| 摘要 |
PURPOSE:To make a large-scale transmitting and receiving device, etc. unnecessary by providing a zoom lens on a television camera, and operating the zoom lens so that a video of an object whose dimensions are known is brought to an image pickup to set dimensions on a monitor television picture. CONSTITUTION:A target A placed at a point of a front distance D of a television camera 1 is brought to an image pickup through a zoom lens 2 by the television camera 1, and its video is reflected on a picture of a monitor television 3. Therefore, the zoom lens 2 of the television camera 1 is driven and operated so that the video dimensions of the monitor television 3 becomes set dimensions, for instance, basing on a scale drawn on the picture. According to such a system, a conventional large-scale transmitting and receiving device, etc. are not required, and an extremely simple device is obtained.
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