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Title: Method and apparatus for optimizing the efficiency and quality of laser material processing

Abstract

The efficiency of laser welding and other laser material processing is optimized according to this invention by rotating the plane of polarization of a linearly polarized laser beam in relation to a work piece of the material being processed simultaneously and in synchronization with steering the laser beam over the work piece so as to keep the plane of polarization parallel to either the plane of incidence or the direction of travel of the beam in relation to the work piece. Also, depending to some extent on the particular processing being accomplished, such as welding or fusing, the angle of incidence of the laser beam on the work piece is kept at or near the polarizing or Brewster's angle. The combination of maintaining the plane of polarization parallel to plane of incidence while also maintaining the angle of incidence at or near the polarizing or Brewster's angle results in only minimal, if any, reflection losses during laser welding. Also, coordinating rotation of the plane of polarization with the translation or steering of a work piece under a laser cutting beam maximizes efficiency and kerf geometry, regardless of the direction of cut. 7 figs.

Inventors:
Issue Date:
OSTI Identifier:
7021675
Patent Number(s):
4908493 A
Application Number:
PPN: US 7-200252
Assignee:
Midwest Research Inst., Kansas City, MO (United States)
DOE Contract Number:  
AC02-83CH10093
Resource Type:
Patent
Resource Relation:
Patent File Date: 31 May 1988
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LASER RADIATION; BEAM SHAPING; MATERIALS; LASER BEAM MACHINING; LASER WELDING; INCIDENCE ANGLE; OPTIMIZATION; POLARIZATION; ELECTROMAGNETIC RADIATION; FABRICATION; JOINING; MACHINING; RADIATIONS; WELDING; 360101* - Metals & Alloys- Preparation & Fabrication; 360201 - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360601 - Other Materials- Preparation & Manufacture

Citation Formats

Susemihl, I. Method and apparatus for optimizing the efficiency and quality of laser material processing. United States: N. p., 1990. Web.
Susemihl, I. Method and apparatus for optimizing the efficiency and quality of laser material processing. United States.
Susemihl, I. Tue . "Method and apparatus for optimizing the efficiency and quality of laser material processing". United States.
@article{osti_7021675,
title = {Method and apparatus for optimizing the efficiency and quality of laser material processing},
author = {Susemihl, I},
abstractNote = {The efficiency of laser welding and other laser material processing is optimized according to this invention by rotating the plane of polarization of a linearly polarized laser beam in relation to a work piece of the material being processed simultaneously and in synchronization with steering the laser beam over the work piece so as to keep the plane of polarization parallel to either the plane of incidence or the direction of travel of the beam in relation to the work piece. Also, depending to some extent on the particular processing being accomplished, such as welding or fusing, the angle of incidence of the laser beam on the work piece is kept at or near the polarizing or Brewster's angle. The combination of maintaining the plane of polarization parallel to plane of incidence while also maintaining the angle of incidence at or near the polarizing or Brewster's angle results in only minimal, if any, reflection losses during laser welding. Also, coordinating rotation of the plane of polarization with the translation or steering of a work piece under a laser cutting beam maximizes efficiency and kerf geometry, regardless of the direction of cut. 7 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {3}
}