一种是光电摄象管，它有三个基本部件- -嵌镶光电阳极、集电环和电子枪。
One type is the iconoscope . it contains three essential parts - - a mosaic , a collector ring and an electron gun.
甄别电压外推到零时的计数率随光电倍增管阳极电流而改变，当阳极电流的倒数趋于零时，计数率趋于被测源的活度。
The count rate at the extrapolation of bias to zero varies monotonously with the anode current of phototube and tends to the activity of source as the inverse anode current approaches zero.
表面处理。铝和阳极氧化的铝合金。总反射率的测定。光电反射计法。
Surface treatments. Anodized aluminium and aluminium alloys. Measurement of total reflectivity using a photoelectric reflectometer.
应用推荐