| 摘要 |
PURPOSE:To obtain always the finest picture of an objective subject, by selecting optional position, size and shape on a picture at a detecting part having the brightness of the objective subject. CONSTITUTION:The output of a vidicon is amplified by a video amplifier and the amplified output is supplied to a monitor television. An output corresponding to a prescribed part of a subject out of the output of the video amplifier is supplied to a sensitivity adjusting circuit through a circuit controlling the position, size and shape of a detecting point. Thus the sensitivity of the vidicon is adjusted in accordance with the brightness of the prescribed part of the subject. |
