JP2004012541A - Optical device, optical device driving unit and camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein driving torque necessary for servo-driving a lens is changed more largely than usual in the case of using an optical device in a low temperature state or in a state where the lens is tilted. <P>SOLUTION: In the optical device driving unit 20 having a servo driving system 7 generating driving force for driving the lens and other optical adjusting means 1, and a connection means 5 for connecting the servo driving system to the optical adjusting means so as to transmit the driving force, and also having a servo operation part 11 outputting a control signal for driving the servo driving system in accordance with the operation of an operation member, connection torque is varied between the input side and the output side of the connection means. The unit 20 is provided with a temperature detection means 15 for detecting outside air temperature, an inclination detection means 16 for detecting the inclination of the driving unit from a horizontal state, and a control means 14 changing the connection torque of the connection means based on a control signal and at least either of output from the temperature detection means and output from the inclination detection means. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lens device used for an optical device such as a television camera and a video camera.
[0002]
[Prior art]
Conventionally, in switching between a servo mode and a manual mode of a zoom lens in a TV lens, as described in Japanese Patent Application Laid-Open No. H11-344660, an electrical connection has been proposed in order to eliminate manual switching. There is a device using a switching mechanism typified by an electromagnetic clutch capable of switching (ON / OFF).
[0003]
Also, in the servo mode, based on a zoom control signal output in accordance with the operation amount of the zoom operation member operated to servo-drive the zoom lens, an electromagnetic wave such as idling that does not adversely affect the driving is provided. There is also a type in which the clutch torque is calculated, the electromagnetic clutch is connected using the torque, and the zoom lens is servo-driven. When the zoom control signal is equal to or less than a certain threshold, the electromagnetic clutch is not connected to enable the manual operation of the zoom lens, and the manual switching between the servo mode and the manual mode is eliminated.
[0004]
Here, a zoom lens device having the above function will be described with reference to FIG. In FIG. 7, reference numeral 101 denotes a photographing lens, 101a denotes a zoom drive ring provided on the photographing lens 101, and 2 denotes a signal corresponding to the position of the zoom lens in response to movement between the wide end and the tele end of the zoom lens. The zoom position detector 3 is attached to a rotating shaft of the zoom position detector 2, meshes with a zoom drive ring 1a of the photographing lens body 1, and is an idler gear that rotates in conjunction with the rotation.
[0005]
Reference numeral 4 denotes an A / D converter for converting a zoom position analog signal output from the zoom position detector 2 into a digital signal. Reference numeral 5 denotes an electrically connectable ON / OFF represented by an electromagnetic clutch, which is input. A connection mechanism 6 that can vary the torque at the time of connection (connection torque) in accordance with a signal, meshes with a zoom drive ring 1a in the photographing lens body 1, and rotates an idler gear in conjunction with a drive motor 7, which will be described later. A driving motor 8 to be driven is a driving circuit for driving the driving motor 7.
[0006]
Reference numeral 9 denotes a D / A converter which converts a digital drive signal output from a CPU 14 to be described later into an analog drive signal, and outputs the analog drive signal to the drive circuit 8. A / D converter for converting into a signal, 11 is a zoom operation unit (demand or the like) for outputting a control signal from outside for driving the zoom, and 12 is an input from a CPU 14 via a D / A converter 13 described later. A connection torque control circuit 13 for varying the connection ON / OFF and the connection torque in the connection mechanism 5 in accordance with the connection torque control signal to be transmitted. A connection torque control circuit 13 converts a digital connection torque control signal output from a CPU 14 described later into an analog signal. D / A converter for outputting to the connection torque control circuit 12, Denotes a CPU for controlling the zoom lens device.
[0007]
When the zoom operation unit 11 is operated, a control signal corresponding to the operation amount is output, and the control signal is input to the CPU 14 via the A / D converter 10. If the control signal exceeds a certain threshold, the CPU 14 determines that the mode is the servo mode. The CPU 14 converts the input control signal into a drive signal and outputs the drive signal to the D / A converter 9. In the D / A converter 9, the drive signal is converted into an analog signal, and the drive circuit 8 drives the drive motor 7 with the analog signal.
