Aspherical spectacle lens

Details Aspherical spectacle lens Aspherical spectacle lens

1990-01-18

1991-09-24

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351159, G02C 702

Patent

active

050509802

ABSTRACT:
An aspherical spectacle lens having a positive power. The lens has a front refractive surface and a rear refractive surface. The curvature of an arbitrary meridian passing through a predetermined point on the lens is a function C(r) of the distance r from the predetermined point. The first-order derivative dC/dr of the function C(r) decreases initially as the meridian moves away from the preselected point toward the edge of the lens and then the derivative increases.

REFERENCES:
patent: 4279480 (1981-07-01), Battiol et al.
patent: 4613217 (1986-09-01), Fuerter et al.

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