Portal de Periódicos da CAPES

MIRIS: A Compact Wide-field Infrared Space Telescope

2014; Institute of Physics; Volume: 126; Issue: 943 Linguagem: Inglês

10.1086/678130

1538-3873

Wonyong Han, Dae-Hee Lee, Woong-Seob Jeong, Young‐Sik Park, Bongkon Moon, Sung‐Joon Park, Jeonghyun Pyo, Il-Joong Kim, Won-Kee Park, Dukhang Lee, Kwang‐Il Seon, Uk‐Won Nam, Sang-Mok Cha, Kwijong Park, Jang-Hyun Park, In-Soo Yuk, Chang H. Ree, Ho Jin, Sun Choel Yang, Hong-Young Park, Goo-Hwan Shin, Joung-Ki Seo, Seung-Wu Rhee, Jong‐Oh Park, Hyung Mok Lee, Hiroshi Murakami, Toshio Matsumoto,

Adaptive optics and wavefront sensing

A compact infrared space telescope called MIRIS (Multi-purpose Infra-Red Imaging System) was developed by the Korea Astronomy and Space Science Institute (KASI), and launched onboard the Science and Technology Satellite-3 of Korea (STSAT-3) in 2013 November. The main mission of MIRIS is the Paschen-α emission line survey along the Galactic plane and the cosmic infrared background (CIB) observation, particularly around the north ecliptic pole region. For these missions, a wide field of view (3.67 × 3.67°) with an angular resolution of 51.6'' and wavelength coverage from 0.9 ∼ 2.0 μm have been adopted for MIRIS, having optical components consisting of a 80 mm main lens and four other lenses with F/2 focal ratio optics. The opto-mechanical system was carefully designed to minimize any effects from shock during the launch process and thermal variation. Also, the telescope was designed to use a passive cooling technique to maintain the temperature around 200 K in order to reduce thermal noise. A micro Stirling cooler was used to cool down the Teledyne PICNIC infrared array to 90 K, which was equipped in a dewar with four filters for infrared passbands of I, H, and Paschen-α and a dual-band continuum line filter. MIRIS system was integrated into the STSAT-3 as its primary payload and successfully passed required tests in the laboratory, such as thermal-vacuum, vibration, and shock tests. MIRIS is now operating in sun synchronous orbits for initial tests and has observed its first images successfully.