JPH0748818B2 - Control box for TV lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a control for enabling a lens for a television camera (hereinafter referred to as a TV lens) to be adjusted to a predetermined zooming position and focusing position with one touch. It's about boxes.

[Conventional technology]

In a television camera, particularly in a television camera for a studio, since the position of an imaged subject is almost fixed, the camera is often installed and used.
Moreover, several cameras are used at different angles at the same time, and each cameraman takes images while switching the shot screen, zoom ratio, etc. in response to a request from the conductor.

Against this background, control boxes have recently been used to simplify the zooming operation of TV lenses. The control box includes an adjustment setting unit for setting a plurality of zooming positions, and a selection operation unit for selecting a predetermined zooming position from the plurality of zooming positions thus set, and the TV lens Used with a servo module that automatically drives the servo motor. Then, after setting multiple zooming positions, the TV lens is automatically adjusted to the corresponding zooming position by selecting and pressing a predetermined one from the keys arranged as the selection operation unit in the control box. Become so.

[Problems to be solved by the invention]

The conventional control box used for such a purpose is provided with only a few setting operation parts at most, and has a functionally insufficient surface when actually used. For example, when using a TV lens equipped with an extender that is automatically inserted into and removed from the imaging optical path by the servo module, the above-mentioned several positions will be doubled as the zooming position. It becomes impossible to set with only a few setting operation parts. Furthermore, in addition to zooming, when trying to automatically adjust focusing in parallel with this, the above-mentioned several setting operation parts must be used separately for zooming position setting and focusing position setting. Inevitably, the set number of zooming positions tends to be insufficient.

Such an inconvenience can be solved simply by adding a setting operation unit of the control box. However, if the setting operation unit is simply added in this way, the selection operation unit must be added in the same way in response to this, and an increase in the size of the control box is unavoidable, and at the same time the selection operation unit cannot be selected. The arrangement of keys as the operation unit is increased, and operability becomes difficult.

The present invention has been made in view of such circumstances, and while increasing the number of optical adjustment positions to be set such as a zooming position and a focusing position to save space for the setting operation unit, the selection operation unit is It is an object of the present invention to provide a control box for a TV lens that is compact and has good operability by avoiding simple addition.

[Means for Solving the Problems] In order to achieve the above object, the present invention arranges a plurality of double dials in which an inner dial and an outer dial are independently rotatable and makes a basic operation. In the mode, it is possible to set the zooming position on one of the inner and outer dials and the focusing position on the other, and when pressing one push button adjacent to each double dial, it is adjacent to that push button. The TV lens with the selected zooming and focusing positions set by the double dial is adjusted.
The control box of the present invention is provided with a mode selection means so that the zooming position can be set more finely, and the mode selection means is used to set the focusing position of the double dial by switching the mode selection means. The other dial can also be used to set the zooming position. In addition, when the zooming position is set by each of the inner and outer dials, the function operation is made to be able to alternately switch which dial is used to select the zooming position when the push button is operated. Parts are provided.

An embodiment of the present invention will be described below with reference to the drawings.

〔Example〕

Referring to FIG. 4 showing an example of a use state of the control box of the present invention, a television camera 2 for studio
The TV camera 2 (hereinafter referred to as the TV camera 2) is attached to the support base 3 with casters, but since the position of the subject rarely changes in the studio, it is used in a substantially fixed position. However, in the figure, the two-dot chain line A, B,
As indicated by C, the TV camera 2 is subjected to panning operation (horizontal shaking operation) and tilting operation (vertical shaking operation) in order to switch the shot screens appropriately. Because the subject distance also changes with such operations,
Concomitant with this, the TV lens 5 mounted on the TV camera 2 requires focusing and zooming.

In order to enable quick and smooth operations for focusing and zooming, the TV lens 5
The servo module 6 is attached to the. The servo module 6 is composed of a servo motor, a servo drive circuit, a drive gear that meshes with the zoom ring and the focusing ring of the TV lens 5, and the TV lens 5 is automatically driven for focusing and zooming according to an electric signal input. It is for doing.

