Patent ID: 7622181

Claim:
A resin-cemented optical element, comprising: a base member having an external diameter and a periphery, and a resin layer having an external diameter and a peripheral edge face, and said resin layer is formed 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, said external diameter of said base member is larger than said external diameter of said resin layer, an exposed region of said base member that is not covered with said resin layer is used to be pushed with an ejector when said optical element is released from a mold, a peripheral portion of said resin layer that is a region within 1 mm from said peripheral edge face has 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 has a thickness of 850 μm or larger as maximum thickness of said resin layer.