[0008]
Further, the CPU 14 calculates the connection torque based on the input zoom control signal in order to connect the connection mechanism 5, outputs the calculation result to the connection torque control circuit 12 via the D / A converter 13, and The mechanism 5 is connected with the calculated connection torque.
[0009]
Here, a drive signal is used as a parameter for determining how much connection torque is used to connect the connection mechanism 5, and the value is X.
[0010]
Further, the target connection torque Y ′ is calculated by the obtained X and the reference connection torque minimum value a.
Y '= a + bX
And
[0011]
The connection mechanism 5 can change the connection torque according to the input control signal, and the connection torque increases as the input signal increases. Here, the case where the connection torque Y is calculated by a linear equation has been described, but it may be calculated by a quadratic equation or another polynomial.
[0012]
The above “a” indicates that the drive signal when the control signal from the zoom operation unit 11 is a threshold value, that is, when the zoom lens is driven by the drive signal calculated from the minimum zoom control signal that can be servo-driven, causes the idle rotation. Is the minimum connection torque that can be driven without stopping. When the zoom control signal is equal to or less than the threshold value, the connection mechanism 5 does not connect the drive motor 7 and the idler gear b, thereby enabling a manual operation of the zoom lens.
[0013]
In the case of b, since the zoom speed increases as the drive signal increases, the connection torque slips and idles only with the connection torque based on the minimum value a of the connection torque, so that the connection torque is reduced in proportion to the drive signal. This is the parameter to be changed. Further, a and b are also parameters for correcting the torque required for the rotational drive when the lens device is different.
[0014]
When the connection mechanism 5 is connected, the drive motor 7 is connected to the zoom drive ring 1 a via the idler gear 6, so that the rotation of the drive motor 7 is transmitted to the zoom drive ring 1 a via the idler gear 6. Thus, the zoom lens can be servo-driven.
[0015]
In this manner, by changing the connection torque of the connection mechanism 5 or disconnecting the connection mechanism 5 in accordance with the operation of the zoom operation unit 11, the servo mode and the manual mode can be switched without performing the manual switching operation. The mode can be switched.
[0016]
[Problems to be solved by the invention]
However, when shooting conditions are lower than normal, or when shooting with the lens tilted downward or upward, the driving torque required to servo-drive the lens is lower than in the normal case. May change significantly.
[0017]
In the above-mentioned conventional example, such a photographing condition is not taken into consideration, and when the photographing condition is used as described above, there is a possibility that trouble such as idling and slippage of the connection mechanism may occur.
[0018]
SUMMARY OF THE INVENTION The present invention provides an optical device and an optical device drive capable of reliably performing servo drive of an optical adjustment unit even under various use conditions, and performing servo drive and manual drive without performing a manual switching operation. It is intended to provide units.
[0019]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, there is provided a servo drive system for generating a driving force for driving a lens or other optical adjustment means, and a connection for connecting the servo drive system to the optical adjustment means so as to transmit a driving force. And a servo operating unit that outputs a control signal for driving a servo drive system in accordance with the operation of the operating member. In an optical device or an optical device driving unit in which a connection torque between an input side and an output side of the optical device is variable, a temperature detecting means for detecting an outside air temperature, and an inclination detecting means for detecting an inclination of the optical device from a horizontal state And the connection torque of the connection means based on at least one of the control signal, the output of the temperature detection means, and the output of the inclination detection means. And control means are provided for.
[0020]
Thus, the connection torque in the connection means is set not only in accordance with the output of the servo drive system in accordance with the control signal, but also based on use conditions such as the outside air temperature and the inclination of the device at that time. Therefore, it is possible to reliably perform the servo drive of the optical adjustment unit even under various use conditions, and to perform the servo drive and the manual drive without performing the manual switching operation.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
FIGS. 1 and 2 show a zoom lens system (optical device system) according to a first embodiment of the present invention. In these figures, reference numeral 1 denotes a photographing lens (optical device) which is mounted on a television camera and a video camera (not shown) to constitute a camera system, and 1a denotes a zoom drive ring provided on the photographing lens 1.
