JP2007171278A - Lens device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide operability suitable to operate only a lens device or suitable to operate both the lens device and an operation base on which the lens device is placed. <P>SOLUTION: A state is judged by a detecting means that detects the movement of the operation base. According to the state, a method for driving the lens is altered or the drive of the lens is stopped. In order to alter the drive, nonsensitive area of the operation bar of an operating part, a speed curve, or an operating force is altered. In addition, the drive of the lens operated by the operating part is arbitrarily stopped with the stop switch of the operating part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lens device used for television photography.

  2. Description of the Related Art Conventionally, a lens apparatus that operates lens driving such as zoom operation of a TV lens mounted on a TV camera includes a thumb ring as a zoom operation means and an encoder that outputs an electrical signal proportional to the tilt angle of the thumb ring. It has a detection means and a control device for driving and controlling the zoom lens using an electric signal from the detection means as a speed command signal. Then, the cameraman uses a speed control system in which the zoom lens moves slowly when the thumb ring is tilted slightly while looking at the monitor, and the zoom lens moves faster when the thumb ring is tilted greatly. Accordingly, when the movement of the thumb ring is stopped at a desired position while checking the angle of view that changes according to the zoom operation on the monitor, the movement of the zoom lens is stopped at that position.

  On the other hand, the focus lens of the television lens is driven with the same configuration as the zoom operation. That is, an operation knob as a focus operation means, a detection means including an encoder that outputs an electric signal proportional to the rotation angle of the operation knob, and a focus lens drive control using the electric signal from the detection means as a speed command signal And a control device.

  FIG. 14 is a schematic diagram showing a conventional configuration of a television camera, a lens device, and an operation console.

  The lens apparatus 100 is mounted on the stage 4 on which the operation table 300 is movable together with the TV camera 200 via the fixed supporter 5. On both sides of the stage 4, pan rods 6 and 7 for a cameraman to perform pan and tilt operations are provided, and a zoom operation unit 400 that operates the zoom lens of the lens device 100 in the vicinity of the tip of each pan rod, and A focus operation unit 500 for operating the focus lens is fixed. When the cameraman operates the zoom operation unit 400 or the focus operation unit 500, each command signal is transmitted to the CPU 3 included in the lens device 100, and the CPU 3 drives and controls each lens according to the operation amount. At this time, the cameraman adjusts the operation amount while confirming the desired change in the angle of view and the in-focus state on the monitor 8 provided in the television camera 200.

  A rotatable roller 9 is provided on the bottom surface of the operation table 300, and the operation table 300 can be freely moved on the floor surface. Further, the support column 10 of the operation table 300 can be moved up and down even when a load is applied from the upper surface stage 4 by air pressure or an elastic force such as a spring, and further, the stage 4 is inclined with respect to the support column 10 in the pan and tilt directions. Can be changed. With such a mechanism, the cameraman can move the lens apparatus 100 and the TV camera 200 in the pan, tilt, up and down, and horizontal directions, and can shoot from various viewpoints on the shooting target.

  FIG. 15 is a cross-sectional view showing an internal configuration of the zoom operation unit 400 described above.

  In the zoom operation unit 400, an operation rod (hereinafter referred to as a thumb ring) operated with a thumb is supported rotatably with respect to the grip 58 with the central axis O as a rotation center, and via the thumb ring 22 and the connecting member 35. A rotary encoder 37 capable of detecting a rotation angle and a rotation direction at the time of operation is attached to an end portion of the rotating shaft 36 that is connected and similarly rotatably supported. The output signal of the rotary encoder 37 is proportional to the operation rotation angle of the thumb ring 22, and when the cameraman rotates the thumb ring 22, the zoom operation calculation unit 38 converts the output signal into a zoom operation signal 11 to the lens device 100 side and the lens device 100. To the CPU 3 on the side. Although FIG. 15 illustrates the procedure for transmitting the operation signal of the zoom operation unit 400, the focus operation unit 500 also rotates the operation rod, the output of the rotary encoder, the conversion in the operation calculation unit, and the CPU of the operation signal (not shown). Transmission is performed in the same procedure of transmission to the network.

  The connecting member 35 is provided with an inclined cam 39 having a surface inclined with respect to the central axis O on the right side in the drawing. The roller 40 is a cam roller that slides on the inclined surface of the inclined cam 39, and moves linearly in the direction of the central axis O together with the moving plate 41 connected to the roller 40. The moving plate 41 has a pin 42 that slides in the groove on the inner wall of the grip 58. The knob 62 is rotatable about a central axis O, and a rotary shaft 63 connected to the knob 62 is screwed to the grip 58 side. When the knob 62 is rotated, the end of the rotary shaft 63 on the left side in the figure It moves linearly in the direction of the central axis while rotating together with the adjustment plate 44 connected to the. The adjustment plate 44 and the rotary shaft 63 are rotatably connected, and the adjustment plate 44 has a pin 45 that slides in the groove on the inner wall of the grip 58. Move in a straight line only in the direction. A compression spring 51 is interposed between the moving plate 41 and the adjusting plate 44 while receiving the force from both. Therefore, the roller 40 always generates a force that pushes the inclined surface of the inclined cam 39 to the left side in the figure. When the thumb ring 22 is not operated, the thumb ring 22 is rotated to the rotation side with the roller 40 most moved to the left side in the figure. It has stopped. With this state as the initial position of the zoom operation, the cameraman performs the zoom operation by rotating the thumb ring 22 while receiving the reaction force of the compression spring 51. When the photographer turns the knob 62, the adjustment plate 44 moves in the direction of the central axis O via the rotating shaft 63 that is screwed together. Then, the elastic force of the compression spring 51 changes according to the distance moved, and the force with which the roller 40 pushes the inclined cam 39 via the moving plate 41 also changes. At the same time, since the rotational torque of the thumb ring 22 also changes, the cameraman can change the operating force according to the shooting situation and preference.

