To reduce the construction size of narrowbandpassfilter, it is needed to look for the coating materials with high refractive index.
为了简化窄带光学滤波器的结构，需要寻求更高折射率的膜层材料。
2
The principle and characteristic of the signal generated lay the sensor is analyzed. The narrowpassband following up filter, which fits to regulate the signal, is designed.
分析了该光电传感器的工作原理及信号特点，设计了适合处理该信号的窄带通跟踪滤波器。
3
Preparation narrow-bandpassfilter by plasma ion assisted deposition;