用傅里叶变换的方法分析了锁模激光器中模式间的相位和振幅涨落对锁模脉冲列特性的影响。
The Fourier transform method has been used to analyze the influence of modal amplitude and phase fluctuations in a mode-locked laser on performance of its output pulse.
提出一种利用变形分数傅里叶变换和双随机相位编码对图像加密的方法。
A new optical image encryption method using anamorphic fractional Fourier transform and double random phase encoding is proposed.
提出了一种利用不对称分数傅里叶变换和双随机相位编码对图像加密的方法。
A new optical image encryption method using dissymmetrical fractional Fourier transform and double random phase encoding was presented.
提出了一种基于二维短时傅里叶变换的干涉相位图解缠方法。
A two-dimensional phase unwrapping approach based on two-dimensional windowed Fourier transform (WFT) is proposed.
提出变形分数傅里叶变换双随机相位编码技术。
The paper presents encrpytion techniques of double random phase based on anamorphic fractional Fourier transform.
提出了一种利用不对称分数傅里叶变换和双随机相位编码对图像加密的方法。
A new optical encryption technique based on double random phase computer-generated hologram of asymmetry fractional Fourier transform is presented.
利用傅里叶变换法，解调出了变形场的相位，从而实现了物体变形场的精确测量。
When Fourier transform is used to demodulate the modulated fringe pattern, the phase of deformation is calculated and furthermore the deformation is measured accurately.
该方法对图像分别进行一次菲涅耳变换和分数傅里叶变换，并在图像的菲涅耳域和分数傅里叶域上分别利用随机相位版施行相位编码。
In this paper, image is Fresnel transformed and Fractional Fourier transformed successively, and phase encoding is implemented in both Fresnel domain and Fractional Fourier domain.
结果发现，根据火箭喷焰的莫尔条纹，采用傅里叶变换相位展开技术，可以方便地提取任意截面的投影信息。
As a result, with phase unwrapping technique based on Fourier transform, any cross section projection could conveniently be worked out from the Moiré deflectogram of rocket exhausted plumes.
主要讨论了傅里叶变换红外光谱仪的相位偏移产生的原因，并且用严密的数学推导证明了相位偏移与复数光谱之间的关系。
The phase shift in complex spectrum of Fourier transform infrared (FTIR) spectrometer was discussed. A rigorous derivation showed the relation between the phase shift and complex spectrum.
物面的相位由傅里叶变换法求得。
The phase of the test object can be extracted by Fourier transform.
物面的相位由傅里叶变换法求得。
The phase of the test object can be extracted by Fourier transform.
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