This sensor featuring plane-convex lens collimator for expanding beam and coupling, and a low frequency for lightpulsemodulation is introduced.
利用平-凸透镜准直器作扩束耦合光学系统，采用低频斩光器实现光调制。
2
The change of chlorophyll fluorescence in flag leaves of indica rice was analysed under light and temperature stress and during recovery by PAM pulsemodulation fluoremeter.
用PAM脉冲调制荧光仪分析籼稻剑叶在光温胁迫和恢复期间的荧光变化。
3
It operates both in current mode at high output load and in pulse frequency modulation (PFM) at light load to reduce the power dissipation.