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单词 focimetry
释义 focimetry|fəʊˈsɪmɪtrɪ|
Also focometry.
[f. as prec. + Gr. -µετρία measurement.]
Measurement of focal distance.
1881G. R. Piggott in Nature No. 622. 515 If now an over-corrected lens were substituted, the diffraction rings..and the nebulosity..exactly changed positions as regards focimetry.1891S. P. Thompson in Proc. R. Soc. XLIX. 225 The accepted methods of focometry.
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