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光电倍增管在现代光信号探测和记录装置中的应用,大大扩展了测量范围,在很多方面促进了透镜仪器测量方法在实践中的广泛利用。测量光通量时,亮度在10~(-8)～10~(-9)至1～2熙提范围内的变化,预先确定有必要创制一种宽范围系统,使之可在输入信号的整个变化范围内保持工作能力。进行海洋研究时,光通量由于衰减率和介质透射选择性很大,随仪器潜深的增大而减小得相当迅速,因此特别需要根据信号大小来自动调节光电探测器灵敏的系统。众所周知,光电倍增管的放大系数在很大程度上取决于电源电压。如果光通量φ的变化
The use of photomultiplier tubes in modern optical signal detection and recording devices greatly expands the measurement range and in many ways facilitates the widespread use of lens instrumentation in practice. Measuring luminous flux, the brightness in the 10 ~ (-8) ~ 10 ~ (-9) to 1 ~ 2 Xi mention within the scope of changes in the pre-determined the need to create a wide range of systems that allow the entire input signal changes To maintain the ability to work within the scope. For oceanographic research, the luminous flux is quite selective due to the decay rate and medium transmission, which decreases quite rapidly with the depth of the instrument, so that it is especially desirable to automatically adjust the photodetector-sensitive system based on signal size. It is well known that the amplification factor of a photomultiplier tube depends largely on the supply voltage. If the luminous flux φ changes