JP2021120708A - Lens device and imaging apparatus - Google Patents

Abstract

To provide a lens device that is advantageous in terms of the reproducibility of a flange back.SOLUTION: A lens device (100) has an adjustment lens group (101), a driving unit (102) that drives the adjustment lens group, a control unit (107) that controls the driving unit, and a storage unit (106). The storage unit stores the relationship between the amount of correction for a reference position of the adjustment lens group in a first quantity of state related to the lens device and the respective quantities of state related to the lens device, and the control unit generates a control signal for controlling the driving unit based on the reference position, a second quantity of state related to the lens device and the relationship stored in the storage unit.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lens device and an imaging device.

A lens device in an imaging device such as a TV camera includes an operation unit for adjusting a flange back (back focus). The flange back of the lens device needs to be adjusted depending on the camera device on which the lens device is mounted and the environment (temperature, etc.) in which the lens device is placed. Therefore, when the flange back is not adjusted, the lens device may not be able to focus on a specific subject no matter how much the focus lens is operated. To prevent this, the user needs to accurately adjust the flange back in the combination of the lens device and the camera device.

Patent Document 1 discloses that an evaluation value of a video signal is displayed for adjusting the flange back. Such a configuration makes it possible to perform flange back adjustment accurately and easily. Further, Patent Document 2 discloses that the relationship between the position of the focus lens and the focus evaluation value is displayed for adjusting the flange back, and the readjustment or termination of the flange back is promoted. Such a configuration makes it possible to perform flange back adjustment accurately and easily.

Japanese Unexamined Patent Publication No. 2014-006398 Japanese Patent No. 4810292

Some lens devices are provided with a drive unit and a position detection unit for a lens group (also referred to as an adjustment lens group) for adjusting the flange back, and the flange back can be adjusted electrically. Further, by communicating between the lens device and the camera device, the flange back can be adjusted from a remote location away from the image pickup device without going through the above-mentioned operation unit. Further, in order to quickly reproduce the flange back obtained by the adjustment after the power supply of the lens device is turned on, it is preferable to memorize the position of the lens group corresponding to the flange back. By doing so, the flange back can be easily restored regardless of whether the flange back is changed by the above-mentioned operation in the operation unit or by the operation from a remote location (remote operation). ..

Here, the flange back may be displaced due to the state of optical elements other than the adjustment lens group (position of the lens group, etc.) and environmental factors. Factors of the deviation include the position of the zoom lens group and the focus lens group, the position of the aperture (aperture), the temperature, the atmospheric pressure, and the like. In order to compensate for the deviation, it is considered that the correction amount related to the flange back adjustment may be stored in advance for the state amount related to each factor. However, even if the adjustment lens group is driven based on the correction amount, the assumed flange back may not be reproduced. This will be described with reference to FIG. Here, FIG. 11 is a diagram for explaining a problem. The figure shows the positions 1001 and 1003 of the adjustment lens group and the positions 1002 and 1004 of the zoom lens group when the cause of the deviation is the position of the zoom lens group. It is assumed that the position of the adjustment lens group in which the flange back does not shift with respect to the position 1002 of the zoom lens group is 1001. Further, it is assumed that the position of the adjustment lens group in which the flange back does not shift with respect to the position 1004 of the zoom lens group is 1003. Here, consider a case where the power supply of the lens device is started with the zoom lens group located at 1004. In this case, even if the adjustment lens group is driven to the position 1001, the flange back will come off. If the position 1001 is not the reference position related to the correction amount, even if the adjustment lens group is driven based on the correction amount from the position 1001, the adjustment lens group is not located at the position 1003 and the flange back is displaced.

Further, consider a function (so-called shot function) in which the position of the adjustment lens group is stored in advance and the stored position is reproduced (reproduced) by a switch operation or the like. When the adjustment lens group is driven to the position 1001 by this function, the flange back does not come off if the position of the zoom lens group is 1002, but the flange back does not come off if the position of the zoom lens group is 1004.

Further, in shooting with a television camera, by driving an adjustment lens group having a higher focus sensitivity than the focus lens group, shooting may be intentionally out of focus from the subject. In the shooting, the operation of gradually shifting the focus from the in-focus subject and vice versa can be performed for the image effect (blurring effect). The operation can be performed using a dedicated operating member, and can also be performed by the shot function. In this case as well, the amount of focus shift (blurring amount) changes depending on the position of the zoom lens group, and the intended image may not be reproduced.

