
Optical Design 11
© 2011 by Taylor & Francis Group, LLC
Aberrations are a direct result of the nonlinearity of Snell’s law, along with
an optical surface’s shape and location within the optical system. The sur-
face’s shape, as well as its distance from the aperture stop, determines the
angles of incidence for the rays striking it. By adjusting the angles of inci-
dence, we can control how large or small the surface’s aberration contribution
is. The amount of each aberration also varies as a function of the entrance
pupil diameter or the eld angle of the system. We now briey discuss each
of the aberrations mentioned, along with methods of con ...