A Fast and High-precision Alignment Method for IFU Based on Optical Interferometry and Fresnel Diffraction

High-precision alignment between the microlens array and the fiber-positioning microplate is of great significance in developing fiber-based integrated field units (IFU). In this paper, we propose a method combining optical interference and a Fresnel diffraction model to realize fast and accurate al...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 2022-10, Vol.134 (1040), p.104503
Main Authors: Wang, Anzhi, Wang, Jiabin, Yang, Xingyu, Wang, Shengjia, Yan, Yunxiang, Yan, Qi, Lu, Chunlian, Li, Song, Geng, Tao, Sun, Weimin, Chen, Shuang, Zhong, Yue, Xu, Zhi, Qu, Zhongquan
Format: Article
Language:English
Subjects:
Astronomical instrumentation
Astronomical techniques
Diffraction
Interferometry
Optical interferometry
Solar instruments
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Summary:High-precision alignment between the microlens array and the fiber-positioning microplate is of great significance in developing fiber-based integrated field units (IFU). In this paper, we propose a method combining optical interference and a Fresnel diffraction model to realize fast and accurate alignment. The minimum resolution angles of the tip and tilt in the optical interference-assisted alignment experiment are 2.6 × 10 −4° and 1.3 × 10 −4° , respectively. The errors in the remaining four degrees of freedom, x , y , z , and roll, are simulated by the Fresnel diffraction model. Finally, the output energy of 96.7% of the number of fibers is within a tolerance error of 10% and the relative energy reaches its highest level, which meets the IFU requirement.
ISSN:0004-6280
1538-3873
DOI:10.1088/1538-3873/ac8d2d