Method and device for optically measuring a thread

A device for optically measuring a thread on an end of a metal pipe, comprising:

• a carrier fastened to an end of a manipulator;
• and
• a measuring head, the measuring head being freely positionable in relation to the metal pipe,
• wherein the measuring head comprises
• a linear drive for linearly adjusting the measuring head relative to the carrier along a linear adjustment path, and
• a rotary drive for pivoting the measuring head relative to the carrier,
• a first leg,
• a first camera and a first light source arranged in the first leg, the first camera being arranged opposite the first light source for forming an optical measuring path for measuring the thread,
• a first line laser that extends approximately at a right angle to the linear adjustment path of the measuring head,
• a second line laser that extends approximately parallel to the linear adjustment path of the measuring head,
• wherein the optical measuring path extends approximately perpendicularly to the linear adjustment path of the measuring head.