The above-mentioned flange back displacement may occur not only due to a change in the position of the zoom lens group but also due to a change in the state of other optical elements or a change in environmental factors. Therefore, in order to reproduce a specific flange back, the adjustment lens group needs to be driven based on a correction amount depending on various factors. An object of the present invention is, for example, to provide a lens device which is advantageous in terms of flange back reproducibility.

One aspect of the present invention is a lens device having an adjustment lens group, a drive unit for driving the adjustment lens group, a control unit for controlling the drive unit, and a storage unit.
The storage unit stores the relationship between the correction amount with respect to the reference position of the adjustment lens group in the first state amount related to the lens device and each state amount related to the lens device.
The control unit generates a control signal for controlling the drive unit based on the reference position, the second state quantity related to the lens device, and the relationship stored in the storage unit. It is a characteristic lens device.

According to the present invention, for example, it is possible to provide a lens device which is advantageous in terms of reproducibility of flange back.

The figure which shows the structural example of the lens apparatus which concerns on Embodiment 1. Diagram showing a configuration example of a control system Diagram illustrating the processing flow The figure which illustrates the positional relationship between the adjustment lens group and the zoom lens group. The figure which shows the structural example of the control system which concerns on Embodiment 2. Diagram illustrating the processing flow The figure which illustrates the positional relationship between the adjustment lens group and the zoom lens group. The figure which shows the structural example of the control system which concerns on Embodiment 3. Diagram illustrating the processing flow The figure which shows the configuration example of the image pickup apparatus Diagram to explain the problem

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In principle (unless otherwise specified), the same members and the like are designated by the same reference numerals throughout the drawings for explaining the embodiments, and the repeated description thereof will be omitted.

[Embodiment 1]
Hereinafter, the lens apparatus according to the first embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a diagram showing a configuration example of a lens device according to the first embodiment. Note that the figure shows not only the lens device 100 but also an imaging device including a camera device 200 equipped with the lens device 100 and the lens device 100. Here, the lens device 100 will be described. The lens device 100 includes a lens group 101 (also referred to as an adjustment lens group) for adjusting the flange back (back focus), a drive unit 102, a detection unit 103, a zoom lens group 104, a storage unit 106, a control unit 107, and a communication unit. It is configured to include 110.

The adjustment lens group 101 is a lens group that is driven to adjust the flange back (back focus) of the lens device 100. The adjustment lens group 101 is also driven for the above-mentioned blur effect (blurring function). The adjustment lens group 101 can also be driven by operating the operation device 300 described later connected to the lens device 100. It can also be driven by operating the operation unit included in the lens device 100.

The drive unit 102 drives the adjustment lens group 101, and may include, for example, a DC motor. The detection unit 103 detects the position of the adjustment lens group 101, and may include, for example, an encoder. The zoom lens group 104 is a lens group for changing the focal length, and the detection unit 105 detects the position of the zoom lens group 104, and may include, for example, an encoder. In the present embodiment, it is assumed that the flange back (back focus) changes when the position of the zoom lens group 104 changes.

The storage unit 106 stores data (adjustment amount or correction amount) for adjusting the flange back by moving the adjustment lens group 101, and may include, for example, a non-volatile memory such as EEPROM. The storage unit 106 also stores the position of the adjustment lens group when the flange back is adjusted. The control unit 107 has the functions of the first information generation unit 108 and the second information generation unit 109, which will be described later, and may include, for example, a processor such as a CPU. The first information generation unit 108 generates information on the correction amount (movement amount) of the adjustment lens group 101 for driving the adjustment lens group 101. The correction amount can be acquired based on the position information from the detection unit 105 and the data in the storage unit 106. The acquired correction amount is output to the second information generation unit 109. The second information generation unit 109 generates information on the reference position of the adjustment lens group. The reference position is the position of the adjustment lens group in the reference state (also referred to as the first state) of the lens device 100, which is not corrected by the above-mentioned correction amount. The second information generation unit 109 generates information on the reference position of the adjustment lens group based on the command input from the communication unit 110 and the operation device 300 and the correction amount information input from the first information generation unit 108. do. The details of the control unit will be described later.

