Multifocal length lens

Details Multifocal length lens Multifocal length lens

1977-07-20

1979-06-05

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350 9625, 350 9627, 350194, G02B 516, G02C 706

Patent

active

041572130

ABSTRACT:
A lens having portions of different optical characteristics includes a large number of small cross-section glass rods fused together in side-by-side parallel relationship, the rods throughout the lens having selected different optical characteristics whereby to obtain different viewing characteristics upon looking through the lens. The method for making the lens includes the steps of selecting a plurality of glass rods having different optical characteristics and fusing the rods together in a bundle with the optically different rods uniformly dispersed throughout the bundle, stretching the bundle to reduce the cross-section thereof to an extent that the individual rods are not visually discernible when the lens is used for viewing, and forming a lens from the stretched bundle.

REFERENCES:
patent: 2653516 (1953-09-01), Johnson
patent: 2992516 (1961-07-01), Norton
patent: 3594075 (1971-07-01), Smith

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