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http://dx.doi.org/10.3807/KJOP.2012.23.5.189

Statistical Analysis of Focus Adjustment Method for a Floating Imaging System with Symmetric Error Factors  

Ryu, Jae Myung (R&D Team, Digital Imaging Business, Samsung Electronics Co., Ltd.)
Kim, Yong Su (R&D Team, Digital Imaging Business, Samsung Electronics Co., Ltd.)
Jo, Jae Heung (Department of Applied Optics and Electromagnetics, Hannam University)
Kang, Geon Mo (R&D Team, Digital Imaging Business, Samsung Electronics Co., Ltd.)
Lee, Hae Jin (R&D Team, Digital Imaging Business, Samsung Electronics Co., Ltd.)
Lee, Hyuck Ki (R&D Team, Digital Imaging Business, Samsung Electronics Co., Ltd.)
Publication Information
Korean Journal of Optics and Photonics / v.23, no.5, 2012 , pp. 189-196 More about this Journal
Abstract
A floating optical system is a system that moves more than 2 groups to focus at the camera lens. At the camera optics, the floating system that is mainly used is an optical system such as a macro lens which changes magnification very much. When the floating system is assembled and fabricated in the factory, there are differences between the image plane of the sensor and the focal plane of the infinity or macro state. Therefore, in a considerable proportion of cases, the focus adjustment to minimize the difference of BWD(Back Working Distance) is carried out in the process of manufacturing. In this paper, in order to decide the movement of each group in a floating system, we evaluated the rotation angle of CAM for the focus adjustment. We know that the maximum magnification of macro state is corrected by this numerical method for the focus adjustment, too. We investigated the limit of CAM rotation angle of the system by using statistical analysis for CAM rotation angle, which uses the focus adjustment of the floating system with symmetric error factors.
Keywords
Lens design; Zoom lens design; Tolerance analysis; Floating imaging system;
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Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 W. Mendenhall, R. J. Beaver, and B. M. Beaver, Introduction to Probability and Statistics, 12th ed. (Thomson, Boston, USA, 2006), Chapter 11.
2 G. R. Henderson, Six Sigma Quality Improvement with MINITAB, 2nd ed. (John Wiley & Sons, Midlothian, UK, 2006), Chapter 6.
3 D. C. Watch, "The lens roadmap of E mount," (Impress Watch Corporation, Japanese ed., 2012), http://dc.watch.impress.co.jp/img/dcw/docs/511/246/html/022.jpg.html.
4 Panasonic, "The lens roadmap of micro four-third lenses," (Panasonic Co. Ltd., Japanese ed., 2012), http://panasonic.jp/dc/lens/index.html.
5 K. Yamaji, "Design of zoom lenses," in Progress in Optics VI, E. Wolf, ed. (North-Holland, Amsterdam, Netherlands, 1971), Chapter 4.
6 J. M. Ryu, J. H. Jo, G. M. Kang, H. J. Lee, and S. Yoneyama, "Focus adjustment method with statistical analysis for an interchangeable zoom lens with symmetric error factors," Korean J. Opt. Photon. 22, 230-238 (2011).   과학기술학회마을   DOI   ScienceOn
7 J. M. Ryu, "Lens system," US Patent US2010-0177407A1 (2010).
8 J. H. Jung, "Paraxial design and locus analysis of zoom lens system," Ph. D. Thesis, Kyungnam University, Changwon, Korea (1994).
9 W. H. Press, S. A. Teukolsky, W. T. Vetterling, and B. P. Flannery, Numerical Recipes in C, 2nd ed. (Cambridge University Press, Cambridge, UK, 1992), Chapter 3.
10 J. M. Ryu, "Macro lens system and pickup device including the same," US Patent US2011-0096410A1 (2011)
11 Samsung, "The lens roadmap of NX lenses," (Samsung Electronics Co. Ltd., Korean ed., 2012), http://www.nxlens.com/lens_lineup.asp.
12 J. M. Ryu, G. M. Kang, H. J. Lee, H. K. Lee, and J. H. Jo, "Correction method for the variation of the image plane generated by various symmetric error factors of zoom lenses of digital still cameras and estimation method of defect rate due to the correction," Korean J. Opt. Photon. 15, 420-429 (2006).   과학기술학회마을   DOI
13 Amateur Photographer, "AP award winners 2011," (IPC Media Ltd., 2011), http://www.amateurphotographer.co.uk/news/AP_Awards_2011_news_305140.html.