Abstract: A system and computer-implemented conflict resolution method for resolving air traffic conflicts involving a plurality of aircraft. The system may comprise an air traffic control system having a computer that implements a conflict resolution method, and a radar coupled to the traffic control system that provides position and velocity information for each aircraft. A communication subnetwork is used to communicate between aircraft and the traffic control system. Each aircraft may have a computer that implements the conflict resolution method, and a data link for transferring position and velocity information between the aircraft and the traffic control system over the communication subnetwork. Thus, either the aircraft, or the air traffic control system, or both implement the present method.

Abstract: An optical system (10) has an image source (12), a first optical element (34), a second optical element (50), and an aperture stop (52). The first optical element (34) is positioned close to the image source (12) to generate anamophic field curvature of matching the display screen (16). The radiation is then directed to the second optical element (50) which corrects astigmatism of the radiation passing from the first optical element (34). The aperture stop (52) is provided adjacent to the second optical element (50). The system may be used in an infinite display optical system where the radiation would be directed through projector 14 to a screen (16). A mirror (18) is positioned to reflect the radiation from the screen (16) to provide an image to a viewer.