The control unit 107 is input with the position information from the detection unit 103 and the detection unit 105. Based on these position information and the correction amount information generated by the first information generation unit 108, a control signal for driving the adjustment lens group 101 is generated, and a drive signal based on the generated control signal is generated by the drive unit 102. Output to. When the flange back is adjusted, the storage unit 106 stores the reference position of the adjustment lens group generated by the second information generation unit 109. The communication unit 110 communicates with the camera device 200. When a command or request from the camera device 200 is received, the command or request is output to the control unit 107. Further, the communication unit 110 transmits information from the control unit 107 as a response to the command or request to the camera device 200.

The camera device 200 has a communication unit 201 that communicates with the lens device 100, and the communication unit 201 transmits information regarding commands, requests, etc. to the lens device 100, and responds to the commands, requests, etc. Information about the lens device 100 is received from the lens device 100.

The operation device 300 is connected to the lens device 100, and in the present embodiment, when the above-mentioned blurring function is switched on or off, or when the blurring function is on, the operation of the blurring function (adjustment of the blurring amount). It shall be for doing. The operation can be performed by outputting an analog signal (parallel communication), or by serial communication via the communication unit 110.

Here, a method of generating a reference position of the adjustment lens group will be described with reference to FIG. FIG. 2 is a diagram showing a configuration example of a control system. The figure shows a configuration example relating to the generation of a control signal related to the driving of the adjusting lens group by the control unit 107 and the generation of the information of the reference position of the adjusting lens group obtained by the flange back adjustment. The control signal is obtained, for example, by the following equation (1).
Control signal (BF_Ctrl_Fin)
= Command (BF_Ctl + BF_Cam_Ctl) + Correction amount (α) ... (1)

BF_Ctl is a command from the operating device 300, and BF_Cam_Ctl is a command from the camera device 200.

Further, the drive signal is obtained by the following equation (2) using, for example, a control signal (BF_Ctrl_Fin), a position (Fol) of the adjustment lens group, and a control gain (β).
Drive signal (Ctrl_Out)
= (Control signal (BF_Ctrl_Fin) -Position of adjustment lens group (Fol))
× Control gain (β) ・ ・ ・ (2)

Further, the reference position of the adjustment lens group obtained by the flange back adjustment can be obtained by, for example, the following equation (3).
Reference position (MemPosi)
= Control signal (BF_Ctrl_Fin) -Correction amount (α) ... (3)

When the control unit 107 (second information generation unit 109) stores the reference position information of the adjustment lens group obtained by the flange back adjustment in the storage unit 106, the reference position information obtained by the equation (3). To generate. Further, the control signal for driving the adjustment lens group when the lens device is activated (the power is turned on to the lens device) can be obtained by, for example, the following equation (4).
Control signal (BF_Ctrl_Fin)
= Reference position (MemPosi) + Correction amount (α) ・ ・ ・ (4)

Here, FIG. 3 is a diagram illustrating a flow of processing according to the present embodiment. The process is performed by the control unit 107. In the figure, first, when the lens device 100 is turned on and started, the process proceeds to step S301. In step S301, the reference position of the adjustment lens group is read out from the storage unit 106, and the process proceeds to step S302. In step S302, it is determined whether the reference position of the adjustment lens group read out in step S301 is normal, and if it is normal, the process proceeds to step S303, and if not, the process ends. Instead of ending the process, a process that prompts the input or change of the reference position may be performed.

In step S303, information on the position of the zoom lens group is acquired from the detection unit 105, and the process proceeds to step S304. In step S304, it is determined whether the position of the zoom lens group acquired in step S303 is normal, and if it is normal, the process proceeds to step S305, and if not, the process proceeds to step S306. In step S305, the correction amount information stored in the storage unit 106 is read out based on the position of the zoom lens group acquired in step S303, and the process proceeds to step S307. In step S306, error processing is performed and the processing is terminated. The error processing is, for example, a processing for outputting to a display device that the position of the zoom lens group is abnormal. In step S307, the control signal obtained by the equation (4) is generated, and the process proceeds to step S308. In step S308, the drive signal obtained by the equation (2) is generated, and the process is completed.

