than the pixel pitch of the image sensor 24. Therefore, as an example, as shown in FIG. 12, a composite image 214 can be obtained by combining the obtained images 212 of multiple frames.

[0179] 13, the shift drive mechanism 188 has an X-axis piezoelectric element 124 and a Y-axis piezoelectric element 126. The X-axis piezoelectric element 124 applies power to the blur correction lens 76 along the X-axis direction, thereby moving the blur correction lens 76, and the Y-axis piezoelectric element 126 applies power to the blur correction lens 76 along the Y-axis direction, thereby moving the blur correction lens 76. The CPU 92 of the lens device 70 then controls the shift drive mechanism 188 to selectively switch between the presence or absence of power of the X-axis piezoelectric element 124 and the presence or absence of power of the Y-axis piezoelectric element 126 (see FIGS. 14 to 16). Therefore, images with different shift amounts in the X-axis and Y-axis directions can be obtained according to the image capture frame by frame.

[0180] 13, the X-axis piezoelectric element 124 applies power to the blur correction lens 76 along the X-axis direction, thereby moving the blur correction lens 76, and the Y-axis piezoelectric element 126 applies power to the blur correction lens 76 along the Y-axis direction, thereby moving the blur correction lens 76. Therefore, the X-axis piezoelectric element 124 and the Y-axis piezoelectric element 126 can move the blur correction lens 76 independently in the X-axis and Y-axis directions.

[0181] 7 and 8, the blur correction / shift drive mechanism 150 includes a holding member 152 that holds the blur correction lens 76, a first support member 154 that supports the holding member 152 movably along the XY coordinate plane, and a second support member 156 that supports the first support member 154 movably along the XY coordinate plane. The blur correction drive mechanism 174 is provided between the holding member 152 and the first support member 154, and the shift drive mechanism 188 is provided between the first support member 154 and the second support member 156. Therefore, the movement of the blur correction lens 76 to correct image blur and the movement of the blur correction lens 76 to shift the image can be performed independently.

[0182] 7 and 8, the blur correction drive mechanism 174 has a voice coil motor, and the shift drive mechanism 188 has a piezoelectric element. Therefore, with a simple configuration, it is possible to move the blur correction lens 76 to correct image blur and to move the blur correction lens 76 to shift the image.

[0183] 7 and 8, the shift drive mechanism 188 has an X-axis leaf spring 158 disposed at a position facing the X-axis piezoelectric element 124. Therefore, when the X-axis piezoelectric element 124 is stopped, the vibration correction lens 76 is moved in the X-axis direction by the elastic force of the X-axis leaf spring 158. of Similarly, the shift drive mechanism 188 has a Y-axis leaf spring 160 disposed at a position facing the Y-axis piezoelectric element 126. Therefore, when the Y-axis piezoelectric element 126 is stopped, the vibration correction lens 76 is returned to its original position before being moved in the Y-axis direction by the elastic force of the Y-axis leaf spring 160. of can be returned to position.

[0184] 7 and 8, the blur correction drive mechanism 174 has an X-axis VCM 120 and a Y-axis VCM 122. The X-axis VCM 120 is provided between the holding member 152 and the first support member 154, and generates power in the X-axis direction. The Y-axis VCM 122 is provided between the holding member 152 and the first support member 154, and generates power in the Y-axis direction. Therefore, the X-axis VCM 120 and the Y-axis VCM 122 can move the blur correction lens 76 independently in the X-axis and Y-axis directions.

[0185] 7 and 8, the shift drive mechanism 188 has an X-axis piezoelectric element 124 and a Y-axis piezoelectric element 126. The X-axis piezoelectric element 124 is provided between the first support member 154 and the second support member 156, and generates power in the X-axis direction. The Y-axis piezoelectric element 126 is provided between the first support member 154 and the second support member 156, and generates power in the Y-axis direction. Therefore, the X-axis piezoelectric element 124 and the Y-axis piezoelectric element 126 can move the blur correction lens 76 in the X-axis and Y-axis directions independently.

[0186] 3, the filter unit 80 of the lens device 70 includes a plurality of BPFs 88. The filter unit 80 is disposed closer to the subject than the image sensor 24, and the plurality of BPFs 88 transmit near-infrared light contained in the light. Therefore, a near-infrared light image can be obtained by forming an image of the near-infrared light on the image sensor 24.

[0187] 14 to 16, the CPU 42 of the surveillance camera main body 20 causes the image sensor 24 to capture images in accordance with the shift of the image (for example, each time the image shifts), and combines the captured images 212 into a plurality of frames. Thus, a composite image 214 can be obtained.

[0188] [Second embodiment] Next, a second embodiment will be described. As an example, as shown in Figures 26 and 27, the second embodiment uses a blur correction / shift drive mechanism 250. The blur correction / shift drive mechanism 250 has the following configuration changes compared to the blur correction / shift drive mechanism 150 (see Figures 7 and 8) of the first embodiment. In the second embodiment, the same elements and members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

[0189] The shake correction / shift drive mechanism 250 according to the second embodiment includes a holding member 252, a first support member 254, a second support member 256, an X-axis VCM 120, a Y-axis VCM 122, an X-axis piezoelectric element 124, a Y-axis piezoelectric element 126, an X-axis leaf spring 158, and a Y-axis leaf spring 160. The configurations of the X-axis VCM 120, the Y-axis VCM 122, the X-axis piezoelectric element 124, the Y-axis piezoelectric element 126, the X-axis leaf spring 158, and the Y-axis leaf spring 160 are the same as those in the first embodiment. However, the arrangement of the X-axis piezoelectric element 124, the Y-axis piezoelectric element 126, the X-axis leaf spring 158, and the Y-axis leaf spring 160 differs from that in the first embodiment.

[0190] The holding member 252 is formed in an annular shape. A blur correction lens 76 is provided inside the holding member 252. The outer periphery of the blur correction lens 76 is fixed to the inner periphery of the holding member 252. The blur correction lens 76 is held by the holding member 252 by having its outer periphery fixed to the inner periphery of the holding member 252. When the X-axis VCM 120, the Y-axis VCM 122, the X-axis piezoelectric element 124, and the Y-axis piezoelectric element 126 are not operating and no blurring occurs in the surveillance camera 10, the center of the blur correction lens 76 is located on the optical axis OA.

[0191] The first support member 254 is formed in a generally plate-like shape. The first support member 254 is disposed with its thickness oriented in the Z-axis direction. A hole 266 is formed in the first support member 254, penetrating it in the Z-axis direction. The hole 266 has a circular cross-section as viewed in the axial direction, and is formed with a diameter equal to or larger than that of the holding member 252. The X-axis piezoelectric element 124, the Y-axis piezoelectric element 126, the X-axis leaf spring 158, and the Y-axis leaf spring 160 are provided between the holding member 252 and the first support member 254. The holding member 252 is supported by the first support member 254 via the X-axis piezoelectric element 124, the Y-axis piezoelectric element 126, the X-axis leaf spring 158, and the Y-axis leaf spring 160 so as to be movable along the XY coordinate plane. When the X-axis VCM 120, Y-axis VCM 122, X-axis piezoelectric element 124, and Y-axis piezoelectric element 126 are not operating and the surveillance camera 10 is not shaking, the center of the hole 266 is located on the optical axis OA.

