论文信息 - Development of space infrared telescope for the SPICA mission

Development of space infrared telescope for the SPICA mission

The SPICA (Space Infrared Telescope for Cosmology and Astrophysics), which is a Japanese astronomical infrared satellite project with a 3.5-m telescope, is scheduled for launch in early 2010s. The telescope is cooled down to 4.5 K in space by a combination of mechanical coolers with an efficient radiative cooling system. The SPICA telescope has requirements for its total weight to be lighter than 700 kg and for the imaging performance to be diffraction-limited at 5 µm at 4.5 K. Two candidate materials, silicon carbide (SiC) and carbon-fiber-reinforced SiC (C/SiC composite), are currently under investigation for the primary mirror. A monolithic mirror design will be adopted in both cases because of the technical feasibility and reliability. This paper reports the current design and status of the SPICA telescope together with some of our recent results on laboratory cryogenic tests for the SiC and C/SiC composite mirrors.

[1] Hidehiro Kaneda,et al. Optical performance of the ASTRO-F telescope at cryogenic temperatures , 2003, SPIE Astronomical Telescopes + Instrumentation.

[2] Hiroshi Murakami,et al. Cryogenic optical testing of sandwich-type silicon carbide mirrors. , 2003, Applied optics.

[3] H. Shibai. ASTRO-F mission , 2004 .

[4] M. Bougoin,et al. All-SiC telescope technology: recent progress and achievements , 2019, International Conference on Space Optics — ICSO 2004.

[5] K. Enya,et al. Telescope system of the Space Infrared telescope for cosmology and astrophysics (SPICA) mission , 2004 .

[6] Beverly J. Smith,et al. The IRTS (Infrared Telescope in Space) Mission , 1996 .

[7] William R. Irace,et al. Development of the Space Infrared Telescope Facility (SIRTF) , 2003, SPIE Astronomical Telescopes + Instrumentation.

[8] Gury Timofeevic Petrovsky,et al. Interferometric measurements of silicon carbide mirrors at liquid helium temperature , 1995, Optics & Photonics.

[9] Toshio Matsumoto,et al. Mechanical and thermal performance of C/SiC composites for SPICA mirror , 2004, SPIE Astronomical Telescopes + Instrumentation.