JP2022043208A - Adjustment method, imaging device, and control program for imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens unit, etc. which stably maintain the state of an optical axis of a correction lens being accurately aligned with optical axes of other lenses during imaging, even with a simple structure.

SOLUTION: Provided is an adjustment method for a lens unit that includes an image-forming optical system for forming a subject image on a light receiving surface of an imaging element, a correction optical system having a correction lens and a movement frame that, while holding the correction lens, moves in a planar direction orthogonal to an optical axis of the correction lens, and a state switching drive unit for rotating three arm members arranged at prescribed intervals on an outside surface side of the movement frame so as to fix a movement range of the movement frame. In the lens unit, the method rotates the three arm members so that facing surfaces of respective arm members approach the outside surface of the movement frame from the state of being separated from the outside surface of the movement frame, and causes the amount of rotation by which the arm members are rotated to be stored in memory as the amount of rotation in a half-locked state, when the optical axis of the image-forming optical system is aligned with the optical axis of the correction optical system while at least one of the arm members is in contact with the outside surface side of the movement frame.

SELECTED DRAWING: Figure 5

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to an adjustment method of a lens unit, an image pickup device, and a control program of the image pickup device.

An imaging device including an optical image stabilization unit that suppresses image shake due to camera shake during imaging is known. An image pickup device provided with a fixing means for fixing the correction lens when the shake correction unit is not operated is also known (see, for example, Patent Document 1).

JP-A-2002-318400

The user of the image pickup apparatus may not want to operate the shake correction unit even during image pickup. In such an image pickup mode in which shake correction is off, it is desirable that the optical axis of the correction lens be aligned with the optical axis of another lens constituting the imaging optical system. In order to match both optical axes, generally, the correction lens is fixed by a mechanical mechanism, or feedback control is performed to keep the correction lens in a predetermined position. However, according to the former method, a complicated mechanical mechanism is required to accurately match both optical axes. If the misalignment of both optical axes is allowed, the image quality will deteriorate, such as the position of the center of the image changing during zooming. According to the latter method, the correction lens moves even with a slight impact, which also causes deterioration of image quality.

The present invention has been made to solve such a problem, and although it has a simple configuration, it is stable in a state where the optical axis of the correction lens is accurately aligned with the optical axis of another lens during imaging. It provides a lens unit and the like that can be maintained in a targeted manner.

The lens unit according to the first aspect of the present invention includes a correction lens, a moving frame that holds the correction lens and moves in a plane direction orthogonal to the optical axis of the correction lens, and a first actuator that moves the moving frame. , Movable restriction that can have a first state of fixing the moving frame so that it cannot be moved, a second state of not hindering the movement of the moving frame, and a third state between the first state and the second state. When a mechanism, a second actuator for switching the state of the limiting mechanism, and a control unit for controlling the first actuator and the second actuator are provided, and the control unit drives the second actuator to bring the limiting mechanism into the third state. In addition, the first actuator is controlled so that the moving frame is kept pressed against the predetermined contact point of the limiting mechanism.

Further, in the image pickup apparatus according to the second aspect of the present invention, the image pickup element, the above-mentioned lens unit, and the correction lens are moved in the second state of the limiting mechanism to reduce image shake and perform image pickup by the image pickup element. It is provided with a mode switching unit that switches between a vibration mode and a non-vibration mode in which the movement of the correction lens is stopped in the third state of the limiting mechanism to perform imaging by the image sensor.

Further, the control program of the image pickup apparatus according to the third aspect of the present invention sets a movable limiting mechanism of the correction lens when a non-vibration mode in which the movement of the correction lens is stopped to perform imaging is selected. A state switching step to switch to a predetermined third state between the first state of fixing the moving frame so as to be immovable and the second state of not hindering the movement of the moving frame, and the moving frame are restricted. Imaging control that performs imaging control while the moving frame is pressed against the contact point by the static control step and the static control step that control the mechanism so that it is pressed against the predetermined contact point. Have the computer perform the steps and.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a lens unit or the like that can stably maintain a state in which the optical axis of a correction lens is accurately aligned with the optical axis of another lens during imaging, even though it has a simple configuration. ..