A pair of grip rods 7 and 8 are provided on the platform provided on the support base 3 for panning and tilting the TV camera 2. The control box 10 according to the present invention is attached to the one grip rod 7. On the other hand, the other grip rod 8 uses a knob 11 for manual zooming to enable manual zooming operation in addition to zooming using the control box 10 and an extender built in the TV lens 5. A snap switch 12 that is sometimes operated is provided. Knob 11 is biased to a neutral position that stops zooming. Then, when it is rotated to one side, the TV lens 5 is zoomed to the tele side, and when it is rotated to the other side, it is zoomed to the wide side, and the zooming speed is changed according to the amount of rotation thereof. Note that these knobs 1
1, the signal from which the snap switch 12 is operated is input to the servo module 6 via the control box 10.

1 and 2 showing the front panel and side surface of the control box 10, the control box 10
Is fixed to the clamp plate 22 attached to the grip rod 7 by tightening the attachment knob 21. Double dials 24, 25, 26, 27, 28, 29, 30 are provided on the panel surface of the control box 10. Each of these double dials includes an inner dial 24a, 25a, ... And an outer dial 24b, 25b ,.
.. and are provided.

Shot buttons 31 and 3 with numbers "1", "2", ... are attached so as to be adjacent to the right side of the double dials 24 to 29.
2, 33, 34, 35, 36 are arranged, and a function button 37 is arranged beside the double dial 30. The inner dial 30a of the double dial 30 is used for adjusting the zoom speed, and the outer dial 30b is used for adjusting the focus speed. Also, at the bottom of the panel surface, for display
LEDs 41, 42, 43 are provided. These LEDs 41-43 are
It is used to display which mode is selected by the mode select switch 45. Further, a focus control knob 46 is provided on the right side of the panel surface of the control box 10. This knob 46
Is used when the focus of the TV lens 5 is manually adjusted.

FIG. 3 shows an example of a circuit configuration used for the control box 10 described above. With reference to FIG. 3 below, an automatic setting mode for focusing and zooming (hereinafter, referred to as F
& Z mode), automatic zooming setting mode including extender (hereinafter referred to as Z & Z (x2) mode), automatic zooming setting mode not including extender (hereinafter referred to as Z & Z mode), and the above control for each mode. The operation of the box 10 will be described.

(A) "F &Z" mode Set the mode select switch 45 to the "F &Z" index position. Thus, when an instantaneous H signal is input to the encoder 50 line, an H signal appears on the decoder 51 line and the H signal is held as it is. decoder
When the line 51 becomes the H signal level, the analog switches S1, S2, S3 are connected to the “◯ − ◯” side. The analog switch used in FIG. 3 is connected on the “◯ − ◯” side when the gate is the H signal, and is connected on the “● − ◯” side in other cases.

When the knob 11 is turned by connecting the analog switch S1 to "○-○", the signal detection circuit
The rotation direction and the rotation amount are detected by 53, and these are input to the driver 54 incorporated in the servo module 6. As a result, the zoom ring driving motor 55 rotates to perform zooming. That is, in this state the knob
11. Manual zooming will be possible. When the focus control knob 46 is operated, the signal detection circuit 56 outputs the operation amount as an electric signal. This signal is supplied to the driver 57 of the servo module 6 via the analog switch S3, and the focus ring of the TV lens 5 is driven via the motor 58. Therefore, this allows manual focusing.

In order to automatically move the TV lens 5 to a predetermined zooming position and focusing position, the following set operation is performed. First, an arbitrary shot button, for example, the shot button 31 is pressed. This allows the shot button 31
The switch B1 corresponding to is turned on, the H signal appears on the line of the decoder 51 by this instantaneous ON signal, and the line becomes the L signal, and this state is held. Therefore, the analog switches S1, S2, and S3 are each
Connected to the side. Further, the H signal on the line is also supplied to the switch units 63 and 64. Switch unit 63, 64
Is the inner dial 24a, 25a of the double dial 24-29 ..
, And a group of switches provided for each number corresponding to the outer dials 24b, 25b, ... And a gate corresponding to the number of output terminals from the decoder 51. Only the switch corresponding to the output end is turned on. In this case, since the H signal is output to the line, the switches 63a and 64a are turned on.

