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The infrared imaging spectrograph (IRIS) for TMT: design of image slicer
Kai Zhang1,2; Yifei Zhou1,2,3; Yongtian Zhu1,2; Zhongwen hu1,2
2018-07-13
会议名称SPIE Ground-based and Airborne Instrumentation for Astronomy VII(Vol.10702)
会议录名称Ground-based and Airborne Instrumentation for Astronomy VII
会议日期2018-6-10
会议地点Austin, Texas, United States
摘要
The InfraRed Imaging Spectrograph (IRIS) is one of three first light science instruments for the Thirty Meter Telescope (TMT). It will provide dedicated function of imaging and integral field spectroscopic observations in parallel with the assistance of a Narrow Field InfraRed Adaptive Optics System (NFIRAOS). The IRIS imager delivers celestial light to a dual channel Integral Field Spectrograph (IFS) through a pair of pick-off mirrors in the central field.

The IFS creates multi-functional ability to explore the universe in IR (0.84 – 2.4um) with moderate spectral resolution of R=4,000/8,000 and four spaxel scales of 4, 9, 25, 50 milli-arc-seconds (mas). An image slicer serves one of the two spectral channels as its Integral Field Unit (IFU) in two coarse spaxel scales of 25 and 50mas over the continuous science fields of 2.2x1.125 arc-seconds (arcsec) and 4.4x2.25 arcsec respectively. It splits the field to 88 unit systems, and then re-images at two parallel slits in order to take full advantage of the detector (4Kx4K @ 15um).

This paper describes a novel all-reflective design of image slicer, which uses a new ‘brick stage’ layout to stagger the adjacent mirrors and deliver image quality close to diffraction limit. The quasi-telecentric optical design gives more friendly interfaces with pre-optics and
spectrograph than the conceptual design. Here, more technical issues are discussed to guide the further study on optical performance and fabrication feasibility.
关键词Thirty Meter Telescope Infrared Imaging Spectrograph Integral Field Unit Image Slicer
学科领域天文技术与方法
语种英语
文献类型会议论文
条目标识符http://ir.niaot.ac.cn/handle/114a32/1559
专题会议论文
作者单位1.南京天文光学技术研究所
2.天文光学技术重点实验室
3.中国科学院大学
推荐引用方式
GB/T 7714
Kai Zhang,Yifei Zhou,Yongtian Zhu,et al. The infrared imaging spectrograph (IRIS) for TMT: design of image slicer[C],2018.
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