JP2005292650A - Lens apparatus and photographing apparatus using the same - Google Patents

Abstract

An object of the present invention is to provide a lens device that allows a photographer to quickly start photographing after power is turned on.
To solve the problem, when switching to relative position control after completion of initialization to initialize the absolute position of the optical element by manual drive control after turning on the power, the power is turned off. It is configured to have control means for performing relative position control with the absolute position of the optical element stored before as the absolute position after power-on.
[Selection] Figure 1

Description

  The present invention relates to a lens apparatus, and relates to a photographing apparatus used for a television camera, a video camera, a television lens, a video lens, and the like equipped with the lens apparatus.

  The structure of a television lens for a broadcast television camera such as an ENG camera that has been used in recent years for news reports, broadcasts, dramas, varieties, documentaries, etc. will be described with reference to FIGS.

FIG. 11 is a top view of the ENG camera zoom lens, and FIG. 12 is a side view of the zoom lens for the ENG camera.
As shown in FIGS. 11 and 12, reference numeral 100 is not shown, but a lens barrel 101 in which a fixed focus lens, a moving focus lens, a zoom lens, an iris mechanism, a relay lens, and an extender are arranged, 101 A focus ring for moving and moving the focus lens back and forth along the optical axis by rotating, and a zoom ring for adjusting the zoom by moving the zoom lens back and forth along the optical axis by rotating. , 103 is an iris ring in which the iris diaphragm diameter is adjusted by rotating, 104 is attached to the barrel of the ENG zoom lens, a motor for driving the zoom, focus, iris electrically, a position detector, Control circuit, zoom, focus, iris are driven electrically or manually A drive unit containing a clutch, a switch, and the like for switching the operation, 105 a zoom switch for controlling the zoom when electrically driving, 106 an iris for switching whether the iris is driven electrically or manually The electric / manual changeover switch 107 is an electric interface between the ENG lens and the ENG camera. A command signal for driving the iris electrically is supplied from the ENG camera side, and the position signal of the zoom lens, the focus lens, and the iris mechanism. Is a camera cable that supplies the zoom lens to the ENG camera side, 108 is a zoom switch speed variable volume that varies the drive speed of the zoom lens with respect to the operation amount of the zoom switch 105 when the zoom is electrically driven, and 109 is the zoom that is electrically driven Drive manually Zoom clutch for switching whether, 110 or to drive the focus demand, a focus clutch for switching whether to drive manually.

  Furthermore, FIG. 13 shows the configuration of the ENG camera and the zoom lens for the ENG camera.

  In the figure, reference numeral 200 denotes a television lens composed of a lens barrel 100 and a lens cable 107, 201 denotes a lens cable 107, and a CCD 40, a video signal processing unit 41, a video signal recording / playback unit 42, and a video signal display. A TV camera unit including a unit 43 and the like. 1 is a zoom speed command signal for instructing a zoom drive direction and a zoom drive speed proportional to an operation amount of the zoom switch 105 in order to electrically drive a zoom lens optical system 9 described later. Zoom speed command signal generating means for detecting The zoom speed command signal generating means 1 includes a potentiometer, an analog detector such as a volume, a digital detector such as a rotary encoder, and the like. Reference numeral 2 denotes a zoom speed command signal calculation means for performing signal level conversion / signal shift conversion in order to capture the zoom speed command signal into an A / D conversion means 3 described later. Reference numeral 3 denotes an analog signal output from the zoom speed command signal calculation means 2. A / D conversion means for converting a digital signal into a digital signal, 4 is a CPU that controls the operation of each function of the TV lens 200, 5 is a digital zoom control signal output from the CPU 4 to electrically drive a zoom lens optical system 9 to be described later D / A conversion means for converting a signal into an analog signal, 6 is a zoom control signal calculation means for performing signal level conversion / signal shift conversion of a zoom control signal output from the D / A conversion means 5, and 7 is a zoom motor described later. Zoom power amplifying means for driving 8, a zoom motor for driving a zoom lens optical system 9 to be described later, and 9 for adjusting the magnification of the optical device The zoom lens optical system 10 performs zoom absolute position signal detection means 10 for outputting a zoom absolute position signal corresponding to the absolute position of the zoom lens optical system 9, and 11 takes in the zoom absolute position signal to an A / D conversion means 12 described later. Therefore, zoom absolute position signal calculation means 12 for performing signal level conversion / signal shift conversion, 12 is an A / D conversion means for converting an analog signal output from the zoom absolute position signal calculation means 11 into a digital signal, and 13 is a zoom switch speed. Zoom switch speed variable volume position signal calculation means 14 for performing signal level conversion / signal shift conversion for taking in the variable volume position signal into the A / D conversion means 14 described later, and 14 is output from the zoom switch speed variable volume position signal calculation means 13. A / D conversion means for converting an analog signal to be converted into a digital signal, 1 It is connected to the television lens 200, a zoom demand unit for controlling the zoom lens optical system 9 by the zoom demand operation unit 16 to be described later. A zoom demand operation unit 16 controls the zoom lens optical system 9 by manipulating the angle. Reference numeral 17 denotes a zoom demand counter that detects a zoom drive position signal proportional to the operation rotation angle of the zoom demand operation unit 16. The zoom demand counter 17 includes a potentiometer, an analog detector such as a volume, a digital detector such as a rotary encoder, and the like.