It is a block diagram which shows the structure of the image pickup apparatus which concerns on this embodiment. It is a schematic diagram which shows the unlocked state of a moving frame. It is a schematic diagram explaining the state switching of a limiting mechanism. It is a schematic diagram which shows the locked state of a moving frame. It is a schematic diagram which shows the half-locked state of a moving frame. It is a schematic diagram explaining the adjustment of a semi-locked state. It is a flow chart which shows the processing flow of an image pickup apparatus.

Hereinafter, the present invention will be described through embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. Moreover, not all of the configurations described in the embodiments are indispensable as means for solving the problem.

FIG. 1 is a block diagram showing a configuration of an image pickup apparatus 100 according to the present embodiment. The image pickup device 100 is, for example, a handy type video camera. The image pickup apparatus 100 according to the present embodiment includes a lens unit including an imaging optical system 110, a correction optical system 120, a mechanism for operating these, and a control unit, but the lens unit is relative to the main body unit including the image pickup unit. May be a detachable image pickup device. Further, in the following description, although the description is made on the premise of capturing a moving image, an imaging device whose main function is a still image imaging function may be used.

The imaging optical system 110 includes a zoom lens 111 and a focus lens 112. The correction optical system 120 includes a correction lens 121. The correction lens 121 is held in the moving frame 160. The moving frame 160 can move in a plane direction orthogonal to the optical axis of the correction lens 121. The limiting mechanism 170 is a mechanical mechanism arranged so as to surround the periphery of the moving frame 160 and restricts the movement of the moving frame 160. The correction lens 121, the moving frame 160, and the limiting mechanism 170 constitute an image stabilization unit.

The subject image passes through the imaging optical system 110 and the correction optical system 120 and is imaged on the imaging surface of the image pickup device 130. In the figure, the zoom lens 111, the focus lens 112, and the correction lens 121 are shown in this order, but the arrangement of the lens elements is not limited to this order. Further, one lens may be configured to have a plurality of functions.

The image pickup device 130 is an element that photoelectrically converts an optical image that is a subject image, and for example, a CMOS sensor is used. The subject signal photoelectrically converted by the image pickup device 130 is converted into a digital signal via the analog front end (AFE) 132 and sent to the bus line 131. The memory 133 includes a work memory which is a volatile memory such as SRAM and a system memory which is a non-volatile recording medium such as SSD. The work memory delivers the subject signal received from the AFE 132 to the image processing unit 134 in frame units, or provides a temporary storage area in the middle of image processing by the image processing unit 134. The system memory holds constants, variables, set values, control programs, and the like necessary for the operation of the image pickup apparatus 100.

The image processing unit 134 converts the image data into an image file according to a specific image format according to the set imaging mode and the instruction from the user. For example, when an MPEG file is generated as a moving image, a frame image as a continuous still image is subjected to intra-frame coding and inter-frame coding to perform compression processing. Further, the image processing unit 134 independently generates a video signal to be displayed on a monitor 136, which is a liquid crystal display, in parallel with conversion to an image file or without conversion to an image file. The display processing unit 135 converts the received video signal into a display signal for display on the monitor 136.

The moving image file processed by the image processing unit 134 is recorded on the recording medium 201 via the output processing unit 137 and the recording medium IF 138. The recording medium 201 is a non-volatile memory configured by a flash memory or the like and which can be attached to and detached from the image pickup apparatus 100. Further, the output processing unit 137 can also transmit a moving image file to an external device via the communication IF 139. The communication IF 139 is, for example, a wireless LAN unit for connecting to the Internet.

The image pickup apparatus 100 includes a plurality of operation members 140 that receive operations from the user. The control unit 150 detects that these operation members 140 have been operated, and executes an operation according to the operation. The control unit 150 is, for example, a CPU, and directly or indirectly controls each element constituting the image pickup apparatus 100. The control by the control unit 150 is realized by a control program or the like read from the memory 133.

The moving frame drive unit 151 and the state switching drive unit 152 constitute an image stabilization unit. The moving frame drive unit 151 includes a voice coil motor as a first actuator for moving the moving frame 160. In addition to the elements shown in the figure, the image stabilization unit includes a position detection sensor that detects the position of the moving frame 160 and a shake detection sensor that detects blurring applied to the image pickup apparatus 100. The control unit 150 transmits a drive signal for moving the movement frame 160 to the target position so as to cancel the blur detected by the vibration detection sensor when the vibration isolation mode described later is on to the movement frame drive unit 151. do. The moving frame driving unit 151 moves the moving frame 160 according to the driving signal, so that the subject image maintains a stable image formation state on the light receiving surface of the image pickup device 130.

