Ophthalmic lenses, dioptric formulae for combined cylindrical lenses : the prism-dioptry, and other optical papers (1900)
Prentice, Charles Frederick, b. 1854 · Philadelphia : Keystone · leaf 77
o each other; which provesthat: 7. The primary and secondary focal planes are conjugateplanes, subject to variations of the angle between the axes ofthe congeneric cylinders. In order to comply with this law, in constructing the Plate I, it has beennecessary to select elementary foci in marked… … II. DIOPTRIC FORMUL/E FOR COMBINED CONTRA-GENERIC CYLINDERS I. RELATIVE POSITIONS OF THE PRINCIPAL POSITIVE ANDNEGATIVE PLANES OF REFRACTION. In a combination of convex and concave cylinders, we can no longer havethe primary and secondary planes, which we have learned to consider asplanes of…
Lenses
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