Patent ID: 7931833
Filing Date: 2011-04-26
Classification: B29D,Y10T

Abstract:
1. A fabrication process for a resin-cemented optical element, comprising: providing a base member having an external diameter and a periphery; forming a resin layer having an external diameter and a peripheral edge face on a surface of said base member, wherein: said base member and said resin layer are in a concentric shape seen from an optical axis direction and said external diameter of said base member is larger than said external diameter of said resin layer; extending said resin layer between said base member and a mold having an aspherical shape, and transferring said aspherical shape of said mold to said resin layer; wherein said transferring forms a peripheral portion of said resin layer, that is a region within 1 mm from said peripheral edge face of said resin layer, having a thickness of 300 μm or smaller for at least some part of said peripheral portion and a region of said resin layer that is inside by 1 mm or more from said peripheral edge face of said resin layer having a thickness of 850 μm or larger as maximum thickness of said resin layer; and pushing an exposed region of said base member that is not covered with said resin layer with an ejector to release said optical element from the mold having said aspherical shape.