Study on pressing conditions in the molding of aspheric glass lenses for phone camera module using design of experiments

Hye-Jeong Kim; Du-Hwan Cha; Sang-Suk Kim; Jeong-Ho Kim

doi:10.1117/12.754331

10 September 2007 Study on pressing conditions in the molding of aspheric glass lenses for phone camera module using design of experiments

Hye-Jeong Kim, Du-Hwan Cha, Sang-Suk Kim, Jeong-Ho Kim

Author Affiliations +

Proceedings Volume 6717, Optomechatronic Micro/Nano Devices and Components III; 671709 (2007) https://doi.org/10.1117/12.754331
Event: International Symposium on Optomechatronic Technologies, 2007, Lausanne, Switzerland

Abstract

Recently, the application of aspheric glass lenses is rapidly expanding due to the availability of mass production employing the glass molding press(GMP) process. To date, the GMP process has been regarded as one of the reliable methods in fabrication of aspheric glass lenses. However, it has been found that there are some difficulties during the process to control many parameters (e.g. molding temperature, pressing time and pressing force, etc). Design of experiments (DOE) is one of the solutions to properly control these parameters and a useful tool in the process and analysis of complicated industrial design problems. This study investigated the pressing conditions in the molding of aspheric glass lenses for the mega pixel phone camera module using the DOE method. The fractional factorial design is applied and the form accuracy (PV) of the aspheric surface of the molded lens is employed as a response variable. The analysis results indicate that the only two main effects, the time of pressing step 2 and the force of pressing step 1, are available for the form accuracy (PV) of the molded lens. It is the optimum condition among the designed pressing conditions for lowering the form accuracy (PV) value that all factors are at their low levels. The form accuracies (PV) of the mold and molded lens under the optimum condition are 0.181 um and 0.22 um, respectively.

Citation Download Citation

Hye-Jeong Kim, Du-Hwan Cha, Sang-Suk Kim, and Jeong-Ho Kim "Study on pressing conditions in the molding of aspheric glass lenses for phone camera module using design of experiments", Proc. SPIE 6717, Optomechatronic Micro/Nano Devices and Components III, 671709 (10 September 2007); https://doi.org/10.1117/12.754331

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