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.

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。

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A rainbow is an optical and meteorological phenomenon that causes a spectrum of light to appear in the sky when the Sun shines onto droplets of moisture in the Earth's atmosphere.

一道彩虹是一种光学和气象现象，导致光频谱时出现在天空中的太阳照耀到液滴的水分在地球的大气层。

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The component shows good light-filtering characteristic in wider free spectrum area, has a wide tunable scope which surpasses many optical filters of other types, and it also presents good fineness.

器件在较宽的自由光谱区内有良好的滤光特性，可调谐范围广，优于绝大部分其他类型的光滤波器，并且具有较高的精细度特性。

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