Patent ID: 8004757

Claim:
A safety system provided and adapted for fitting to a laser radiation-guiding device comprising at least one external port to attach a selected one of at least two separate modules, wherein the safety system comprises: at least one counter piece comprising an identifying device and a counter piece mounting unit for fitting the counter piece to the selected separate module or the external port, at least one attachment comprising: an attachment mounting unit for fitting the attachment to the other one of the selected separate module and the external port, and a counter piece detecting sensor, at least one evaluating unit connected to the attachment via a signal link, said evaluating unit detecting the electrical condition of the counter piece detecting sensor and, depending on the detected electrical condition, emitting a control signal to at least one of a control unit of a laser and a laser radiation-blocking device; wherein the identifying device influences the electrical condition of the counter piece detecting sensor of the attachment when the selected separate module or the external port is fitted with the counter piece and the other one of the selected separate module and the external port is fitted with the attachment, and when the identifying device of the counter piece is located within a maximum reach of the attachment and in a predetermined orientation relative to the attachment.