  The zoom operation unit 400 has other functions related to photographing. For example, the toggle switch 59 is a switch for switching the type of the focal length conversion optical system that can be inserted into and removed from the optical axis of the photographing optical system of the lens apparatus, as disclosed in JP-A-2002-049068, and an output signal indicating the state of the switch Is transmitted to the CPU 3 via the zoom operation calculation unit 38. The toggle switch 59 allows the cameraman to switch with which zoom lens the shooting is performed according to the shooting. Further, in the case of having an image blur correction optical system as disclosed in JP-A-2002-049068, it may be used as a switch for switching between a state in which correction by the correction optical system is activated or a non-operation. good.

  In addition, the button switch 60 is a switch that allows other cameramen to check on the monitor the video that is being captured by the other lens apparatus and the TV camera. When the button is pressed, a command signal is transmitted to the TV camera 200 via the zoom operation calculation unit 38 and the CPU 3, and the monitor output is switched and displayed if the TV camera can acquire the video signal output of another TV camera. The

  FIG. 16 is a configuration diagram showing the configuration in the lens apparatus 100. As shown in FIG.

  The zoom operation signal 11 is a command signal from the zoom operation unit 400 in FIG. 15, and the focus operation signal 12 is a focus operation signal from the focus operation unit 500. These signals are communicated with the CPU 3. One of the outputs of the CPU 3 is sequentially connected to an amplifier 13 and a motor 14 to drive a lens 15 (zoom unit) having a zooming function as a driven member. The output of the position detector 16 for detecting the position of the lens is fed back to the CPU 3.

  The other output of the CPU 3 is sequentially connected to an amplifier 17 and a motor 18 to drive a focusing lens 19 having a focusing function as a driven member. Similarly, the output of the position detector 20 that detects the position of the focusing lens 19 is also fed back to the CPU 3.

  The memory 21 is a memory that stores in advance the driving characteristics of how to drive the lens in response to a command signal from the operation unit, and the CPU 3 performs lens driving based on the characteristic values stored in the memory 21. For example, in zooming, the lens moving speed with respect to the operation rotation angle of the thumb ring 22 in FIG. 15 is changed on the wide angle side and the telephoto side of the focal length.

  When the cameraman operates the thumb ring 22 of the zoom operation unit 400 to adjust the focal length, the zoom operation signal 11 changes according to the operation rotation angle. Similarly, when an operation rod (not shown) of the focus operation unit 500 is operated to adjust the object distance, the focus operation signal 12 changes according to the operation amount. Based on the changed zoom operation signal 11 and the output value of the position detector 16, the CPU 3 drives the lens 15 by a predetermined amount by the motor 14 via the amplifier 13 based on the characteristic data in the memory 21. Similarly, the CPU 3 drives the lens 19 by a predetermined amount by the motor 18 via the amplifier 17 based on the characteristic data in the memory 21 based on the changed focus operation signal 12 and the output value of the position detector 20.

By such a procedure, shooting is performed with a change in the angle of view or in-focus state intended by the cameraman.
Kaihei 10-282396 JP 2002-49068 A

  However, the above-described conventional example has the following problems.

  In a studio that shoots television or a stadium that broadcasts sports, it is common to shoot a plurality of combinations of lens devices and television cameras in order to obtain subject images from various viewpoints. In addition, even with individual combinations, panning and tilting operations are performed on the operation console to improve the realistic sensation of the site in song programs and sports, rather than always taking images of frames fixed from a fixed position as in news programs. There are cases where the subject is taken or moved from another position by moving the operation console. At this time, there is a case where the lens operation is not performed during operation of the operation table, a case where panning is performed while zooming is performed, and a case where the operation table is moved is also photographed in parallel. In this way, when shooting not only the lens operation but also the operation console at the same time, it is necessary to operate the lens with the zoom operation unit and focus operation unit in FIG. 14 and simultaneously perform the pan operation and tilt operation with the pan bar. .

  By the way, it is desirable for a cameraman to obtain an intended image by driving the lens with good follow-up according to the operation amount in the zoom operation unit or the focus operation unit. Therefore, the thumb ring of the zoom operation unit and the operation rod of the focus operation unit are set to be highly sensitive so as to respond to the delicate hand movements of the photographer.

  However, the operation of the lens, which requires high accuracy, and the operation of the operation console that moves the lens device and the TV camera are completely different, and the thumb ring and control rod move unintentionally during operation of the operation console. There is a risk of shooting accidents. In addition, if they are operated simultaneously, the operation of the lens becomes complicated and the sensitivity of the operation unit is high, so that it is difficult to perform shooting in conjunction with the movement of the operation console. In addition, the functions other than the lens operation described above are densely arranged in the operation section close to the operation rod so that they can be easily operated during shooting. There is also a risk of getting up.

