Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 439
ragm behind the lens. The causeis readily seen to be due to the difference in deviation of pencilspassing through the center and the edge of the lens respectively.If two lenses are used, with the diaphragm at the optical center ofthe combination these distortions correct each other. As shown in… … Fig. 304. as the corresponding distances AB, BC, etc., in the image, so that thereis no distortion, and if A, B, C are in the same plane, ABC, etc., must bein the same plane. Such lenses are called rectilinear or orthoscopic doublets.The size of the photographic image of a distant object is nearly…
Physics
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