Making of Lenticular lens sheet
A method is given for producing a lenticular lens sheet that consists of improved optical characteristics. The method consists of different steps of providing a platen. It includes a series of grooves formed to define a series of parallel ridges, positioning a formable material sheet next to the platen, making the sheet formable by heating it, and applying a differential pressure to the sheet forcing it into contact with the platen ridges. A lenticular lens sheet having a plurality of parallel lenticules is produced by this process. Each lenticular has a catenary surface which consists of a non-uniform radius of curvature that is greatest at the center of the lenticular and smallest at its outer edges. Generally, this invention is somewhat related to lenticular lenses but maximum resembles thermoformed lenticular lens sheets. In multiple-image display devices, the use of lenticular lens sheet China is a well-established practice. Such display devices typically consist of a printed sh