A device for multiple separation of a flat workpiece of a brittle material by means of laser

With an inventive device flat workpieces made of brittle material may be prepared by provocation of thermomechanical stresses with laser radiation, in particular along separating lines of the same direction with alternating sense of direction, are time-efficiently separated by the device through two coolant nozzles 6.1, 6.2 has the selectively direct coolant onto the workpiece and which are preferably coupled by optical means 10 to form the laser radiation around the axis 7 of the laser head 1 is rotatably mounted.