Title:
METHOD AND DEVICE FOR DETERMINING A CHARACTERISTIC OF A BEAM, BY MEANS OF A ROTATING DISC, IN PARTICULAR IN A LASER PROCESSING MACHINE
Document Type and Number:
WIPO Patent Application WO/2011/061706
Kind Code:
A4
Abstract:
A method is indicated for measuring a characteristic of a beam (A, A1.. A3) by means of a disc (3, 3a..3f ), which is rotatably mounted in a device (1) for determining this characteristic in a beam course of the beam (A, A1.. A3) in front of a sensor (6) for measuring an intensity of the beam (A, A1.. A3). For this, the disc (3, 3a..3f) is impermeable to the beam or at least weakens the beam and comprises at least one elongated region (B1.. B7) which is permeable to the beam or at least has higher permeability to the beam compared with the remainder of the disc (3, 3a..3e). By means of this device, an intensity impulse of the part of the beam (A, A1.. A3) impinging on the sensor (6) on rotation of the disc (3, 3a..3e) is detected. The sought characteristic is then determined by application of reconstruction- or modelling methods suitable for inverse problems on the detected intensity impulse. Furthermore, a device (1) and a disc (3, 3a..3f) are indicated for carrying out the method.
Inventors:
LUEDI ANDREAS (CH)
FAHRNI CHRISTOPH (CH)
FAHRNI CHRISTOPH (CH)
Application Number:
PCT/IB2010/055271
Publication Date:
July 14, 2011
Filing Date:
November 18, 2010
Export Citation:
Assignee:
BYSTRONIC LASER AG (CH)
LUEDI ANDREAS (CH)
FAHRNI CHRISTOPH (CH)
LUEDI ANDREAS (CH)
FAHRNI CHRISTOPH (CH)
International Classes:
G01J1/42; G01J1/04
Attorney, Agent or Firm:
ROSENICH Paul (Patentbüro Paul Rosenich AGBGZ, Triesenberg, LI)
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