  Reference numeral 18 denotes a D / A conversion means for converting a focus control signal output for electrically driving a focus lens optical system 22 (to be described later) from the CPU 4 from a digital signal to an analog signal. Reference numeral 19 denotes a focus output from the D / A conversion means 18. Focus control signal calculation means for performing signal level conversion / signal shift conversion of control signals, 20 a focus power amplification means for driving a focus motor 21 described later, 21 a focus motor for driving a focus lens optical system 22 described later, and 22 A focus lens optical system for adjusting the focus of the optical device, 23 is a focus absolute position signal detecting means for outputting a focus absolute position signal corresponding to the absolute position of the focus lens optical system 22, and 24 is a focus absolute position signal to be described later. The signal level change to be taken into the D conversion means 25 Focus absolute position signal calculation means 25 for performing signal shift conversion, 25 is an A / D conversion means for converting an analog signal output from the focus absolute position signal calculation means 24 into a digital signal, and 26 is connected to the TV lens 200, which will be described later. The focus demand unit controls the focus lens optical system 22 by the focus operation unit 27. A focus demand operation unit 27 controls the focus lens optical system 22 by manipulating the angle. A focus demand counter 28 detects a focus drive position signal proportional to the operation rotation angle of the focus demand operation unit 27. The focus demand counter 28 includes a potentiometer, an analog detector such as a volume, and a digital detector such as a rotary encoder.

  Reference numeral 29 denotes a D / A conversion means for converting an iris control signal output from the CPU 4 to electrically drive an iris mechanism 33 (to be described later) from a digital signal to an analog signal. Reference numeral 30 denotes an iris control signal output from the D / A conversion means 29. Iris control signal calculating means for performing signal level conversion / signal shift conversion, 31 is an iris power amplifying means for driving an iris motor 32 described later, 32 is an iris motor for driving an iris mechanism 33 described later, and 33 is a light quantity of the optical device. An iris mechanism 34 for adjusting, an iris absolute position signal detecting means for outputting an iris absolute position signal corresponding to the absolute position of the iris mechanism 38, and 35 for taking the iris absolute position signal into an A / D conversion means 36 described later. Iris absolute position signal calculation means for performing signal level conversion / signal shift conversion, 36 A / D conversion means for converting an analog signal output from the iris relative position signal calculation means 35 into a digital signal, 37 is a lens information display section for displaying various operating states of the TV lens 200, and 38 is various information for the TV lens 200. A volatile storage unit that stores various information, a CPU 39 that controls the operation of each function of the TV camera 201, and a CCD (40) that converts an optical signal input through the TV lens 200 into an electrical signal and outputs it as an image signal. Imaging device), 41 is a video signal processing unit for processing a video signal output from the CCD 40, 42 is a video signal recording / reproducing unit for recording / reproducing the video signal processed by the video signal processing unit 41, and 43 is a television camera. A video signal display unit 44 displays various operating states of 201 and a captured video, and 44 is a power source supplied from a power supply unit 46 to be described later. Further, a reference voltage generation unit for generating a reference voltage, 45 is a power supply switching unit for inputting / disconnecting power to the TV camera 201, and 46 is a power supply unit for supplying power to the TV lens 200 and the TV camera 201. .

  In the above configuration, operations of the zoom switch 105, the zoom clutch 109, and the zoom demand operation unit 16 when the zoom lens optical system 9 is operated by the ENG zoom lens and the ENG camera will be described. When the zoom clutch 109 is OFF and the zoom switch 105 is operated, the operation amount is calculated by the zoom speed command signal generation means 1, the zoom speed command signal calculation means 2, the A / D conversion means 3, and the CPU 4. When the zoom demand unit 15 is operated, the operation amount is calculated by the zoom demand counter 17 and the CPU 4. At the same time, the absolute position of the zoom lens optical system 9 is calculated by the zoom absolute position detection means 10, the zoom absolute position signal calculation means 11, and the A / D conversion means 12, and based on these operation amounts and absolute positions, the CPU 4 The target position of the zoom lens optical system 9 is calculated. Based on this target position, the zoom lens optical system 9 is driven by the D / A conversion means 5, zoom control signal calculation means 6, zoom power calculation means 7, and zoom motor 8.

  Next, operations of the focus clutch 110 and the focus demand operation unit 27 when the focus lens optical system 22 is operated by the ENG zoom lens and the ENG camera in the above configuration will be described. When the focus clutch 110 is turned off and the focus demand unit 26 is operated, the operation amount is calculated by the focus demand counter 28 and the CPU 4. At the same time, the absolute position of the focus lens optical system 22 is calculated by the focus absolute position detection means 23, the focus absolute position signal calculation means 24, and the A / D conversion means 25, and based on these operation amounts and absolute positions, the CPU 4 The target position of the focus lens optical system 22 is calculated. Based on this target position, the focus lens optical system 22 is driven by the D / A conversion means 18, the focus control signal calculation means 19, the focus power calculation means 20, and the focus motor 21.

  Next, the operation of the iris electric / manual changeover switch 106 when the iris mechanism 33 is operated by the ENG zoom lens and the ENG camera in the above configuration will be described. When the iris electric / manual changeover switch 106 is set to electric, the absolute position of the iris mechanism 33 is calculated by the iris absolute position signal detecting means 34, the iris absolute position signal calculating means 35, and the A / D converting means 36. At the same time, according to the processing result of the video signal processing unit 41, the CPU 39 calculates the operation amount by the iris focus demand counter 28 and the CPU 4. At the same time, the absolute position of the focus lens optical system 22 is calculated by the focus absolute position detection means 23, the focus absolute position signal calculation means 24, and the A / D conversion means 25, and based on these operation amounts and absolute positions, the CPU 4 The target position of the focus lens optical system 22 is calculated. Based on this target position, the focus lens optical system 22 is driven by the D / A conversion means 18, the focus control signal calculation means 19, the focus power calculation means 20, and the focus motor 21.

