Provided is an optical thread position detection device for detecting the rotational position of threads of containers. The thread position detection device comprises at least an optical detector and a positioning device for the defined orientation of a longitudinal axis of the containers relative to the detector ,the positioning device and a defined coupling area of the container being connectable to one another. The optical detector , without coming into contact, registers items of information on at least one relative rotational position of at least one thread portion, the processor device serving to generate data on the rotational position of the container, incorporating a defined reference variable and the items of information.