  In order to solve the above problem, a lens apparatus according to claim 1 of the present invention comprises a zoom optical system, a focus optical system, respective driving means and operation means, and the lens apparatus and the photographing optical system of the lens apparatus. An operation detecting means for detecting an operation state of a pan operation, a tilt operation, an up / down operation, or a movement of the operation table on which the camera device for outputting the video signal of the image obtained in the above is placed; It is characterized by having lens operation control means for controlling the operation of the lens of the lens apparatus in response to the command signal.

  Further, in the lens device according to claim 2 of the present invention, the operation control unit described above stops the lens operation by the command signal of the zoom operation unit or the focus operation unit in accordance with the command signal from the operation detection unit. Features.

  Further, in the lens apparatus according to claim 3 of the present invention, the above-described operation control unit is operated until the lens starts moving from the stop state according to the command signal from the zoom operation unit or the focus operation unit according to the command signal from the operation detection unit. It is characterized by changing the area of the dead zone.

  Further, in the lens device according to claim 4 of the present invention, the motion control unit described above changes the follow-up performance of the lens operation with respect to the command signal of the zoom operation unit or the focus operation unit in accordance with the command signal from the motion detection unit. It is characterized by doing.

  In the lens device according to claim 5 of the present invention, the zoom operation unit or the focus operation unit includes an operation force change unit that changes the operation force, and the lens operation control unit receives a command signal from the operation detection unit. According to this, the operation force of the zoom operation means or the focus operation means is changed.

  According to a sixth aspect of the present invention, there is provided a lens apparatus for detecting an image blur of an image formed by a photographing optical system, and correcting the image blur according to a command signal from the image blur detection unit. An image blur correction unit is provided, and a command signal from the image blur detection unit is used as a command signal of the above-described motion detection unit.

  In the lens device according to claim 7 of the present invention, the zoom operation means or the focus operation means is provided with a stop switch for stopping at least one lens operation, and the zoom operation means or the focus according to the stop switch command signal. It has a lens operation control means which stops the lens operation by the command signal of the operation means.

  The lens device according to claim 8 of the present invention includes both the above-described motion detection means and the above-described stop switch, and the lens motion based on the command signal from the motion detection means is the lens motion based on the command signal from the motion detection means. It has a lens operation control means for operating it with higher priority.

  Further, in the lens device according to claim 9 of the present invention, the zoom operation means or the focus operation means includes a function switch of a TV camera other than the lens operation, and the lens operation control means is an operation detection means or a stop switch command. The operation of the function by the function switch is stopped according to the signal.

  A lens apparatus according to claim 10 of the present invention is characterized by comprising display means for displaying the state of the lens operation or the state of the functional operation changed by the lens operation control means.

  As described above, in the embodiment according to claim 1 of the present invention, the movement of the operating table on which the lens device and the TV camera are mounted can be detected, and the lens driving method can be changed according to the state. . Therefore, the cameraman can operate the lens suitable for each state.

  In the embodiment according to claim 2, since the lens operation is stopped by detecting the movement of the operation table, it is possible to prevent a malfunction that erroneously moves the operation rod of the operation unit during the operation of the operation table.

  In the embodiment according to claim 3, since the dead zone area of the operation panel of the operation unit is changed by detecting the movement of the operation table, even if the operation panel of the operation unit is mistakenly moved during the operation of the operation table, the malfunction is caused more than usual. The probability of occurrence of can be lowered.

  In the embodiment according to claim 4, since the speed curve of the lens is changed by detecting the movement of the operation table, the operability suitable for both shooting with driving the lens while operating the operation table and shooting only with lens driving is provided. This can reduce the burden on the photographer.

  In the embodiment according to claim 5, since the operation rotational torque of the operation unit is changed by detecting the movement of the operation table, the shooting of driving the lens while operating the operation table is the same as the effect of claim 4, and only the lens drive is performed. Operability suitable for both shootings can be obtained, and the burden on the photographer can be reduced.

  In the embodiment according to the sixth aspect, it is possible to detect the movement of the operation table using the image blur detecting means in the lens apparatus having the image blur correcting optical system.

  In the embodiment according to claim 7, since a switch for stopping the lens drive is provided in the operation unit, when operating the operation table, or when it is desired to maintain the state of the angle of view and the focal length during photographing, This is effective when you want to operate it yourself.

  In the embodiment according to claim 8, in order to prioritize the operation of the switch for stopping the lens driving over the lens driving based on the movement detection of the operation table, in addition to the function of the lens device to independently determine and change the driving method, Can judge and use them according to the situation.

  In the embodiment according to claim 9, not only the lens drive change by detecting the movement of the operation table, but also the operation of the switches of other functions provided in the operation unit can be stopped.

  In the embodiment according to claim 10, since a display lamp for changing the lens drive is provided in the vicinity of the monitor of the TV camera, the cameraman can always grasp the state of the lens device while looking at the monitor, and even if the lens drive method is switched, Focus on shooting while recognizing.

Example 1
A detailed description of the claims of the present invention will be given below on the basis of the illustrated embodiment.

  FIG. 1 is a schematic diagram showing the configuration of a lens device, a television camera, and an operation table according to the claims of the present invention. The same parts as those described above are denoted by the same reference numerals.

