Concept and optical design of the near-infrared integral field unit for SWIMS
Concept and optical design of the near-infrared integral field unit for SWIMS
复制标题
SWIMS近红外整体现场单元的概念和光学设计
DOI：
10.1117/12.2054719
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Yoshikawa
中科院分区：
文献类型：
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作者：
Y. Kitagawa;S. Ozaki;K. Motohara;M. Konishi;H. Takahashi;K. Tateuchi;S. Todo;N. Kato;T. Yoshikawa
SWIMS-IFU 是近红外成像摄谱仪 SWIMS（同时彩色宽视场红外多目标摄谱仪）的集成现场单元，SWIMS 正在开发为东京大学阿塔卡马天文台 (TAO) 6.5 米红外望远镜的第一代仪器之一，并且在初始阶段也将安装在斯巴鲁望远镜的卡塞格伦焦点上 （2015年-）。由于 SWIMS 具有宽波长覆盖范围，这是通过放置在准直光束中的二向色镜将其分成蓝色（0.9-1.4μm）和红色（1.4-2.5μm）臂来实现的，IFU 模块使我们能够在 14 '' x 10.''4 的宽视场中同时获得从 0.9 到 2.5μm 的空间分辨整个 NIR 光谱。 IFU 模块的概念是“轻松实现”积分场光谱 (IFS) 模式，无需修改现有光谱仪光学器件。我们的IFU可以像其他狭缝掩模支架一样安装在SWIMS的掩模存储中，因此我们只需将IFU模块插入焦平面阶段即可轻松进行IFS观察。 IFU光学系统由前置光学系统、图像切片器、光瞳镜阵列和伪狭缝镜阵列组成。所有组件将排列在铝制框架上，铝制框架的地板尺寸 < 170 毫米 x 220 毫米），高度 < 60 毫米。与现有的近红外 IFU 仪器相比，我们的 IFU 具有更宽的视场覆盖范围，并且由于其针对视见有限观测进行了优化的更粗糙的空间采样，因此对扩展源更加敏感。在本文中，我们报告了 SWIMS-IFU 的概念和详细光学设计。
SWIMS-IFU is an integral field unit for a near-infrared imaging spectrograph SWIMS (Simultaneous-color Wide-field Infrared Multi-object Spectrograph), which is being developed as one of the first-generation instruments for the University of Tokyo Atacama Observatory (TAO) 6.5-m infrared telescope and will be also mounted on the Cassegrain focus of the Subaru telescope in its initial phase (2015-). As SWIMS has a wide wavelength coverage which is implemented by a dichroic mirror placed into the collimated beam which splitting it intoblue(0.9-1.4μm) andred(1.4-2.5μm) arms, the IFU module enables us to simultaneously obtain spatially resolved entire NIR spectrum from 0.9 to 2.5μm in a wide-field of view of 14 ′′ x 10.′′4. The concept of the IFU module is "easy realization" of an integral filed spectroscopy (IFS) mode without modification of an existing spectrograph optics. Our IFU can be installed in a mask storage of SWIMS like other slit mask holders, so we can easily carry out IFS observation by just inserting the IFU module into a focal plane stage. The IFU optics consists of a pre-optics, an image slicer, a pupil mirror array, and a pseudo-slit mirror array. All the components will be aligned on an aluminum frame which has a floor size of < 170mm x 220mm) and a height of <60mm. Compared to existing near-infrared IFU instruments, our IFU has wider field coverage and is more sensitive for extended sources due to its coarser spatial sampling optimized for seeing-limited observations. In this paper, we report the concept and detailed optical design of the SWIMS-IFU.