There has been proposed a configuration in which an ENG camera zoom lens is provided with relative position signal detection means together with absolute position signal detection means (see Patent Documents 1 and 2).
JP 2001-290067 A Japanese Patent Laid-Open No. 10-274737

  However, in the above conventional example, since the position of the lens is detected using the absolute position detection means such as a potentiometer and the A / D conversion means, the noise due to the friction of the potentiometer and the resolution of the A / D conversion means are limited. It is difficult to improve the lens position detection accuracy. Further, since A / D conversion means is required, there is a problem that the circuit scale is increased and the cost is increased.

  On the other hand, relative position detection means such as optical incremental sensors and magnetic incremental sensors have higher resolution and less noise than absolute position detection means, and do not require A / D conversion means. When the drive is set to electric drive, the above-mentioned problem is solved by performing the initialization automatically after turning on the power. However, when the drive is set to manual drive, the initialization is automatically performed after turning on the power. As a result, there is a problem that it is difficult to mount the relative position detecting means in the television lens having the manual driving means. Furthermore, depending on the purpose of use, the number of times of turning on and off the power may be large, and the initialization is automatically performed many times during one-day shooting. As a result, shooting cannot be started quickly, which is troublesome for the photographer, but also causes problems such as moving images during initialization, and unnecessary battery consumption in the case of battery drive. There was a problem.

  In view of such a problem, an object of the present application is to make it possible to initialize the absolute position semi-automatically after turning on the power in the case where the relative position detecting means is mounted in the television lens having the manual driving means. Thus, it is possible to realize more accurate operability without the photographer adjusting the absolute position of the lens every time the power is turned on.

In order to solve the above problem, a first invention of the present invention comprises an optical element, a manual operation means for manually driving the optical element, and a relative position detection means, and the optical element is positioned at a relative position. A lens device for controlling and manually driving,
After the power is turned on, a signal indicating that the absolute position signal of the optical element is invalid is transmitted to the camera apparatus before initialization for initializing the absolute position of the optical element by manual drive control is completed. It has a characteristic configuration.

According to a second aspect of the present invention, there is provided a lens apparatus comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detecting means, and performing relative position control and manual drive control of the optical element. There,
After the power is turned on, before the initialization for initializing the absolute position of the optical element by manual drive control is completed, the absolute position signal of the optical element is not transmitted to the camera device.

According to a third aspect of the present invention, there is provided a lens device comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detecting means, and performing relative position control and manual drive control of the optical element. There,
Furthermore, the storage means for storing the absolute position of the optical element before the power is turned off,
After the power is turned on, before the initialization for initializing the absolute position of the optical element by manual drive control is completed, the absolute position signal of the optical element stored before the power is turned off is transmitted to the camera device. The structure to be taken is taken.

  According to a fourth aspect of the present invention, in addition to the first to third aspects, after the initialization is completed, an absolute position signal after completion of the initialization is transmitted to the camera device.

According to a fifth aspect of the present invention, there is provided a lens device comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detection means, and performing relative position control and manual drive control of the optical element. There,
Furthermore, the storage means for storing the absolute position of the optical element before the power is turned off,
After the power is turned on, if the absolute position of the optical element is initialized by manual drive control before the initialization is completed, the absolute position of the optical element stored before the power is turned off It is configured to have a control means for performing relative position control as the absolute position after the insertion.

  According to a sixth aspect of the present invention, in addition to the fifth aspect, after the initialization is completed, a relative position control is performed using the absolute position after the initialization is completed.

  According to a seventh aspect of the present invention, in addition to the fifth aspect, after the power is turned on, switching to the relative position control is performed before the initialization for initializing the absolute position of the optical element by manual drive control is completed. In this case, until the initialization is completed, a control unit is provided that controls the relative position control drive speed of the optical element to be within a speed range smaller than the maximum speed of the lens device.

  According to an eighth aspect of the present invention, in addition to the sixth aspect, after the power is turned on, switching to the relative position control is performed before the initialization for initializing the absolute position of the optical element by manual drive control is completed. In this case, until the initialization is completed, when the optical element is driven in the driving end direction, the control speed of the relative position control of the optical element is controlled within a speed range smaller than the maximum speed of the lens device. It is set as the structure which has a means.

According to a ninth aspect of the present invention, there is provided a lens apparatus comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detecting means, and performing relative position control and manual drive control of the optical element. There,
After the power is turned on, until the initialization for initializing the absolute position of the optical element by manual drive control is completed, the drive speed of the relative position control of the optical element is within a speed range smaller than the maximum speed of the lens device. It is set as the structure which has a control means to do.

  In consideration of preventing collision at the lens mechanical end, the speed smaller than the maximum speed is preferably 85% or less of the maximum speed.

  More preferably, the speed smaller than the maximum speed is 75% or less of the maximum speed.

  According to a tenth aspect of the present invention, in addition to the first to ninth aspects, when the power is turned off, the absolute position of the optical element is stored in the nonvolatile storage unit before the power supply voltage level becomes zero. To do.

  According to an eleventh aspect of the present invention, in addition to the first to ninth aspects, when the power is turned off, the absolute position of the optical element is stored in the nonvolatile storage unit before the voltage level of the power source becomes zero. To do.

  According to a twelfth aspect of the present invention, in addition to the first to ninth aspects, the absolute position of the optical element is stored in a nonvolatile storage section at predetermined time intervals during the relative position control.

  According to a thirteenth aspect of the present invention, in addition to the first to ninth aspects, when the power is turned off, the absolute position of the optical element is stored from the camera device into the lens device before the voltage level of the power source becomes zero. By transmitting a comment signal, the absolute position of the optical element is stored in the nonvolatile storage unit.

