Laser beam and ablating apparatus and related method

  • US 5,624,436 A
  • Filed: 01/28/1994
  • Issued: 04/29/1997
  • Est. Priority Date: 01/29/1993
  • Status: Expired due to Term
First Claim
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1. An ablating apparatus, comprising:

  • a controller;

    a laser beam source coupled to and governed by the controller;

    an optical system responsive to a laser beam from the laser beam source for directing the laser beam along a path to an ablation area position of a first object to be ablated;

    means disposed in the laser beam path responsive to the controller for changing the position of the ablation area of the first object to be ablated,a second object for positioning in the path of the laser beam, said second object having a known ablation rate relative to the first object to be ablated;

    first means coupled to the controller for instructing said ablation area position changing means and the laser source to ablate the second object by forming a curved surface having a first refractive power;

    means coupled to the controller for measuring the first refractive power of the curved surface of the second object to obtain a second measured refractive power; and

    means coupled to the measuring means for inputting the measured second refractive power to the controller said controller also including means for comparing the first refractive power to the second measured refractive power, and second means for controlling the laser source and the ablating area position changing means to ablate the first object by forming a curved surface based upon the comparison between the first and second refractive power.

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