[0022]
Reference numeral 20 denotes a lens drive unit (optical device drive unit) mounted on the taking lens 1. In this lens drive unit 20, reference numeral 2 denotes a zoom position detector which outputs a signal corresponding to the position in conjunction with movement between the wide end and the tele end of the zoom, and reference numeral 3 denotes a rotary shaft of the zoom position detector 2. This is an idler gear that meshes with the zoom drive ring 1a on the taking lens 1 and rotates in conjunction with its rotation. Reference numeral 4 denotes an A / D converter for converting a zoom position analog signal output from the zoom position detector 2 into a digital signal.
[0023]
Reference numeral 5 denotes a connection mechanism typified by an electromagnetic clutch, which controls the rotation of an input-side member (not shown) connected to a drive motor 7 to be described later, and an output connected to a zoom drive ring 1 a via an idler gear 6. It is transmitted to a member (not shown) on the side by friction or the like. Further, the connection between the input side member and the output side member can be turned on / off by turning on / off the energization, and the pressure contact force between the input side member and the output side member can be changed by changing the value of the electric signal to be energized. For example, the connection torque can be changed and set.
[0024]
For example, by driving the driving motor 7 while the connection of the connection mechanism 5 is turned on, the driving force of the driving motor 7 is transmitted to the zoom lens via the zoom driving ring 1a, and the zoom is driven. When the zoom drive ring 1a is manually operated during the zoom drive, the CPU 14 described later normally drives the zoom lens moving speed (change rate of the zoom position detected by the zoom position detector 2) by the drive motor 7. It is determined whether or not the speed, direction, and the like are different from each other, and if the speed is different, the connection of the connection mechanism 5 is turned off assuming that the manual operation was performed during the servo drive, and the zoom lens can be manually operated. Then, when the zoom operation unit 11 is operated again, the CPU 14 turns on the connection of the connection mechanism 5 to enable the servo drive of the zoom lens.
[0025]
Reference numeral 6 denotes an idler gear that meshes with a zoom drive ring 1a on the photographing lens 1 and rotates in conjunction with a zoom drive motor 7 described later. Reference numeral 7 denotes a drive motor that generates a zoom drive force. Reference numeral 8 drives the zoom drive motor 7. A driving circuit 9 for converting a digital driving signal output from the CPU 14 to be described later into an analog driving signal and outputting the analog driving signal to the driving circuit 8; A / D converter that converts an analog signal (a zoom control signal described later) into a digital signal. When a seesaw switch (not shown) is operated, the zoom operation unit 11 outputs a zoom control signal (analog signal) corresponding to the operation direction and operation amount.
[0026]
Reference numeral 12 denotes a connection torque control circuit, which performs ON / OFF switching of the connection of the connection mechanism 5 in accordance with a connection torque control signal input from the CPU 14 via a D / A converter 13 to be described later. The connection torque is variably set.
[0027]
Reference numeral 13 denotes a D / A converter that converts a connection torque control signal, which is a digital signal output from the CPU 14 described later, into an analog signal and outputs the analog signal to the connection torque control circuit 12. Reference numeral 14 denotes a CPU that controls the lens drive unit 20. Reference numeral 15 denotes a temperature detector for detecting an outside air temperature at the time of photographing, and 16 denotes a drive unit at the time of photographing (that is, a zoom lens device to which the device is attached or a camera system having a zoom lens device attached to a camera not shown). ) Is a tilt detector for detecting a tilt with respect to the horizontal state.
[0028]
An A / D converter 17 converts an analog signal indicating the outside air temperature output from the temperature detector 15 to a digital signal, and 18 converts an analog signal indicating the above-mentioned inclination output from the inclination detector 16 into a digital signal. An A / D converter.
