OPTOELECTRONIC POSITION MEASURING DEVICE AND OPTOELECTRONIC POSITION MEASURING METHOD

摘要

An optoelectronic position measurement device having a codecarrier that carries at least one optically registeredposition code and that is illuminated with optical radiationfrom a radiation source. At least one portion of the opticalradiation is registered by at least one registration element,by means of which a signal dependent on the position code canbe created and a position of the code carrier relative to theregistration element can thus be registered, wherein the codecarrier is movable relative to the registration element with adegree of freedom - in particular rotating or translating. Theradiation source and code carrier are arranged and designedsuch that the optical radiation couples into the code carrierand is guided at least partially in a beam path in theinterior of the code carrier lying in the extension level ofthe code carrier, in particular to the position code. Thedecoupling of the optical radiation occurs in a decouplingzone such that the registration element is illuminated by asubstantially homogenous intensity distribution.