Ophthalmic lenses, dioptric formulae for combined cylindrical lenses : the prism-dioptry, and other optical papers (1907)
Prentice, Charles F. (Charles Frederick), b. 1854 · Philadelphia : Keystone · leaf 44
By projecting thefinal rays into the region of their apparent emanation from before the lens,we would obtain a similar increase of the virtual focal line V- F^ V- to themagnitude d^ F^ d^, and to a reversal of the so-defined ellipses, respectingtheir greatest and least diameters, as shown by the… … Fig. 31.Concavo-convex Sphero-cylindrical Lena (+ s^ r axis 90°) The combination of a convex spherical surface with the active meridianof a stronger concave cylinder creates a periscopic section which is concave;whereas the combination of a concave spherical surface with the activemeridian of a…
Lenses · Prisms (Ophthalmology)
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
