유리 렌즈의 열 성형 공정 조건 도출을 위한 수치해석 연구 = A Study on Numerical Analysis for Determination of Glass Molding Process Conditions for Glass Lenses

다국어 초록 (Multilingual Abstract)

The Glass Molding Process (GMP) produces large quantities of glass optical parts and provides the advantages of highmolding accuracy, short production cycle, low cost, and little pollution. Developments in different sectors, such as camerasand telescopes, are prompting studies on the design of aspherical optical components. Modeling heat transfer anddeformation at high temperatures are crucial aspects of studying glass because its properties are significantly influenced bytemperature-induced phase changes. In this study, temperature changes and geometric deviations of lenses were studiedwith respect to heating, pressing, and cooling times and the heat capacity of the heater used. A 3D model was designedfor the heating, pressing, and cooling steps, and heat transfer was subjected to numerical analysis considering the specificheat of glass and the temperature dependence of thermal conductivity. Lens molding temperature conditions were thenanalyzed with the heat capacity of the lens molding heating system. Lens molding conditions were derived by analyzinglens temperatures with respect to heating and cooling capacities at each process step.