JPS60111578A - Swiveling-direction display device for television camera - Google Patents

Abstract

PURPOSE:To combine an external picture and direction display optically and to simplify device constitution by providing a semitransparent mirror on the front side in the image-pickup direction of a television camera main body intersecting the image-pickup direction, and by arranging a direction display means in the symmetrical position to the camera main body with respect to the semitransparent mirror. CONSTITUTION:A camera head part 3 of a television camera 1 is installed on a universal head 2 rotatively. A direction display means 10 which is composed of a television camera main body 5, a camera lens 6, a semitransparent mirror 7, a condenser lens 8 and a compass 9 is stored in a case 4 of the head part 3. A television monitor 12 is connected to the camera main body 5 through an image signal transmission path 11. The semitransparent mirror 7 at the inside of the case 4 is arranged intersectingly at the angle of 45 deg. with respect to the image-pickup direction A of the camera main body 5, the display means 10 is arranged right under the semitransparent mirror 7, and the means is positioned symmetrically at the same angle with respect to the camera main body 5 and the semitransparent mirror 7. The external picture and the direction display are combined optically, and the constitution of the swiveling direction display is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a turning direction display device for a television camera, and particularly to a turning direction display device for a television camera which is convenient for use in a surveillance CCTV system.

<Prior Art and Problems> A conventional rotation direction display device for a television camera of this type has a rotation direction indicator on the rotation axis of the pan head to which the television camera is attached.
A potentiometer or synchro transmitter that is linked to the movement of this turning axis is installed to detect the turning angle, and the detection signal is sent to the A/
Some data is converted into D and transmitted to a monitoring center, etc. Then, on the center side, when the receiver detects the information on the turning angle obtained by the above device, it drives the character signal generator.
It electrically mixes the image captured by the television camera and displays it on the screen of the television monitor.

However, such a conventional turning direction display device for a television camera has the problem that the necessary equipment is a big loss and the system requires a large amount of money to configure and operate. .

<Object of the Invention> An object of the present invention is to solve the above-mentioned conventional problems and provide an economical turning direction display device for a television camera that can optically synthesize a captured image and a turning direction display signal. thing! There is lc.

<Structure of the Invention> The turning direction display device for a television camera according to the present invention includes a semi-transparent mirror that intersects with the imaging direction on the front side of the television camera body in the imaging direction, and a semi-transparent mirror that intersects with the imaging direction. In this device, a direction display means is disposed at a position symmetrical to the camera body, and a captured image and an image displayed by the direction display means indicating the turning direction are captured as an optical composite image.

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

FIG. 1 is an explanatory diagram showing an embodiment of a turning direction display device for a television camera according to the present invention, and FIG.
(1) It is an explanatory diagram showing a display example of the l-11 direction display means.

Referring to FIG. 1, a television camera 1 has a camera head section 3 rotatably mounted on a pan head 2, and the camera head section 3 includes a television camera body 5 and a camera lens 6 inside a casing 4. , semi-transparent mirror 7, and condensing lens 8
and a compass 9. The television camera body 5 is connected to a television monitor 12 via a video signal transmission line 11.

The semi-transparent mirror 7 is provided so as to intersect with the imaging direction of the television camera body 5 (direction of arrow A in the figure) at an angle of 45 degrees as shown. The direction display means 10 is disposed directly below the semi-transparent mirror 7, and its position is symmetrical to the television camera main body 5, making the same angle with respect to the semi-transparent mirror 7.

The compass 9 of the direction display means 10 is a magnetic compass in the illustrated example. However, it goes without saying that other types can also be used. The display contents of the compass 9 are as shown in FIGS. 2(a) to 2(d), for example.

Figure 2 (a) shows the directions as follows: ■, west (W), 'F@
(S), which is written in inverted letters with north (he), appears on the screen of the television monitor 12 as shown in FIG. 2(b). In addition, the cover 14 of the window 13 is used in place of the pointer, and only when the rotation direction of the television camera 1 faces in a certain direction, "
It is designed so that displays such as ``up'' and ``down'' appear. In this case, the screen of the television monitor 12 is shown in Fig. 2 (
It will become like a mountain.

Next, a case where the television camera 1 is rotated will be explained. The pointer of the compass 9 always points in a constant direction even if the entire camera housing 4 is turned by the pan head 2. Also, the television camera body 5 includes a semi-transparent mirror 7 and a compass 9 that is reflected in K.
The display state and the external monitoring image seen through the semi-transparent mirror 7 are simultaneously captured. Therefore, TV monitor 1 on the receiving side
On the screen No. 2, the monitoring image captured by the television camera body 5 and the turning direction display are simultaneously optically combined and displayed.

In addition, in order to optically combine the monitoring image and the turning direction display, unnecessary parts other than the pointer and letters of the compass 9 are made black, and the fonts of the two symbols used here are reversed. Of course, consideration must be given to

Furthermore, if it is not necessary to display the direction on the screen of the television monitor 12 after setting the imaging direction A of the television camera 1, the semi-transparent mirror 7 may be made movable, or the display surface of the compass 9 may be provided with a shutter. , the display of the turning direction can be erased from the screen of the television monitor 12. If these controls are linked to the rotational movement of the pan head 2, no new transmission line is required between the operation section and the camera.

<Effects of the Invention> As explained above, the present invention has a configuration in which the J, 'tIk
A semi-transparent mirror is provided to intersect with the image direction, and the direction display means is arranged in a position symmetrical to the television camera body with respect to the semi-transparent mirror, so that the external image and the direction display are optically combined and imaged at the same time. As a result, there is no need for conventional electrical image synthesis means, and an excellent effect can be obtained in that the cost of the entire device and system can be significantly reduced.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing one embodiment of the present invention, Fig. 2(a)
-(d) are explanatory diagrams showing display examples of the direction display means. 1... Television camera 5... Television camera body 7... Semi-transparent mirror 9... Compass 10... Direction display means 12... Television monitor A... Imaging direction Applicant NEC Corporation Company Diagram 2 (0) E \ between (c) (b) (d)

Claims (1)

[Claims] A semi-transparent mirror that faces and intersects in the imaging direction is provided on the front side of the television camera body in the imaging direction, and a direction display means is arranged on the semi-transparent mirror at a position symmetrical to the television camera body. Turning direction display device.