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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