A device designed to reflect radar waves well in order to make it clearly visible on radar screens. Radar reflectors can be installed for example in boats or signal buoys.

A reflector intended for pedestrians, runners, and motorized and non-motorized vehicles. It aids visibility of a person or vehicle as it reflects light from headlights of vehicles.

A combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas, the main characteristic being that the optical path folds back onto itself, relative to the optical system's primary mirror entrance aperture.

A reflector with a curved reflecting surface that forms part of a paraboloid (as opposed to, for example, a sphere)