15 June 2006 Aluminum-made 5-cm reflecting telescope for Nano-JASMINE
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Abstract
We report an outline and a current status of developing a small, all-aluminum made telescope for Nano-JASMINE. Nano-JASMINE is a nano-size astrometry satellite that will demonstrate some key technologies required for JASMINE (Japan Astrometry Satellite Mission for Infrared Exploration) in a real space environment and will measure absolute positions of bright stars (z ≤ 8 mag) with accuracies about 1 milli-arcsecond in a few years mission. It has a Ritchey-Chretien type telescope with a 5-cm effective aperture, a 167-cm focal length and a field of view of 0.5x0.5 degree. The telescope only occupies a volume about 15x12x12 cm, and weighs two kilograms or less. Almost all of the structures and the optical elements of the telescope, including two aspherical mirrors three flat mirrors and a dual-angled flat mirror that combines the beam from a relative angle of 99.5 degrees into the primary mirror, are made out of aluminum alloy, being figured by diamond turning machines. The Bread Board Model (BBM) of the telescope was now measured to be achieving a diffraction-limited performance at room temperature.
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Masahiro Suganuma, Masahiro Suganuma, Yukiyasu Kobayashi, Yukiyasu Kobayashi, Naoteru Gouda, Naoteru Gouda, Taihei Yano, Taihei Yano, Yoshiyuki Yamada, Yoshiyuki Yamada, Naruhisa Takato, Naruhisa Takato, Masahiro Yamauchi, Masahiro Yamauchi, } "Aluminum-made 5-cm reflecting telescope for Nano-JASMINE", Proc. SPIE 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, 626545 (15 June 2006); doi: 10.1117/12.670985; https://doi.org/10.1117/12.670985
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