  The difference from the conventional configuration of FIG. 14 is that the lens apparatus 100 newly includes an acceleration sensor 1 and an evaluation calculation processing unit 2 that evaluates an output value of the acceleration sensor 1. The acceleration sensor 1 can detect movements in three directions of two horizontal directions (X, Y) and vertical direction (Z), and the panning or tilting operation of the operation console 300 is performed on the lens device 100 and the TV camera 200, or When rotation or movement acceleration occurs due to movement of the operation console 300 itself, detection according to the direction is performed. The evaluation calculation processing unit 2 monitors the output signal from the acceleration sensor 1 and transmits it to the CPU 3 when the output signal exceeds a predetermined threshold value.

  Similarly to FIG. 14, the lens apparatus 100 is mounted on the stage 4 on which the operation table 300 is movable together with the TV camera 200 via the fixed supporter 5. On both sides of the stage 4, pan rods 6 and 7 for a cameraman to perform pan and tilt operations are provided, a zoom operation unit 400 that operates the zoom lens of the lens device 100 in the vicinity of the tip of each pan rod, and A focus operation unit 500 for operating the focus lens is fixed. When the cameraman operates the zoom operation unit 400 or the focus operation unit 500, each command signal is transmitted to the CPU 3 included in the lens device 100, and the CPU 3 drives and controls each lens according to the operation amount. At this time, the cameraman adjusts the operation amount while confirming the desired change in the angle of view and the in-focus state on the monitor 8 provided in the television camera 200.

  In addition, a rotatable roller 9 is provided on the bottom surface of the operation table 300, and the operation table 300 can be freely moved on the floor surface. Further, the support column 10 of the operation table 300 can be moved up and down even when a load is applied from the upper surface stage 4 by air pressure or an elastic force such as a spring, and further, the stage 4 is inclined with respect to the support column 10 in the pan and tilt directions. Can be changed. With such a mechanism, the cameraman can move the lens apparatus 100 and the TV camera 200 in the pan, tilt, up and down, and horizontal directions, and can shoot from various viewpoints on the shooting target.

  FIG. 2 is a configuration diagram showing the configuration in the lens apparatus 100. As shown in FIG. The same parts as those described above are denoted by the same reference numerals.

  The difference from the conventional configuration of FIG. 16 is that an acceleration sensor 1 and an evaluation calculation processing unit 2 are newly added to the configuration. The zoom operation signal 11 is a command signal from the zoom operation unit 400, and the focus operation signal 12 is a focus operation signal from the focus operation unit 500. These signals are communicated with the CPU 3. One of the outputs of the CPU 3 is sequentially connected to an amplifier 13 and a motor 14 to drive a lens 15 (zoom unit) having a zooming function as a driven member. The output of the position detector 16 for detecting the position of the lens 15 is fed back to the CPU 3.

  The other output of the CPU 3 is sequentially connected to an amplifier 17 and a motor 18 to drive a focusing lens 19 having a focusing function as a driven member. Similarly, the output of the position detector 20 that detects the position of the focusing lens 19 is also fed back to the CPU 3.

  The memory 21 is a memory that stores in advance the driving characteristics of how to drive the lens in response to the command signals from the respective operation units described above, and the CPU 3 uses the characteristic values stored in the memory 21 to store the lens. Drive.

  Next, the operation will be described.

  When the photographer operates the thumb ring 22 of the zoom operation unit 400 in FIG. 15 to adjust the focal length, the zoom operation signal 11 changes according to the operation rotation angle. Similarly, when an operation rod (not shown) of the focus operation unit 500 is operated to adjust the object distance, the focus operation signal 12 changes according to the operation amount. Based on the changed zoom operation signal 11 and the output value of the position detector 16, the CPU 3 drives the lens 15 by a predetermined amount by the motor 14 via the amplifier 13 based on the characteristic data in the memory 21. Similarly, the CPU 3 drives the lens 19 by a predetermined amount by the motor 18 via the amplifier 17 based on the characteristic data in the memory 21 based on the changed focus operation signal 12 and the output value of the position detector 20.

  When the photographer performs pan / tilt operations or changes the camera position in order to change the object to be photographed, the operation console 300 is operated. In the case of pan / tilt operation, the pan bar 6 or pan bar 7 is operated to change the direction of the stage 4 with respect to the column 10 to change the shooting angles of the lens apparatus 100 and the TV camera 200. When the shooting position is moved up and down, the grip 23 provided on the column 10 is operated to move the column 10 up and down. When the operation table 300 itself is moved horizontally, the grip 24 provided on the operation table 300 is operated to move.

  At this time, when the cameraman performs operations such as pan, tilt, up / down, and horizontal movement on the operation table 300, the output value of the acceleration sensor 1 provided in the lens device 100 changes according to the moving direction.

  FIG. 3 is a graph showing the state of the output value of the acceleration sensor 1.

  FIG. 3A shows a state where the operation console 300 is not operated. At this time, the output waveform 25 of the acceleration sensor 1 shows a substantially uniform voltage value (vertical axis) on the time axis (horizontal axis) excluding the output voltage of the high frequency component of noise originally possessed by the acceleration sensor 1. . The broken line voltage value 26 is a threshold value of the evaluation calculation processing unit 2, and in FIG. 3A, the output waveform 25 does not exceed the voltage value 26. Therefore, the evaluation calculation processing unit 2 has a low output value of the acceleration sensor 1, that is, It is determined that the operation console 300 is not operated and is not transmitted to the CPU 3. FIG. 3B shows a state in which the operation console 300 is operated and the acceleration sensor 1 reacts accordingly. In FIG. 3B, the output waveform 27 of the acceleration sensor 1 exceeds the threshold voltage value 26 that temporarily becomes the determination criterion of the evaluation calculation processing unit 2 due to the operation of the operation console 300. The evaluation calculation processing unit 2 notifies the CPU 3 that the threshold value has been exceeded. At this time, even if the CPU 3 receives a command signal from the zoom operation signal 11 or the focus operation signal 12, it does not drive the lens with the conventional characteristic value recorded in the memory 21, and the drive described in each claim. The lens is driven with the characteristic value according to the method.

