Laurence, Lionel · London, School of Optics · leaf 164
lenses are placed in contact the resultant focal length is thesame as that of a single lens situated in the same plane, whose power 1/F isthat of the sum of the two components F1 and F2. The combined powerand F may be written 1F: 1 1 and F= F,F2 F1 + F2 If the lenses are separated by a distance d,… … Fig. 1G4. Equivalent Lens and Focal Length.—Let Ly and L2 (Fig. 164) be twothin Cx. lenses separated by a distance d, and let AB be a ray incident on Zjparallel to the principal axis MN. This is deviated by Lv and, were it notintercepted by L2, would focus at N, but it is refracted still more at 0…
Optics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