[0192] The second support member 256 is fixed to the housing 70A of the lens device 70. The housing 70A of the lens device 70 is a member that supports the objective lens 72, zoom lens 74, diaphragm 78, filter unit 80, and master lens 82 (see FIG. 2) described above in addition to the blur correction lens 76 and the blur correction / shift drive mechanism 250, and the second support member 256 is fixed to the housing 70A of the lens device 70.

[0193] As an example, the second support member 256 is formed in a generally plate-like shape. The second support member 256 is disposed with its plate thickness direction in the Z-axis direction. The second support member 256 is disposed opposite the first support member 254 in the Z-axis direction. A hole 272 is formed in the second support member 256, penetrating it in the Z-axis direction. The cross section of the hole 272 is circular when viewed from the axial direction. The hole 272 is formed with a diameter equal to or larger than the diameter of the blur correction lens 76. The center of the hole 272 is located on the optical axis OA. A sliding member (not shown), such as a ball, is disposed between the first support member 254 and the second support member 256, thereby supporting the first support member 254 by the second support member 256 so that it can move along the XY coordinate plane.

[0194] The X-axis VCM 120 and the Y-axis VCM 122 form a blur correction drive mechanism 274. The blur correction drive mechanism 274 is an example of a "first drive mechanism" according to the technology of the present disclosure. The blur correction drive mechanism 274 is provided between the first support member 254 and the second support member 256. The blur correction drive mechanism 274 applies power to the blur correction lens 76 along the XY coordinate plane in a direction in which image blur is corrected, thereby moving the blur correction lens 76 along the XY coordinate plane. That is, the X-axis VCM 120 applies power to the blur correction lens 76 along the X-axis direction in a direction in which image blur in the X-axis direction is corrected, thereby moving the blur correction lens 76 along the X-axis direction, and the Y-axis VCM 122 applies power to the blur correction lens 76 along the Y-axis direction in a direction in which image blur in the Y-axis direction is corrected, thereby moving the blur correction lens 76 along the Y-axis direction.

[0195] As an example, the X-axis VCM 120 is disposed in the +X-axis direction relative to the blur correction lens 76. However, the X-axis VCM 120 may also be disposed in the -X-axis direction relative to the blur correction lens 76. The X-axis VCM 120 is provided between the first support member 254 and the second support member 256 in the Z-axis direction. As an example, the X-axis VCM 120 is a flat coil type voice coil motor, and has a coil 176 and a pair of magnets 178 and 180.

[0196] As an example, the coil 176 is fixed to the first support member 254, and the pair of magnets 178 and 180 are fixed to the second support member 256. Alternatively, the coil 176 may be fixed to the second support member 256, and the pair of magnets 178 and 180 may be fixed to the first support member 254. The coil 176 is arranged with its axial direction aligned in the Z-axis direction, and the pair of magnets 178 and 180 are arranged side by side in the X-axis direction. The north pole of the magnet 178 faces the coil 176, and the south pole of the magnet 180 faces the coil 176.

[0197] The X-axis VCM 120 generates power in the X-axis direction. The direction of the current flowing through the coil 176 is switched by the X-axis VCM driver 104 (see FIG. 6). Switching the direction of the current flowing through the coil 176 switches the direction of the force that the coil 176 receives from the pair of magnets 178 and 180. When the coil 176 receives a force in the +X-axis direction from the pair of magnets 178 and 180, power is applied to the first support member 254, the holding member 252, and the blur correction lens 76 in the +X-axis direction, and the first support member 254, the holding member 252, and the blur correction lens 76 move in the +X-axis direction. When the coil 176 receives a force in the -X-axis direction from the pair of magnets 178 and 180, power is applied to the first support member 254, the holding member 252, and the blur correction lens 76 in the -X-axis direction, and the first support member 254, the holding member 252, and the blur correction lens 76 move in the -X-axis direction. By applying power in this way from the X-axis VCM 120, the blur correction lens 76 moves in the X-axis direction, and blur of the image in the X-axis direction is corrected.

[0198] As an example, the Y-axis VCM 122 is disposed in the −Y-axis direction with respect to the blur correction lens 76. However, the Y-axis VCM 122 may also be disposed in the +Y-axis direction with respect to the blur correction lens 76. The Y-axis VCM 122 is provided between the first support member 254 and the second support member 256 in the Z-axis direction. As an example, the Y-axis VCM 122 is a flat coil type voice coil motor, and has a coil 182 and a pair of magnets 184 and 186.

[0199] As an example, the coil 182 is fixed to the first support member 254, and the pair of magnets 184 and 186 are fixed to the second support member 256. Alternatively, the coil 182 may be fixed to the second support member 256, and the pair of magnets 184 and 186 may be fixed to the first support member 254. The coil 182 is arranged with its axial direction aligned in the Z-axis direction, and the pair of magnets 184 and 186 are arranged side by side in the Y-axis direction. The north pole of the magnet 184 faces the coil 182, and the south pole of the magnet 186 faces the coil 182.

[0200] Y-axis VCM 122 generates power in the Y-axis direction. The direction of the current flowing through coil 182 is switched by Y-axis VCM driver 106 (see FIG. 6). Switching the direction of the current flowing through coil 182 switches the direction of the force that coil 182 receives from the pair of magnets 184 and 186. When coil 182 receives force in the +Y-axis direction from the pair of magnets 184 and 186, power is imparted to first support member 254, holding member 252, and blur correction lens 76 in the +Y-axis direction, and first support member 254, holding member 252, and blur correction lens 76 move in the +Y-axis direction. When the coil 182 receives a force in the -Y-axis direction from the pair of magnets 184 and 186, power is applied to the first support member 254, the holding member 252, and the blur correction lens 76 in the -Y-axis direction, and the first support member 254, the holding member 252, and the blur correction lens 76 move in the -Y-axis direction. By applying power in this way from the Y-axis VCM 122, the blur correction lens 76 moves in the Y-axis direction, and image blur in the Y-axis direction is corrected.

[0201] As an example, the X-axis VCM 120 is a flat coil type voice coil motor in which the coil 176 and the pair of magnets 178 and 180 face each other in the axial direction of the coil 176, but the X-axis VCM 120 may be a square coil type voice coil motor in which the coil 176 is disposed between the pair of magnets 178 and 180 that face each other in the radial direction of the coil 176. Similarly, as an example, the Y-axis VCM 122 is a flat coil type voice coil motor in which the coil 182 and the pair of magnets 184 and 186 face each other in the axial direction of the coil 182, but the Y-axis VCM 122 may be a square coil type voice coil motor in which the coil 182 is disposed between the pair of magnets 184 and 186 that face each other in the radial direction of the coil 182.

[0202] The X-axis piezoelectric element 124, the Y-axis piezoelectric element 126, the X-axis leaf spring 158, and the Y-axis leaf spring 160 form a shift drive mechanism 288. The shift drive mechanism 288 is an example of a "second drive mechanism" according to the technology of the present disclosure.

[0203] The shift drive mechanism 288 is provided between the holding member 252 and the first support member 254. The shift drive mechanism 288 applies power to the blur correction lens 76 along the XY coordinate plane in a direction in which the image is shifted, thereby moving the blur correction lens 76 along the XY coordinate plane. That is, the X-axis piezoelectric element 124 applies power to the blur correction lens 76 along the X-axis direction in a direction in which the image is shifted along the X-axis direction, thereby moving the blur correction lens 76 along the X-axis direction, and the Y-axis piezoelectric element 126 applies power to the blur correction lens 76 along the Y-axis direction in a direction in which the image is shifted along the Y-axis direction, thereby moving the blur correction lens 76 along the Y-axis direction.