  With this operation, the lens apparatus 100 determines whether the operation console 300 is in a stopped state or an operated state, and enables lens driving suitable for each state. For example, in the lens device according to claim 2, when the operation table 300 is operated and the output value of the acceleration sensor 1 exceeds the threshold value of the evaluation calculation processing unit 2, the CPU 3 detects whether the zoom operation signal 11 or the focus operation signal 12 Even when the command signal is received, the lens is not driven. Accordingly, even if the thumb ring 22 of the zoom operation unit 400 or the operation lever of the focus operation unit 500 is moved unintentionally during the operation of the operation console 300, the lens is not driven, and an accident due to a malfunction can be prevented.

  FIG. 4 is a schematic diagram showing another configuration of the lens device, the television camera, and the operation table according to the claims of the present invention. The same parts as those described above are denoted by the same reference numerals.

  The difference from the configuration of FIG. 1 is that, in addition to the acceleration sensor 1, piezoelectric sensors 28 and 29 are added to the grips 23 and 24, respectively. The piezoelectric sensors 28 and 29 are provided at positions where the cameraman grips the grips when operating the operation table 300 by operating the grips 23 and 24. When the photographer grips the grip 23 or 24, the piezoelectric sensor 28 or 29 detects the grip force. Although a piezoelectric sensor is used here for detection, an electrostatic sensor that detects a human electrostatic voltage may be used as another similar sensor.

  FIG. 5 is a configuration diagram showing the configuration in the lens device 100 of FIG. The same parts as those described above are denoted by the same reference numerals.

  The difference from the configuration of FIG. 2 is that the piezoelectric sensors 28 and 29 are newly configured as in FIG.

  When the photographer holds the grip 23 and performs an operation of moving the support column 10 of the operation table 300 up and down, the piezoelectric sensor 28 provided on the grip 23 detects the gripping force and transmits it to the CPU 3. Even if the CPU 3 receives a command signal from the zoom operation signal 11 or the focus operation signal 12 as described above, the CPU 3 does not drive the lens with the conventional characteristic value recorded in the memory 21. The lens is driven with the characteristic value. By this operation, the lens apparatus 100 determines whether the operation console 300 is in a stopped state or an operated state, and enables lens driving different from the normal state. The same operation is possible even when the cameraman grips the grip 24 to move the operation table 300 and the piezoelectric sensor 29 provided on the grip 24 detects the gripping force.

  4 and 5, since the acceleration sensor 1 and the piezoelectric sensors 28 and 29 are used in combination for detecting the state of the operation console 300, the outputs from both are connected by an OR circuit (not shown) and transmitted to the CPU 3. Thus, the operation state of the operation console 300 can be grasped with higher accuracy.

  The graph of FIG. 6 is a graph showing the operation according to the third aspect.

  In FIG. 6, the horizontal axis represents the operation rotation angle of the thumb ring 22 of the zoom operation unit 400, and the vertical axis represents the moving speed of the lens corresponding to the operation rotation angle. The broken line is the lens speed change 30 according to the zoom operation signal 11 at the operation rotation angle of the thumb ring 22 in normal operation, and the speed change from θ1 to the maximum operation angle θmax through the dead zone from the operation rotation angle 0 to θ1. . This dead zone is provided for the purpose of absorbing backlash due to manufacturing errors in the rotational stop state of the thumb ring 22 and that feedback control is performed to improve the operational feeling when the lens is driven by the CPU 3. ing.

  A solid line in FIG. 6 represents a speed change 31 when the operation console 300 is operated according to the output of the acceleration sensor 1 or the piezoelectric sensors 28 and 29 described above. The speed change 31 is set such that the rotation angle of the dead zone is 0 to θ2, and is longer than 0 to θ1 of the speed change 30. When the CPU 3 recognizes that the operation console 300 is operating from each sensor output, the CPU 3 drives the lens with the speed change 31 of the solid line. The speed change 31 is a longer dead zone than the normal speed change 30, and if the thumb ring 22 is accidentally touched during operation of the operation table 300, there is a risk that the lens will be driven unintentionally than usual. Can be avoided.

  Although the zoom operation has been described above, the same operation can be performed for the focus operation.

  The graph of FIG. 7 is a graph showing the operation according to the fourth aspect.

  In FIG. 7, the horizontal axis represents the operation rotation angle of the thumb ring 22 of the zoom operation unit 400, and the vertical axis represents the moving speed of the lens corresponding to the operation rotation angle. The broken line is the lens speed change 32 according to the zoom operation signal 11 at the operation rotation angle of the thumb ring 22 in the normal operation, and after passing through the dead zone from the operation rotation angle 0 to θ1 as in FIG. The speed changes up to θmax.

