Patent ID: 8659762

Claim:
An optical measuring element for measuring forces in at least one direction wherein said measuring element comprises a single-piece structure that elongates in a longitudinal direction with an outside wall and with at least two notches introduced therein wherein said notches define an elastically flexible zone in the structure being the only connection between a first region and a second region of the structure spaced apart, and wherein for optical distance measurements between the two regions of the structure at least one optical fiber is attached with one end thereof to one of the regions of the structure such that close to the end of said optical fiber a reflective surface is located which is firmly connected to the other of the two regions, wherein the optical fiber is disposed at the outside wall and that each notch consists of parallel edges within the structure in way that the edges the surrounding the notch within the structure are defined by parallel straight lines within the structure, all such lines being parallel to themselves.