[0204] As an example, the X-axis piezoelectric element 124 is disposed in the −X-axis direction with respect to the holding member 252. The X-axis piezoelectric element 124 is provided between the holding member 252 and the first support member 254 in the X-axis direction. Note that, instead of the X-axis piezoelectric element 124, for example, an actuator such as a DC motor that generates power similar to that of a piezoelectric element may be used.

[0205] The X-axis leaf spring 158 is disposed opposite the X-axis piezoelectric element 124. That is, the X-axis leaf spring 158 is disposed in the +X-axis direction with respect to the holding member 252. The X-axis leaf spring 158 is provided between the holding member 252 and the first support member 254 in the X-axis direction. The X-axis leaf spring 158 is, for example, a U-shaped or V-shaped leaf spring. Alternatively, the X-axis piezoelectric element 124 may be disposed in the +X-axis direction with respect to the holding member 252, and the X-axis leaf spring 158 may be disposed in the −X-axis direction with respect to the holding member 252. The X-axis leaf spring 158 may also be a leaf spring having a shape other than a U-shape or a V-shape. Alternatively, the X-axis leaf spring 158 may be replaced with an elastic member having elasticity, such as a coil spring, a torsion spring, rubber, or sponge.

[0206] The X-axis piezoelectric element 124 generates power in the X-axis direction. The X-axis piezoelectric element 124 is oriented so as to generate power in the +X-axis direction. The X-axis piezoelectric element driver 108 (see FIG. 6) switches between supplying and not supplying power to the X-axis piezoelectric element 124. When power is supplied to the X-axis piezoelectric element 124, the X-axis piezoelectric element 124 operates, and when power supply to the X-axis piezoelectric element 124 is stopped, the X-axis piezoelectric element 124 stops. When the X-axis piezoelectric element 124 operates, the X-axis piezoelectric element 124 applies power to the holding member 252 and the blur correction lens 76 in the +X-axis direction, and the holding member 252 and the blur correction lens 76 move in the +X-axis direction against the elastic force of the X-axis leaf spring 158. When power is applied by the X-axis piezoelectric element 124 in this way, the blur correction lens 76 moves, and the image is shifted in the +X-axis direction. When the X-axis piezoelectric element 124 stops operating, the elastic force of the X-axis leaf spring 158 in the -X-axis direction acts on the holding member 252 and the blur correction lens 76, causing the holding member 252 and the blur correction lens 76 to move in the -X-axis direction and return to their original positions.

[0207] As an example, the Y-axis piezoelectric element 126 is disposed in the -Y-axis direction with respect to the holding member 252. The Y-axis piezoelectric element 126 is provided between the holding member 252 and the first support member 254 in the Y-axis direction. Note that, instead of the Y-axis piezoelectric element 126, for example, an actuator such as a DC motor that generates power similar to that of a piezoelectric element may be used.

[0208] The Y-axis leaf spring 160 is disposed opposite the Y-axis piezoelectric element 126. That is, the Y-axis leaf spring 160 is disposed in the +Y-axis direction relative to the holding member 252. The Y-axis leaf spring 160 is disposed between the holding member 252 and the first support member 254 in the Y-axis direction. The Y-axis leaf spring 160 is, for example, a U-shaped or V-shaped leaf spring. Alternatively, the Y-axis piezoelectric element 126 may be disposed in the +Y-axis direction relative to the holding member 252, and the Y-axis leaf spring 160 may be disposed in the -Y-axis direction relative to the holding member 252. The Y-axis leaf spring 160 may also be a leaf spring having a shape other than a U-shape or a V-shape. Alternatively, the Y-axis leaf spring 160 may be replaced with an elastic member having elasticity, such as a coil spring, a torsion spring, rubber, or sponge.

[0209] The Y-axis piezoelectric element 126 generates power in the Y-axis direction. The Y-axis piezoelectric element 126 is oriented so as to generate power in the +Y-axis direction. The Y-axis piezoelectric element driver 110 (see FIG. 6) switches between supplying and not supplying power to the Y-axis piezoelectric element 126. When power is supplied to the Y-axis piezoelectric element 126, the Y-axis piezoelectric element 126 operates, and when power supply to the Y-axis piezoelectric element 126 is stopped, the Y-axis piezoelectric element 126 stops. When the Y-axis piezoelectric element 126 operates, the Y-axis piezoelectric element 126 applies power to the holding member 252 and the blur correction lens 76 in the +Y-axis direction, and the holding member 252 and the blur correction lens 76 move in the +Y-axis direction against the elastic force of the Y-axis leaf spring 160. When power is applied by the Y-axis piezoelectric element 126 in this way, the blur correction lens 76 moves, and the image shifts in the +Y-axis direction. When the Y-axis piezoelectric element 126 stops operating, the elastic force in the -Y-axis direction by the Y-axis leaf spring 160 acts on the holding member 252 and the blur correction lens 76, causing the holding member 252 and the blur correction lens 76 to move in the -Y-axis direction and return to their original positions.

[0210] In the second embodiment, the surveillance camera 10 has the same configuration and operates in the same manner as the first embodiment, except that a blur correction / shift drive mechanism 250 is used instead of the above-described blur correction / shift drive mechanism 150 (see FIGS. 7 and 8). For other operations of the surveillance camera 10, refer to the explanation of the above-described first embodiment, and explanations thereof will be omitted.

[0211] Next, the effects of the second embodiment will be described.

[0212] The blur correction / shift drive mechanism 250 includes a blur correction drive mechanism 274 that moves the blur correction lens 76 in a direction in which image blur is corrected, and a shift drive mechanism 288 that moves the blur correction lens 76 in a direction in which the image is shifted. Therefore, for example, the blur correction drive mechanism 274 that moves the blur correction lens 76 to correct image blur can perform image blur correction and image shifting with greater precision than when the blur correction lens 76 is moved to shift the image.

[0213] Furthermore, when the shift drive mechanism 288 moves the blur correction lens 76 in the direction in which the blur correction drive mechanism 274 moves the blur correction lens 76, the blur correction lens 76 moves by an amount obtained by adding the amount of movement of the blur correction lens 76 by the shift drive mechanism 288 to the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 274. Therefore, it is possible to shift the image to a position specified by the image shift command. Furthermore, when the shift drive mechanism 288 moves the blur correction lens 76 in the direction opposite to the direction in which the blur correction drive mechanism 274 moves the blur correction lens 76, the blur correction lens 76 moves by an amount obtained by subtracting the amount of movement of the blur correction lens 76 by the shift drive mechanism 288 from the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 274. Therefore, it is possible to shift the image to a position specified by the image shift command.

[0214] Furthermore, the X-axis piezoelectric element 124 applies power to the blur correction lens 76 along the X-axis direction, thereby moving the blur correction lens 76, and the Y-axis piezoelectric element 126 applies power to the blur correction lens 76 along the Y-axis direction, thereby moving the blur correction lens 76. Therefore, the X-axis piezoelectric element 124 and the Y-axis piezoelectric element 126 can move the blur correction lens 76 independently in the X-axis and Y-axis directions.

