Seminar on "Thermoforming of Microlenses”
|Date : 13 Mar 2018 (Tue)
Time : 14:00 - 15:00
Speaker : Prof. Allen Yi, Department of Integrated Systems Engineering, The Ohio State University
Venue : Room EF619, ISE, PolyU
Microlenses are critically important optical components often used in imaging, sensing and many other optical and photonics systems. Traditionally, microlenses are fabricated using semiconductor batch process. As an alternative process, compression molding, a near-net shape manufacturing method, can potentially provide industry with compact, high precision and low-cost optical products. In this presentation, details of this process and several optical devices utilizing compression molded microlens arrays are discussed. These unique optical devices demonstrated the feasibility of the process and highlighted an opportunity to design optical systems using elements that were not economically and technologically possible before.
Prof Allen Yi received his Ph.D. in mechanical engineering from Boston University in 1993 under the direction of Prof Thomas Bifano in ultraprecision machining process for ceramic mirrors. He subsequently joined Corning Precision Lens in Cincinnati as a staff scientist where his main responsibilities included development of advanced manufacturing processes of precision optics. In 2002, Prof Yi joined Ohio State as a tenure track faculty. He was promoted to associate Prof with tenure in 2008 and to full Prof in 2012. Prof Yi’s research activities have been in the general area of precision engineering with focus in high volume optical fabrication, freeform and microoptics fabrication as well as micromachining processes for medical and biomedical device fabrication. Prof Yi has more than 70 referred journal publication. He frequently presents his work at international conferences in precision optical fabrication. Prof Yi has been the coordinator and member of the ASPE (American Society for Precision Engineering)’s scholarship review team. Prof Yi currently serves as the associate editor for both Precision Engineering and ASME Journal of Manufacturing Science and Engineering.