Telescope system of the infrared imaging surveyor (IRIS)
Telescope system of the infrared imaging surveyor (IRIS)
复制标题
红外成像测量仪（IRIS）望远镜系统
DOI：
10.1117/12.317291
复制
发表时间：
1998
影响因子：
2.6
通讯作者：
S. Miura
中科院分区：
文献类型：
--
作者：
T. Onaka;Yoshikazu Sugiyama;S. Miura
描述了日本红外天文空间任务的望远镜系统“红外成像测量仪（IRIS）”。 IRIS 是一台低温冷却望远镜，计划于 2003 年发射。它将进行从近红外到远红外区域的天文观测。 IRIS望远镜系统为Ritchey-Chretien型，主镜尺寸直径为700mm，系统F比为6。为了与两台科学仪器和焦平面星敏感器共享焦平面，它具有半径为38角分的清晰视场。它的设计目标是在 10K 以下的温度下在 5 微米处实现衍射极限性能。 IRIS 望远镜将使用轻质碳化硅 (SiC) 镜子。目前估计主镜重量为9公斤，望远镜系统总重量的目标是小于27公斤。小尺寸 SiC 反射镜在 4.2K 下的初步测试表明，通过改进 CVD 工艺可以减少在低温下检测到的表面形状的轻微变形。望远镜系统的设计满足M-V火箭的发射条件，基频高于100 Hz。
The telescope system of a Japanese IR Astronomical Space Mission, 'IR Imaging Surveyor (IRIS)', is described. The IRIS is a cryogenically-cooled telescope, being planned to be launched in 2003. It will make astronomical observations from near-IR to far-IR regions. The IRIS telescope system is a Ritchey-Chretien type, whose primary mirror size ins 700mm in diameter and whose system F ratio is 6. In order to share the focal plane with two scientific instruments and a focal- plane star sensor, it has a clear field of view of 38 arcminutes in radius. It is being designed to achieve the diffraction-limited performance at 5 micrometers for temperatures below 10K. The IRIS telescope will use light-weight silicon carbide (SiC) mirrors. The current estimate of the primary mirror weight is 9 kg and the goal of total weight of the telescope system is less than 27 kg. Preliminary tests of small size SiC mirrors at 4.2K suggest that slight distortion of the surface figure detected at low temperatures can be reduced by improved CVD processes. The telescope system is designed to meet the launch conditions of the M-V rocket and to have the fundamental frequencies above 100 Hz.