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1. US20060103041 - Molds and method of using the same for forming plus or minus lenses

Office
United States of America
Application Number 10992225
Application Date 18.11.2004
Publication Number 20060103041
Publication Date 18.05.2006
Publication Kind A1
IPC
B29D 11/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
11Producing optical elements, e.g. lenses or prisms
Applicants SU KAI
LU RICHARD
WRIGHT DAVID
MAKITA DEBBIE
Inventors Su Kai
Lu Richard
Wright David
Makita Debbie
Agents MERCHANT &; GOULD PC
Priority Data 10992225 18.11.2004 US
Title
(EN) Molds and method of using the same for forming plus or minus lenses
Abstract
(EN)

The present invention encompasses, in part, a method and apparatus for lens casting in which two molds, preferably formed of plastic, are interconnected or joined together via a ring to form a mold cavity having substantially the same dimensions of the lens to be formed therein. The invention is further directed to compositions and methods used in lens casting. In a first implementation the invention includes a mold having a ring having an interior periphery; a front mold formed of a plastic and having a lens-forming surface, an edge circumscribing the lens-forming surface that is sized to be complementarily received within a portion of the interior periphery of the ring, and a base having dimensions greater than the interior periphery; and a rear mold formed of a plastic and having a lens-forming surface.