Abstract: A computationless system is provided for determining the direction of and distance to a target, involving bathing an area surrounding an area to be protected with a polyspectral series of narrow fan beams of different colors from at least two spaced-apart projectors. The differently colored beams go out at different angles, thus to color-code map the area surrounding the protected space where beams of different colors cross to form color-coded cells. Light reflected back to the area to be protected from a threat has a color code corresponding to the colors associated with beams that cross at the threat, thus to identify by the reflected colors where in space the threat is located.

Abstract: A computationless system 10 is provided for determining the direction of and distance to a target 42, involving bathing an area surrounding an area to be protected with a polyspectral series of narrow fan beams (xi,)ioo) of different colors from at least two spaced-apart projectors 30, 32. The differently colored beams go out at different angles, thus to color-code map the area surrounding the protected space where beams of different colors cross to form color-coded cells. Light 46 reflected back to the area to be protected from a threat 42 has a color code corresponding to the colors associated with beams that cross at the threat, thus to identify by the reflected colors where in space the threat is located.

Abstract: A periscopic beam director is disclosed. The periscopic beam director can be configured with a hemispheric field of regard, in a volume that minimizes external structure or dome size when mounted on a host vehicle (e.g., airplane or UAV). One embodiment combines a Risley Prism refractive beam steering arrangement with an angled azimuthal mount. By using refraction in combination with reflection for changing the beam direction within an optical unit, a substantially more compact periscopic beam director can be realized.