  According to a fourteenth aspect of the present invention, in addition to the first to thirteenth aspects, the optical element is a zoom lens, a focus lens, or an iris.

  According to a fifteenth aspect of the present invention, in addition to the first to fourteenth aspects, in addition to the relative position control method for controlling the relative position, an absolute position control method for controlling the absolute position of the optical element is provided. .

  According to a sixteenth aspect of the present invention, there is provided a photographing apparatus including the lens device according to the first to tenth aspects and a camera device attached to the lens device.

  After the power is turned on, if the absolute position of the optical element is initialized by manual drive control before the initialization is completed, the absolute position of the optical element stored before the power is turned off By adopting a configuration having a control unit that performs relative position control as an absolute position after being turned on, high-accuracy operability is realized, and at the same time, the photographer can start shooting quickly after turning on the power.

In this embodiment, the absolute position is automatically initialized every time the power is turned on using the relative position detection means and the origin detection means such as an optical incremental sensor and a magnetic incremental sensor, and the power is turned on during normal use. Sometimes semi-automatically initializes absolute position,
By realizing high-precision position detection of the lens, it is possible to omit the initialization work of the absolute position every time the power is turned on by the photographer,
As a result, in the lens having the manual drive means, high-precision operability is realized, and at the same time, the photographer can start photographing quickly after turning on the power.

In addition, absolute position initialization is automatically performed every time the power is turned on using relative position detection means and origin detection means such as an optical incremental sensor and magnetic incremental sensor, and semi-automatically when the power is turned on during normal use. Whether the speed at the time of electric drive is limited to low speed or the speed at the time of electric drive in the end direction is limited to low speed until the initialization in normal use is completed. Or by prohibiting electric drive in the end direction,
It is possible to prevent collisions at the edge in high-speed driving due to an incorrect absolute position before initialization is completed, and it is possible for the photographer to recognize that the position calculation value is the value before completion of initialization. Furthermore, it is possible to prevent a malfunction such as using a position calculation value with a large error in an operation mode that requires a highly accurate absolute position such as a virtual studio.

In addition, absolute position initialization is automatically performed every time the power is turned on using relative position detection means and origin detection means such as an optical incremental sensor and magnetic incremental sensor, and semi-automatically when the power is turned on during normal use. By initializing the absolute position and storing the absolute position detection value when the power is turned off,
After the power is turned on during normal use, it is possible to start shooting immediately after the power is turned on until the initialization is completed, and the video shot immediately after the power is turned on is not intended by the photographer. At the same time, if the electric control means is set before the initialization is completed, it is possible to prevent the lens from colliding with the T end or the W end at a high speed, and at the same time the initialization is performed. Even before completion, the absolute position of the lens can be displayed on the camera viewer.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1, 2, 3, and 4.

  In FIG. 1, 1 to 9, 13 to 22, 26 to 33, and 37 to 46 are the same as those in FIG. In the figure, reference numeral 47 denotes zoom relative position signal detecting means for outputting a zoom relative position signal corresponding to the relative position of the zoom lens optical system 9. The zoom relative position signal detection means 47 is constituted by an optical incremental sensor, a magnetic incremental sensor, or the like.

  Reference numeral 48 denotes zoom origin detecting means for detecting the origin position of the zoom lens as an absolute value. The zoom origin detection means 48 is configured by edge detection using reflection or non-reflection of LEDs.

  Reference numeral 49 denotes focus relative position signal detection means for outputting a focus relative position signal corresponding to the relative position of the focus lens optical system 22. The focus relative position signal detection means 49 includes an optical incremental sensor, a magnetic incremental sensor, and the like.

  Reference numeral 50 denotes focus origin detection means for detecting the origin position of the focus lens as an absolute value. The focus origin detection means 50 is configured by edge detection using reflection or non-reflection of LEDs.

  Reference numeral 51 denotes iris relative position signal detection means for outputting an iris relative position signal corresponding to the absolute position of the iris mechanism 33. The iris relative position signal detection means 49 includes an optical incremental sensor, a magnetic incremental sensor, and the like.

  52 is an iris origin detecting means for detecting the origin position of the iris mechanism 33 as an absolute value. The iris origin detection means 52 is configured by edge detection using reflection or non-reflection of LEDs. Reference numeral 53 denotes a nonvolatile storage unit.

