Abstract: In a method for projecting at least one optical projection onto at least one projection surface a monitoring zone that contains and/or surrounds a first projection surface is scanned with the aid of a working laser beam, which is not hazardous for the human eye, by the positioning the working laser beam on various scanning positions located in the monitoring zone, and a measured signal for light from the working laser beam that is reflected from the scanning positions is acquired. The measured signal is compared with the reference signal. Depending on the result of this comparison, the optical projection is projected onto the first projection surface by means of a projection laser beam, which has a greater radiant power than the working laser beam. With the aid of the working laser beam, a second optical projection is projected onto a second projection surface that is located outside of the monitoring zone.

Abstract: A device for the projection of an optical marking onto the surface of an object comprises a projection mechanism for the generation of a pencil of rays directed to the surface and a manipulation mechanism for said pencil of rays. In addition, the device comprises a data storage unit for the filing of a default surface geometry of the object and a measurement mechanism for recording actual position values of the surface. The measurement mechanism and the data storage unit are connected to a comparison mechanism for comparing the actual position values with the default surface geometry. The comparison mechanism is control-connected to the manipulation mechanism for controlling said manipulation mechanism depending on the result of the comparison.

Abstract: In a method for projecting at least one optical projection onto at least one projection surface a monitoring zone that contains and/or surrounds a first projection surface is scanned with the aid of a working laser beam, which is not hazardous for the human eye, by the positioning the working laser beam on various scanning positions located in the monitoring zone, and a measured signal for light from the working laser beam that is reflected from the scanning positions is acquired. The measured signal is compared with the reference signal. Depending on the result of this comparison, the optical projection is projected onto the first projection surface by means of a projection laser beam, which has a greater radiant power than the working laser beam. With the aid of the working laser beam, a second optical projection is projected onto a second projection surface that is located outside of the monitoring zone.

Abstract: A marking device for the creation of an optical mark onto an object has a laser connected to a power supply unit to create a laser beam and a speed acquisition device for determining a positioning speed at which the laser beam follows a repetitive pattern upon the object. The power supply unit has a controlling unit connected to the speed acquisition device which controls the intensity of the laser beam based upon the positioning speed. When the positioning speed decreases the lower predetermined value, the laser beam power is reduced and, if the positioning speed decreases below a minimum positioning speed, the laser beam is switched off.

Abstract: A marking device for the creation of an optical mark onto an object has a laser connected to a power supply unit to create a laser beam and a speed acquisition device for determining a positioning speed at which the laser beam follows a repetitive pattern upon the object. The power supply unit has a controlling unit connected to the speed acquisition device which controls the intensity of the laser beam based upon the positioning speed. When the positioning speed decreases the lower predetermined value, the laser beam power is reduced and, if the positioning speed decreases below a minimum positioning speed, the laser beam is switched off.