Subsequently, the effect obtained by the present embodiment will be described with reference to FIG. Here, FIG. 4 is a diagram illustrating the positional relationship between the adjustment lens group and the zoom lens group. In the figure, 40 indicates a reference position of the adjustment lens group, 41 indicates the position of the adjustment lens group obtained by adjusting the flange back, and 42 indicates the position of the zoom lens group at the time of the adjustment. Further, when the zoom lens group is located at 44, the correction amount with respect to the reference position of the adjustment lens group is different from the case where the zoom lens group is located at 42. Therefore, when the adjustment lens group is located at 43, the flange back is generated. It shall be appropriate (within the allowable range). Here, when the power of the lens device 100 is turned off with the flange back adjusted and then the power is turned on, the zoom lens group is located at 44 and the adjusted lens group is located at 41. Consider the case. In this case, according to the processing flow shown in FIG. 3, a correction amount based on the position of the zoom lens group when the power is turned on is applied to the reference position 40 of the adjustment lens group, and the adjustment lens group Will be driven to be located at 43. As a result, the flange back can be adjusted immediately after the lens device is started. If this embodiment is not applied, when the lens device is activated, the adjustment lens group applies the correction amount to the position 41 other than the reference position 40, and the flange back becomes inappropriate. If the correction amount is not applied, the flange back will shift due to the change in the position of the zoom lens group.

As described above, the storage unit stores the relationship between the correction amount with respect to the reference position of the adjustment lens group in the first state amount related to the lens device and each state amount related to the lens device. Further, the control unit generates a control signal for controlling the drive unit based on the reference position, the second state quantity related to the lens device, and the relationship stored in the storage unit. With such a configuration, when the lens device is started, it is possible to reproduce the state in which the flange back is adjusted. Therefore, according to the present embodiment, for example, the lens device which is advantageous in terms of the reproducibility of the flange back. Can be provided.

The flange back can be adjusted by the following procedure under specific conditions (within the allowable range) (corresponding to the first state quantity).

(1) Remove the extender lens group (or make it 1x) and open the aperture.
(2) Move the zoom lens group to the telephoto end.
(3) Move the focus lens group to focus on an object at a specific distance.
(4) Move the zoom lens group to the wide end.
(5) Move the adjustment lens group to focus on the above object.
(6) Repeat steps (2) to (5) above two or three times.
(7) The position of the adjustment lens group is stored in the storage unit as a reference position.

In the above configuration, the state quantity (each state quantity) related to the flange back is the position of the zoom lens group, but is not limited thereto. The amount of the state is, for example, the position (object distance) of the focus lens group, the aperture amount of the aperture diaphragm, the insertion / removal or magnification of the extender lens group, and the environment (temperature and pressure) in which the lens device is placed. It may include those relating to at least one of (altitude, etc.). Such a state quantity may be detected by the lens device, or the information may be acquired by the lens device from the outside of the lens device.

Further, as shown in FIG. 2, in the above configuration, the command to the control unit is obtained by adding the command from the operating device and the command from the camera device, but the command is not limited thereto. The command may be obtained by selecting at least one of a plurality of commands input to the lens device, for example.

Further, in the above configuration, the adjustment lens group is a lens group for adjusting the flange back (back focus), but the present invention is not limited thereto. The adjustment lens group may be another lens group as long as the change in the characteristics of the lens device due to the change in the state quantity related to the lens device can be compensated for by the change in the position.

[Embodiment 2]
The lens device (imaging device) according to the second embodiment will be described with reference to FIGS. 1 and 5 to 7. The lens device of the present embodiment is different from that of the first embodiment in that the shot function is executed. The shot function is a function of preliminarily storing information on the position of a specific lens group (zoom lens group, focus lens group, etc.) in the lens device in a storage unit in the operating device 300 or the like. Then, by operating a specific switch, it is a function of issuing a shot command to the control unit so as to reproduce the stored position (drive the lens group to the position). It is not necessary for the operating device 300 to have the shot function. For example, when the target of the shot function is a lens group for adjusting the flange back, the camera device may have the shot function. In this case, since the conventional shot function stores the information on the position of the lens group output from the lens device, the information needs to be the information on the reference position of the adjustment lens group. Hereinafter, a case where the camera device executes the shot function will be described.

