This sensor featuring plane-convex lens collimator for expanding beam and coupling, and a low frequency for light pulse modulation 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。
The change of chlorophyll fluorescence in flag leaves of indica rice was analysed under light and temperature stress and during recovery by PAM pulse modulation 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。
It operates both in current mode at high output load and in pulse frequency modulation (PFM) at light load to reduce the power dissipation.
它在重载下工作于电流控制模式，轻载下工作于脉冲频率调制(PF M)模式来降低功耗。
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