Back to results
US 5,541,767 AGranted
Bioptic telescope system for use with bifocal spectacle
AssigneeDesigns for Vision, Inc.
InventorsPeter J. Murphy, Richard E. Feinbloom
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeDesigns for Vision, Inc.
InventorsPeter J. Murphy, Richard E. Feinbloom
Estimating the term…
A method and apparatus for allowing a user who wears spectacles including at least one lens having a positive magnification factor, to view a distant object through both the lens of the spectacles and a telescope. The method comprises the step of positioning a lens in the optical path of the telescope. The lens placed in the optical path of the telescope is adapted to cancel the positive magnification factor of the lens of the spectacles to maintain the afocal characteristic of telescope. The apparatus comprises at least one afocal telescope defining an optical path having a first lens oriented in the optical path for magnifying a distant object to be viewed through the afocal telescope system. The telescope further comprises a second lens oriented in the optical path for cancelling the positive magnification factor of the lens to maintain the afocal characteristic of the telescope.
A method for allowing a user who suffers from presbyopia and who wears spectacles including at least one bifocal lens having a bifocal segment with a positive magnification factor which corrects said user's presbyopia, to view a distant object through both said bifocal segment of said at least one bifocal lens of said spectacles and a first telescope oriented in a first position immediately adjacent to said bifocal segment of said at least one bifocal lens, said first telescope being afocal and defining an optical path, said method comprising the steps of:
A method for allowing a user who suffers from presbyopia to view a distant object through spectacles having at least one bifocal lens having a bifocal segment with a positive magnification factor which operates to correct the user's presbyopia, said method comprising the steps of:
An afocal telescope system for use with a pair of spectacles having at least one bifocal lens having a bifocal segment with a positive magnification factor which operates to correct a user's presbyopia, comprising;
Dependencies are inferred from the claim text.