[0029]
Next, control in the drive unit of the present embodiment will be described with reference to flowcharts shown in FIGS. First, the basic control operation will be described with reference to the flowchart of FIG.
[0030]
When the power is turned on, the power is supplied to the CPU 14 and the like, and the CPU 14 performs predetermined initial settings (step 1). In this initial setting, in addition to the initial setting for operating the software, the initialization of data serving as parameters required in the present embodiment is also performed.
[0031]
Specifically, the outside air temperature in the environment where the current drive unit 20 is located is detected. As shown in FIGS. 1 and 2, the drive unit 20 has a temperature detector 15 typified by a temperature sensor for detecting the ambient air temperature, and detects the inclination of the drive unit 20 with respect to the horizontal direction. Detector 16 typified by a tilt angle sensor is provided. The temperature detector 15 and the tilt detector 16 are built in the drive unit 20 and are fixed.
[0032]
The data (temperature data temp_data and inclination data incli_data) output from the temperature detector 15 and the inclination detector 16 are converted into digital signals that can be input to the CPU 14 by the A / D converters 17 and 18, respectively. Is entered. Note that these signals may be directly input to the CPU 14 as long as the detector can output each data as digital data.
[0033]
Next, the current zoom position is detected. A zoom position detector 2 is connected to a zoom drive ring 1a on the photographing lens 1 via an idler gear 3. When the zoom drive ring 1a rotates, the zoom position detector 2 also rotates in conjunction with the rotation. A zoom position signal (analog signal) corresponding to the position is output. The zoom position signal is converted into digital data by the A / D converter 4 and input to the CPU 14 as zoom position data ZOOM_POS.
[0034]
Further, the CPU 14 initializes the connection torque Y and the target target torque = Y ′ as Y = Y ′ = 0.
[0035]
When the above-described initialization is completed, the process proceeds to step 2, where the zoom control signal output in response to the operation of the zoom operation unit 11 is converted into a digital signal by the A / D converter 10 and input to the CPU 14. When the operation of the zoom operation unit 11 is not performed, the center value of the zoom operation unit 11 is input to the CPU 14.
[0036]
Next, the CPU 14 proceeds to a zoom position input subroutine for checking the current zoom position (step 3).
[0037]
This zoom position input subroutine will be described with reference to the flowchart of FIG. Here, first, the value of data ZOOM_POS obtained by converting the zoom position signal (analog signal) from the zoom position detector 2 into a digital signal by the A / D converter 4 is set in PRE_ZOOM_POS (step 101). Here, the PRE_ZOOM_POS is stored as zoom position data at the time of the previous zoom position detection.
[0038]
Next, the A / D converter 4 converts the zoom position signal output from the zoom position detector 2 into a digital signal, and sets the digital signal to the current zoom position data ZOOM_POS (step 102). When the zoom position input subroutine ends, the process proceeds to step 4 in FIG.
[0039]
In step 4, it is checked whether the input zoom control signal is a speed servo signal or a position servo signal. Normally, the zoom drive is a speed servo, but if both servo control of the speed servo and the position servo can be performed, a signal line (not shown) is separately provided to discriminate between the two modes, and is connected to the photographing lens 1. The discrimination signal is output from the television camera (which may be another means that outputs a signal for switching between speed servo and position servo). Then, based on this determination signal, the CPU 14 determines whether the zoom control signal is a speed servo signal or a position servo signal.
[0040]
Hereinafter, the operation at the time of the speed servo will be described. In step 2, it is determined whether or not the input zoom control signal exceeds a reference value (predetermined value) which is a threshold value for starting the zoom drive (step 5). That is, assuming that the zoom control signal is ZC and the reference zoom control signal (center value) output when the zoom operation unit 11 is not operated is V,
(V−α) ≦ ZC ≦ (V + α)
It is determined whether or not ZC is out of the range. When the zoom control signal ZC is within the above range, the CPU 14 proceeds to step 13 and outputs a signal for stopping the zoom drive to the drive circuit 8. As a result, the zoom drive motor 7 stops, and the zoom position of the photographing lens 1 is maintained.