[0215] The blur correction / shift drive mechanism 250 also includes a holding member 252 that holds the blur correction lens 76, a first support member 254 that supports the holding member 252 movably along the XY coordinate plane, and a second support member 256 that supports the first support member 254 movably along the XY coordinate plane. The blur correction drive mechanism 274 is provided between the first support member 254 and the second support member 256, and the shift drive mechanism 288 is provided between the holding member 252 and the first support member 254. Therefore, the movement of the blur correction lens 76 to correct image blur and the movement of the blur correction lens 76 to shift the image can be performed independently.

[0216] Furthermore, the blur correction drive mechanism 274 has a voice coil motor, and the shift drive mechanism 288 has a piezoelectric element. Therefore, with a simple configuration, it is possible to move the blur correction lens 76 to correct image blur and to move the blur correction lens 76 to shift the image.

[0217] The shift drive mechanism 288 also has an X-axis leaf spring 158 disposed at a position facing the X-axis piezoelectric element 124. Therefore, when the X-axis piezoelectric element 124 is stopped, the vibration correction lens 76 is moved in the X-axis direction by the elastic force of the X-axis leaf spring 158. of Similarly, the shift drive mechanism 288 has a Y-axis leaf spring 160 disposed at a position facing the Y-axis piezoelectric element 126. Therefore, when the Y-axis piezoelectric element 126 is stopped, the vibration correction lens 76 is returned to its original position before being moved in the Y-axis direction by the elastic force of the Y-axis leaf spring 160. of can be returned to position.

[0218] The blur correction drive mechanism 274 also has an X-axis VCM 120 and a Y-axis VCM 122. The X-axis VCM 120 is provided between the first support member 254 and the second support member 256, and generates power in the X-axis direction. The Y-axis VCM 122 is provided between the first support member 254 and the second support member 256, and generates power in the Y-axis direction. Therefore, the X-axis VCM 120 and the Y-axis VCM 122 can move the blur correction lens 76 independently in the X-axis and Y-axis directions.

[0219] The shift drive mechanism 288 also has an X-axis piezoelectric element 124 and a Y-axis piezoelectric element 126. The X-axis piezoelectric element 124 is provided between the holding member 252 and the first support member 254, and generates power in the X-axis direction. The Y-axis piezoelectric element 126 is provided between the holding member 252 and the first support member 254, and generates power in the Y-axis direction. Therefore, the X-axis piezoelectric element 124 and the Y-axis piezoelectric element 126 can move the blur correction lens 76 in the X-axis and Y-axis directions independently.

[0220] In the second embodiment, the same configuration as in the first embodiment provides the same actions and effects as in the first embodiment.

[0221] [Third embodiment] Next, a third embodiment will be described. As an example, as shown in Figures 28 and 29, the third embodiment uses a blur correction / shift drive mechanism 350. The blur correction / shift drive mechanism 350 has the following configuration changes compared to the blur correction / shift drive mechanism 150 of the first embodiment (see Figures 7 and 8). Note that in the third embodiment, elements and members similar to those of the first embodiment are designated by the same reference numerals as in the first embodiment, and detailed descriptions thereof will be omitted.

[0222] The shake correction / shift drive mechanism 350 according to the third embodiment includes a holding member 352, a first support member 354, a second support member 356, an X-axis VCM 120, a Y-axis VCM 122, a piezoelectric element 358, and a leaf spring 360. The configurations of the X-axis VCM 120 and the Y-axis VCM 122 are the same as those in the first embodiment. The configuration of the piezoelectric element 358 is the same as that of the X-axis piezoelectric element 124 and the Y-axis piezoelectric element 126 (see FIGS. 7 and 8) in the first embodiment, and the configuration of the leaf spring 360 is the same as that of the X-axis leaf spring 158 and the Y-axis leaf spring 160 (see FIGS. 7 and 8) in the first embodiment. However, the arrangement of the X-axis VCM 120, the Y-axis VCM 122, the piezoelectric element 358, and the leaf spring 360 differs from that in the first embodiment. The piezoelectric element 358 is an example of a "third actuator" according to the technology of the present disclosure, and the leaf spring 360 is an example of an "elastic member" according to the technology of the present disclosure.

[0223] The holding member 352 has a main body 362 and a protrusion 364. The main body 362 is formed in an annular shape, and the protrusion 364 protrudes from the main body 362 in the radial direction of the main body 362. A blur correction lens 76 is provided inside the main body 362. The outer periphery of the blur correction lens 76 is fixed to the inner periphery of the main body 362. The blur correction lens 76 is held by the holding member 352 by fixing the outer periphery to the inner periphery of the main body 362.

[0224] The protrusion 364 is located in the +X-axis direction and the +Y-axis direction relative to the main body 362. The protrusion 364 is disposed between the first support member 354 and the second support member 356 in the Z-axis direction. The protrusion 364 is rotatably fixed to the first support member 354 by an axis member 365 extending along the optical axis OA. The holding member 352 is supported by the first support member 354 so as to be rotatable around the axis member 365. When the X-axis VCM 120, the Y-axis VCM 122, and the piezoelectric element 358 are not operating and no shake is occurring in the surveillance camera 10, the center of the shake correction lens 76 is located on the optical axis OA.

[0225] The first support member 354 is formed in a generally plate-like shape. The first support member 354 is disposed with its thickness oriented in the Z-axis direction. A hole 366 is formed in the first support member 354, penetrating it in the Z-axis direction. The hole 366 has a circular cross-section as viewed from the axial direction and is formed with a diameter equal to or larger than that of the main body 362. A piezoelectric element 358 and a leaf spring 360 are provided between the holding member 352 and the first support member 354. The holding member 352 is supported by the first support member 354 via the piezoelectric element 358 and the leaf spring 360 so as to be movable along the XY coordinate plane. When the X-axis VCM 120, the Y-axis VCM 122, and the piezoelectric element 358 are not operating and the surveillance camera 10 is not shaken, the center of the hole 366 is located on the optical axis OA.

[0226] The second support member 356 is fixed to the housing 70A of the lens device 70. The housing 70A of the lens device 70 is a member that supports the objective lens 72, zoom lens 74, diaphragm 78, filter unit 80, and master lens 82 (see FIG. 2) described above in addition to the blur correction lens 76 and the blur correction / shift drive mechanism 350, and the second support member 356 is fixed to the housing 70A of the lens device 70.

[0227] As an example, the second support member 356 is formed in a generally plate-like shape. The second support member 356 is disposed with its plate thickness direction in the Z-axis direction. The second support member 356 is disposed opposite the first support member 354 in the Z-axis direction. A hole 372 is formed in the second support member 356, penetrating it in the Z-axis direction. The cross section of the hole 372 when viewed from the axial direction is circular. The hole 372 is formed with a diameter equal to or larger than the diameter of the blur correction lens 76. The center of the hole 372 is located on the optical axis OA. A sliding member (not shown), such as a ball, is disposed between the first support member 354 and the second support member 356, thereby supporting the first support member 354 by the second support member 356 so that it can move along the XY coordinate plane.

[0228] The X-axis VCM 120 and the Y-axis VCM 122 form a blur correction drive mechanism 374. The blur correction drive mechanism 374 is an example of a "first drive mechanism" according to the technology of the present disclosure. The blur correction drive mechanism 374 is provided between the first support member 354 and the second support member 356. The blur correction drive mechanism 374 applies power to the blur correction lens 76 along the X-axis plane in a direction in which image blur is corrected, thereby moving the blur correction lens 76 along the X-axis plane. That is, the X-axis VCM 120 applies power to the blur correction lens 76 along the X-axis direction in a direction in which image blur in the X-axis direction is corrected, thereby moving the blur correction lens 76 along the X-axis direction, and the Y-axis VCM 122 applies power to the blur correction lens 76 along the Y-axis direction in a direction in which image blur in the Y-axis direction is corrected, thereby moving the blur correction lens 76 along the Y-axis direction.

