Cassegrain interface module (CIM) of the fiber-fed high resolution echelle spectrograph has been designed and manufactured for the 1.8 m reflector at the Bohynsan Optical Astronomy Observatory. We also constructed a long slit spectrograph attached to this CIM, which would replace the earlier rather inefficient medium dispersion spectrometer. We present detailed description for design and manufacturing concepts of the CIM which consists of a slit assembly, slit monitoring system, calibration lamp system and a long slit spectrograph, in order to provide how the overall system and each part. are constructed. The preliminary performance test carried out so far seems to indicate a successful result.

• KANG-MIN KIM(Korea Astronomy Observatory/Department of Astronomy and Atmospheric Sciences, Kyungpook National University)
• BE-HO JANG(Korea Astronomy Observatory)
• INWOO HAN(Korea Astronomy Observatory)
• JEONG GYUN JANG(Korea Astronomy Observatory)
• HYUN CHUL SUNG(Korea Astronomy Observatory)
• MOO-YOUNG CHUN(Korea Astronomy Observatory)
• SIEK HYUNG(School of Science (Astronomy), Chungbuk National University)
• TAE-SEOG YOON(Department of Astronomy and Atmospheric Sciences, Kyungpook National University)
• STEVEN S. VOGT(UCO/Lick Observatory, University of Califonia at Santa Cruz)