标题： 光纤分辨光学和近紫外Czerny-Turner成像光谱偏振仪（FRANCIS） 显示英文标题

标题： The Fibre Resolved opticAl and Near-ultraviolet Czerny-Turner Imaging Spectropolarimeter (FRANCIS)

摘要： 太阳物理界正在进入一个黄金时代，这个时代充满了下一代地面和空间设施。 随着最新观测望远镜带来的分辨率不断提高，要在这些新设施的衍射极限下同时获得高空间、时间和光谱分辨率的（近）同时测量变得更加具有挑战性。 因此，在近年来，人们对积分场单元（IFUs）提供获取高空间、时间及光谱分辨率三者兼得的能力表现出了更大的兴趣。 迄今为止，为太阳物理研究开发的IFUs主要集中在中光学和红外测量上。 在这里，我们介绍了一个IFU原型，它被设计用于近紫外到中光学波长范围内的操作，从而为迄今为止开发的仪器套件提供了额外的光谱覆盖范围。 该IFU是以低成本概念验证的形式为即将推出的2米级印度国家大型太阳望远镜建造的，并使用圆形截面光纤引导光线进入Czerny-Turner配置光谱仪，所得光谱由高量子效率科学CMOS相机捕获。 每个输入光纤的映射允许重建二维光谱图像，以非偏振配置运行时，帧率可超过每秒20帧。 这里展示的科学验证数据突显了在近紫外波长下工作的光纤馈送IFUs在太阳物理学研究中的适用性。 重要的是，这种类型仪器的成功演示为未来技术发展铺平了道路，使其未来的变种适合即将到来的地面和空间望远镜设施。 显示英文摘要

摘要： The solar physics community is entering a golden era that is ripe with next-generation ground- and space-based facilities. With ever-increasing resolving power stemming from the newest observational telescopes, it becomes more challenging to obtain (near-)simultaneous measurements at high spatial, temporal and spectral resolutions, while operating at the diffraction limit of these new facilities. Hence, in recent years there has been increased interest in the capabilities integral field units (IFUs) offer towards obtaining the trifecta of high spatial, temporal and spectral resolutions contemporaneously. To date, IFUs developed for solar physics research have focused on mid-optical and infrared measurements. Here, we present an IFU prototype that has been designed for operation within the near-ultraviolet to mid-optical wavelength range, hence providing additional spectral coverage to the instrument suites developed to date. The IFU was constructed as a low-budget proof-of-concept for the upcoming 2m class Indian National Large Solar Telescope and employs circular cross-section fibres to guide light into a Czerny-Turner configuration spectrograph, with the resulting spectra captured using a high quantum efficiency scientific CMOS camera. Mapping of each input fibre allows for the reconstruction of two-dimensional spectral images, with frame rates exceeding 20 per second possible while operating in a non-polarimetric configuration. The science verification data presented here highlights the suitability of fibre-fed IFUs operating at near-ultraviolet wavelengths for solar physics research. Importantly, the successful demonstration of this type of instrument paves the way for further technological developments to make a future variant suitable for upcoming ground-based and space-borne telescope facilities.