Method and apparatus for material processing with the aid of a laser
First Claim
1. Method for material processing with the aid of a laser in which the laser light is directed via a laser optical system onto the material and the light reemitted or scattered back by the material is conducted via the laser optical system to a detector arrangement which is followed by an evaluating circuit for controlling the laser, wherein the amplitude-versus-time profile of the light incident on the detector arrangement is evaluated after passage of a predetermined period of time from the start of the laser light and is used for controlling the laser and/or an optical switch arranged in the output beam path of the laser.
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Accused Products
Abstract
In a method and an apparatus for material processing with the aid of a laser the laser light is directed via a laser optical system onto the material and the light reemitted or scattered back by the material is conducted via the laser optical system onto a detector arrangement which is followed by an evaluating circuit for controlling the laser. The amplitude-versus-time profile of the light incident on the detector arrangement is evaluated and used to control the laser and/or an optical switch arranged in the output beam path of the laser.
38 Citations
19 Claims
- 1. Method for material processing with the aid of a laser in which the laser light is directed via a laser optical system onto the material and the light reemitted or scattered back by the material is conducted via the laser optical system to a detector arrangement which is followed by an evaluating circuit for controlling the laser, wherein the amplitude-versus-time profile of the light incident on the detector arrangement is evaluated after passage of a predetermined period of time from the start of the laser light and is used for controlling the laser and/or an optical switch arranged in the output beam path of the laser.
- 11. Apparatus for material processing with the aid of a laser which is followed by a laser optical system which directs laser pulses onto material to be processed and guides light reemitted or scattered back from said material onto a detector arrangement which is followed by an evaluating circuit for controlling the laser, wherein the evaluating circuit determines the amplitude-versus-time profile of the light incident on the detector arrangement after passage of a predetermined period of time from the start of a laser pulse, and the evaluating circuit in dependence upon the amplitude-versus-time profile of the light incident on the detector arrangement controls the laser and/or an optical switch interposed between the laser and the laser optical system.
Specification