Rückfläche

Rückfläche is a German term that translates to "reverse side" or "backside" in English. It is used in various contexts to refer to the posterior or opposite surface of an object.

In numismatics, Rückfläche refers to the reverse side of a coin or medal, which typically displays imagery or inscriptions distinct from the obverse (front) side. This side often carries the denomination, national symbols, or historical motifs.

In optics and lens design, Rückfläche describes the rear surface of a lens element. This is the surface that is furthest from the object being viewed and where the light rays converge or diverge before reaching the observer or sensor.

In the context of art and conservation, Rückfläche can denote the back of a canvas, panel, or sculpture. This area might contain artist signatures, labels, inscriptions, or evidence of the artwork's history and previous exhibitions. The condition and contents of the Rückfläche are often important for authenticating and understanding a work of art.

The precise meaning of Rückfläche is dependent on the specific field in which it is used, but it consistently indicates the opposite or rear aspect of an item or surface.