Handbook of optics for students of ophthalmology (1899)
Souter, William Norwood, 1961-1935 · New York, Macmillan · leaf 52
ace, so thatOQ and 0Q are parallel. Connect the points Qand Q by the straight line QQ\ which meets theaxis at C. Then from the similar triangles OCQand OCQ, we have 00: 00 = OQ : 0Q=r:rf, from which —— = ?-. OC rf 42 HANDBOOK OF OPTICS 00Therefore, —— is a constant quantity, irrespective(./ o of… … Fig. 15. fraction; because, the radii OQ and OQ being par-allel, the planes perpendicular to the curved surfacesat Q and Q are parallel, and the lens will, for thisray, act as would a piece of plane glass. Let N be the point on the axis toward which theray is directed before refraction. The ray is…
Eye · Lenses
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