Laurence, Lionel · London, School of Optics · leaf 146
PRACTICAL OPTICS effect is precisely the same as if the lens were combined with a prism. Simi-larly, if a centered lens is looked through at a point which is not in line withthe optical and geometrical centres the effect is the same as if a sphero-prismwere substituted. To learn whether a sph. lens… … Fig. 136. Fig. 137. Fig. 138. junction does not coincide with the centre of the lens and the Ver. line, as inFig. 137, or the Hor. line as in Fig. 138, is broken at the edges of the lens, orboth are broken. In a sph. lens there is only one point, i.e. the optical centre on the prin-cipal axis of…
Optics
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