Laurence, Lionel · London, School of Optics · leaf 85
If rays diverge from a distance equal to Fx they have their image in a planeD E midway between F2 and the surface. Let S G (Fig. 78) be incident on aCc. surface. Now S G cuts the plane N at a distance Fx from the surface inH, and if from H we draw the secondary axis // C we determine the pointwhere… … Fig. 79. If the object-point S (Fig. 79) is within N, draw any line II S backwards tothe plane N and forwards to Q on the surface. Draw H C cutting D E in K;connect K with the surface to meet H S at Q and where K Q cuts the axisin/2, is the image of S.
Optics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
