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

Susemihl, Ingo

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

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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.

Inventors:

Susemihl, Ingo ^[1]

Norderstedt, DE

Issue Date:: 1990-01-01

Research Org.:: Midwest Research Institute, Kansas City, MO (United States)

OSTI Identifier:: 867301

Patent Number(s):: 4908493

Assignee:: Midwest Research Institute (Kansas City, MO)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B23 - MACHINE TOOLS B23K - SOLDERING OR UNSOLDERING

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B - PERFORMING OPERATIONS B23 - MACHINE TOOLS B23K - SOLDERING OR UNSOLDERING
B23K26/08 - Devices involving relative movement between laser beam and workpiece
B23K26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
B23K26/064 - by means of optical elements, e.g. lenses, mirrors or prisms
B23K2101/007 - {Marks, e.g. trade marks}
B23K26/0643 - {comprising mirrors}
B23K26/0665 - {by beam condensation on the workpiece, e.g. for focusing}
B23K26/06 - Shaping the laser beam, e.g. by masks or multi-focusing

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DOE Contract Number:: AC02-83CH10093

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; apparatus; optimizing; efficiency; quality; laser; material; processing; welding; optimized; according; rotating; plane; polarization; linearly; polarized; beam; relation; piece; processed; simultaneously; synchronization; steering; parallel; incidence; direction; travel; depending; extent; particular; accomplished; fusing; angle; kept; near; polarizing; brewster; combination; maintaining; results; minimal; reflection; losses; coordinating; rotation; translation; cutting; maximizes; kerf; geometry; regardless; cut; material processing; laser welding; laser beam; linearly polarized; polarized laser; laser material; laser cutting; laser weld; optimized according; /219/

Citation Formats


                    Susemihl, Ingo. Method and apparatus for optimizing the efficiency and quality of laser material processing.  United States: N. p., 1990. 
        Web.

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                    Susemihl, Ingo. Method and apparatus for optimizing the efficiency and quality of laser material processing.  United States.

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                    Susemihl, Ingo. Mon .  
        "Method and apparatus for optimizing the efficiency and quality of laser material processing".  United States.  https://www.osti.gov/servlets/purl/867301.

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@article{osti_867301,

  title        = {Method and apparatus for optimizing the efficiency and quality of laser material processing},

  author       = {Susemihl, Ingo},

  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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1990},

  month        = {1}

}

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