Handbook of optics for students of ophthalmology (1899)
Souter, William Norwood, 1961-1935 · New York, Macmillan · leaf 137
point will, after refraction by thelens, all pass through a line conjugate to the pointfrom which the rays proceed. If we take another cylindrical lens whose axis is atright angles to that of the first lens, it will bring all CYLINDRICAL LENSES 127 the rays from a point into a line at right angles… … Fig. 35 power, and if we combine them so that the rays afterdeviation by the first lens pass immediately throughthe second lens, the effect of both lenses will be tocause the rays to meet in the point where the linesintersect ; for the rays must all pass through bothlines. In other words, two equal…
Eye · Lenses
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