High-temperature flow field's electron number density measurement by two-wavelength moiré tomography Chen, Yun-yun ; Song, Yang ; Gu, Fang ; Shao, Shao-feng ; Zhang, Ying-ying Abstract Publication: Optics Letters Pub Date: April 2016 DOI: 10.1364/OL.41.001640 Bibcode: 2016OptL...41.1640C