An apparatus for enhanced viewing of objects in two separate simultaneous
frequency bands of light that is constructed in accordance with the
principles of the present invention includes a primary mirror and a
moveable secondary mirror that is disposed above the primary mirror to
provide a long focal length. A beam splitter splits the optical path into
two paths, one for infrared and another path for visible. Various optical
elements and devices are described along each path. The secondary mirror
is displaced away from its concentric position over the primary mirror to
provide shorter focal lengths in IR and visible. Focal Plane Arrays
(FPA's) are disposed where desired along both optical paths for real-time
viewing and data acquisition. The preferred FPA in visible is a CCD. The
preferred FPA in IR is disposed in a Dewar.