  2 and 3 are flowcharts showing the initialization procedure at the time of shipment of the zoom relative position signal detecting means 47 executed by the CPU 4 in this embodiment. In FIG. 2, in step 101, if the CPU 4 detects that the power switch 45 is turned on, the process proceeds to step 102, and if the CPU 4 does not detect that the power switch 45 is turned on, the process proceeds to step 101. In Step 102, when the CPU 4 detects a shipping initialization start command, the process proceeds to step 103. When the CPU 4 does not detect a shipping initialization start command, the normal processing shown in FIG. 4 is started. In Step 103, the zoom lens optical system 9 is driven in the W direction, and the process proceeds to Step 104. In Step 104, if the zoom origin position detection unit 48 detects an edge, the process proceeds to Step 105. If the zoom origin position detection unit 48 does not detect an edge, the process proceeds to Step 111. In Step 111, if the CPU 4 detects that the zoom lens optical system 9 is in contact with the W end, the process proceeds to step 112. If it is not detected that the zoom lens optical system 9 is in contact with the W end, the process proceeds to step 103. In Step 105, the count value: C is initialized, and the process proceeds to Step 106. In Step 106, the zoom lens optical system 9 is driven in the W direction, and the process proceeds to Step 107. In Step 107, the count value: C is incremented, and the process proceeds to Step 108. In Step 108, if the CPU 4 detects that the zoom lens optical system 9 is in contact with the W end, the process proceeds to step 109. If the CPU 4 does not detect that the zoom lens optical system 9 is in contact with the W end, the process proceeds to step 106. In Step 109, the count value: Cw is stored in the nonvolatile storage unit 53 as the W end position, and the process proceeds to Step 110. In Step 110, it is confirmed whether or not the T-end position Ct has been stored after the power is turned on. If not stored, the process proceeds to step 112. In Step 112, the zoom lens optical system 9 is driven in the T direction, and the process proceeds to Step 113. In step 113, if the zoom origin position detecting means 59 detects an edge, the process proceeds to step 114. If the zoom origin position detecting means 48 does not detect an edge, the process proceeds to step 120. In Step 120, when the CPU 4 detects that the zoom lens optical system 9 is in contact with the T end, the process proceeds to Step 112. If it is not detected that the zoom lens optical system 9 has touched the T end, the process proceeds to step 103. In Step 114, the count value: C is initialized, and the process proceeds to Step 115. In Step 115, the zoom lens optical system 9 is driven in the T direction, and the process proceeds to Step 116. In Step 116, the count value: C is incremented, and the process proceeds to Step 117. In Step 117, if it is detected that the zoom lens optical system 9 is in contact with the T end, the process proceeds to step 118. If it is not detected that the zoom lens optical system 9 is in contact with the T end, the process proceeds to step 115. In Step 118, the count value: Ct is stored in the nonvolatile storage unit 53 as the T-end count value, and the process proceeds to step 119. In Step 119, it is confirmed whether or not the W end position Cw has been stored after the power is turned on. If the W end position Cw has been stored, the process proceeds to the normal processing of FIG. 4, and if the W end position Cw has not been stored, the process proceeds to step 103. Thereafter, the same processing is repeated.

  FIG. 4 is a flowchart showing an initialization procedure in normal processing of the zoom relative position signal detection means 47 executed by the CPU 4 in this embodiment. In FIG. 4, when the CPU 4 detects that the power switch 45 is turned off in step 201, the process proceeds to step 211, the detected position is stored in the nonvolatile storage unit 53 as the position before the power is turned off, and the process proceeds to step 101 in FIG. If the CPU 4 does not detect that the power switch 45 is turned off, the process proceeds to step 202. Note that details of the means for storing the position before power-off in step 211 are shown in the third embodiment. In Step 202, the zoom lens optical system 9 is driven based on the command, and the process proceeds to step 203. In Step 203, if the zoom origin position detecting means 48 detects an edge, the process proceeds to step 204. If the zoom origin position detecting means 48 does not detect an edge, the process proceeds to step 201. When the CPU 4 detects that the drive method of the zoom lens optical system 9 has been switched to electric during the period from step 202 to step 203, the zoom origin is automatically driven as in step 203 by automatically driving to the edge. The position detection means 48 may be able to detect the edge. In Step 204, the count value: C is initialized, the count is started, and the process proceeds to Step 205. In Step 205, when the CPU 4 detects that the power switch 45 is turned off, the process proceeds to Step 211. In step 211, the above-described processing is performed, and the process proceeds to step 101 in FIG. 2. If the CPU 4 does not detect that the power switch 45 is turned off, the process proceeds to step 206. In Step 206, if the CPU 4 detects a drive command in the W direction, the process proceeds to step 207. If the CPU 4 does not detect a drive command in the W direction, the process proceeds to step 209. In Step 207, it is determined whether or not the count value: C satisfies C <Cw. If this holds, the process proceeds to Step 208. If this does not hold, the process proceeds to Step 205. In Step 208, the zoom lens optical system 9 is driven in the command direction, and the process proceeds to Step 205. In Step 209, if the CPU 4 detects a drive command in the T direction, the process proceeds to step 210. If the CPU 4 does not detect a drive command in the T direction, the process proceeds to step 205. In Step 210, it is determined whether or not the count value: C satisfies C <Ct. If this holds, the process proceeds to Step 208. If this does not hold, the process proceeds to Step 205, and the same processing is repeated thereafter.

  In steps 201, 202, and 203, since the detection value of the zoom relative position signal detection unit may be different from the absolute position, it may be displayed on the lens information display unit 37 that initialization is in progress. When the communication of the lens cable 107 is performed by serial communication, transmission of a zoom lens position signal may be prohibited, or a command indicating that the position signal of the zoom lens being initialized may be transmitted. Further, when the communication of the lens cable 107 is performed with an analog value, a line indicating permission / prohibition of transmission of the zoom lens position signal may be provided, and this may be prohibited during initialization.

  In the present embodiment, the case of the zoom lens optical system 9 has been described. However, the relative position detection means may be initialized by the same processing in the case of the focus lens optical system 22 and the iris mechanism 33.

As described above, the zoom lens, the optical device having the focus lens and the iris mechanism, the zoom lens, the focus lens, the driving means installed in the iris mechanism, and controlling the driving means of the zoom lens An optical apparatus having zoom operation means for operating a zoom lens, focus operation means for operating the focus lens by controlling the drive means for the focus lens, and iris drive switching means for switching the iris mechanism between electric drive and manual drive In
After turning on the power, by completing initialization while performing normal operation, it is possible to apply the relative position detection means to the TV lens,
As a result, by automatically initializing the relative position detection means by the absolute position detection means, it does not give a sense of incongruity to the photographer or the like such as movement of the zoom ring, focus ring or iris ring or change of the image. Compared with the method using the absolute position detection means up to the above, it is possible to realize position detection and operability with high resolution and to realize cost reduction by downsizing the circuit.