[0041]
On the other hand, when the zoom control signal ZC is out of the above range (when it exceeds the reference value), the driving direction and the driving signal calculated based on the input zoom control signal are calculated and set (step 6). Next, the routine proceeds to a clutch connection processing subroutine (step 7).
[0042]
The clutch connection processing subroutine will be described with reference to the flowchart of FIG. First, how much connection torque the connection mechanism stage 5 is finally connected to is determined by controlling the zoom control under the condition that the outside air temperature is a predetermined reference temperature (for example, normal temperature) and the inclination angle is horizontal. It is obtained by calculation from the parameter X corresponding to the signal (step 201).
[0043]
Assuming that the reference connection torque minimum value is a, a reference temperature, a horizontal target connection torque Y (hereinafter referred to as a reference target connection torque),
Y0 = a + bX
And
[0044]
The connection mechanism 5 can change the connection torque according to the input connection torque control signal. The connection torque increases as the connection torque control signal increases.
[0045]
The above a is driven by a drive signal (ZC = V + α or ZC = V−α) when the above-mentioned zoom control signal is a reference value, that is, a drive signal calculated from the minimum zoom control signal capable of servo-driving the zoom lens. This is the minimum value of the connection torque that can be driven without idling or stopping.
[0046]
The parameter “b” is a parameter that changes the connection torque in proportion to the drive signal because the zoom speed increases as the drive signal increases and the connection torque slips and idles with only the connection torque based on the minimum connection torque “a”. It is. Further, a and b are also parameters for correcting the torque required for the rotational drive when the lens device is different, which also changes.
[0047]
Here, the value of Y is a value calculated by a linear function, but may be a value calculated by a quadratic function or another function.
[0048]
Next, the air temperature data and the inclination angle data from the temperature detector 15 and the inclination detector 16 are converted into digital signals by the A / D converters 17 and 18 and input to the CPU 14 (step 202). The CPU 14 calculates the target connection torque Y ′ based on the input temperature data temp_data and the inclination angle data incli_data so as to obtain a connection torque corresponding to the temperature data and the inclination angle data. That is, based on the reference temperature and the horizontal state, the amounts of change in the outside air temperature and the inclination angle are calculated, and the parameters a and b are converted.
[0049]
Usually, the torque required to drive the lens device increases as the temperature decreases. Regarding the inclination angle, for example, when the moving lens group is directed downward from the horizontal, the torque required for driving to move the moving lens group downward decreases, and conversely, it is necessary when driving the moving lens group in the lifting direction. Torque increases. The reverse is true when the camera is turned downward. Based on the above, calculate the target connection torque,
Y '= a' + b'X
(Step 203). The torque relationship of Y ′ changes as shown in FIG. 6 depending on the outside air temperature and the inclination angle.
[0050]
That is, the target connection torque Y ′ when the outside air temperature is lower than the reference temperature is higher than the reference target connection torque Y0 as a whole. When the outside air temperature is higher than the reference temperature, the target connection torque Y 'is lower than the reference target connection torque Y0 as a whole.
[0051]
When the moving lens group is driven in the direction opposite to the tilt direction, the target connection torque Y ′ is generally higher than the reference target connection torque Y0, and when the moving lens group is driven in the same direction as the tilt direction, , The target connection torque Y ′ is generally lower than the reference target connection torque Y0.
[0052]
It should be noted that setting the target connection torque Y ′ lower than the reference target connection torque Y0 when the outside air temperature is higher than the reference temperature and when the moving lens group is driven in the same direction as the tilt direction is because the connection torque is more than necessary. This is to reduce the power consumption of the connection mechanism 5 by keeping it from becoming too high.
[0053]
Next, Y ′ (= a ′ + b′X) is input to the connection torque control signal Y (step 204).