A mode for generating information on the position of the adjustment lens group to be transmitted to the camera device will be described with reference to FIG. Here, FIG. 5 is a diagram showing a configuration example of the control system according to the second embodiment. In the figure, the control signal related to the driving of the adjustment lens group in the control unit is obtained by the following equation (5).
Control signal (BF_Ctrl_Fin)
= Shot command (BF_Ctrl_Sht) + correction amount (α) ... (5)

The drive signal for the drive unit is obtained by the equation (2) in the first embodiment using the control signal (BF_Ctrl_Fin), the position (Fol) of the adjustment lens group, and the control gain (β).

The position of the adjustment lens group (external output position) output to the camera device can be obtained by the following equation (6).
External output position (OutFol)
= Control signal (BF_Ctrl_Fin) -Correction amount (α) ... (6)

Since the right side of the equation (6) is the same as the right side of the equation (3), the external output position can be obtained as a reference position obtained by the second information generation unit 109. The camera device stores the external output position (OutFol) in order to store the position of the adjustment lens group related to the shot function. Therefore, the shot command (BF_Ctrl_Sht) from the camera device corresponds to the external output position (OutFol) output by the lens device at a certain point in time.

A process of generating a drive signal for the drive unit will be described with reference to FIG. Here, FIG. 6 is a diagram illustrating a flow of processing according to the second embodiment. This process is performed by the control unit 107 when a shot command is input. The processing of steps S303 to S306 is the same as that in FIG. Following the process of step S305, the process proceeds to step S601. In step S601, a control signal is generated by the equation (5), and the process proceeds to step S308. The process of step S308 is the same as that in FIG. 3, and after the process, all the processes are terminated.

Subsequently, the effect obtained by the present embodiment will be described with reference to FIG. 7. Here, FIG. 7 is a diagram illustrating the positional relationship between the adjustment lens group and the zoom lens group. In the figure, 70 is the reference position of the adjustment lens group, 71 is the position of the adjustment lens group obtained by correction with the correction amount when the zoom lens group is located at 72, and 73 is the position of the zoom lens group of 74. It is the position of the adjustment lens group obtained by the correction with the correction amount when it is positioned.

In FIG. 7A, the shot command in the shot function corresponds to the position 70, the position of the zoom lens group is 72, and the position of the adjustment lens group is 71. Here, when the position of the zoom lens group is changed to 74, the position of the adjustment lens group becomes the position 73 obtained by the correction with the correction amount, and the flange back becomes appropriate (within the allowable range). If this embodiment is not applied, the storage position and playback position of the correction lens group by the shot function will be 71, and even if the position 71 is corrected by the correction amount based on the position of the zoom lens group, the flange back will come off. Can be a lens.

In FIG. 7B, consider a case where the shot command in the shot function corresponds to the position 70 and the flange back does not match at the position 70 because the camera device is replaced. Here, it is assumed that the adjustment lens group is moved to the position 70', the flange back is aligned, and the position related to the shot function stored in advance in the camera device is set to 70'. In such a case, if the zoom lens group is located at 72, the adjustment lens group is located at 71', and if the zoom lens group is located at 74, the adjustment lens group is located at 73', so that the flange back is in an appropriate state. Can be maintained. If this embodiment is not applied, the storage position and playback position of the correction lens group by the shot function will be 71, and even if the position 71 is corrected by the correction amount based on the position of the zoom lens group, the flange back will come off. Can be a lens.

As described above, the storage unit stores the relationship between the correction amount with respect to the reference position of the adjustment lens group in the first state amount related to the lens device and each state amount related to the lens device. Further, the control unit generates a control signal for controlling the drive unit based on the reference position, the second state quantity related to the lens device, and the relationship stored in the storage unit. Further, when the control unit outputs information regarding the position of the adjustment lens group to an external device, the information is used as information regarding the reference position, and when a command regarding the position of the adjustment lens group is input from the external device, the command is given. Is corrected based on the second state quantity and the relationship. With such a configuration, when the shot function is executed, it is possible to reproduce the state in which the flange back is adjusted. Therefore, according to the present embodiment, for example, a lens device which is advantageous in terms of reproducibility of the flange back. Can be provided.