  A solid line in FIG. 7 represents a speed change 33 when the operation console 300 is operated according to the output of the acceleration sensor 1 or the piezoelectric sensors 28 and 29 described above. The speed change 33 is different from the normal speed change 32 in the curve from θ1 to the maximum rotation angle, and the speed rise is set to be moderate to the speed change 32 halfway. When the operation table 300 recognizes that the operation is being performed by the respective sensor outputs, the CPU 3 drives the lens with the speed change 33 indicated by the solid line. The speed change 33 can be less affected by the malfunction than normal even if the lens is driven by accidentally touching the thumb ring 22 during the operation of the operation table 300 by the speed curve set to be slower than the normal speed change 32. In addition, in the speed curve set gently, the amount of lens movement is small with respect to the operation rotation angle of the thumb ring 22, so in the shooting that drives the lens while operating the operation table 300, the two operations with different force application methods The difference in accuracy can be reduced and the burden on the photographer can be reduced.

  Although the zoom operation has been described above, the same operation can be performed for the focus operation.

  FIG. 8 is a cross-sectional view showing an internal configuration of the zoom operation unit according to the lens apparatus of claim 5. The same parts as those described above are denoted by the same reference numerals.

  The difference from the configuration of FIG. 15 is that the rotational torque adjustment of the thumb ring has been changed to motor drive. In the zoom operation unit 600, the thumb ring 22 is rotatably supported with respect to the grip 34 with the central axis O as the center of rotation, and is connected to the thumb ring 22 via the connecting member 35 and is also rotatably supported. A rotary encoder 37 capable of detecting a rotation angle and a rotation direction at the time of operation is attached to the end of the rotation shaft 36. The output signal of the rotary encoder 37 is proportional to the operation rotation angle of the thumb ring 22, and when the cameraman rotates the thumb ring 22, the zoom operation calculation unit 38 converts the output signal into a zoom operation signal 11 to the lens device 100 side and the lens device 100. To the CPU 3 on the side.

  The connecting member 35 is provided with an inclined cam 39 having a surface inclined with respect to the central axis O on the right side in the drawing. The roller 40 is a cam roller that slides on the inclined surface of the inclined cam 39, and moves linearly in the direction of the central axis O together with the moving plate 41 connected to the roller 40. The moving plate 41 has a pin 42 that slides in the groove on the inner wall of the grip 34.

  A rotation shaft 43 that can rotate about the center axis O as a rotation center is screwed and coupled to the grip 34 side, and rotates with the adjustment plate 44 connected to the end of the rotation shaft 43 on the left side in the figure. Move straight in the O direction. The adjustment plate 44 and the rotation shaft 43 are rotatably connected. Since the adjustment plate 44 has a pin 45 that slides in the groove on the inner wall of the grip 34, the rotation is regulated by the pin 45 and the groove, and the central axis Move linearly only in the O direction. The rotating shaft 43 is screwed and coupled to the motor 46 via gears 47 and 48, and rotates when the motor 46 is driven. The gear 47 is connected to the rotary shaft 43 so as to be slidable in a linear direction through a pin 49 that slides in a groove provided in the rotary shaft 43 because the rotary shaft 43 linearly moves in the direction of the central axis O. Has been. The gear 47 rotates together with the rotation shaft 43 via the pin 49, but when the rotation shaft 43 moves in the linear direction, movement in the linear direction is restricted by a regulating member (not shown). A rotary encoder 50 is coaxially engaged with the motor 46 and monitors the rotational speed and rotational direction when the motor 46 is driven. Further, the motor 46 and the rotary encoder 50 drive the rotating shaft 43 in the instructed rotation speed and rotation direction in response to a command signal from the CPU 3.

  A compression spring 51 is interposed between the moving plate 41 and the adjusting plate 44 while receiving the force from both. Therefore, the roller 40 always generates a force that pushes the inclined surface of the inclined cam 39 to the left side in the figure. When the thumb ring 22 is not operated, the thumb ring 22 is rotated to the rotation side with the roller 40 most moved to the left side in the figure. It has stopped. With this state as the initial position of the zoom operation, the cameraman performs the zoom operation by rotating the thumb ring 22 while receiving the reaction force of the compression spring.

  Next, the operation will be described.

  When the photographer does not operate the console 300, the CPU 3 drives the lens with a zoom operation signal corresponding to the rotation angle of the thumb ring 22. At this time, the rotating shaft 43 and the adjusting plate 44 are locked at a predetermined position, and the motor 50 screwed and coupled with the gears 47 and 48 is also locked. The compression spring 51 rotationally locks the thumb ring 22 via the roller 40 and the inclined cam 39 by the elastic force between the position where the adjustment plate 44 is locked and the moving plate 41. At this time, since the adjusting plate 44 is locked to the right side in the drawing within the range of linear movement, the rotational torque of the thumb ring 22 is relatively weak, and the cameraman can operate with a light operating force.

  When the operation table 300 is operated, the CPU 3 receives the acceleration 1 or the output from the piezoelectric sensors 28 and 29 and sends a command for changing the rotational torque of the thumb ring 22 to the zoom operation calculation unit 38. The zoom operation calculation unit 38 receives the command, drives the motor 46 while monitoring with the rotary encoder 50, and moves the rotary shaft 43 and the adjustment plate 44 to predetermined positions via the gears 48 and 47. The elastic force of the compression spring 51 changes according to the distance moved, and the force with which the roller 40 pushes the inclined cam 39 via the moving plate 41 also changes. The moving position is on the left side in the figure with respect to the above-described locking position, and therefore the rotational torque of the thumb ring 22 is relatively strong and the operating force is heavy.

