Method of making progressive lens surface and resulting article

Details Method of making progressive lens surface and resulting article Method of making progressive lens surface and resulting article

1983-07-22

1987-06-30

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

264 25, 351177, 425808, G02C 706, B29D 1100

Patent

active

046766103

ABSTRACT:
The disclosure relates to progressive power or multifocal ophthalmic lens and methods and formers for making such lens. The optical power of such lens varies gradually from a near viewing zone to a distance viewing zone. Selected mathematical functions are progenitive of the lens and former shapes, and steps of the methods are characterized by various mathematical functions, and coordinate systems which are constrained to provided the desired transition of optical powers in an intermediate zone of the lens.

REFERENCES:
patent: 3785724 (1974-01-01), Cretin-Maitenaz
patent: 4056311 (1977-11-01), Winthrop
patent: 4062629 (1977-12-01), Winthrop
patent: 4118853 (1978-10-01), Mignen
patent: 4315673 (1982-02-01), Guilino et al.
"Lens Design Fundamentals", R. Kingslake, AP-1978.
French Patent Application No. 2,509,482.

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