Abstract
The prosperous growth in electro-optics industry has driven the increases in demands on optical components significantly. As the major elements in optical components, optical lenses can be grouped into plastics or glass lenses. The thesis is to investigate the process of precision compression-molding plastic lenses and the problems of residual stresses and birefringence in the lenses. With injection-molded performs plastics lenses are softened by infrared and compressed under microscopic annealing conditions. Lenses heated glass transition temperature release residual stresses close to surface; and they retain the form accuracy by low pressure compression avoiding the post-shrinkage. If vortex tubes are adopted for mold cooling, cycle time of complete process is much reduced. The proposed process shows the advantages of low costs, fast production, and high efficiency by circumventing residual stresses and birefringence in plastics lenses. Finally, this thesis concludes the optimization of compression parameters, residual stresses and form accuracy, and ambient effects for production in plastics lenses in order to provide valuable references to the electro-optics industry.