US Patent 8000021 Lens manufacturing apparatus and lens manufactured thereby

A lens manufacturing apparatus includes a first mold, a second mold, a first core, and a second core. The first mold defines a first compartment therein. The second mold defines a second compartment therein. The first core is inserted into the first compartment of the first mold, and includes a first mold surface with a first half-mold cavity and a conic ring surrounding the first half mold cavity. The second core is inserted into the second compartment of the second mold, and includes a second mold surface with a second half-mold cavity. The second half-mold cavity includes a bottom which connects to the periphery of the second mold surface by an acclivitous surface. The acclivitous surface is parallel with the outermost conic surface of the conic ring.