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 91
rcumstances, neutralize each other throughout. By the previous considerations we therefore here also find : 14. Tlie positive and negative focal planes are conjugateplanes, subject to variations of the angle between the axes ofthe contra-generic cylinders. The diagram, Plate III, has been… … III. DIOPTRAL* FORMUL/E FOR COMBINED CYLINDRICAL LENSES. I. RELATION BETWEEN THE PRINCIPAL PLANES OF REFRAC-TION AND THE REFRACTIVE POWERSOF THE CYLINDERS. As the task of reducing diophies to their focal distances would rendercalculation by the preceding formulae somewhat arduous, we may heregive…
Lenses · Prisms (Ophthalmology)
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