herical aberration;" that is to say, of the aberration which is produced entirely by the spherical form of the surface of the medium ; the term spherical including the case of refraction at a plane surface, since a plane may be considered as a sphere of infinite radius. Pig. 1 will serve to explain… … Let A B be a single convex lens, and QABa pencil of light incident upon it, proceeding from a luminous point Q. The pencil, B
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