When the switches 63a and 64a are turned on, the voltage value according to the resistance value of the resistor 65a which is changed by the inner dial 24a is input to the comparison circuit 68 via the analog switch S4 (“● − ◯” connection). The comparison circuit 68 compares the signal thus input with the signal fed back from the position detector 69 that detects the position of the zoom ring, detects the difference in magnitude, and has a polarity corresponding to the difference. Output a signal.
Then, this output is supplied to the speed adjustment circuit 70 and the signal detection circuit 71.

The speed adjustment circuit 70 outputs a zoom signal having the polarity of the input signal and the voltage value corresponding to the resistance value set by the inner dial 30a of the double dial 30, which is output via the analog switch S1 to the driver. Supplied to 54.
As a result, the motor 54 is driven by the driver 54, the zoom ring rotates, and zooming is performed. The rotational position of this zoom ring is detected by the position detector 69,
This position signal is fed back to the comparison circuit 68. Then, when the comparison circuit 68 detects that the voltage value corresponding to the resistance value obtained from the position detector 69 matches the voltage value corresponding to the resistance value of the resistor 65a, a comparison signal is output from the comparison circuit 68. Then, the motor 55 is stopped and the zooming operation is completed. The zooming position thus obtained is determined by the value of the resistance 65a, that is, the setting position of the inner dial 24a. Therefore,
While observing the monitor image with the TV camera 2, an appropriate zooming position can be set with the inner dial 24a.

On the other hand, when the outer dial 24b is rotated to change the resistance value of the resistor 66a, the voltage value corresponding to this resistance value is input to the comparison circuit 62 via the analog switch S2 ("●-○" connection). At the same time, the signal in which the switch 64a is turned on is input to the driver 57 via the speed adjusting circuit 73 and the analog switch S3. The speed adjustment circuit 73 outputs a voltage signal corresponding to the resistance value varied by the outer dial 30b of the double dial 30, and this is supplied to the driver 57. driver
57 motor 5 at speed adjusted by inner dial 30b
8 drives the focus ring to rotate and
Focusing of the lens 5 is performed, and the focus ring rotates to a position corresponding to the voltage signal from the speed adjusting circuit 73 and stops.

The above procedure can be performed in the same manner for the other shot buttons 32, 33 ..., And by using the corresponding dual dials 25, 26, 27 ..., a total of 6 zooming positions and focusings can be performed. It is possible to set the position. After presetting the zooming position and focusing position in this way, press the mode select switch.
If 45 is set to the "F &Z" position, the shot button
By selecting an appropriate one from 31 to 36 and pressing it, the TV lens 5 is automatically set to the zooming position and the focusing position set by the double dial adjacent to the shot button. Therefore, for example, when performing a rehearsal, if the zooming position and the focusing position are preset for each shot screen of the TV camera 2, the zooming and focusing can be quickly performed only by selecting the shot button at the time of actual production.

The LED driver 75 and the pulse generator 76 are provided to drive one LED 77 embedded in each of the shot buttons 31 to 36, and the TV lens 2 is preset by pressing a predetermined shot button. Zoom in position,
Until focusing is performed, the LED 77 corresponding to the shot button is made to blink, and when zooming and focusing are completed, the LED 77 is continuously turned on to display the operation state. That is, the TV is set at the set zooming position.
In the process of setting the lens 5, the coincidence signal is not output from the comparison circuit 68, so this state is detected by the signal detection circuit.
It is monitored by 71 to activate the pulse generator 76, which causes the LED 77 to blink. Then, when the coincidence signal is output from the comparison circuit 68, the pulse generator 76 is turned off so that the LED 77 is continuously turned on.

