“stigmatic concave grating”的概念、定义、翻译、参考文献-科学参考

单词	stigmatic concave grating
释义	stigmatic concave grating [stig`mad·ik `kän´kāv `grād·iŋ] ^OPTICS An optical element with many parallel grooves on a concave optical surface; combines the two functions of light dispersion and focusing in one dispersive element; used in space optics, in food and metal analysis, and as a dispersive element of spectrophotometers and spectrographs.
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