(Second embodiment)
Embodiments of the present invention will be described below with reference to FIGS. 1, 2, 3 and 5 and 6. FIG.

  FIG. 1 shows a configuration of an optical apparatus in which the second embodiment of the present invention is implemented, and FIGS. 2 and 3 are flowcharts showing initialization procedures at the time of zoom relative position signal detecting means 47 executed by the CPU 4. Since this figure is the same as that of the first embodiment, its description is omitted.

  FIGS. 5 and 6 are flowcharts showing the initialization procedure of the zoom relative position signal detecting means 47 executed by the CPU 4 in this embodiment. 5, when the CPU 4 detects that the power switch 45 is turned off in step 301, the process proceeds to step 313, the detected position is stored in the nonvolatile storage unit 53 as the position before the power is turned off, and the process proceeds to step 101 in FIG. 2. If the CPU 4 does not detect that the power switch 45 is turned off, the process proceeds to step 302. Note that details of the means for storing the position before power-off in step 313 are shown in the third embodiment. In step 302, it is determined whether or not the zoom clutch 109 is set to manual. If the zoom clutch 109 is set to manual, the process proceeds to step 303. If the zoom clutch 109 is not set to manual, the process proceeds to step 304. move on. In Step 303, the zoom lens optical system 9 is driven based on the command of the zoom ring 102, and the process proceeds to Step 305. In Step 304, the zoom lens optical system 9 is driven at a low speed in the command direction, and the process proceeds to Step 305. In step 304, when the CPU 4 detects that the driving method of the zoom lens optical system 9 has been switched to electric, the CPU 4 automatically drives to the edge, thereby proceeding to step 305, where the zoom origin position detecting means 48 sets the edge. It may be possible to detect. In Step 305, it is determined whether or not an edge is detected by the zoom origin position detecting means 48. If the edge is detected by the zoom origin position detecting means 48, the process proceeds to Step 306, and no edge is detected by the zoom origin position detecting means 48. If YES, go to step 301. In Step 306, the count value: C is initialized, the count is started, and the process proceeds to Step 307. In Step 307, it is determined whether or not it is detected that the power switch 45 is turned off. If the CPU 4 detects that the power switch 45 is turned off, the process proceeds to Step 313. In Step 313, the above-described processing is performed, and the process proceeds to Step 101 in FIG. 2. If the CPU 4 does not detect that the power switch 45 is turned off, the process proceeds to Step 308. In Step 308, it is determined whether or not the CPU 4 detects a drive command in the W direction. If the CPU 4 detects a drive command in the W direction, the process proceeds to step 309, and the CPU 4 does not detect a drive command in the W direction. If YES, go to step 311. In Step 309, it is determined whether or not C <Cw holds in the count value: C. If this holds, the process proceeds to Step 310, and if this does not hold, the process proceeds to Step 307. In Step 310, the zoom lens optical system 9 is driven in the command direction, and the process proceeds to Step 307. In Step 311, it is determined whether or not the CPU 4 detects a drive command in the T direction. If the CPU 4 detects a drive command in the T direction, the process proceeds to step 312, and the CPU 4 detects the drive command in the T direction. If not, the process proceeds to step 307. In Step 312, it is determined whether or not C <Ct holds in the count: value C. If this holds, the process proceeds to Step 310, and if this does not hold, the process proceeds to Step 307, and the same processing is repeated thereafter.

  In steps 301, 302, 303, and 304, since the detection value of the zoom relative position signal detection means may be different from the absolute position, it may be displayed on the lens information display section 37 that initialization is in progress. When the communication of the lens cable 107 is performed by serial communication, transmission of a zoom lens position signal may be prohibited, or a command indicating that the position signal of the zoom lens being initialized may be transmitted. Further, when the communication of the lens cable 107 is performed with an analog value, a line indicating permission / prohibition of transmission of the zoom lens position signal may be provided, and this may be prohibited during initialization.

  In step 304, the zoom lens optical system 9 is driven at a low speed in the command direction of the zoom switch 105 or the zoom demand operation unit 16, but when the command direction is the origin direction, the speed is as commanded and only in the end direction. It may be possible to drive at a low speed. Further, when the command direction is the origin direction, the speed may be set according to the command and it may be possible not to drive in the end direction. Further, the driving is performed until just before the end based on the absolute position stored in the nonvolatile storage unit 53, but it is possible to prohibit the driving after that. When the control method is the position control method, whether or not the command direction is the end direction is determined based on the position before power-off stored in the nonvolatile storage unit 53 in step 313.

  In the present embodiment, the case of the zoom lens optical system 9 has been described. However, the relative position detection means may be initialized by the same processing in the case of the focus lens optical system 22 and the iris mechanism 33.

As described above, the zoom lens, the optical device having the focus lens and the iris mechanism, the zoom lens, the focus lens, the driving means installed in the iris mechanism, and controlling the driving means of the zoom lens An optical apparatus having zoom operation means for operating a zoom lens, focus operation means for operating the focus lens by controlling the drive means for the focus lens, and iris drive switching means for switching the iris mechanism between electric drive and manual drive In
Immediately after the power is turned on, until the initialization is completed, it is possible to drive at low speed regardless of the command signal, or drive at low speed only when driving in the end direction. Or can be driven in the end direction,
As a result, it is possible to prevent a collision at the end in the high-speed drive due to an excessive position calculation value before the initialization is completed, and the photographer confirms that the position calculation value is a value before the initialization is completed. Makes it possible to recognize
Furthermore, it is possible to prevent a malfunction such as using a position calculation value with a large error in an operation mode that requires a highly accurate position calculation value, such as a virtual studio.