[0229] As an example, the X-axis VCM 120 is disposed in the +X-axis direction relative to the blur correction lens 76. However, the X-axis VCM 120 may also be disposed in the -X-axis direction relative to the blur correction lens 76. The X-axis VCM 120 is provided between the first support member 354 and the second support member 356 in the Z-axis direction. As an example, the X-axis VCM 120 is a flat coil type voice coil motor, and has a coil 176 and a pair of magnets 178 and 180.

[0230] As an example, the coil 176 is fixed to the first support member 354, and the pair of magnets 178 and 180 are fixed to the second support member 356. Alternatively, the coil 176 may be fixed to the second support member 356, and the pair of magnets 178 and 180 may be fixed to the first support member 354. The coil 176 is arranged with its axial direction aligned in the Z-axis direction, and the pair of magnets 178 and 180 are arranged side by side in the X-axis direction. The north pole of the magnet 178 faces the coil 176, and the south pole of the magnet 180 faces the coil 176.

[0231] The X-axis VCM 120 generates power in the X-axis direction. The direction of the current flowing through the coil 176 is switched by the X-axis VCM driver 104 (see FIG. 6). Switching the direction of the current flowing through the coil 176 switches the direction of the force that the coil 176 receives from the pair of magnets 178 and 180. When the coil 176 receives a force in the +X-axis direction from the pair of magnets 178 and 180, power is applied to the first support member 354, the holding member 352, and the blur correction lens 76 in the +X-axis direction, and the first support member 354, the holding member 352, and the blur correction lens 76 move in the +X-axis direction. When coil 176 receives force in the -X-axis direction from the pair of magnets 178 and 180, power is applied to first support member 354, holding member 352, and blur correction lens 76 in the -X-axis direction, and first support member 354, holding member 352, and blur correction lens 76 move in the -X-axis direction. By applying power in this way from X-axis VCM 120, blur correction lens 76 moves in the X-axis direction, and image blur in the X-axis direction is corrected.

[0232] As an example, the Y-axis VCM 122 is disposed in the −Y-axis direction with respect to the blur correction lens 76. However, the Y-axis VCM 122 may also be disposed in the +Y-axis direction with respect to the blur correction lens 76. The Y-axis VCM 122 is provided between the first support member 354 and the second support member 356 in the Z-axis direction. As an example, the Y-axis VCM 122 is a flat coil type voice coil motor, and has a coil 182 and a pair of magnets 184 and 186.

[0233] As an example, the coil 182 is fixed to the first support member 354, and the pair of magnets 184 and 186 are fixed to the second support member 356. Alternatively, the coil 182 may be fixed to the second support member 356, and the pair of magnets 184 and 186 may be fixed to the first support member 354. The coil 182 is arranged with its axial direction aligned in the Z-axis direction, and the pair of magnets 184 and 186 are arranged side by side in the Y-axis direction. The north pole of the magnet 184 faces the coil 182, and the south pole of the magnet 186 faces the coil 182.

[0234] Y-axis VCM 122 generates power in the Y-axis direction. The direction of the current flowing through coil 182 is switched by Y-axis VCM driver 106 (see FIG. 6). Switching the direction of the current flowing through coil 182 switches the direction of the force that coil 182 receives from the pair of magnets 184 and 186. When coil 182 receives force in the +Y-axis direction from the pair of magnets 184 and 186, power is applied to first support member 354, holding member 352, and blur correction lens 76 in the +Y-axis direction, and first support member 354, holding member 352, and blur correction lens 76 move in the +Y-axis direction. When coil 182 receives force in the -Y-axis direction from the pair of magnets 184 and 186, power is applied to first support member 354, holding member 352, and blur correction lens 76 in the -Y-axis direction, and first support member 354, holding member 352, and blur correction lens 76 move in the -Y-axis direction. By applying power in this way from Y-axis VCM 122, blur correction lens 76 moves in the Y-axis direction, and image blur in the Y-axis direction is corrected.

[0235] As an example, the X-axis VCM 120 is a flat coil type voice coil motor in which the coil 176 and the pair of magnets 178 and 180 face each other in the axial direction of the coil 176, but the X-axis VCM 120 may be a square coil type voice coil motor in which the coil 176 is disposed between the pair of magnets 178 and 180 that face each other in the radial direction of the coil 176. Similarly, as an example, the Y-axis VCM 122 is a flat coil type voice coil motor in which the coil 182 and the pair of magnets 184 and 186 face each other in the axial direction of the coil 182, but the Y-axis VCM 122 may be a square coil type voice coil motor in which the coil 182 is disposed between the pair of magnets 184 and 186 that face each other in the radial direction of the coil 182.

[0236] The piezoelectric element 358 and the leaf spring 360 form a shift drive mechanism 388. The shift drive mechanism 388 is an example of a "second drive mechanism" according to the technology of the present disclosure. The shift drive mechanism 388 is provided between the holding member 352 and the first support member 354. The shift drive mechanism 388 applies power to the blur correction lens 76 along the XY coordinate plane in the direction in which the image is shifted, thereby moving the blur correction lens 76 along the XY coordinate plane.

[0237] As an example, the piezoelectric element 358 is disposed in the +X-axis direction and the −Y-axis direction relative to the main body portion 362. The piezoelectric element 358 is provided between the holding member 352 and the first support member 354. Instead of the piezoelectric element 358, for example, an actuator such as a DC motor that generates power similar to that of a piezoelectric element may be used.

[0238] The leaf spring 360 is disposed opposite the piezoelectric element 358. That is, the leaf spring 360 is disposed in the −X-axis direction and the +Y-axis direction with respect to the main body 362. The leaf spring 360 is provided between the holding member 352 and the first support member 354. The leaf spring 360 is, for example, a U-shaped or V-shaped leaf spring. Note that the protrusion 364 may be disposed in the +X-axis direction and the −Y-axis direction of the main body 362, the piezoelectric element 358 may be disposed in the −X-axis direction and the −Y-axis direction of the main body 362, and the leaf spring 360 may be disposed in the +X-axis direction and the +Y-axis direction of the main body 362. Alternatively, the protrusion 364 may be disposed in the −X-axis direction and the −Y-axis direction of the main body 362, the piezoelectric element 358 may be disposed in the −X-axis direction and the +Y-axis direction of the main body 362, and the leaf spring 360 may be disposed in the +X-axis direction and the +Y-axis direction of the main body 362. Alternatively, the protrusion 364 may be located in the -X-axis direction and the +Y-axis direction of the main body 362, the piezoelectric element 358 may be disposed in the +X-axis direction and the +Y-axis direction of the main body 362, and the leaf spring 360 may be disposed in the +X-axis direction and the -Y-axis direction of the main body 362. The leaf spring 360 may be a leaf spring having a shape other than a U-shape or a V-shape. Alternatively, instead of the leaf spring 360, an elastic member having elasticity, such as a coil spring, a torsion spring, rubber, or sponge, may be used.

