Of an instrument or apparatus: constructed to assist vision; acting by means of light; spec. operating in the visible part of the spectrum as…
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| 单词 | θ64982 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > [adjective] (7) optical1610 Of an instrument or apparatus: constructed to assist vision; acting by means of light; spec. operating in the visible part of the spectrum as… Subcategories:— to assist the sight (1) — for looking through (3) — that distorts object looked at (1) — modified so as to cause vignetting of image (1) |
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