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DEVICE FOR MATERIAL WORKING BY A LASER BEAM, AND METHOD FOR ITS PRODUCTION

  • US 3,843,865 A
  • Filed: 09/13/1972
  • Issued: 10/22/1974
  • Est. Priority Date: 09/14/1971
  • Status: Expired due to Term
First Claim
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1. A device for material processing by a laser beam of the type having a flexible light guide for directing the laser beam, said device comprising:

  • a single homogeneous unclad quartz rod having 1. a beam entrance face positioned to intersect the beam of light generated by a laser and having a diameter approximately equal to the diameter of the laser beam, 2. a long, flexible fiberlike portion with a diameter substantially smaller than the diameter of said beam entrance face, and a length substantially larger than its diameter, 3. a portion of continuously decreasing diameter extending from said entrance face to one end of said fiberlike portion, 4. a beam exit face of greater diameter than the diameter of said fiberlike portion, 5. a portion of continuously increasing diameter extending from the other end of said fiberlike portion to said beam exit face;

    a flexible tubing for protectably enclosing said quartz rod; and

    a plurality of spacers disposed within said tubing and positioned along the length of said quartz rod, each said spacers having an aperture through which said rod passes, each said spacer being coated with a material having an index of refraction less than said quartz rod, said spacers preventing contact of said rod with said tubing when said tubing is bent.

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