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目前我国生产的热释电摄象管几乎都采用氘化硫酸三甘肽作为靶面材料。由于靶面材料内部偶极子的偶极矩相对极化轴的方向是杂乱的,所以必须预先极化,使所有偶极子都平行于极化轴。靶面只有完全极化,图象才能保持清晰。现行的摄象机极化方法复杂,并且容易损坏靶面。我们研制的自动极化电路包括时标发生器、时序逻辑电路、靶电压调节器、聚焦电压调节器、负脉冲转换器。时标发生器实际上是多谐振荡器,提供时钟脉冲信号。时序逻辑电路是由置零电路、计数器和触发器组合成的一种节拍发生器,为电压调节和
At present, almost all of the pyroelectric tubes produced in our country use deuterated tri-glyceryl sulfate as the target surface material. Since the dipole moments of the dipoles within the target surface material are cluttered with respect to the direction of the polarization axis, it must be pre-polarized so that all the dipoles are parallel to the polarization axis. Only fully polarized target surface, the image can be kept clear. Current methods of camera polarization are complex and easily damage the target surface. We developed the automatic polarization circuit, including timing generator, timing logic circuit, the target voltage regulator, focusing voltage regulator, negative pulse converter. The timing generator is actually a multivibrator, providing a clock signal. Timing logic circuit is set by the zero circuit, counter and trigger combination of a beat generator for voltage regulation and