单词 | schlieren method |
释义 | schlieren method [`shlir·ǝn ´meth·ǝd] OPTICS An optical technique that detects density gradients occurring in a fluid flow; in its simplest form, light from a slit is collimated by a lens and focused onto a knife-edge by a second lens, the flow pattern is placed between these two lenses, and the diffraction pattern that results on a screen or photographic film placed behind the knife-edge is observed. |
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