Laser transmitting and receiving lens optics

Claim 1

A single optical lens system for both transmitting and receiving laser and other type parallel light beams comprising: a. a convex meniscus lens element and a concave mirror forming a Bouwers lens arrangement; b. a negative lens element immediately ahead of the focal surface of said Bouwers lens assembly, forming a Galilean concentric Bouwers lens assembly; c. said negative element being used to afocalize an incoming converging laser beam so that the Bouwers lens arrangement collimates and directs the laser beam entering the system via said convex lens element and concave mirror to the concentric point of the Bouwers lens arrangement; d. a single mirror surface at said concentric point of the Bouwers lens arrangement for directing said incoming laser beam to one side of the lens assembly; e. a laser beam entering said lens system from said one side of said assembly being directed by said concentric point mirror surface to the negative element which then acts as an expanding element for directing the laser beam to said concave mirror where it is reflected to said convex lens element and passed therethrough to emerge therefrom as a parallel light beam; f. said lenses and mirrors assembly and the relationship thereof being mounted for operating to scan the focal surface of the Bouwers lens arrangement at high angular acceleration and high rates of motion; g. a laser generating means at said one side of the lens assembly for generating a laser beam to be directed through said lens assembly toward a target; h. a laser detector means also at said one side of the lens assembly for detecting incoming and reflected laser signals from a target; i. said laser generating means and said laser detecting means employing a common aperture and a common polarization means at said one side of the lens system to both transmit and receive laser signals.