The state switching drive unit 152 includes a stepping motor as a second actuator for switching the state of the limiting mechanism 170. The limiting mechanism 170 is a movable mechanical mechanism capable of taking at least three states as described later. The control unit 150 transmits a drive signal for switching the state of the limiting mechanism 170 to the state switching drive unit 152. When the state switching drive unit 152 switches the state of the limiting mechanism 170 according to the drive signal, the limiting mechanism 170 stably maintains the switched state.

The focus drive unit 153 includes a motor for moving the focus lens 112 in the optical axis direction. The focus drive unit 153 moves the focus lens 112 so that the subject image in a specific focus area is focused on the light receiving surface of the image pickup device 130 based on the contrast information of the image signals continuously acquired. The zoom drive unit 154 includes a motor for moving the zoom lens 111 in the optical axis direction. The zoom drive unit 154 moves the zoom lens 111 so as to change the angle of view of the subject image according to the user's instruction.

Next, three states that the limiting mechanism 170 can take will be described. FIG. 2 is a schematic view showing an unlocked state in which the limiting mechanism 170 does not hinder the movement of the moving frame 160, and shows a state in which the correction lens 121 is observed from the optical axis direction. Here, the moving frame 160 that holds the correction lens 121 and the three arm members (first arm 171a, second arm 171b, third arm 171c) that determine the moving range of the moving frame 160 among the limiting mechanisms 170 are outlined. Is shown.

The moving frame 160 has a cylindrical shape, and a correction lens 121 is fitted on the inner surface thereof. The moving frame 160 is supported by being suspended from, for example, a coil spring (not shown) so that it can move in a plane orthogonal to the optical axis. The moving frame 160 includes a first coil 161a and a second coil 161b arranged at orthogonal biaxial directions at the edge portion. The first coil 161a and the second coil 161b are a part of a voice coil motor for moving the moving frame 160, and face the first magnet and the second magnet provided on the base member, respectively.

The first arm 171a, the second arm 171b, and the third arm 171c are arranged on the outer surface side of the moving frame 160 at intervals of 120 degrees. Of each arm, the facing surface facing the outer surface of the moving frame 160 has a curved surface that imitates the outer surface.

The first arm 171a has a first rotation pin 172a and a first cam pin 173a, which are erected parallel to the optical axis direction, respectively. The tip of the first rotating pin 172a is rotatably supported by a base member (not shown). As a result, the first arm 171a can rotate with the first rotation pin 172a as the rotation axis. The first cam pin 173a will be described later. The second arm 171b also has a second rotation pin 172b and a second cam pin 173b, and the third arm 171c also has a third rotation pin 172c and a third cam pin 173c.

The unlocked state shown in FIG. 2 is a state in which the facing surfaces of the respective arms are sufficiently separated from the outer surface of the moving frame 160 so that the moving frame 160 does not limit the movement within the movable range for performing the runout correction. .. Each arm can stably maintain such a state by the action of the stepping motor of the state switching drive unit 152.

FIG. 3 is a schematic diagram illustrating the state switching of the limiting mechanism 170. FIG. 3 shows a state of observation from the optical axis direction of the correction lens 121 as in FIG. 2, but the correction lens 121 and the moving frame 160 are omitted, and the main elements of the limiting mechanism 170 are schematically shown. ..

The limiting mechanism 170 has a drive ring 174 and a drive gear 175 in addition to the first arm 171a, the second arm 171b, and the third arm 171c described with reference to FIG. The drive ring 174 has a disk shape whose inside is hollowed out so as not to block the subject light flux. Further, the drive ring 174 has a first cam groove 174a through which the first cam pin 173a is inserted, a second cam groove 174b through which the second cam pin 173b is inserted, and a third cam groove 174c through which the third cam pin 173c is inserted. Further, a gear train 174e that meshes with the gear 175e of the drive gear 175 is provided on a part of the outer peripheral portion of the drive ring 174.

