MIRIS, Multi-purpose Infra-Red Imaging System, is the main payload of STSAT-3 (Korea Science & Technology Satellite 3), which will be launched in the end of 2012 (the exact date to be determined) by a Russian Dnepr rocket. MIRIS consists of two camera systems, SOC (Space Observation Camera) and EOC (Earth Observation Camera). During a shock test for the flight model stability in the launching environment, some lenses of SOC EQM (Engineering Qualification Model) were broken. In order to resolve the lens failure, analyses for cause were performed with visual inspections for lenses and opto-mechanical parts. After modifications of SOC opto-mechanical parts, the shock test was performed again and passed. In this paper, we introduce the solution for lens safety and report the test results.

ABSTRACT
1. 서론
2. MIRIS SOC 렌즈파손 개요 및 원인 분석
    2.1. 충격시험 요구조건 및 시험환경
    2.2. 렌즈파손 원인 및 분석
3. MIRIS SOC 렌즈파손 문제 해결
    3.1. 해결 방법 기본 개념
    3.2. 최종 광기계부 제작규격
4. 충격 재시험 결과
    4.1. 충격 재시험 개요
    4.2. 충격 재시험 결과
5. 결론 및 토의
참고 문헌

• 문봉곤(한국천문연구원) | B. -K. MOON (Korea Astronomy and Space Science Institute)
• Yoshikazu Kanai(Genesia Corporation)
• 박성준(한국천문연구원) | S. -J. PARK (Korea Astronomy and Space Science Institute)
• 박귀종(한국천문연구원) | K. -J PARK (Korea Astronomy and Space Science Institute)
• 이대희(한국천문연구원) | D. -H. LEE (Korea Astronomy and Space Science Institute)
• 정웅섭(한국천문연구원) | W. -S. JEONG (Korea Astronomy and Space Science Institute)
• 박영식(한국천문연구원) | Y. -S. PARK (Korea Astronomy and Space Science Institute)
• 표정현(한국천문연구원) | J. -H. PYO (Korea Astronomy and Space Science Institute)
• 남욱원(한국천문연구원) | U. -W. NAM (Korea Astronomy and Space Science Institute)
• 이덕행(한국천문연구원) | D. -H. LEE (Korea Astronomy and Space Science Institute)
• 이승우(한국항공우주연구원) | S. -W. REE (Korea Astronomy and Space Science Institute)
• Toshio Matsumoto(Institute of Space and Astronautical Science/Japan Aerospace Exploration Agency(ISAS/JAXA))
• 한원용(한국천문연구원) | W. HAN (Korea Astronomy and Space Science Institute)