DOI QR코드

DOI QR Code

가시광선 전대역의 색수차보정을 위한 광학유리의 선정과 이를 적용한 텔레센트릭 렌즈의 설계

Selection of Optical Glasses Using a Chromatic-Aberration Correction Method for the Whole Visible Range Plus a Telecentric Lens Design Applying the Method

  • 유승문 (한국산업기술대학교 광나노공학과) ;
  • 정미숙 (한국산업기술대학교 광나노공학과)
  • Yu, Seung Moon (Department of Nano-optical Engineering, Korea Polytechnic University) ;
  • Jung, Mee Suk (Department of Nano-optical Engineering, Korea Polytechnic University)
  • 투고 : 2015.06.24
  • 심사 : 2015.07.21
  • 발행 : 2015.08.25

초록

본 논문에서는 이중 색지움 렌즈와 삼중 색지움 렌즈의 종색수차 보정식을 이용하여 가시광선 전대역에서 수차를 보정할 수 있는 유리 조합을 연구하고 수차가 보정된 두 렌즈를 결합하여 산업 현장에서 광범위하게 이용되고 있는 비전검사용 텔레센트릭 렌즈를 설계하였다. 그 결과 매우 넓은 파장대역 380 nm ~ 780 nm에서 파면수차를 $0.057{\lambda}$ 를 갖는 광학적 성능을 확보하였으며, 이는 기존에 시판중인 486.1 nm ~ 656.2 nm에서 수차가 보정된 텔레센트릭 렌즈들보다 우수하다는 것을 볼 수 있었다.

This paper shows the best selection and combination of glass in lens design, to correct a chromatic aberration using achromatic and apochromatic conditions. Using this research result, we have designed a telecentric lens for machine vision in the full range of visible light. We obtain good optical quality in the form of a quite small RMS wavefront error of $0.057{\lambda}$ in the super-broadband wavelength range 380 nm -780 nm. This result is better than that for a common telecentric lens in the visible wavelength range 486.1-656.2 nm.

키워드

참고문헌

  1. W. J. Smith, Modern Lens Design, 2nd ed. (Book's Hill Publishing Co., USA, 2007), Chapter 6.
  2. R. Kingslake and R. B. Johnson, Lens Design Fundamentals, 2nd ed. (Elsevier Co., Washington, USA, 2010), Chapter 5.
  3. M. Bass, G. Li, and E. V. Stryland, "Optical properties of Materials," in Handbook of Optics, 3rd ed. (McGraw-Hill, New York, USA, 2010), vol. 4, Chapter 2.
  4. W. J. Smith, Modern Optical Engineering (McGrew-Hill Co., USA, 2008), Chapter 7.
  5. SCHOTT Technical Information No. 29, Refractive Index and Dispersion.
  6. H. Bai, "Large-format telecentric lens," Proc. SPIE 6667, Current Developments in Lens Design and Optical Engineering VIII, 666705 (2007).
  7. R. Schuhmann and G. Adams, "Active glass maps for an optical design program," Proc. SPIE 5249, 3-5 (2003).
  8. R. Schuhmann and G. Adams, "Active glass selection and chromatic correction using individual glass maps," Proc. DGaO-Proceedings (2004), Page 1-2 (Glass map).
  9. P. Hariharan, "Superachromatic lens combinations," Optics & Laser Technology 31, 117-118 (1999).
  10. R. D. Sigler, "Glass selection for airspaced apochromats using the Buchdahl dispersion equation," Appl. Opt. 25, 4313-4319 (1986).
  11. Y. P. Sang, "A design of high magnification apochromatic beam expander and tolerance analysis," Master's Thesis, Cheongju University, Cheongju, Korea (2014), pp. 31-46.