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http://dx.doi.org/10.14775/ksmpe.2015.14.3.036

Analysis of Polishing Mechanism and Characteristics of Aspherical Lens with MR Polishing  

Lee, Jung-Won (Department of Mechanical Engineering, Inha UNIV.)
Cho, Myeong-Woo (Department of Mechanical Engineering, Inha UNIV.)
Ha, Seok-Jae (Department of Mechanical Engineering, Inha UNIV.)
Hong, Kwang-Pyo (Department of Mechanical Engineering, Inha UNIV.)
Cho, Yong-Kyu (Department of Mechanical Engineering, Inha UNIV.)
Lee, In-Cheol (Department of Mechanical Engineering, Inha UNIV.)
Kim, Byung-Min (Department of Mechanical Engineering, Inha UNIV.)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.14, no.3, 2015 , pp. 36-42 More about this Journal
Abstract
The aspherical lens was designed to be able to array a focal point. For this reason, it has very curved surface. The aspherical lens is fabricated by injection molding or diamond turning machine. With the aspherical lens, tool marks and surface roughness affect the optical characteristics, such as transmissivity. However, it is difficult to polish free form surface shapes uniformly with conventional methods. Therefore, in this paper, the ultra-precision polishing method with MR fluid was used to polish an aspherical lens with 4-axis position control systems. A Tool path and polishing mechanism were developed to polish the aspherical lens shape. An MR polishing experiment was performed using a generated tool path with a PMMA aspherical lens after the turning process. As a result, surface roughness was improved from $R_a=40.99nm$, $R_{max}=357.1nm$ to $R_a=4.54nm$, $R_{max}=35.72nm$. Finally, the MR polishing system can be applied to the finishing process of fabrication of the aspherical lens.
Keywords
MR polishing; Aspherical lens; PMMA; Linear velocity control; Surface roughness;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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