光程长 Path length ; optical length ; optical path length
光程长度差 Path length difference
光程长度 [光] optical path length ; Path length
有效光程长度 effective path length
长光程监控 long path monitoring
长光程干涉器 long path interfermeter
长光程筋气光谱 long path air spectrum
长光程吸收池 long path cell
固定光程长吸收池 fixed path length cell
长光程流通池 The LP Flowcell
基于甲烷气体的红外光谱吸收特性，研究了长光程差分吸收式甲烷气体检测的方法。
Based on the infrared spectrum absorption characterization of methane gas, the long optical distance differential absorption method for methane detection is studied.
设计和制作了一种新型的长光程薄层光谱电化学池。
A new type of thin layer spectroelectrochemical cell with a long optical path length was designed and constructed.
对于单个样品，当最佳光程长获取存在较大误差时，应使所选光程长落在大于最佳光程长区域；
For a single sample, the pathlength should be selected in the range that is longer than optimum pathlength if a large pathlength selection error is unavoidable.
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