JPH06233170A - Remote controlling device for television camera - Google Patents

Abstract

PURPOSE:To improve portability, operability, etc., and also, to reduce the cost by executing selectively remote control of a iris, a focus and a zoom of a television camera by one control device. CONSTITUTION:A changeover switch 14 is connected to a potentiometer 18, and switches and outputs selectively remote control circuit signals 17a, 17b and 17c of an iris, a focus and a zoom. When the remote control circuit signals 17a, 17b and 17c are switched selectively by the changeover switch 14, a data storage element 20 stores a control state being before switching. A conversion arithmetic circuit 21 fetches a zoom position signal from a lens servo-unit 5 side by a zoom position signal 17d, and executes position control of a speed control circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device for a television camera, and more particularly to a remote control device for a lens used in a small television camera.

[0002]

2. Description of the Related Art Conventionally, as a control device for a small television camera used for news gathering, for example, a television camera aperture operating device disclosed in Japanese Utility Model Publication No. 58-172269 is known. This is designed to allow a cameraman to freely adjust the aperture amount of a lens by a manual operation. As shown in FIG. 4, a reference voltage generating circuit 1 and a manual operation potentiometer 2 for generating an aperture control signal by the manual operation. Aperture control device 3 provided with
Is connected to the lens servo unit 5 of the camera 4 via a changeover switch 6 for selectively selecting an aperture control signal by a video signal from the camera 4 and an aperture control signal by the reference voltage generation circuit 1, and the potentiometer is connected. The camera 2 is designed so that a cameraman can operate it at hand. Reference numeral 7 denotes a CCU (camera control unit) connected to the camera 4 via a cable 8. The CCU 7 includes a remote aperture mechanism called a remote iris mechanism, which is used for color matching with other TV cameras, brightness, and other programs. We are making adjustments to the items necessary to make them. In addition to the diaphragm operating device 3, the lens servo unit 5 is connected to a focus demand and a zoom demand (not shown) that are configured in a substantially similar manner and that remotely control focus and zoom by manual operation.

[0003]

A remote control of a lens used in a small television camera requires a camera control unit, an aperture operating device 3, a zoom demand or a focus demand. The camera control unit contains many functions related to camera setup, etc.If you just want to make fine adjustments to the iris, for example, when shooting a person's face in the auto iris mode, part of the face may be haloed depending on the background. This is unsuitable for when you want to easily adjust the aperture by remote control when you feel like it, and it is large and heavy. Mode control using zoom demand or focus demand is complicated in a narrow shooting place and when two types of controllers are required. Also,
Depending on the shooting, an operator may be attached to the camera in addition to the cameraman to assist the lens operation, but it is difficult to operate in a narrow space, and if the sharing of operations with the cameraman may change depending on the situation, several types of demand may occur. Have to prepare. The zoom control is usually performed by a speed control circuit and is built in the lens grip. However, there is a problem that the response speed is slow when it is desired to change the angle of view subtly.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to selectively perform remote control of iris, focus, and zoom with one device. Another object of the present invention is to provide a remote control device for a television camera, which can improve the operability, the portability, and the like, and also reduce the cost.

[0005]

In order to achieve the above object, a remote control device for a television camera according to a first aspect of the present invention includes a single manual operation for generating output signals for remotely controlling iris, focus and zoom. The operation potentiometer and a changeover switch for selectively changing and connecting the iris, focus, and zoom remote control circuits to the potentiometer are provided and are connected to the lens servo unit for the television camera. In a second aspect based on the first aspect, the zoom remote control circuit includes a conversion arithmetic circuit for position control of the speed control circuit of the television camera lens servo unit. In a third aspect based on the first or second aspect, each of the iris, focus, and zoom remote control circuits includes a data storage element that maintains a control output signal before switching by the changeover switch. .

[0006]

[Function] The potentiometer consists of iris, focus,
Generates an output signal for remotely controlling the zoom.
The changeover switch selectively switches and connects the iris, focus, and zoom remote control circuits to the potentiometer. The conversion arithmetic circuit of the zoom remote control circuit controls the position of the speed control circuit. The data storage element of each remote control circuit stores the control output signal before switching when the iris, focus, or zoom is selectively switched by the changeover switch, and maintains the previous operation system as it is.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of a television camera provided with a remote control device according to the present invention. In the figure, the same components as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted. In the figure, reference numeral 10 is a remote control device which is connected to the lens servo unit 5 of the television camera 4 via a cable 11 and a connector 12 to selectively remotely control the iris, focus and zoom of the lens.

