Experimental study on elastic deformation molding process for generating aspheric surface glass

• Published in: International journal of advanced manufacturing technology Vol. 82; no. 5-8; pp. 859 - 866
• Main Authors: Nguyen, Ducnam, Yuan, Julong, Wu, Zhe
• Format: Journal Article
• Language: English
• Published: London Springer London 01.02.2016; Springer Nature B.V
• Subjects: Aspheric optics; CAE) and Design; Computer-Aided Engineering (CAD; Deformation effects; Elastic deformation; Engineering; Finite element method; Form accuracy; Industrial and Production Engineering; Lapping (finishing); Machining; Mechanical Engineering; Media Management; Molding (process); Molds; Optical glass; Original Article; Polishing; Workpieces; Finite element analysis; Elastic deformation; Aspheric surface; Glass lapping; Glass molding
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-015-7394-6

The elastic deformation machining method has been demonstrated to be a novel optical manufacturing approach which can greatly reduce and simplify the production of large aspheric lens. Upon completion of the machining process, the workpiece under process will be shaped into a desired surface form of mold. The method allows the lapping and polishing of aspheric optical surfaces using a large lapping or polishing tools. The subject of this study is to determine the surface shape of the finished glass workpiece after the lapping process of the elastic deformation machining process associated with molding. The experimental and finite element analysis (FEA) results were compared with the shape of the molded surface form. The form accuracy between the optical glass and mold is within 1.6 μm (within radius 32 mm). The conclusions show that the method proposed is effective for machining the aspheric optical glass with proper elastic deformation machining parameters.