Patent ID: 7568385

Claim:
A device for testing a tire having a first sidewall, a second sidewall and a tread portion by means of an interferometric measuring method, wherein each of the first sidewall, the second sidewall and the tread portion have an outer surface and an inner surface, comprising: a measuring unit configured to generate a measurement result; a positioning means configured to position the measuring unit; and an inverting device configured to turn over the tire between a first test stage and a second test stage; wherein the measuring means comprises: a first measuring head oriented in a first measuring direction, the first measuring head being configured to scan a part of the outer surface of the first sidewall in the first test stage and a part of the outer surface of the second sidewall in the second test stage; a second measuring head oriented in a second measuring direction, the second measuring head being configured to scan the remaining part of the outer surface of the first sidewall in the first test stage and the remaining part of the outer surface of the second sidewall in the second test stage; and a third measuring head oriented in a third measuring direction, the third measuring head being configured to scan a part of the inner surface of at least the tread portion in the first test stage and the remaining part of the inner surface of at least the tread portion in the second test stage.