Patent ID: 6908266
Filing Date: 2005-06-21
Classification: B29C,B29D,Y10T

Abstract:
1. Apparatus for forming a microlens array mold, comprising: an indexable substrate for exposing one of a plurality of milling positions on said substrate, a forming element for milling said indexable substrate, said forming element having a half-radius rotatable hardened cutting member having a single half-optical-radius cutting edge for milling a predetermined shaped mold cavity in any one of said plurality of milling positions on said indexable substrate, said half-radius rotatable hardened cutting member having a contoured front cutting face for penetrating said indexable substrate at one of said milling positions, and having a rear face, an intersection of the front face, the cutting edge, and the rear face defining an axis of rotation of said half-radius rotatable hardened cutting member in said indexable substrate, said rear face and said indexable substrate having a clearance therebetween, said front cutting face defining the half-optical-radius cutting edge with one end of said edge terminating at said axis of rotation and the other end terminating distal from said axis of rotation for cutting a mold cavity having a center and an edge with said center having a greater depth than said edge.