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本文介绍三管式彩色摄象机实时重合校正系统的开发。迄今为止,动态重合误差,在Ⅰ区超过0.1％,在Ⅲ区的重合误差超过0.5％,从而损害了图象质量。采用该系统后,Ⅰ区的动态重合误差在0.05％以内,Ⅲ区为0.1％。为了实时工作,采用“曲面近似法”(curved surface approximation)。在十毫秒内计算出校正信号,并每隔10.05秒从摄象机内的微处理机送到扫描偏转电路进行校正。
This article describes the development of a three-tube color camera real-time coincidence correction system. To date, the dynamic coincidence error, which exceeds 0.1% in area I and exceeds 0.5% in area III, compromises the image quality. With this system, the dynamic coincidence error in zone I is within 0.05% and that in zone III is 0.1%. In order to work in real time, the “curved surface approximation” is used. The correction signal is calculated in ten milliseconds and sent to the scanning deflection circuit from the microprocessor in the camera every 10.05 seconds for correction.