Korean Journal of Computational Design and Engineering (한국CDE학회논문집)

Society for Computational Design and Engineering (한국CDE학회)
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Robust Optimization of a Lens System for a Mobile Phone Camera

휴대폰 카메라용 렌즈 시스템의 강건최적설계

  • 정상진 (한양대학교 대학원 기계공학과) ;
  • 민준홍 (한양대학교 대학원 기계공학과) ;
  • 최동훈 (한양대학교 최적설계신기술연구센터(iDOT)) ;
  • 김주호 (삼성전기(주) OMS 사업부)
  • Received : 2010.03.24
  • Accepted : 2010.08.20
  • Published : 2010.10.01
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Abstract

A lens system for mobile phone cameras is comprised of various lenses and designed so as to satisfy design requirements for responses such as a modular transfer function (MTF). However, it is difficult to manufacture and assemble camera modules to maintain the same performance compared with the designed camera modules, because of uncertainty. We should always design a lens system by considering uncertainty that can be caused by errors in the manufacturing and assembly process of mobile phone cameras. The robust optimization offers tools of making robust decisions with the consideration of design parameters, uncontrollable parameters, and the variance of the system. Using an efficient reliability analysis method and an optimization algorithm, we obtained robust optimization results that maximize the mean of MTF and minimize the standard deviation and proposed a new robust design process for a lens system.

Keywords

References

  1. Rimmer, M. P., "A Tolerancing Procedure Based on MTF", SPIE Meeting on Computer-Aided Optical Design, Optical Research Associates, San Diego, CA, August 28-29, 1978.
  2. 홍성목, 조재홍, 이윤우, 이회윤, 양호순, 이인원, 허문회, "카메라폰 렌즈의 MTF 측정장치 개발", 한국광학회지, 제18권, 제1호, 2007.
  3. Taguchi, G, "Introduction to Quality Engineering", Asian Productivity Organization, Tokyo, 1986.
  4. 박경진, 이태희, 이권희, 황광현, "강건설계기법의 연구동향", 대한기계학회 논문집 A권, 제28권, 제9호, pp. 1368-1383, 2004.
  5. Phadke, M. S., "Quality Engineering Using Robust Design", Prentice Hall, Englewood Cliffs, New Jersey, 1989.
  6. d'Entremont, K. L. and Ragsdell, K. M., "Design for Latitude Using TOPT", Advances in Design Automation, Vol. 14, pp. 265-272, 1988.
  7. Chen, W., Allen, J. K., Tsui, K. L. and Mistree, F., "A Procedure for Robust Design: Minimizing Variations Caused by Noise Factors and Control Factors", Journal of Mechanical Design, Transactions of the ASME, Vol. 118, No.4, pp. 478-485, 1996. https://doi.org/10.1115/1.2826915
  8. Youn, B. D., Zhimin, X., Wells, L. and Gorsich, D. J., "Sensitivity-Free Approach for Reliability-Based Robust Design Optimization", Proceeding of the ASME 2007 Int. Design Eng. Tech. Conferences & Compo and Inf. in Eng. Conference, 2007.
  9. Rahman, S. and Xu, H., "A Univariate Dimension-Reduction Method for Multi-Dimensional Integration in Stochastic Mechanics", Probabilistic Engineering Mecha-nics, Vol. 19, pp. 393-408, 2004. https://doi.org/10.1016/j.probengmech.2004.04.003
  10. Xu, H. and Rahman, S., "A Generalized Dimension-Reduction Method for Multi-Dimensional Integration in Stochastic Mechanics", International Journal for Nume-rical Methods in Engineering, Vol. 61, pp. 1992-2019, 2004. https://doi.org/10.1002/nme.1135
  11. Youn, B. D., Xi, Z., Wells, L. J. and Wang P.,"Enhanced Dimension-Reduction (eDR) Method for Sensitivity-Free Uncertainty Quantification", 11th AIAA/ISSMO Multi-disciplinary Analysis and Optimization Conference, Portsmouth, Virginia, 2006.
  12. 육순빈, 민준홍, 김동호, 최동훈, "가변적인 샘플링을 이용한 차원 감소법에 의한 신뢰도 해석 기법", 대한기계학회 논문집 A권, 제33권, 제9호, pp. 870-877. 2009. https://doi.org/10.3795/KSME-A.2009.33.9.870
  13. 정상진, 최병렬, 최동훈, 김주호, "휴대폰용 카메라 모듈의 렌즈 시스템에 대한 공차 해석 및 설계 개선에 관한 연구", 대한기계학회 추계학술대회,2008.
  14. Hong, K. J., Kim, M. S. and Choi, D. H., "Efficient Appro-ximation Method for Constructing Quadratic Response Surface Model", KSME International Journal, Vol. 15, No.7, pp. 876-888, 2001.
  15. Choi, H. I., Lee, Y., Choi, D. H. and Maeng, J. S., "Design Optimization of a Viscous Micropump with Two Rotating Cylinders for Maximizing Efficiency," Structural and Multidisciplinary Optimization, Vol. 40, No. 1-6, pp. 537-548, 2010. https://doi.org/10.1007/s00158-009-0373-5
  16. McKay, M. D., Beckman, R. J. and Conover, W. J., "A Comparison of Three Methods for Selecting Values of Input Variables in the Analysis of Output from a Computer Code", Technometrics, Vol. 21, No.2, pp. 239-245, 1979. https://doi.org/10.2307/1268522