The invention provides a holographic image corrector in a microscope,
which employs an optical system that has as an objective a lens or
mirror. The characteristics of the objective are recorded by sending a
first laser beam through a spatial filter (or an array of pinholes) and
then through the objective, if a lens or reflecting the beam therefrom,
if a mirror, to form an objective beam. Means are provided for directing
a laser reference beam also through a spatial filter (or an array of
pinholes) and intersecting same with the object beam in a recording
medium, to form a hologram thereof. Then means illuminate the article to
be viewed with a laser beam so that light therefrom passes through the
objective or reflects therefrom and through the hologram, to correct for
aberrations in the objective and provide a relatively clear image of the
article.