The drive gear 175 is rotationally driven by stepping of the state switching drive unit 152 via a gear train (not shown). When the drive gear 175 is rotationally driven, the drive ring 174 rotates. When the drive ring 174 rotates, the cam groove position with respect to each cam pin is displaced. When the cam pin follows the displacement of the cam groove position, the arms (first arm 171a, second arm 171b, third arm 171c) change the rotation pins (first rotation pin 172a, second rotation pin 172b, third time). It swings around the moving pin 172c). Each cam groove is provided so that the inserted cam pin approaches or moves away from the moving frame 160 side. Therefore, by driving the drive gear 175, the curved surfaces of the first arm 171a, the second arm 171b, and the third arm 171c (opposing surfaces facing the outer surface of the moving frame 160) approach the outer surface of the moving frame 160. Or move away.

FIG. 4 is a schematic diagram showing a locked state in which the moving frame 160 is fixed. When the first arm 171a, the second arm 171b, and the third arm 171c rotate in the direction of the arrow around the first rotation pin 172a, the second rotation pin 172b, and the third rotation pin 172c, respectively, due to the rotation of the drive ring 174. Eventually, each curved surface comes into contact with the outer surface of the moving frame 160. When each curved surface comes into contact with the outer surface of the moving frame 160, the moving frame 160 is fixed. That is, the moving frame 160 becomes physically immovable when the contact points are restrained at three points separated from the outer surface as indicated by a cross. The locked state is a state in which the moving frame 160 is fixed in this way among the states that the limiting mechanism 170 can take.

Here, in the locked state of the limiting mechanism 170, the optical axis op of the imaging optical system 110 and the optical axis cp of the correction lens 121 do not match. Originally, it is preferable that both optical axes coincide with each other. However, if an attempt is made to accurately match both optical axes in the locked state by a mechanical mechanism such as the limiting mechanism 170, the limiting mechanism becomes complicated, the unit cost increases, and the assembly process becomes difficult. Therefore, in the present embodiment, a relatively simple mechanical mechanism such as the limiting mechanism 170 is adopted to allow the disagreement of both optical axes in the locked state. However, if the two optical axes do not match in the locked state, the image quality may deteriorate, such as the image center position changing during zooming in the image pickup mode in which the shake correction is off. Therefore, the limiting mechanism 170 in the present embodiment may take a half-locked state in order to correspond to the image pickup mode in which the shake correction is turned off.

FIG. 5 is a schematic view showing a semi-locked state in which the moving frame 160 is semi-fixed. The semi-locked state is an intermediate state between the unlocked state shown in FIG. 2 and the locked state shown in FIG. 4, and one of the curved surfaces of the first arm 171a, the second arm 171b, and the third arm 171c moves. It is in contact with the outer surface of the frame 160.

As described above, the limiting mechanism 170 is assembled to the lens barrel, allowing the optical axis op of the imaging optical system 110 and the optical axis cp of the correction lens 121 to not match in the locked state. In such a case, if the moving frame 160 is held at a position where both optical axes coincide and each arm is rotated in the direction of the solid arrow, the curved surface of any one arm first becomes the outer surface of the moving frame 160. Contact. The figure shows how the curved surface of the second arm 171b is in contact with the outer surface of the moving frame 160 at the cross mark. The state of each arm is defined as a semi-locked state in the limiting mechanism 170.

In this state, when the control unit 150 sets the moving target position of the correction lens 121 at the coordinates (x0, y0) at the tip of the broken line arrow that cannot actually move, and performs feedback control, the moving frame 160 is marked with a cross. Keep pressed against the indicated contact points. The coordinates (x0, y0) that are the specified positions are on a straight line connecting the coincident optical axes and the contact points indicated by x marks, and are set on the side opposite to the optical axis side with respect to the contact points.

In this way, when each arm is fixed in a semi-locked state and the voice coil motor is controlled so as to keep the moving frame 160 pressed against a predetermined contact point of the specific arm, the light of the correction lens 121 is obtained. It is possible to maintain a state in which the axis is aligned with the optical axis of the imaging optical system 110. If such a state is maintained, high-quality zoom-in and zoom-out images can be obtained without changing the center of the image even if the zoom operation is performed during imaging.