  The graph of FIG. 9 is a graph showing the state of the above-described operating force.

  In FIG. 9, the horizontal axis represents the operation rotation angle of the thumb ring 22 of the zoom operation unit 600, and the vertical axis represents the rotation torque corresponding to the operation rotation angle. The broken line is a torque curve 52 corresponding to the operating rotation angle of the thumb ring 22 in normal operation, and the solid line is the torque curve 53 when the operating force of the thumb ring 22 is changed. When the operation table 300 recognizes that the operation table 300 is operating from the respective sensor outputs, the rotational torque of the thumb ring 22 is changed and the operation force becomes heavier as shown in FIG. If the thumb ring 22 is accidentally touched and the lens is driven, the influence of malfunction can be reduced than usual.

  In addition, when the rotational torque becomes heavy, the difference in operating force between two operations with different methods of applying force can be reduced in photographing where the lens is driven while operating the operation console 300, and the burden on the photographer can be reduced.

  Although the zoom operation has been described above, the same operation as described above is possible for the focus operation if the same mechanism is used for the operation rod.

  The graph of FIG. 10 is a graph showing the operation according to the sixth aspect.

  The solid line waveforms in FIGS. 10A and 10B are output waveforms from the angular velocity sensor (not shown) of the image blur correction optical system (not shown). FIG. 10A shows a state where the operation console 300 is not operated. At this time, the output waveform 54 of the angular velocity sensor indicates the amplitude waveform of vibration due to image blur that the angular velocity sensor is responding to. The broken line voltage value 55 is the threshold value of the evaluation calculation processing unit 2, and in FIG. 10A, the output waveform 54 does not exceed the voltage value 55. Therefore, the evaluation calculation processing unit 2 has a low output value of the angular velocity sensor. It is determined that the base 300 is not operated, and is not transmitted to the CPU 3. FIG. 10B shows a state in which the operating table 300 is operated and the angular velocity sensor responds accordingly. In FIG. 10B, the output waveform 56 of the angular velocity sensor causes an angular displacement that is much larger than the output due to the vibration amplitude due to the operation of the operation table 300, and a threshold voltage value that is a determination criterion of the evaluation calculation processing unit 2. Over 55. The evaluation calculation processing unit 2 notifies the CPU 3 that the threshold value has been exceeded. At this time, even if the CPU 3 receives a command signal from the zoom operation signal 11 or the focus operation signal 12, it does not drive the lens with the conventional characteristic value recorded in the memory 21, and the drive described in each claim. The lens is driven with the characteristic value according to the method. With this operation, the lens apparatus 100 determines whether the operation console 300 is in a stopped state or an operated state, and enables lens driving suitable for each state.

  As described above, in the lens apparatus having the image blur correction optical system, it is possible to detect the movement of the operation table using the image blur detection unit.

  FIG. 11 is a cross-sectional view showing a configuration according to claims 7, 8, and 9. In FIG. The same parts as those described above are denoted by the same reference numerals.

  A difference from FIG. 15 is that a stop switch 57 for stopping the lens drive at the thumb ring 22 is newly added to the zoom operation unit 400. The stop switch 57 is provided on the grip 58 of the zoom operation unit 400, and is arranged so that the cameraman can easily touch it during shooting.

  FIG. 12 is a configuration diagram showing the configuration in the lens device 100 described above. The same parts as those described above are denoted by the same reference numerals. In FIG. 12, a stop switch 57 is newly added as in FIG.

  When receiving the signal from the stop switch 57, the CPU 3 stops the lens driving performed in response to the zoom operation signal 11 or the focus operation signal 12. When the signal output from the stop switch 57 is released, the lens driving corresponding to the zoom operation signal 11 or the focus operation signal 12 is resumed.

  In normal shooting, the cameraman operates the lens device 100 using the zoom operation unit 400 and the focus operation unit 500. Press stop switch 57 if you want to. While the lens is being pressed, the zoom or focus lens operation is stopped, and an erroneous operation in which the lens operates unintentionally can be avoided. Further, during operation of the operation console 300, it is possible to concentrate on the operation, and it is possible to maintain the state of view angle and focal length without fear of malfunction. In FIG. 12, the acceleration sensor 1 and the stop switch 57 are used in combination. Is possible.

  When the acceleration sensor 1 or the piezoelectric sensors 28 and 29 and the stop switch 57 are used together, the CPU 3 always gives priority to the operation of the stop switch 57. Therefore, the driving method of the lens by the output of the acceleration sensor 1 and the piezoelectric sensors 28 and 29 described above is stopped by the CPU 3 when the stop switch 57 is pressed even if the driving method is changed. With this function, in addition to the function of changing the driving method by making a unique determination on the lens device side, the photographer can use the camera according to the shooting situation by pressing the stop switch 57.

  In the function described above, the zoom or focus lens driving method is changed, but it is provided in the operation unit according to the output of the acceleration sensor 1 or the piezoelectric sensors 28 and 29 or by the stop switch 57. It is possible to stop other functions. For example, the function operation by the toggle switch 59 for switching the type of the focal length conversion optical system that can be inserted / removed provided in the zoom operation unit 400 or the monitor changeover switch 60 is changed to the acceleration sensor 1, the piezoelectric sensors 28, 29, and the stop switch 57. It can be stopped by the CPU 3 according to the output. As a result, not only the lens driving operation but also the accompanying functions can be stopped depending on the situation.

