title: [Non-contact measuring of small translations and rotations in all degrees of displacement].
abstract: The investigation of biomechanical problems often makes it necessary to measure displacements and rotations in space. An easy-to-handle optical measuring system has been developed that permits non-contact simultaneous determination of small translations and rotations in all degrees of freedom. Three two-dimensional light-sensitive sensors (PSD [position sensing detector] elements) were arranged spatially to form a measuring sensor. After processing in a computer, the signals definitively determine relative shift and rotation. Thus it is possible, for example, to measure the relative movement between two adjacent spinal vertebrae under different loads.
authors.affiliation: Abteilung für Unfallchirurgische Forschung, Universität Ulm.
authors.forename: L
authors.initials: L
authors.lastname: Dürselen
authors.forename: L
authors.initials: L
authors.lastname: Claes
authors.forename: H J
authors.initials: HJ
authors.lastname: Wilke
mesh_terms: D001696:Biomechanical Phenomena; D001842:Bone and Bones / Q000502:physiology; D006801:Humans; D007834:Lasers; D008027:Light; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D016474:Weight-Bearing / Q000502:physiology*
vernacular_title: Berührungsloses Mesen kleiner Translationen und Rotationen in allen Freiheitsgraden.