标题： 三十米望远镜红外成像光谱仪（IRIS）：光谱仪设计 显示英文标题

标题： The infrared imaging spectrograph (IRIS) for TMT: spectrograph design

摘要： 红外成像光谱仪（IRIS）是三十米望远镜（TMT）的三个首发仪器之一，也是唯一一个直接采样衍射极限的仪器。 该仪器由一个平行成像仪和一个离轴积分视场光谱仪（IFS）组成，用于最佳利用近红外（0.84微米-2.4微米）自适应光学校正后的焦面。 我们概述了设计用于探测从高红移星系的动力学和形态学到研究太阳系天体大气和表面的科学目标的IRIS光谱仪，后者需要窄视场和高斯崔尔性能。 IRIS光谱仪是一个混合系统，结合了两种最先进的IFS技术，提供了四种板尺度（4毫弧秒，9毫弧秒，25毫弧秒，50毫弧秒spaxel大小）。 我们介绍了这个独特的混合系统的结构设计，该系统在一个主要硬件共享的配置中结合了透镜光谱仪和图像切割光谱仪的功能。 结果是一种强大而经济的解决方案，否则需要两台独立的30米级仪器。 显示英文摘要

摘要： The Infra-Red Imaging Spectrograph (IRIS) is one of the three first light instruments for the Thirty Meter Telescope (TMT) and is the only one to directly sample the diffraction limit. The instrument consists of a parallel imager and off-axis Integral Field Spectrograph (IFS) for optimum use of the near infrared (0.84um-2.4um) Adaptive Optics corrected focal surface. We present an overview of the IRIS spectrograph that is designed to probe a range of scientific targets from the dynamics and morphology of high-z galaxies to studying the atmospheres and surfaces of solar system objects, the latter requiring a narrow field and high Strehl performance. The IRIS spectrograph is a hybrid system consisting of two state of the art IFS technologies providing four plate scales (4mas, 9mas, 25mas, 50mas spaxel sizes). We present the design of the unique hybrid system that combines the power of a lenslet spectrograph and image slicer spectrograph in a configuration where major hardware is shared. The result is a powerful yet economical solution to what would otherwise require two separate 30m-class instruments.