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 19
rsection with the perpendicular in r^ establishing the direction of thefinal ray, /. As p^ and p- are parallel from the construction it follows that the ray / isparallel to i, and therefore of the same direction. PRISMS. § 5. Pursuant to the spirit of our intention to avoid mathematical for-mulaB,… … Fig. 2. Fig. 3. Specifically, we shall select two right-angled prisms of var3ing angles,«* and a, with the rays t* and r incident perpendiculary to the verticalsides ah^ and a^b^, so as to avoid refraction on the incident sides, as shownin the vertical sections, Fig. 2 and Fig. 3, respectively. At…
Lenses · Prisms (Ophthalmology)
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