Kinoform lenses.
A technique for accurately figuring very thin, lightweight lenses is discussed. The phase change required to focus a plane wave into a point is calculated and photographically plotted with exposure proportional to phase (scaled from 0 to 2pi). The plot is photoreduced and the photoreduction is etched, with the depth of etch approximately proportional to the exposure. The result is a kinoform lens. Photographs taken with a kinoform lens are included.
Jordan
J A
JA
Hirsch
P M
PM
Lesem
L B
LB
Van Rooy
D L
DL