The semi-locked state shown in FIG. 5 illustrates the state of a certain product solid in the mass-produced image pickup apparatus 100. That is, the semi-locked state may differ for each product due to factors such as an attachment error in which the limiting mechanism 170 is attached to the lens barrel and individual differences in the limiting mechanism 170. Therefore, in order to determine the arm position, the contact point, and the target position for feedback control in the semi-locked state, adjustments are made at the time of manufacturing the image pickup apparatus 100.

FIG. 6 is a schematic diagram illustrating the adjustment of the half-locked state. Here, when each arm is gradually rotated from the unlocked state, it is assumed that the curved surface of the second arm 171b first comes into contact with the outer surface of the moving frame 160, as in FIG.

For each arm, the rotation angle around the rotation pin is determined according to the step drive amount of the stepping motor. For example, if the number of rotation steps in the unlocked state is st = 0 and the number of rotation steps in the locked state is st = 255, the limiting mechanism 170 moves the frame 160 between the unlocked state and the locked state. It is possible to take a restricted state that limits the movement range of 254 steps. The semi-locked state is set by selecting one of a plurality of such restricted states.

FIG. 6A shows a state in which the number of rotation steps is st = 35. In this state, the amount of rotation of the second arm 171b is insufficient with respect to the half-locked state. If the outer surface of the moving frame 160 is brought into contact with the curved surface of the second arm 171b in this state, the optical axis cp of the correction lens 121 does not match the optical axis op of the imaging optical system 110 and tends toward the curved surface side. ..

FIG. 6B shows a state in which the number of rotation steps is st = 81. This state is a semi-locked state similar to the state shown in FIG. When the outer surface of the moving frame 160 is brought into contact with the curved surface of the second arm 171b in this state, the optical axis cp of the correction lens 121 coincides with the optical axis op of the imaging optical system 110. That is, the distance from the optical axis cp of the correction lens 121 to the contact point is equal to the radius r0 of the outer surface of the moving frame 160. When the matching of the optical axis cp of the correction lens 121 and the optical axis op of the imaging optical system 110 can be confirmed in this way, the number of rotation steps (here, st = 81) is set as the number of rotation steps in the semi-locked state. It is stored in the memory 133. Further, on the straight line connecting the optical axis cp and the contact point, the coordinates (x0, y0) as the movement target position of the correction lens 121 are set on the side opposite to the optical axis cp with respect to the contact point, and the memory 133 is stored. Remember.

FIG. 6C shows a state in which the number of rotation steps is st = 113. In this state, the amount of rotation of the second arm 171b exceeds the half-locked state. When the outer surface of the moving frame 160 is brought into contact with the curved surface of the second arm 171b in this state, the optical axis cp of the correction lens 121 does not coincide with the optical axis op of the imaging optical system 110 and is on the opposite side of the curved surface. I will stop by.

When the above-mentioned number of rotation steps and coordinate values are stored in the memory 133 through such adjustment, the control unit 150 can repeatedly and accurately reproduce the half-locked state when the image pickup apparatus 100 is used. That is, the control unit 150 drives the step motor up to the number of stored rotation steps to put the limiting mechanism 170 in a semi-locked state. Then, the voice coil motor is feedback-controlled with respect to the stored coordinates so that the moving frame 160 is kept pressed against the predetermined contact point. By such control, it is possible to maintain a state in which the optical axis cp of the correction lens 121 coincides with the optical axis op of the imaging optical system 110 in the image pickup mode in which the shake correction is off. Further, since the outer surface of the moving frame 160 is pressed against the contact portion of the arm with a constant force, the alignment of both optical axes is maintained even if some external force is applied to the image pickup apparatus.

Next, the processing flow executed by the image pickup apparatus 100 when used by the user will be described. FIG. 7 is a flow chart showing a processing flow of the image pickup apparatus 100. The processing flow shown here shows the main processing related to the image stabilization unit, and omits other processing associated with these processing.

When the image pickup apparatus 100 is activated, the control unit 150 confirms in step S201 whether the current mode is the image pickup mode or the reproduction mode. Here, the image pickup mode is not limited to the case of recording image data, but also includes the case of a viewfinder that does not involve recording of image data. The control unit 150 proceeds to step S202 when it confirms that it is in the imaging mode, and proceeds to step S207 when it confirms that it is in the reproduction mode.

