Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Xin Xiong and Chenguang Yin and Lue Quan and Ryo Sato and Hiraku Matsukuma and Yuki Shimizu and Hideaki Tamiya and Wei Gao,Self-Calibration of a Large-Scale Variable-Line-Spacing Grating for an Absolute Optical Encoder by Differencing Spatially Shifted Phase Maps from a Fizeau Interferometer,Sensors,1424-8220,MDPI AG,2022-12-01,22,23,9348,https://cir.nii.ac.jp/crid/1360298754833333248,https://doi.org/10.3390/s22239348