[0239] The piezoelectric element 358 generates power in a composite direction of the X-axis and Y-axis directions. The piezoelectric element 358 is oriented so as to generate power in a composite direction of the −X-axis and +Y-axis directions. A piezoelectric element driver (not shown) switches between supplying power to the piezoelectric element 358. When power is supplied to the piezoelectric element 358, the piezoelectric element 358 operates, and when power supply to the piezoelectric element 358 is stopped, the piezoelectric element 358 stops. When the piezoelectric element 358 operates, power is applied by the piezoelectric element 358 to the holding member 352 and the blur correction lens 76 in the composite direction of the −X-axis and +Y-axis directions, and the holding member 352 and the blur correction lens 76 rotate around the shaft member 365 in the composite direction of the −X-axis and +Y-axis directions. At this time, the holding member 352 and the blur correction lens 76 rotate against the elastic force of the leaf spring 360. In this way, power is applied by piezoelectric element 358, which moves blur correction lens 76, thereby shifting the image in the −X-axis direction and the +Y-axis direction. When piezoelectric element 358 is stopped from its activated state, the elastic force of leaf spring 360 in the combined direction of the +X-axis direction and the −Y-axis direction acts on holding member 352 and blur correction lens 76, and holding member 352 and blur correction lens 76 rotate around shaft member 365 in the combined direction of the +X-axis direction and the −Y-axis direction and return to their original positions.

[0240] In the third embodiment, the surveillance camera 10 has the same configuration as the first embodiment and operates in the same manner as the first embodiment, except that a blur correction / shift drive mechanism 350 is used instead of the blur correction / shift drive mechanism 150 (see FIGS. 7 and 8). However, in the third embodiment, control for switching between image shift and non-shift is repeatedly executed, with two frame periods as one set. For other operations of the surveillance camera 10, refer to the explanation of the first embodiment above, and explanations thereof will be omitted.

[0241] Next, the effects of the third embodiment will be described.

[0242] The blur correction / shift drive mechanism 350 includes a blur correction drive mechanism 374 that moves the blur correction lens 76 in a direction in which image blur is corrected, and a shift drive mechanism 388 that moves the blur correction lens 76 in a direction in which the image is shifted. Therefore, for example, the blur correction drive mechanism 374 that moves the blur correction lens 76 to correct image blur can perform image blur correction and image shifting with greater precision than when the blur correction lens 76 is moved to shift the image.

[0243] Furthermore, when the shift drive mechanism 388 moves the blur correction lens 76 in the direction in which the blur correction drive mechanism 374 moves the blur correction lens 76, the blur correction lens 76 moves by an amount obtained by adding the amount of movement of the blur correction lens 76 by the shift drive mechanism 388 to the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 374. Therefore, it is possible to shift the image to a position specified by the image shift command. Furthermore, when the shift drive mechanism 388 moves the blur correction lens 76 in the direction opposite to the direction in which the blur correction drive mechanism 374 moves the blur correction lens 76, the blur correction lens 76 moves by an amount obtained by subtracting the amount of movement of the blur correction lens 76 by the shift drive mechanism 388 from the amount of movement of the blur correction lens 76 by the blur correction drive mechanism 374. Therefore, it is possible to shift the image to a position specified by the image shift command.

[0244] The blur correction / shift drive mechanism 350 also includes a holding member 352 that holds the blur correction lens 76, a first support member 354 that supports the holding member 352 movably along the XY coordinate plane, and a second support member 356 that supports the first support member 354 movably along the XY coordinate plane. The blur correction drive mechanism 374 is provided between the first support member 354 and the second support member 356, and the shift drive mechanism 388 is provided between the holding member 352 and the first support member 354. Therefore, the movement of the blur correction lens 76 to correct image blur and the movement of the blur correction lens 76 to shift the image can be performed independently.

[0245] Furthermore, the holding member 352 is supported by the first support member 354 so as to be rotatable around an axis member 365 extending along the optical axis OA. This makes it possible to shift the image along the XY coordinate plane orthogonal to the optical axis OA with a simple configuration.

[0246] Furthermore, the blur correction drive mechanism 374 has a voice coil motor, and the shift drive mechanism 388 has a piezoelectric element. Therefore, with a simple configuration, it is possible to move the blur correction lens 76 to correct image blur and to move the blur correction lens 76 to shift the image.

[0247] Furthermore, the shift drive mechanism 388 has a leaf spring 360 disposed at a position facing the piezoelectric element 358. Therefore, when the piezoelectric element 358 is stopped, the elastic force of the leaf spring 360 moves the blur correction lens 76 in the X-axis direction. of can be returned to position.

[0248] Furthermore, the blur correction drive mechanism 374 has an X-axis VCM 120 and a Y-axis VCM 122. The X-axis VCM 120 is provided between the first support member 354 and the second support member 356, and generates power in the X-axis direction. The Y-axis VCM 122 is provided between the first support member 354 and the second support member 356, and generates power in the Y-axis direction. Therefore, the X-axis VCM 120 and the Y-axis VCM 122 can move the blur correction lens 76 independently in the X-axis and Y-axis directions.

[0249] The shift drive mechanism 388 also has a piezoelectric element 358. The piezoelectric element 358 is provided between the holding member 352 and the first support member 354, and generates power in a composite direction of the X-axis and Y-axis directions. Therefore, the piezoelectric element 358 can move the blur correction lens 76 in the composite direction of the X-axis and Y-axis directions.

[0250] In the third embodiment, the same configuration as in the first embodiment provides the same actions and effects as in the first embodiment.

[0251] Next, a modification common to the above-described embodiments (that is, the first, second, and third embodiments) will be described.

[0252] In the above embodiment, the lens device 70 is provided on the surveillance camera body 20 by attaching the lens device 70 to the surveillance camera body 20 having the image sensor 24, but as an example, as shown in Figure 30, the lens device 70 may be provided on the surveillance camera body 20 by mounting the lens device 70 on the surveillance camera body 20 having the image sensor 24.

[0253] Furthermore, in the above embodiment, the lens device 70 is provided with a controller 90 separate from the controller 40 of the surveillance camera body 20, but the lens device 70 does not have to be provided with a controller 90. Furthermore, the functions of the controller 90 of the lens device 70 may be integrated into the controller 40 of the surveillance camera body 20, and the lens device 70 may be controlled by the controller 40 of the surveillance camera body 20. In this case, the controller 90 is an example of a "computer applied to an imaging device."

[0254] Furthermore, in the above embodiment, an example in which the image capture process is executed by the controller 40 of the surveillance camera 10 has been described, but the technology of the present disclosure is not limited to this. For example, the image capture process may be executed by a computer in an external device communicably connected to the surveillance camera 10 via a network such as a LAN or WAN. Furthermore, the image capture process may be distributed between the above-mentioned external device and the surveillance camera 10, or may be executed by multiple devices including the above-mentioned external device and the surveillance camera 10. Place The imaging process may be executed in a distributed manner.

[0255] Furthermore, in the above embodiment, the surveillance camera 10 has been described as an example of an imaging device, but the technology of the present disclosure is not limited thereto, and the technology described in the above embodiment can be applied to various imaging devices. Examples of imaging devices include digital cameras with interchangeable lenses and no reflex mirror, digital cameras with fixed lenses, digital cameras with reflex mirrors, and digital cameras built into various electronic devices such as smart devices, wearable devices, cell observation devices, ophthalmic observation devices, and surgical microscopes. Furthermore, the technology described in the above embodiment may be applied to imaging devices equipped with image sensors sensitive to light having wavelength bands other than the near-infrared wavelength band.

