reduced optical length 折合光程 ; 缩小像
lens optical length 镜头光学长度 ; 物镜光学长度
optical path length [光] 光程长度 ; 光程长 ; [光] 光路长度
optical length scale 光学刻尺
Optical length measuring instruments 光学长度计量仪器
optical length of periscope 潜望镜潜望力
optical arm length [光] 光臂长度
effective optical path length [动力] 光通道有效长度 ; 滤纸式烟度计
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Based on the principle of energy balance and equivalent optical length, a series of formulas have been derived.
本文根据能量平衡和光程相等的原理，导出一组非平行入射光束的整形器面形设计公式。
The effects of the optical length, the output couple coefficient, and the loss on the STF of optic fiber ring are analyzed.
并分析了光纤环光学长度、耦合输出系数、损耗对光纤环光谱传递函数的作用。
The influence of the optical length, the output couple coefficient of the optical fiber ring cavity upon the STF and the coherence of the loss is also analyzed.
结合光纤环光学长度和耦合输出系数，就损耗对光纤环光谱传递函数和相干性的影响进行了分析讨论。
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