Multifocal lens and method of making the same

Details Multifocal lens and method of making the same Multifocal lens and method of making the same

1998-05-29

2000-01-04

Epps, Georgia

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

351177, B29D 1100, G02C 702

Patent

active

060106476

ABSTRACT:
A multifocal lens having a plurality of focal points with focal positions different from each other includes a central optical portion, centered at an optical axis, having a predetermined refractive index. The lens further includes at least one outer optical portion which is an optical member disposed like a ring around an outer periphery of the central optical portion so as to be centered at the optical axis, each having a different refractive index different from the predetermined refractive index and having an optical surface continuous with an optical surface of another optical portion disposed on the center side.

REFERENCES:
patent: 4710327 (1987-12-01), Neefe
patent: 4759762 (1988-07-01), Grendahl
patent: 4795462 (1989-01-01), Grendahl
patent: 5002382 (1991-03-01), Seidner
patent: 5152787 (1992-10-01), Hamblen
patent: 5433898 (1995-07-01), Thakrar et al.

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