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2/3英寸色分视象管(Coxvicon)的研制,进一步地推进了彩色电视摄象机的小型轻量化,扩大了家用市场。在研制这种色分视象管的同时,还讨论了有关该管小型化问题,提出了今后向1/2英寸及高分辨率发展的建议,并指出了相应的改善措施。有关光导电膜,在实现小型化过程中,灵敏度γ、粒子性等都是重要的因素,在叙述其对策的同时,也指出了电子枪的束发散角,偏转角,束形状的重要性。从实用角度,对静电聚焦与电磁聚焦,双电位型及单电位型的静电透镜作了比较,并进行了讨论。研究的结果认为,如果作为单频率分离方式用,应采用电子束形状的均匀性好的双电位型电子枪;如果作为阶梯能量解调方式用,则应采用调制度高的单电位型电子枪。
The development of a 2/3-inch Coxvicon further expands the home market by making the color TV cameras smaller and lighter. In the development of this color video tube, it also discussed the miniaturization of the tube, proposed the development of 1/2-inch and high resolution in the future, and pointed out the corresponding improvement measures. Regarding the photoconductive film, the sensitivity γ and the particle size are all important factors in miniaturization. While countermeasures are described, the importance of the beam divergence angle, deflection angle and beam shape of the electron gun is also pointed out. From a practical point of view, electrostatic focusing and electromagnetic focusing, bi-potential type and single-potential type electrostatic lens are compared and discussed. As a result of the study, if a single-frequency separation method is used, a bipotential electron gun having a good electron beam shape uniformity should be used, and a single-potential electron gun having a high modulation degree should be used as a step energy demodulation method.