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前言在现有电视扫描装置(通常是指行扫描装置)中,采用与偏转线圈串联的校正电容器、来校正对称的S型图象非线性失真,这种失真是由于电子束偏转半径与电视萤光屏表面曲率半径存在差别所致。这种校正方法具有一些缺点。第一个缺点是:不能调节校正程度,不能精确选择不同显象管用的校正电容器,因为校正电容
Introduction In the existing television scanning device (usually referred to as a line scanning device), a correcting capacitor in series with the deflection yoke is used to correct the symmetrical S-shape image nonlinear distortion due to the electron beam deflection radius and the TV firefly The radius of curvature of the screen surface is different. This method of calibration has some disadvantages. The first drawback is: can not adjust the degree of correction, can not accurately select different kinescope correction capacitors, because the calibration capacitor