Ophthalmic lenses, dioptric formulae for combined cylindrical lenses : the prism-dioptry, and other optical papers (1900)
Prentice, Charles Frederick, b. 1854 · Philadelphia : Keystone · leaf 116
unit-deflection i?i the meter-plane^ so that the prob-lem reduces itself to the selection of a series of prisms which shall producetangent-deflections, at this distance, which are multiples of the adoptedunit. As the deviation produced by a prism will be dependent upon its angleand the index of… … Fig. 2. have <^ abc = /?, as the angle of the prism ; <^ zep^ = /?, the angle of inci-dence ; <:^ pev, the angle of refraction ; <^ dev = y, the angle of deviation. Consequently the index of refraction 1 = sifi <^ pgv sin (<^ ped -f <^ dev) sin (/? -f y) sin <^ iep^ sin…
Lenses
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