  Here, the low speed means 85% or less of the maximum speed. Preferably, 75% or less of the maximum speed is good.

(Third embodiment)
Embodiments of the present invention will be described below with reference to FIGS. 1, 2, 3 and 7, and 8. FIG.

  FIG. 1 shows a configuration of an optical apparatus in which the third embodiment of the present invention is implemented, and FIGS. 7 and 8 are flowcharts showing a factory initialization procedure of the zoom relative position signal detecting means 47 executed by the CPU 4. Since this figure is the same as that of the first embodiment, its description is omitted.

  7 and 8 are flowcharts showing the initialization procedure of the zoom relative position signal detecting means 47 executed by the CPU 4 in this embodiment. In the figure, steps 402, 403, 404, 410, 411, 412, 414, 415, 416, 417, 418 are steps 302, 303, 304, 305, 306, 307, 308, 309, 310 of FIGS. , 311, 312, the description is omitted. In step 401, if it is detected in step 401 that the power switch 45 is turned off, the process proceeds to step 413. If it is not detected that the power switch 45 is turned off, the process proceeds to step 402. In Step 413, the count value: C is stored in the nonvolatile storage unit 53 as the temporary position C2, and the process proceeds to Step 101 in FIG. However, when the control method is set to the speed control method instead of the position control method, it is not necessary to store the position before the power-off as described above, so the control set before step 413 is performed. It is possible to check the method and store the data in the nonvolatile storage unit 53 only when the position control is set. In step 405, it is determined whether or not a drive command in the W direction has been detected. If a drive command in the W direction is detected, the process proceeds to step 406, and if a drive command in the W direction is not detected, the process proceeds to step 408. move on. In Step 406, it is determined whether or not C <Cw holds in the count value C. If this holds, the process proceeds to Step 407, and if this does not hold, the process proceeds to Step 410. In Step 407, the zoom lens optical system 9 is driven in the command direction, and the process proceeds to Step 410. In Step 408, it is determined whether or not a drive command in the T direction is detected. If a drive command in the T direction is detected, the process proceeds to Step 409. If a drive command in the T direction is not detected, the process proceeds to Step 410. In Step 409, it is determined whether or not C <Ct holds in the count value C. If this holds, the process proceeds to Step 407, and if this does not hold, the process proceeds to Step 410, and the same processing is repeated thereafter.

  In steps 401 and 412, it is determined whether or not the power switch 45 has been turned off based on whether or not the power supply voltage has dropped below a certain value. As a result, if it is determined that the power switch 45 has been turned off, the process proceeds to step 413. However, by confirming that the power supply voltage has completely dropped to the ground level by separately configuring the power source for the small battery, etc., proceed to step 413 with the power source for the small battery, etc., and set the zoom position when the power is turned off. It may be possible to store in the nonvolatile storage unit 53.

  Alternatively, it is possible to store the zoom position at the time of power-off in the nonvolatile storage unit 53 by performing the same processing as step 413 at regular intervals in steps 411, 412, 414, 415, 416, 417, and 418. Good.

  Alternatively, when the zoom lens optical system 9 is stopped at steps 411, 412, 414, 415, 416, 417, and 418 for a predetermined time or longer, the same processing as step 413 is performed, so that the zoom position when the power is turned off is stored in the nonvolatile storage unit. 53 may be stored.

  Alternatively, immediately after the power supply switching unit 45 is turned off and before the power is turned off, the CPU 39 of the TV camera unit 201 transmits a command for instructing the same processing as step 413 through the lens cable 107. The zoom position when the power is turned off may be stored in the nonvolatile storage unit 53.

  In the present embodiment, the case of the zoom lens optical system 9 has been described. However, the relative position detection means may be initialized by the same processing in the case of the focus lens optical system 22 and the iris mechanism 33.

As described above, the zoom lens, the optical device having the focus lens and the iris mechanism, the zoom lens, the focus lens, the driving means installed in the iris mechanism, and controlling the driving means of the zoom lens An optical apparatus having zoom operation means for operating a zoom lens, focus operation means for operating the focus lens by controlling the drive means for the focus lens, and iris drive switching means for switching the iris mechanism between electric drive and manual drive In
By storing the lens position when the power is turned off in the nonvolatile storage unit, the temporary lens position is calculated after the power is turned on again until the initialization is performed by detecting the edge of the origin detection means. By making it possible to drive the lens and to send the temporary lens position back to the camera,
It is possible to start shooting immediately after the power is turned on, and it is possible to prevent the video shot immediately after the power is turned on from being unintended by the photographer. It is possible to display the lens position on the viewer of the camera, and at the same time, it is possible to prevent the lens from colliding with the T end or W end at high speed during electric control.

