A Fast and High-precision Alignment Method for IFU Based on Optical Interferometry and Fresnel Diffraction. (1st October 2022)

• Record Type: Journal Article
• 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
• Is Part Of: Publications of the Astronomical Society of the Pacific. Volume 134:Number 1040(2022)
• Publication Date: 2022-10-01
• Subjects: Astronomy -- Periodicals; Astronomy; Periodicals; Periodicals; 520.5
• DOI: 10.1088/1538-3873/ac8d2d
• Languages: English
• ISSNs: 0004-6280

Abstract

Abstract: 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.