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Correction method for the Variation of the Image Plane Generated by Various Symmetric Error Factors of Zoom Lenses of Digital Still Cameras and Estimation of Defect Rate Due to the Correction

디지털 카메라용 줌렌즈에서 대칭성 오차요인에 의한 상면 변화의 보정과 이에 따른 불량률 예측

  • Ryu, Jae-Myung (Optics & Digital Imaging Division, Samsung Techwin Co., LTD) ;
  • Kang, Geon-Mo (Optics & Digital Imaging Division, Samsung Techwin Co., LTD) ;
  • Lee, Hae-Jin (Optics & Digital Imaging Division, Samsung Techwin Co., LTD) ;
  • Lee, Hyuck-Ki (Optics & Digital Imaging Division, Samsung Techwin Co., LTD) ;
  • Jo, Jae-Heung (Dept. of Applied Optics and Electromagnetics, Hannam University)
  • 류재명 (삼성테크윈(주) 광디지털사업부 선도기술팀) ;
  • 강건모 (삼성테크윈(주) 광디지털사업부 선도기술팀) ;
  • 이해진 (삼성테크윈(주) 광디지털사업부 선도기술팀) ;
  • 이혁기 (삼성테크윈(주) 광디지털사업부 선도기술팀) ;
  • 조재흥 (한남대학교 이과대학 광.전자물리학과)
  • Published : 2006.10.25

Abstract

In the zoom lens of digital still cameras with the variation of the image plane generated by various symmetric error factors such as curvature, thickness and refractive index error of each lens surface about the optic axis, we induce a theoretical condition to fix constantly the image plane by translating the compensator group of the zoom lens by using the Gaussian bracket. We confirm the validity of this condition by using three examples of general zoom lens types with 3, 4, and 5 groups, respectively. When these error factors are randomly changed within the range of tolerance according to the Monte Carlo method, we verify that the distributions of the degree of moving of the compensator are normal distributions at three zoom lens types. From capability analysis using these results, we theoretically propose the method estimating the standard deviation, that is, sigma-level, as a function of the maximum movement of the compensator.

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  2. Analytic Calculation Method of Zoom Loci for Zoom Lens System with Infinite Object Distance vol.24, pp.3, 2013, https://doi.org/10.3807/KJOP.2013.24.3.125
  3. Focus Adjustment Method with Statistical Analysis for an Interchangeable Zoom Lens with Symmetric Error Factors vol.22, pp.5, 2011, https://doi.org/10.3807/KJOP.2011.22.5.230