Block diagram of the first, second and third embodiments Initialization flowchart 1 at the time of shipment of the first, second and third embodiments Initialization process flowchart 2 of the first, second, and third embodiments Normal initialization process flowchart 1 of the first embodiment Normal initialization process flowchart 1 of the second embodiment Normal initialization process flowchart 2 of the second embodiment Normal initialization process flowchart 1 of the third embodiment Normal initialization process flowchart 2 of the third embodiment Zoom lens top view Zoom lens side view Block diagram of conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Zoom speed command signal generation means 2 Zoom speed command signal calculation means 3, 12, 14, 25, 36 A / D conversion means 4, 39 CPU
5, 18, 29 D / A conversion means 6 Zoom control signal calculation means 7 Zoom power amplification means 8 Zoom motor 9 Zoom lens optical system 10 Zoom absolute position signal detection means 11 Zoom absolute position signal calculation means 13 Zoom switch speed variable volume position Signal calculation means 15 Zoom demand section 16 Zoom demand operation section 17 Zoom demand counter 19 Focus control signal calculation means 20 Focus power calculation means 21 Focus motor 22 Focus lens optical system 23 Focus absolute position signal detection means 24 Focus absolute position signal calculation means 30 Iris control signal calculation means 31 Iris power amplification means 32 Iris motor 33 Iris mechanism 34 Iris absolute position signal detection means 35 Iris absolute position signal calculation means 37 Lens information display section 38 Developmental memory 40 CCD
41 Video Signal Processing Unit 42 Video Signal Recording / Reproducing Unit 43 Video Signal Display Unit 44 Reference Voltage Generation Unit 45 Power Supply Switching Unit 46 Power Supply Unit 47 Zoom Relative Position Signal Detection Unit 48 Zoom Origin Detection Unit 49 Focus Relative Position Signal Detection Unit 50 Focus origin detection means 51 Iris relative position signal detection means 52 Iris origin detection means 53 Non-volatile storage section 54 Initialization end command value setting means 100 Lens barrel 101 Focus electronic ring 102 Zoom ring 103 Iris ring 104 Drive unit 104
105 Zoom Switch 106 Iris Electric / Manual Switch 107 Camera Cable 108 Zoom Switch Speed Variable Volume 109 Zoom Clutch 110 Focus Clutch

Claims (19)

A lens device comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detection means, and performing relative position control and manual drive control of the optical element,
After the power is turned on, a signal indicating that the absolute position signal of the optical element is invalid is transmitted to the camera apparatus before initialization for initializing the absolute position of the optical element by manual drive control is completed. A lens device. A lens device comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detection means, and performing relative position control and manual drive control of the optical element,
The lens apparatus is characterized in that after the power is turned on, before the initialization for initializing the absolute position of the optical element by manual drive control is completed, the absolute position signal of the optical element is not transmitted to the camera apparatus. A lens device comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detection means, and performing relative position control and manual drive control of the optical element,
Furthermore, the storage means for storing the absolute position of the optical element before the power is turned off,
After the power is turned on, before the initialization for initializing the absolute position of the optical element by manual drive control is completed, the absolute position signal of the optical element stored before the power is turned off is transmitted to the camera device. Lens device to do.   The lens apparatus according to claim 1, wherein after the initialization is completed, an absolute position signal after the initialization is completed is transmitted to the camera apparatus. A lens device comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detection means, and performing relative position control and manual drive control of the optical element,
Furthermore, the storage means for storing the absolute position of the optical element before the power is turned off,
After the power is turned on, if the absolute position of the optical element is initialized by manual drive control before the initialization is completed, the absolute position of the optical element stored before the power is turned off A lens apparatus comprising control means for performing relative position control as an absolute position after being thrown in.   6. The lens apparatus according to claim 5, wherein after the initialization is completed, relative position control is performed using the absolute position after the initialization is completed.   When switching to relative position control after initialization to complete initialization of the absolute position of the optical element by manual drive control after turning on the power, the relative position of the optical element is not changed until the initialization is completed. 6. The lens apparatus according to claim 5, further comprising control means for setting a position control drive speed within a speed range smaller than a maximum speed of the lens apparatus.   If the optical element is switched to the relative position control after the power is turned on and the initialization of the absolute position of the optical element by manual drive control is completed, the optical element is driven until the initialization is completed. The lens apparatus according to claim 6, further comprising a control unit configured to set a driving speed of the relative position control of the optical element within a speed range smaller than a maximum speed of the lens apparatus when driven in the end direction. A lens device comprising an optical element, a manual operation means for manually driving the optical element, and a relative position detection means, and performing relative position control and manual drive control of the optical element,
After the power is turned on, until the initialization for initializing the absolute position of the optical element by manual drive control is completed, the drive speed of the relative position control of the optical element is within a speed range smaller than the maximum speed of the lens device. A lens device comprising control means for performing   10. The lens device according to claim 1, wherein when the power is turned off, the absolute position of the optical element is stored in the nonvolatile storage unit before the voltage level of the power supply becomes zero.   The lens device according to claim 1, further comprising a small battery, wherein the absolute position of the optical element is stored in the nonvolatile storage unit by the small battery when the power is turned off.   The lens device according to claim 1, wherein the absolute position of the optical element is stored in a nonvolatile storage unit at predetermined time intervals during the relative position control.   When the power is turned off, the absolute position of the optical element is transmitted to the nonvolatile storage unit by transmitting a comment signal for storing the absolute position of the optical element from the camera device to the lens device before the voltage level of the power supply becomes zero. The lens device according to claim 1, wherein the lens device is stored.   The lens device according to claim 1, wherein the optical element is a zoom lens, a focus lens, or an iris.   The lens apparatus according to claim 1, further comprising an absolute position control system that performs absolute position control of the optical element in addition to the relative position control system that performs the relative position control.   An imaging device comprising: the lens device according to claim 1; and a camera device attached to the lens device. A lens device comprising an optical element, a manual operation means for manually driving the optical element, an absolute position detecting means, and a relative position detecting means, and performing relative position control and manual drive control of the optical element,
A lens apparatus, wherein the absolute position of the optical element is initialized after power is turned on using the relative position detection means and the absolute position detection means.   The lens apparatus according to claim 17, wherein the optical element is a zoom lens, a focus lens, or an iris.   An imaging device comprising: the lens device according to claim 17 or 18; and a camera device attached to the lens device.

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