The principle and an experiment device are introduced by which the measurement of the relative concentration of lotion is carried out continuously with the double beam system of laser.
采用双光路激光系统，对清洗液的相对浓度进行了连续测量，给出了测定原理和实验装置。
At last, the feasibility of fabricating light guide plate by double beam laser direct writing system is confirmed.
最后论证用双光束激光直写系统制作亚微米光栅型导光板的可行性。
This paper introduces the necessity of double beam splitting system applicating in polarization interference phase subdivision and the optimized principle of this beam splitting system.
本文介绍偏振干涉相位细分中应用双光束分光系统的必要性，分光系统的优选原理及结构。
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