| 单词 |
stigmatic concave grating |
| 释义 |
stigmatic concave grating 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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