Patent ID: 7064316

Claim:
A method for optical measuring data acquisition of a component that moves in a rotatory or translatory manner, comprising the following steps: generation of a first pair of periodic line patterns ( 2 a , 2 b ) extending in the movement direction of the component and each having n periods over the movement range of the moving component, wherein the line patterns are disposed in a fixed phase relationship to one another in the movement direction of the component ( 2 a , 2 b ), generation of a second pair of periodic line patterns ( 2 c , 2 d ) extending in the movement direction of the component, which each have m periods, over the movement range of the moving component, wherein the line patterns are disposed in a fixed phase relationship to one another in the movement direction of the component ( 2 c , 2 d ), determination of respective periodicities and phases (P 1 , P 2 ; F 1 , F 2 ) of the line patterns of the first pair ( 2 a , 2 b ), determination of respective periodicities and phases (P 3 , P 4 ; F 3 , F 4 ) of the line patterns of the second pair ( 2 c , 2 d ) in relation to a reference value perpendicular to the movement direction of the component, determination of the phase position (PH 1 ) of the first pair of line patterns ( 2 a , 2 b ) (on the basis of the periodicities and phases (P 1 , P 2 ; F 1 , F 2 ), determination of the phase position (PH 2 ) of the second pair of line patterns on the basis of the periodicities and phases (P 3 , P 4 ; F 3 , F 4 ), and determination of the position of the component on the basis of the phase positions (PH 1 , PH 2 ).