On the other hand, even during the focusing process, the outer dial
The voltage value according to the resistance value set in 24b and the position detector 6
When the voltage value from 0 does not match, the comparison circuit 6
2, the pulse generator 76 is operated via the signal detection circuit 63 and the analog switch S8, and the LED 77 is similarly driven to blink. In addition, when the above "F &Z" mode is set, LED4
1 lights up and the mode setting status is displayed.

To cancel the "F &Z" mode, the manual zoom knob 11 is momentarily operated or the function button 37 is momentarily pressed. When the signal detection circuit 53 detects that the knob 11 is momentarily operated, or when the function button 37 is detected, a pulse input is added to the line of the encoder 50, and as a result, as described above. To the decoder 51 line
A signal appears, and both zooming and focusing are reset to manual mode. When this reset operation is performed, the analog switch S3 is connected to "○-○" to invalidate the focusing position set by the outer dial 24b, and the TV lens 5 is moved to the focusing position by the knob 46. It is automatically refocused. In order to eliminate such inconvenience, the knob 46 is rotationally adjusted before the reset operation, and the comparator circuit 67 adjusts the voltage value according to the resistance value from the outer dial 24b and the resistance value from the knob 46. It is sufficient to match the voltage value that has been set. In order to identify that the two match, an LED 78 is embedded in the function button 37, and by the match signal from the comparison circuit 67,
This is to be turned on.

(B) "Z & Z (x2)" mode Set the mode select switch 45 to the "Z & Z (x2)" index position. As a result, the analog switches S5 and S
6, S4, S7, S8, S2, S3, and further, the analog switch S9 is connected via the terminal "b". In this state, when the snap switch 12 is set to the "x1" side, the extender built in the TV lens 5 is not used, and the analog switch S10 remains connected to the "●-○" side. ing. Therefore, the voltage value according to the resistance value set by the inner dial 24a is
It is input to the comparison circuit 68 via S10, and zooming is performed by comparison with the voltage value from the position detector 69. That is, with the snap switch 12 set to the “× 1” side, six zooming positions can be set.

When the snap switch 12 is set to the “× 2” side, the extender built in the TV lens 5 is inserted into the imaging optical path, and at the same time, the H signal from the snap switch 12 causes the analog switch S10 to move to the “○-○” side. Connected to. As a result, the voltage value set by the switch unit 63 side, that is, the inner dial is not input to the comparison circuit 68, and instead of this, the switch unit 64 is replaced.
The voltage value corresponding to the set position of the side, that is, the outer dial, is input to the comparison circuit 68.

As is clear from the above, TVs that use an extender together
For the lens 5, six zooming positions are set by the inner dials 24a, 25a ... Without an extender, and six zooming positions are set by the outer dials 24b, 25b. You can set the zooming position. Then set the snap switch 12 to the "x1" side and press the shot buttons 31-36.
The TV lens 5 is automatically set to the zooming position when there is no extender, and the snap switch 12 is set to the “× 2” side and the shot buttons 31 to 36 are pressed to automatically set the zooming position using the extender. Also, LED7
The display operation by 7 is the same as in the above-mentioned "F &Z" mode.

In addition, set the mode select switch 45 to "Z & Z (x2)".
LED42 lights up to display the mode, and when set to “× 2” of the snap switch 12, the LED embedded in the function button 37 lights up, indicating that the extender is being used. indicate. When releasing the "Z & Z (× 2)" mode, the manual zoom knob 11 may be instantaneously operated in the same manner as the above-mentioned "F &Z" mode releasing operation.

(C) "Z &Z" mode Set the mode select switch 45 to the "Z &Z" position. As a result, the LED 43 lights up to display the mode, and the analog switches S5, S6, S4, S7, S8, S2, S3 are connected in "○-○" as in the "Z & Z (× 2)" mode. However, the terminal b remains the L signal, and therefore the analog switch S9 is in the "●-○" connection. In this mode, by connecting the analog switch S10 to "●-○", the voltage value according to the resistance value adjusted by the inner dial 24a can be input to the comparison circuit 68, and the analog switch S10 can be switched to "○-○". It becomes possible to input the voltage value corresponding to the set position of the outer dial 24b to the comparison circuit 68 by switching to the "○" connection. Therefore, when each analog switch S10 is connected, 6
You can set a total of 12 zooming positions, one at a time, and perform automatic zooming.

