Laurence, Lionel · London, School of Optics · leaf 243
of a point-object, situated on a secondary axis,there results a blurred pear or comet shaped halo of confusion partly surround-ing a bright point, the latter being directed towards the axis. The halo ABERRATIONS OF FORM 231 spreads away from the axis because the aberration is caused mainly by… … Fig. 243. Let d and e (Fig. 243) be rays proceeding from a distant point on anoblique axis A B. The ray e meets the surface of the lens sooner than d,and since e departs more from minimum deviation than does d, the ray e ecuts the axial ray at e sooner than does d d at d. Influencing Factors.—Coma…
Optics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
