A Research on Plastic Molding Aspheric Lens

• Main Authors: Lee,chin_li, 李進利
• Other Authors: 葉俊良
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/80673501109074604228

碩士 === 大葉大學 === 機械工程研究所碩士在職專班 === 93 === ABSTRACT The congenital shortcoming of the traditional spherical lens is the aberration; usually including spherical aberration, coma, astigmatism, field curvature, distortion and chromatic aberration. Moreover, the spherical lens may result in losing the burnt state because of the spherical aberration. In contrast, the aspheric lens can remedy this fault and can also dispel the aberration of the spherical lens. This research is aimed at experimentally studying the process for the manufacturing the plastic molding aspheric lens and is focused on all relevant practical technologies used in the process. Therefore, this study represents a comprehensive report covering a wide range of theoretical knowledge and related literature. The content of this report focuses on the aspect of practical processing technologies including all important design parameters, such as the characteristics of optical plastic materials, the choice of mould materials, and the limit of working capability, etc. In the study of the aspheric mould, the completed manufacturing process and correction approach were investigated. In the study of molding process technology, the selection of the injecting equipment and the determination of injection conditions and methods were discussed. In the evaluation of product quality, the appearance outline of the aspheric lens, the degree of precision of the aspheric surface, and the resolution of MTF (modulation transfer function) were measured. After above-mentioned manufacturing procedures, the plastic molding aspheric lens matching totally with the designed specifications was successfully made in this study. To fulfill the objective of this research, this report summarizes all of the technical data from the course of the manufacturing processes. Key Words : Spherical ,Aspheric ,Aberration ,Spherical Aberration, Coma ,Astigmatism ,Field Curvature ,Distortion Chromatic Aberration ,Resolution ,MTF (Modulation Transfer Function)