A panoramic view of the world surrounding a stationary mast of a submarine
is provided by a plurality of small windows disposed circumferentially
around the mast and a corresponding plurality of lenses for imaging the
fields of view thereof onto coherent fiber optic image bundles. The fields
of view of the lenses overlap to provide a complete panoramic view. The
exit ends of the image guides are arranged to form a polygonal opening so
that a replica of the panoramic view is provided within the opening. A
mirror or prism rotating within the opening scans the view replica and
directs the scanned image to a stationary television camera. A derotating
prism in the path of the directed scanned image rotates at one-half the
angular displacement of the image director to compensate for rotation
imparted to the scanned image by the image director.