Proceeding to step S202, the control unit 150 confirms whether the anti-vibration mode is set to on or off. The user can set the on / off of the vibration-proof mode by operating the mode changeover switch for switching between the vibration-proof mode and the non-vibration-proof mode, which is one of the operation members 140. If it is confirmed that the anti-vibration mode is set to on, the process proceeds to step S203, and if it is confirmed that the anti-vibration mode is set to off, the process proceeds to step S205.

Proceeding to step S203, the control unit 150 processes the anti-vibration mode. The anti-vibration mode is a mode in which the correction lens 121 is moved in response to the blurring applied to the image pickup device 100 to reduce the image shake of the subject image imaged on the image pickup element 130 and perform imaging. Specifically, the control unit 150 switches the limiting mechanism 170 to the unlocked state shown in FIG. 2 by sending a drive signal to the state switching drive unit 152 in step S203. Then, the process proceeds to step S204, and the moving frame 160 holding the correction lens 121 is moved by sending a drive signal corresponding to the blur detection signal to the moving frame driving unit 151. The control unit 150 receives an image pickup instruction from the user while continuing the process of step S204, and executes the image pickup process. The image image captured during this period has reduced image shake. Then, the process proceeds to step S209.

Proceeding to step S205, the control unit 150 performs the non-vibration mode processing. The non-vibration mode is a mode in which the movement of the correction lens 121 is stopped as described above to perform imaging. Specifically, the control unit 150 reads out the number of rotation steps in the semi-locked state from the memory 133 in step S205, and sends a drive signal corresponding to the number of rotation steps to the state switching drive unit 152 to obtain the limiting mechanism 170. Switch to the half-locked state shown in 5. Then, the process proceeds to step S206, the movement target position (x0, y0) is read from the memory 133, the target position of the movement frame 160 is set to the coordinates, and a drive signal is sent to the movement frame drive unit 151. The control unit 150 receives an image pickup instruction from the user while continuing the process of step S206, and executes the image pickup process. The image captured during this period is an image of a subject that has passed through a lens group in a state where the optical axis cp and the optical axis op are aligned. Then, the process proceeds to step S209.

Proceeding to step S207, the control unit 150 processes the reproduction mode. The playback mode is a mode for playing back an already recorded image file. In the reproduction mode, the control unit 150 switches the limiting mechanism 170 to the locked state shown in FIG. 4 by sending a drive signal to the state switching drive unit 152 in step S207. As a result, the moving frame 160 becomes physically immovable. Then, the process proceeds to step S208, and the driving of the moving frame driving unit 151 is stopped. The order of steps S207 and S208 may be reversed. As a result, even if the image pickup apparatus 100 is shaken during the processing of the reproduction mode, the moving frame 160 does not generate a rattling sound. Then, the process proceeds to step S209.

The control unit 150 confirms in step S209 whether or not the power off instruction has been received. If no instruction has been received, the process returns to step S201. If instructed, the process proceeds to step S210. In step S210, the control unit 150 switches the limiting mechanism 170 to the locked state shown in FIG. 4 by sending a drive signal to the state switching drive unit 152. Since the limiting mechanism 170 can maintain the locked state even when power is not supplied, the moving frame 160 does not generate a rattling sound even if the image pickup apparatus 100 is shaken when not in use. After switching the limiting mechanism 170 to the locked state, the control unit 150 cuts off the power supply and ends a series of processes.

In the present embodiment described above, the limiting mechanism 170 can take a plurality of limiting states between the locked state and the unlocked state, and one of them is selected as the semi-locked state. Not limited to. Even if there is only one limiting state between the locked state and the unlocked state, if that state is guaranteed to function as a semi-locked state by design, such a limiting mechanism should be adopted. Can be done.

Further, in the present embodiment described above, in order to keep the moving frame 160 pressed against a predetermined contact point, the coordinates (x0, y0) at which the moving frame 160 cannot move are set as the target position. Although the feedback control has been described, the control method is not limited to this. For example, vector control that defines the moving direction may be used.

