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 173
te character—convex and concave. 1(51 162 WUY STRONG CONTRA-GENERIC LENSES FAIL TO NEUTRALIZE. wherein r is the radius of curvature, n the index of refraction, /^the focus,and e the thickness, in contra-distinction to the formula for neglected thick-ness, wherein r = 2/^ (« — 1) II. It is therefore… … Fig. 1.
Lenses · Prisms (Ophthalmology)
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