• 1. echelle grating: 中阶梯光栅 | 阶梯光栅 | 红外光栅
• 2. echelle grating spectrometer: 中阶梯光栅光谱仪
• 3. echelle grating spectrography: 中阶梯光栅光谱仪

• 1.The general theories behind echelle and its applications in astronomy are briefed, and the differences between echelle spectrograph and plane grating spectrograph are analyzed and compared.
  简述阶梯光栅的基本原理和在天文学中的应用，分析并比较了阶梯光栅光谱仪与普通平面闪耀光栅光谱仪的区别。
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