[0054]
Then, the connection torque control signal Y is output from the CPU 14, converted into an analog signal by the D / A converter 13, and connected to the connection mechanism 5 via the connection torque control circuit 12 (step 205). If the connection mechanism 5 is an electromagnetic clutch, the applied torque can be changed by changing the applied voltage.
[0055]
When the connection mechanism 5 is connected with the connection torque calculated in this way, the drive direction and drive signal calculated and set in step 6 are then converted into analog signals by the D / A converter 9 in step 8 of the flowchart of FIG. And output to the drive circuit 8 as an analog drive signal. The drive circuit 8 rotationally drives the drive motor 7 based on the signal. The rotation of the drive motor 7 is transmitted to the zoom drive ring 1a via the idler gear 6, and starts servo drive. Then, the process returns to step 2.
[0056]
Next, the case where the input zoom control signal is a position servo signal in step 4 will be described.
[0057]
If the input zoom control signal is a position servo signal in step 2, the position servo signal is the same position signal (arrival position data) as the ZOOM_POS data output by the zoom position detector 2. The control signal is compared with ZOOM_POS, which is the current zoom position, to determine whether or not they are equal (step 9).
[0058]
If they are equal, the process proceeds to step 13 to stop zooming. If they are not equal, the driving direction and the driving signal calculated from the input zoom control signal are calculated and set (step 10). Then, the process proceeds to a clutch connection processing subroutine (step 11). The clutch connection processing subroutine (step 11) is the same as step 7.
[0059]
When the connection mechanism 5 is connected with the connection torque Y calculated in this way, the drive direction and the drive signal calculated and set in step 10 are converted into analog signals by the D / A converter 9 and converted as analog drive signals. Output to the drive circuit 8. The drive circuit 8 rotationally drives the drive motor 7 based on the signal. The rotation of the drive motor 7 is transmitted to the zoom drive ring 1a via the idler gear 6, whereby the zoom drive is started (step 12). Then, the arrival position data calculated from the zoom control signal and ZOOM_POS are compared, and when they are equal, the zoom drive is stopped.
[0060]
Next, processing when the zoom servo drive is stopped will be described. In step 5 of FIG. 3, when the zoom control signal ZC does not exceed the reference value, or when it is determined in step 9 that the zoom control signal is equal to the current zoom position ZOOM_POS, the CPU 14 proceeds to step 13.
[0061]
In step 13, the CPU 14 outputs a zoom drive stop signal. This zoom drive stop signal is D / A converted by the D / A converter 9 and output to the drive circuit 8 as an analog signal. The drive circuit 8 controls the stop of the drive motor 7 based on this signal.
[0062]
Next, a connection torque control signal is output from the CPU 14 so that the connection torque Y becomes 0, and the connection mechanism 5 is brought into a disconnected state (step 14).
[0063]
(2nd Embodiment)
In the first embodiment, the zoom position detector 2 that outputs an analog signal typified by a potentiometer is used. However, the zoom position detector 2 that outputs a pulse typified by a rotary encoder may be used.
[0064]
(Third embodiment)
Further, in the first embodiment, the case where the connection torque of the connection mechanism is changed based on both the outside air temperature and the inclination angle is described. However, the connection torque is changed based on only one of the outside air temperature and the inclination angle. It may be changed.
[0065]
(Fourth embodiment)
In the first embodiment, the connection torque is obtained by calculation, but the connection torque may be obtained from table data stored in a memory in advance.
[0066]
(Fifth embodiment)
Although the first embodiment has been described with respect to driving a zoom lens, the present invention can also be applied to driving other optical adjustment means such as a focus lens and a diaphragm.
[0067]
(Sixth embodiment)
Further, in the first embodiment, the lens drive unit including the servo drive system, which is mounted on the taking lens, has been described. However, in the present invention, the taking lens and the servo drive system are housed in one housing, and the demand The present invention can also be applied to a large photographing lens device (optical device) to which a servo operation unit such as the above can be connected.
