The IGRINS is a near infrared high resolution spectrograph jointly developed by the Korea Astronomy and Space Science Institute and the University of Texas at Austin. We present design and fabrication of the optomechanical mount for the five mirrors, i.e., an input fold mirror, a slit mirror, a dichroic, and two camera fold mirrors. Based on the structure analysis and the thermal analysis of finite element methods, the optomechanical mount scheme satisfies the mechanical and the thermal design requirements given by the optical tolerance analysis. The performance of the fabricated mirror mounts has been verified through three IGRINS commissioning runs.

ABSTRACT
1. 서론
2. 미러 마운트 모델 설계
    2.1. 인풋폴드미러 마운트
    2.2. 슬릿미러 마운트
    2.3. 다이크로익 마운트
    2.4. 카메라폴드미러 마운트
    2.5. 다이크로익 베이스 어셈블리
3. 안정성 공차 및 구조해석
    3.1. 정렬 안정성 공차
4. 열해석
    4.1. 열 모델 및 경계조건
    4.2. 카메라폴드미러의 온도 행동
5. 결론
REFERENCES

• 오재석(한국천문연구원) | JAE SOK OH (Korea Astronomy and Space Science Institute)
• 박찬(한국천문연구원) | CHAN PARK (Korea Astronomy and Space Science Institute)
• 김강민(한국천문연구원) | KANG-MIN KIM (Korea Astronomy and Space Science Institute)
• 천무영(한국천문연구원) | MOO-YOUNG CHUN (Korea Astronomy and Space Science Institute)
• 육인수(한국천문연구원) | IN-SOO YUK (Korea Astronomy and Space Science Institute)
• 오희영(한국천문연구원/과학기술연합대학원대학교) | HEEYOUNG OH (Korea Astronomy and Space Science Institute/Korea University of Science and Technology)
• 정의정(한국천문연구원/경북대학교 대기원격탐사연구소) | UEEJEONG JEONG (Korea Astronomy and Space Science Institute/Center for Atmospheric Remote Sensing (CARE), Kyungpook National University)
• 유영삼(한국천문연구원) | YOUNG SAM YU (Korea Astronomy and Space Science Institute)
• 이한신(맥도날드천문대) | HANSHIN LEE (McDonald Observatory, University of Texas at Austin)
• 이성호(㈜에스이랩) | SUNGHO LEE (Space Environment Laboratory, Inc.)