Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared Telescope
We have designed a 30 cm cryogenic space infrared telescope for astronomical observation. The telescope is designed to observe in the wavelength range of 0.5~2.1 μm, when it is cooled down to 77 K. The result of the preliminary design of the support structure and support method of the mirror of a 30...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Korean Space Science Society
2012-09-01
|
| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2012/v29n3/OJOOBS_2012_v29n3_321.pdf |
| _version_ | 1797370145050460160 |
|---|---|
| author | Kwijong Park Bongkon Moon Dae-Hee Lee Woong-Seob Jeong Uk-Won Nam Youngsik Park Jeonghyun Pyo Wonyong Han |
| author_facet | Kwijong Park Bongkon Moon Dae-Hee Lee Woong-Seob Jeong Uk-Won Nam Youngsik Park Jeonghyun Pyo Wonyong Han |
| author_sort | Kwijong Park |
| collection | DOAJ |
| description | We have designed a 30 cm cryogenic space infrared telescope for astronomical observation. The telescope is designed to observe in the wavelength range of 0.5~2.1 μm, when it is cooled down to 77 K. The result of the preliminary design of the support structure and support method of the mirror of a 30 cm cryogenic space infrared telescope is shown in this paper. As a Cassegrain prescription, the optical system of a 30 cm cryogenic space infrared telescope has a focal ratio of f/3.1 with a 300 mm primary mirror (M-1) and 113 mm secondary mirror (M-2). The material of the whole structure including mirrors is aluminum alloy (Al6061-T6). Flexures that can withstand random vibration were designed, and it was validated through opto-mechanical analysis that both primary and secondary mirrors, which are assembled in the support structure, meet the requirement of root mean square wavefront error <λ/8 for all gravity direction. Additionally, when the M-1 and flexures are assembled by bolts, the effect of thermal stress occurring from a stainless steel bolt when cooled and bolt torque on the M-1 was analyzed. |
| first_indexed | 2024-03-08T17:57:12Z |
| format | Article |
| id | doaj.art-5ae743c35c74468dbcf1499606bb57af |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:57:12Z |
| publishDate | 2012-09-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-5ae743c35c74468dbcf1499606bb57af2024-01-02T04:09:10ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092012-09-0129332132810.5140/JASS.2012.29.3.321Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared TelescopeKwijong Park0Bongkon Moon1Dae-Hee Lee2Woong-Seob Jeong3Uk-Won Nam4Youngsik Park5Jeonghyun Pyo6Wonyong Han7Korea Astronomy and Space Science Institute, Daejeon 305-348, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaWe have designed a 30 cm cryogenic space infrared telescope for astronomical observation. The telescope is designed to observe in the wavelength range of 0.5~2.1 μm, when it is cooled down to 77 K. The result of the preliminary design of the support structure and support method of the mirror of a 30 cm cryogenic space infrared telescope is shown in this paper. As a Cassegrain prescription, the optical system of a 30 cm cryogenic space infrared telescope has a focal ratio of f/3.1 with a 300 mm primary mirror (M-1) and 113 mm secondary mirror (M-2). The material of the whole structure including mirrors is aluminum alloy (Al6061-T6). Flexures that can withstand random vibration were designed, and it was validated through opto-mechanical analysis that both primary and secondary mirrors, which are assembled in the support structure, meet the requirement of root mean square wavefront error <λ/8 for all gravity direction. Additionally, when the M-1 and flexures are assembled by bolts, the effect of thermal stress occurring from a stainless steel bolt when cooled and bolt torque on the M-1 was analyzed.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2012/v29n3/OJOOBS_2012_v29n3_321.pdfopto-mechanical analysismirror mountZernike polynomialsfinite element methodmirror support |
| spellingShingle | Kwijong Park Bongkon Moon Dae-Hee Lee Woong-Seob Jeong Uk-Won Nam Youngsik Park Jeonghyun Pyo Wonyong Han Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared Telescope Journal of Astronomy and Space Sciences opto-mechanical analysis mirror mount Zernike polynomials finite element method mirror support |
| title | Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared Telescope |
| title_full | Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared Telescope |
| title_fullStr | Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared Telescope |
| title_full_unstemmed | Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared Telescope |
| title_short | Performance Analysis for Mirrors of 30 cm Cryogenic Space Infrared Telescope |
| title_sort | performance analysis for mirrors of 30 cm cryogenic space infrared telescope |
| topic | opto-mechanical analysis mirror mount Zernike polynomials finite element method mirror support |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2012/v29n3/OJOOBS_2012_v29n3_321.pdf |
| work_keys_str_mv | AT kwijongpark performanceanalysisformirrorsof30cmcryogenicspaceinfraredtelescope AT bongkonmoon performanceanalysisformirrorsof30cmcryogenicspaceinfraredtelescope AT daeheelee performanceanalysisformirrorsof30cmcryogenicspaceinfraredtelescope AT woongseobjeong performanceanalysisformirrorsof30cmcryogenicspaceinfraredtelescope AT ukwonnam performanceanalysisformirrorsof30cmcryogenicspaceinfraredtelescope AT youngsikpark performanceanalysisformirrorsof30cmcryogenicspaceinfraredtelescope AT jeonghyunpyo performanceanalysisformirrorsof30cmcryogenicspaceinfraredtelescope AT wonyonghan performanceanalysisformirrorsof30cmcryogenicspaceinfraredtelescope |