Laurence, Lionel · London, School of Optics · leaf 174
c. lenses (Figs. 174 and 175) both E1 and E2 generallylie outside the lens on the Cx. side of the PCx., and on the Cc. side of thePCc, but in some cases the one point may be outside, and the other stillwithin the lens; moreover the optical centre 0 lies beyond both equivalentpoints. A ray directed… … Fig. 176. Fig. 177. point of emergence B at the second surface. The position of 0 is thereforevirtual and it is determined by producing B A to cut the principal axis. In piano Cx. and Cc. lenses (Figs. 176 and 177) the only point on thecurved surface parallel to any point on the plane surface is at…
Optics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
