Optical element manufacturing method and surface processing device

摘要

A method includes: a main body processing step of forming a lens main body having the concave lens surface; a molding step of coating a molding resin on the concave lens surface, pressing a microstructure forming mold, having a molding surface portion transferring the reflection preventing part formed on the surface of a deformable base body part thereof, against the concave lens surface, and curing the molding resin; and a mold release step of exerting a moment of a force relating to the surface top of the molding surface portion so as to deform the base body part to gradually separate the microstructure forming mold from an outer peripheral side thereof in a direction in which the concavo-convex shape of the reflection preventing part extends, thereby performing mold release.

主权项

1. A method for forming a microstructure on a concavo-convex optical surface of an optical element having an optical axis, the method comprising:
placing a molding resin on the optical surface; pressing a flexible microstructure forming surface onto the molding resin so as to form an uncured microstructure on the optical surface; curing the molding resin to form a cured microstructure on the optical surface, the cured microstructure having a circular outer periphery and a center as viewed along a plane perpendicular to the optical axis; and separating the flexible microstructure forming surface from the cured microstructure by lifting and bending the microstructure forming surface in such a manner that:
the flexible microstructure forming surface is separated from the cured microstructure in a sequence beginning at the outer periphery of the cured microstructure and moving inwardly toward the center of the cured microstructure; andat each point where the flexible microstructure forming surface is separated from the cured microstructure it does so in a direction that is substantially normal to the optical surface.