[0068]
【The invention's effect】
As described above, according to the present invention, the connection torque in the connection means not only corresponds to the output of the servo drive system according to the control signal from the operation unit or the operation unit, but also the external air temperature and device at that time. It is set based on the operating conditions such as the inclination of the lens, so that the servo driving of the optical adjustment means can be reliably performed even under various operating conditions, and the servo driving and the manual driving can be performed without performing the manual switching operation. It can be performed.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a lens system according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing an electric circuit of the lens system.
FIG. 3 is a flowchart showing an operation of a lens drive unit constituting the lens system.
FIG. 4 is a flowchart showing the operation of the lens drive unit.
FIG. 5 is a flowchart showing the operation of the lens drive unit.
FIG. 6 is a graph showing a relationship between a connection torque of a connection mechanism and a drive signal in the lens drive unit.
FIG. 7 is a configuration diagram of a conventional lens system.
[Explanation of symbols]
1 ... photographic lens
1a ... Zoom drive ring
2. Zoom position detector
3. Idler gear
4: A / D converter
5. Connection mechanism
6 ... Idler gear
7 Drive motor
8. Drive circuit
9 D / A converter
10 A / D converter
11 Zoom operation unit
12 Connection torque control circuit
13 ... D / A converter
14 ... CPU
15 ... Temperature detector
16 ... Tilt detector
17 ... A / D converter
18 ... A / D converter

Claims (8)

A lens and other optical adjustment means, a servo drive system for generating a driving force for driving the optical adjustment means, and a connection means for connecting the servo drive system to the optical adjustment means so as to transmit a driving force. It is possible to connect a servo operation unit that outputs a control signal for driving the servo drive system in accordance with an operation of an operation member, and to vary a connection torque between an input side and an output side of the connection unit. Optical device,
Temperature detection means for detecting an outside air temperature;
Inclination detection means for detecting an inclination of the optical device from a horizontal state,
A control unit for changing a connection torque of the connection unit based on a control signal from the servo operation unit and at least one of an output of the temperature detection unit and an output of the inclination detection unit. Optical device. A drive transmission member that transmits the driving force of the servo drive system transmitted through the connection mechanism to the optical adjustment unit and that is operated to manually drive the optical adjustment unit. Item 2. The optical device according to item 1. When a control signal exceeding a predetermined value is input from the servo operation unit, the control unit connects the connection mechanism to the control signal and at least one of an output of the temperature detection unit and an output of the inclination detection unit. Connect with the connection torque determined based on
The optical device according to claim 2, wherein when no control signal exceeding the predetermined value is input from the servo operation unit, the connection mechanism is disconnected. A servo drive system that generates a driving force for driving the optical adjustment means, and a servo drive system that generates a driving force for driving the optical adjustment means; A servo operation unit that outputs a control signal for driving the system, and a connection unit that connects the servo drive system to the optical adjustment unit so as to transmit a driving force, and an input side and an output side of the connection unit. An optical device drive unit having a variable connection torque between
Temperature detection means for detecting an outside air temperature;
Inclination detection means for detecting an inclination of the optical device from a horizontal state,
An optical system comprising: a control unit that changes a connection torque of the connection unit based on a control signal from the servo operation unit and at least one of an output of the temperature detection unit and an output of the inclination detection unit. Device drive unit. The control unit, when a control signal exceeding a predetermined value is input from the servo operation unit, the connection mechanism to the control signal and at least one of the output of the temperature detection unit and the output of the inclination detection unit Connect with the connection torque determined based on
5. The optical device drive unit according to claim 4, wherein when no control signal exceeding the predetermined value is input from the servo operation unit, the connection mechanism is disconnected. 6. A camera system comprising: the optical device according to claim 1; and a camera to which the optical device is attached. An optical device system comprising: the optical device drive unit according to claim 4 or 5; and an optical device to which the drive unit is attached. A camera system, comprising: the optical device system according to claim 7; and a camera to which the optical device is attached.

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