| 释义 |
Trimetrogen|traɪˈmɛtrəʊgɒn|
Also trimetrogon.
[f. tri- + Metrogon (see quot. 1944).]
Used attrib. with reference to a technique in which aerial photographs are taken simultaneously by a camera pointing vertically downwards and two pointing obliquely in opposite directions.
1944P. G. McCurdy et al. Man. Photogrammetry (Amer. Soc. Photogrammetry) xiii. 648 In the United States the tri-lens system of map compilation is now usually designated as the ‘Trimetrogon’ method. The word ‘Metrogon’ is the commercial name of the kind of lens generally used, but the method of compilation is not affected by the kind of lens. Ibid., Either the K-17 or K-3B type cameras are used in the trimetrogon assembly. 1952Chambers's Jrnl. Feb. 84/1 The planes..carried the marvellous trimetrogon aerial cameras, developed during the War, which make possible a thousandfold increase of speed and show the landscape in stereoscopic detail. 1969G. C. Dickinson Maps & Air Photographs xv. 244 Something of the best of both worlds is obtained with photographs taken by multiple camera installations, the chief aim here being to reduce cost or time by increasing the area photographed during each run; well-known types are..the American Trimetrogon type where one vertical camera is flanked by two high oblique cameras giving continuous cover from horizon to horizon at each exposure. |