grid ionization chamber

In order to distinguish the signal from the background light,the light-transmission coefficient of a narrow-band filter must be as great as possible and noise must be reduced by a factor of 4.

结果表明,为了能从背景中分辨出信号,窄带栅滤光片的荧光透过率应尽可能大,而背景光要截止到原来的4。