Laurence, Lionel · London, School of Optics · leaf 148
rizontal deviation of the vertical line, and the vertical deviation of thehorizontal, are neutralised, but the vertical effect in the vertical meridian 136 GENEKAL AND PKACTICAL OPTICS and the horizontal effect in the horizontal are doubled, the combinationbeing equivalent to a sph. lens in which… … as B C, and a horizontal line D E appears as D E, the deviation of theselines being towards the axis of the lens, or towards the apices of the virtualprisms. In Fig. 143 let the lens be a + sph.-cyl., whose axis A X is at 45°.Let B be a point situated between the Ver. and the axis. There is, at…
Optics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