  FIG. 13 is a schematic diagram showing another configuration of the lens device, the television camera, and the operation console according to claim 10. The same parts as those described above are denoted by the same reference numerals.

  A difference from the configuration of FIG. 4 is that a display lamp 61 for displaying the lens driving state of the lens apparatus 100 is added to the monitor 8. Depending on the output of the acceleration sensor 1 and piezoelectric sensors 28 and 29, or when the zoom / focus lens driving method is changed by the stop switch 57, or when the operation of the function switch of the operation unit is stopped, the CPU 3 displays The lamp 61 is turned on to inform the photographer of the state. Therefore, the cameraman can always grasp the state of the lens apparatus while looking at the monitor 8, and can concentrate on photographing while recognizing that even when the lens driving method is switched.

It is a schematic diagram showing the composition concerning the claim of the present invention. It is a block diagram showing the structure concerning the claim of this invention. It is a graph showing the operation | movement concerning the claim of this invention. It is another outline figure showing composition concerning a claim of the present invention. It is another block diagram showing the structure concerning the claim of this invention. 6 is a graph showing an operation according to claim 3 of the present invention. 6 is a graph showing an operation according to claim 4 of the present invention. FIG. 6 is a sectional view showing a configuration according to claim 5 of the present invention. 6 is a graph showing an operation according to claim 5 of the present invention. 7 is a graph showing an operation according to claim 6 of the present invention. FIG. 7 is a cross-sectional view showing a configuration according to claims 7, 8 and 9 of the present invention. It is a block diagram showing the structure concerning Claim 7,8,9 of this invention. FIG. 16 is another schematic diagram showing the configuration according to claim 10 of the present invention. It is the schematic showing the conventional structure of the television camera, the lens apparatus, and the operation console. 4 is a cross-sectional view illustrating an internal configuration of a zoom operation unit 400. FIG. 2 is a configuration diagram showing a configuration in a lens apparatus 100. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Acceleration sensor 2 Evaluation calculation process part 3 CPU
11 Zoom operation signal 12 Focus operation signal 14 Motor 15 Lens 16 Rotary encoder 18 Motor 19 Lens 20 Rotary encoder 21 Memory 22 Thumbing 28 Piezo sensor 29 Piezo sensor 46 Motor 50 Rotary encoder 57 Stop switch 59 Toggle switch 60 Button switch 61 Display lamp 100 Lens device 200 TV camera 300 Operation table 400 Zoom operation unit 500 Focus operation unit 600 Zoom operation unit

Claims (10)

A zoom optical system, a focus optical system, and a driving unit that drives each lens of the zoom optical system and the focus optical system, a zoom operation unit, and a focus operation unit, and the zoom operation unit or the focus operation unit In a television lens apparatus that operates a lens via the driving means,
Panning operation, tilting operation, up-down operation, or movement operation of the operation table on which both the camera device that outputs the video signal of the image obtained by the photographing optical system of the lens device and the lens device are mounted A lens device comprising: an operation detection unit that detects a state; and a lens operation control unit that controls the operation of the lens of the lens device in accordance with a command signal from the operation detection unit.   2. The lens according to claim 1, wherein the lens operation control unit stops the lens operation according to the command signal from the zoom operation unit or the focus operation unit in response to a command signal from the operation detection unit. apparatus.   The lens operation control unit changes a dead zone region until the lens starts moving from a stop state according to a command signal from the zoom operation unit or the focus operation unit according to a command signal from the operation detection unit. 2. The lens device according to claim 1.   2. The lens operation control unit according to claim 1, wherein the lens operation tracking unit changes the follow-up performance of the lens operation according to the command signal from the zoom operation unit or the focus operation unit in accordance with a command signal from the operation detection unit. The lens device described.   The zoom operation unit or the focus operation unit includes an operation force changing unit that changes an operation force, and the lens operation control unit is configured to change the zoom operation unit or the focus according to a command signal from the operation detection unit. 2. The lens device according to claim 1, wherein the operating force of the operating means is changed.   The lens apparatus includes an image blur detection unit that detects an image blur of an image formed by the photographing optical system, and an image blur correction unit that corrects the image blur according to a command signal from the image blur detection unit, 6. The lens apparatus according to claim 1, wherein a command signal from the image blur detection unit is used as a command signal for the motion detection unit. A zoom optical system, a focus optical system, and a driving unit that drives each lens of the zoom optical system and the focus optical system, a zoom operation unit, and a focus operation unit, and the zoom operation unit or the focus operation unit In a television lens apparatus that operates a lens via the driving means,
The zoom operation means or the focus operation means is provided with a stop switch for stopping at least one lens operation, and according to a command signal of the stop switch, according to a command signal of the zoom operation means or the focus operation means A lens apparatus comprising lens operation control means for stopping lens operation.   It has both the motion detection means according to any one of claims 1 to 6 and the stop switch, and the lens operation by the command signal of the stop switch has priority over the lens operation by the command signal from the motion detection means. 8. The lens device according to claim 7, further comprising lens operation control means for operating the lens.   The zoom operation unit or the focus operation unit includes a function switch of a television camera other than the lens operation, and the lens operation control unit is configured to respond to a command signal from the operation detection unit or the stop switch. 9. The lens apparatus according to claim 1, wherein the operation of the function is stopped.   10. The lens device according to claim 1, further comprising a display unit that displays a lens operation state or a functional operation state changed by the lens operation control unit.

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