The function button 37 is used to switch the analog switch S10 in this manner. After the function button 37, the flip-flop circuit 79
Is connected, the output of the flip-flop circuit 79 changes between the H signal and the L signal each time the function button 37 is pressed. And this signal is an analog switch
Since it is added to the gate of the analog switch S10 through S9, each time the function button 37 is pressed, the connection of the analog switch S10 is alternately switched between "●-○" and "○-○". That is, the function button 37 functions as a page switching button.

The cancellation of the "Z &Z" mode and the display of the operating state by the LED 77 are the same as those in the above-mentioned "Z & Z (x2)" mode.

As described above, as apparent from the description of the illustrated embodiment, if the control box 10 is used, not only the automatic setting of zooming but also the automatic setting mode of zooming and focusing, or the automatic setting mode of zooming including the extender is performed. It can be appropriately switched and used. Therefore, for example, in consideration of the selection of the shot screens A, B, C, ... Shown in FIG. 4 and the specifications of the TV lens 5 to be used, “F & Z”, “Z & Z (× 2)” ,.
It is possible to select and use the optimum mode from each mode of & Z ”, which is very useful when used in a limited range such as in a studio.

〔The invention's effect〕

As described above, in the control box for the TV camera of the present invention, in the basic operation mode, the zooming position and the focusing position are paired and set with the double dial,
A function to quickly perform zooming and focusing of the TV lens can be obtained by pressing the push button, and at the same time, if you want to preset the zooming position in more detail, you can switch the mode selection means to set the focusing position. The dial used can be used for setting the zooming position. Then, when the zooming position is set using the inside and outside dials of the double dial, the function operating section is appropriately operated to freely select the zooming position set by either the inside or outside dial. Will be able to. Therefore, setting up shot screens and
The function can be selected according to the features of the TV lens, and at the same time, a compact and easy-to-use control box can be realized, which is very effective for quick and smooth operation of the TV camera.

[Brief description of drawings]

FIG. 1 is a front view of the control box of the present invention. FIG. 2 is a side view of the control box shown in FIG. FIG. 3 is a circuit block diagram showing an outline of a circuit configuration used for the control box of the present invention. FIG. 4 is a schematic view showing an example of a usage pattern of the control box of the present invention. 2 …… TV camera 5 …… TV lens 6 …… Servo module 10 …… Control box 11 …… Knob (for manual zoom) 12 …… Snap switch 24 ～ 29 …… Double dial 31 ～ 36 …… Shot button 37 ...... Function button 45 …… Mode select switch 46 …… Knob (for manual focus) 63 …… Switch unit (for inner dial) 64 …… Switch unit (for outer dial) 65a, 66a …… Variable resistance.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-219875 (JP, A) JP-A-61-178755 (JP, A) Actually developed JP-A-56-172065 (JP, U)

Claims (1)

[Claims] 1. A plurality of zooming positions and focusing positions of a TV lens can be set in advance, and a zooming position and a focusing position selected from them can be set.
In a TV lens control box that outputs a signal for adjusting a TV lens, an inner dial and an outer dial that are independently rotatable to set a plurality of zooming positions and focusing positions in advance. Consists of multiple dials, one of which is used for zooming position setting and the other of which is used for focusing position setting, and one of them is arranged adjacent to each of these double dials. A plurality of push buttons that are operated when selecting the set zooming position and focusing position and the operation mode of the other dial used for setting the focusing position of the inner dial and the outer dial are changed. With mode selection means that can set the zooming position by the other dial When the operation mode is changed by the mode selection means and the zooming positions are set by the inner and outer dials, the zooming position set by either the inner dial or the outer dial is selected when the push button is pressed. A control box for a TV lens, which is equipped with a function operation unit that allows the user to switch between the two.