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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 apochromatism
 複消色差

From: Webster's Revised Unabridged Dictionary (1913)

 Ap·o·chro·mat·ic a.  Optics Free from chromatic and spherical aberration; -- said esp. of a lens in which rays of three or more colors are brought to the same focus, the degree of achromatism thus obtained being more complete than where two rays only are thus focused, as in the ordinary achromatic objective. -- Ap*o*chro*ma*tism n.
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