Laurence, Lionel · London, School of Optics · leaf 198
ppears afterrefraction, to proceed from a corresponding point situated on the other.These two points are on the same side of the axis and equally distant from it,and each is the image of the other. The distances P1P2=NlN2 : N1Fx=PiF2.NzF2=P1F1 F2-F1=P1Nl=P2N2=th.e imaginary equivalent radius of… … Fig. 208. Construction of Image.—In Fig. 208 let PXP2 be the principal planes,NXN2 the nodal points, FXF2 the principal foci, and AB any object in therarer medium, the system being positive. A ray APX parallel to the axisis refracted at P2 through F2. A secondary axis A Nx passes on emergencefrom…
Optics
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