Patents by Inventor Emmanuel Bonbon

Emmanuel Bonbon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Gradient index, null geometrical power unifocal ophthalmic lens
    Patent number: 5033838
    Abstract: A unifocal ophthalmic lens has a part-spherical concave surface and a part-spherical convex surface. Its refractive index varies radially from its optical axis to its periphery. It has a null geometrical power so that its optical power is due only to the variation in its refractive index.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: July 23, 1991
    Inventors: Emmanuel Bonbon, Jean-Louis Mercier
  • Method of minimizing the maximum thickness of a unifocal ophthalmic lens and gradient index unifocal ophthalmic lens obtained by application of this method
    Patent number: 5033839
    Abstract: A unifocal ophthalmic lens has part-spherical concave and convex surfaces. Its refractive index varies radially from its optical axis to its periphery. The variation of the refractive index is governed by a law such that the absolute value of the optical power of the lens is significantly greater than its geometrical power when the optical power is computed using the refractive index of the lens on its optical axis.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: July 23, 1991
    Inventors: Emmanuel Bonbon, Jean-Louis Mercier