[0256] Furthermore, in the above embodiment, an example was described in which the blur correction and shift processing program 100 is stored in the NVM 94, but the blur correction and shift processing program 100 may be stored in a portable storage medium such as an SSD or a USB memory, and the blur correction and shift processing program 100 may be stored in a non-transitory storage medium. The blur correction and shift processing program 100 stored in a non-transitory storage medium is installed in, for example, the lens device 70 and used.

[0257] Furthermore, in the above embodiment, an example is shown in which the controller 40 is built into the surveillance camera 10, but the technology of the present disclosure is not limited to this, and for example, the controller 40 may be provided outside the surveillance camera 10.

[0258] In the above embodiment, the CPU 42 of the surveillance camera body 20 is a single CPU, but it may be multiple CPUs. Also, a GPU may be used instead of the CPU 42. Similarly, the CPU 92 of the lens device 70 is a single CPU, but it may be multiple CPUs. Also, a GPU may be used instead of the CPU 92.

[0259] Furthermore, in the above embodiment, the surveillance camera body 20 includes the controller 40, but the technology of the present disclosure is not limited to this, and a device including an ASIC, FPGA, and / or PLD may be applied instead of the controller 40. Furthermore, instead of the controller 40, a combination of a hardware configuration and a software configuration may be used.

[0260] Furthermore, in the above embodiment, the lens device 70 includes the controller 90, but the technology of the present disclosure is not limited to this, and a device including an ASIC, an FPGA, and / or a PLD may be applied instead of the controller 90. Furthermore, instead of the controller 90, a combination of a hardware configuration and a software configuration may be used.

[0261] The hardware resources for executing the shake correction and shift processing described in the above embodiments can be various processors, as listed below. Examples of processors include a CPU, which is a general-purpose processor that functions as a hardware resource for executing shake correction and shift processing by executing software, i.e., a program. Examples of processors include dedicated electrical circuits, such as FPGAs, PLDs, or ASICs, which are processors with circuit configurations designed specifically for executing specific processing. Each processor has built-in or connected memory, and each processor executes the shake correction and shift processing by using the memory.

[0262] The hardware resource that executes the shake correction and shift processing may be configured with one of these various processors, or may be configured with a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs, or a combination of a CPU and an FPGA). Also, the hardware resource that executes the shake correction and shift processing may be a single processor.

[0263] As an example of configuring a system using a single processor, first, one processor is configured by combining one or more CPUs and software, and this processor functions as a hardware resource that executes the shake correction and shift processing. Second, there is a form in which a processor is used that realizes the functions of the entire system, including multiple hardware resources that execute the shake correction and shift processing, on a single IC chip, as typified by SoCs. In this way, the shake correction and shift processing is realized using one or more of the various processors described above as hardware resources.

[0264] Furthermore, the hardware structure of these various processors can be, more specifically, an electric circuit that combines circuit elements such as semiconductor elements. The above-described shake correction and shift processing is merely an example. Therefore, it goes without saying that unnecessary steps may be deleted, new steps may be added, or the processing order may be changed, without departing from the spirit of the invention.

[0265] The above-described description and illustrations are a detailed explanation of the parts related to the technology of the present disclosure and are merely an example of the technology of the present disclosure. For example, the above description of the configuration, functions, actions, and effects is an explanation of an example of the configuration, functions, actions, and effects of the parts related to the technology of the present disclosure. Therefore, it goes without saying that unnecessary parts may be deleted, new elements may be added, or replacements may be made to the above-described description and illustrations within the scope of the gist of the technology of the present disclosure. Furthermore, to avoid confusion and facilitate understanding of the parts related to the technology of the present disclosure, the above-described description and illustrations omit explanations of common technical knowledge that do not require particular explanation to enable the implementation of the technology of the present disclosure.

[0266] In this specification, "A and / or B" is synonymous with "at least one of A and B." In other words, "A and / or B" means that it may be only A, only B, or a combination of A and B. Furthermore, in this specification, the same concept as "A and / or B" is also applied when three or more things are expressed connected by "and / or."

[0267] All publications, patent applications, and technical standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or technical standard was specifically and individually indicated to be incorporated by reference.

Claims

1. A lens device provided in an imaging device body having an image sensor, a lens including a blur correction lens that corrects blur of an image obtained by focusing light on the image sensor, and that focuses the incident light on the image sensor; a first drive mechanism that applies power to the blur correction lens along a coordinate plane that intersects with an optical axis of the lens, thereby moving the blur correction lens in a direction in which blur of the image is corrected; a second drive mechanism that applies a force to the blur correction lens along the coordinate plane in a direction in which the image is shifted, thereby moving the blur correction lens; Equipped with the second drive mechanism is a drive mechanism of a different type from the first drive mechanism, a second movement amount of the blur correction lens based on the second drive mechanism is smaller than a first movement amount of the blur correction lens based on the first drive mechanism; Lens device.

2. a processor; a memory connected to or embedded in the processor; The processor: controlling the first drive mechanism to move the image blur correction lens in a direction in which the image blur is corrected; The second drive mechanism is controlled to move the blur correction lens in a direction in which the image is shifted. The lens device according to claim 1 .

3. the second drive mechanism moves the blur correction lens in a direction in which the first drive mechanism moves the blur correction lens; when the second drive mechanism moves the blur correction lens in a direction in which the first drive mechanism moves the blur correction lens, the blur correction lens moves by an amount obtained by adding an amount of movement of the blur correction lens by the second drive mechanism to an amount of movement of the blur correction lens by the first drive mechanism, When the second drive mechanism moves the blur correction lens in a direction opposite to the direction in which the first drive mechanism moves the blur correction lens, the blur correction lens moves by an amount of movement obtained by subtracting the amount of movement of the blur correction lens by the second drive mechanism from the amount of movement of the blur correction lens by the first drive mechanism. The lens device according to claim 2 .

4. the control of the first drive mechanism is feedback control based on a blur amount of an imaging device including the lens device and the imaging device main body, The control of the second drive mechanism is a sequential control based on a predetermined shift order.

4. The lens device according to claim 2 or 3.

5. The processor controls the second drive mechanism to move the blur correction lens in a direction in which the image is shifted, in response to image capture by the image sensor on a frame-by-frame basis. The lens device according to any one of claims 2 to 4.

6. The processor controls the second drive mechanism to move the blur correction lens to a position where the image shifts by a pitch equal to or greater than the pixel pitch of the image sensor or a pitch less than the pixel pitch of the image sensor. The lens device according to any one of claims 2 to 5.

7. the coordinate plane is defined by a first direction and a second direction intersecting the first direction, the second drive mechanism includes a third actuator and a fourth actuator; the third actuator applies a force to the blur correction lens along the first direction to move the blur correction lens; the fourth actuator applies a force to the blur correction lens along the second direction to move the blur correction lens; The processor controls the second drive mechanism to selectively switch between a combination of the presence or absence of power from the third actuator and a combination of the presence or absence of power from the fourth actuator. The lens device according to any one of claims 2 to 6.

8. the coordinate plane is defined by a first direction and a second direction intersecting the first direction, the second drive mechanism includes a third actuator and a fourth actuator; the third actuator applies a force to the blur correction lens along the first direction to move the blur correction lens; The fourth actuator applies a force to the blur correction lens along the second direction, thereby moving the blur correction lens. The lens device according to any one of claims 1 to 7.

