The laser extensometer - type parallel scanner is used for non-contact measurement of strain or compression of specimen at uniaxial load.

Before starting the experiment, two marks are put on the sample. A laser beam is directed onto a rotating optical flat. During entering and leaving the laser beam is refracted at two opposite planes of the optical flat which results in an identical refractive angle. By the rotation of the optical flat, the laser beam is deflected in parallel to itself and is directed onto the specimen. The laser extensometer scans the measuring range with a visible laser beam. After automatically determining the reference length at the beginning, the positions of the marks are continuously observed throughout the experiment.

Technical Data	P-50	P-100	P-130
Scan Range on Specimen	50 mm	100 mm	130 mm
Working Distance	100..300 mm	100..300 mm	100..300 mm
Resolution (micron)	0.1 um	0.25 um	0.3 um
Accuracy (DIN EN 10002-4)	Class 0.2; 0.5; 1	Class 0.5; 1	Class 0.5; 1
Scanning Rate	50; 200 Hz	50; 200 Hz	50; 200 Hz
Duration of each Scan at Specimen	5.0 ms	5.0 ms	5.0 ms
Scan Speed On Specimen	10 m/s	20 m/s	27 m/s
Specimen Surface	plane or structured (components)	plane or structured (components)	plane or structured (components)