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 174
Fig. 4. in Fig. 1. Or, viewing it in another light: Parallel rays, z, which are in-cident to the concave lens, are refracted by it, passing into the convexlens, as if emanating from the virtual focal point /, of the concave lens,which is outside of the focal point, /^, of the convex lens in Fig. 4.…
Lenses · Prisms (Ophthalmology)
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