The external device as the output destination (transmission destination) of the above-mentioned external output position is not limited to the camera device, but may be the operation device 300 or another device capable of operating the adjustment lens group. good. Further, the external device includes a camera device on which the lens device 100 is mounted, an operation device for operating the lens device 100, an image processing device for processing image data obtained via the lens device 100, and a lens device 100. It may include at least one of different lens devices. Further, the configuration of the present embodiment is not limited to the shot function, and a function in an external device that stores the position of the lens group related to the end of the drive range in order to limit the drive range of the lens group ( It may be a so-called tracking function).

[Embodiment 3]
The lens device (imaging device) according to the third embodiment will be described with reference to FIGS. 1 and 8 to 9. The present embodiment is different from the above-described embodiment in that the operating device 300 has a function (also referred to as a blurring function) for operating the blurring effect of the lens device 100. The blur function is a function that commands a position obtained by adding a blur amount to the position of the adjustment lens group. Here, if the command is a command obtained by correction with a correction amount related to the flange back adjustment, it may not be possible to obtain a blurring effect desired by the user.

FIG. 8 is a diagram showing a configuration example of the control system according to the third embodiment. A blur command is input to the control unit 107 from the operation device 300. In the figure, when the blurring function is on, the control signal related to the driving of the adjustment lens group in the control unit 107 is obtained by the following equation (7).
Control signal (M_Ctrl_Fin)
= Directive (BF_Ctl + BF_Cam_Ctl)
+ Correction amount (α)
+ Blur amount (M_Ctl) ・ ・ ・ (7)

The drive signal is obtained by the following equation (8), for example, using the control signal (M_Ctrl_Fin), the position (Fol) of the adjustment lens group, and the control gain (β).
Drive signal (Ctrl_Out)
= (Control signal (M_Ctrl_Fin)
-Position of adjustment lens group (Fol))
× Control gain (β) ・ ・ ・ (8)

Further, the external output position 2 related to the adjustment lens group obtained by changing the blur amount by the adjustment lens group is obtained by the following equation (9). For example, this external output position 2 is required for an operating device having a blurring function.
External output position 2 (OutMFol)
= Control signal (M_Ctrl_Fin) -Correction amount (α) ... (9)

Further, the external output position 1 related to the adjustment lens group for the operation function that does not need to consider the blur amount due to the adjustment lens group can be obtained by the following equation (10). For example, this external output position 1 is required for the operation function of adjusting the flange back.
External output position 1 (OutBFFol)
= Control signal (M_Ctrl_Fin)
-Blur amount (M_Ctl)
-Correction amount (α) ・ ・ ・ (10)

Subsequently, with reference to FIG. 9, a process when the lens device 100 is requested to have an external output position will be described. Here, FIG. 9 is a diagram illustrating a flow of processing according to the present embodiment. The process is performed by the control unit 107. First, when an external device (operation device 300) requests an external output position (position of the adjustment lens group), the process proceeds to step S901. In step S901, the information of the reference position of the adjustment lens group generated by the second information generation unit 109 is acquired, and the process proceeds to step S902. In step S902, it is determined whether the reference position acquired in step S901 is normal, and if it is normal, the process proceeds to step S903, and if not, the process ends. In step S903, the correction amount information and the blur amount (zero when the blur function is off) information generated by the first information generation unit 108 are acquired, and the process proceeds to step S904.

In step S904, the information of the external output position is obtained based on the information of the reference position acquired in step S901 and the information acquired in step S903, and the process proceeds to step S905. The external output position 2 is obtained by the equation (9), and the external output position 1 is obtained by the equation (10). The external output position 1 and the external output position 2 may be selectively obtained depending on the type and state of the operation device 300 (external device) (for example, the on state or the off state of the blur function) and the request. In step S905, the information of the external output position acquired in step S904 is output (transmitted) to the communication unit 110, and the process is completed. The external output position 1 and the external output position 2 can be selectively output depending on the type and state of the operation device 300 (external device) (for example, the on state or the off state of the blur function) and the request.

