Demonstrator jig for spectacle lens optical glass has lens frames mounted end-to-end held by magnets

摘要

A demonstration jig holds samples of optical glass (7). Each sample of optical glass is retained by a frame holder with a pivoting side-arm. The side-arm pivot points are co-axial and arranged vertically on a common base (2). The frames are held together by magnets (3) and are interchangeable.