9. a holding member that holds the blur correction lens; a first support member that supports the holding member so that the holding member is movable along the coordinate plane; a second support member that supports the first support member movably along the coordinate plane; Equipped with the first drive mechanism is provided between the holding member and the first support member, The second drive mechanism is provided between the first support member and the second support member. The lens device according to any one of claims 1 to 8.

10. a holding member that holds the blur correction lens; a first support member that supports the holding member so that the holding member is movable along the coordinate plane; a second support member that supports the first support member movably along the coordinate plane; Equipped with the first drive mechanism is provided between the first support member and the second support member, The second drive mechanism is provided between the holding member and the first support member. The lens device according to any one of claims 1 to 9.

11. The holding member is supported by the first support member so as to be rotatable about a shaft member extending along the optical axis. The lens device according to claim 10.

12. the first drive mechanism includes a voice coil motor; The second driving mechanism has a piezoelectric element. The lens device according to any one of claims 1 to 11.

13. The second driving mechanism has an elastic member disposed at a position facing the piezoelectric element. The lens device according to claim 12.

14. the coordinate plane is defined by a first direction and a second direction intersecting the first direction, The first drive mechanism a first actuator provided between the holding member and the first support member, the first actuator generating power in the first direction; a second actuator provided between the holding member and the first support member, the second actuator generating power in the second direction; and The second drive mechanism is a third actuator provided between the first support member and the second support member, the third actuator generating power in the first direction; a fourth actuator provided between the first support member and the second support member and configured to generate power in the second direction; have The lens device according to claim 9 .

15. the coordinate plane is defined by a first direction and a second direction intersecting the first direction, The first drive mechanism a first actuator provided between the first support member and the second support member, the first actuator generating power in the first direction; a second actuator provided between the first support member and the second support member and configured to generate power in the second direction; and The second drive mechanism is a third actuator provided between the holding member and the first support member, the third actuator generating power in the first direction; a fourth actuator provided between the holding member and the first support member and configured to generate power in the second direction; have The lens device according to claim 10.

16. the coordinate plane is defined by a first direction and a second direction intersecting the first direction, The first drive mechanism a first actuator provided between the first support member and the second support member, the first actuator generating power in the first direction; a second actuator provided between the first support member and the second support member and configured to generate power in the second direction; and The second drive mechanism includes a third actuator that is provided between the holding member and the first support member and generates power in a combined direction of the first direction and the second direction. The lens device according to claim 10.

17. an optical filter disposed closer to the subject than the image sensor and transmitting near-infrared light included in the light; The lens device according to any one of claims 1 to 16.

18. a processor; a memory connected to or embedded in said processor; An image sensor; a lens including a blur correction lens that corrects blur of an image obtained by focusing light on the image sensor, and that focuses the incident light on the image sensor; a first drive mechanism that applies power to the blur correction lens along a coordinate plane that intersects with an optical axis of the lens, thereby moving the blur correction lens in a direction in which blur of the image is corrected; a second drive mechanism that applies a force to the blur correction lens along the coordinate plane in a direction in which the image is shifted, thereby moving the blur correction lens; Equipped with the second drive mechanism is a drive mechanism of a different type from the first drive mechanism, a second movement amount of the blur correction lens based on the second drive mechanism is smaller than a first movement amount of the blur correction lens based on the first drive mechanism; Imaging device.

19. The processor: controlling the second drive mechanism to move the blur correction lens to a position where the image is shifted at a pitch equal to or greater than the pixel pitch of the image sensor or at a pitch less than the pixel pitch of the image sensor; causing the image sensor to capture an image in accordance with the shift of the image; The plurality of frames of images obtained by the imaging are synthesized. The imaging device according to claim 18.

20. 1. A method of operating a lens device, comprising: The lens device a lens including a blur correction lens that corrects blur of an image obtained by focusing light on an image sensor, and that focuses the incident light on the image sensor; a first drive mechanism that applies power to the blur correction lens along a coordinate plane that intersects with an optical axis of the lens, thereby moving the blur correction lens in a direction in which blur of the image is corrected; a second drive mechanism that applies a force to the blur correction lens along the coordinate plane in a direction in which the image is shifted, thereby moving the blur correction lens; Equipped with the second drive mechanism is a drive mechanism of a different type from the first drive mechanism, a second movement amount of the blur correction lens based on the second drive mechanism is smaller than a first movement amount of the blur correction lens based on the first drive mechanism, The operating method includes: controlling the first drive mechanism to move the blur correction lens in a direction in which blur of the image is corrected; and controlling the second drive mechanism to move the blur correction lens in a direction in which the image is shifted; A method of operating a lens device comprising:

21. 1. A method of operating an imaging device, comprising: The imaging device is An image sensor; A blur correction lens that corrects blur in an image obtained by focusing light on the image sensor. a lens that forms an image of the incident light on the image sensor; a first drive mechanism that applies power to the blur correction lens along a coordinate plane that intersects with an optical axis of the lens, thereby moving the blur correction lens in a direction in which blur of the image is corrected; a second drive mechanism that applies a force to the blur correction lens along the coordinate plane in a direction in which the image is shifted, thereby moving the blur correction lens; Equipped with the second drive mechanism is a drive mechanism of a different type from the first drive mechanism, a second movement amount of the blur correction lens based on the second drive mechanism is smaller than a first movement amount of the blur correction lens based on the first drive mechanism, The operating method includes: controlling the first drive mechanism to move the blur correction lens in a direction in which blur of the image is corrected; and controlling the second drive mechanism to move the blur correction lens in a direction in which the image is shifted; A method of operating an imaging device comprising:

22. A program for causing a computer to execute processing, the program being applied to a lens device, The lens device a lens including a blur correction lens that corrects blur of an image obtained by focusing light on an image sensor, and that focuses the incident light on the image sensor; a first drive mechanism that applies power to the blur correction lens along a coordinate plane that intersects with an optical axis of the lens, thereby moving the blur correction lens in a direction in which blur of the image is corrected; a second drive mechanism that applies a force to the blur correction lens along the coordinate plane in a direction in which the image is shifted, thereby moving the blur correction lens; Equipped with the second drive mechanism is a drive mechanism of a different type from the first drive mechanism, a second movement amount of the blur correction lens based on the second drive mechanism is smaller than a first movement amount of the blur correction lens based on the first drive mechanism, The process comprises: controlling the first drive mechanism to move the blur correction lens in a direction in which blur of the image is corrected; and controlling the second drive mechanism to move the blur correction lens in a direction in which the image is shifted; A program for executing a process including:

23. A program for causing a computer to execute processing, the program being applied to an imaging device, The imaging device is An image sensor; a lens including a blur correction lens that corrects blur of an image obtained by focusing light on the image sensor, and that focuses the incident light on the image sensor; a first drive mechanism that applies power to the blur correction lens along a coordinate plane that intersects with an optical axis of the lens, thereby moving the blur correction lens in a direction in which blur of the image is corrected; a second drive mechanism that applies a force to the blur correction lens along the coordinate plane in a direction in which the image is shifted, thereby moving the blur correction lens; Equipped with the second drive mechanism is a drive mechanism of a different type from the first drive mechanism, a second movement amount of the blur correction lens based on the second drive mechanism is smaller than a first movement amount of the blur correction lens based on the first drive mechanism, The process comprises: controlling the first drive mechanism to move the blur correction lens in a direction in which blur of the image is corrected; and controlling the second drive mechanism to move the blur correction lens in a direction in which the image is shifted; A program for executing a process including:

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