A dispersive backend design for the 'double-Fourier' interferometer BETTII

A dispersive backend design for the 'double-Fourier' interferometer BETTII
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“双傅立叶”干涉仪 BETTII 的色散后端设计

DOI:
10.1117/12.2312138
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发表时间:
2018
期刊:
The American journal of orthopsychiatry
影响因子:
--
通讯作者:
J. Vila Hernandez de Lorenzo
J. Vila Hernandez de Lorenzo
中科院分区:
--
文献类型:
--
作者:
A. Dhabal;S. Rinehart;J. Mentzell;M. Rizzo;L. Mundy;D. Fixsen;T. Veach;R. Juanola;J. Vila Hernandez de Lorenzo

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BETTII(用于红外干涉测量的气球实验双望远镜)旨在提供远红外(FIR)波长的高角分辨率光谱数据。BETTII最重要的限制是它的灵敏度;在13 Jy中获得光谱信噪比&gt;5<10 minutes requires sources >。提高未来BETTII飞行的信噪比(SNR)的一种可能方法是通过减少波束组合后的频谱带宽。这涉及使用色散元件来在检测器阵列上展开多色点源PSF,使得每个像素对应于带宽的一小部分。这导致干涉条纹图案的更宽的包络,从而允许检测到更多的条纹,并由此提高光谱SNR。在这里,我们提出了色散后端的分析和光学设计,讨论了权衡以及如何将其与现有设计相结合。
BETTII (Balloon Experimental Twin Telescope for Infra-red Interferometry) is designed to provide high angular resolution spectroscopic data in the far-infrared (FIR) wavelengths. The most significant limitation for BETTII is its sensitivity; obtaining spectral signal-to-noise ratio >5 in <10 minutes requires sources >13 Jy. One possible way to improve the signal-to-noise ratio (SNR) for future BETTII flights is by reducing the spectral bandwidth post beam-combination. This involves using a dispersive element to spread out a polychromatic point source PSF on the detector array, such that each pixel corresponds to a small fraction of the bandwidth. This results in a broader envelope of the interferometric fringe pattern allowing more fringes to be detected, and thereby improving the spectral SNR. Here we present the analysis and optical design of the dispersive backend, discussing the tradeoffs and how it can be combined with the existing design.
用于红外干涉测量的气球实验双望远镜(BETTII):首次飞行
DOI: 10.1117/12.2311497
发表时间: 2018
期刊: --
影响因子: --
作者:
Savini G
通讯作者: Savini G
用于红外干涉测量的气球实验双望远镜(BETTII):远红外高角分辨率实验
DOI: 10.1086/677402
发表时间: 2014
影响因子: 3.5
作者:
Rinehart S
通讯作者: Rinehart S