The 3.5-m all-SiC telescope for SPICA
The 3.5-m all-SiC telescope for SPICA
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DOI：
10.1117/12.551405
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发表时间：
2004-10
期刊：
影响因子：
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通讯作者：
Y. Toulemont;J. Breysse;D. Pierot;E. Sein;T. Nakagawa;H. Kaneda;T. Onaka;M. Hirabayashi;K. Narasaki;H. Sakuta;S. Miura
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文献类型：
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作者：
Y. Toulemont;J. Breysse;D. Pierot;E. Sein;T. Nakagawa;H. Kaneda;T. Onaka;M. Hirabayashi;K. Narasaki;H. Sakuta;S. Miura
宇宙学和天体物理学空间红外望远镜（SPICA）位于L2拉格朗日点，将在4.5K的5至200 μm波长范围内工作。大口径望远镜（单件直径3.5米）需要一个强大的制造母版，与高技术性能相关。EADS-Astrium（法国）在3.5米碳化硅赫歇尔望远镜上获得的背景是SPICA开发成功的关键。EADS-Astrium已被日本宇宙航空研究开发机构（JAXA）和住友重工授予通过设计阶段合同评估3.5米全碳化硅望远镜的可行性。望远镜的驱动要求是3.5米的大直径，特别是对制造方面至关重要，以及波前误差，必须在从环境温度到4.5K的工作温度的大温度范围内保持在350 nm rms以下，这需要对失真进行强有力的控制。
Placed on the L2 Lagrangian point, the Space Infrared Telescope for Cosmology and Astrophysics (SPICA) will operate in the 5 to 200 μm wavelength range, at 4.5K. The large aperture telescope (3.5m diameter in a single piece) requires a strong manufacturing mastering, associated with high technical performances. The background acquired by EADS-Astrium (France) on the 3.5m Silicone Carbide Herschel Telescope is a key for the success of the SPICA development. EADS-Astrium has been awarded by the Japan Aerospace Exploration Agency (JAXA) and Sumitomo Heavy Industries to assess the feasibility of the 3.5m all SiC telescope through a design phase contract. The Telescope driving requirements are the large diameter of 3.5m especially critical for the manufacturing aspects, and the Wave Front Error which has to be kept below 350nm rms over a large temperature range from ambient to the operational temperature of 4.5K which requires a strong mastering of the distortions.