Apparatus adapted for automatic or semi-automatic fabrication of

Details Apparatus adapted for automatic or semi-automatic fabrication of Apparatus adapted for automatic or semi-automatic fabrication of

1982-05-11

1984-03-06

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51284R, 82 11, B24B 500

Patent

active

044345810

ABSTRACT:
A method for forming a plurality of optical surfaces on an optical lens precursor, desirably a "soft" contact lens button or blank, to yield a lens adapted for proximate or intimate contact with an eyeball and defined by at least one posterior surface, an edge and at least one anterior surface, is comprised of forming a precision lens precursor, assembling the precursor in a microsurface generating apparatus, ultra-precisely forming the curves or geometry comprising the posterior surface and a portion of the edge to yield a semi-finished lens, blocking the semi-finished lens on an adhesively coated lens block fixture having an ultra-precisely preformed face for intimate precision mating with the posterior surface of the semi-finished lens, reassembling the semi-finished lens/fixture in the microsurface generating apparatus, ultra-precisely forming the curves or geometry comprising the anterior surface and another portion of the edge, and demounting a finished, ultra-precision lens from the blocking fixture. Also disclosed is a fluid-bearing automatic or semi-automatic machine for performing the instant method to ultra-precision, e.g., by computer control.

REFERENCES:
patent: 2582087 (1952-01-01), Turner
patent: 3169350 (1965-02-01), Corman
patent: 3599377 (1971-08-01), Dartnell
patent: 3605345 (1971-09-01), Humphrey
patent: 3821867 (1974-07-01), Hunkeler
patent: 3835588 (1974-09-01), Whitham
patent: 3840993 (1974-10-01), Shelton
patent: 3903656 (1975-09-01), Binder
patent: 3913274 (1975-10-01), Raiford
patent: 4083272 (1978-04-01), Miller

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