Apparatus for determining the radial intensity distribution of laser radiation

US5514867A · kind A · utility

Inventors

• Eckhard Beyer · Alsbach, DE
• Reinhard Kramer · Pfungstadt, DE
• Peter Loosen · Stolberg, DE

Key dates

• Filing date: Jul 13, 1987
• Grant date: May 7, 1996
• Expiry date: Jul 13, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J1/4257
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A waveguide is arranged in radial extension on a support mounted in rotary manner and whose pivot pin is parallel to the laser beam axis. The outer end thereof intersects the laser beam during a rotation of the support and in each case detects a partial beam of the laser radiation. By means of the waveguide, said partial beam is supplied to a detector, which is arranged in fixed manner in the pivot pin of the support. A hollow waveguide or light guide serves as the waveguide. A parallel displacement of the pivot pin of the support is possible by means of a stepping motor to enable the complete beam profile to be determined by a plurality of sections through the laser beam. In place of the stepping motor, the support can be provided with several waveguides of different lengths, distributed with the same angular spacing over the support circumference and which successively supply the detected partial beams to the same detector.