한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제43권3호
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  • Pages.265-271
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  • 2015
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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온라인 광학보정장치를 적용한 위성카메라의 광학설계

Optical Design for Satellite Camera with Online Optical Compensation Movements

  • Jo, Jeong-Bin (Department of Aerospace and Mechanical Engineering, Graduate School at KAU) ;
  • Hwang, Jai-Hyuk (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Bae, Jae-Sung (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • 투고 : 2015.01.27
  • 심사 : 2015.02.11
  • 발행 : 2015.03.01
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초록

본 연구에서는 소형 위성카메라의 영상성능 저하를 궤도상에서 능동적으로 보정하기 위해 광학보정장치를 적용한 위성카메라의 광학설계를 수행하였다. 2개의 광학 보정장치는 각각 부반사경 및 초점면부에 부착되며 총 5자유도의 운동이 가능하다. 본 논문에서 설계한 광학부는 슈미트-카세그레인(Schmidt-Cassegrain)타입으로 주반사경의 직경은 200mm이고, GSD 3.8m, MTF 성능은 약 50% 정도이다. 설계된 광학계는 수차곡선과 Spot diagram과 MTF를 통해 성능평가를 수행하였다. 수차곡선을 통해 광학성능에 가장 큰 영향을 미치는 수차가 구면수차인 것을 확인 할 수 있고, MTF 해석을 통해서 나이퀴스트 주파수에서 MTF 30%이상의 요구 성능을 충분히 만족하는 것을 확인하였다.

In this study, optical design for small satellite camera equipped with online optical compensation movements has been conducted. Satellite camera equipped with compensation movements at M2 mirror and focal plane can guarantee the MTF performance through the focal plane image stabilization and the on-orbit optical alignment. The designed optical system is schmidt-cassegrain type that has M1 mirror of a diameter 200mm, GSD 3.8m at an altitude of 700km, and 50 % MTF performance. The performance of the designed optical system has been analyzed through the method of ray aberration curve, spot diagram, and MTF. It has been found by the optical performance analysis that the designed optical system satisfies the optical requirements of satellite camera equipped with online optical compensation movements.

키워드

참고문헌

  1. Jiwoong Yu, SangYoung Park, and DongHan Lee, "Attitude Scenarios of Star Observation for Image Validation of Remote Sensing Satellite," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 40 No. 9, 2012, pp.807-817. https://doi.org/10.5139/JKSAS.2012.40.9.807
  2. Lee D. H., Seo D. C., Song J. H., Chung J. H., Park S. Y., Choi M. J., and Lim H. S., "Image restoration of calibration and validation for KOMPSAT-2," The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol. 37 No. B1, 2008, pp.57-62.
  3. DongGi Kwag, JaeSung Bae, and JaiHyuk Hwang, "Dynamic Characteristics of a Piezoelectric Driven Stick-Slip Actuator for Focal Plane Image Stabilization," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 37 No. 4, 2009, pp399-405. https://doi.org/10.5139/JKSAS.2009.37.4.399
  4. Leger D., Viallefont F., Hillairet E., and Meygret A., "In-flight refocusing and MTF assessment of SPOT5 HRG and HRS cameras," Progress in Biomedical Optics and Imaging (SPIE Proceedings Series), No. 4881, 2003, pp.224-231.
  5. Viallefont-Robinet and Francoise, "Edge method for on-orbit defocus assessment," Optics express, Vol. 18 No. 20, 2010, pp.20845-20851. https://doi.org/10.1364/OE.18.020845
  6. YoungMin Cho, " Characteristics of the Image Quality Parameter in Satellite Imaging Instrument," Aerospace Engineering and Technology, Vol. 1 No. 2, 2002, pp.66-74.
  7. Harrie G. J. Rutten, Martin A. M. van Venrooij, and Diane Lucas, "Telescope optics Evaluation and design," Richmond, VA, Willmann-Bell, edited by Richard Berry, 1988, pp.205-218.
  8. HaeJin Choi, "Satellite," Journal of Mechanical Science and Technology, Vol. 45 No. 7, 2005, pp.33-58.
  9. Myoungsoo Kang, Jeanho Park, Jaeup Hwang, Jaihyuk Hwang, and Jaesung Bae, "On the Compensation Device for Image stabilization of High-Resolution Satellite Camera," The Society for Aerospace System Engineering, Spring Conference Paper #1, 2014.
  10. Jeanho Park, Jaihyuk Hwang and Jiyoun Yang, "Conceptual Design for Tilt Mechanism of The Secondary Mirror with Deployment Structure," The Society for Aerospace System Engineering, fall Conference Paper #43, 2014.
  11. HeeSeob Kim, DaeWon Chung, and HaeJin Choi, "Satellite Operation Design for Assessing MTF Preformance of Earth Observation Satellite Using Stellar Source," Journal of Astronomy and Space Sciences, Vol. 24 No. 4, 2007, pp.379-388. https://doi.org/10.5140/JASS.2007.24.4.379
  12. DoMyung Kim, DeokRyeol Kim, Nakwan Kim, Jinyoung Suk, HeeSeob Kim, Gyu-Sun Kim, and YoungMok Hyun, "A Study on Basic Modeling Method for MTF Analysis of Observation Satellites," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 36 No. 5, 2008, pp.472-482. https://doi.org/10.5139/JKSAS.2008.36.5.472
  13. JooHee Lim, "Analyses of Optical and Opto-Mechanical Perfomance of a Wide Field Telescope," Master's Thesis, KyungHee University, 2013.

피인용 문헌

  1. Online refocusing algorithm for a satellite camera using stellar sources vol.24, pp.5, 2016, https://doi.org/10.1364/OE.24.005411
  2. Optical Design of Satellite Camera for Lens Shifting Image Stabilization vol.10, pp.4, 2016, https://doi.org/10.20910/JASE.2016.10.4.17