然后在白光光学频谱分析系统中，利用放置在傅里叶频谱面上的取样狭缝得到按频率假彩色编码的频谱图。
The frequency pseudocolor-coded speech spectrogram is then obtained by means of a sampling narrow slit placed at Fourier plane in white-light optical spectrum analyzer.
根据傅立叶光学理论从光栅的衍射频谱中可以反推光栅本身的多种信息，包括其形貌特征。
A lot of grating messages including its profile can be derived from diffraction spectrum of grating according to Fourier optical theory.
利用维格纳变换及其性质，分析了信号频谱及其成像光学系统的特性。
The property of the optical spectrum and imaging systems is analyzed based on the Wigner transformation and its property.
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