optical path distortion  光路畸变

2kL method of the optical-path difference  程差2kL法

additional optical path difference  附加光程差

angle multi-path optical system  光学角多路

automatic optical-path switching protection  光路自动切换保护

coaxial optical path  同轴

coaxial symmetric optical path  共轴对称光路

Coherent optical path  相干光路

difference in optical path  程差

double optical path  双光路

double optical path-replacement method  双光路替换法

double-optical path  双光路测量

endoscopic optical path  内窥光路

Equivalent Optical Path  等效光程

extra difference of optical path  附加光程差

Infinite optical path  远心光路

light path and optical path length control mirror  光路程长控制镜

Measuring optical path  检测光程

multi-optical path absorption  多光程吸收

multiple-ring optical path  多环光路