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Ring of light laser optics system

  • US 4,623,776 A
  • Filed: 01/03/1985
  • Issued: 11/18/1986
  • Est. Priority Date: 01/03/1985
  • Status: Expired due to Term
First Claim
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1. A laser optics system for generating a ring-shaped beam of electromagnetic radiation for use in contouring and severing a lens-shaped article article having a curved surface from a workpiece, said system consisting essentially ofA. a focussing element for receiving a circular beam of electromagnetic radiation from an appropriate laser source and transforming said beam into a ring-shaped beam of electromagnetic radiation, said element having two opposed surfaces wherein one of said surfaces is a convex lens surface and the opposite surface is a conical surface which forms an axicon, said element being situated in the path of and concentric with the central long axis of said circular beam such that the circular beam enters the convex surface and the ring-shaped beam concentric with said circular beam emerging from the axicon surface is received byB. a reflective element having a conical reflective surface situated at such an angle and situated in such a position relative to the central long axis of said ring-shaped beam to cause a ring-shaped beam of a preselected diameter to impinge upon a curved workpiece surface located beyond the focussing element and reflective element at a preselected angle with respect to the curved surface of the workpiece.

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