A reflective device for an optical measuring system and for arranging in a measuring object, including an optical deflection device and a retroreflector. The deflection device can deflect a light beam at the optical deflection device from an incident axis. The retroreflector can reflect the beam parallel to its incoming direction for each of various incoming directions of a light beam onto the retroreflector. The reflective device can be arranged in the measuring object such that a measuring beam of the optical measuring system, pointed at the measuring object and arriving at the optical deflection device in a first direction, is deflected by the optical deflection device onto the retroreflector in a different, second direction and, following reflection at the retroreflector, is deflected by the optical deflection device in reverse parallel to the first direction. An optical measuring system, a flying object and a flying object system are further described.