最后给出了两种光程差近似计算的正确方案。
Finally, the right project with of approximate calculation difference of light distance is given.
采用光程差放大技术，提高了干涉系统的分辨力。
The resolution of the laser interferometer is improved by using optical path difference doubling technique.
转镜式傅里叶光谱仪中，转镜的转动形成光程差的非线性。
High-speed rotary Fourier transform spectrometer has nonlinearity of optical path differences (OPD) because of refractor's rotating.
光纤傅里叶变换光谱仪的光谱分辨率是由最大光程差决定的。
Spectral resolution of optical fiber Fourier transform spectrometer depends on maximum optical path difference (OPD).
本文讨论了单球形折射面在傍轴条件下二相邻光束的光程差问题。
The optical path difference of two rays in the condition of near axis is discussed in the single spherical surface refraction.
采用重心法确定干涉条纹调制度的最大值位置，并以此作为零光程差位置。
The centrobaric method was used to determine the position with the maximum modulation value of fringes and the position was used as the point of zero light path difference.
用迈克尔逊干涉仪两臂光程差来补偿两个偏振模的光程差的方法探测传感信号。
The sensing signal is detected by means of compensating the optical path difference of the two orthogonal polarization modes by two arms path difference of Michelson interferometer.
转镜的转动会导致光程差存在非线性问题，是转镜式干涉光谱仪普遍存在的问题。
The nonlinear problem of optical path difference (OPD) of rotating Fourier transform spectrometer universally exists, produced by the rotation of rotating mirror.
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.
对非线性修正问题，目前常用的有光程差替换法、干涉图二次采样法和NUFFT法。
Three methods of correction for the nonlinear OPD were described and compared in this paper, namely NUFFT method, OPD replace method and interferograms fitting method.
保偏光纤内部的高双折射，使得其内部传播的偏振主模和耦合模之间存在着一定大小的光程差。
The main polarization mode and coupling mode in PM fiber has some optical path difference because of internal birefringence.
实验表明，采用该方法对光纤准白光干涉信号零光程差位置的定位精度优于0.5个干涉条纹。
The experiments show that the positioning accuracy of extrapolation method for zero optical path difference point of fiber quasi-white interference signal is less than 0.5 interference fringes.
SANOA长光程差分吸收光谱监测系统，适用于空气自动监测子站SO 2、NO2的测量。
SANOA long-path differential optical absorption spectroscopy system is used to monitoring SO2, NO2 concentration in air automatic monitoring sub-station.
介绍了几种通过改变仪器的结构设计，来增加双光束干涉的光程差，从而提高仪器分辨率的方法。
To improve the resolution, some device is laid out in order to increase the maximum path difference of two beams of the interferometer.
并给出了非接触式、浅近切割式及相切式牛顿环的统一的光程差，牛顿环半径及凸透镜曲率半径测量公式。
And give out the unified optical path, Newton's ring radius and convex lens curvature radius measurement formula of non - contact type, simple cutting type and tangent type Newton's Rring.
并给出了非接触式、浅近切割式及相切式牛顿环的统一的光程差，牛顿环半径及凸透镜曲率半径测量公式。
Theory derivation proved that non-contact type and simple type cutting Newton's Ring device possesses the identical interference law and measurement …
应用矢量坐标变换的方法理论推导了在大量程范围内测量位移与光程差的非线性关系，给出了解析解与数值解。
The nonlinear relation between light travel distance and measured displacement is (deduced) by vector coordinate transforms, and their analytic and numerical results are given.
测试中，当测试波前相对于参考波前的光程差是照明波长的整数倍时形成干涉条纹，由此而形成的二维图就是干涉图像。
Fringes are formed when the optical difference (OPD) between a reference wave front and a test wave front based on the interference of light is an integral multiple of the illuminating wavelength.
具体分析推导了光线入射角变化对这种新型的可调横向剪切量萨伐尔偏光镜的光程差、偏振度以及对系统干涉条纹的影响；
The effect of the incident angle on the optical path difference, state of polarization and interference fringes of the system is deduced in detail.
我们着重分析了其系统中存在的固有的非线性，给出了光程差的计算公式，找出了使系统非线性最好的参数匹配，并进行了仿真实验，得到了理想的结果。
The inherent nonlinerity in the system are analyzed , and the equation of optical path difference(OPD) is given . We obtained the best parameters to decrease the system nonlinerity .
我们着重分析了其系统中存在的固有的非线性，给出了光程差的计算公式，找出了使系统非线性最好的参数匹配，并进行了仿真实验，得到了理想的结果。
The inherent nonlinerity in the system are analyzed , and the equation of optical path difference(OPD) is given . We obtained the best parameters to decrease the system nonlinerity .
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