Laurence, Lionel · London, School of Optics · leaf 94
0, perpendicular to A B, is the refracting plane, on which all the refractioneffected by both surfaces of a thin lens is presumed to be united. Any linesas D D, E E directed to 0, are secondary axes; they are presumed to pass,obliquely to the principal axis, through the lens, and without any… … Fig. 89. Spherical Formation of Lenses.—In each of the diagrams in Fig. 89, whichshows the formation of lenses by the intersection or non-intersection ofspheres and planes, the radius of curvature is a line drawn from the centreof each sphere to its corresponding surface of the lens. The optical…
Optics
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