为提高分光仪器的性能，采用两个椭球面镜和一个椭球面消像差光栅分光。
To improve the quality of the spectral instruments, two ellipsoidal mirrors and an ellipsoidal aberration-reduced grating are used.
为提高分光仪器的性能，采用两个椭球面镜和一个椭球面消像差光栅分光。
To improve the quality of the spectral instruments, two ellipsoidal mirrors and an ellipsoidal aberration-reduced grating are used.
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