Further, in the present embodiment described above, the image pickup apparatus 100 having a built-in lens unit has been described, but the lens unit may be attached to and detached from the main body unit as described above. In that case, the lens unit may be further composed of a unit of an imaging optical system and a unit of a correction optical system connected to each other. When the correction optical system unit including the limiting mechanism can be connected to various types of imaging optical system units, the semi-locked state, contact point, and moving target are adjusted to each imaging optical system unit. You may adjust the position.

Further, in the present embodiment described above, the outer surface of the moving frame 160 is a circumferential surface, and the facing surface of each arm is a curved surface. In this case, the contact between the two is a point contact or a line contact. However, for example, the outer surface of the moving frame 160 may be configured so that its cross section has a polygonal cross section, and may be configured by a series of rectangular planes. In this case, the facing surfaces of the arms may be configured as continuous planes in which small planes are connected so as to correspond to each of the rectangular planes. With this configuration, the contact between the two can be regarded as surface contact. If the outer surface of the moving frame 160 and the facing surface of the arm come into surface contact with each other, the position of the correction lens 121 can be maintained more stably even in the semi-locked state.

100 Imaging device, 110 Imaging optical system, 111 Zoom lens, 112 Focus lens, 120 Correction optical system, 121 Correction lens, 130 Imaging element, 131 Bus line, 132 AFE, 133 Memory, 134 Image processing unit, 135 Display processing unit 136 monitor, 137 output processing unit, 138 recording medium IF, 139 communication IF, 140 operation member, 150 control unit, 151 moving frame drive unit, 152 state switching drive unit, 153 focus drive unit, 154 zoom drive unit, 160 movement Frame, 161a 1st coil, 161b 2nd coil, 170 limiting mechanism, 171a 1st arm, 171b 2nd arm, 171c 3rd arm, 172a 1st rotation pin, 172b 2nd rotation pin, 172c 3rd rotation Pin, 173a 1st cam pin, 173b 2nd cam pin, 173c 3rd cam pin, 174 drive ring, 174a 1st cam groove, 174b 2nd cam groove, 174c 3rd cam groove, 174e gear train, 175 drive gear, 175e gear, 201 Recording medium

Claims (4)

An imaging optical system for forming a subject image on the light receiving surface of the image sensor,
A correction optical system having a correction lens and a moving frame that holds the correction lens and moves in a plane direction orthogonal to the optical axis of the correction lens.
It is a method of adjusting a lens unit including a state switching drive unit that rotates three arm members arranged on the outer surface side of the moving frame at predetermined intervals so as to determine a moving range of the moving frame. hand,
The three arm members are rotated so that the facing surfaces of the arm members are separated from the outer surface of the moving frame and approach the outer surface of the moving frame.
When the optical axis of the imaging optical system and the optical axis of the correction optical system coincide with each other in a state where at least one of the three arm members is in contact with the outer surface side of the moving frame. , An adjustment method for storing the amount of rotation of the arm member as the amount of rotation in a semi-locked state. When the three arm members are in the semi-locked state, they are on a straight line connecting the matched optical axis and the contact point of the arm member in contact with the moving frame, and the contact point is the same. Further memorize the coordinates that are the movement target positions of the correction lens on the side opposite to the optical axis.
The moving frame with respect to the stored coordinates so that the moving frame is kept pressed against the contact point when the three arm members are rotated with the stored rotation amount. The adjustment method according to claim 1, wherein the feedback control is performed. Image sensor and
An image pickup apparatus comprising the moving frame and a lens unit for controlling the three arm members by the adjustment method according to claim 1. An imaging optical system for forming a subject image on the light receiving surface of the image sensor,
A correction optical system having a correction lens and a moving frame that holds the correction lens and moves in a plane direction orthogonal to the optical axis of the correction lens.
With respect to the lens unit including the state switching drive unit for rotating the three arm members arranged on the outer surface side of the moving frame at predetermined intervals so as to determine the moving range of the moving frame.
A step of rotating the three arm members so that the facing surfaces of the arm members are closer to the outer surface of the moving frame from a state where the facing surfaces of the arm members are separated from the outer surface of the moving frame.
In the first step, the optical axis of the imaging optical system and the light of the correction optical system are in a state where at least one of the three arm members is in contact with the outer surface side of the moving frame. A step of storing the amount of rotation of the arm member as the amount of rotation in the semi-locked state when the axis coincides with the axis.
A control program for an image pickup device that causes a computer to execute.

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