| 释义 |
focimeter Photogr.|fəʊˈsɪmɪtə(r)|
Also focometer.
[f. foc-us + -meter.]
An instrument for finding the chemical focus of a lens which has not been properly achromatized.
1853R. Hunt Man. Photogr. ii. iv. 159 M. Claudet has also devised a very ingenious instrument for focusing, which he calls his Focimeter. 1891S. P. Thompson in Proc. R. Soc. XLIX. 227 These principles are embodied in an instrument described in the paper, and called a focometer. |