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一、光电放大式检流计的工作原理及技术指标光电放大式检流计是利用光电放大原理构成的。检流计分放大器 G_1和光点指示器G_2两部份。放大器装有光电变换器(包括两个对称的硒光电池 Pc_1和 Pc_2,一个作光源的灯泡)和反射镜,以提高灵敏度。光电池利用反向并联组成差动光电池组,如图1所示。二个光电池的输出光电流 I_1和 I_2方向
First, the photoelectric amplification galvanometer working principle and technical indicators Photoelectric amplification galvanometer amplification principle is the use of optoelectronic components. Current-sense amplifier G_1 and light-spot indicator G_2 two parts. The amplifier is equipped with a photoelectric transducer (including two symmetrical selenium cells Pc_1 and Pc_2, a light bulb for the light source) and a reflector to increase the sensitivity. Photovoltaic cells make use of reverse parallel composition of differential photovoltaic cells, shown in Figure 1. The two photocell output photocurrent I_1 and I_2 directions