Lummer, O. (Otto), 1860-1925, Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · London, New York, Macmillan and Co., 1900 · leaf 127
ays traversing the optic system, shall be similar to one another — is expressed simply by the propor- tionality of the linear co-ordinates. The letters 7] f, 7/ r v, r v may be used to denote the values, resulting from the dioptric approximation formulae, of the co-ordinates of the traces of a ray… … The magnitudes H, Z, R, and H', 71, R', may be termed the reduced co-ordinates of the points of intersection of the rays with the planes. Further, one may consider the co-ordinates r;, r and 7/, r as being measured in their several planes by units of measurement conveniently chosen, so that in…
Photographic optics
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