An optical device inspection system and method employing a narrow aperture
on a magnifying objective lens in order to reduce the circle of confusion
and increase the depth of field. The smaller aperture resulting in an
increase in depth of field allows for simultaneous focus for all portions
of objects being inspected. An arc lamp with an elliptical reflector in
combination with a condenser lens focuses a more intense beam of light
through the objective lens, thereby providing sufficient brightness
without sacrificing any depth of field.