FIG. 2 is an external view of the remote control device 10, and FIG. 3 is an electric circuit diagram of the device. In these figures, the remote control device 10 has a case 13
The case 13 is provided with two changeover switches 14 and 15 manually operated by a cameraman and a dial 16 on the surface of the case 13. The changeover switch 14 is a switch for selectively switching and outputting the iris, focus, and zoom remote control circuit signals 17 a, 17 b, and 17 c incorporated in the case 13, and is connected to the manual operation potentiometer 18. . The change-over switch 15 is a switch that switches between an iris control signal from the remote control device 10 and an iris control signal from the camera 4, and can switch from remote operation by the remote control device 10 to normal iris operation instantly. Of course, it is needless to say that the normal servo operation is performed when the remote control device 10 is not connected. The dial 16 is the potentiometer 1 described above.
It is connected to 8 shafts. The potentiometer 18 is for generating an output signal for remotely controlling the iris, focus, and zoom.
The resistance value is changed by the manual operation of. The output signal from the potentiometer 18 is amplified by the amplifier 19, and then the remote control circuit signals 17a, 17b, 17 are generated.
Any one of iris, focus, and zoom can be selected by selectively switching c by the changeover switch 14.
It is output to the lens servo unit 5 as a control signal for controlling the two. When the iris remote control circuit signal 17a is selected, the automatic iris mechanism of the lens unit is driven and controlled. Also, the iris, focus and zoom remote control circuit signals 17a, 17b, 17c.
Need to maintain the control state of the servo before switching even when switched to another control by the changeover switch 14, each is equipped with a data storage element 20, so that even if switched to another control, the previous operation system Can be held in place. However, with regard to zooming, the speed is usually configured on the lens side, so
In order to perform the position control, the zoom position signal is fetched from the lens servo unit 5 side by the zoom position signal 17d and the zoom position control is performed by the conversion arithmetic circuit 21.

Thus, in the remote control device 10 having such a structure, the iris, focus and zoom can be selectively remote-controlled by manually operating only one potentiometer 18 and the changeover switches 14 and 15. Also, each remote control circuit signal 1
Since 7a, 17b, and 17c are connected to the data storage element 20, even if the remote control is switched by the changeover switch 14, the state before the switching can be well maintained. Furthermore, the zoom remote control circuit signal 17c
Is converted by the conversion control circuit 21 to control the position of the speed control circuit in the lens, the response speed is fast,
Even if the angle of view is changed slightly, it can be changed quickly.

[0010]

As described above, according to the remote control device for a television camera of the present invention, the iris, focus, and zoom can be selectively remote-controlled with a simple structure. It is not necessary to connect a demand, and it is possible to improve operability, portability, etc., and achieve cost reduction. Further, in the present invention, since the data storage element is incorporated in each remote control circuit, the state before the switching can be retained even if the remote control is switched by the changeover switch. Since the position of the speed control circuit is controlled by the arithmetic circuit, the response speed can be increased.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a television camera provided with a remote control device according to the present invention.

FIG. 2 is an external view of a remote control device.

FIG. 3 is an electric circuit diagram of the device.

FIG. 4 is a schematic configuration diagram showing a conventional example of a television camera.

[Explanation of symbols]

 1 Reference voltage generating circuit 2 Potentiometer 3 Aperture operating device 4 Camera 5 Camera servo unit 6 Changeover switch 7 Camera control unit 10 Control device 14 Changeover switch 15 Changeover switch 16 Dial 17a, 17b, 17c Remote control circuit signal 17d Zoom position signal 18 Potentiometer 19 amplifier circuit 20 data storage element 21 conversion arithmetic circuit

Claims (3)

[Claims] 1. A potentiometer for manual operation for generating an output signal for remotely controlling iris, focus, and zoom, and a switch for selectively connecting and connecting the remote control circuits for iris, focus, and zoom to the potentiometer. A remote control device for a television camera, comprising a switch and being connected to a lens servo unit for the television camera. 2. The remote control device for a television camera according to claim 1, wherein the zoom remote control circuit includes a conversion arithmetic circuit for positionally controlling the speed control circuit of the lens servo unit for the television camera. The remote control device for the featured TV camera. 3. The remote control device for a television camera according to claim 1, wherein each of the iris, focus, and zoom remote control circuits includes a data storage element that maintains a control output signal before switching by the changeover switch. The remote control device for the TV camera.