Abstract: A converging beam linear optical scanning system comprising:an objective lens system for receiving essentially collimated light rays from object space and for converging the essentially collimated light rays along an optical axis to form a relatively flat image field on the relatively flat image plane; the optical axis of the objective lens system being incident on the relatively flat image plane;a meniscus lens having a vertex, the optical axis passing through the vertex, the meniscus lens being shaped to have essentially zero optical power;means for supporting and gimballing the meniscus lens on at least a first pivot axis, the first pivot axis being orthogonal to the objective lens optical axis and positioned to cross the optical axis between the objective lens and the image plane, the meniscus lens position being selected to have the meniscus lens receive the converging light rays from the objective lens system and to transmit the converging light rays to the relatively flat image plane;means for periodic

Abstract: A combined RF/IR system in which a common surface is used in the dual modes of radiating and absorbing RF energy and of reflecting and focusing IR energy. The common surface is structured, configured, and used as the slotted array antenna for the RF energy and as the primary mirror of a Cassegrain optical subsystem for the IR energy.