The laserXtens 7-220 HP extensometer features seven fixed high-resolution cameras and five laser light sources. The overlapping fields of view of the seven cameras are pooled into one large picture. Both virtual gauge marks are also tracked here during the loading process (speckle tracking). If a gauge mark makes hits the edge of a camera’s field of view, it will be transferred to the field of view of the adjacent camera. This method results in a large measurement range with high resolution.

Combined overall image of the specimen