Measure of the effective optical path of QN-1total flow extinction type smoke meter developed recently is described in detail.
对近期所研制的QN - 1型全流消光式烟度计有效光路的测定进行了较为详细的叙述。
This article has shown that it is necessary to distinguish the eikonal function, effective optical path and geometrical length etc. of active medium while investigating optical resonators.
本文指出，在光学谐振腔的研究中应当区分用程函、有效光程、激活介质的几何长度等物理量。
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