• Title/Summary/Keyword: optical astronomy

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CONSTRUCTION OF THE BOAO ECHELLE SPECTROGRAPH (BOES) (보현산천문대 고분산 에셀분광기(BOES) 제작)

  • KIM KANG-MIN;JANG JEONG GYUN;CHUN MOO-YOUNG;PARK BYEONG-GON;HYUNG SIEK;HAN INWOO;YOON TAE SEOG;VOGT STEVEN S.
    • Publications of The Korean Astronomical Society
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    • v.15 no.spc1
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    • pp.119-126
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    • 2000

  • The BOES (BOAO Echelle Spectrograph), a fiber-fed echelle spectrograph of the BOAO 1.8 m telescope, has been designed and now is being manufactured. The BOES follows a white pupil design collimated with two off-axis parabolic mirrors. The 136mm collimating beam leaving the 41.59 grooves/mm R4 echelle grating is refocused near the narrow folding mirror. Through the two cross-disperser prisms and $\phi250 mm(f/1.5)$ transmission camera, the beam images on EEV $2k\times4k$ CCD. The BOES can take the wavelength range of 3700 to $10100{\AA}$ at a single spot with spectral resolution R = 20000 to 40000 depending on the fiber set employed. We describe the key sciences and performance, current status of construction, and future plan of the BOES.

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Development of Optical System for ARGO-M

  • Nah, Jakyoung;Jang, Jung-Guen;Jang, Bi-Ho;Han, In-Woo;Han, Jeong-Yeol;Park, Kwijong;Lim, Hyung-Chul;Yu, Sung-Yeol;Park, Eunseo;Seo, Yoon-Kyung;Moon, Il-Kwon;Choi, Byung-Kyu;Na, Eunjoo;Nam, Uk-Won
    • Journal of Astronomy and Space Sciences
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    • v.30 no.1
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    • pp.49-58
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    • 2013

  • ARGO-M is a satellite laser ranging (SLR) system developed by the Korea Astronomy and Space Science Institute with the consideration of mobility and daytime and nighttime satellite observation. The ARGO-M optical system consists of 40 cm receiving telescope, 10 cm transmitting telescope, and detecting optics. For the development of ARGO-M optical system, the structural analysis was performed with regard to the optics and optomechanics design and the optical components. To ensure the optical performance, the quality was tested at the level of parts using the laser interferometer and ultra-high-precision measuring instruments. The assembly and alignment of ARGO-M optical system were conducted at an auto-collimation facility. As the transmission and reception are separated in the ARGO-M optical system, the pointing alignment between the transmitting telescope and receiving telescope is critical for precise target pointing. Thus, the alignment using the ground target and the radiant point observation of transmitting laser beam was carried out, and the lines of sight for the two telescopes were aligned within the required pointing precision. This paper describes the design, structural analysis, manufacture and assembly of parts, and entire process related with the alignment for the ARGO-M optical system.

  • https://doi.org/10.5140/JASS.2013.30.1.049 인용 PDF KSCI