As described above, the storage unit stores the relationship between the correction amount with respect to the reference position of the adjustment lens group in the first state amount related to the lens device and each state amount related to the lens device. Further, the control unit generates a control signal for controlling the drive unit based on the reference position, the second state quantity related to the lens device, and the relationship stored in the storage unit. Further, when the control unit outputs information regarding the position of the adjustment lens group to an external device, the information is used as information regarding the reference position, and when a command regarding the position of the adjustment lens group is input from the external device, the command is given. Is corrected based on the second state quantity and the relationship. When the external device has a function of driving the adjustment lens group to control the amount of blurring of the image formed by the lens device, the control unit outputs information on the position of the adjustment lens group obtained by changing the amount of blurring to the external device. Output to. When the external device does not have a function to operate the blur amount, the control unit provides information on the position of the adjustment lens group when the position of the adjustment lens group is changed by the blur amount but is not changed. Is output to an external device. Further, the information regarding the position of the adjustment lens group is the information regarding the position of the adjustment lens group that has not been corrected by the correction amount in any case. With such a configuration, it is possible to output (transmit) information on the external output position, which is advantageous for maintaining the adjusted state of the flange back, even to an external device having a blurring function. Therefore, according to the present embodiment, for example, it is possible to provide a lens device which is advantageous in terms of reproducibility of the flange back.

In addition, instead of the information of at least one of the external output position 1 and the external output position 2, the information of one of the external output position 1 and the external output position 2 and the information of the blur amount are exchanged with the external device (operation device). You may send it to.

[Embodiment of Imaging Device]
FIG. 10 is a diagram showing a configuration example of an imaging device. The image pickup device may be an image pickup device having the lens device 100 exemplified above and an image pickup device 200a (including a camera device (imaging device main body) 200) for capturing an image formed by the lens device. In that case, the lens device 100 may or may not be interchangeably attached to the camera device 200.

Although the preferred embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.

100 Lens device 101 Adjustment lens group 102 Drive unit 106 Storage unit 107 Control unit

Claims (12)

A lens device having an adjusting lens group, a driving unit for driving the adjusting lens group, a control unit for controlling the driving unit, and a storage unit.
The storage unit stores the relationship between the correction amount with respect to the reference position of the adjustment lens group in the first state amount related to the lens device and each state amount related to the lens device.
The control unit generates a control signal for controlling the drive unit based on the reference position, the second state quantity related to the lens device, and the relationship stored in the storage unit. A featured lens device. It has a first detection unit that detects the position of the adjustment lens group.
The first aspect of the present invention is characterized in that the control unit generates a drive signal for the drive unit based on the position information of the adjustment lens group detected by the first detection unit and the control signal. The lens device described. 1 or claim 1, wherein the control unit generates the control signal based on the reference position, the second state quantity, and the relationship when the power is turned on to the lens device. Item 2. The lens device according to item 2. When the control unit outputs information regarding the position of the adjustment lens group to an external device, the information is used as information regarding the reference position, and when a command regarding the position of the adjustment lens group is input from the external device, the control unit receives information regarding the position of the adjustment lens group. The lens device according to any one of claims 1 to 3, wherein the command is corrected based on the second state quantity and the relationship. The lens device according to any one of claims 1 to 4, wherein the lens device has a second detection unit that detects a state quantity related to the lens device. The lens device according to any one of claims 1 to 5, wherein the adjustment lens group is a lens group for adjusting the flange back of the lens device. The lens device according to claim 6, wherein when the control unit outputs information regarding the position of the adjustment lens group to an external device, the information is different depending on the external device. The control unit
When the external device has a function of driving the adjustment lens group and operating the blur amount of the image formed by the lens device, the information regarding the position of the adjustment lens group obtained by the change by the blur amount is described. Output to an external device
When the external device does not have the function of operating the blur amount, even if the position of the adjustment lens group is changed by the blur amount, the information regarding the position of the adjustment lens group when the change is not performed can be obtained. Output to the external device,
The lens device according to claim 7. Any one of claims 1 to 8, wherein each state quantity relates to at least one of a zoom lens group, a focus lens group, an aperture diaphragm, an extender lens group, a temperature, an atmospheric pressure, and an altitude. The lens device according to the section. The external device includes a camera device to which the lens device is mounted, an operation device for operating the lens device, an image processing device for processing image data obtained via the lens device, and a lens different from the lens device. The lens device according to claim 7, wherein the lens device includes at least one of the devices. The lens device according to any one of claims 1 to 10, wherein the storage unit stores the reference position. The lens device according to any one of claims 1 to 11.
An image sensor that captures an image formed by the lens device,
An imaging device characterized by having.

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