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6 July 2018 Performance of the reflective optics of MIMIZUKU at cryogenic temperature
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Abstract
MIMIZUKU (Mid-infrared Multi-field Imager for gaZing at the UnKnown Universe) is a near- to mid-infrared camera for the 6.5-m TAO (The university of Tokyo Atacama Observatory) telescope. To realize both the compactness of the instrument and the wide field of view of 2 arcmin, MIMIZUKU has unique reflective optics, which is composed of off-axis aspherical mirrors made of machined aluminum. These mirrors should be placed and aligned very precisely with the accuracy of < 0.01 mm and < 0.01 degrees. We performed the experiments to test whether MIMIZUKU optics works as designed at cryogenic temperature. We present the evaluation of imaging performance and the distortion on the focal plane of MIMIZUKU.
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Tomohiro Mori, Takashi Miyata, Takafumi Kamizuka, Ryou Ohsawa, Shigeyuki Sako, Masahito S. Uchiyama, Jumpei Yamaguchi, and Yutaka Yoshida "Performance of the reflective optics of MIMIZUKU at cryogenic temperature", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107022N (6 July 2018); https://doi.org/10.1117/12.2312772
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